Initial commit

Generated by create-expo-app 3.3.0.
2025-04-03 08:58:19 +02:00
commit 6ed3300183
113 changed files with 22036 additions and 0 deletions
@@ -0,0 +1,176 @@
+import React, { createContext, useContext, useEffect, useState } from "react";
+import * as AuthSession from "expo-auth-session";
+import * as WebBrowser from "expo-web-browser";
+import { Platform } from "react-native";
+import { Storage } from "./storage";
+import { keycloakConfig } from "./keycloakConfig";
+import { ActivityIndicator } from "react-native";
+
+// Only call maybeCompleteAuthSession on web platform
+if (Platform.OS === "web") {
+  WebBrowser.maybeCompleteAuthSession();
+}
+
+const TOKEN_KEY = "kc_access_token";
+const REFRESH_KEY = "kc_refresh_token";
+const ID_TOKEN_KEY = "kc_id_token";
+
+const AuthContext = createContext<any>(null);
+
+export const AuthProvider = ({ children }: { children: React.ReactNode }) => {
+  const [discovery, setDiscovery] =
+    useState<AuthSession.DiscoveryDocument | null>(null);
+  const [accessToken, setAccessToken] = useState<string | null>(null);
+  const [idToken, setIdToken] = useState<string | null>(null);
+  const [refreshToken, setRefreshToken] = useState<string | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [isLoaded, setIsLoaded] = useState(false);
+
+  const redirectUri = AuthSession.makeRedirectUri({
+    scheme: keycloakConfig.scheme,
+    path: Platform.OS === "web" ? "" : "(auth)/index",
+  });
+
+  useEffect(() => {
+    const loadDiscovery = async () => {
+      const doc = await AuthSession.fetchDiscoveryAsync(
+        `${keycloakConfig.url}/realms/${keycloakConfig.realm}`
+      );
+      setDiscovery(doc);
+    };
+    loadDiscovery();
+  }, []);
+
+  useEffect(() => {
+    const restore = async () => {
+      const storedAccess = await Storage.getItem(TOKEN_KEY);
+      const storedId = await Storage.getItem(ID_TOKEN_KEY);
+      const storedRefresh = await Storage.getItem(REFRESH_KEY);
+
+      if (storedAccess && storedRefresh) {
+        setAccessToken(storedAccess);
+        setIdToken(storedId);
+        setRefreshToken(storedRefresh);
+      }
+
+      setLoading(false);
+      setIsLoaded(true);
+    };
+
+    restore();
+  }, []);
+
+  const login = async () => {
+    if (!discovery) return;
+
+    const authRequest = new AuthSession.AuthRequest({
+      responseType: AuthSession.ResponseType.Code,
+      clientId: keycloakConfig.clientId,
+      redirectUri,
+      scopes: ["openid", "profile", "email", "offline_access"],
+      usePKCE: true,
+      prompt: AuthSession.Prompt.Login,
+    });
+
+    await authRequest.makeAuthUrlAsync(discovery);
+
+    const result = await authRequest.promptAsync(discovery);
+
+    if (result.type === "success") {
+      const tokenResponse = await AuthSession.exchangeCodeAsync(
+        {
+          clientId: keycloakConfig.clientId,
+          code: result.params.code,
+          redirectUri,
+          extraParams: {
+            code_verifier: authRequest.codeVerifier || "",
+          },
+        },
+        discovery
+      );
+
+      const { accessToken, idToken, refreshToken } = tokenResponse;
+
+      setAccessToken(accessToken);
+      setIdToken(idToken ?? null);
+      setRefreshToken(refreshToken ?? null);
+
+      await Storage.setItem(TOKEN_KEY, accessToken || "");
+      if (idToken) await Storage.setItem(ID_TOKEN_KEY, idToken);
+      if (refreshToken) await Storage.setItem(REFRESH_KEY, refreshToken);
+    }
+  };
+
+  const refresh = async () => {
+    if (!discovery || !refreshToken) return;
+
+    const newToken = await AuthSession.refreshAsync(
+      {
+        clientId: keycloakConfig.clientId,
+        refreshToken,
+      },
+      discovery
+    );
+
+    setAccessToken(newToken.accessToken || null);
+    setIdToken(newToken.idToken || null);
+    setRefreshToken(newToken.refreshToken || null);
+
+    await Storage.setItem(TOKEN_KEY, newToken.accessToken || "");
+    if (newToken.idToken) await Storage.setItem(ID_TOKEN_KEY, newToken.idToken);
+    if (newToken.refreshToken)
+      await Storage.setItem(REFRESH_KEY, newToken.refreshToken);
+  };
+
+  const logout = async () => {
+    if (!discovery || !accessToken) return;
+
+    const clientId = keycloakConfig.clientId;
+    const logOutRedirectUri = AuthSession.makeRedirectUri({
+      scheme: keycloakConfig.scheme,
+      path: Platform.OS === "web" ? "" : "home",
+    });
+    const logoutUrl = `${
+      discovery.endSessionEndpoint
+    }?client_id=${clientId}&post_logout_redirect_uri=${encodeURIComponent(
+      logOutRedirectUri
+    )}&id_token_hint=${idToken}`;
+
+    const result = await WebBrowser.openAuthSessionAsync(
+      logoutUrl,
+      logOutRedirectUri
+    );
+
+    if (result.type === "success") {
+      setAccessToken(null);
+      setIdToken(null);
+      setRefreshToken(null);
+
+      await Storage.deleteItem(TOKEN_KEY);
+      await Storage.deleteItem(ID_TOKEN_KEY);
+      await Storage.deleteItem(REFRESH_KEY);
+    }
+  };
+
+  if (!discovery || loading) return <ActivityIndicator />;
+
+  return (
+    <AuthContext.Provider
+      value={{
+        accessToken,
+        idToken,
+        isLoaded,
+        refreshToken,
+        login,
+        logout,
+        refresh,
+        isAuthenticated: !!accessToken,
+        loading,
+      }}
+    >
+      {children}
+    </AuthContext.Provider>
+  );
+};
+
+export const useAuth = () => useContext(AuthContext);