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# frozen_string_literal: true
module Decidim
module ContentParsers
# A parser that searches hashtags in content.
#
# A word starting with `#` will be considered as a hashtag if
# it only contains letters, numbers or underscores. If the `#` is
# followed with an underscore, then it is not considered.
#
# @see BaseParser Examples of how to use a content parser
class HashtagParser < TagParser
# Class used as a container for metadata
#
# @!attribute hashtags
# @return [Array] an array of Decidim::Hashtag mentioned in content
Metadata = Struct.new(:hashtags)
# Matches a hashtag if it starts with a letter or number
# and only contains letters, numbers or underscores.
HASHTAG_REGEX = /(?:\A|\s\K)\B#([[:alnum:]](?:[[:alnum:]]|_)*)\b/i
def metadata
Metadata.new(content_tags.map { |content_hashtag| hashtag(content_hashtag) }.uniq)
end
private
def tag_data_type
"hashtag"
end
def replace_tags(text)
text.gsub(HASHTAG_REGEX) do |match|
"#{hashtag(match[1..-1]).to_global_id}/#{extra_hashtags? ? "_" : ""}#{match[1..-1]}"
end
end
def scan_tags(text)
text.scan(HASHTAG_REGEX)
end
def hashtag(name)
hashtags[name.downcase] ||= Decidim::Hashtag.create(organization: current_organization, name: name.downcase)
end
def hashtags
@hashtags ||= existing_hashtags.index_by(&:name)
end
def existing_hashtags
@existing_hashtags ||= Decidim::Hashtag.where(organization: current_organization, name: content_tags.map(&:downcase))
end
def current_organization
@current_organization ||= context[:current_organization]
end
def extra_hashtags?
return @extra_hashtags if defined?(@extra_hashtags)
@extra_hashtags = context[:extra_hashtags]
end
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems