feat: Added ability to disable sharing at collection (#1875)

* feat: Added ability to disable sharing at collection

* fix: Disable all previous share links when disabling collection share
Language

* fix: Disable document sharing for read-only collection members

* wip

* test

* fix: Clear policies after updating sharing settings

* chore: Less ambiguous language

* feat: Allow setting sharing choice on collection creation

app/stores/CollectionsStore.js

@@ -1,6 +1,6 @@
 // @flow
 import { concat, filter, last } from "lodash";
-import { computed } from "mobx";
+import { computed, action } from "mobx";
 
 import naturalSort from "shared/utils/naturalSort";
 import Collection from "models/Collection";
@@ -88,6 +88,25 @@ export default class CollectionsStore extends BaseStore<Collection> {
     });
   }
 
+  @action
+  async update(params: Object): Promise<Collection> {
+    const result = await super.update(params);
+
+    // If we're changing sharing permissions on the collection then we need to
+    // remove all locally cached policies for documents in the collection as they
+    // are now invalid
+    if (params.sharing !== undefined) {
+      const collection = this.get(params.id);
+      if (collection) {
+        collection.documentIds.forEach((id) => {
+          this.rootStore.policies.remove(id);
+        });
+      }
+    }
+
+    return result;
+  }
+
   getPathForDocument(documentId: string): ?DocumentPath {
     return this.pathsToDocuments.find((path) => path.id === documentId);
   }