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import type { TEmoji } from '@/types' |
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/** Canonical reaction `content` for discussion upvotes (kind 7). */ |
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const DISCUSSION_UPVOTE = '+' |
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/** Canonical reaction `content` for discussion downvotes (kind 7). */ |
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const DISCUSSION_DOWNVOTE = '-' |
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/** Shown in discussion UIs; legacy reaction `content` used the same characters. */ |
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export const DISCUSSION_UPVOTE_DISPLAY = '⬆️' |
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export const DISCUSSION_DOWNVOTE_DISPLAY = '⬇️' |
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function emojiString(emoji: TEmoji | string | undefined | null): string | undefined { |
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if (emoji === undefined || emoji === null) return undefined |
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return typeof emoji === 'string' ? emoji : emoji.shortcode |
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} |
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/** |
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* Relays/clients may use ⬆ (U+2B06) vs ⬆️ (U+2B06 U+FE0F); normalize before comparing. |
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*/ |
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function normalizedVoteToken(s: string): string { |
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return s.normalize('NFC').replace(/\ufe0f/g, '').trim() |
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} |
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const UP_ARROW = '\u2b06' |
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const DOWN_ARROW = '\u2b07' |
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export function isDiscussionUpvoteEmoji(emoji: TEmoji | string | undefined | null): boolean { |
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const s = emojiString(emoji) |
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if (s === undefined) return false |
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const n = normalizedVoteToken(s) |
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return n === DISCUSSION_UPVOTE || n === UP_ARROW |
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} |
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export function isDiscussionDownvoteEmoji(emoji: TEmoji | string | undefined | null): boolean { |
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const s = emojiString(emoji) |
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if (s === undefined) return false |
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const n = normalizedVoteToken(s) |
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return n === DISCUSSION_DOWNVOTE || n === DOWN_ARROW |
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} |
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export function isDiscussionVoteEmoji(emoji: TEmoji | string | undefined | null): boolean { |
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return isDiscussionUpvoteEmoji(emoji) || isDiscussionDownvoteEmoji(emoji) |
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} |
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export const DISCUSSION_VOTE_EMOJIS = [DISCUSSION_UPVOTE, DISCUSSION_DOWNVOTE] as const |
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/** Same vote direction, including legacy ⬆️/⬇️ vs +/-. */ |
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export function discussionVoteMatches( |
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stored: TEmoji | string | undefined | null, |
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clicked: string | TEmoji |
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): boolean { |
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if (stored === undefined || stored === null) return false |
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const clickStr = typeof clicked === 'string' ? clicked : clicked.shortcode |
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const storeStr = typeof stored === 'string' ? stored : stored.shortcode |
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if (storeStr === clickStr) return true |
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return ( |
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(isDiscussionUpvoteEmoji(storeStr) && isDiscussionUpvoteEmoji(clickStr)) || |
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(isDiscussionDownvoteEmoji(storeStr) && isDiscussionDownvoteEmoji(clickStr)) |
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) |
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}
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