Avoid lossy re-encoding of profile image

// FREEBIE

Signal/src/Profiles/OWSProfileManager.h

@@ -57,6 +57,10 @@ extern NSString *const kNSNotificationName_OtherUsersProfileDidChange;
 
 - (nullable UIImage *)profileAvatarForRecipientId:(NSString *)recipientId;
 
+// Reads raw avatar data from disk if available. Uncached, so shouldn't be used frequently,
+// but useful to get the raw image data for populating cnContact.imageData without lossily re-encoding.
+- (nullable NSData *)profileAvatarDataForRecipientId:(NSString *)recipientId;
+
 - (void)refreshProfileForRecipientId:(NSString *)recipientId;
 
 - (void)updateProfileForRecipientId:(NSString *)recipientId

Signal/src/Profiles/OWSProfileManager.m

@@ -718,6 +718,15 @@ static const NSUInteger kOWSProfileManager_NameDataLength = 26;
     return userProfile.profileName;
 }
 
+- (nullable NSData *)profileAvatarDataForRecipientId:(NSString *)recipientId
+{
+    UserProfile *userProfile = [self getOrBuildUserProfileForRecipientId:recipientId];
+    if (userProfile.avatarFileName.length > 0) {
+        return [self loadProfileDataWithFilename:userProfile.avatarFileName];
+    }
+    return nil;
+}
+
 - (nullable UIImage *)profileAvatarForRecipientId:(NSString *)recipientId
 {
     OWSAssert([NSThread isMainThread]);
@@ -1001,12 +1010,20 @@ static const NSUInteger kOWSProfileManager_NameDataLength = 26;
 
 #pragma mark - Avatar Disk Cache
 
-- (nullable UIImage *)loadProfileAvatarWithFilename:(NSString *)fileName
+- (nullable NSData *)loadProfileDataWithFilename:(NSString *)filename
 {
-    OWSAssert(fileName.length > 0);
+    OWSAssert(filename.length > 0);
 
-    NSString *filePath = [self.profileAvatarsDirPath stringByAppendingPathComponent:fileName];
-    UIImage *_Nullable image = [UIImage imageWithContentsOfFile:filePath];
+    NSString *filePath = [self.profileAvatarsDirPath stringByAppendingPathComponent:filename];
+    return [NSData dataWithContentsOfFile:filePath];
+}
+
+- (nullable UIImage *)loadProfileAvatarWithFilename:(NSString *)filename
+{
+    OWSAssert(filename.length > 0);
+
+    NSString *filePath = [self.profileAvatarsDirPath stringByAppendingPathComponent:filename];
+    UIImage *_Nullable image = [UIImage imageWithData:[self loadProfileDataWithFilename:filename]];
     return image;
 }
 

Signal/src/ViewControllers/ContactsViewHelper.m

@@ -412,13 +412,9 @@ NS_ASSUME_NONNULL_BEGIN
         CNLabeledValue<CNPhoneNumber *> *labeledPhoneNumber =
             [CNLabeledValue labeledValueWithLabel:CNLabelPhoneNumberMain value:phoneNumber];
         newContact.phoneNumbers = @[ labeledPhoneNumber ];
-        newContact.givenName = [self.profileManager profileNameForRecipientId:recipientId];
 
-        UIImage *_Nullable profileImage = [self.profileManager profileAvatarForRecipientId:recipientId];
-        if (profileImage) {
-            // TODO get raw jpg data from profileManager to avoid recompress.
-            newContact.imageData = UIImageJPEGRepresentation(profileImage, 0.9);
-        }
+        newContact.givenName = [self.profileManager profileNameForRecipientId:recipientId];
+        newContact.imageData = [self.profileManager profileAvatarDataForRecipientId:recipientId];
 
         contactViewController = [CNContactViewController viewControllerForNewContact:newContact];
     }