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Give Pholio Images an authorPHID and use ExtendedPolicies to implement policy…

Authored by epriestley on Dec 18 2018, 11:54 PM.

Description

Give Pholio Images an authorPHID and use ExtendedPolicies to implement policy behavior

Summary:
Depends on D19912. Ref T11351. Images currently use getMock()->getPolicy() stuff to define policies. This causes bugs with object policies like "Subscribers", since the policy engine tries to evaluate the subscribers for the image when the intent is to evaluate the subscribers for the mock.

Move this to ExtendedPolicies to fix the behavior, and give Images sensible policy behavior when they aren't attached to a mock (specifically: only the user who created the image can see it).

Test Plan: Applied migrations, created and edited mocks and images without anything blowing up. Set mock visibility to "Subscribers", everything worked great.

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T11351

Differential Revision: https://secure.phabricator.com/D19913