Restructure

src-angular/app/core/tab-persist.strategy.ts

@@ -0,0 +1,29 @@
+import { Injectable } from '@angular/core'
+import { ActivatedRouteSnapshot, DetachedRouteHandle, RouteReuseStrategy } from '@angular/router'
+
+/**
+ * This makes each route with the 'reuse' data flag persist when not in focus.
+ */
+@Injectable()
+export class TabPersistStrategy extends RouteReuseStrategy {
+	private handles: { [path: string]: DetachedRouteHandle } = {}
+
+	shouldDetach(route: ActivatedRouteSnapshot) {
+		return route.data.shouldReuse || false
+	}
+	store(route: ActivatedRouteSnapshot, handle: DetachedRouteHandle) {
+		if (route.data.shouldReuse) {
+			this.handles[route.routeConfig.path] = handle
+		}
+	}
+	shouldAttach(route: ActivatedRouteSnapshot) {
+		return !!route.routeConfig && !!this.handles[route.routeConfig.path]
+	}
+	retrieve(route: ActivatedRouteSnapshot) {
+		if (!route.routeConfig) return null
+		return this.handles[route.routeConfig.path]
+	}
+	shouldReuseRoute(future: ActivatedRouteSnapshot) {
+		return future.data.shouldReuse || false
+	}
+}