Implemented Reference properties

app/imports/api/library/methods/updateReferenceNode.js

@@ -0,0 +1,67 @@
+import { ValidatedMethod } from 'meteor/mdg:validated-method';
+import SimpleSchema from 'simpl-schema';
+import { RateLimiterMixin } from 'ddp-rate-limiter-mixin';
+import LibraryNodes from '/imports/api/library/LibraryNodes.js';
+import {
+  assertDocEditPermission,
+  assertViewPermission,
+} from '/imports/api/sharing/sharingPermissions.js';
+import fetchDocByRef from '/imports/api/parenting/fetchDocByRef.js';
+
+const updateReferenceNode = new ValidatedMethod({
+  name: 'libraryNodes.updateReferenceNode',
+  validate: new SimpleSchema({
+    _id: {
+      type: String,
+      regEx: SimpleSchema.RegEx.Id,
+    }
+  }).validator(),
+  mixins: [RateLimiterMixin],
+  rateLimit: {
+    numRequests: 5,
+    timeInterval: 5000,
+  },
+  run({_id}) {
+    let userId = this.userId;
+    let node = LibraryNodes.findOne(_id);
+    assertDocEditPermission(node, userId);
+    updateReferenceNodeWork(node, userId);
+  },
+});
+
+function writeCache(_id, cache){
+  LibraryNodes.update(_id, {$set: {cache}}, {
+    selector: {type: 'reference'},
+  });
+}
+
+function updateReferenceNodeWork(node, userId){
+  let cache = {}
+  if (!node.ref){
+    writeCache(node._id, cache);
+    return;
+  }
+  let doc, library;
+  try {
+    doc = fetchDocByRef(node.ref);
+    if (doc.removed) throw 'Property has been deleted';
+    if (doc.ancestors[0].id !== node.ancestors[0].id){
+      library = fetchDocByRef(doc.ancestors[0]);
+      assertViewPermission(library, userId)
+    }
+  } catch(e){
+    cache = {error: e.reason || e.message || e.toString()}
+    writeCache(node._id, cache);
+    return;
+  }
+  cache = {
+    node: {name: doc.name, type: doc.type},
+  };
+  if (library){
+    cache.library = {name: library.name};
+  }
+  writeCache(node._id, cache);
+}
+
+export default updateReferenceNode;
+export { updateReferenceNodeWork }