Initial English PK app

app/api/words/[id]/generate-audio/route.ts

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+import { existsSync, mkdirSync } from "node:fs";
+import { writeFile } from "node:fs/promises";
+import path from "node:path";
+import { NextRequest, NextResponse } from "next/server";
+import { EdgeTTS } from "edge-tts-universal";
+import { findWord, getSettings, updateWordAudio } from "@/lib/db";
+
+export const runtime = "nodejs";
+export const dynamic = "force-dynamic";
+
+type RouteContext = {
+  params: Promise<{ id: string }>;
+};
+
+export async function POST(_request: NextRequest, context: RouteContext) {
+  try {
+    const { id } = await context.params;
+    const wordId = Number(id);
+    const word = findWord(wordId);
+
+    if (!word) {
+      return NextResponse.json({ message: "词库不存在" }, { status: 404 });
+    }
+
+    const audioDirectory = path.join(process.cwd(), "public", "audio");
+    if (!existsSync(audioDirectory)) {
+      mkdirSync(audioDirectory, { recursive: true });
+    }
+
+    const safeEnglish = word.english.toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/(^-|-$)/g, "");
+    const fileName = `${word.id}-${safeEnglish || "word"}.mp3`;
+    const filePath = path.join(audioDirectory, fileName);
+    const publicPath = `/audio/${fileName}`;
+
+    const settings = getSettings();
+    const tts = new EdgeTTS(word.english, settings.ttsVoice, {
+      rate: settings.ttsRate,
+    });
+    const result = await tts.synthesize();
+    const audioBuffer = Buffer.from(await result.audio.arrayBuffer());
+    await writeFile(filePath, audioBuffer);
+
+    const updatedWord = updateWordAudio(word.id, publicPath);
+    return NextResponse.json({ word: updatedWord });
+  } catch (error) {
+    const message = error instanceof Error ? error.message : "生成语音失败";
+    return NextResponse.json({ message }, { status: 500 });
+  }
+}