feat: save conflict check polling

server/controllers/common.js

@@ -147,7 +147,8 @@ router.get(['/e', '/e/*'], async (req, res, next) => {
       mode: 'create',
       content: null,
       title: null,
-      description: null
+      description: null,
+      updatedAt: new Date().toISOString()
     }
 
     // -> From Template

server/graph/resolvers/page.js

@@ -252,6 +252,24 @@ module.exports = {
         }
         return result
       }, [])
+    },
+    /**
+     * CHECK FOR EDITING CONFLICT
+     */
+    async checkConflicts (obj, args, context, info) {
+      let page = await WIKI.models.pages.query().select('path', 'localeCode', 'updatedAt').findById(args.id)
+      if (page) {
+        if (WIKI.auth.checkAccess(context.req.user, ['write:pages', 'manage:pages'], {
+          path: page.path,
+          locale: page.localeCode
+        })) {
+          return page.updatedAt !== args.checkoutDate
+        } else {
+          throw new WIKI.Error.PageUpdateForbidden()
+        }
+      } else {
+        throw new WIKI.Error.PageNotFound()
+      }
     }
   },
   PageMutation: {

server/graph/schemas/page.graphql

@@ -61,6 +61,11 @@ type PageQuery {
   links(
     locale: String!
   ): [PageLinkItem] @auth(requires: ["manage:system", "read:pages"])
+
+  checkConflicts(
+    id: Int!
+    checkoutDate: Date!
+  ): Boolean! @auth(requires: ["write:pages", "manage:pages", "manage:system"])
 }
 
 # -----------------------------------------------

server/views/editor.pug

@@ -17,4 +17,5 @@ block body
       init-mode=page.mode
       init-editor=page.editorKey
       init-content=page.content
+      checkout-date=page.updatedAt
       )