No longer generate image thumbnails manually

Delete manually calculated image thumbnails

src/org/thoughtcrime/securesms/database/AttachmentDatabase.java

@@ -642,12 +642,10 @@ public class AttachmentDatabase extends Database {
         return null;
       }
 
-      ThumbnailData data;
+      ThumbnailData data = null;
 
       if (MediaUtil.isVideoType(attachment.getContentType())) {
         data = generateVideoThumbnail(attachmentId);
-      } else{
-        data = MediaUtil.generateThumbnail(context, attachment.getContentType(), attachment.getDataUri());
       }
 
       if (data == null) {

src/org/thoughtcrime/securesms/database/helpers/SQLCipherOpenHelper.java

@@ -1,7 +1,9 @@
 package org.thoughtcrime.securesms.database.helpers;
 
 
+import android.content.ContentValues;
 import android.content.Context;
+import android.database.Cursor;
 import android.support.annotation.NonNull;
 import android.util.Log;
 
@@ -29,6 +31,8 @@ import org.thoughtcrime.securesms.jobs.RefreshPreKeysJob;
 import org.thoughtcrime.securesms.service.KeyCachingService;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
 
+import java.io.File;
+
 public class SQLCipherOpenHelper extends SQLiteOpenHelper {
 
   @SuppressWarnings("unused")
@@ -37,6 +41,7 @@ public class SQLCipherOpenHelper extends SQLiteOpenHelper {
   private static final int RECIPIENT_CALL_RINGTONE_VERSION  = 2;
   private static final int MIGRATE_PREKEYS_VERSION          = 3;
   private static final int MIGRATE_SESSIONS_VERSION         = 4;
+  private static final int NO_MORE_IMAGE_THUMBNAILS_VERSION = 5;
 
   private static final int    DATABASE_VERSION = 4;
   private static final String DATABASE_NAME    = "signal.db";
@@ -134,6 +139,28 @@ public class SQLCipherOpenHelper extends SQLiteOpenHelper {
         SessionStoreMigrationHelper.migrateSessions(context, db);
       }
 
+      if (oldVersion < NO_MORE_IMAGE_THUMBNAILS_VERSION) {
+        ContentValues update = new ContentValues();
+        update.put("thumbnail", (String)null);
+        update.put("aspect_ratio", (String)null);
+        update.put("thumbnail_random", (String)null);
+
+        try (Cursor cursor = db.query("part", new String[] {"_id", "ct", "thumbnail"}, "thumbnail IS NOT NULL", null, null, null, null)) {
+          while (cursor != null && cursor.moveToNext()) {
+            long   id          = cursor.getLong(cursor.getColumnIndexOrThrow("_id"));
+            String contentType = cursor.getString(cursor.getColumnIndexOrThrow("ct"));
+
+            if (contentType != null && !contentType.startsWith("video")) {
+              String thumbnailPath = cursor.getString(cursor.getColumnIndexOrThrow("thumbnail"));
+              File   thumbnailFile = new File(thumbnailPath);
+              thumbnailFile.delete();
+
+              db.update("part", update, "_id = ?", new String[] {String.valueOf(id)});
+            }
+          }
+        }
+      }
+
       db.setTransactionSuccessful();
     } finally {
       db.endTransaction();

src/org/thoughtcrime/securesms/util/MediaUtil.java

@@ -11,14 +11,10 @@ import android.text.TextUtils;
 import android.util.Log;
 import android.webkit.MimeTypeMap;
 
-import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.attachments.Attachment;
-import org.thoughtcrime.securesms.crypto.MasterSecret;
 import org.thoughtcrime.securesms.mms.AudioSlide;
-import org.thoughtcrime.securesms.mms.DecryptableStreamUriLoader.DecryptableUri;
 import org.thoughtcrime.securesms.mms.DocumentSlide;
 import org.thoughtcrime.securesms.mms.GifSlide;
-import org.thoughtcrime.securesms.mms.GlideApp;
 import org.thoughtcrime.securesms.mms.ImageSlide;
 import org.thoughtcrime.securesms.mms.MmsSlide;
 import org.thoughtcrime.securesms.mms.PartAuthority;
@@ -28,7 +24,6 @@ import org.thoughtcrime.securesms.providers.PersistentBlobProvider;
 
 import java.io.IOException;
 import java.io.InputStream;
-import java.util.concurrent.ExecutionException;
 
 public class MediaUtil {
 
@@ -42,42 +37,6 @@ public class MediaUtil {
   public static final String VIDEO_UNSPECIFIED = "video/*";
 
 
-  public static @Nullable ThumbnailData generateThumbnail(Context context, String contentType, Uri uri)
-      throws BitmapDecodingException
-  {
-    long   startMillis = System.currentTimeMillis();
-    ThumbnailData data = null;
-
-    if (isImageType(contentType)) {
-      data = new ThumbnailData(generateImageThumbnail(context, uri));
-    }
-
-    if (data != null) {
-      Log.w(TAG, String.format("generated thumbnail for part, %dx%d (%.3f:1) in %dms",
-                               data.getBitmap().getWidth(), data.getBitmap().getHeight(),
-                               data.getAspectRatio(), System.currentTimeMillis() - startMillis));
-    }
-
-    return data;
-  }
-
-  private static Bitmap generateImageThumbnail(Context context, Uri uri)
-      throws BitmapDecodingException
-  {
-    try {
-      int maxSize = context.getResources().getDimensionPixelSize(R.dimen.media_bubble_height);
-      return GlideApp.with(context.getApplicationContext())
-                     .asBitmap()
-                     .load(new DecryptableUri(uri))
-                     .centerCrop()
-                     .into(maxSize, maxSize)
-                     .get();
-    } catch (InterruptedException | ExecutionException e) {
-      Log.w(TAG, e);
-      throw new BitmapDecodingException(e);
-    }
-  }
-
   public static Slide getSlideForAttachment(Context context, Attachment attachment) {
     Slide slide = null;
     if (isGif(attachment.getContentType())) {