chore: init monorepo snapshot

LightRAG/lightrag_webui/src/services/navigation.ts

@@ -0,0 +1,85 @@
+import { NavigateFunction } from 'react-router-dom';
+import { useAuthStore, useBackendState } from '@/stores/state';
+import { useGraphStore } from '@/stores/graph';
+import { useSettingsStore } from '@/stores/settings';
+
+class NavigationService {
+  private navigate: NavigateFunction | null = null;
+
+  setNavigate(navigate: NavigateFunction) {
+    this.navigate = navigate;
+  }
+
+  /**
+   * Reset all application state to ensure a clean environment.
+   * This function should be called when:
+   * 1. User logs out
+   * 2. Authentication token expires
+   * 3. Direct access to login page
+   *
+   * @param preserveHistory If true, chat history will be preserved. Default is false.
+   */
+  resetAllApplicationState(preserveHistory = false) {
+    console.log('Resetting all application state...');
+
+    // Reset graph state
+    const graphStore = useGraphStore.getState();
+    const sigma = graphStore.sigmaInstance;
+    graphStore.reset();
+    graphStore.setGraphDataFetchAttempted(false);
+    graphStore.setLabelsFetchAttempted(false);
+    graphStore.setSigmaInstance(null);
+    graphStore.setIsFetching(false); // Reset isFetching state to prevent data loading issues
+
+    // Reset backend state
+    useBackendState.getState().clear();
+
+    // Reset retrieval history message only if preserveHistory is false
+    if (!preserveHistory) {
+      useSettingsStore.getState().setRetrievalHistory([]);
+    }
+
+    // Clear authentication state
+    sessionStorage.clear();
+
+    if (sigma) {
+      sigma.getGraph().clear();
+      sigma.kill();
+      useGraphStore.getState().setSigmaInstance(null);
+    }
+  }
+
+  /**
+   * Navigate to login page and reset application state
+   */
+  navigateToLogin() {
+    if (!this.navigate) {
+      console.error('Navigation function not set');
+      return;
+    }
+
+    // Store current username before logout for comparison during next login
+    const currentUsername = useAuthStore.getState().username;
+    if (currentUsername) {
+      localStorage.setItem('LIGHTRAG-PREVIOUS-USER', currentUsername);
+    }
+
+    // Reset application state but preserve history
+    // History will be cleared on next login if the user changes
+    this.resetAllApplicationState(true);
+    useAuthStore.getState().logout();
+
+    this.navigate('/login');
+  }
+
+  navigateToHome() {
+    if (!this.navigate) {
+      console.error('Navigation function not set');
+      return;
+    }
+
+    this.navigate('/');
+  }
+}
+
+export const navigationService = new NavigationService();