1 files changed, 184 insertions, 11 deletions
diff --git a/packages/demobank-ui/src/hooks/backend.ts b/packages/demobank-ui/src/hooks/backend.ts
index 13a158f4f..f4f5ecfd0 100644
--- a/packages/demobank-ui/src/hooks/backend.ts
+++ b/packages/demobank-ui/src/hooks/backend.ts
@@ -14,7 +14,17 @@
  GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
  */
 
+import { canonicalizeBaseUrl } from "@gnu-taler/taler-util";
 import { useLocalStorage } from "@gnu-taler/web-util/lib/index.browser";
+import {
+  HttpResponse,
+  HttpResponseOk,
+  RequestOptions,
+} from "@gnu-taler/web-util/lib/index.browser";
+import { useApiContext } from "@gnu-taler/web-util/lib/index.browser";
+import { useCallback, useEffect, useState } from "preact/hooks";
+import { useSWRConfig } from "swr";
+import { useBackendContext } from "../context/backend.js";
 
 /**
  * Has the information to reach and
@@ -22,25 +32,38 @@ import { useLocalStorage } from "@gnu-taler/web-util/lib/index.browser";
  */
 export type BackendState = LoggedIn | LoggedOut;
 
-export interface BackendInfo {
-  url: string;
+export interface BackendCredentials {
   username: string;
   password: string;
 }
 
-interface LoggedIn extends BackendInfo {
+interface LoggedIn extends BackendCredentials {
+  url: string;
   status: "loggedIn";
+  isUserAdministrator: boolean;
 }
 interface LoggedOut {
+  url: string;
   status: "loggedOut";
 }
 
-export const defaultState: BackendState = { status: "loggedOut" };
+const maybeRootPath = "https://bank.demo.taler.net/demobanks/default/";
+
+export function getInitialBackendBaseURL(): string {
+  const overrideUrl = localStorage.getItem("bank-base-url");
+
+  return canonicalizeBaseUrl(overrideUrl ? overrideUrl : maybeRootPath);
+}
+
+export const defaultState: BackendState = {
+  status: "loggedOut",
+  url: getInitialBackendBaseURL()
+};
 
 export interface BackendStateHandler {
   state: BackendState;
-  clear(): void;
-  save(info: BackendInfo): void;
+  logOut(): void;
+  logIn(info: BackendCredentials): void;
 }
 /**
  * Return getters and setters for
@@ -52,7 +75,7 @@ export function useBackendState(): BackendStateHandler {
     "backend-state",
     JSON.stringify(defaultState),
   );
-  // const parsed = value !== undefined ? JSON.parse(value) : value;
+
   let parsed;
   try {
     parsed = JSON.parse(value!);
@@ -63,12 +86,162 @@ export function useBackendState(): BackendStateHandler {
 
   return {
     state,
-    clear() {
-      update(JSON.stringify(defaultState));
+    logOut() {
+      update(JSON.stringify({ ...defaultState, url: state.url }));
     },
-    save(info) {
-      const nextState: BackendState = { status: "loggedIn", ...info };
+    logIn(info) {
+      //admin is defined by the username
+      const nextState: BackendState = { status: "loggedIn", url: state.url, ...info, isUserAdministrator: info.username === "admin" };
       update(JSON.stringify(nextState));
     },
   };
 }
+
+interface useBackendType {
+  request: <T>(
+    path: string,
+    options?: RequestOptions,
+  ) => Promise<HttpResponseOk<T>>;
+  fetcher: <T>(endpoint: string) => Promise<HttpResponseOk<T>>;
+  multiFetcher: <T>(endpoint: string[]) => Promise<HttpResponseOk<T>[]>;
+  paginatedFetcher: <T>(args: [string, number, number]) => Promise<HttpResponseOk<T>>;
+  sandboxAccountsFetcher: <T>(args: [string, number, number, string]) => Promise<HttpResponseOk<T>>;
+}
+
+
+export function usePublicBackend(): useBackendType {
+  const { state } = useBackendContext();
+  const { request: requestHandler } = useApiContext();
+
+  const baseUrl = state.url
+
+  const request = useCallback(
+    function requestImpl<T>(
+      path: string,
+      options: RequestOptions = {},
+    ): Promise<HttpResponseOk<T>> {
+
+      return requestHandler<T>(baseUrl, path, options);
+    },
+    [baseUrl],
+  );
+
+  const fetcher = useCallback(
+    function fetcherImpl<T>(endpoint: string): Promise<HttpResponseOk<T>> {
+      return requestHandler<T>(baseUrl, endpoint);
+    },
+    [baseUrl],
+  );
+  const paginatedFetcher = useCallback(
+    function fetcherImpl<T>([endpoint, page, size]: [string, number, number]): Promise<HttpResponseOk<T>> {
+      return requestHandler<T>(baseUrl, endpoint, { params: { page: page || 1, size } });
+    },
+    [baseUrl],
+  );
+  const multiFetcher = useCallback(
+    function multiFetcherImpl<T>(
+      endpoints: string[],
+    ): Promise<HttpResponseOk<T>[]> {
+      return Promise.all(
+        endpoints.map((endpoint) => requestHandler<T>(baseUrl, endpoint)),
+      );
+    },
+    [baseUrl],
+  );
+  const sandboxAccountsFetcher = useCallback(
+    function fetcherImpl<T>([endpoint, page, size, account]: [string, number, number, string]): Promise<HttpResponseOk<T>> {
+      return requestHandler<T>(baseUrl, endpoint, { params: { page: page || 1, size } });
+    },
+    [baseUrl],
+  );
+  return { request, fetcher, paginatedFetcher, multiFetcher, sandboxAccountsFetcher };
+}
+
+export function useAuthenticatedBackend(): useBackendType {
+  const { state } = useBackendContext();
+  const { request: requestHandler } = useApiContext();
+
+  const creds = state.status === "loggedIn" ? state : undefined
+  const baseUrl = state.url
+
+  const request = useCallback(
+    function requestImpl<T>(
+      path: string,
+      options: RequestOptions = {},
+    ): Promise<HttpResponseOk<T>> {
+
+      return requestHandler<T>(baseUrl, path, { basicAuth: creds, ...options });
+    },
+    [baseUrl, creds],
+  );
+
+  const fetcher = useCallback(
+    function fetcherImpl<T>(endpoint: string): Promise<HttpResponseOk<T>> {
+      return requestHandler<T>(baseUrl, endpoint, { basicAuth: creds });
+    },
+    [baseUrl, creds],
+  );
+  const paginatedFetcher = useCallback(
+    function fetcherImpl<T>([endpoint, page = 0, size]: [string, number, number]): Promise<HttpResponseOk<T>> {
+      return requestHandler<T>(baseUrl, endpoint, { basicAuth: creds, params: { page, size } });
+    },
+    [baseUrl, creds],
+  );
+  const multiFetcher = useCallback(
+    function multiFetcherImpl<T>(
+      endpoints: string[],
+    ): Promise<HttpResponseOk<T>[]> {
+      return Promise.all(
+        endpoints.map((endpoint) => requestHandler<T>(baseUrl, endpoint, { basicAuth: creds })),
+      );
+    },
+    [baseUrl, creds],
+  );
+  const sandboxAccountsFetcher = useCallback(
+    function fetcherImpl<T>([endpoint, page, size, account]: [string, number, number, string]): Promise<HttpResponseOk<T>> {
+      return requestHandler<T>(baseUrl, endpoint, { basicAuth: creds, params: { page: page || 1, size } });
+    },
+    [baseUrl],
+  );
+  return { request, fetcher, paginatedFetcher, multiFetcher, sandboxAccountsFetcher };
+}
+
+export function useBackendConfig(): HttpResponse<SandboxBackend.Config, SandboxBackend.SandboxError> {
+  const { request } = usePublicBackend();
+
+  type Type = SandboxBackend.Config;
+
+  const [result, setResult] = useState<HttpResponse<Type, SandboxBackend.SandboxError>>({ loading: true });
+
+  useEffect(() => {
+    request<Type>(`/config`)
+      .then((data) => setResult(data))
+      .catch((error) => setResult(error));
+  }, [request]);
+
+  return result;
+}
+
+export function useMatchMutate(): (
+  re: RegExp,
+  value?: unknown,
+) => Promise<any> {
+  const { cache, mutate } = useSWRConfig();
+
+  if (!(cache instanceof Map)) {
+    throw new Error(
+      "matchMutate requires the cache provider to be a Map instance",
+    );
+  }
+
+  return function matchRegexMutate(re: RegExp, value?: unknown) {
+    const allKeys = Array.from(cache.keys());
+    const keys = allKeys.filter((key) => re.test(key));
+    const mutations = keys.map((key) => {
+      mutate(key, value, true);
+    });
+    return Promise.all(mutations);
+  };
+}
+
+