Allow people to "favorite" individual projects

[jenlampton]

I think the ability to "favorite" modules might fit this criteria and be useful. Just a way for folks to show that they like a specific module and a way to generate a list of "most popular" modules that is different from pure usage statistics. This would not allow for any negative feedback and would be quite simple. Not to mention, it's easy to implement with the flag module and nothing else.

TODO:

MVP

• install flag module
• set up "Favorite" flag configuration (nodes of type module, theme, layout) and permissions
• display a flag toggle link on each project page (in the sidebar?)
• add a count for how many people favorited an individual project, and display this on the project page

Better product

• Create a view of most popular projects, with 4 displays:
  * (Default) popular everything
  * popular modules : filter for type = project_module
  * popular themes : + filter for type = project_theme
  * popular layouts : + filter for type = project_layout
  * popular everything + contextual filter for uid
• Create a page at /add-ons/most-popular that contains the module, theme, and layout blocks
• display view of favorite each person's modules for on their profile

Nice to have

• add popularity as a sort criteria on the project listing pages
• add popularity into the project feed (and then also the core installer module)

[olafgrabienski]

Great idea, like it!

The term 'popular(ity)' is however quite ambiguous, in my opinion. Probably many will think at first sight, that being popular refers to the number of installations. Not sure about an alternative. I guess, 'favorability' is not ideal.