API: torrents: schema validate add-urls and add-files endpoints

Those endpoints use extensive amount of user-provided properties
and will be frequently used by third party developers. With Node
15, unhandled promise rejections directly crash the server, as
such, it is safer to schema validate the request before processing
it.

This change also prepares the code paths for later change that adds
destination fallbacks.

shared/schema/api/torrents.ts

@@ -0,0 +1,41 @@
+import {array, boolean, object, record, string} from 'zod';
+
+import type {infer as zodInfer} from 'zod';
+
+// POST /api/torrents/add-urls
+export const addTorrentByURLSchema = object({
+  // URLs to download torrents from
+  urls: array(string().url()).nonempty(),
+  // Cookies to attach to requests, arrays of strings in the format "name=value" with domain as key
+  cookies: record(array(string())).optional(),
+  // Path of destination
+  destination: string(),
+  // Tags
+  tags: array(string()).optional(),
+  // Whether destination is the base path [default: false]
+  isBasePath: boolean().optional(),
+  // Whether destination contains completed contents [default: false]
+  isCompleted: boolean().optional(),
+  // Whether to start torrent [default: false]
+  start: boolean().optional(),
+});
+
+export type AddTorrentByURLOptions = zodInfer<typeof addTorrentByURLSchema>;
+
+// POST /api/torrents/add-files
+export const addTorrentByFileSchema = object({
+  // Torrent files in base64
+  files: array(string()).nonempty(),
+  // Path of destination
+  destination: string(),
+  // Tags
+  tags: array(string()).optional(),
+  // Whether destination is the base path [default: false]
+  isBasePath: boolean().optional(),
+  // Whether destination contains completed contents [default: false]
+  isCompleted: boolean().optional(),
+  // Whether to start torrent [default: false]
+  start: boolean().optional(),
+});
+
+export type AddTorrentByFileOptions = zodInfer<typeof addTorrentByFileSchema>;