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module Gitlab
# Extract possible GFM references from an arbitrary String for further processing.
class ReferenceExtractor
attr_accessor :users, :labels, :issues, :merge_requests, :snippets, :commits, :commit_ranges
include ::Gitlab::Markdown
def initialize
@users, @labels, @issues, @merge_requests, @snippets, @commits, @commit_ranges =
[], [], [], [], [], [], []
end
def analyze(string, project)
text = string.dup
# Remove preformatted/code blocks so that references are not included
text.gsub!(%r{<pre>.*?</pre>|<code>.*?</code>}m) { |match| '' }
text.gsub!(%r{^```.*?^```}m) { |match| '' }
parse_references(text, project)
end
# Given a valid project, resolve the extracted identifiers of the requested type to
# model objects.
def users_for(project)
users.map do |entry|
project.users.where(username: entry[:id]).first
end.reject(&:nil?)
end
def labels_for(project = nil)
labels.map do |entry|
project.labels.where(id: entry[:id]).first
end.reject(&:nil?)
end
def issues_for(project = nil)
issues.map do |entry|
if should_lookup?(project, entry[:project])
entry[:project].issues.where(iid: entry[:id]).first
end
end.reject(&:nil?)
end
def merge_requests_for(project = nil)
merge_requests.map do |entry|
if should_lookup?(project, entry[:project])
entry[:project].merge_requests.where(iid: entry[:id]).first
end
end.reject(&:nil?)
end
def snippets_for(project)
snippets.map do |entry|
project.snippets.where(id: entry[:id]).first
end.reject(&:nil?)
end
def commits_for(project = nil)
commits.map do |entry|
repo = entry[:project].repository if entry[:project]
if should_lookup?(project, entry[:project])
repo.commit(entry[:id]) if repo
end
end.reject(&:nil?)
end
def commit_ranges_for(project = nil)
commit_ranges.map do |entry|
repo = entry[:project].repository if entry[:project]
if repo && should_lookup?(project, entry[:project])
from_id, to_id = entry[:id].split(/\.{2,3}/, 2)
[repo.commit(from_id), repo.commit(to_id)]
end
end.reject(&:nil?)
end
private
def reference_link(type, identifier, project, _)
# Append identifier to the appropriate collection.
send("#{type}s") << { project: project, id: identifier }
end
def should_lookup?(project, entry_project)
if entry_project.nil?
false
else
project.nil? || entry_project.default_issues_tracker?
end
end
end
end
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