120 lines
4.1 KiB
Ruby
120 lines
4.1 KiB
Ruby
# == Mentionable concern
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#
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# Contains functionality related to objects that can mention Users, Issues, MergeRequests, or Commits by
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# GFM references.
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#
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# Used by Issue, Note, MergeRequest, and Commit.
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#
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module Mentionable
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extend ActiveSupport::Concern
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module ClassMethods
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# Indicate which attributes of the Mentionable to search for GFM references.
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def attr_mentionable(*attrs)
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mentionable_attrs.concat(attrs.map(&:to_s))
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end
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# Accessor for attributes marked mentionable.
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def mentionable_attrs
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@mentionable_attrs ||= []
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end
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end
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included do
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if self < Participable
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participant ->(current_user) { mentioned_users(current_user, load_lazy_references: false) }
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end
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end
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# Returns the text used as the body of a Note when this object is referenced
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#
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# By default this will be the class name and the result of calling
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# `to_reference` on the object.
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def gfm_reference(from_project = nil)
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# "MergeRequest" > "merge_request" > "Merge request" > "merge request"
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friendly_name = self.class.to_s.underscore.humanize.downcase
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"#{friendly_name} #{to_reference(from_project)}"
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end
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# Construct a String that contains possible GFM references.
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def mentionable_text
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self.class.mentionable_attrs.map { |attr| send(attr) }.compact.join("\n\n")
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end
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# The GFM reference to this Mentionable, which shouldn't be included in its #references.
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def local_reference
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self
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end
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def all_references(current_user = self.author, text = self.mentionable_text, load_lazy_references: true)
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ext = Gitlab::ReferenceExtractor.new(self.project, current_user, load_lazy_references: load_lazy_references)
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ext.analyze(text)
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ext
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end
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def mentioned_users(current_user = nil, load_lazy_references: true)
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all_references(current_user, load_lazy_references: load_lazy_references).users
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end
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# Extract GFM references to other Mentionables from this Mentionable. Always excludes its #local_reference.
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def referenced_mentionables(current_user = self.author, text = self.mentionable_text, load_lazy_references: true)
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return [] if text.blank?
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refs = all_references(current_user, text, load_lazy_references: load_lazy_references)
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(refs.issues + refs.merge_requests + refs.commits) - [local_reference]
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end
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# Create a cross-reference Note for each GFM reference to another Mentionable found in +mentionable_text+.
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def create_cross_references!(author = self.author, without = [], text = self.mentionable_text)
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refs = referenced_mentionables(author, text)
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# We're using this method instead of Array diffing because that requires
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# both of the object's `hash` values to be the same, which may not be the
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# case for otherwise identical Commit objects.
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refs.reject! { |ref| without.include?(ref) || cross_reference_exists?(ref) }
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refs.each do |ref|
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SystemNoteService.cross_reference(ref, local_reference, author)
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end
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end
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# When a mentionable field is changed, creates cross-reference notes that
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# don't already exist
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def create_new_cross_references!(author = self.author)
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changes = detect_mentionable_changes
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return if changes.empty?
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original_text = changes.collect { |_, vals| vals.first }.join(' ')
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preexisting = referenced_mentionables(author, original_text)
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create_cross_references!(author, preexisting)
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end
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private
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# Returns a Hash of changed mentionable fields
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#
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# Preference is given to the `changes` Hash, but falls back to
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# `previous_changes` if it's empty (i.e., the changes have already been
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# persisted).
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#
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# See ActiveModel::Dirty.
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#
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# Returns a Hash.
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def detect_mentionable_changes
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source = (changes.present? ? changes : previous_changes).dup
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mentionable = self.class.mentionable_attrs
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# Only include changed fields that are mentionable
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source.select { |key, val| mentionable.include?(key) }
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end
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# Determine whether or not a cross-reference Note has already been created between this Mentionable and
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# the specified target.
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def cross_reference_exists?(target)
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SystemNoteService.cross_reference_exists?(target, local_reference)
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end
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end
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