SIBS iOS and C++ SDK Challenge

This challenge is based on the following requirements:

Book Store

Book Store consists on a simple 2-column list of available books about mobile development. Using google’s api for books, the app should fetch and display the Thumbnail of a few books at a time and load more as the user scroll’s through the list. References:
- Rest API
- Example API Call
The list should also have a button to filter/show only books that the user has set as favorite.
When the user clicks on one of the books, the app should present a detailed view displaying the most relevant information of the book: Title, Author, Description and, if available, a Buy link.
In the detail view, the user can also favorite or “unfavorite” a book. This option should be stored locally so it persists through each app usage.
Clicking on the Buy link should open the link on safari/chrome.

This app must be build following this rules:

All the API integrations must be built using C++.
1. The app should call this api method and receive a callback with the API result (a json object or an error).
An APP built using Objective-c/Java that import and use those C++ class.
It is very important show your experience with testing;

Nice to have:

All the requirements for the challenge where match:

API integration built with C++, libcurl and jsoncpp(for parsing)
Favorites storage built with C++ and sqlite3
Home screen which recycle every UICollecitonViewCell when they leave screen and loads more items when the user reaches the end of the listing
Details screen with favorite button and buy button (if buyLink is available)
Favorites screen listing from local storage
Unit tests for Favorites local storage