Tweak.xm

#import <Carousel.h>
#import <Comment.h>
#import <Post.h>
#import <ToggleImageTableViewCell.h>
#import <UIKit/UIKit.h>
#import <dlfcn.h>
#import <mach-o/dyld.h>
#import <objc/runtime.h>
#import "Preferences.h"

static NSMutableArray *assetBundles;

extern "C" UIImage *iconWithName(NSString *iconName) {
  NSArray *commonIconSizes = @[
    @"24",
    @"20",
    @"16",
  ];
  UIImage *iconImage;
  for (NSBundle *bundle in assetBundles) {
    for (NSString *iconSize in commonIconSizes) {
      if (iconImage) break;
      iconImage = [UIImage imageNamed:[NSString stringWithFormat:@"%@_%@", iconName, iconSize]
                               inBundle:bundle
          compatibleWithTraitCollection:nil];
    }
    if (!iconImage)
      iconImage = [UIImage imageNamed:iconName inBundle:bundle compatibleWithTraitCollection:nil];
  }
  return iconImage;
}

extern "C" NSString *localizedString(NSString *key, NSString *table) {
  for (NSBundle *bundle in assetBundles) {
    NSString *localizedString = [bundle localizedStringForKey:key value:nil table:table];
    if (![localizedString isEqualToString:key]) return localizedString;
  }
  return nil;
}

extern "C" Class CoreClass(NSString *name) {
  Class cls = NSClassFromString(name);
  NSArray *prefixes = @[
    @"Reddit.",
    @"RedditCore.",
    @"RedditCoreModels.",
    @"RedditCore_RedditCoreModels.",
    @"RedditUI.",
  ];
  for (NSString *prefix in prefixes) {
    if (cls) break;
    cls = NSClassFromString([prefix stringByAppendingString:name]);
  }
  return cls;
}

static BOOL shouldFilterObject(id object) {
  NSString *className = NSStringFromClass(object_getClass(object));
  BOOL isAdPost = [className hasSuffix:@"AdPost"] ||
                  ([object respondsToSelector:@selector(isAdPost)] && ((Post *)object).isAdPost) ||
                  ([object respondsToSelector:@selector(isPromotedUserPostAd)] &&
                   [(Post *)object isPromotedUserPostAd]) ||
                  ([object respondsToSelector:@selector(isPromotedCommunityPostAd)] &&
                   [(Post *)object isPromotedCommunityPostAd]);
  BOOL isRecommendation = [className containsString:@"Recommend"];
  BOOL isLivestream = [className containsString:@"Stream"];
  BOOL isNSFW = [object respondsToSelector:@selector(isNSFW)] && ((Post *)object).isNSFW;
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterPromoted] && isAdPost)
    return YES;
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterRecommended] && isRecommendation)
    return YES;
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterLivestreams] && isLivestream)
    return YES;
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterNSFW] && isNSFW) return YES;
  return NO;
}

static NSArray *filteredObjects(NSArray *objects) {
  return [objects filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(
                                                               id object, NSDictionary *bindings) {
                    return !shouldFilterObject(object);
                  }]];
}

static void filterNode(NSMutableDictionary *node) {
  if (![node isKindOfClass:NSMutableDictionary.class]) return;

  // Regular post
  if ([node[@"__typename"] isEqualToString:@"SubredditPost"]) {
    if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards]) {
      node[@"awardings"] = @[];
      node[@"isGildable"] = @NO;
    }

    if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterScores])
      node[@"isScoreHidden"] = @YES;

    if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterNSFW] &&
        [node[@"isNsfw"] boolValue])
      node[@"isHidden"] = @YES;
  }
  if ([node[@"__typename"] isEqualToString:@"CellGroup"]) {
    for (NSMutableDictionary *cell in node[@"cells"]) {
      if ([cell[@"__typename"] isEqualToString:@"ActionCell"]) {
        if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards]) {
          cell[@"isAwardHidden"] = @YES;
          cell[@"goldenUpvoteInfo"][@"isGildable"] = @NO;
        }

        if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterScores])
          cell[@"isScoreHidden"] = @YES;
      }
    }
  }

  // Ad post
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterPromoted]) {
    if ([node[@"__typename"] isEqualToString:@"AdPost"]) node[@"isHidden"] = @YES;
    if ([node[@"__typename"] isEqualToString:@"CellGroup"] &&
        [node[@"adPayload"] isKindOfClass:NSDictionary.class])
      node[@"cells"] = @[];
  }

  // Recommendation
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterRecommended]) {
    if ([node[@"__typename"] isEqualToString:@"CellGroup"] && ![node[@"recommendationContext"] isEqual:[NSNull null]])
      node[@"cells"] = @[];
  }

  // Comment
  if ([node[@"__typename"] isEqualToString:@"Comment"]) {
    if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards]) {
      node[@"awardings"] = @[];
      node[@"isGildable"] = @NO;
    }

    if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterScores])
      node[@"isScoreHidden"] = @YES;

    if ([node[@"authorInfo"] isKindOfClass:NSDictionary.class] &&
        [node[@"authorInfo"][@"id"] isEqualToString:@"t2_6l4z3"] &&
        [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAutoCollapseAutoMod])
      node[@"isInitiallyCollapsed"] = @YES;
  }
}

%hook NSURLSession
- (NSURLSessionDataTask *)dataTaskWithRequest:(NSURLRequest *)request
                            completionHandler:(void (^)(NSData *data, NSURLResponse *response,
                                                        NSError *error))completionHandler {
  if (![request.URL.host hasPrefix:@"gql"] && ![request.URL.host hasPrefix:@"oauth"])
    return %orig;
  void (^newCompletionHandler)(NSData *, NSURLResponse *, NSError *) =
      ^(NSData *data, NSURLResponse *response, NSError *error) {
        if (!data || error) return completionHandler(data, response, error);
        NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data
                                                             options:NSJSONReadingMutableContainers
                                                               error:&error];
        if (!json || error) return completionHandler(data, response, error);
        if ([json isKindOfClass:NSDictionary.class]) {
          if (json[@"data"] && [json[@"data"] isKindOfClass:NSDictionary.class]) {
            NSDictionary *data = json[@"data"];
            NSMutableDictionary *root = data.allValues.firstObject;
            if ([root isKindOfClass:NSDictionary.class]) {
              if ([root.allValues.firstObject isKindOfClass:NSDictionary.class] &&
                  root.allValues.firstObject[@"edges"])
                for (NSMutableDictionary *edge in root.allValues.firstObject[@"edges"])
                  filterNode(edge[@"node"]);

              if (root[@"commentForest"])
                for (NSMutableDictionary *tree in root[@"commentForest"][@"trees"])
                  filterNode(tree[@"node"]);

              if (root[@"commentsPageAds"] &&
                  [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterPromoted])
                root[@"commentsPageAds"] = @[];

              if (root[@"recommendations"] &&
                  [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterRecommended])
                root[@"recommendations"] = @[];

            } else if ([root isKindOfClass:NSArray.class]) {
              for (NSMutableDictionary *node in (NSArray *)root) filterNode(node);
            }
          }
        }
        data = [NSJSONSerialization dataWithJSONObject:json options:0 error:nil];
        completionHandler(data, response, error);
      };
  return %orig(request, newCompletionHandler);
}
%end

// Only necessary for older app versions
%group Legacy

%hook Listing
- (void)fetchNextPage:(id (^)(NSArray *, id))completionHandler {
  id (^newCompletionHandler)(NSArray *, id) = ^(NSArray *objects, id _) {
    return completionHandler(filteredObjects(objects), _);
  };
  return %orig(newCompletionHandler);
}
%end

%hook FeedNetworkSource
- (NSArray *)postsAndCommentsFromData:(id)data {
  return filteredObjects(%orig);
}
%end

%hook PostDetailPresenter
- (BOOL)shouldFetchCommentAdPost {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterPromoted] ? NO
                                                                                : %orig;
}
- (BOOL)shouldFetchAdditionalCommentAdPosts {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterPromoted] ? NO
                                                                                : %orig;
}
%end

%hook StreamManager
- (instancetype)initWithAccountContext:(id)accountContext
                                source:(NSInteger)source
                 deeplinkSubredditName:(id)deeplinkSubredditName
                       streamingConfig:(id)streamingConfig {
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterLivestreams]) return nil;
  return %orig;
}
- (instancetype)initWithService:(id)service
                         source:(NSInteger)source
          deeplinkSubredditName:(id)deeplinkSubredditName
                streamingConfig:(id)streamingConfig {
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterLivestreams]) return nil;
  return %orig;
}
%end

%hook Carousel
- (BOOL)isHiddenByUserWithAccountSettings:(id)accountSettings {
  return ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterRecommended] &&
          ([self.analyticType containsString:@"recommended"] ||
           [self.analyticType containsString:@"similar"] ||
           [self.analyticType containsString:@"popular"])) ||
         %orig;
}
%end

%hook QuickActionViewModel
- (void)fetchActions {
  if ([NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterRecommended]) return;
  %orig;
}
%end

%hook Post
- (NSArray *)awardingTotals {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards] ? nil
                                                                              : %orig;
}
- (NSUInteger)totalAwardsReceived {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards] ? 0
                                                                              : %orig;
}
- (BOOL)canAward {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards] ? NO
                                                                              : %orig;
}
- (BOOL)isScoreHidden {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterScores] ? YES
                                                                              : %orig;
}
%end

%hook Comment
- (NSArray *)awardingTotals {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards] ? nil
                                                                              : %orig;
}
- (NSUInteger)totalAwardsReceived {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards] ? 0
                                                                              : %orig;
}
- (BOOL)canAward {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards] ? NO
                                                                              : %orig;
}
- (BOOL)shouldHighlightForHighAward {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAwards] ? NO
                                                                              : %orig;
}
- (BOOL)isScoreHidden {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterScores] ? YES
                                                                              : %orig;
}
- (BOOL)shouldAutoCollapse {
  return [NSUserDefaults.standardUserDefaults boolForKey:kRedditFilterAutoCollapseAutoMod] &&
                 [((Comment *)self).authorPk isEqualToString:@"t2_6l4z3"]
             ? YES
             : %orig;
}
%end

%hook ToggleImageTableViewCell
- (void)updateConstraints {
  %orig;
  UIStackView *horizontalStackView =
      [self respondsToSelector:@selector(imageLabelView)]
          ? [self imageLabelView].horizontalStackView
          : object_getIvar(self,
                           class_getInstanceVariable(object_getClass(self), "horizontalStackView"));
  UILabel *detailLabel = [self respondsToSelector:@selector(imageLabelView)]
                             ? [self imageLabelView].detailLabel
                             : [self detailLabel];
  if (!horizontalStackView || !detailLabel) return;
  if (detailLabel.text) {
    UIView *contentView = [self contentView];
    [contentView addConstraints:@[
      [NSLayoutConstraint constraintWithItem:detailLabel
                                   attribute:NSLayoutAttributeHeight
                                   relatedBy:NSLayoutRelationEqual
                                      toItem:horizontalStackView
                                   attribute:NSLayoutAttributeHeight
                                  multiplier:.33
                                    constant:0],
      [NSLayoutConstraint constraintWithItem:horizontalStackView
                                   attribute:NSLayoutAttributeHeight
                                   relatedBy:NSLayoutRelationEqual
                                      toItem:contentView
                                   attribute:NSLayoutAttributeHeight
                                  multiplier:1
                                    constant:0],
      [NSLayoutConstraint constraintWithItem:horizontalStackView
                                   attribute:NSLayoutAttributeCenterY
                                   relatedBy:NSLayoutRelationEqual
                                      toItem:contentView
                                   attribute:NSLayoutAttributeCenterY
                                  multiplier:1
                                    constant:0]
    ]];
  }
}
%end

%end

%ctor {
  assetBundles = [NSMutableArray new];
  [assetBundles addObject:NSBundle.mainBundle];
  for (NSString *file in
       [NSFileManager.defaultManager contentsOfDirectoryAtPath:NSBundle.mainBundle.bundlePath
                                                         error:nil]) {
    if (![file hasSuffix:@"bundle"]) continue;
    NSBundle *bundle = [NSBundle
        bundleWithPath:[NSBundle.mainBundle pathForResource:[file stringByDeletingPathExtension]
                                                     ofType:@"bundle"]];
    if (bundle) [assetBundles addObject:bundle];
  }
  for (NSString *file in [NSFileManager.defaultManager
           contentsOfDirectoryAtPath:[NSBundle.mainBundle.bundlePath
                                         stringByAppendingPathComponent:@"Frameworks"]
                               error:nil]) {
    if (![file hasSuffix:@"framework"]) continue;
    NSBundle *bundle = [NSBundle
        bundleWithPath:[NSBundle.mainBundle pathForResource:[file stringByDeletingPathExtension]
                                                     ofType:@"framework"
                                                inDirectory:@"Frameworks"]];
    if (bundle) [assetBundles addObject:bundle];
  }
  %init;
  %init(Legacy, Comment = CoreClass(@"Comment"), Post = CoreClass(@"Post"),
                   QuickActionViewModel = CoreClass(@"QuickActionViewModel"),
                   StreamManager = CoreClass(@"StreamManager"),
                   ToggleImageTableViewCell = CoreClass(@"ToggleImageTableViewCell"));
}