Wrap twitterservice's TwitterOauth vendor's OAuth include in class_exists()

[jricher]

Elgg 1.7.4 is incompatible with the community OAuth plugin, as the included libraries redefine several of the OAuth classes. If both plugins are enabled simultaneously, the site crashes.

Commenting out the call to include OAuth.php in the twitterOAuth.php file gets rid of the error, but I haven't done a full functionality test yet.

Ideally, the Twitter client should use the existing OAuth plugin for its library support. I don't see any reason in the code that it can't. I can look into what this would take and submit a patch back later, if there's interest in that solution.

[cash]

This needs to be fixed for Elgg 1.8. In the mean time how about releasing a version of the OAuth plugin that uses class_exists()?

[brettp]

The ​Oauth plugin on community requires another 3rd party plugin and does too much to be considered a library plugin. Nick's discussed with Justin about creating a plugin that only includes the libraries, and other plugins needing OAuth would list that library plugin as a requirement. This is the solution for 1.8.

The solution for 1.7 is using class_exists() before , preferably in both plugins.

[brettp]

(In [svn:7413]) Fixes #2565: Wrapped twitterOAuth's include for OAuth in class_exists().