Add video file metadata to download modal, via ffprobe (#2411)

* Add video file metadata via ffprobe

* Federate video file metadata

* Add tests for file metadata generation

* Complete tests for videoFile metadata federation

* Lint migration and video-file for metadata

* Objectify metadata from getter in ffmpeg-utils

* Add metadataUrl to all videoFiles

* Simplify metadata API middleware

* Load playlist in videoFile when requesting metadata

server/models/utils.ts

@@ -3,6 +3,23 @@ import validator from 'validator'
 import { Col } from 'sequelize/types/lib/utils'
 import { literal, OrderItem } from 'sequelize'
 
+type Primitive = string | Function | number | boolean | Symbol | undefined | null
+type DeepOmitHelper<T, K extends keyof T> = {
+  [P in K]: // extra level of indirection needed to trigger homomorhic behavior
+  T[P] extends infer TP // distribute over unions
+    ? TP extends Primitive
+      ? TP // leave primitives and functions alone
+      : TP extends any[]
+        ? DeepOmitArray<TP, K> // Array special handling
+        : DeepOmit<TP, K>
+    : never
+}
+type DeepOmit<T, K> = T extends Primitive ? T : DeepOmitHelper<T, Exclude<keyof T, K>>
+
+type DeepOmitArray<T extends any[], K> = {
+  [P in keyof T]: DeepOmit<T[P], K>
+}
+
 type SortType = { sortModel: string, sortValue: string }
 
 // Translate for example "-name" to [ [ 'name', 'DESC' ], [ 'id', 'ASC' ] ]
@@ -193,6 +210,7 @@ function buildDirectionAndField (value: string) {
 // ---------------------------------------------------------------------------
 
 export {
+  DeepOmit,
   buildBlockedAccountSQL,
   buildLocalActorIdsIn,
   SortType,