Add content mutation norm editor socket endpoint

app/controllers/socket/NormEditor.controller.js

@@ -93,6 +93,15 @@ class NormEditorGroup {
         }
     }
 
+    blast_content_mutation(mutation, exclude_conn_id) {
+        const conns = Object.values(this.connections)
+
+        for ( const conn of conns ) {
+            if ( conn.id === exclude_conn_id ) continue;
+            conn._request('applyRemoteContentMutation', { mutation })
+        }
+    }
+
     set_member_selection(conn, selection) {
         const session = this.session(conn)
         if ( session ) {
@@ -198,6 +207,20 @@ class NormEditorController extends SocketController {
             )
     }
 
+    broadcast_content_mutation(transaction, socket) {
+        const editor_group = this._get_editor_group_or_fail(transaction)
+        if ( !editor_group ) return;
+
+        if ( transaction.incoming.data.path.toLowerCase().startsWith('body@') ) {
+            return transaction.status(200).send()
+        }
+
+        console.log('mutation', transaction.incoming.data)
+        editor_group.blast_content_mutation(transaction.incoming.data, transaction.cm.id)
+
+        transaction.status(200).send()
+    }
+
     async join_editor_group(transaction, socket) {
         // FIXME support versioning
         const Page = this.models.get('api:Page')