Edit collection (#173)

* Collection edit modal

* Add icon

* 💚

* Oh look, some specs

* Delete collection

* Remove from collection

* Handle error responses
Protect against deleting last collection

* Fix key

* 💚

* Keyboard navigate documents list

* Add missing database constraints

frontend/stores/DocumentsStore.js

@@ -16,11 +16,13 @@ import stores from 'stores';
 import Document from 'models/Document';
 import ErrorsStore from 'stores/ErrorsStore';
 import CacheStore from 'stores/CacheStore';
+import UiStore from 'stores/UiStore';
 
 const DOCUMENTS_CACHE_KEY = 'DOCUMENTS_CACHE_KEY';
 
 type Options = {
   cache: CacheStore,
+  ui: UiStore,
 };
 
 class DocumentsStore extends BaseStore {
@@ -31,6 +33,7 @@ class DocumentsStore extends BaseStore {
 
   errors: ErrorsStore;
   cache: CacheStore;
+  ui: UiStore;
 
   /* Computed */
 
@@ -49,6 +52,12 @@ class DocumentsStore extends BaseStore {
     return _.filter(this.data.values(), 'starred');
   }
 
+  @computed get active(): ?Document {
+    return this.ui.activeDocumentId
+      ? this.getById(this.ui.activeDocumentId)
+      : undefined;
+  }
+
   /* Actions */
 
   @action fetchAll = async (request: string = 'list'): Promise<*> => {
@@ -127,6 +136,7 @@ class DocumentsStore extends BaseStore {
 
     this.errors = stores.errors;
     this.cache = options.cache;
+    this.ui = options.ui;
 
     this.cache.getItem(DOCUMENTS_CACHE_KEY).then(data => {
       if (data) {