Currently, defining translations is quite cumbersome, and the translator
callback is passed to the constructor of multiple classes, which makes
it quite ugly and could make translations inconsistent.
This commit completely changes how translations are done in Validation.
Instead of using a callback, it uses a specific class, and `Validator`
will pass that object through the objects that render the messages.
There are a few "problems" with the current engine:
- Allowing each rule to execute assert() and check() means duplication
in some cases.
- Because we use exceptions to assert/check, we can only invert a
validation (with Not) if there are errors. That means that we have
limited granularity control.
- There is a lot of logic in the exceptions. That means that even after
it throws an exception, something could still happen. We're stable on
that front, but I want to simplify them. Besides, debugging exception
code is painful because the stack trace does not go beyond the
exception.
Apart from that, there are many limitations with templating, and working
that out in the current implementation makes it much harder.
These changes will improve the library in many aspects, but they will
also change the behavior and break backward compatibility. However,
that's a price I'm willing to pay for the improvements we'll have.
Signed-off-by: Henrique Moody <henriquemoody@gmail.com>
