- Fixes #8
- Fixes #9
- Fixes #10
- Fixes #11
- Fixes #12
- Differentiated between a missing ID which is the subject of an action (e.g. the subscription when moving a subscription) and other missing IDs (e.g. the folder when moving a subscription)
- Enforced same rules for subscription titles as for folder names, save that null is valid for subscriptions
- functions not related to user management now have the existence of the affected user checked in the authorizer, when the affected user differs from the actor
- User::authorizationEnabled() now nests: disabling twice and then enabling once leaves the authorizer disabled
- Disabling of the authorizer is now tested
- User tests now use a partial mock instead of relying on User::authorizationEnabled()
- Added authorizer tests against a missing user
- Removed folder tests related to missing users
- Also added more subscription tests
- Simplified folder removal; now properly relies on foreign keys for dependency resolution
- simplified *propertiesSet() methods by offloading input validation and query building to a generic function
- Implemented function to get the properties of a single folder (useful for internal use)
- Implemented a function to set the properties of a folder
