Class: Collavre::CommentLinkFormatter

Inherits:
Object
  • Object
show all
Defined in:
app/services/collavre/comment_link_formatter.rb

Constant Summary collapse

URL_REGEX = 
URI::DEFAULT_PARSER.make_regexp(%w[http https])
TRAILING_PUNCTUATION = 
".,!?;:".freeze

Instance Method Summary collapse

Constructor Details

#initialize(content, metadata_fetcher: nil, logger: Rails.logger) ⇒ CommentLinkFormatter

Returns a new instance of CommentLinkFormatter.



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# File 'app/services/collavre/comment_link_formatter.rb', line 8

def initialize(content, metadata_fetcher: nil, logger: Rails.logger)
  @content = content.to_s
  @metadata_fetcher = metadata_fetcher || method(:default_fetch_metadata)
  @logger = logger
end

Instance Method Details

#format ⇒ Object 



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# File 'app/services/collavre/comment_link_formatter.rb', line 14

def format
  return @content if @content.blank?

  @content.gsub(URL_REGEX) do |match|
    match_data = Regexp.last_match
    url, trailing = strip_trailing_punctuation(match)
    next match if markdown_link?(match_data.pre_match)

    metadata = fetch_metadata(url)
    title = metadata[:title].presence
    next match if title.blank?

    "[#{title}](#{url})#{trailing}"
  end
end