feat: remove gmail prefix in folder structure

Author: shamim-emon

legacy/storage/src/main/java/com/fsck/k9/storage/messages/CreateFolderOperations.kt

@@ -6,12 +6,16 @@ import com.fsck.k9.mailstore.LockableDatabase
 import com.fsck.k9.mailstore.toDatabaseFolderType
 
 internal class CreateFolderOperations(private val lockableDatabase: LockableDatabase) {
+    init {
+        removeGmailPrefixFromFolders()
+    }
+
     fun createFolders(folders: List<CreateFolderInfo>) {
         lockableDatabase.execute(true) { db ->
             for (folder in folders) {
                 val folderSettings = folder.settings
                 val values = ContentValues().apply {
-                    put("name", folder.name)
+                    put("name", folder.name.replace("\\[(Gmail|Google Mail)]/".toRegex(), ""))
                     put("visible_limit", folderSettings.visibleLimit)
                     put("integrate", folderSettings.integrate)
                     put("top_group", folderSettings.inTopGroup)
@@ -28,4 +32,34 @@ internal class CreateFolderOperations(private val lockableDatabase: LockableData
             }
         }
     }
+
+    private fun removeGmailPrefixFromFolders() {
+        lockableDatabase.execute(false) { db ->
+            val cursor = db.query(
+                "folders",
+                arrayOf("id", "name"),
+                "name LIKE ? OR name LIKE ?",
+                arrayOf("%[Gmail]/%", "%[Google Mail]/%"),
+                null,
+                null,
+                null,
+            )
+
+            while (cursor.moveToNext()) {
+                val id = cursor.getLong(cursor.getColumnIndexOrThrow("id"))
+                val name = cursor.getString(cursor.getColumnIndexOrThrow("name"))
+                val updatedName = name
+                    .replace("[Gmail]/", "")
+                    .replace("[Google Mail]/", "")
+
+                val values = ContentValues().apply {
+                    put("name", updatedName)
+                }
+
+                db.update("folders", values, "id = ?", arrayOf(id.toString()))
+            }
+
+            cursor.close()
+        }
+    }
 }

legacy/storage/src/main/java/com/fsck/k9/storage/messages/K9MessageStore.kt

@@ -21,6 +21,7 @@ class K9MessageStore(
     storageFilesProvider: StorageFilesProvider,
     basicPartInfoExtractor: BasicPartInfoExtractor,
 ) : MessageStore {
+
     private val attachmentFileManager = AttachmentFileManager(storageFilesProvider)
     private val threadMessageOperations = ThreadMessageOperations()
     private val saveMessageOperations = SaveMessageOperations(