feat(fediverse): implement activitypub protocols + update user interface

- add "ActivityPub" library to handle server to server federation and basic
  client to server protocols using activitypub:
  - add webfinger endpoint to look for actor
  - add actor definition with inbox / outbox / followers
  - remote follow an actor
  - create notes with possible preview cards
  - interract with favourites, reblogs and replies
  - block incoming actors and/or domains
  - broadcast/schedule activities to fediverse followers using a cron task
- For castopod, the podcast is the actor:
  - overwrite the activitypub library for castopod's specific needs
  - perform basic interactions administrating a podcast to interact with fediverse users:
    - create notes with episode attachment
    - favourite and share a note + reply
    - add specific castopod_namespaces for podcasts and episodes definitions
- overwrite CodeIgniter's Route service to include alternate-content option for
  activitystream requests
- update episode publication logic:
  - remove publication inputs in create / edit episode form
  - publish / schedule or unpublish an episode after creation
  - the podcaster publishes a note when publishing an episode
- Javascript / Typescript modules:
  - fix Dropdown.ts to keep dropdown menu in foreground
  - add Modal.ts for funding links modal
  - add Toggler.ts to toggle various css states in ui
- User Interface:
  - update tailwindcss to v2
  - use castopod's pine and rose colors
  - update public layout to a 3 column layout
  - add pages in public for podcast activity, episode list and notes
  - update episode page to include linked notes
  - remove previous and next episodes from episode pages
  - show different public views depending on whether user is authenticated or not
  - use Kumbh Sans and Montserrat fonts
- update CodeIgniter's config files
- with CodeIgniter's new requirements, update docker environments are now based on
  php v7.3 image
- move Image entity to Libraries
- update composer and npm packages to latest versions

closes #69 #65 #85, fixes #51 #91 #92 #88

app/Models/AnalyticsWebsiteByRefererModel.php

@@ -34,19 +34,19 @@ class AnalyticsWebsiteByRefererModel extends Model
     {
         if (!($found = cache("{$podcastId}_analytics_website_by_referer"))) {
             $oneWeekAgo = date('Y-m-d', strtotime('-1 week'));
-            $found = $this->select('`referer_url` as `labels`')
-                ->selectSum('`hits`', '`values`')
+            $found = $this->select('referer_url as labels')
+                ->selectSum('hits', 'values')
                 ->where([
-                    '`podcast_id`' => $podcastId,
-                    '`date` >' => $oneWeekAgo,
+                    'podcast_id' => $podcastId,
+                    'date >' => $oneWeekAgo,
                 ])
-                ->groupBy('`labels`')
-                ->orderBy('`values`', 'DESC')
+                ->groupBy('labels')
+                ->orderBy('values', 'DESC')
                 ->findAll();
             cache()->save(
                 "{$podcastId}_analytics_website_by_referer",
                 $found,
-                600
+                600,
             );
         }
         return $found;
@@ -66,20 +66,20 @@ class AnalyticsWebsiteByRefererModel extends Model
         ) {
             $oneWeekAgo = date('Y-m-d', strtotime('-1 week'));
             $found = $this->select(
-                'SUBSTRING_INDEX(`domain`, \'.\', -2) as `labels`'
+                'SUBSTRING_INDEX(domain, \'.\', -2) as labels',
             )
-                ->selectSum('`hits`', '`values`')
+                ->selectSum('hits', 'values')
                 ->where([
-                    '`podcast_id`' => $podcastId,
-                    '`date` >' => $oneWeekAgo,
+                    'podcast_id' => $podcastId,
+                    'date >' => $oneWeekAgo,
                 ])
-                ->groupBy('`labels`')
-                ->orderBy('`values`', 'DESC')
+                ->groupBy('labels')
+                ->orderBy('values', 'DESC')
                 ->findAll();
             cache()->save(
                 "{$podcastId}_analytics_website_by_domain_weekly",
                 $found,
-                600
+                600,
             );
         }
         return $found;
@@ -99,20 +99,20 @@ class AnalyticsWebsiteByRefererModel extends Model
         ) {
             $oneYearAgo = date('Y-m-d', strtotime('-1 year'));
             $found = $this->select(
-                'SUBSTRING_INDEX(`domain`, \'.\', -2) as `labels`'
+                'SUBSTRING_INDEX(domain, \'.\', -2) as labels',
             )
-                ->selectSum('`hits`', '`values`')
+                ->selectSum('hits', 'values')
                 ->where([
-                    '`podcast_id`' => $podcastId,
-                    '`date` >' => $oneYearAgo,
+                    'podcast_id' => $podcastId,
+                    'date >' => $oneYearAgo,
                 ])
-                ->groupBy('`labels`')
-                ->orderBy('`values`', 'DESC')
+                ->groupBy('labels')
+                ->orderBy('values', 'DESC')
                 ->findAll();
             cache()->save(
                 "{$podcastId}_analytics_website_by_domain_yearly",
                 $found,
-                600
+                600,
             );
         }
         return $found;