76 lines
1.9 KiB
Ruby
76 lines
1.9 KiB
Ruby
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# == Participable concern
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#
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# Contains functionality related to objects that can have participants, such as
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# an author, an assignee and people mentioned in its description or comments.
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#
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# Used by Issue, Note, MergeRequest, Snippet and Commit.
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#
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# Usage:
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#
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# class Issue < ActiveRecord::Base
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# include Participable
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#
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# # ...
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#
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# participant :author, :assignee, :mentioned_users, :notes
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# end
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#
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# issue = Issue.last
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# users = issue.participants
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# # `users` will contain the issue's author, its assignee,
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# # all users returned by its #mentioned_users method,
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# # as well as all participants to all of the issue's notes,
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# # since Note implements Participable as well.
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#
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module Participable
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extend ActiveSupport::Concern
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module ClassMethods
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def participant(*attrs)
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participant_attrs.concat(attrs.map(&:to_s))
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end
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def participant_attrs
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@participant_attrs ||= []
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end
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end
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# Be aware that this method makes a lot of sql queries.
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# Save result into variable if you are going to reuse it inside same request
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def participants(current_user = self.author, project = self.project)
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participants = self.class.participant_attrs.flat_map do |attr|
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meth = method(attr)
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value =
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if meth.arity == 1 || meth.arity == -1
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meth.call(current_user)
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else
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meth.call
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end
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participants_for(value, current_user, project)
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end.compact.uniq
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if project
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participants.select! do |user|
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user.can?(:read_project, project)
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end
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end
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participants
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end
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private
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def participants_for(value, current_user = nil, project = nil)
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case value
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when User
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[value]
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when Enumerable, ActiveRecord::Relation
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value.flat_map { |v| participants_for(v, current_user, project) }
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when Participable
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value.participants(current_user, project)
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end
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end
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end
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