Add media constraints for arbitrary file types

Fixes #6573
// FREEBIE

src/org/thoughtcrime/securesms/mms/MediaConstraints.java

@@ -36,13 +36,15 @@ public abstract class MediaConstraints {
 
   public abstract int getAudioMaxSize();
 
+  public abstract int getDocumentMaxSize();
+
   public boolean isSatisfied(@NonNull Context context, @NonNull MasterSecret masterSecret, @NonNull Attachment attachment) {
     try {
       return (MediaUtil.isGif(attachment)    && attachment.getSize() <= getGifMaxSize()   && isWithinBounds(context, masterSecret, attachment.getDataUri())) ||
              (MediaUtil.isImage(attachment)  && attachment.getSize() <= getImageMaxSize() && isWithinBounds(context, masterSecret, attachment.getDataUri())) ||
              (MediaUtil.isAudio(attachment)  && attachment.getSize() <= getAudioMaxSize()) ||
              (MediaUtil.isVideo(attachment)  && attachment.getSize() <= getVideoMaxSize()) ||
-             (!MediaUtil.isImage(attachment) && !MediaUtil.isAudio(attachment) && !MediaUtil.isVideo(attachment));
+             (MediaUtil.isFile(attachment) && attachment.getSize() <= getDocumentMaxSize());
     } catch (IOException ioe) {
       Log.w(TAG, "Failed to determine if media's constraints are satisfied.", ioe);
       return false;

src/org/thoughtcrime/securesms/mms/MmsMediaConstraints.java

@@ -38,4 +38,9 @@ public class MmsMediaConstraints extends MediaConstraints {
   public int getAudioMaxSize() {
     return MAX_MESSAGE_SIZE;
   }
+
+  @Override
+  public int getDocumentMaxSize() {
+    return MAX_MESSAGE_SIZE;
+  }
 }

src/org/thoughtcrime/securesms/mms/PushMediaConstraints.java

@@ -39,4 +39,9 @@ public class PushMediaConstraints extends MediaConstraints {
   public int getAudioMaxSize() {
     return 100 * MB;
   }
+
+  @Override
+  public int getDocumentMaxSize() {
+    return 100 * MB;
+  }
 }

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

@@ -164,6 +164,10 @@ public class MediaUtil {
     return !TextUtils.isEmpty(contentType) && contentType.trim().startsWith("video/");
   }
 
+  public static boolean isFile(Attachment attachment) {
+    return !isImage(attachment) && !isAudio(attachment) && !isVideo(attachment);
+  }
+
   public static boolean hasVideoThumbnail(Uri uri) {
     Log.w(TAG, "Checking: " + uri);