feat: force image format

app/src/main/kotlin/me/rhunk/snapenhance/download/DownloadProcessor.kt

@@ -2,6 +2,8 @@ package me.rhunk.snapenhance.download
 
 import android.annotation.SuppressLint
 import android.content.Intent
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
 import android.net.Uri
 import android.widget.Toast
 import androidx.documentfile.provider.DocumentFile
@@ -121,12 +123,31 @@ class DownloadProcessor (
         if (coroutineContext.job.isCancelled) return
 
         runCatching {
-            val fileType = FileType.fromFile(inputFile)
+            var fileType = FileType.fromFile(inputFile)
+
             if (fileType == FileType.UNKNOWN) {
                 callbackOnFailure(translation.format("failed_gallery_toast", "error" to "Unknown media type"), null)
                 return
             }
 
+            if (fileType.isImage) {
+                remoteSideContext.config.root.downloader.forceImageFormat.getNullable()?.let { format ->
+                    val bitmap = BitmapFactory.decodeFile(inputFile.absolutePath) ?: throw Exception("Failed to decode bitmap")
+                    @Suppress("DEPRECATION") val compressFormat = when (format) {
+                        "png" -> Bitmap.CompressFormat.PNG
+                        "jpg" -> Bitmap.CompressFormat.JPEG
+                        "webp" -> Bitmap.CompressFormat.WEBP
+                        else -> throw Exception("Invalid image format")
+                    }
+
+                    val outputStream = inputFile.outputStream()
+                    bitmap.compress(compressFormat, 100, outputStream)
+                    outputStream.close()
+
+                    fileType = FileType.fromFile(inputFile)
+                }
+            }
+
             val fileName = downloadObject.metadata.outputPath.substringAfterLast("/") + "." + fileType.fileExtension
 
             val outputFolder = DocumentFile.fromTreeUri(remoteSideContext.androidContext, Uri.parse(remoteSideContext.config.root.downloader.saveFolder.get()))

core/src/main/assets/lang/en_US.json

@@ -123,6 +123,10 @@
                         "name": "Merge Overlays",
                         "description": "Combines the text and the media of a Snap into a single file"
                     },
+                    "force_image_format": {
+                        "name": "Force Image Format",
+                        "description": "Forces images to be saved as a specific format"
+                    },
                     "chat_download_context_menu": {
                         "name": "Chat Download Context Menu",
                         "description": "Allows to download messages from a conversation by long pressing them"

core/src/main/kotlin/me/rhunk/snapenhance/core/config/impl/DownloaderConfig.kt

@@ -22,6 +22,9 @@ class DownloaderConfig : ConfigContainer() {
     ).apply { set(mutableListOf("append_hash", "append_date_time", "append_type", "append_username")) }
     val allowDuplicate = boolean("allow_duplicate")
     val mergeOverlays = boolean("merge_overlays") { addNotices(FeatureNotice.MAY_CAUSE_CRASHES) }
+    val forceImageFormat = unique("force_image_format", "jpg", "png", "webp") {
+        addFlags(ConfigFlag.NO_TRANSLATE)
+    }
     val chatDownloadContextMenu = boolean("chat_download_context_menu")
     val logging = multiple("logging", "started", "success", "progress", "failure").apply {
         set(mutableListOf("started", "success"))