Implement post comment mutation

src/core/server/graph/tenant/resolvers/mutation.ts

@@ -1,10 +1,16 @@
 import { GQLMutationTypeResolver } from "talk-server/graph/tenant/schema/__generated__/types";
 
 const Mutation: GQLMutationTypeResolver<void> = {
-  createComment: async (source, { input }, ctx) => ({
-    comment: await ctx.mutators.Comment.create(input),
-    clientMutationId: input.clientMutationId,
-  }),
+  createComment: async (source, { input }, ctx) => {
+    const comment = await ctx.mutators.Comment.create(input);
+    return {
+      commentEdge: {
+        cursor: comment.created_at,
+        node: comment,
+      },
+      clientMutationId: input.clientMutationId,
+    };
+  },
   updateSettings: async (source, { input }, ctx) => ({
     settings: await ctx.mutators.Settings.update(input.settings),
     clientMutationId: input.clientMutationId,

src/core/server/graph/tenant/schema/schema.graphql

@@ -821,9 +821,9 @@ mutation.
 """
 type CreateCommentPayload {
   """
-  comment is the possibly created comment.
+  CommentEdge is the possibly created comment edge.
   """
-  comment: Comment
+  commentEdge: CommentEdge
 
   """
   clientMutationId is required for Relay support.