1 files changed, 39 insertions, 0 deletions
diff --git a/src/client/util/SelectionManager.ts b/src/client/util/SelectionManager.ts
new file mode 100644
index 000000000..0759ae110
--- /dev/null
+++ b/src/client/util/SelectionManager.ts
@@ -0,0 +1,39 @@
+import { CollectionFreeFormDocumentView } from "../views/nodes/CollectionFreeFormDocumentView";
+import { observable, action } from "mobx";
+
+export namespace SelectionManager {
+    class Manager {
+        @observable
+        SelectedDocuments: Array<CollectionFreeFormDocumentView> = [];
+
+        @action
+        SelectDoc(doc: CollectionFreeFormDocumentView, ctrlPressed: boolean): void {
+            // if doc is not in SelectedDocuments, add it
+            if (!ctrlPressed) {
+                manager.SelectedDocuments = [];
+            }
+
+            if (manager.SelectedDocuments.indexOf(doc) === -1) {
+                manager.SelectedDocuments.push(doc)
+            }
+        }
+    }
+
+    const manager = new Manager;
+
+    export function SelectDoc(doc: CollectionFreeFormDocumentView, ctrlPressed: boolean): void {
+        manager.SelectDoc(doc, ctrlPressed)
+    }
+
+    export function IsSelected(doc: CollectionFreeFormDocumentView): boolean {
+        return manager.SelectedDocuments.indexOf(doc) !== -1;
+    }
+
+    export function DeselectAll(): void {
+        manager.SelectedDocuments = []
+    }
+
+    export function SelectedDocuments(): Array<CollectionFreeFormDocumentView> {
+        return manager.SelectedDocuments;
+    }
+}
+\ No newline at end of file