戒酒的李白
75 lines
3.4 KiB
JavaScript
75 lines
3.4 KiB
JavaScript
'use strict'; function lcsRatio(str1, str2) { str1 = str1.toLowerCase(); str2 = str2.toLowerCase(); if (!str1 || !str2) return 0; const m = str1.length; const n = str2.length; const dp = Array(m + 1).fill().map(() => Array(n + 1).fill(0)); for (let i = 1; i <= m; i++)for (let j = 1; j <= n; j++)if (str1[i - 1] === str2[j - 1]) dp[i][j] = dp[i - 1][j - 1] + 1; else dp[i][j] = Math.max(dp[i - 1][j], dp[i][j - 1]); return dp[m][n] / m * 100 }
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function multiWordLcsRatio(queryWords, text) {
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text = text.toLowerCase(); const totalQueryLength = queryWords.reduce((sum, word) => sum + word.length, 0); const usedChars = (new Array(text.length)).fill(false); let totalMatched = 0; for (const word of queryWords) {
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const wordLower = word.toLowerCase(); let foundMatch = false; let startPos = 0; while (true) {
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const pos = text.indexOf(wordLower, startPos); if (pos === -1) break; const endPos = pos + wordLower.length; let canUse = true; for (let i = pos; i < endPos; i++)if (usedChars[i]) { canUse = false; break } if (canUse) {
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for (let i =
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pos; i < endPos; i++)usedChars[i] = true; totalMatched += wordLower.length; foundMatch = true; break
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} startPos = pos + 1
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}
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} return totalMatched / totalQueryLength * 100
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}
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self.onmessage = function (e) {
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const { db, queryWords, minRatio } = e.data;
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try {
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const results = db.map(item => {
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const matchRatio = multiWordLcsRatio(queryWords, item.x);
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return {
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matchRatio,
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item,
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exactMatch: queryWords.every(word => item.x.toLowerCase().includes(word))
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};
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}).filter(result => result.matchRatio >= minRatio);
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results.sort((a, b) => {
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if (b.matchRatio !== a.matchRatio) return b.matchRatio - a.matchRatio;
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return b.exactMatch - a.exactMatch
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});
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const apiResults = results.map(result => ({
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filename: result.item.f,
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timestamp: result.item.t,
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similarity: result.item.s,
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text: result.item.x,
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match_ratio: result.matchRatio,
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exact_match: result.exactMatch
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}));
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if (apiResults.length === 0) {
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self.postMessage({
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status: "success",
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data: [{ // 包装在数组中
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status: "success",
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data: [],
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count: 0,
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folder: "subtitle",
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max_results: "unlimited",
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message: `未找到与 '${queryWords.join(" ")}' 匹配的结果`,
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suggestions: [
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"检查输入是否正确",
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`尝试降低最小匹配率（当前：${minRatio}%）`,
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"尝试降低最小相似度",
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"尝试使用更简短的关键词"
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]
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}],
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count: 1 // 数组长度为1
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});
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return;
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}
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self.postMessage({
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status: "success",
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data: apiResults,
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count: apiResults.length
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});
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} catch (error) {
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self.postMessage({
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status: "error",
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message: error.message || "搜索处理时发生错误",
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data: [],
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count: 0,
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suggestions: ["请重试"]
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});
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}
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}; |