From ac5be50f2b678e987b95fce4c9461c4b2048876b Mon Sep 17 00:00:00 2001
From: leca <leca@foxarmy.org>
Date: Wed, 2 Oct 2024 01:55:46 +0300
Subject: [PATCH] image thumbnails generation

---
 .../AddProductFragment.kt                     | 11 +--------
 .../StorageFragment.kt                        |  1 +
 .../barcodescannerforemployees/Utils.kt       | 23 +++++++++++++++++++
 3 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/AddProductFragment.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/AddProductFragment.kt
index c962c08..1d4f76b 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/AddProductFragment.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/AddProductFragment.kt
@@ -1,8 +1,6 @@
 package org.foxarmy.barcodescannerforemployees
 
 import android.content.ContentValues
-import android.graphics.Bitmap
-import android.graphics.BitmapFactory
 import android.os.Build
 import android.os.Bundle
 import android.util.Log
@@ -12,7 +10,6 @@ import android.view.ViewGroup
 import android.widget.Toast
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.annotation.RequiresApi
-import androidx.core.graphics.scale
 import androidx.fragment.app.Fragment
 import androidx.navigation.fragment.findNavController
 import com.google.mlkit.vision.barcode.common.Barcode
@@ -20,7 +17,6 @@ import com.google.mlkit.vision.codescanner.GmsBarcodeScannerOptions
 import com.google.mlkit.vision.codescanner.GmsBarcodeScanning
 import org.foxarmy.barcodescannerforemployees.databinding.AddProductFragmentBinding
 import java.io.File
-import java.io.FileOutputStream
 import java.nio.file.Files
 import java.nio.file.StandardCopyOption
 
@@ -51,12 +47,7 @@ class AddProductFragment : Fragment() {
             val tempfile = File(requireContext().filesDir, "image.png")
             val imageContent = tempfile.inputStream().readBytes()
             val imageHash = imageContent.toString(Charsets.UTF_8).md5()
-            val thumbnailsDir = File(requireContext().cacheDir, "thumbnails")
-            thumbnailsDir.mkdirs()
-            val thumbnailFile = File(thumbnailsDir, "$imageHash.webp")
-            var img = BitmapFactory.decodeByteArray(imageContent, 0, imageContent.size)
-            img = img.scale(img.width/4,img.height/4)
-            img.compress(Bitmap.CompressFormat.WEBP_LOSSY, 25, FileOutputStream(thumbnailFile))
+            generateThumbnailForImage(context!!, imageHash)
 
             pictureFile = File(picturesPath, "$imageHash.png")
             Files.move(tempfile.toPath(), pictureFile.toPath(), StandardCopyOption.REPLACE_EXISTING)
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/StorageFragment.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/StorageFragment.kt
index fcb5c13..bfade28 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/StorageFragment.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/StorageFragment.kt
@@ -42,6 +42,7 @@ class StorageFragment : Fragment() {
                 val netWeight = getDouble(getColumnIndexOrThrow(ProductContract.ProductEntry.PRODUCT_NET_WEIGHT))
                 val productImageHash = getString(getColumnIndexOrThrow(ProductContract.ProductEntry.IMAGE_FILENAME))
 
+                generateThumbnailForImage(context!!, productImageHash)
 
                 val abstractProduct = AbstractProductView(
                     requireActivity(),
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/Utils.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/Utils.kt
index fdbaa01..28bc288 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/Utils.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/Utils.kt
@@ -1,16 +1,39 @@
 package org.foxarmy.barcodescannerforemployees
 
 import android.app.Activity
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
 import android.net.Uri
+import android.os.Build
+import androidx.annotation.RequiresApi
 import androidx.core.content.FileProvider
+import androidx.core.graphics.scale
 import com.google.firebase.components.BuildConfig
 import java.io.File
+import java.io.FileOutputStream
 import java.security.MessageDigest
 
 fun getImageUri(activity: Activity, imageFile: File): Uri? {
     return FileProvider.getUriForFile(activity, BuildConfig.APPLICATION_ID + "." + activity.localClassName + ".provider", imageFile)
 }
 
+@RequiresApi(Build.VERSION_CODES.R)
+fun generateThumbnailForImage(context: Context, imageHash: String) {
+    val thumbnailsDir = File(context.cacheDir, "thumbnails")
+    thumbnailsDir.mkdirs()
+    val picturesDir = File(context.filesDir, "pictures")
+    picturesDir.mkdirs()
+    val thumbnailFile = File(thumbnailsDir, "$imageHash.webp")
+    if (thumbnailFile.exists()) return
+
+    val imageFile = File(picturesDir, "$imageHash.png")
+    val imageContent = imageFile.inputStream().readBytes()
+    var img = BitmapFactory.decodeByteArray(imageContent, 0, imageContent.size)
+    img = img.scale(img.width/4,img.height/4)
+    img.compress(Bitmap.CompressFormat.WEBP_LOSSY, 25, FileOutputStream(thumbnailFile))
+}
+
 @OptIn(ExperimentalStdlibApi::class)
 fun String.md5(): String {
     val md = MessageDigest.getInstance("MD5")