Initial Commit

shared/utils/twitch.ts

@@ -0,0 +1,68 @@
+export interface TwitchTarget {
+  kind: 'video' | 'channel' | 'clip'
+  id: string
+}
+
+// Twitch-Pfade, die keine Kanalnamen sind
+const RESERVED_PATHS = new Set([
+  'directory', 'downloads', 'drops', 'friends', 'inventory', 'jobs', 'messages',
+  'moderator', 'notifications', 'p', 'payments', 'popout', 'products', 'settings',
+  'subscriptions', 'turbo', 'videos', 'wallet', 'broadcast', 'search', 'activate',
+])
+
+export function getTwitchTarget(href: string): TwitchTarget | null {
+  try {
+    const url = new URL(href)
+    const host = url.hostname.replace(/^(www\.|m\.)/, '')
+
+    // clips.twitch.tv/{slug}
+    if (host === 'clips.twitch.tv') {
+      const slug = url.pathname.split('/').filter(Boolean)[0]
+      return slug ? { kind: 'clip', id: slug } : null
+    }
+
+    if (host !== 'twitch.tv') return null
+    const seg = url.pathname.split('/').filter(Boolean)
+
+    // twitch.tv/videos/{id}
+    if (seg[0] === 'videos' && /^\d+$/.test(seg[1] ?? '')) {
+      return { kind: 'video', id: seg[1]! }
+    }
+    // twitch.tv/{channel}/clip/{slug}
+    if (seg.length === 3 && seg[1] === 'clip') {
+      return { kind: 'clip', id: seg[2]! }
+    }
+    // twitch.tv/{channel}
+    if (seg.length === 1 && /^[\w]{2,25}$/.test(seg[0]!) && !RESERVED_PATHS.has(seg[0]!.toLowerCase())) {
+      return { kind: 'channel', id: seg[0]! }
+    }
+    return null
+  }
+  catch {
+    return null
+  }
+}
+
+export function serializeTwitchTarget(t: TwitchTarget | null): string | null {
+  return t ? `${t.kind}:${t.id}` : null
+}
+
+export function parseTwitchTarget(value: string): TwitchTarget | null {
+  const i = value.indexOf(':')
+  if (i < 0) return null
+  const kind = value.slice(0, i)
+  const id = value.slice(i + 1)
+  if ((kind !== 'video' && kind !== 'channel' && kind !== 'clip') || !id) return null
+  return { kind, id }
+}
+
+// Twitch-Embeds brauchen zwingend ?parent=<Hostname der einbettenden Seite>
+export function twitchEmbedUrl(target: TwitchTarget | string | null, parent: string): string | null {
+  const t = typeof target === 'string' ? parseTwitchTarget(target) : target
+  if (!t) return null
+  const p = `parent=${encodeURIComponent(parent)}`
+  const id = encodeURIComponent(t.id)
+  if (t.kind === 'clip') return `https://clips.twitch.tv/embed?clip=${id}&${p}&autoplay=false`
+  if (t.kind === 'channel') return `https://player.twitch.tv/?channel=${id}&${p}`
+  return `https://player.twitch.tv/?video=${id}&${p}&autoplay=false`
+}