Initial reader-api backend extracted from reader

app/api/chapters/[chapterId]/route.ts

@@ -0,0 +1,50 @@
+import { NextResponse } from "next/server"
+import connectToMongoDB from "@/lib/mongoose"
+import { Chapter } from "@/lib/models/chapter"
+
+export async function GET(
+  _req: Request,
+  { params }: { params: Promise<{ chapterId: string }> }
+) {
+  try {
+    const { chapterId } = await params
+
+    await connectToMongoDB()
+
+    const chapter = await Chapter.findById(chapterId).lean()
+
+    if (!chapter) {
+      return NextResponse.json({ error: "Chapter not found" }, { status: 404 })
+    }
+
+    // Fetch prev/next chapter numbers for navigation
+    const [prevChapter, nextChapter] = await Promise.all([
+      Chapter.findOne({ novelId: (chapter as any).novelId, number: (chapter as any).number - 1 })
+        .select("_id number")
+        .lean(),
+      Chapter.findOne({ novelId: (chapter as any).novelId, number: (chapter as any).number + 1 })
+        .select("_id number")
+        .lean(),
+    ])
+
+    return NextResponse.json({
+      id: (chapter as any)._id.toString(),
+      novelId: (chapter as any).novelId,
+      number: (chapter as any).number,
+      title: (chapter as any).title,
+      content: (chapter as any).content,
+      views: (chapter as any).views,
+      volumeNumber: (chapter as any).volumeNumber ?? null,
+      volumeTitle: (chapter as any).volumeTitle ?? null,
+      volumeChapterNumber: (chapter as any).volumeChapterNumber ?? null,
+      createdAt: ((chapter as any).createdAt as Date).toISOString(),
+      prevChapterId: prevChapter ? (prevChapter as any)._id.toString() : null,
+      prevChapterNumber: prevChapter ? (prevChapter as any).number : null,
+      nextChapterId: nextChapter ? (nextChapter as any)._id.toString() : null,
+      nextChapterNumber: nextChapter ? (nextChapter as any).number : null,
+    })
+  } catch (error) {
+    console.error("Chapter content error:", error)
+    return NextResponse.json({ error: "Internal Server Error" }, { status: 500 })
+  }
+}