43 lines
1.3 KiB
TypeScript
43 lines
1.3 KiB
TypeScript
/** Parsed imeta entry from NIP-94 tags. */
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export interface ImetaEntry {
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url: string;
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thumbnail?: string;
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mime?: string;
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/** Summary text (used as webxdc app name for webxdc attachments). */
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summary?: string;
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/** Webxdc session UUID — present when the attachment is a stateful webxdc app. */
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webxdc?: string;
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/** Pixel dimensions from NIP-94 `dim` tag, e.g. "1280x720". */
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dim?: string;
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/** Blurhash placeholder from NIP-94 `blurhash` tag. */
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blurhash?: string;
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}
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/** Parse all imeta tags into a map keyed by URL. Works for any event kind. */
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export function parseImetaMap(tags: string[][]): Map<string, ImetaEntry> {
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const map = new Map<string, ImetaEntry>();
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for (const tag of tags) {
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if (tag[0] !== 'imeta') continue;
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const entry: Record<string, string> = {};
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for (let i = 1; i < tag.length; i++) {
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const part = tag[i];
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const spaceIdx = part.indexOf(' ');
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if (spaceIdx === -1) continue;
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const key = part.slice(0, spaceIdx);
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const value = part.slice(spaceIdx + 1);
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entry[key] = value;
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}
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if (entry.url) {
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map.set(entry.url, {
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url: entry.url,
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thumbnail: entry.image,
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mime: entry.m,
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summary: entry.summary,
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webxdc: entry.webxdc,
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dim: entry.dim,
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blurhash: entry.blurhash,
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});
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}
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}
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return map;
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}
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