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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, :load_lazy_references
def initialize(project, current_user = nil, load_lazy_references: true)
@project = project
@current_user = current_user
@load_lazy_references = load_lazy_references
end
def analyze(text)
references.clear
@document = Gitlab::Markdown.render(text, project: project)
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)
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,
load_lazy_references: false,
reference_filter: filter
}
result = self.class.pipeline.call(@document, context)
values = result[:references][filter_type].uniq
if @load_lazy_references
values = Gitlab::Markdown::ReferenceFilter::LazyReference.load(values).uniq
end
values
end
def self.pipeline
@pipeline ||= HTML::Pipeline.new([Gitlab::Markdown::ReferenceGathererFilter])
end
end
end
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