discourse/script/import_scripts/socialcast/create_title.rb

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Ruby
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2016-05-26 02:54:38 -04:00
require 'uri'
class CreateTitle
def self.from_body(body)
title = remove_mentions body
title = remove_urls title
title = remove_stray_punctuation title
title = first_long_line title
return unless title
sentences = complete_sentences title
if !sentences.nil?
title = sentences[1]
else
title = complete_words title
end
return title unless title.nil? || title.size < 20
end
private
def self.remove_mentions(text)
text.gsub(/@[\w]*/, '')
end
def self.remove_urls(text)
text.gsub(URI::regexp(['http', 'https', 'mailto', 'ftp', 'ldap', 'ldaps']), '')
end
def self.remove_stray_punctuation(text)
text.gsub(/\s+?[^a-zA-Z0-9\s]\s+/, "\n")
end
def self.first_long_line(text)
lines = text.split("\n").select {|t| t.strip.size >= 20}
return if lines.empty?
lines[0].strip
end
def self.complete_sentences(text)
/(^.*[\S]{2,}[.!?:]+)\W/.match(text[0...80] + ' ')
end
def self.complete_words(text)
return text[0...80].rpartition(/\s/)[0] + "..." if text.size >= 80
text
end
end