Add a static Mahara logo that can be picked up by Facebook

[Kristina Hoeppner]

When you share a Mahara page with Facebook, it may not pick up the logo but choose another image from the site. In order to tell FB which image should be used, the following could be implemented in the raw theme so that all pages get it:

https://developers.facebook.com/docs/share/

E.g. When you share the Mahara homepage (tested it with demo.mahara.org), you don't get the logo but other images that are on the page. If you share a link to a portfolio page, there is no logo and no information about the site but "Your browser does not have javascript enabled for this site. Mahara requires javascript to be enabled before you can log in".

If the following would be possible that would be great:

1. Always show the Mahara logo -> set that as the image to be used by Facebook. If other sites want to use a different image, they could exchange that in the raw theme, but at least we would have a default logo.

2. Check (and fix) what / where a short description of a site would need tobe put into the header so that it is picked up by Facebook even when sharing a portfolio page.

[Son Nguyen (ngson2000)]

The Share button has bee desprecated in flavour of Like button. I suggest we customize Mahara for this
https://developers.facebook.com/docs/reference/plugins/like/

[Kristina Hoeppner (kris-hoeppner)]

It's not about the Like button, but that the Mahara logo is picked up by Facebook and not a random image from the page.

[Hugh Davenport (hugh-davenport)]

https://reviews.mahara.org/1157

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/1157
Committed: http://gitorious.org/mahara/mahara/commit/24edf671d66ad92d0676d3f71d8f5a26c941341d
Submitter: Hugh Davenport (<email address hidden>)
Branch: master

commit 24edf671d66ad92d0676d3f71d8f5a26c941341d
Author: Son Nguyen <email address hidden>
Date: Fri Apr 13 12:23:43 2012 +1200

    Add a static Mahara logo that can be picked up by Facebook Bug#900529

    + Add default Mahara logo for Facebook share link
    + Add default Mahara description for Facebook share link

    Change-Id: I18839ceeef582ed30d83d17d2cde75825499a6ab
    Signed-off-by: Son Nguyen <email address hidden>

[Hugh Davenport (hugh-davenport)]

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