Confirm Local Caching in Staging/Prod

[jterps08]

This was the original infinite scrolling and local caching work that we implemented... https://github.com/PowerlineApp/powerline-mobile/commit/e2d8a03a98ab9f3fc1cd0df9b91dc0f97834f027

I'm not sure why this prepare() was commented-out/removed by Erik. https://github.com/PowerlineApp/powerline-mobile/commit/4d66c633374be03bc48b251a31a0f01e1f4a8b82

We need to load only 10-15 items at a time and at initial load. And we need to leverage local caching. The newsfeed is jittery/sluggish until all items complete loading, so it would be good to figure out how to fix this for better user experience.

[devotebest]

@jterps08 https://api-dev.powerli.ne/api/v2/activities?page=1 This API returned 20 items.

[jterps08]

@devotebest ok, so we might want to change the return to 15 items @igaponov

@devotebest can you confirm we have local caching in the mobile app? We used to have it per the commit links I put above, but it may have been removed in the past. We need to have local caching so that the app isn't reloading the newsfeed when the user switches to a different app and comes back or switches to a different screen and comes back...

[devotebest]

@jterps08 I confirmed there is local caching in mobile app. https://github.com/PowerlineApp/powerline-mobile/blob/develop/www/js/services/activity.js#L47-L50

and https://github.com/PowerlineApp/powerline-mobile/commit/4d66c633374be03bc48b251a31a0f01e1f4a8b82 is old commit. prepare() function is added already. https://github.com/PowerlineApp/powerline-mobile/blob/develop/www/js/controllers/home.js#L77