Plugin, Tests, Overhaul, Many more features

[zeroasterisk]

I merged your project with my own implementation of something similar...

I decided that this was worthwhile, benefiting from the "best of both" implementations.

• Now a Plugin (easier install, better isolation)
• Now you can pass in more settings, including your own custom contain and saveAllOptions
• Now more effectively recursive (resilient even if the behavior isn't setup on recursed models)
• Now you can inject (via Hash::merge & Hash::insert) before save - useful for data ceanup
• Now you can use your own custom copyPrepareDataCustom() method to custom-clean data if needed
• Now a few more methods are public, for possible direct usefulness and for easier testing (see README)
• Now tested...

$ ./cake test Copyable Model/Behavior/CopyableBehavior
---------------------------------------------------------------
CakePHP Test Shell
---------------------------------------------------------------
PHPUnit 3.7.38 by Sebastian Bergmann.

............

Time: 1.62 seconds, Memory: 22.25Mb

OK (12 tests, 98 assertions)

Details

• added unit testing for CopyableBehavior
• switched to passing through the $record/$data vs keeping on Behavior
• switched to passing through the $contain vs keeping on Behavior
• switched to more dynamic settings - allows more recursion
  onto Models which don't have this Behavior setup/configured
• switched to "sticky" settings - when used via copy()
  this takes priority over defaults, but not over per-Model settings
• added support for custom settings for $contain (if set, does not generate)
• added support for custom settings for $saveAllOptions
• replaced old public generateContain() with copyGenerateContain()
  renamed to match public method "psuedo-namespacing" - prefixed w/ "copy"
  old alias retained for backwards compatibilty
• exposed new public copyFindData() which does our lookup
• exposed new public copyPrepareData() which does our conversion
• exposed new public copySaveAll() which does our save
• exposed new $Model->copyData array, for inspection of data before and after conversion
• now we support data injection via merge or insert
• put in default, empty settings for ^
• replaced $data with $record for consistency

[zeroasterisk]

@rchavik @jamienay I'd appreciate a review if you wanna take a look