refactor: deduplicate runtime validation into shared module

static/player/validate.ts

@@ -0,0 +1,47 @@
+import type { ModeSource, SkipSegment } from "./types";
+
+export const isRecord = (v: unknown): v is Record<string, unknown> =>
+  typeof v === "object" && v !== null && !Array.isArray(v);
+
+export const isStringArray = (v: unknown): v is string[] =>
+  Array.isArray(v) && v.every((item) => typeof item === "string");
+
+export const isSubtitleItemArray = (v: unknown): v is { lang: string; token: string }[] =>
+  Array.isArray(v) &&
+  v.every(
+    (item) => isRecord(item) && typeof item.lang === "string" && typeof item.token === "string",
+  );
+
+export const parseModeSources = (v: unknown): Record<string, ModeSource> => {
+  if (!isRecord(v)) return {};
+  const out: Record<string, ModeSource> = {};
+  for (const [key, value] of Object.entries(v)) {
+    if (!isRecord(value)) continue;
+    if (typeof value.token !== "string" || value.token === "") continue;
+    const subtitles = value.subtitles == null ? [] : value.subtitles;
+    if (!isSubtitleItemArray(subtitles)) continue;
+    const qualities = value.qualities;
+    out[key] = {
+      token: value.token,
+      type: typeof value.type === "string" ? value.type : undefined,
+      subtitles,
+      qualities: isStringArray(qualities) ? qualities : undefined,
+    };
+  }
+  return out;
+};
+
+export const parseSegments = (v: unknown): SkipSegment[] => {
+  if (!Array.isArray(v)) return [];
+  const out: SkipSegment[] = [];
+  for (const item of v) {
+    if (!isRecord(item)) continue;
+    const type = typeof item.type === "string" ? item.type : "";
+    const start = typeof item.start === "number" ? item.start : Number(item.start);
+    const end = typeof item.end === "number" ? item.end : Number(item.end);
+    const source = typeof item.source === "string" ? item.source : undefined;
+    if (!type || !Number.isFinite(start) || !Number.isFinite(end)) continue;
+    out.push({ type, start, end, source });
+  }
+  return out;
+};