sharing components in web-util

1 files changed, 89 insertions, 0 deletions

diff --git a/packages/aml-backoffice-ui/src/context/config.ts b/packages/aml-backoffice-ui/src/context/config.ts
new file mode 100644
index 000000000..2866717de
--- /dev/null
+++ b/packages/aml-backoffice-ui/src/context/config.ts
@@ -0,0 +1,89 @@
+/*
+ This file is part of GNU Taler
+ (C) 2022 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+import { TalerExchangeApi, TalerExchangeHttpClient, TalerError } from "@gnu-taler/taler-util";
+import { BrowserHttpLib, useTranslationContext } from "@gnu-taler/web-util/browser";
+import { ComponentChildren, createContext, FunctionComponent, h, VNode } from "preact";
+import { useContext, useEffect, useState } from "preact/hooks";
+import { ErrorLoading } from "@gnu-taler/web-util/browser";
+
+/**
+ *
+ * @author Sebastian Javier Marchano (sebasjm)
+ */
+
+export type Type = {
+  url: URL,
+  config: TalerExchangeApi.ExchangeVersionResponse,
+  api: TalerExchangeHttpClient,
+};
+
+const Context = createContext<Type>(undefined as any);
+
+export const useExchangeApiContext = (): Type => useContext(Context);
+
+export type ConfigResult = undefined
+  | { type: "ok", config: TalerExchangeApi.ExchangeVersionResponse }
+  | { type: "incompatible", result: TalerExchangeApi.ExchangeVersionResponse, supported: string }
+  | { type: "error", error: TalerError }
+
+export const ExchangeApiProvider = ({
+  baseUrl,
+  children,
+  frameOnError,
+}: {
+  baseUrl: string,
+  children: ComponentChildren;
+  frameOnError: FunctionComponent<{ children: ComponentChildren }>,
+}): VNode => {
+  const [checked, setChecked] = useState<ConfigResult>()
+  const { i18n } = useTranslationContext();
+  const url = new URL(baseUrl)
+  const api = new TalerExchangeHttpClient(url.href, new BrowserHttpLib())
+  useEffect(() => {
+    api.getConfig()
+      .then((resp) => {
+        if (api.isCompatible(resp.body.version)) {
+          setChecked({ type: "ok", config: resp.body });
+        } else {
+          setChecked({ type: "incompatible", result: resp.body, supported: api.PROTOCOL_VERSION })
+        }
+      })
+      .catch((error: unknown) => {
+        if (error instanceof TalerError) {
+          setChecked({ type: "error", error });
+        }
+      });
+  }, []);
+
+  if (checked === undefined) {
+    return h(frameOnError, { children: h("div", {}, "loading...") })
+  }
+  if (checked.type === "error") {
+    return h(frameOnError, { children: h(ErrorLoading, { error: checked.error, showDetail: true }) })
+  }
+  if (checked.type === "incompatible") {
+    return h(frameOnError, { children: h("div", {}, i18n.str`the bank backend is not supported. supported version "${checked.supported}", server version "${checked.result.version}"`) })
+  }
+  const value: Type = {
+    url, config: checked.config, api
+  }
+  return h(Context.Provider, {
+    value,
+    children,
+  });
+};
+