added category

src/services/category.js

@@ -0,0 +1,26 @@
+import db from '../db.js';
+import statuses from '../utils/status.js';
+
+class CategoryService {
+    async create(groupId, categoryId, name) {
+        await db.query("INSERT INTO categories (group_id, local_id, name) VALUES ($1, $2, $3)", [groupId, categoryId, name])
+    }
+
+    async update(groupId, categoryId, name) {
+        await db.query("UPDATE categories SET name = $1 WHERE group_id = $2 AND local_id = $3", [name, groupId, categoryId]);
+    }
+
+    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;
+        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;
+        return result.rows[0];
+    }
+}
+
+export default new CategoryService();