Move schema and turnstile into sep files, rename stream method, remove utils

src/schema.ts

@@ -0,0 +1,41 @@
+import { z } from 'zod';
+
+export const tmdbIdSchema = z.string().regex(/^\d+$/);
+
+export const mediaSchema = z
+  .discriminatedUnion('type', [
+    z.object({
+      type: z.literal('movie'),
+      title: z.string().min(1),
+      releaseYear: z.coerce.number().int().gt(0),
+      tmdbId: tmdbIdSchema,
+    }),
+    z.object({
+      type: z.literal('show'),
+      title: z.string().min(1),
+      releaseYear: z.coerce.number().int().gt(0),
+      tmdbId: tmdbIdSchema,
+      episodeNumber: z.coerce.number().int(),
+      episodeTmdbId: tmdbIdSchema,
+      seasonNumber: z.coerce.number().int(),
+      seasonTmdbId: tmdbIdSchema,
+    }),
+  ])
+  .transform((query) => {
+    if (query.type == 'movie') return query;
+
+    return {
+      type: query.type,
+      title: query.title,
+      releaseYear: query.releaseYear,
+      tmdbId: query.tmdbId,
+      episode: {
+        number: query.episodeNumber,
+        tmdbId: query.episodeTmdbId,
+      },
+      season: {
+        number: query.seasonNumber,
+        tmdbId: query.seasonTmdbId,
+      },
+    };
+  });