feat: delete all users posts when user is deleted

convex/posts.ts

@@ -0,0 +1,33 @@
+import { v } from 'convex/values';
+import { mutation } from './_generated/server';
+import { userQuery } from './users';
+
+export const createPost = mutation({
+  args: {
+    clerkUserId: v.string(),
+    content: v.array(v.string()),
+    parentPostId: v.optional(v.id('posts')),
+  },
+  handler: async (ctx, args) => {
+    const userIdentity = await ctx.auth.getUserIdentity();
+    const user = await userQuery(ctx, args.clerkUserId);
+
+    if (userIdentity === null) {
+      return 'USER_NOT_AUTHORIZED';
+    }
+
+    if (user === null) {
+      return 'USER_NOT_FOUND';
+    }
+
+    if (userIdentity.subject !== args.clerkUserId) {
+      return 'CANNOT_POST_ON_BEHALF_OF_ANOTHER_USER';
+    }
+
+    return await ctx.db.insert('posts', {
+      userId: user._id,
+      content: args.content,
+      parentPostId: args.parentPostId,
+    });
+  },
+});