* Add MVP of notification subscriptions
* Add rate limiting for notification subscriptions
* Show modal for logged out users on subscribe click
* Add enter key functionality for checkbox
* Add relationships for notification subscriptions
* Add model test for notification subscription
* Deprecated article mutes in favor of notification subscriptions
* Deprecated comment mutes in favor of notification subscriptions
* Move comment muting tests and logic over
* Merge comment and article muting into subscriptions
* Remove redundant check
* Use database to check for rate limit instead of cache
* Test for subscriptions handling notifications properly
* Fix notification model spec for subscriptions
* Fix tests for subscriptions
* Remove rate limiting
* Properly handle logged out users getting subscription status
* Fix test for new pattern
* Update reserved words
* Add config column to notification subscriptions
* Add logic for top level config and move tests
* Test for top level subscribers getting notified
* Fix logic mistake oops
* Add index and refactor comment_user_ids
* Add /stats endpoint for articles, opened only to Pro users
* Add analytics to article stats page
* Add stats button to the article page and test stats page
* Notifications unique indexes that take null values into account
* Specify import options for reaction notifications according to the indexes
* Fix specs: notifications have either user_id or organization_id
* Create notifications indexes concurrently
* Podcasts validations
* Added db constraints for podcast_episodes
* Validate podcast slug uniqueness with usernames and org slugs
* Validate podcast slug uniqueness only if it was changed
* Implemented ActiveJob for Mention#send_email_notification
* Implemented ActiveJob for Mention.create_all
* Fixed args while calling the job
* Changes as per the review
* Fix JS lint issues
* Do not rely on globals
* Use InstantClick to make transitions work in the pro dashboard
* Fix eager loadings and remove unused queries
* Refactor drawChart
* More consistency in naming
* Display correct analytics for organization
* Use proper auth chain before checking parameters
* Refactor AnalyticsController
* Add a bunch of test and rewrite reactions counts with a single query
* Add tests for follows totals
* Use round and add more refactoring
* Add tests to group by day to fallback during refactoring
* Use group by to calculate comments count by day
* Use group by to calculate follows count by day
* Use group by to calculate reactions stats by day
* Use group by to calculate page_views stats by day
* Move calculations per day back in the cached block
* Add a few comments and a little bit of refactoring
* Add indexes (concurrently) for analytics
* Make tests more time robust
* Use a date range cache related to the requesting user or org
* Freezing time in UTC should help when tests are ran on time zones over the day line
* Remove explicit returns
* Page title is escaped, guard against that
* Move Analytics service spec in the proper place
