attributed string

test.m

+ (NSAttributedString *)attributedStringWithContent:(NSArray *)nodes {
  return [self attributedStringWithContent:nodes attributes:@{}];
}

+ (NSAttributedString *)attributedStringWithContent:(NSArray *)nodes attributes:(NSDictionary *)attributes {
  NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] init];
  for (NSDictionary *node in nodes) {
    if ([node[@"type"] isEqual:@"paragraph"]) {
      [attributedString appendAttributedString:[self attributedStringWithContent:node[@"content"]]];
    }
    else if ([node[@"type"] isEqual:@"text"]) {
      NSMutableDictionary *newAttributes = [attributes mutableCopy];
      if (!newAttributes[NSForegroundColorAttributeName]) {
        newAttributes[NSForegroundColorAttributeName] = [RCTConvert UIColor:@"#737f8d"] /* GREY3 */;
      }
      if (!newAttributes[NSFontAttributeName]) {
        newAttributes[NSFontAttributeName] = [UIFont fontWithName:@"Whitney Book" size:15];
      }
      [attributedString appendAttributedString:[[NSAttributedString alloc]
        initWithString:node[@"content"]
            attributes:newAttributes]];
    }
    else if ([node[@"type"] isEqual:@"strong"] || [node[@"type"] isEqual:@"em"]) {
      // TODO: we need italic version of whitney
      [attributedString appendAttributedString:[self attributedStringWithContent:node[@"content"] attributes:@{
        NSFontAttributeName: [UIFont fontWithName:@"WhitneyBold" size:15],
      }]];
    }
    else if ([node[@"type"] isEqual:@"u"]) {
      [attributedString appendAttributedString:[self attributedStringWithContent:node[@"content"] attributes:@{
        NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle),
      }]];
    }
    else if ([node[@"type"] isEqual:@"link"]) {
      // TODO: make links clickable
      [attributedString appendAttributedString:[self attributedStringWithContent:node[@"content"] attributes:@{
        NSUnderlineStyleAttributeName: @(NSUnderlineStyleNone),
        NSForegroundColorAttributeName: [RCTConvert UIColor:@"#00b0f4"] /* ? */,
        NSLinkAttributeName: node[@"target"]
      }]];
    }
    else if ([node[@"type"] isEqual:@"mention"]) {
      [attributedString appendAttributedString:[self attributedStringWithContent:node[@"content"] attributes:@{
        NSForegroundColorAttributeName: [RCTConvert UIColor:@"#738bd7"] /* BRAND_PURPLE */,
        NSBackgroundColorAttributeName: [RCTConvert UIColor:@"#f1f3fb"] /* BRAND_PURPLE -90% */,
      }]];
    }
    else if ([node[@"type"] isEqual:@"newline"]) {
      [attributedString appendAttributedString:[[NSAttributedString alloc] initWithString:@"\n"]];
    }
    else {
      NSLog(@"unknown node: %@", node);
    }
  }
  return attributedString;
}