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83 lines
3.3 KiB
83 lines
3.3 KiB
import { ExtendedKind, isMusicTrackKind, isNip71StyleVideoKind } from '@/constants' |
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import { getMusicTrackFromEvent, musicTrackDisplayLine } from '@/lib/music-track' |
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import { |
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getLiveEventMetadataFromEvent, |
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getLongFormArticleMetadataFromEvent |
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} from '@/lib/event-metadata' |
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import { tagNameEquals } from '@/lib/tag' |
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import { stripTrailingStringifiedNostrEvent } from '@/lib/nostr-event-json' |
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import { Event, kinds } from 'nostr-tools' |
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export const PARENT_REPLY_BLURB_MAX = 150 |
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/** Strip common markdown / asciidoc / HTML so parent reply strips stay one line (matches NotePage preview). */ |
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export function stripMarkupForPreview(content: string): string { |
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let text = stripTrailingStringifiedNostrEvent(content) |
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text = text.replace(/^#{1,6}\s+/gm, '') |
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text = text.replace(/\*\*([^*]+)\*\*/g, '$1') |
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text = text.replace(/\*([^*]+)\*/g, '$1') |
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text = text.replace(/\[([^\]]+)\]\([^)]+\)/g, '$1') |
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text = text.replace(/^=+\s+/gm, '') |
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text = text.replace(/_([^_]+)_/g, '$1') |
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text = text.replace(/```[\s\S]*?```/g, '') |
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text = text.replace(/`([^`]+)`/g, '$1') |
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text = text.replace(/<[^>]+>/g, '') |
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text = text.replace(/\n{3,}/g, '\n\n') |
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return text.trim() |
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} |
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function truncateBlurb(s: string, max: number): string { |
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const normalized = s.trim().replace(/\s+/g, ' ') |
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if (normalized.length <= max) return normalized |
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return `${normalized.slice(0, max)}…` |
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} |
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/** |
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* One-line preview for {@link ParentNotePreview}: prefer `title` / `subject` / kind metadata, else first |
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* {@link PARENT_REPLY_BLURB_MAX} characters of markup-stripped `content`. |
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*/ |
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export function getParentReplyBlurbDisplayText( |
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event: Event, |
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maxLen: number = PARENT_REPLY_BLURB_MAX |
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): string { |
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const titleTag = event.tags.find(tagNameEquals('title'))?.[1]?.trim() |
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if (titleTag) return truncateBlurb(stripMarkupForPreview(titleTag), maxLen) |
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const subjectTag = event.tags.find(tagNameEquals('subject'))?.[1]?.trim() |
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if (subjectTag) return truncateBlurb(stripMarkupForPreview(subjectTag), maxLen) |
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if ( |
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event.kind === kinds.LongFormArticle || |
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event.kind === ExtendedKind.PUBLICATION || |
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event.kind === ExtendedKind.PUBLICATION_CONTENT |
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) { |
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const meta = getLongFormArticleMetadataFromEvent(event) |
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if (meta.title?.trim()) return truncateBlurb(stripMarkupForPreview(meta.title.trim()), maxLen) |
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if (meta.summary?.trim()) { |
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return truncateBlurb(stripMarkupForPreview(meta.summary), maxLen) |
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} |
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} |
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if (event.kind === kinds.LiveEvent || event.kind === 30312 || event.kind === 30313) { |
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const live = getLiveEventMetadataFromEvent(event) |
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const rawTitle = live.title?.trim() |
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if (rawTitle && rawTitle !== 'no title') return truncateBlurb(stripMarkupForPreview(rawTitle), maxLen) |
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if (live.summary?.trim()) return truncateBlurb(stripMarkupForPreview(live.summary), maxLen) |
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} |
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if (isMusicTrackKind(event.kind)) { |
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const track = getMusicTrackFromEvent(event) |
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if (track) return truncateBlurb(musicTrackDisplayLine(track), maxLen) |
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} |
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if (event.kind === ExtendedKind.PICTURE || isNip71StyleVideoKind(event.kind)) { |
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const cap = truncateBlurb(stripMarkupForPreview(event.content ?? ''), maxLen) |
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return cap |
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} |
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return truncateBlurb(stripMarkupForPreview(event.content ?? ''), maxLen) |
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} |
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export function parentReplyPollQuestionBlurb(content: string, maxLen = PARENT_REPLY_BLURB_MAX): string { |
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return truncateBlurb(stripMarkupForPreview(content ?? ''), maxLen) |
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}
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