• Apache CouchDB 1.6.1
• A current version of NodeJS or io.js

• Create an admin user (see http://docs.couchdb.org/en/1.6.1/intro/security.html#authentication).
• Enable CORS (see http://docs.couchdb.org/en/1.6.1/config/http.html#config-cors).
• Create a local database named feeds, and replicate the remote database http://couchplanet.org:5984/feeds to it.
• cd feeds_app
• npm install
• npm install -g couch-push (see https://www.npmjs.com/package/couch-push)
• couch-push http://admin:secret@localhost:5984/feeds ./couch (make sure to replace admin and secret with your admin user's name and password here)
• npm run server

The following exercises are supposed to be performed on the feeds app, which is located in the feeds_app directory. See the installation instructions above.

Write a document validate document update function that prevents non-admins from deleting documents. Store the function in couch/validate_doc_update.js, and push it to your feeds database by using couch-push the same way you did when installing the app (see above).

See http://docs.couchdb.org/en/1.6.1/couchapp/ddocs.html#vdufun.

On the lower left corner of the page, there is a "Load more articles"-button, which has no functionality attached to it yet, however. When the button is clicked, load the next eight articles, sorted in descending by their postedTime timestamp key order, by using the recent_articles view that is already included.

See http://docs.couchdb.org/en/1.6.1/api/ddoc/views.html, and http://docs.couchdb.org/en/1.6.1/couchapp/views/pagination.html.

On the lower right corner of each article, there is a white star, which is supposed to be used as "Favorite"- or "Unfavorite"-button, respectively. It has no functionality attached to it yet, however. When an article has been marked as favorite, a black star should be displayed instead of a white one. It should be possible to revert a favorite, i.e., unmark a favorite article.

See http://docs.couchdb.org/en/1.6.1/api/document/common.html.

See validate_doc_update branch.

See load-more-articles branch.

See favorites branch.

See advanced-favorites branch.