Redirect on Error

[Michael-Stokoe]

A project I'm working on requires that the user be redirected back to my application if the user hits cancel in Xero's OAuth.

Luckily this is handled nicely by a request parameter.

See "Redirect on Error", here.

I've added the parameter to the Xero class and defaulted it to false.

Usage is pretty simple:

    $api = new XeroApi();
    $api->setRedirectOnError(true);

Now if the Xero part of OAuth fails for any reason (User hits cancel, can't remember password etc.), Xero will redirect us back to the application's callback url.

[coveralls]

Coverage decreased (-2.5%) to 97.521% when pulling 61fd29c on consilience:master into dfa6b5b on Invoiced:master.

[coveralls]

Coverage decreased (-2.5%) to 97.521% when pulling 61fd29c on consilience:master into dfa6b5b on Invoiced:master.

[coveralls]

Coverage decreased (-0.8%) to 99.18% when pulling 78d7ebd on consilience:master into ea1af9f on Invoiced:master.

[Michael-Stokoe]

Travis error was a composer error, unrelated to this PR, I believe.

[jaredtking]

Thank you for the contribution! Can you add a test case for when the redirectOnError parameter is used?

[Michael-Stokoe]

No problem.

I realised after coveralls reported -2.5% C.C. that I hadn't included any tests with it. Been a pretty busy day but I'll get it sorted. Cheers.

[Michael-Stokoe]

Sorry it's taken me so long to get around to it, I'm sure you know how it is 😅

[Michael-Stokoe]

Sorry about that. I had to remove a typehint to get the PHP5.6 tests to pass.

[jaredtking]

Thank you for the PR! Can you add a test case for urlAuthorization() when the redirectOnError parameter is enabled?