Add ability for an administrator to remove any video (#61)

* Add ability for an admin to remove every video on the pod.

* Server: add BlacklistedVideos relation.

* Server: Insert in BlacklistedVideos relation upon deletion of a video.

* Server: Modify BlacklistedVideos schema to add Pod id information.

* Server: Moving insertion of a blacklisted video from the `afterDestroy` hook into the process of deletion of a video.

To avoid inserting a video when it is removed on its origin pod.
When a video is removed on its origin pod, the `afterDestroy` hook is fire, but no request is made on the delete('/:videoId') interface.
Hence, we insert into `BlacklistedVideos` only on request on delete('/:videoId') (if requirements for insertion are met).

* Server: Add removeVideoFromBlacklist hook on deletion of a video.

We are going to proceed in another way :).
We will add a new route : /:videoId/blacklist to blacklist a video.
We do not blacklist a video upon its deletion now (to distinguish a video blacklist from a regular video delete)
When we blacklist a video, the video remains in the DB, so we don't have any concern about its update. It just doesn't appear in the video list.
When we remove a video, we then have to remove it from the blacklist too.
We could also remove a video from the blacklist to 'unremove' it and make it appear again in the video list (will be another feature).

* Server: Add handler for new route post(/:videoId/blacklist)

* Client: Add isBlacklistable method

* Client: Update isRemovableBy method.

* Client: Move 'Delete video' feature from the video-list to the video-watch module.

* Server: Exclude blacklisted videos from the video list

* Server: Use findAll() in BlacklistedVideos.list() method

* Server: Fix addVideoToBlacklist function.

* Client: Add blacklist feature.

* Server: Use JavaScript Standard Style.

* Server: In checkUserCanDeleteVideo, move the callback call inside the db callback function

* Server: Modify BlacklistVideo relation

* Server: Modifiy Videos methods.

* Server: Add checkVideoIsBlacklistable method

* Server: Rewrite addVideoToBlacklist method

* Server: Fix checkVideoIsBlacklistable method

* Server: Add return to addVideoToBlacklist method

1 files changed, 89 insertions, 0 deletions

diff --git a/server/models/video-blacklist.js b/server/models/video-blacklist.js
new file mode 100644
index 000000000..02ea15760
--- /dev/null
+++ b/server/models/video-blacklist.js
@@ -0,0 +1,89 @@
+'use strict'
+
+const modelUtils = require('./utils')
+
+// ---------------------------------------------------------------------------
+
+module.exports = function (sequelize, DataTypes) {
+  const BlacklistedVideo = sequelize.define('BlacklistedVideo',
+    {},
+    {
+      indexes: [
+        {
+          fields: [ 'videoId' ],
+          unique: true
+        }
+      ],
+      classMethods: {
+        associate,
+
+        countTotal,
+        list,
+        listForApi,
+        loadById,
+        loadByVideoId
+      },
+      instanceMethods: {
+        toFormatedJSON
+      },
+      hooks: {}
+    }
+  )
+
+  return BlacklistedVideo
+}
+
+// ------------------------------ METHODS ------------------------------
+
+function toFormatedJSON () {
+  return {
+    id: this.id,
+    videoId: this.videoId,
+    createdAt: this.createdAt
+  }
+}
+
+// ------------------------------ STATICS ------------------------------
+
+function associate (models) {
+  this.belongsTo(models.Video, {
+    foreignKey: 'videoId',
+    onDelete: 'cascade'
+  })
+}
+
+function countTotal (callback) {
+  return this.count().asCallback(callback)
+}
+
+function list (callback) {
+  return this.findAll().asCallback(callback)
+}
+
+function listForApi (start, count, sort, callback) {
+  const query = {
+    offset: start,
+    limit: count,
+    order: [ modelUtils.getSort(sort) ]
+  }
+
+  return this.findAndCountAll(query).asCallback(function (err, result) {
+    if (err) return callback(err)
+
+    return callback(null, result.rows, result.count)
+  })
+}
+
+function loadById (id, callback) {
+  return this.findById(id).asCallback(callback)
+}
+
+function loadByVideoId (id, callback) {
+  const query = {
+    where: {
+      videoId: id
+    }
+  }
+
+  return this.find(query).asCallback(callback)
+}