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frontend/src/utils/lrcParser.ts

@@ -0,0 +1,48 @@
+export interface LrcLine {
+  time: number
+  text: string
+}
+
+export interface LrcData {
+  title?: string
+  artist?: string
+  lines: LrcLine[]
+}
+
+export function parseLrc(content: string): LrcData {
+  const result: LrcData = { lines: [] }
+  const lines = content.split('\n')
+
+  for (const line of lines) {
+    const trimmed = line.trim()
+    if (!trimmed) continue
+
+    // 元信息
+    const metaTitle = trimmed.match(/^\[ti:(.*?)\]$/i)
+    if (metaTitle) { result.title = metaTitle[1].trim(); continue }
+    const metaArtist = trimmed.match(/^\[ar:(.*?)\]$/i)
+    if (metaArtist) { result.artist = metaArtist[1].trim(); continue }
+
+    // 时间标签
+    const timeTags: number[] = []
+    let text = trimmed
+    const tagRegex = /\[(\d{2}):(\d{2})([.:])(\d{2,3})\]/g
+    let m
+    while ((m = tagRegex.exec(trimmed)) !== null) {
+      const min = parseInt(m[1])
+      const sec = parseInt(m[2])
+      const ms = parseInt(m[4].padEnd(3, '0'))
+      timeTags.push(min * 60 + sec + ms / 1000)
+    }
+
+    if (timeTags.length === 0) continue
+
+    text = trimmed.replace(/\[\d{2}:\d{2}[.:]\d{2,3}\]/g, '').trim()
+    for (const t of timeTags) {
+      result.lines.push({ time: t, text })
+    }
+  }
+
+  result.lines.sort((a, b) => a.time - b.time)
+  return result
+}