Attachment type in notification and description.

Signal/src/textsecure/Messages/TSAttachment.m

@@ -8,6 +8,7 @@
 //
 
 #import "TSAttachment.h"
+#import "MIMETypeUtil.h"
 
 @implementation TSAttachment
 
@@ -34,4 +35,18 @@
     return [f numberFromString:self.uniqueId];
 }
 
+- (NSString*)description {
+    NSString *attachmentString = NSLocalizedString(@"ATTACHMENT", nil);
+    
+    if ([MIMETypeUtil isImage:self.contentType]) {
+        return [NSString stringWithFormat:@"📷 %@", attachmentString];
+    } else if ([MIMETypeUtil isVideo:self.contentType]) {
+        return [NSString stringWithFormat:@"📽 %@", attachmentString];
+    } else if ([MIMETypeUtil isAudio:self.contentType]) {
+        return [NSString stringWithFormat:@"📻 %@", attachmentString];
+    }
+    
+    return attachmentString;
+}
+
 @end

Signal/src/textsecure/Messages/TSMessage.m

@@ -61,7 +61,9 @@ NSString * const TSAttachementsRelationshipEdgeName = @"TSAttachmentEdge";
 
 - (NSString *)description{
     if(self.attachments > 0){
-        return NSLocalizedString(@"ATTACHMENT", nil);
+        NSString *attachmentId = self.attachments[0];
+        TSAttachment *attachment = [TSAttachment fetchObjectWithUniqueID:attachmentId];
+        return attachment.description;
     } else {
         return self.body;
     }