From 880961034c81e85e191c6c4b845d96506bbd4ea7 Mon Sep 17 00:00:00 2001
From: Sebastian <sebasjm@gmail.com>
Date: Mon, 12 Dec 2022 10:57:14 -0300
Subject: compose, testing and async into web-util

---
 packages/web-util/src/hooks/index.ts          |  3 +-
 packages/web-util/src/hooks/useAsyncAsHook.ts | 91 +++++++++++++++++++++++++++
 2 files changed, 93 insertions(+), 1 deletion(-)
 create mode 100644 packages/web-util/src/hooks/useAsyncAsHook.ts

(limited to 'packages/web-util/src/hooks')

diff --git a/packages/web-util/src/hooks/index.ts b/packages/web-util/src/hooks/index.ts
index f18d61b9c..9ac56c4ac 100644
--- a/packages/web-util/src/hooks/index.ts
+++ b/packages/web-util/src/hooks/index.ts
@@ -1,3 +1,4 @@
 
 export { useLang } from "./useLang.js";
-export { useLocalStorage, useNotNullLocalStorage } from "./useLocalStorage.js"
\ No newline at end of file
+export { useLocalStorage, useNotNullLocalStorage } from "./useLocalStorage.js"
+export { useAsyncAsHook, HookError, HookOk, HookResponse, HookResponseWithRetry, HookGenericError, HookOperationalError } from "./useAsyncAsHook.js"
\ No newline at end of file
diff --git a/packages/web-util/src/hooks/useAsyncAsHook.ts b/packages/web-util/src/hooks/useAsyncAsHook.ts
new file mode 100644
index 000000000..48d29aa45
--- /dev/null
+++ b/packages/web-util/src/hooks/useAsyncAsHook.ts
@@ -0,0 +1,91 @@
+/*
+ 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 { TalerErrorDetail } from "@gnu-taler/taler-util";
+// import { TalerError } from "@gnu-taler/taler-wallet-core";
+import { useEffect, useMemo, useState } from "preact/hooks";
+
+export interface HookOk<T> {
+  hasError: false;
+  response: T;
+}
+
+export type HookError = HookGenericError | HookOperationalError;
+
+export interface HookGenericError {
+  hasError: true;
+  operational: false;
+  message: string;
+}
+
+export interface HookOperationalError {
+  hasError: true;
+  operational: true;
+  details: TalerErrorDetail;
+}
+
+interface WithRetry {
+  retry: () => void;
+}
+
+export type HookResponse<T> = HookOk<T> | HookError | undefined;
+export type HookResponseWithRetry<T> =
+  | ((HookOk<T> | HookError) & WithRetry)
+  | undefined;
+
+export function useAsyncAsHook<T>(
+  fn: () => Promise<T | false>,
+  deps?: any[],
+): HookResponseWithRetry<T> {
+  const [result, setHookResponse] = useState<HookResponse<T>>(undefined);
+
+  const args = useMemo(
+    () => ({
+      fn,
+      // eslint-disable-next-line react-hooks/exhaustive-deps
+    }),
+    deps || [],
+  );
+
+  async function doAsync(): Promise<void> {
+    try {
+      const response = await args.fn();
+      if (response === false) return;
+      setHookResponse({ hasError: false, response });
+    } catch (e) {
+      // if (e instanceof TalerError) {
+      //   setHookResponse({
+      //     hasError: true,
+      //     operational: true,
+      //     details: e.errorDetail,
+      //   });
+      // } else
+      if (e instanceof Error) {
+        setHookResponse({
+          hasError: true,
+          operational: false,
+          message: e.message,
+        });
+      }
+    }
+  }
+
+  useEffect(() => {
+    doAsync();
+  }, [args]);
+
+  if (!result) return undefined;
+  return { ...result, retry: doAsync };
+}
-- 
cgit v1.2.3