102 lines
2.8 KiB
TypeScript
102 lines
2.8 KiB
TypeScript
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export type EmojiDef = {
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emoji: string;
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name: string;
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url: string;
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aliasOf?: string;
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} | {
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emoji: string;
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name: string;
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aliasOf?: string;
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isCustomEmoji?: true;
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};
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type EmojiScore = { emoji: EmojiDef, score: number };
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export function searchEmoji(query: string | null, emojiDb: EmojiDef[], max = 30): EmojiDef[] {
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if (!query) {
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return [];
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}
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const matched = new Map<string, EmojiScore>();
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// 完全一致（エイリアスなし）
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emojiDb.some(x => {
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if (x.name === query && !x.aliasOf) {
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matched.set(x.name, { emoji: x, score: query.length + 3 });
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}
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return matched.size === max;
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});
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// 完全一致（エイリアス込み）
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if (matched.size < max) {
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emojiDb.some(x => {
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if (x.name === query && !matched.has(x.aliasOf ?? x.name)) {
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matched.set(x.aliasOf ?? x.name, { emoji: x, score: query.length + 2 });
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}
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return matched.size === max;
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});
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}
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// 前方一致（エイリアスなし）
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if (matched.size < max) {
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emojiDb.some(x => {
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if (x.name.startsWith(query) && !x.aliasOf && !matched.has(x.name)) {
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matched.set(x.name, { emoji: x, score: query.length + 1 });
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}
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return matched.size === max;
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});
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}
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// 前方一致（エイリアス込み）
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if (matched.size < max) {
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emojiDb.some(x => {
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if (x.name.startsWith(query) && !matched.has(x.aliasOf ?? x.name)) {
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matched.set(x.aliasOf ?? x.name, { emoji: x, score: query.length });
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}
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return matched.size === max;
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});
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}
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// 部分一致（エイリアス込み）
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if (matched.size < max) {
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emojiDb.some(x => {
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if (x.name.includes(query) && !matched.has(x.aliasOf ?? x.name)) {
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matched.set(x.aliasOf ?? x.name, { emoji: x, score: query.length - 1 });
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}
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return matched.size === max;
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});
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}
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// 簡易あいまい検索（3文字以上）
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if (matched.size < max && query.length > 3) {
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const queryChars = [...query];
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const hitEmojis = new Map<string, EmojiScore>();
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for (const x of emojiDb) {
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// 文字列の位置を進めながら、クエリの文字を順番に探す
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let pos = 0;
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let hit = 0;
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for (const c of queryChars) {
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pos = x.name.indexOf(c, pos);
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if (pos <= -1) break;
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hit++;
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}
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// 半分以上の文字が含まれていればヒットとする
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if (hit > Math.ceil(queryChars.length / 2) && hit - 2 > (matched.get(x.aliasOf ?? x.name)?.score ?? 0)) {
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hitEmojis.set(x.aliasOf ?? x.name, { emoji: x, score: hit - 2 });
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}
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}
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// ヒットしたものを全部追加すると雑多になるので、先頭の6件程度だけにしておく（6件＝オートコンプリートのポップアップのサイズ分）
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[...hitEmojis.values()]
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.sort((x, y) => y.score - x.score)
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.slice(0, 6)
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.forEach(it => matched.set(it.emoji.name, it));
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}
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return [...matched.values()]
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.sort((x, y) => y.score - x.score)
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.slice(0, max)
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.map(it => it.emoji);
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}
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