Add 'is valid media?' method.

Signal/src/ViewControllers/ConversationView/ConversationViewItem.h

@@ -18,6 +18,7 @@ typedef NS_ENUM(NSInteger, OWSMessageCellType) {
     OWSMessageCellType_GenericAttachment,
     OWSMessageCellType_DownloadingAttachment,
     OWSMessageCellType_ContactShare,
+    OWSMessageCellType_MediaGallery,
 };
 
 NSString *NSStringForOWSMessageCellType(OWSMessageCellType cellType);

Signal/src/ViewControllers/ConversationView/ConversationViewItem.m

@@ -41,6 +41,8 @@ NSString *NSStringForOWSMessageCellType(OWSMessageCellType cellType)
             return @"OWSMessageCellType_Unknown";
         case OWSMessageCellType_ContactShare:
             return @"OWSMessageCellType_ContactShare";
+        case OWSMessageCellType_MediaGallery:
+            return @"OWSMessageCellType_MediaGallery";
     }
 }
 

SignalServiceKit/src/Messages/Attachments/TSAttachment.h

@@ -59,7 +59,11 @@ typedef NS_ENUM(NSUInteger, TSAttachmentType) {
 
 - (void)upgradeFromAttachmentSchemaVersion:(NSUInteger)attachmentSchemaVersion;
 
-- (BOOL)isVoiceMessage;
+@property (nonatomic, readonly) BOOL isAnimated;
+@property (nonatomic, readonly) BOOL isImage;
+@property (nonatomic, readonly) BOOL isVideo;
+@property (nonatomic, readonly) BOOL isAudio;
+@property (nonatomic, readonly) BOOL isVoiceMessage;
 
 + (NSString *)emojiForMimeType:(NSString *)contentType;
 

SignalServiceKit/src/Messages/Attachments/TSAttachment.m

@@ -195,6 +195,26 @@ NSUInteger const TSAttachmentSchemaVersion = 4;
     }
 }
 
+- (BOOL)isImage
+{
+    return [MIMETypeUtil isImage:self.contentType];
+}
+
+- (BOOL)isVideo
+{
+    return [MIMETypeUtil isVideo:self.contentType];
+}
+
+- (BOOL)isAudio
+{
+    return [MIMETypeUtil isAudio:self.contentType];
+}
+
+- (BOOL)isAnimated
+{
+    return [MIMETypeUtil isAnimated:self.contentType];
+}
+
 - (BOOL)isVoiceMessage
 {
     return self.attachmentType == TSAttachmentTypeVoiceMessage;

SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.h

@@ -43,11 +43,6 @@ typedef void (^OWSThumbnailFailure)(void);
 - (nullable NSData *)validStillImageData;
 #endif
 
-@property (nonatomic, readonly) BOOL isAnimated;
-@property (nonatomic, readonly) BOOL isImage;
-@property (nonatomic, readonly) BOOL isVideo;
-@property (nonatomic, readonly) BOOL isAudio;
-
 @property (nonatomic, readonly, nullable) UIImage *originalImage;
 @property (nonatomic, readonly, nullable) NSString *originalFilePath;
 @property (nonatomic, readonly, nullable) NSURL *originalMediaURL;
@@ -96,8 +91,9 @@ typedef void (^OWSThumbnailFailure)(void);
 
 #pragma mark - Validation
 
-- (BOOL)isValidImage;
-- (BOOL)isValidVideo;
+@property (nonatomic, readonly) BOOL isValidImage;
+@property (nonatomic, readonly) BOOL isValidVideo;
+@property (nonatomic, readonly) BOOL isValidMedia;
 
 #pragma mark - Update With... Methods
 

SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m

@@ -329,20 +329,21 @@ typedef void (^OWSLoadedThumbnailSuccess)(OWSLoadedThumbnail *loadedThumbnail);
     [self removeFileWithTransaction:transaction];
 }
 
-- (BOOL)isAnimated {
-    return [MIMETypeUtil isAnimated:self.contentType];
-}
+- (BOOL)isValidMedia
+{
+    if (self.isImage && self.isValidImage) {
+        return YES;
+    }
 
-- (BOOL)isImage {
-    return [MIMETypeUtil isImage:self.contentType];
-}
+    if (self.isVideo && self.isValidVideo) {
+        return YES;
+    }
 
-- (BOOL)isVideo {
-    return [MIMETypeUtil isVideo:self.contentType];
-}
+    if (self.isAnimated && self.isValidImage) {
+        return YES;
+    }
 
-- (BOOL)isAudio {
-    return [MIMETypeUtil isAudio:self.contentType];
+    return NO;
 }
 
 #pragma mark - Image Validation

SignalServiceKit/src/Storage/OWSMediaGalleryFinder.m

@@ -180,19 +180,7 @@ static NSString *const OWSMediaGalleryFinderExtensionName = @"OWSMediaGalleryFin
         return NO;
     }
 
-    if (attachment.isImage && attachment.isValidImage) {
-        return YES;
-    }
-
-    if (attachment.isVideo && attachment.isValidVideo) {
-        return YES;
-    }
-
-    if (attachment.isAnimated && attachment.isValidImage) {
-        return YES;
-    }
-
-    return NO;
+    return attachment.isValidMedia;
 }
 
 @end