Adopt the EXA forbidden terms list when searching for public rooms

Riot/Modules/PublicRoomList/DataSources/PublicRoomsDirectoryDataSource.m

@@ -46,6 +46,8 @@ static NSString *const kNSFWKeyword = @"nsfw";
     NSString *nextBatch;
 }
 
+@property (nonatomic, strong) NSRegularExpression *forbiddenTermsRegex;
+
 @end
 
 @implementation PublicRoomsDirectoryDataSource
@@ -57,6 +59,15 @@ static NSString *const kNSFWKeyword = @"nsfw";
     {
         rooms = [NSMutableArray array];
         _paginationLimit = 20;
+        
+        NSString *path = [[NSBundle mainBundle] pathForResource:@"forbidden_terms" ofType:@"txt"];
+        NSString *fileContents = [NSString stringWithContentsOfFile:path encoding: NSUTF8StringEncoding error:nil];
+        NSArray *forbiddenTerms = [fileContents componentsSeparatedByCharactersInSet: NSCharacterSet.whitespaceAndNewlineCharacterSet];
+        
+        NSString *pattern = [NSString stringWithFormat:@"\\b(%@)\\b", [forbiddenTerms componentsJoinedByString:@"|"]];
+        pattern = [pattern stringByAppendingString:@"|(\\b18\\+)"]; // Special case "18+"
+        
+        _forbiddenTermsRegex = [[NSRegularExpression alloc] initWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:nil];
     }
     return self;
 }
@@ -244,7 +255,7 @@ static NSString *const kNSFWKeyword = @"nsfw";
             
             NSArray<MXPublicRoom*> *publicRooms;
             
-            publicRooms = [self filterPublicRooms:publicRoomsResponse.chunk containingKeyword:kNSFWKeyword];
+            publicRooms = [self filterPublicRooms:publicRoomsResponse.chunk];
 
             [self->rooms addObjectsFromArray:publicRooms];
             self->nextBatch = publicRoomsResponse.nextBatch;
@@ -321,15 +332,23 @@ static NSString *const kNSFWKeyword = @"nsfw";
     }
 }
 
-- (NSArray<MXPublicRoom*>*)filterPublicRooms:(NSArray<MXPublicRoom*>*)publicRooms containingKeyword:(NSString*)keyword
+- (NSArray<MXPublicRoom*>*)filterPublicRooms:(NSArray<MXPublicRoom*>*)publicRooms
 {
     NSMutableArray *filteredRooms = [NSMutableArray new];
 
     for (MXPublicRoom *publicRoom in publicRooms)
     {
-        if (NO == [[publicRoom.name lowercaseString] containsString:keyword]
-            && NO == [[publicRoom.topic lowercaseString] containsString:keyword])
-        {
+        BOOL shouldAllow = YES;
+        
+        if (publicRoom.name != nil) {
+            shouldAllow &= [self.forbiddenTermsRegex numberOfMatchesInString:publicRoom.name options:0 range:NSMakeRange(0, publicRoom.name.length)] == 0;
+        }
+        
+        if (publicRoom.topic != nil) {
+            shouldAllow &= [self.forbiddenTermsRegex numberOfMatchesInString:publicRoom.topic options:0 range:NSMakeRange(0, publicRoom.topic.length)] == 0;
+        }
+        
+        if (shouldAllow) {
             [filteredRooms addObject:publicRoom];
         }
     }

Riot/SupportingFiles/forbidden_terms.txt

@@ -0,0 +1,68 @@
+anal
+bbw
+bdsm
+beast
+bestiality
+blowjob
+bondage
+boobs
+clit
+cock
+cuck
+cum
+cunt
+daddy
+dick
+dildo
+erotic
+exhibitionism
+faggot
+femboy
+fisting
+flogging
+fmf
+foursome
+futa
+gangbang
+gore
+h3ntai
+handjob
+hentai
+incest
+jizz
+kink
+loli
+m4f
+masturbate
+masturbation
+mfm
+milf
+moresome
+naked
+neet
+nsfw
+nude
+nudity
+orgy
+pedo
+pegging
+penis
+petplay
+porn
+pussy
+rape
+rimming
+sadism
+sadomasochism
+sexy
+shota
+spank
+squirt
+strap-on
+threesome
+vagina
+vibrator
+voyeur
+watersports
+xxx
+zoo