Add publishedAt field for video model.

* New field added in the `video` table + migration script

* `publishedAt` updated to NOW when privacy changes from private to
  public/unlisted (default = NOW)

* Models updated to handle the new attribute

* Client interface updated to use `publishedAt` instead of `createdAt`
  except in My Account > My Videos view

4 files changed, 48 insertions, 3 deletions

diff --git a/server/controllers/api/videos/index.ts b/server/controllers/api/videos/index.ts
index 552e5edac..244099015 100644
--- a/server/controllers/api/videos/index.ts
+++ b/server/controllers/api/videos/index.ts
@@ -307,10 +307,17 @@ async function updateVideo (req: express.Request, res: express.Response) {
       if (videoInfoToUpdate.licence !== undefined) videoInstance.set('licence', videoInfoToUpdate.licence)
       if (videoInfoToUpdate.language !== undefined) videoInstance.set('language', videoInfoToUpdate.language)
       if (videoInfoToUpdate.nsfw !== undefined) videoInstance.set('nsfw', videoInfoToUpdate.nsfw)
-      if (videoInfoToUpdate.privacy !== undefined) videoInstance.set('privacy', parseInt(videoInfoToUpdate.privacy.toString(), 10))
       if (videoInfoToUpdate.support !== undefined) videoInstance.set('support', videoInfoToUpdate.support)
       if (videoInfoToUpdate.description !== undefined) videoInstance.set('description', videoInfoToUpdate.description)
       if (videoInfoToUpdate.commentsEnabled !== undefined) videoInstance.set('commentsEnabled', videoInfoToUpdate.commentsEnabled)
+      if (videoInfoToUpdate.privacy !== undefined) {
+        const newPrivacy = parseInt(videoInfoToUpdate.privacy.toString(), 10)
+        videoInstance.set('privacy', newPrivacy)
+
+        if (wasPrivateVideo === true && newPrivacy !== VideoPrivacy.PRIVATE) {
+          videoInstance.set('publishedAt', new Date())
+        }
+      }
 
       const videoInstanceUpdated = await videoInstance.save(sequelizeOptions)
 
diff --git a/server/initializers/constants.ts b/server/initializers/constants.ts
index 5152095b3..2622b2c71 100644
--- a/server/initializers/constants.ts
+++ b/server/initializers/constants.ts
@@ -12,7 +12,7 @@ let config: IConfig = require('config')
 
 // ---------------------------------------------------------------------------
 
-const LAST_MIGRATION_VERSION = 195
+const LAST_MIGRATION_VERSION = 200
 
 // ---------------------------------------------------------------------------
 
diff --git a/server/initializers/migrations/0200-video-published-at.ts b/server/initializers/migrations/0200-video-published-at.ts
new file mode 100644
index 000000000..edaf4a145
--- /dev/null
+++ b/server/initializers/migrations/0200-video-published-at.ts
@@ -0,0 +1,32 @@
+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+  transaction: Sequelize.Transaction,
+  queryInterface: Sequelize.QueryInterface,
+  sequelize: Sequelize.Sequelize
+}): Promise<void> {
+
+  {
+    const data = {
+      type: Sequelize.DATE,
+      allowNull: false,
+      defaultValue: Sequelize.NOW
+    }
+    await utils.queryInterface.addColumn('video', 'publishedAt', data)
+  }
+
+  {
+    const query = 'UPDATE video SET "publishedAt" = video."createdAt"'
+    await utils.sequelize.query(query)
+  }
+
+}
+
+function down (options) {
+  throw new Error('Not implemented.')
+}
+
+export {
+  up,
+  down
+}
diff --git a/server/models/video/video.ts b/server/models/video/video.ts
index 7c56c65a6..2a1226f6d 100644
--- a/server/models/video/video.ts
+++ b/server/models/video/video.ts
@@ -376,6 +376,11 @@ export class VideoModel extends Model<VideoModel> {
   @UpdatedAt
   updatedAt: Date
 
+  @AllowNull(false)
+  @Default(Sequelize.NOW)
+  @Column
+  publishedAt: Date
+
   @ForeignKey(() => VideoChannelModel)
   @Column
   channelId: number
@@ -968,6 +973,7 @@ export class VideoModel extends Model<VideoModel> {
       embedPath: this.getEmbedPath(),
       createdAt: this.createdAt,
       updatedAt: this.updatedAt,
+      publishedAt: this.publishedAt,
       account: {
         name: formattedAccount.name,
         displayName: formattedAccount.displayName,
@@ -1122,7 +1128,7 @@ export class VideoModel extends Model<VideoModel> {
       views: this.views,
       sensitive: this.nsfw,
       commentsEnabled: this.commentsEnabled,
-      published: this.createdAt.toISOString(),
+      published: this.publishedAt.toISOString(),
       updated: this.updatedAt.toISOString(),
       mediaType: 'text/markdown',
       content: this.getTruncatedDescription(),