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require 'gitlab/markdown'
module Gitlab
# Extract possible GFM references from an arbitrary String for further processing.
class ReferenceExtractor
attr_accessor :project, :current_user
def initialize(project, current_user = nil)
@project = project
@current_user = current_user
end
def analyze(texts)
references.clear
texts = Array(texts)
@texts = texts.map { |text| Gitlab::Markdown.render_without_gfm(text) }
end
%i(user label issue merge_request snippet commit commit_range).each do |type|
define_method("#{type}s") do
references[type]
end
end
private
def references
@references ||= Hash.new do |references, type|
type = type.to_sym
return references[type] if references.has_key?(type)
references[type] = pipeline_result(type).uniq
end
end
# Instantiate and call HTML::Pipeline with a single reference filter type,
# returning the result
#
# filter_type - Symbol reference type (e.g., :commit, :issue, etc.)
#
# Returns the results Array for the requested filter type
def pipeline_result(filter_type)
klass = filter_type.to_s.camelize + 'ReferenceFilter'
filter = Gitlab::Markdown.const_get(klass)
context = {
project: project,
current_user: current_user,
# We don't actually care about the links generated
only_path: true,
ignore_blockquotes: true,
load_lazy_references: false
}
pipeline = HTML::Pipeline.new([filter, Gitlab::Markdown::ReferenceGathererFilter], context)
values = @texts.flat_map do |text|
result = pipeline.call(text)
result[:references][filter_type]
end
Gitlab::Markdown::ReferenceFilter::LazyReference.load(values)
end
end
end
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