Moved cleaning up image cache to daily job

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -134,7 +134,6 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
     enum ViewType {UNIFIED, FOLDER, THREAD, SEARCH}
 
     private static final float LOW_LIGHT = 0.6f;
-    private static final long CACHE_IMAGE_DURATION = 3 * 24 * 3600 * 1000L;
 
     private static DateFormat df = SimpleDateFormat.getDateTimeInstance(SimpleDateFormat.LONG, SimpleDateFormat.LONG);
 
@@ -786,17 +785,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
                         // Get cache folder
                         File dir = new File(context.getCacheDir(), "images");
-                        dir.mkdir();
-
-                        // Cleanup cache
-                        long now = new Date().getTime();
-                        File[] images = dir.listFiles();
-                        if (images != null)
-                            for (File image : images)
-                                if (image.isFile() && image.lastModified() + CACHE_IMAGE_DURATION < now) {
-                                    Log.i(Helper.TAG, "Deleting from image cache " + image.getName());
-                                    image.delete();
-                                }
+                        if (!dir.exists())
+                            dir.mkdir();
 
                         InputStream is = null;
                         FileOutputStream os = null;

app/src/main/java/eu/faircode/email/EntityAttachment.java

@@ -79,7 +79,8 @@ public class EntityAttachment {
 
     static File getFile(Context context, Long id) {
         File dir = new File(context.getFilesDir(), "attachments");
-        dir.mkdir();
+        if (!dir.exists())
+            dir.mkdir();
         return new File(dir, Long.toString(id));
     }
 

app/src/main/java/eu/faircode/email/EntityMessage.java

@@ -153,7 +153,8 @@ public class EntityMessage implements Serializable {
 
     static File getFile(Context context, Long id) {
         File dir = new File(context.getFilesDir(), "messages");
-        dir.mkdir();
+        if (!dir.exists())
+            dir.mkdir();
         return new File(dir, id.toString());
     }
 

app/src/main/java/eu/faircode/email/JobDaily.java

@@ -37,6 +37,7 @@ public class JobDaily extends JobService {
     private ExecutorService executor = Executors.newSingleThreadExecutor(Helper.backgroundThreadFactory);
 
     private static final long CLEANUP_INTERVAL = 4 * 3600 * 1000L; // milliseconds
+    private static final long CACHE_IMAGE_DURATION = 3 * 24 * 3600 * 1000L;
 
     public static void schedule(Context context) {
         Log.i(Helper.TAG, "Scheduling daily job");
@@ -121,6 +122,18 @@ public class JobDaily extends JobService {
                         }
                     }
 
+            // Cleanup cached images
+            Log.i(Helper.TAG, "Cleanup cached image files");
+            long now = new Date().getTime();
+            File[] images = new File(context.getCacheDir(), "images").listFiles();
+            if (images != null)
+                for (File file : images)
+                    if (file.isFile() && file.lastModified() + CACHE_IMAGE_DURATION < now) {
+                        Log.i(Helper.TAG, "Deleting cached image=" + file.getName());
+                        if (!file.delete())
+                            Log.w(Helper.TAG, "Error deleting " + file);
+                    }
+
             Log.i(Helper.TAG, "Cleanup log");
             long before = new Date().getTime() - 24 * 3600 * 1000L;
             int logs = db.log().deleteLogs(before);