added endpoint for group leaving

added endpoint for group ownership transfer
added rename endpoint for groups
2024-11-18 13:54:05 +03:00 · 2024-11-18 13:34:39 +03:00 · 2024-11-18 12:32:11 +03:00 · 2024-11-14 03:41:34 +03:00 · 2024-11-13 23:25:58 +03:00 · 2024-11-13 23:09:50 +03:00
36 changed files with 1284 additions and 374 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -139,3 +139,4 @@ dist
 #Local
 uploads
 temp
+config.json
--- a/7
+++ b/7
@@ -0,0 +1,7 @@
+FROM node:22-bullseye
+
+COPY . .
+RUN npm i
+
+EXPOSE 3000
+ENTRYPOINT ["node", "./src/index.js"]
--- a/README.md
+++ b/README.md
@@ -1,2 +1,9 @@
 # bsfe_server

+## Deployment
+
+1.Copy ``sample.config.json`` to ``config.json``
+2. Edit ``config.json`` to your needs (port, database credentials)
+3. Edit ``docker-compose.yml`` (insert changed port and database credentials from ``config.json``)
+4. First-time: ``docker-compose up --build``
+5. Then just: ``docker-compose up -d``
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -0,0 +1,23 @@
+services:
+  bsfe:
+    build: .
+
+    ports:
+      - 8012:8080
+      - 8282:8282
+    depends_on:
+      - database
+    restart: on-failure
+    volumes:
+      - ./data/temp:/temp
+      - ./data/uploads:/uploads
+  database:
+    image: 'postgres:15'
+    volumes:
+      - ./data/db:/var/lib/postgresql/data
+    environment:
+      POSTGRES_USER: bsfe
+      POSTGRES_PASSWORD: Ch@NgEME!
+      POSTGRES_DB: bsfe
+    healthcheck:
+      test: ["CMD", "pg_isready", "-U", "bsfe"]
--- a/messages/en-US/msgs.json
+++ b/messages/en-US/msgs.json
@@ -0,0 +1,54 @@
+{
+    "authentication not found": "Authentication token not found!",
+    "authentication invalid": "Authentication token is invalid",
+    "user duplicate": "Such user already exists!",
+    "user invalid syntax": "Invalid syntax in one of user's parameters!",
+    "user already in group": "User is already in group!",
+    "user not found": "User does not exists!",
+    "admin leave": "You are an admin of that group. You must transfer ownership of that group first!",
+    "username taken": "Username is taken!",
+    "username not found": "Such username not found!",
+    "username required": "Username is required!",
+    "password required": "Password is required!",
+    "password invalid": "Wrong password!",
+    "group name taken": "Group name is taken!",
+    "group name not found": "Group with such name not found!",
+    "group id not found": "Group with such ID not found!",
+    "group not an owner": "You are not an owner of this group!",
+    "group not a member": "You are not a member of this group!",
+    "name not specified": "New name of a group is not specified!",
+    "new owner not specified": "ID of a new group owner is not specified!",
+    "abstract product not found": "Such abstract product is not found!",
+    "abstract product invalid syntax": "Invalid syntax in one of user's parameters!",
+    "barcode not found": "Such barcode not found!",
+    "barcode duplicate": "Such barcode already exists!",
+    "barcode too long": "This barcode is too long!",
+    "barcode invalid syntax": "Invalid syntax in barcode!",
+    "abstract product name not found": "Abstract product with such name not found!",
+    "abstract product name duplicate": "Abstract product with such name already exists!",
+    "abstract product name too long": "Abstract product name is too long!",
+    "abstract product name invalid syntax": "Invalid syntax in abstract product name!",
+    "net weight too long": "Specified net weight is too long!",
+    "net weight invalid syntax": "Invalid syntax in specified net weight!",
+    "image hash too long": "Specified image hash is too long!",
+    "image hash invalid syntax": "Invalid syntax in specified image hash!",
+    "category too long": "Specified category is too long!",
+    "category invalid syntax": "Invalid syntax in specified category!",
+    "category not found": "Such category not found!",
+    "unit too long": "Specified unit is too long!",
+    "unit invalid syntax": "Invalid syntax in specified unit!",
+    "product not found": "Such product not found!",
+    "product invalid syntax": "Invalid syntax in one of product's parameters!",
+    "abstract product id not found": "Specified abstract product id not found!",
+    "abstract product id invalid syntax": "Invalid syntax in abstract product id!",
+    "expiry date too long": "Specified expiry date is too long!",
+    "expiry date invalid syntax": "Invalid syntax in specified expiry date!",
+    "categories not found": "Such category not found!",
+    "categories duplicate": "Such category already exists!",
+    "categories invalid syntax": "Invalid syntax in one of category parameters!",
+    "ok": "Successfull.",
+    "invalid syntax": "Invalid syntax!",
+    "png only": "Only .png files are allowed!",
+    "too long": "Specified value is too long!",
+    "unknown": "Unknown server error. Please, contact the develoeper!"
+}
--- a/messages/ru-RU/msgs.json
+++ b/messages/ru-RU/msgs.json
@@ -0,0 +1,54 @@
+{
+    "authentication not found": "Токен аутентификации не найден!",
+    "authentication invalid": "Токен аутентификации неверен!",
+    "user duplicate": "Такой пользователь уже существует!",
+    "user invalid syntax": "Неправильный синткасис в одном из параметров пользователя!",
+    "user already in group": "Пользователь уже в группе!",
+    "user not found": "Пользователь не существует!",
+    "admin leave": "Вы являетесь администратором группы. Перед выходом передайте владение группой!",
+    "username taken": "Имя пользователя занято!",
+    "username not found": "Такое имя пользователя не найдено!",
+    "username required": "Требуется имя пользователя!",
+    "password required": "Требуется пароль!",
+    "password invalid": "Неверный пароль!",
+    "group name taken": "Такое имя группы уже существует!",
+    "group name not found": "Группы с таким именем не существует!",
+    "group id not found": "Группы с таким ID не существует!",
+    "group not an owner": "Вы не владелец этой группы!",
+    "group not a member": "Вы не участник этой группы!",
+    "name not specified": "Не указано новое имя группы!",
+    "new owner not specified": "Не указан ID нового владельца группы!",
+    "abstract product not found": "Такой абстрактный продукт не найден!",
+    "abstract product invalid syntax": "Неправильный синткасис в одном из параметров абстрактного продукта!",
+    "barcode not found": "Такой штрихкод не найден!",
+    "barcode duplicate": "Такой штрихкод уже существует!",
+    "barcode too long": "Этот штрихкод слишком большой!",
+    "barcode invalid syntax": "Этот штрихкод неверен!",
+    "abstract product name not found": "абстрактного продукта с таким именем не найдено!",
+    "abstract product name duplicate": "абстрактный продукт с таким именем уже существует!",
+    "abstract product name too long": "Имя абстрактного продукта слишком длинное!",
+    "abstract product name invalid syntax": "Неверный синткасис в имени абстрактного продукта!",
+    "net weight too long": "Указанный вес нетто слишком длинный!",
+    "net weight invalid syntax": "Неверный указанный вес нетто!",
+    "image hash too long": "Указанный хеш изображения слишком длинный!",
+    "image hash invalid syntax": "Неверный указанный хеш изображения!",
+    "category too long": "Указанная категория слишком длинная!",
+    "category invalid syntax": "Неверный синткасис в категории!",
+    "category not found": "Такая категория не найдена!!",
+    "unit too long": "Указанная единица измерения слишком длинная!",
+    "unit invalid syntax": "Неправильный синткасис в указанной единице измерения!",
+    "product not found": "Такой продукт не найден!",
+    "product invalid syntax": "Неверный синткасис в одном из параметров продукта!",
+    "abstract product id not found": "Абстрактный продукт с таким ID не найден!",
+    "abstract product id invalid syntax": "Неверный синткасис ID абстрактного продукта!",
+    "expiry date too long": "Указанная дата годен до слишком длинная!",
+    "expiry date invalid syntax": "Неверный синткасис в указанной дате годен до!",
+    "categories not found": "Накая категория не найдена!",
+    "categories duplicate": "Такая категория уже существует!",
+    "categories invalid syntax": "Неверный синткасис одного из параметров категории!",
+    "ok": "Успешно.",
+    "invalid syntax": "Неправильный синткасис!",
+    "png only": "Разрешены только файлы формата .png!",
+    "too long": "Указанное значение слишком длинное!",
+    "unknown": "Неизвестная ошибка сервера! Пожалуйста, сообщите разработчику!"
+}
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,9 @@
        "multer": "^1.4.5-lts.1",
        "nodemon": "^3.1.7",
        "path": "^0.12.7",
-        "pg": "^8.13.1"
+        "pg": "^8.13.1",
+        "websocket": "^1.0.35",
+        "ws": "^8.18.0"
      }
    },
    "node_modules/@mapbox/node-pre-gyp": {
@@ -228,6 +230,19 @@
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      "license": "MIT"
    },
+    "node_modules/bufferutil": {
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    "node_modules/busboy": {
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      "license": "MIT"
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+      "license": "ISC",
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+        "type": "^2.7.2"
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@@ -527,12 +555,67 @@
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+      "license": "ISC",
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+        "es6-symbol": "^3.1.3",
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+        "next-tick": "^1.1.0"
+      },
+      "engines": {
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+        "es5-ext": "^0.10.35",
+        "es6-symbol": "^3.1.1"
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      "license": "MIT"
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@@ -542,6 +625,16 @@
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@@ -2022,6 +2162,19 @@
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+      }
+    },
+    "node_modules/websocket/node_modules/debug": {
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "license": "MIT",
+      "dependencies": {
+        "ms": "2.0.0"
+      }
+    },
+    "node_modules/websocket/node_modules/ms": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+      "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A==",
+      "license": "MIT"
+    },
    "node_modules/whatwg-url": {
      "version": "5.0.0",
      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
@@ -2092,6 +2277,27 @@
      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
      "license": "ISC"
    },
+    "node_modules/ws": {
+      "version": "8.18.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz",
+      "integrity": "sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
    "node_modules/xtend": {
      "version": "4.0.2",
      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
@@ -2101,6 +2307,15 @@
        "node": ">=0.4"
      }
    },
+    "node_modules/yaeti": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/yaeti/-/yaeti-0.0.6.tgz",
+      "integrity": "sha512-MvQa//+KcZCUkBTIC9blM+CU9J2GzuTytsOUwf2lidtvkx/6gnEp1QvJv34t9vdjhFmha/mUiNDbN0D0mJWdug==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.32"
+      }
+    },
    "node_modules/yallist": {
      "version": "4.0.0",
      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
--- a/package.json
+++ b/package.json
@@ -19,7 +19,9 @@
    "multer": "^1.4.5-lts.1",
    "nodemon": "^3.1.7",
    "path": "^0.12.7",
-    "pg": "^8.13.1"
+    "pg": "^8.13.1",
+    "websocket": "^1.0.35",
+    "ws": "^8.18.0"
  },
  "type": "module"
 }
--- a/sample.config.json
+++ b/sample.config.json
@@ -1,6 +1,7 @@
 {
    "debug": true,
    "port": "8081",
+    "wsport": "8282",
    "dbuser": "bsfe",
    "dbhost": "localhost",
    "dbport": "5432",
--- a/src/controllers/abstractproduct.js
+++ b/src/controllers/abstractproduct.js
@@ -1,79 +1,115 @@
 import AbstractProductService from '../services/abstractproduct.js';
-import statuses from '../utils/status.js';
-import log from '../utils/log.js';
+import ProductService from '../services/product.js';
 import fs from 'fs';
 import path from 'path';
+import customError from '../response/customError.js';
+import responseCodes from '../response/responseCodes.js';
+import translate from '../utils/translate.js';
+import { createHash } from 'crypto';
+import notify from '../utils/notify.js';

 const TAG = "/controllers/abstractproduct.js";

 class AbstractProductController {
    async create(req, res) {
-        try {
-            const { groupId, localId, barcode, name, net_weight, image_filename, category, unit } = req.body;
+        const { groupId, localId, barcode, name, net_weight, category, unit } = req.body;

-            const tempPath = req.file.path;
-            const targetPath = path.join(path.resolve(path.dirname('')), `/uploads/${image_filename}.png`);
+        if (!req.file) throw new customError(`user hasn't supplied a file for abstract product creation`, responseCodes.responses.image_filename)

-            if (path.extname(req.file.originalname).toLowerCase() !== ".png") {
-                return res.status(400).send("Only .png files are allowed")
-            }
+        const tempPath = req.file.path;
+        const image_buffer = fs.readFileSync(tempPath);
+        const image_filename = createHash('md5').update(image_buffer).digest('hex');
+        const targetPath = path.join(path.resolve(path.dirname('')), `/uploads/${image_filename}.png`);

-            fs.renameSync(tempPath, targetPath);
-
-            await AbstractProductService.create(groupId, localId, barcode, name, net_weight, image_filename, category, unit);
-            return res.status(200).send("Successfull");
-        } catch (e) {
-            switch (e.status) {
-                case statuses.duplicate:
-                    return res.status(400).send(e.message);
-                default:
-                    log.error(e.original);
-                    return res.status(500).send(e.message);
-            }
+        if (path.extname(req.file.originalname).toLowerCase() !== ".png") {
+            fs.rmSync(tempPath);
+            throw new customError(`create abstract product only png allowed`, responseCodes.responses.general.png_only);
        }
+
+        fs.copyFileSync(tempPath, targetPath);
+        fs.rmSync(tempPath);
+
+        await AbstractProductService.create(groupId, localId, barcode, name, net_weight, image_filename, category, unit);
+
+        notify(req.headers.authorization.split(' ')[1], groupId, 'create', 'abstractproduct', {
+            local_id: localId, barcode, name, net_weight, image_filename, category, unit
+        });
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
    }

    async update(req, res) {
-        try {
-            let { groupId, localId, barcode, name, net_weight, image_filename, category, unit } = req.body;
+        let { groupId, localId, barcode, name, net_weight, category, unit } = req.body;

-            const tempPath = req.file.path;
-            const targetPath = path.join(path.resolve(path.dirname('')) + `/uploads/${image_filename}.png`);
+        var tempPath, image_buffer, image_filename, targetPath;
+
+        if (req.file) {
+            tempPath = req.file.path;
+
+            let previousImageHash = (await AbstractProductService.getByLocalId(groupId, localId)).image_filename
+            let previousImagePath = path.join(path.resolve(path.dirname('')), `/uploads/${previousImageHash}.png`);
+            fs.unlinkSync(previousImagePath)
+
+            image_buffer = fs.readFileSync(tempPath);
+            image_filename = createHash('md5').update(image_buffer).digest('hex');
+            targetPath = path.join(path.resolve(path.dirname('')) + `/uploads/${image_filename}.png`);
+            fs.copyFileSync(tempPath, targetPath);
+            fs.rmSync(tempPath);


-            if (barcode) await AbstractProductService.updateBarcode(groupId, localId, barcode);
-
-            if (name) await AbstractProductService.updateName(groupId, localId, name);
-
-            if (net_weight) await AbstractProductService.updateNetWeight(groupId, localId, net_weight);
-
-            if (image_filename && tempPath) {
-                fs.renameSync(tempPath, targetPath);
-                await AbstractProductService.updateImageFilename(groupId, localId, image_filename);
-            } else if (image_filename && !tempPath) {
-                return res.status(400).send("You must supply image file along with its hash");
-            } else if (!image_file && tempPath) {
-                return res.status(400).send("You must supply image file hash along with file");
-            }
-
-            if (category) await AbstractProductService.updateCategory(groupId, localId, category);
-
-            if (unit) await AbstractProductService.updateUnit(groupId, localId, unit);
-
-            return res.status(200).send("Successfull");
-        } catch (e) {
-            switch (e.status) {
-                case statuses.invalid_syntax:
-                    log.error(e.original);
-                    return res.status(400).send(e.message);
-                default:
-                    log.error(e.original);
-                    return res.status(500).send(e.message);
-            }
        }
+
+        if (barcode) await AbstractProductService.updateBarcode(groupId, localId, barcode);
+
+        if (name) await AbstractProductService.updateName(groupId, localId, name);
+
+        if (net_weight) await AbstractProductService.updateNetWeight(groupId, localId, net_weight);
+
+        if (tempPath) await AbstractProductService.updateImageFilename(groupId, localId, image_filename);
+
+        if (category) await AbstractProductService.updateCategory(groupId, localId, category);
+
+        if (unit) await AbstractProductService.updateUnit(groupId, localId, unit);
+
+        let data = await AbstractProductService.getByLocalId(groupId, localId)
+
+        notify(req.headers.authorization.split(' ')[1], groupId, 'update', 'abstractproduct', data);
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
    }

-    // async updateImage(req, res) {}
+    async getById(req, res) {
+        let { localId, groupId } = req.params
+
+        let result = await AbstractProductService.getByLocalId(groupId, localId)
+
+        return res.status(200).send(result)
+    }
+
+    async getImage(req, res) {
+        let { localId, groupId } = req.params;
+
+        let imageFilename = (await AbstractProductService.getByLocalId(groupId, localId)).image_filename
+        let imagePath = path.join(path.resolve(path.dirname('')), `/uploads/${imageFilename}.png`);
+
+        let image = fs.readFileSync(imagePath)
+
+        return res.status(200).send(image)
+    }
+
+    async delete(req, res) {
+        let { localId, groupId } = req.params;
+
+        let imageFilename = (await AbstractProductService.getByLocalId(groupId, localId)).image_filename
+        let imagePath = path.join(path.resolve(path.dirname('')), `/uploads/${imageFilename}.png`);
+        fs.unlinkSync(imagePath)
+
+        await AbstractProductService.delete(groupId, localId)
+
+        notify(req.headers.authorization.split(' ')[1], groupId, 'delete', 'abstractproduct', { local_id: localId });
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok))
+    }
 };

 export default new AbstractProductController();
--- a/src/controllers/category.js
+++ b/src/controllers/category.js
@@ -1,25 +1,51 @@
 import CategoryService from "../services/category.js";
-import log from "../utils/log.js";
+import translate from "../utils/translate.js";
+import responseCodes from "../response/responseCodes.js";
+import notify from "../utils/notify.js";
+
 const TAG = "controllers/category.js";

 class CategoryController {
    async create(req, res) {
-        try {
-            const { localId, categoryName, groupId } = req.body;
+        const { localId, categoryName, groupId } = req.body;

-            await CategoryService.create(groupId, localId, categoryName);
-            return res.status(200).send("Success");
+        await CategoryService.create(groupId, localId, categoryName);

-        } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/create: ${e}`)); }
+        notify(req.headers.authorization.split(' ')[1], groupId, 'create', 'category', {
+            local_id: localId, name: categoryName
+        });
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
    }

    async update(req, res) {
-        try {
-            const { localId, groupId, name } = req.body;
+        const { localId, groupId, categoryName } = req.body;

-            await CategoryService.update(groupId, localId, name);
-            return res.status(200).send("Success");
-        } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/update: ${e}`)); }
+        await CategoryService.update(groupId, localId, categoryName);
+
+        let data = await CategoryService.getById(groupId, localId)
+
+        notify(req.headers.authorization.split(' ')[1], groupId, 'update', 'category', data);
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
+    }
+
+    async getByLocalId(req, res) {
+        const { groupId, localId } = req.params;
+
+        let result = await CategoryService.getById(groupId, localId)
+
+        return res.status(200).send(result)
+    }
+
+    async delete(req, res) {
+        const { groupId, localId } = req.params;
+
+        await CategoryService.delete(groupId, localId);
+
+        notify(req.headers.authorization.split(' ')[1], groupId, 'delete', 'category', { local_id: localId });
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok))
    }
 };

--- a/src/controllers/group.js
+++ b/src/controllers/group.js
@@ -2,49 +2,112 @@ import GroupService from '../services/group.js';
 import UserService from '../services/user.js';
 import jwt from 'jsonwebtoken';
 import config from '../../config.json' with {type: "json"};
-import statuses from '../utils/status.js';
 import log from '../utils/log.js';
+import translate from '../utils/translate.js';
+import responseCodes from '../response/responseCodes.js';
+import customError from '../response/customError.js';

 const TAG = "/controllers/group.js";

 class GroupController {
    async create(req, res) {
-        try {
-            let { groupName } = req.params;
+        let { groupName } = req.params;

-            let user = jwt.decode(req.headers.authorization.split(' ')[1], config.secret);
-            let status = await GroupService.create(groupName, user.login.id);
+        let user = jwt.decode(req.headers.authorization.split(' ')[1], config.secret);
+        let group = await GroupService.create(groupName, user.login.id);

-            log.info(`New group with name ${groupName} was just created by user ${user.login.username}`);
-
-            UserService.joinGroup(user.login.id, status.id);
-            return res.status(200).send("Successfull");
-        } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/create: ${e}`)); }
+        await UserService.joinGroup(user.login.id, group.id);
+        return res.status(200).send(group.id.toString())
    }
    async join(req, res) {
-        try {
-            let { groupId } = req.params;
+        let { groupId } = req.params;

-            let user = jwt.decode(req.headers.authorization.split(' ')[1], config.secret);
-            let status = await UserService.joinGroup(user.login.id, groupId);
+        let user = jwt.decode(req.headers.authorization.split(' ')[1], config.secret);
+        await UserService.joinGroup(user.login.id, groupId);

-            if (status == statuses.duplicate) return res.status(400).send("Already in group");
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
+    }

-            log.info(`User ${user.login.username} has just joined group with ID ${groupId}`);
-            return res.status(200).send("Successfull");
-        } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/join: ${e}`)); }
+    async leave(req, res) {
+        let groupId = req.params.groupId;
+
+        let user = jwt.decode(req.headers.authorization.split(' ')[1], config.secret);
+
+        if (await GroupService.getAdminId(groupId) == user.login.id) {
+            let code = responseCodes.responses.user.admin_leave
+            return res.status(responseCodes.getHTTPCode(code)).send(translate(req.headers["accept-language"], code))
+        }
+
+        await UserService.leaveGroup(user.login.id, groupId);
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
    }

    async updatePassword(req, res) {
-        try {
-            let { groupId } = req.params;
-            let { password } = req.body;
+        let { groupId } = req.params;
+        let { password } = req.body;

-            await GroupService.updatePassword(groupId, password);
-            log.info(`Password for group with ID ${groupId} was updated`);
-            return res.status(200).send("Successfull");
+        await GroupService.updatePassword(groupId, password);
+        log.info(`Password for group with ID ${groupId} was updated`);

-        } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/updatePassword ${e}`)); }
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
+    }
+
+    async getByName(req, res) {
+        let groupName = req.params.groupName || req.body.groupName;
+
+        let group = await GroupService.getByName(groupName);
+
+        return res.status(200).send(group["id"].toString());
+    }
+
+    async getById(req, res) {
+        let groupId = req.params.groupId;
+
+        let groupName = (await GroupService.getById(groupId)).name;
+
+        return res.status(200).send(groupName);
+    }
+
+    async getUsersInGroup(req, res) {
+
+        const groupId = req.params.groupId;
+
+        let result = await GroupService.getUsersInGroup(groupId);
+
+        return res.status(200).send(result);
+    }
+
+    async getAdminId(req, res) {
+        const groupId = req.params.groupId;
+
+        let result = await GroupService.getAdminId(groupId);
+
+        if (!result) result = -1
+
+        return res.status(200).send(result.toString())
+    }
+
+    async rename(req, res) {
+        const groupId = req.params.groupId;
+        const name = req.body.name;
+
+        if (!name) throw new customError(`New group name is not specified`, responseCodes.responses.groups.name_not_specified);
+
+        await GroupService.rename(groupId, name);
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
+    }
+
+    async transferOwnership(req, res) {
+        const groupId = req.params.groupId;
+        const userId = req.body.userId;
+
+        if (!userId) throw new customError(`New owner id is not specified`, responseCodes.responses.groups.new_owner_not_specified);
+
+        await GroupService.transferOwnership(groupId, userId);
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
    }
 }

--- a/src/controllers/product.js
+++ b/src/controllers/product.js
@@ -1,47 +1,58 @@
 import ProductService from '../services/product.js';
-import statuses from '../utils/status.js';
-import log from '../utils/log.js';
-
+import translate from '../utils/translate.js';
+import responseCodes from '../response/responseCodes.js';
+import notify from '../utils/notify.js';
 const TAG = "/controllers/product.js"

 class AbstractProductController {
    async create(req, res) {
-        try {
-            const { groupId, localId, abstract_product_id, amount, date_of_production, expiry_date } = req.body;
-            await ProductService.create(groupId, localId, abstract_product_id, amount, date_of_production, expiry_date);
-            return res.status(200).send("Successfull");
-        } catch (e) {
-            switch (e.status) {
-                case statuses.duplicate:
-                    return res.status(400).send(e.message);
-                default:
-                    log.error(e.original)
-                    return res.status(500).send(e.message)
-            }
-        }
+        const { groupId, localId, abstract_product_id, amount, date_of_production, expiry_date } = req.body;
+
+        await ProductService.create(groupId, localId, abstract_product_id, amount, date_of_production, expiry_date);
+
+        let data = await ProductService.getByLocalId(groupId, localId)
+
+        notify(req.headers.authorization.split(' ')[1], groupId, 'create', 'product', data);
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
    }

-
    async update(req, res) {
-        try {
-            let { groupId, localId, abstract_product_id, amount, date_of_production, expiry_date } = req.body;
+        let { groupId, localId, abstract_product_id, amount, date_of_production, expiry_date } = req.body;

-            if (abstract_product_id) await ProductService.updateAbstractProductId(groupId, localId, abstract_product_id);
+        if (abstract_product_id) await ProductService.updateAbstractProductId(groupId, localId, abstract_product_id);

-            if (amount) await ProductService.updateAmount(groupId, localId, amount);
+        if (amount) await ProductService.updateAmount(groupId, localId, amount);

-            if (date_of_production) await ProductService.updateDateOfProduction(groupId, localId, date_of_production);
+        if (date_of_production) await ProductService.updateDateOfProduction(groupId, localId, date_of_production);

-            if (expiry_date) await ProductService.updateExpiryDate(groupId, localId, expiry_date);
-        } catch (e) {
-            switch (e.status) {
-                case statuses.invalid_syntax:
-                    log.error(e.original);
-                    return res.status(400).send(e.message);
-            }
-        }
+        if (expiry_date) await ProductService.updateExpiryDate(groupId, localId, expiry_date);

-        return res.status(200).send("Successfull");
+        let data = await ProductService.getByLocalId(groupId, localId)
+
+        notify(req.headers.authorization.split(' ')[1], groupId, 'update', 'product', data);
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
+    }
+
+    async getByLocalId(req, res) {
+        let { groupId, localId } = req.params;
+
+        let result = await ProductService.getByLocalId(groupId, localId)
+
+        return res.status(200).send(result)
+    }
+
+    async delete(req, res) {
+        let { groupId, localId } = req.params;
+
+        let id = (await ProductService.getByLocalId(groupId, localId)).id
+
+        await ProductService.delete(id)
+
+        notify(req.headers.authorization.split(' ')[1], groupId, 'delete', 'product', { local_id: localId });
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok));
    }
 };

--- a/src/controllers/user.js
+++ b/src/controllers/user.js
@@ -1,47 +1,93 @@
 import UserService from '../services/user.js';
 import log from '../utils/log.js';
 import bcrypt from 'bcrypt';
-import genToken from '../utils/jwt.js';
+import jwtutils from '../utils/jwt.js';
 import AbstractProductService from '../services/abstractproduct.js';
 import ProductService from '../services/product.js';
+import CategoryService from '../services/category.js';
+import translate from '../utils/translate.js';
+import responseCodes from '../response/responseCodes.js';
+import customError from '../response/customError.js';
+import { createHash } from 'crypto';

 const TAG = "/controllers/userjs"

 class UserController {
    async register(req, res) {
-        try {
-            const { username, password } = req.body;
+        const { username, password } = req.body;

-            await UserService.create(username, password);
+        let userId = await UserService.create(username, password);

-            log.info(`New user with name ${username} has just registered`);
-            return res.status(200).send("Successfull register");
-        } catch (e) { res.status(500).send(log.unknownError(`${TAG}/register: ${e}`)); }
+        log.info(`New user with name ${username} has just registered`);
+        return res.status(200).send(userId.toString());
    }

    async login(req, res) {
-        try {
-            const { username, password } = req.body;
+        const { username, password } = req.body;

-            const user = await UserService.getByUsername(username);
-            if (!bcrypt.compareSync(password, user.password)) return res.status(401).send("Wrong password");
+        const user = await UserService.getByUsername(username);
+        if (!bcrypt.compareSync(password, user.password)) throw new customError(`Wrong user password`, responseCodes.responses.passwords.invalid);

-            const token = genToken(user);
-            return res.status(200).send(token);
-        } catch (e) { res.status(500).send(log.unknownError(`${TAG}/login: ${e}`)); }
+        const token = jwtutils.genToken(user);
+        return res.status(200).send({ id: user.id, token: token });
    }

    async synchronize(req, res) {
-        try {
-            const { groupId } = req.params;
+        const { groupId } = req.params;

-            let result = {};
-            result.abstract_products = await AbstractProductService.getAll(groupId);
-            result.products = await ProductService.getAll(groupId);
-            result.categories = await CategoryService.getAll(groupId);
+        let result = {};
+        result.abstract_products = await AbstractProductService.getAll(groupId);
+        result.abstract_products.forEach((abstractproduct) => {
+            let data = `${abstractproduct.local_id}:${abstractproduct.barcode}:${abstractproduct.name}:${abstractproduct.net_weight}:${abstractproduct.image_filename}:${abstractproduct.category}:${abstractproduct.unit}`
+            abstractproduct.hash = createHash('md5').update(data).digest('hex');
+        });

-            return res.status(200).json(result);
-        } catch (e) { res.status(500).send(log.unknownError(`${TAG}/synchronize: ${e}`)); }
+        result.products = await ProductService.getAll(groupId);
+        result.products.forEach((product) => {
+            let data = `${product.local_id}:${product.abstract_product_id}:${product.amount}:${new Date(product.date_of_production).valueOf() / 1000}:${new Date(product.expiry_date).valueOf() / 1000}`
+            product.hash = createHash('md5').update(data).digest('hex');
+        });
+
+        result.categories = await CategoryService.getAll(groupId);
+        result.categories.forEach((category) => {
+            let data = `${category.local_id}:${category.name}`
+            category.hash = createHash('md5').update(data).digest('hex');
+        });
+
+        return res.status(200).send(result);
+    }
+
+    async changeUsername(req, res) {
+        const userId = jwtutils.getUserIdFromToken(req.headers.authorization.split(' ')[1]);
+        const { username } = req.body;
+
+        await UserService.changeUsername(userId, username);
+
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok))
+    }
+
+    async changePassword(req, res) {
+        const userId = jwtutils.getUserIdFromToken(req.headers.authorization.split(' ')[1]);
+        const { password } = req.body;
+
+        await UserService.changePassword(userId, password);
+        return res.status(200).send(translate(req.headers["accept-language"], responseCodes.responses.general.ok))
+    }
+
+    async getAllGroupsForUser(req, res) {
+        const userId = jwtutils.getUserIdFromToken(req.headers.authorization.split(' ')[1]);
+
+        let result = await UserService.getAllGroupsForUser(userId);
+
+        return res.status(200).send(result);
+    }
+
+    async getById(req, res) {
+        const userId = req.params.userId
+
+        let result = (await UserService.getById(userId)).username;
+
+        return res.status(200).send(result);
    }
 }

--- a/src/index.js
+++ b/src/index.js
@@ -1,5 +1,6 @@
 import express from 'express';
 import UserRouter from './routers/user.js';
+import UserService from './services/user.js';
 import GroupRouter from './routers/group.js';
 import AbstractProductRouter from './routers/abstractproduct.js';
 import log from './utils/log.js';
@@ -8,7 +9,13 @@ import config from '../config.json' with {type: "json"};
 import ProductRouter from './routers/product.js';
 import CategoryRouter from './routers/category.js';

+import { WebSocketServer } from 'ws';
+import jwt from 'jsonwebtoken';
+
 const app = express();
+const wss = new WebSocketServer({ port: config.wsport });
+
+const clients = [];

 app.use(express.urlencoded({ extended: false, limit: "200mb", parameterLimit: 100000 }));
 app.use(express.json({ limit: "200mb", parameterLimit: 1000000 }));
@@ -19,6 +26,59 @@ app.use('/api/abstractproduct', AbstractProductRouter);
 app.use('/api/product', ProductRouter);
 app.use('/api/category', CategoryRouter);

-app.listen(config.port, () => {
-    log.info(`Application has started on port ${config.port}`)
+app.get('/status', (req, res) => {
+    return res.status(200).send("All OK");
 });
+
+wss.on('connection', (client) => {
+    client.on('message', async (message) => {
+        if (message == "keepalive") return;
+
+        let parsed = JSON.parse(message);
+        let token = parsed.token;
+        let currentGroup = parsed.currentGroup;
+        try {
+            if (!jwt.verify(token, config.secret)) {
+                client.send("Invalid token");
+                return;
+            }
+
+            if (!await UserService.isInGroup(jwt.decode(token, config.secret).login.id, currentGroup)) {
+                client.send("Not a member of specified group");
+                return;
+            }
+        } catch (e) {
+            log.error("Error during connection through websocket.")
+            client.send("Error")
+            return;
+        }
+
+        clients.push({
+            socket: client,
+            token,
+            currentGroup
+        });
+    });
+
+    client.on('close', () => {
+        for (let i = 0; i < clients.length; i++) {
+            if (clients[i].socket == client) {
+                log.debug(`Client with token ${clients[i].token} has disconnected`)
+                clients.splice(i, 1);
+                break;
+            }
+        }
+    })
+});
+
+const server = app.listen(config.port, () => {
+    log.info(`Application has started on port ${config.port}`);
+});
+
+server.on('upgrade', (req, res, head) => {
+    wss.handleUpgrade(req, res, head, socket => {
+        wss.emit('connection', socket, req);
+    });
+});
+
+export default clients;
--- a/src/middlewares/auth.js
+++ b/src/middlewares/auth.js
@@ -1,73 +1,69 @@
-import log from '../utils/log.js'
 import jwt from 'jsonwebtoken';
 import config from '../../config.json' with {type: "json"};
 import GroupService from '../services/group.js';
 import UserService from '../services/user.js';
+import customError from '../response/customError.js';
+import responseCodes from '../response/responseCodes.js';

 const TAG = "/middlewares/auth.js";

 const requireUsername = async (req, res, next) => {
    if (req.method == "OPTIONS") next();

-    try {
-        const { username } = req.body;
-        if (!username) return res.status(400).send("Username is required");
-        next();
-    } catch (e) { return res.status(500).send(unknownError(`${TAG}/requireUsername: ${e}`)); }
+    const { username } = req.body;
+    if (!username) throw new customError(`requireUsername username is required`, responseCodes.responses.usernames.required)
+    next();
 };

 const requirePassword = async (req, res, next) => {
    if (req.method == "OPTIONS") next();

-    try {
-        const { password } = req.body;
-        if (!password) return res.status(400).send("Password is required");
-        next();
-    } catch (e) { return res.status(500).send(unknownError(`${TAG}/requirePassword: ${e}`)); }
+    const { password } = req.body;
+    if (!password) throw new customError(`requirePassword password is required`, responseCodes.responses.passwords.required);
+    next();
 };

 const authenticate = async (req, res, next) => {
    if (req.method == "OPTIONS") next();
+    if (!req.headers.authorization) throw new customError(`authenticate no authorization header`, responseCodes.responses.authentication.not_found);

-    try {
-        if (!req.headers.authorization) return res.status(403).send("No authorization header supplied");
-        const token = req.headers.authorization.split(' ')[1];
-        if (!token) return res.status(403).send("No authorization token supplied");
-        if (!jwt.verify(token, config.secret)) return res.status(403).send("Authorization token is incorrect");
+    const token = req.headers.authorization.split(' ')[1];
+    if (!token) throw new customError(`authenticate no authorization token in header`, responseCodes.responses.authentication.not_found);

-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/authenticate: ${e}`)); }
+    let user = jwt.decode(token, config.secret);
+
+    await UserService.getByUsername(user.login.username)
+
+    if (!jwt.verify(token, config.secret)) throw new customError(`authenticate token is invalid`, responseCodes.responses.authentication.invalid);
+
+    next();
 };

 const authorizeGroupOwner = async (req, res, next) => {
    if (req.method == "OPTIONS") next();

-    try {
-        const token = req.headers.authorization.split(' ')[1];
+    const token = req.headers.authorization.split(' ')[1];

-        const { groupId } = req.params;
+    const { groupId } = req.params;

-        let user = jwt.decode(token, config.secret);
+    let user = jwt.decode(token, config.secret);

-        let adminId = await GroupService.getAdminId(groupId);
-        if (user.login.id != adminId) return res.status(403).send("Not your group");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/authorizeGroupOwner: ${e}`)); }
+    let adminId = await GroupService.getAdminId(groupId);
+    if (user.login.id != adminId) throw new customError(`authorizeGroupOwner not an owner`, responseCodes.responses.groups.not_an_owner)
+    next();
 };

 const checkGroupPassword = async (req, res, next) => {
    if (req.method == "OPTIONS") next();

-    try {
-        const { groupId } = req.params;
-        const { password } = req.body;
+    const { groupId } = req.params;
+    const { password } = req.body;

-        const groupPassword = await GroupService.getPassword(groupId);
+    const groupPassword = await GroupService.getPassword(groupId);

-        if (groupPassword != password) return res.status(403).send("Wrong password");
-        next();
+    if (groupPassword != password) throw new customError(`checkGroupPassword password is invalid`, responseCodes.responses.passwords.invalid);
+    next();

-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/checkGroupPassword: ${e}`)); }
 };

 const userIsInGroup = async (req, res, next) => {
@@ -77,7 +73,7 @@ const userIsInGroup = async (req, res, next) => {

    const token = req.headers.authorization.split(' ')[1];
    let user = jwt.decode(token, config.secret);
-    if (!await UserService.isInGroup(user.login.id, groupId)) return res.status(403).send("You are not a member of this group");
+    if (!await UserService.isInGroup(user.login.id, groupId)) throw new customError(`userIsInGroup not a member`, responseCodes.responses.groups.not_a_member)
    next();
 };

--- a/src/middlewares/existance.js
+++ b/src/middlewares/existance.js
@@ -1,116 +1,33 @@
-import UserService from '../services/user.js';
+import customError from '../response/customError.js';
+import responseCodes from '../response/responseCodes.js';
 import GroupService from '../services/group.js';
-import AbstractProductService from '../services/abstractproduct.js';
-import ProductService from '../services/product.js';
-import CategoryService from '../services/category.js';
-import log from '../utils/log.js';
-import statuses from '../utils/status.js';
-
-const TAG = "/middlewares/existance.js";
-
-const usernameExists = async (req, res, next) => {
-    try {
-        let { username } = req.body;
-
-        let user = await UserService.getByUsername(username);
-        if (!user || user == statuses.not_found) return res.status(404).send("User not found");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/usernameExists: ${e}`)); }
-};
-
-const usernameDoesntExist = async (req, res, next) => {
-    try {
-        let { username } = req.body;
-
-        let user = await UserService.getByUsername(username);
-        if (user != undefined && user != statuses.not_found) return res.status(400).send("Such username already taken");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/usernameDoesntExist: ${e}`)); }
-};

 const groupExists = async (req, res, next) => {
-    try {
-        let groupId = req.params.groupId || req.body.groupId;
+    let groupId = Number(req.params.groupId || req.body.groupId);

-        let group = await GroupService.getById(groupId);
+    if (isNaN(groupId)) throw new customError(`groupId is not a number`, responseCodes.responses.groups.id_not_found)

-        if (!group || group == statuses.not_found) return res.status(404).send("Group not found");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/groupExists: ${e}`)) }
+    let group = await GroupService.getById(groupId);
+
+    if (!group) throw new customError(`group does not exists`, responseCodes.responses.groups.id_not_found);
+    next();
 };

-const groupDoesntExist = async (req, res, next) => {
-    try {
-        let groupId = req.params.groupId || req.body.groupId;
+const groupNameExists = async (req, res, next) => {
+    let groupName = req.params.groupName || req.body.groupName;

-        let group = await GroupService.getById(groupId);
+    let group = await GroupService.getByName(groupName);

-        if (group || group != statuses.not_found) return res.status(400).send("Such group already exists");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/groupDoesntExist: ${e}`)) }
+    if (!group) throw new customError(`group does not exists`, responseCodes.responses.groups.name_not_found);
+    next();
 };

-const groupNameDoesntExist = async (req, res, next) => {
-    try {
-        const { groupName } = req.params;
+const localIdExists = async (req, res, next) => {
+    let localId = req.params.localId || req.body.localId;

-        let group = await GroupService.getByName(groupName);
-        if (group) return res.status(400).send("Such group name already exists");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/groupNameDoesntExist: ${e}`)); }
-};
+    if (!localId) throw new customError(`local id is not specified`, responseCodes.responses.general.invalid_syntax);
+    next();
+}

-const abstractProductExists = async (req, res, next) => {
-    try {
-        const { groupId, localId } = req.body;

-        let result = await AbstractProductService.exists(groupId, localId);
-        if (!result) return res.status(404).send("Abstract product not found");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/abstractProductExists: ${e}`)); }
-};
-
-const productExists = async (req, res, next) => {
-    try {
-        const { groupId, localId } = req.body;
-
-        let result = await ProductService.exists(groupId, localId);
-        if (!result) return res.status(404).send("Product not found");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/productExists: ${e}`)); }
-};
-
-const categoryNameDoesntExist = async (req, res, next) => {
-    try {
-        const { categoryName, localId, groupId } = req.body;
-
-        let result = await CategoryService.getByName(groupId, localId, categoryName);
-        if (result != statuses.not_found) return res.status(400).send("Such category name exists");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/categoryNameDoesntExist: ${e}`)); }
-};
-
-const categoryExists = async (req, res, next) => {
-    try {
-        const { localId, groupId } = req.body;
-
-        let result = await CategoryService.getById(groupId, localId);
-        if (!result || result == statuses.not_found) return res.status(404).send("No such category");
-        next();
-    } catch (e) { return res.status(500).send(log.unknownError(`${TAG}/categoryExists: ${e}`)); }
-};
-
-export default {
-    usernameExists,
-    usernameDoesntExist,
-
-    groupExists,
-    groupDoesntExist,
-    groupNameDoesntExist,
-
-    abstractProductExists,
-    productExists,
-
-    categoryNameDoesntExist,
-    categoryExists
-};
+export default { groupExists, localIdExists, groupNameExists }
--- a/src/response/customError.js
+++ b/src/response/customError.js
@@ -0,0 +1,12 @@
+class customError extends Error {
+    constructor(message, code) {
+        super(message)
+        if (Error.captureStackTrace) {
+            Error.captureStackTrace(this, customError);
+        }
+
+        this.code = code;
+    }
+}
+
+export default customError;
--- a/src/response/errorHandler.js
+++ b/src/response/errorHandler.js
@@ -0,0 +1,26 @@
+import log from "../utils/log.js";
+import customError from "./customError.js";
+import responses from './responseCodes.js';
+import translate from '../utils/translate.js';
+
+const errorHandler = (err, req, res) => {
+    log.error(err);
+    console.log(err);
+    let language = req.headers["accept-language"];
+
+    if (err instanceof customError) {
+        return res.status(responses.getHTTPCode(err.code)).send(translate(language, err.code));
+    }
+}
+
+const tryHandler = (func) => {
+    return async (req, res, next) => {
+        try {
+            await func(req, res, next);
+        } catch (err) {
+            errorHandler(err, req, res);
+        }
+    }
+}
+
+export default tryHandler;
--- a/src/response/responseCodes.js
+++ b/src/response/responseCodes.js
@@ -0,0 +1,213 @@
+const responses = {
+    authentication: {
+        not_found: "authentication not found",
+        invalid: "authentication invalid"
+    },
+    user: {
+        duplicate: "user duplicate",
+        invalid_syntax: "user invalid syntax",
+        already_in_group: "user already in group",
+        not_found: "user not found",
+        admin_leave: "admin leave"
+    },
+    usernames: {
+        duplicate: "username taken",
+        not_found: "username not found",
+        required: "username required"
+    },
+    passwords: {
+        required: "password required",
+        invalid: "password invalid"
+    },
+    groups: {
+        duplicate: "group name taken",
+        name_not_found: "group name not found",
+        id_not_found: "group id not found",
+        not_an_owner: "group not an owner",
+        not_a_member: "group not a member",
+        name_not_specified: "name not specified",
+        new_owner_not_specified: "new owner not specified"
+    },
+    abstractproducts: {
+        not_found: "abstract product not found",
+        invalid_syntax: "abstract product invalid syntax"
+    },
+    barcode: {
+        not_found: "barcode not found",
+        duplicate: "barcode duplicate",
+        too_long: "barcode too long",
+        invalid_syntax: "barcode invalid syntax"
+    },
+    abstractproductname: {
+        not_found: "abstract product name not found",
+        duplicate: "abstract product name duplicate",
+        too_long: "abstract product name too long",
+        invalid_syntax: "abstract product name invalid syntax"
+    },
+    netweight: {
+        too_long: "net weight too long",
+        invalid_syntax: "net weight invalid syntax"
+    },
+    imagehash: {
+        too_long: "image hash too long",
+        invalid_syntax: "image hash invalid syntax"
+    },
+    category: {
+        too_long: "category too long",
+        invalid_syntax: "category invalid syntax",
+        not_found: "category not found"
+    },
+    unit: {
+        too_long: "unit too long",
+        invalid_syntax: "unit invalid syntax"
+    },
+    products: {
+        not_found: "product not found",
+        invalid_syntax: "product invalid syntax"
+    },
+    abstractproductid: {
+        not_found: "abstract product id not found",
+        invalid_syntax: "abstract product id invalid syntax"
+    },
+    amount: {
+        too_long: "amount too long",
+        invalid_syntax: "amount invalid syntax"
+    },
+    dateofproduction: {
+        too_long: "date of production too long",
+        invalid_syntax: "date of production invalid syntax"
+    },
+    expirydate: {
+        too_long: "expiry date too long",
+        invalid_syntax: "expiry date invalid syntax"
+    },
+    categories: {
+        duplicate: "categories duplicate",
+        not_found: "categories not found"
+    },
+    general: {
+        ok: "ok",
+        invalid_syntax: "invalid syntax",
+        png_only: "png only",
+        too_long: "too long",
+        unknown: "unknown"
+    }
+}
+
+const getHTTPCode = (type) => {
+    switch (type) {
+        case responses.general.ok:
+            return 200
+        case responses.general.invalid_syntax:
+            return 400
+        case responses.general.unknown:
+            return 500
+        case responses.general.png_only:
+            return 400
+        case responses.general.too_long:
+            return 400
+
+        case responses.authentication.invalid:
+            return 403
+        case responses.authentication.not_found:
+            return 403
+
+        case responses.user.already_in_group:
+            return 409
+        case responses.user.duplicate:
+            return 409
+        case responses.user.invalid_syntax:
+            return 400
+        case responses.user.not_found:
+            return 404
+        case responses.user.admin_leave:
+            return 409
+
+
+        case responses.usernames.duplicate:
+            return 409
+        case responses.usernames.not_found:
+            return 404
+        case responses.usernames.required:
+            return 400
+
+        case responses.passwords.required:
+            return 400
+        case responses.passwords.invalid:
+            return 403
+
+        case responses.groups.id_not_found:
+            return 404
+        case responses.groups.name_not_found:
+            return 404
+        case responses.groups.duplicate:
+            return 409
+        case responses.groups.not_an_owner:
+            return 403
+        case responses.groups.not_a_member:
+            return 403
+        case responses.groups.name_not_specified:
+            return 400
+        case responses.new_owner_not_specified:
+            return 400
+
+        case responses.abstractproducts.not_found:
+            return 404
+        case responses.abstractproducts.invalid_syntax:
+            return 400
+
+        case responses.abstractproductid.invalid_syntax:
+            return 400
+        case responses.abstractproductid.not_found:
+            return 404
+
+        case responses.abstractproductname.duplicate:
+            return 409
+        case responses.abstractproductname.invalid_syntax:
+            return 400
+        case responses.abstractproductname.not_found:
+            return 404
+        case responses.abstractproductname.too_long:
+            return 400
+
+        case responses.amount.invalid_syntax:
+            return 400
+        case responses.amount.too_long:
+            return 409
+
+        case responses.barcode.duplicate:
+            return 409
+        case responses.barcode.invalid_syntax:
+            return 400
+        case responses.barcode.not_found:
+            return 404
+        case responses.barcode.too_long:
+            return 400
+
+        case responses.categories.duplicate:
+            return 409
+        case responses.categories.not_found:
+            return 404
+
+        case responses.category.invalid_syntax:
+            return 400
+        case responses.category.too_long:
+            return 400
+        case responses.category.not_found:
+            return 404
+
+        case responses.dateofproduction.invalid_syntax:
+            return 400
+        case responses.dateofproduction.too_long:
+            return 400
+
+        case responses.expirydate.invalid_syntax:
+            return 400
+        case responses.expirydate.too_long:
+            return 400
+        default:
+            return 500
+    }
+}
+
+export default { responses, getHTTPCode }
--- a/src/routers/abstractproduct.js
+++ b/src/routers/abstractproduct.js
@@ -1,9 +1,10 @@
 import { Router } from 'express';
 import auth from '../middlewares/auth.js';
 import AbstractProductController from '../controllers/abstractproduct.js';
-import existance from '../middlewares/existance.js';
 import multer from 'multer';
 import path from 'path';
+import tryHandler from '../response/errorHandler.js';
+import existance from '../middlewares/existance.js';

 const upload = multer(({
    dest: path.join(path.resolve(path.dirname('')), "/temp")
@@ -11,7 +12,10 @@ const upload = multer(({

 const AbstractProductRouter = new Router();

-AbstractProductRouter.post('/create', upload.single("file"), auth.authenticate, existance.groupExists, auth.userIsInGroup, AbstractProductController.create);
-AbstractProductRouter.post('/update', upload.single("file"), auth.authenticate, existance.groupExists, auth.userIsInGroup, existance.abstractProductExists, AbstractProductController.update);
+AbstractProductRouter.post('/create', upload.single("file"), tryHandler(auth.authenticate), tryHandler(auth.userIsInGroup), tryHandler(AbstractProductController.create));
+AbstractProductRouter.post('/update', upload.single("file"), tryHandler(auth.authenticate), tryHandler(auth.userIsInGroup), tryHandler(existance.localIdExists), tryHandler(AbstractProductController.update));
+AbstractProductRouter.get('/:groupId/:localId', tryHandler(auth.authenticate), tryHandler(auth.userIsInGroup), tryHandler(existance.localIdExists), tryHandler(AbstractProductController.getById));
+AbstractProductRouter.get('/getImage/:groupId/:localId', tryHandler(auth.authenticate), tryHandler(auth.userIsInGroup), tryHandler(existance.localIdExists), tryHandler(AbstractProductController.getImage));
+AbstractProductRouter.delete('/:groupId/:localId', tryHandler(auth.authenticate), tryHandler(auth.userIsInGroup), tryHandler(existance.localIdExists), tryHandler(AbstractProductController.delete));

 export default AbstractProductRouter;
--- a/src/routers/category.js
+++ b/src/routers/category.js
@@ -1,11 +1,14 @@
 import { Router } from 'express';
 import auth from '../middlewares/auth.js';
-import existance from '../middlewares/existance.js';
 import CategoryController from '../controllers/category.js';
+import tryHandler from '../response/errorHandler.js';
+import existance from '../middlewares/existance.js';

 const CategoryRouter = new Router();

-CategoryRouter.post('/create', auth.authenticate, existance.groupExists, existance.categoryNameDoesntExist, CategoryController.create);
-CategoryRouter.post('/update', auth.authenticate, existance.groupExists, existance.categoryExists, CategoryController.update);
+CategoryRouter.post('/create', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(CategoryController.create));
+CategoryRouter.post('/update', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(existance.localIdExists), tryHandler(CategoryController.update));
+CategoryRouter.get('/:groupId/:localId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(existance.localIdExists), tryHandler(CategoryController.getByLocalId));
+CategoryRouter.delete('/:groupId/:localId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(existance.localIdExists), tryHandler(CategoryController.delete));

 export default CategoryRouter;
--- a/src/routers/group.js
+++ b/src/routers/group.js
@@ -1,12 +1,19 @@
 import { Router } from 'express';
 import auth from '../middlewares/auth.js';
 import GroupController from '../controllers/group.js';
+import tryHandler from '../response/errorHandler.js';
 import existance from '../middlewares/existance.js';

 const GroupRouter = new Router();

-GroupRouter.post('/create/:groupName', auth.authenticate, existance.groupNameDoesntExist, GroupController.create);
-GroupRouter.post('/join/:groupId', auth.authenticate, existance.groupExists, auth.requirePassword, auth.checkGroupPassword, GroupController.join);
-GroupRouter.post('/password/:groupId', auth.authenticate, existance.groupExists, auth.authorizeGroupOwner, auth.requirePassword, GroupController.updatePassword);
-
+GroupRouter.post('/create/:groupName', tryHandler(auth.authenticate), tryHandler(GroupController.create));
+GroupRouter.post('/join/:groupId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.requirePassword), tryHandler(auth.checkGroupPassword), tryHandler(GroupController.join));
+GroupRouter.get('/leave/:groupId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(GroupController.leave));
+GroupRouter.post('/password/:groupId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.authorizeGroupOwner), tryHandler(auth.requirePassword), tryHandler(GroupController.updatePassword));
+GroupRouter.get('/byName/:groupName', tryHandler(auth.authenticate), tryHandler(existance.groupNameExists), tryHandler(GroupController.getByName));
+GroupRouter.get('/byId/:groupId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(GroupController.getById));
+GroupRouter.get('/getUsers/:groupId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(GroupController.getUsersInGroup));
+GroupRouter.get('/adminId/:groupId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(GroupController.getAdminId));
+GroupRouter.post('/rename/:groupId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.authorizeGroupOwner), tryHandler(GroupController.rename));
+GroupRouter.post('/transferOwnership/:groupId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.authorizeGroupOwner), tryHandler(GroupController.transferOwnership));
 export default GroupRouter;
--- a/src/routers/product.js
+++ b/src/routers/product.js
@@ -1,11 +1,14 @@
 import { Router } from 'express';
 import auth from '../middlewares/auth.js';
 import ProductController from '../controllers/product.js'
+import tryHandler from '../response/errorHandler.js';
 import existance from '../middlewares/existance.js';

 const ProductRouter = new Router();

-ProductRouter.post('/create', auth.authenticate, existance.groupExists, auth.userIsInGroup, ProductController.create);
-ProductRouter.post('/update', auth.authenticate, existance.groupExists, auth.userIsInGroup, existance.productExists, ProductController.update);
+ProductRouter.post('/create', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(auth.userIsInGroup), tryHandler(ProductController.create));
+ProductRouter.post('/update', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(existance.localIdExists), tryHandler(auth.userIsInGroup), tryHandler(ProductController.update));
+ProductRouter.get('/:groupId/:localId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(existance.localIdExists), tryHandler(auth.userIsInGroup), tryHandler(ProductController.getByLocalId))
+ProductRouter.delete('/:groupId/:localId', tryHandler(auth.authenticate), tryHandler(existance.groupExists), tryHandler(existance.localIdExists), tryHandler(auth.userIsInGroup), tryHandler(ProductController.delete))

 export default ProductRouter;
--- a/src/routers/user.js
+++ b/src/routers/user.js
@@ -1,12 +1,17 @@
 import { Router } from 'express';
 import auth from '../middlewares/auth.js';
-import existance from '../middlewares/existance.js';
 import UserController from '../controllers/user.js';
+import tryHandler from '../response/errorHandler.js';

 const UserRouter = new Router();

-UserRouter.post('/register', auth.requireUsername, auth.requirePassword, existance.usernameDoesntExist, UserController.register);
-UserRouter.post('/login', auth.requireUsername, auth.requirePassword, existance.usernameExists, UserController.login);
-UserRouter.get('/synchronize/:groupId', auth.authenticate, existance.groupExists, auth.userIsInGroup, UserController.synchronize);
+UserRouter.post('/register', tryHandler(auth.requireUsername), tryHandler(auth.requirePassword), tryHandler(UserController.register));
+UserRouter.post('/login', tryHandler(auth.requireUsername), tryHandler(auth.requirePassword), tryHandler(UserController.login));
+UserRouter.get('/synchronize/:groupId', tryHandler(auth.authenticate), tryHandler(auth.userIsInGroup), tryHandler(UserController.synchronize));
+UserRouter.post('/changeUsername', tryHandler(auth.authenticate), tryHandler(auth.requireUsername), tryHandler(UserController.changeUsername));
+UserRouter.post('/changePassword', tryHandler(auth.authenticate), tryHandler(auth.requirePassword), tryHandler(UserController.changePassword));
+UserRouter.get('/myGroups', tryHandler(auth.authenticate), tryHandler(UserController.getAllGroupsForUser));
+//Maybe I should add a middleware like "auth.usersShareGroups" 
+UserRouter.get('/byId/:userId', tryHandler(auth.authenticate), tryHandler(UserController.getById))

 export default UserRouter;
--- a/src/services/abstractproduct.js
+++ b/src/services/abstractproduct.js
@@ -1,12 +1,14 @@
+import ProductService from './product.js';
 import db from '../db.js';
-import statuses from '../utils/status.js';
 import errorHandler from '../utils/pgerrorhandler.js';
+import responses from '../response/responseCodes.js';
+import customError from '../response/customError.js';

 class AbstractProductService {
    async create(groupid, localid, barcode, name, net_weight, image_filename, category, unit) {
        await db.query("INSERT INTO abstract_products (group_id, local_id, barcode, name, net_weight, image_filename, category, unit) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)", [groupid, localid, barcode, name, net_weight, image_filename, category, unit])
            .catch((e) => {
-                errorHandler(e, "abstract product")
+                errorHandler(e, "abstractproduct")
            });
    }

@@ -20,21 +22,21 @@ class AbstractProductService {
    async updateName(groupId, localId, name) {
        await db.query("UPDATE abstract_products SET name = $1 WHERE group_id = $2 AND local_id = $3", [name, groupId, localId])
            .catch((e) => {
-                errorHandler(e, "name")
+                errorHandler(e, "abstractproductname")
            });
    }

    async updateNetWeight(groupId, localId, net_weight) {
-        await db.query("UPDATE abstract_products SET net_weight = $1 WHERE group_id = $2 AND local_id = $3", [net_weight, groupId, localId]
+        await db.query("UPDATE abstract_products SET net_weight = $1 WHERE group_id = $2 AND local_id = $3", [net_weight, groupId, localId])
            .catch((e) => {
-                errorHandler(e, "net weight")
-            }));
+                errorHandler(e, "netweight")
+            });
    }

    async updateImageFilename(groupId, localId, image_filename) {
        await db.query("UPDATE abstract_products SET image_filename = $1 WHERE group_id = $2 AND local_id = $3", [image_filename, groupId, localId])
            .catch((e) => {
-                errorHandler(e, "image filename")
+                errorHandler(e, "imagehash")
            });
    }

@@ -54,7 +56,7 @@ class AbstractProductService {

    async getAll(groupId) {
        let result = (await db.query("SELECT local_id, barcode, name, net_weight, image_filename, category, unit FROM abstract_products WHERE group_id = $1", [groupId])).rows;
-        if (!result) return statuses.not_found;
+        // if (!result) throw new customError("getAll abstract products not found", responses.responses.abstractproducts.not_found)
        return result;
    }

@@ -63,6 +65,25 @@ class AbstractProductService {
        if (!result) return false;
        return true;
    }
+
+    async getByLocalId(groupId, localId) {
+        let result = (await db.query("SELECT * FROM abstract_products WHERE group_id = $1 AND local_id = $2", [groupId, localId]))
+        if (result.rowCount == 0) throw new customError(`Abstract product not found`, responses.responses.abstractproducts.not_found)
+        return result.rows[0]
+    }
+
+    async getAllFromCategory(groupId, categoryId) {
+        let result = (await db.query("SELECT * FROM abstract_products WHERE group_id = $1 AND category = $2", [groupId, categoryId]));
+        return result.rows
+    }
+
+    async delete(groupId, localId) {
+        let productsOfAbstractProduct = await ProductService.getByAbstractProductID(groupId, localId);
+        productsOfAbstractProduct.forEach(async (product) => {
+            await ProductService.delete(product.id)
+        });
+        await db.query("DELETE FROM abstract_products WHERE group_id = $1 AND local_id = $2", [groupId, localId])
+    }
 };

 export default new AbstractProductService();
--- a/src/services/category.js
+++ b/src/services/category.js
@@ -1,5 +1,9 @@
+import ProductService from "./product.js";
+
 import db from '../db.js';
-import statuses from '../utils/status.js';
+import customError from '../response/customError.js';
+import responseCodes from '../response/responseCodes.js';
+import AbstractProductService from "./abstractproduct.js";

 class CategoryService {
    async create(groupId, categoryId, name) {
@@ -11,16 +15,31 @@ class CategoryService {
    }

    async getById(groupId, localId) {
-        let result = (await db.query("SELECT * FROM categories WHERE group_id = $1 AND local_id = $2", [groupId, localId]))
-        if (result.rowCount == 0) return statuses.not_found;
+        let result = (await db.query("SELECT * FROM categories WHERE group_id = $1 AND local_id = $2", [groupId, localId]));
+        if (result.rowCount == 0) throw new customError(`getById categorirs not found`, responseCodes.responses.category.not_found)
        return result.rows[0];
    }

    async getByName(groupId, localId, name) {
        let result = (await db.query("SELECT * FROM categories WHERE group_id = $1 AND local_id = $2 AND name = $3", [groupId, localId, name]));
-        if (result.rowCount == 0) return statuses.not_found;
+        if (result.rowCount == 0) throw new customError(`getByName categories not found`, responseCodes.responses.category.not_found)
        return result.rows[0];
    }
+
+    async getAll(groupId) {
+        let result = (await db.query("SELECT group_id, local_id, name FROM categories WHERE group_id = $1", [groupId])).rows
+        return result
+    }
+
+
+    async delete(groupId, localId) {
+        let abstractProductInCategory = await AbstractProductService.getAllFromCategory(groupId, localId);
+        abstractProductInCategory.forEach(async (abstractProduct) => {
+            await AbstractProductService.delete(groupId, abstractProduct.local_id)
+        });
+
+        await db.query("DELETE FROM categories WHERE group_id = $1 AND local_id = $2", [groupId, localId]);
+    }
 }

 export default new CategoryService();
--- a/src/services/group.js
+++ b/src/services/group.js
@@ -1,17 +1,18 @@
 import db from '../db.js';
+import customError from '../response/customError.js';
+import responseCodes from '../response/responseCodes.js';
 import errorHandler from '../utils/pgerrorhandler.js';
-import status from '../utils/status.js';

 class GroupService {
    async create(name, creatorId) {
-        let res = await db.query("INSERT INTO groups (name, admin_id) VALUES ($1, $2) RETURNING ID", [name, creatorId]).catch(errorHandler);
+        let res = await db.query("INSERT INTO groups (name, admin_id) VALUES ($1, $2) RETURNING ID", [name, creatorId]).catch((e) => errorHandler(e, "groups"));

        return res.rows[0];
    }

    async getById(id) {
        let res = (await db.query("SELECT * FROM groups WHERE id = $1", [id]));
-        if (res.rowCount == 0) return status.not_found;
+        if (res.rowCount == 0) throw new customError(`getById group not found`, responseCodes.responses.groups.id_not_found);
        return res.rows[0];
    }

@@ -28,7 +29,21 @@ class GroupService {
    }

    async getByName(name) {
-        return (await db.query("SELECT * FROM groups WHERE name = $1", [name])).rows[0];
+        let res = (await db.query("SELECT id FROM groups WHERE name = $1", [name]));
+        if (res.rowCount == 0) throw new customError(`getByName group not found`, responseCodes.responses.groups.name_not_found);
+        return res.rows[0];
+    }
+
+    async getUsersInGroup(groupId) {
+        return (await db.query("SELECT id FROM users WHERE $1 = ANY(groups)", [groupId])).rows.map((group) => group.id)
+    }
+
+    async rename(groupId, newName) {
+        await db.query("UPDATE groups SET name = $1 WHERE id = $2", [newName, groupId]).catch((e) => errorHandler(e, "groups"));;
+    }
+
+    async transferOwnership(groupId, userId) {
+        await db.query("UPDATE groups SET admin_id = $1 WHERE id = $2", [userId, groupId])
    }
 };

--- a/src/services/product.js
+++ b/src/services/product.js
@@ -1,19 +1,20 @@
 import db from '../db.js';
-import statuses from '../utils/status.js';
 import errorHandler from '../utils/pgerrorhandler.js';
+import customError from '../response/customError.js';
+import responseCodes from '../response/responseCodes.js';

 class ProductService {
    async create(groupid, localid, abstract_product_id, amount, date_of_production, expiry_date) {
-        await db.query("INSERT INTO products (group_id, local_id, abstract_product_id, amount, date_of_production, expiry_date) VALUES ($1, $2, $3, $4, $5, $6)", [groupid, localid, abstract_product_id, amount, date_of_production, expiry_date])
+        await db.query("INSERT INTO products (group_id, local_id, abstract_product_id, amount, date_of_production, expiry_date) VALUES ($1, $2, $3, $4, to_timestamp($5)::date, to_timestamp($6)::date)", [groupid, localid, abstract_product_id, amount, date_of_production, expiry_date])
            .catch((e) => {
-                errorHandler(e, "Abstract Product")
+                errorHandler(e, "product")
            });
    }

    async updateAbstractProductId(groupId, localId, abstract_product_id) {
        await db.query("UPDATE products SET abstract_product_id = $1 WHERE group_id = $2 AND local_id = $3", [abstract_product_id, groupId, localId])
            .catch((e) => {
-                errorHandler(e, "abstract product id")
+                errorHandler(e, "abstractproductid")
            });

    }
@@ -26,22 +27,22 @@ class ProductService {
    }

    async updateDateOfProduction(groupId, localId, date_of_production) {
-        await db.query("UPDATE products SET date_of_production = $1 WHERE group_id = $2 AND local_id = $3", [date_of_production, groupId, localId])
+        await db.query("UPDATE products SET date_of_production = to_timestamp($1)::date WHERE group_id = $2 AND local_id = $3", [date_of_production, groupId, localId])
            .catch((e) => {
-                errorHandler(e, "date of production")
+                errorHandler(e, "dateofproduction")
            });
    }

    async updateExpiryDate(groupId, localId, expiry_date) {
-        await db.query("UPDATE products SET expiry_date = $1 WHERE group_id = $2 AND local_id = $3", [expiry_date, groupId, localId])
+        await db.query("UPDATE products SET expiry_date = to_timestamp($1)::date WHERE group_id = $2 AND local_id = $3", [expiry_date, groupId, localId])
            .catch((e) => {
-                errorHandler(e, "expiry date")
+                errorHandler(e, "expirydate")
            });
    }

    async getAll(groupId) {
        let result = (await db.query("SELECT local_id, abstract_product_id, amount, date_of_production, expiry_date FROM products WHERE group_id = $1", [groupId])).rows;
-        if (!result) return statuses.not_found;
+        // if (!result) throw new customError(`getAll product not found`, responseCodes.responses.products.not_found);
        return result;
    }

@@ -50,6 +51,21 @@ class ProductService {
        if (!result) return false;
        return true;
    }
+
+    async getByLocalId(groupId, localId) {
+        let result = (await db.query("SELECT * FROM products WHERE group_id = $1 AND local_id = $2", [groupId, localId]));
+        if (result.rowCount == 0) throw new customError(`getByLocalId product not found`, responseCodes.responses.products.not_found);
+        return result.rows[0];
+    }
+
+    async getByAbstractProductID(groupId, abstractProductID) {
+        let result = (await db.query("SELECT * FROM products WHERE group_id = $1 AND abstract_product_id = $2", [groupId, abstractProductID]))
+        return result.rows
+    }
+
+    async delete(ID) {
+        await db.query("DELETE FROM products WHERE id = $1", [ID])
+    }
 };

 export default new ProductService();
--- a/src/services/user.js
+++ b/src/services/user.js
@@ -1,23 +1,28 @@
 import db from '../db.js'
-import statuses from '../utils/status.js';
+import customError from '../response/customError.js';
+import responseCodes from '../response/responseCodes.js';
 import bcrypt from 'bcrypt';
+import errorHandler from '../utils/pgerrorhandler.js';

 class UserService {
    async create(username, password) {
-        await db.query("INSERT INTO users (username, password) VALUES ($1, $2)", [username, bcrypt.hashSync(password, 12)]).catch((e) => {
+        let result = (await db.query("INSERT INTO users (username, password) VALUES ($1, $2) RETURNING id", [username, bcrypt.hashSync(password, 12)]).catch((e) => {
            errorHandler(e, "user");
-        })
-        return statuses.ok;
+        })).rows[0].id
+
+        return result
    }

    async getByUsername(username) {
-        let user = (await db.query("SELECT * FROM Users WHERE username = $1", [username])).rows;
-        if (user == undefined) return statuses.not_found;
-        return (user[0]);
+        let user = (await db.query("SELECT * FROM Users WHERE username = $1", [username]));
+        if (user.rowCount == 0) throw new customError(`getByUsername user not found`, responseCodes.responses.usernames.not_found);
+        return user.rows[0];
    }

    async getAll() {
-        return (await db.query("SELECT * FROM Users")).rows;
+        let res = await db.query("SELECT * FROM Users");
+        if (res.rowCount == 0) throw new customError(`getAll user not found`, responseCodes.responses.usernames.not_found);
+        return res.rows[0]
    }

    async isInGroup(userId, groupId) {
@@ -25,9 +30,30 @@ class UserService {
    }

    async joinGroup(userId, groupId) {
-        if (await (this.isInGroup(userId, groupId))) return statuses.duplicate;
-        await db.query("UPDATE Users SET groups = array_append(groups, $1::integer) WHERE ID = $2", [groupId, userId]);
-        return statuses.ok;
+        if (await (this.isInGroup(userId, groupId))) throw new customError(`joinGroup user already in group`, responseCodes.responses.user.already_in_group);
+        await db.query("UPDATE users SET groups = array_append(groups, $1::integer) WHERE ID = $2", [groupId, userId]);
+    }
+
+    async leaveGroup(userId, groupId) {
+        await db.query("UPDATE users SET groups = array_remove(groups, $1::integer) WHERE ID = $2", [groupId, userId]);
+    }
+
+    async changeUsername(userId, username) {
+        await db.query("UPDATE users SET username = $1 WHERE id = $2", [username, userId]).catch(e => errorHandler(e, "user"));
+    }
+
+    async changePassword(userId, password) {
+        await db.query("UPDATE users SET password = $1 WHERE id = $2", [bcrypt.hashSync(password, 12), userId])
+    }
+
+    async getAllGroupsForUser(userId) {
+        return (await db.query("SELECT groups FROM users WHERE id = $1", [userId])).rows[0].groups
+    }
+
+    async getById(userId) {
+        let res = (await db.query("SELECT * FROM users WHERE id = $1", [userId]))
+        if (res.rowCount == 0) throw new customError(`getById no user found`, responseCodes.responses.user.not_found)
+        return res.rows[0]
    }
 }

--- a/src/utils/jwt.js
+++ b/src/utils/jwt.js
@@ -6,4 +6,8 @@ const genToken = (login) => {
    return jwt.sign(payload, config.secret, { expiresIn: "7d" });
 };

-export default genToken;
+const getUserIdFromToken = (token) => {
+    return jwt.decode(token).login.id;
+}
+
+export default { genToken, getUserIdFromToken };
--- a/src/utils/log.js
+++ b/src/utils/log.js
@@ -2,23 +2,23 @@ import config from '../../config.json' with {type: "json"};

 const debug = (text) => {
    if (config.debug) console.debug(`[D] [${Date()}]: ${text}`);
-}
+};

 const info = (text) => {
    console.log(`[I] [${Date()}]: ${text}`);
-}
+};

 const error = (text) => {
    console.error(`[E] [${Date()}]: ${text}`);
-}
+};

 const warn = (text) => {
    console.warn(`[W] [${Date()}]: ${text}`);
-}
+};

 const unknownError = (text) => {
    error(text);
    return "Unknown server error. Please, report to the developer";
-}
+};

 export default { debug, info, error, warn, unknownError };
--- a/src/utils/notify.js
+++ b/src/utils/notify.js
@@ -0,0 +1,28 @@
+import clients from '../index.js';
+import jwt from 'jsonwebtoken';
+
+import config from '../../config.json' with {type: "json"};
+import log from './log.js';
+
+const notify = (token, groupId, action, item, data) => {
+    let login = jwt.decode(token, config.secret).login
+    let userIdCurrent = login.id
+
+    let payload = {
+        action,
+        item,
+        groupId,
+        data
+    }
+
+    clients.forEach(client => {
+        if (client.currentGroup == groupId) {
+            let userIdFromToken = jwt.decode(client.token, config.secret).login.id
+            if (userIdCurrent == userIdFromToken) return;
+            log.debug(`Sending user with ID ${userIdCurrent} packet "${JSON.stringify(payload)}"`)
+            client.socket.send(JSON.stringify(payload))
+        }
+    });
+}
+
+export default notify;
--- a/src/utils/pgerrorhandler.js
+++ b/src/utils/pgerrorhandler.js
@@ -1,28 +1,17 @@
-import statuses from "./status.js";
+import customError from "../response/customError.js";
+import responseCodes from "../response/responseCodes.js";

 const errorHandler = (e, obj) => {
    switch (e.code) {
        case '23505':
-            throw {
-                status: statuses.duplicate,
-                message: `Such ${obj} already exists`
-            };
+            throw new customError(`Duplicate ${obj}`, responseCodes.responses[obj].duplicate)
        case '22007':
-            throw {
-                status: statuses.invalid_syntax,
-                message: `Invalid syntax in ${obj}`
-            };
+            throw new customError(`Invalid syntax ${obj}`, responseCodes.responses.general.invalid_syntax)
        case '22001':
-            throw {
-                status: statuses.invalid_syntax,
-                message: `Value too long (${obj})`
-            };
+            throw new customError(`Value too long ${obj}`, responseCodes.responses[obj].too_long)
        default:
-            throw {
-                status: statuses.unknown,
-                message: `Unknown error. Please, report to the developer`,
-                original: e
-            };
+            console.log(e)
+            throw new customError(`Unknown error ${obj}`, responseCodes.responses.general.unknown)
    };
 };

--- a/src/utils/status.js
+++ b/src/utils/status.js
@@ -1,9 +0,0 @@
-const statuses = {
-    ok: "ok",
-    duplicate: "duplicate",
-    not_found: "not found",
-    invalid_syntax: "invalid syntax",
-    unknown: "unknown"
-};
-
-export default statuses;
--- a/src/utils/translate.js
+++ b/src/utils/translate.js
@@ -0,0 +1,9 @@
+import fs from 'fs';
+
+const translate = (language, code) => {
+    if (!language) language = "en-US"
+    if (!code) code = "unknown"
+    return JSON.parse(fs.readFileSync(`./messages/${language}/msgs.json`).toString())[code];
+}
+
+export default translate
Author	SHA1	Message	Date
leca	010475bca2	added endpoint for group leaving	2024-11-18 13:54:05 +03:00
leca	63aaa30d92	added endpoint for group ownership transfer	2024-11-18 13:34:39 +03:00
leca	947dc720a5	added rename endpoint for groups	2024-11-18 12:32:11 +03:00
leca	7d98ba89c5	fixed wrong action sequence	2024-11-14 03:41:34 +03:00
leca	9988cedbc4	forgot to import	2024-11-13 23:25:58 +03:00
leca	4f5cd78eb0	debug info	2024-11-13 23:09:50 +03:00
leca	0e4cc6507b	fixes	2024-11-13 23:08:50 +03:00
leca	1e6975fa13	stupid me	2024-11-13 20:07:59 +03:00
leca	05652f1cfb	added persistent volumes for postgresql db	2024-11-13 19:41:30 +03:00
leca	3c7e88d389	deleting old image of an abstract product on its update	2024-11-13 19:38:46 +03:00
leca	eb0c8ac99d	deleting abstract product image on its deletion	2024-11-13 19:36:55 +03:00
leca	2be40b6f34	renamed keys in json websocket send on synchronization, upgrading ws to wss	2024-11-13 11:44:37 +03:00
leca	c4f0d65f4f	renamed keys in json websocket send on synchronization	2024-11-13 11:38:32 +03:00
leca	66bfba3b8e	websockets	2024-11-12 21:22:13 +03:00
leca	0608ccda6d	added /status endpoint	2024-11-12 12:31:56 +03:00
leca	c39e8c9790	added endpoints for object deletion	2024-11-11 01:11:24 +03:00
leca	77d95824f3	fixed wrong date inserting	2024-11-09 03:55:41 +03:00
leca	757f5c13a5	fixes	2024-11-07 23:54:51 +03:00
leca	7a89ce2840	added endpoints for retreiving info about items	2024-11-07 21:44:10 +03:00
leca	5853023069	now /api/user/synchronize calculates hashes for items	2024-11-07 03:30:27 +03:00
leca	1a557fd530	fixed /api/user/synchronize	2024-11-07 03:11:07 +03:00
leca	646bc77aa0	shitty naming 2	2024-11-06 16:22:37 +03:00
leca	1099738ac3	shitty naming	2024-11-06 16:19:20 +03:00
leca	66fff16d30	Typescript's better.	2024-11-06 03:48:45 +03:00
leca	96133b7733	added test if there's no group admin	2024-11-04 04:42:04 +03:00
leca	693a0980d9	added tesf for NaN in existance.groupExists	2024-11-04 04:30:29 +03:00
leca	69c2255614	now sending userid on login and register	2024-11-03 02:41:13 +03:00
leca	0b32306f84	added new endpoint	2024-11-03 00:01:54 +03:00
leca	3858a3c06e	added new endpoint	2024-11-02 22:32:35 +03:00
leca	c34cd7f809	added new endpoint	2024-11-02 22:15:24 +03:00
leca	317fba81aa	added 2 new endpoints	2024-11-02 21:51:29 +03:00
leca	07ffeb8de4	fixed wrong variable name	2024-11-02 12:49:52 +03:00
leca	c869f7c6ac	sending new group id in response to group creation	2024-11-02 12:45:36 +03:00
leca	02b1a572d1	added endpoints for changing password and username	2024-11-02 01:36:25 +03:00
leca	afa1edeb8d	fixed sending int	2024-10-31 12:37:17 +03:00
leca	f6e25d606a	fix property access	2024-10-31 10:10:27 +03:00
leca	6adb48aeab	check for group name	2024-10-31 10:06:49 +03:00
leca	d809abd17b	mistake	2024-10-31 09:50:17 +03:00
leca	9cd1debd4a	added new endpoint	2024-10-31 09:00:44 +03:00
leca	d4233c72f5	translated error	2024-10-31 08:29:56 +03:00
leca	c950882e0e	right container start sequence	2024-10-31 07:52:37 +03:00
leca	ad5d7c4547	added config.json to gitignore	2024-10-31 07:48:17 +03:00
leca	c9e679ec4c	tested and fixed	2024-10-31 07:47:27 +03:00
leca	7a2ab7dd5b	Centralized errors and added their translations. Didn't test	2024-10-31 06:33:57 +03:00
leca	47e90764e7	fixed fs.renameSync & docker issue	2024-10-28 22:04:50 +03:00
leca	155faa6731	move config to sample	2024-10-28 20:04:00 +03:00
leca	f2945fc92d	docker deployment	2024-10-28 19:35:35 +03:00