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Consumers\n * should never call `escapeXml` directly.\n */\n\nconst XML_ENTITY = new Map([\n ['&', '&'],\n ['<', '<'],\n ['>', '>'],\n ['\"', '"'],\n [\"'\", '''],\n])\n\n// Disallowed XML 1.0 control chars: U+0000-U+001F EXCEPT \\t (U+0009),\n// \\n (U+000A), \\r (U+000D). Biome's noControlCharactersInRegex rule\n// requires Unicode escape sequences here rather than literal bytes.\n// biome-ignore lint/suspicious/noControlCharactersInRegex: XML 1.0 spec requires stripping these control chars\nconst CONTROL_CHARS_RE = /[\\u0000-\\u0008\\u000B\\u000C\\u000E-\\u001F]/g\nconst XML_ENTITY_RE = /[&<>\"']/g\nconst CDATA_TERMINATOR_RE = /]]>/g\n\n/**\n * Escape a string for safe embedding in XML element content OR attribute values.\n *\n * Pipeline (order matters):\n * 1. Strip control chars U+0000-U+001F EXCEPT `\\t` (U+0009), `\\n` (U+000A),\n * `\\r` (U+000D). Stripping first prevents emitting broken entities.\n * 2. Replace the 5 XML special characters with named entities.\n * 3. Defense-in-depth: escape any residual `]]>` sequence to `]]>`. After\n * step 2 the literal `]]>` cannot exist (the `>` is gone), so this is a\n * no-op in practice — it stands as a safety net against future edits.\n *\n * NOT for use on JSON content — `JSON.stringify` handles JSON escaping\n * natively and applying this would double-escape literal `<` characters.\n */\nexport function escapeXml(input: string): string {\n return input\n .replace(CONTROL_CHARS_RE, '')\n .replace(XML_ENTITY_RE, (c) => XML_ENTITY.get(c) ?? c)\n .replace(CDATA_TERMINATOR_RE, ']]>')\n}\n","import type { AnnouncementConfig } from '../types/announcement'\nimport { escapeXml } from './escape'\n\n/**\n * Public, JSON-serializable changelog entry used by `serializeFeed`.\n *\n * Extends `AnnouncementConfig` with publish-time metadata. Reuses the\n * announcement shape so a config that already drives an in-app modal can\n * simultaneously be syndicated as RSS/JSON Feed.\n */\nexport interface ChangelogEntry extends AnnouncementConfig {\n /**\n * Stable publish timestamp. Accepts a `Date` or any `Date`-parseable string\n * (ISO 8601 recommended). Invalid values cause `serializeFeed` to throw a\n * `TypeError` rather than emitting `Invalid Date` into the feed.\n */\n publishedAt: Date | string\n\n /**\n * Absolute URL of the canonical changelog page for this entry. Used as\n * the RSS `` and the JSON Feed `url` field.\n */\n permalink: string\n\n /**\n * Optional category tag (e.g. `'feature'`, `'fix'`). Surfaces as ``\n * in RSS and `tags: [category]` in JSON Feed.\n */\n category?: string\n\n /**\n * Optional rendered HTML body. Emitted only as JSON Feed `content_html`;\n * RSS `` always uses the plain-string `description` field\n * (never raw HTML, to keep the entity-escape contract intact).\n */\n contentHtml?: string\n}\n\n/**\n * Publisher-level metadata applied once per feed.\n *\n * `feedUrl` is the base URL of the changelog feed routes; the serializer\n * appends `.xml` for the RSS self-link and `.json` for the JSON Feed\n * `feed_url`. Example: `'https://acme.com/changelog'` → routes\n * `https://acme.com/changelog.xml` and `https://acme.com/changelog.json`.\n */\nexport interface SerializeFeedOptions {\n title: string\n description: string\n siteUrl: string\n feedUrl: string\n language?: string\n copyright?: string\n}\n\n/**\n * Pure, side-effect-free RSS 2.0 + JSON Feed 1.1 serializer.\n *\n * Throws `TypeError` when any entry has an invalid `publishedAt` — fail-fast\n * to avoid emitting `Invalid Date` strings into a live feed.\n */\nexport function serializeFeed(\n entries: ChangelogEntry[],\n opts: SerializeFeedOptions\n): { rss: string; jsonFeed: string } {\n for (const e of entries) {\n validateDate(e.publishedAt, e.id)\n }\n return {\n rss: serializeRss(entries, opts),\n jsonFeed: serializeJsonFeed(entries, opts),\n }\n}\n\nfunction validateDate(input: Date | string, entryId: string): Date {\n const d = new Date(input)\n if (Number.isNaN(d.getTime())) {\n throw new TypeError(`serializeFeed: invalid publishedAt for entry \"${entryId}\"`)\n }\n return d\n}\n\nfunction serializeRss(entries: ChangelogEntry[], opts: SerializeFeedOptions): string {\n const items = entries\n .map((e) => {\n const title = escapeXml(typeof e.title === 'string' ? e.title : '')\n const desc = escapeXml(typeof e.description === 'string' ? e.description : '')\n const cat = e.category ? `${escapeXml(e.category)}` : ''\n return `\n ${title}\n ${escapeXml(e.permalink)}\n ${escapeXml(e.id)}\n ${new Date(e.publishedAt).toUTCString()}\n ${desc}\n ${cat}\n`\n })\n .join('\\n')\n\n return `\n\n\n ${escapeXml(opts.title)}\n ${escapeXml(opts.siteUrl)}\n ${escapeXml(opts.description)}\n ${escapeXml(opts.language ?? 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[e.category] : undefined,\n })),\n },\n null,\n 2\n )\n}\n","import type { MediaSlotProps } from '@tour-kit/media'\nimport type { AnnouncementMedia } from '../types/announcement'\n\nconst ASPECT_RATIOS = ['16/9', '4/3', '1/1', '9/16', '21/9', 'auto'] as const\ntype AspectRatio = (typeof ASPECT_RATIOS)[number]\n\nfunction isAspectRatio(value: string | undefined): value is AspectRatio {\n return value !== undefined && (ASPECT_RATIOS as readonly string[]).includes(value)\n}\n\n/**\n * Convert `AnnouncementMedia` into the strict `MediaSlotProps` shape that\n * `` expects.\n *\n * `AnnouncementMedia.aspectRatio` is typed `string` (broad) for legacy\n * reasons; `MediaSlotProps.aspectRatio` is the narrow `AspectRatio` union.\n * This adapter narrows via runtime guard so all announcement variants honor\n * the field consistently.\n */\nexport function toMediaSlotProps(m: AnnouncementMedia): MediaSlotProps {\n return {\n src: m.src,\n type: m.type,\n alt: m.alt,\n poster: m.poster,\n aspectRatio: isAspectRatio(m.aspectRatio) ? m.aspectRatio : undefined,\n autoplay: m.autoplay,\n loop: m.loop,\n muted: m.muted,\n }\n}\n"]}