Yorick Peterse authored
There are several changes to this module: 1. The use of an explicit stack in Participable#participants 2. Proc behaviour has been changed 3. Batch permissions checking == Explicit Stack Participable#participants no longer uses recursion to process "self" and all child objects, instead it uses an Array and processes objects in breadth-first order. This allows us to for example create a single Gitlab::ReferenceExtractor instance and pass this to any Procs. Re-using a ReferenceExtractor removes the need for running potentially many SQL queries every time a Proc is called on a new object. == Proc Behaviour Changed Previously a Proc in Participable was expected to return an Array of User instances. This has been changed and instead it's now expected that a Proc modifies the Gitlab::ReferenceExtractor passed to it. The return value of the Proc is ignored. == Permissions Checking The method Participable#participants uses Ability.users_that_can_read_project to check if the returned users have access to the project of "self" _without_ running multiple SQL queries for every user.