initial commit

app/api/topics/[slug]/related/route.ts

@@ -0,0 +1,71 @@
+import { NextRequest, NextResponse } from 'next/server'
+import connectDB from '@/lib/mongodb'
+import TopicModel, { transformToTopics } from '@/models/topic'
+
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ slug: string }> }
+) {
+  try {
+    await connectDB()
+
+    const { slug } = await params
+    const searchParams = request.nextUrl.searchParams
+    const limit = parseInt(searchParams.get('limit') || '2')
+
+    if (!slug) {
+      return NextResponse.json(
+        {
+          success: false,
+          error: {
+            message: 'Topic slug is required',
+            code: 'SLUG_REQUIRED',
+          },
+        },
+        { status: 400 }
+      )
+    }
+
+    // First, get the current post to find its ID and tags
+    const currentPost = await TopicModel.findOne({ 
+      slug, 
+      isDraft: false 
+    }).lean()
+
+    if (!currentPost) {
+      return NextResponse.json({
+        success: true,
+        data: [],
+      })
+    }
+
+    // Find related posts by excluding the current post and sorting by publishedAt
+    const relatedPosts = await TopicModel.find({
+      id: { $ne: currentPost.id },
+      isDraft: false,
+    })
+      .sort({ publishedAt: -1 })
+      .limit(limit)
+      .lean()
+
+    // Transform to proper format
+    const transformedPosts = transformToTopics(relatedPosts)
+
+    return NextResponse.json({
+      success: true,
+      data: transformedPosts,
+    })
+  } catch (error) {
+    console.error('Error fetching related posts:', error)
+    return NextResponse.json(
+      {
+        success: false,
+        error: {
+          message: 'Failed to fetch related posts',
+          code: 'SERVER_ERROR',
+        },
+      },
+      { status: 500 }
+    )
+  }
+}