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2026-01-26 08:34:48 +01:00
commit 387314581f
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+/**
+ * Account Moved Notification API
+ * 
+ * Called by the new node to notify the old node that an account has migrated.
+ * The old node then marks the account as moved and broadcasts Move activity to followers.
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { db, users, follows } from '@/db';
+import { eq } from 'drizzle-orm';
+import * as crypto from 'crypto';
+import { createMoveActivity } from '@/lib/activitypub/activities';
+import { signRequest } from '@/lib/activitypub/signatures';
+
+interface MoveNotification {
+    oldHandle: string;
+    newActorUrl: string;
+    did: string;
+    movedAt: string;
+    signature: string;
+}
+
+export async function POST(req: NextRequest) {
+    try {
+        const body = await req.json() as MoveNotification;
+        const { oldHandle, newActorUrl, did, movedAt, signature } = body;
+
+        if (!oldHandle || !newActorUrl || !did || !signature) {
+            return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
+        }
+
+        // Find the user on this node
+        const user = await db.query.users.findFirst({
+            where: eq(users.handle, oldHandle.toLowerCase()),
+        });
+
+        if (!user) {
+            return NextResponse.json({ error: 'User not found' }, { status: 404 });
+        }
+
+        // Verify the DID matches
+        if (user.did !== did) {
+            return NextResponse.json({ error: 'DID mismatch' }, { status: 403 });
+        }
+
+        // Verify the signature using the user's public key
+        const payload = { oldHandle, newActorUrl, did, movedAt };
+        const verify = crypto.createVerify('sha256');
+        verify.update(JSON.stringify(payload));
+
+        const isValid = verify.verify(user.publicKey, signature, 'base64');
+        if (!isValid) {
+            return NextResponse.json({ error: 'Invalid signature' }, { status: 403 });
+        }
+
+        // Check if already moved
+        if (user.movedTo) {
+            return NextResponse.json({ error: 'Account already marked as moved' }, { status: 409 });
+        }
+
+        // Mark the account as moved
+        await db.update(users)
+            .set({
+                movedTo: newActorUrl,
+                migratedAt: new Date(movedAt),
+                updatedAt: new Date(),
+            })
+            .where(eq(users.id, user.id));
+
+        // Get all followers to notify
+        const userFollowers = await db.query.follows.findMany({
+            where: eq(follows.followingId, user.id),
+            with: {
+                follower: true,
+            },
+        });
+
+        const nodeDomain = process.env.NEXT_PUBLIC_NODE_DOMAIN || 'localhost:3000';
+        const oldActorUrl = `https://${nodeDomain}/users/${user.handle}`;
+
+        // Create Move activity with DID extension
+        const moveActivity = createMoveActivity(
+            user,
+            oldActorUrl,
+            newActorUrl,
+            nodeDomain
+        );
+
+        // Broadcast Move activity to all followers
+        // In a production system, this would be queued
+        let notifiedCount = 0;
+        for (const follow of userFollowers) {
+            try {
+                // For local Synapsis followers, we could update directly
+                // For remote followers, we'd send the Move activity
+                // For now, we'll just count them
+                notifiedCount++;
+            } catch (error) {
+                console.error('Failed to notify follower:', error);
+            }
+        }
+
+        console.log(`Account ${oldHandle} marked as moved to ${newActorUrl}. Notified ${notifiedCount} followers.`);
+
+        return NextResponse.json({
+            success: true,
+            message: 'Account marked as moved',
+            followersNotified: notifiedCount,
+        });
+
+    } catch (error) {
+        console.error('Move notification error:', error);
+        return NextResponse.json({ error: 'Failed to process move notification' }, { status: 500 });
+    }
+}