Loading and errors HOCs

src/bootstrap/Spinner.js

@@ -28,7 +28,7 @@ export function Spinner({
 }) {
     if (!fullScreen) {
         return (
-            <div className={`spinner-wrapper ${className || ""}`} {...props}>
+            <div className={`spinner-wrapper ${className || "my-3 text-center"}`} {...props}>
                 <SpinnerElement>{children}</SpinnerElement>
             </div>
         );

src/form/components/ForisForm.js

@@ -5,16 +5,19 @@
  * See /LICENSE for more information.
  */
 
-import React, { useEffect, useState } from "react";
+import React, { useEffect } from "react";
 import PropTypes from "prop-types";
 
 import { Spinner } from "bootstrap/Spinner";
 import { useAPIPost } from "api/hooks";
 
 import { Prompt } from "react-router";
+import { API_STATE } from "api/utils";
+import { ErrorMessage } from "utils/ErrorMessage";
+import { useAlert } from "alertContext/AlertContext";
+import { ALERT_TYPES } from "bootstrap/Alert";
 import { useForisModule, useForm } from "../hooks";
 import { STATES as SUBMIT_BUTTON_STATES, SubmitButton } from "./SubmitButton";
-import { FailAlert, SuccessAlert } from "./alerts";
 
 ForisForm.propTypes = {
     /** WebSocket object see `scr/common/WebSockets.js`. */
@@ -69,22 +72,34 @@ export function ForisForm({
     children,
 }) {
     const [formState, onFormChangeHandler, resetFormData] = useForm(validator, prepData);
+    const [setAlert] = useAlert();
 
     const [forisModuleState] = useForisModule(ws, forisConfig);
     useEffect(() => {
-        if (forisModuleState.data) {
+        if (forisModuleState.state === API_STATE.SUCCESS) {
             resetFormData(forisModuleState.data);
         }
-    }, [forisModuleState.data, resetFormData, prepData]);
+    }, [forisModuleState, resetFormData, prepData]);
 
     const [postState, post] = useAPIPost(forisConfig.endpoint);
     useEffect(() => {
-        if (postState.isSuccess) postCallback();
+        if (postState.state === API_STATE.SUCCESS) {
-    }, [postCallback, postState.isSuccess]);
+            postCallback();
+            setAlert(_("Settings saved successfully"), ALERT_TYPES.SUCCESS);
+        } else if (postState.state === API_STATE.ERROR) {
+            setAlert(_("Cannot save settings"));
+        }
+    }, [postCallback, postState.state, setAlert]);
 
+    if (forisModuleState.state === API_STATE.ERROR) {
+        return <ErrorMessage />;
+    }
+    if (!formState.data) {
+        return <Spinner />;
+    }
 
-    function onSubmitHandler(e) {
+    function onSubmitHandler(event) {
-        e.preventDefault();
+        event.preventDefault();
         resetFormData();
         const copiedFormData = JSON.parse(JSON.stringify(formState.data));
         const preparedData = prepDataToSubmit(copiedFormData);
@@ -92,16 +107,18 @@ export function ForisForm({
     }
 
     function getSubmitButtonState() {
-        if (postState.isSending) return SUBMIT_BUTTON_STATES.SAVING;
+        if (postState.state === API_STATE.SENDING) {
-        if (forisModuleState.isLoading) return SUBMIT_BUTTON_STATES.LOAD;
+            return SUBMIT_BUTTON_STATES.SAVING;
+        }
+        if (forisModuleState.state === API_STATE.SENDING) {
+            return SUBMIT_BUTTON_STATES.LOAD;
+        }
         return SUBMIT_BUTTON_STATES.READY;
     }
 
-    const [alertIsDismissed, setAlertIsDismissed] = useState(false);
+    const formIsDisabled = (disabled
-
+        || forisModuleState.state === API_STATE.SENDING
-    if (!formState.data) return <Spinner className="row justify-content-center" />;
+        || postState.state === API_STATE.SENDING);
-
-    const formIsDisabled = disabled || forisModuleState.isLoading || postState.isSending;
     const submitButtonIsDisabled = disabled || !!formState.errors;
 
     const childrenWithFormProps = React.Children.map(
@@ -123,19 +140,9 @@ export function ForisForm({
         return _("Changes you made may not be saved. Are you sure you want to leave?");
     }
 
-    let alert = null;
-    if (!alertIsDismissed) {
-        if (postState.isSuccess) {
-            alert = <SuccessAlert onDismiss={() => setAlertIsDismissed(true)} />;
-        } else if (postState.isError) {
-            alert = <FailAlert onDismiss={() => setAlertIsDismissed(true)} />;
-        }
-    }
-
     return (
         <>
             <Prompt message={getMessageOnLeavingPage} />
-            {alert}
             <form onSubmit={onSubmit}>
                 {childrenWithFormProps}
                 <SubmitButton

src/form/components/alerts.js

@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
- *
- * This is free software, licensed under the GNU General Public License v3.
- * See /LICENSE for more information.
- */
-
-import React from "react";
-import PropTypes from "prop-types";
-
-import { Alert } from "bootstrap/Alert";
-import { Portal } from "utils/Portal";
-
-SuccessAlert.propTypes = {
-    onDismiss: PropTypes.func.isRequired,
-};
-
-const ALERT_CONTAINER_ID = "alert-container";
-
-export function SuccessAlert({ onDismiss }) {
-    return (
-        <Portal containerId={ALERT_CONTAINER_ID}>
-            <Alert
-                type="success"
-                message={_("Settings were successfully saved.")}
-                onDismiss={onDismiss}
-            />
-        </Portal>
-    );
-}
-
-FailAlert.propTypes = {
-    onDismiss: PropTypes.func.isRequired,
-};
-
-export function FailAlert({ onDismiss }) {
-    return (
-        <Portal containerId={ALERT_CONTAINER_ID}>
-            <Alert
-                type="danger"
-                message={_("Settings update was failed.")}
-                onDismiss={onDismiss}
-            />
-        </Portal>
-    );
-}

src/index.js

@@ -50,6 +50,10 @@ export { WebSockets } from "webSockets/WebSockets";
 // Utils
 export { Portal } from "utils/Portal";
 export { undefinedIfEmpty, withoutUndefinedKeys, onlySpecifiedKeys } from "utils/objectHelpers";
+export {
+    withEither, withSpinner, withSending, withSpinnerOnSending, withError, withErrorMessage,
+} from "utils/conditionalHOCs";
+export { ErrorMessage } from "utils/ErrorMessage";
 
 // Foris URL
 export { ForisURLs, REFORIS_URL_PREFIX } from "forisUrls";

src/utils/ErrorMessage.js

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+ *
+ * This is free software, licensed under the GNU General Public License v3.
+ * See /LICENSE for more information.
+ */
+
+import React from "react";
+
+export function ErrorMessage() {
+    return (
+        <p className="text-center text-danger">
+            {_("An error occurred while fetching data.")}
+        </p>
+    );
+}

src/utils/__tests__/__snapshots__/conditionalHOCs.test.js.snap

@@ -0,0 +1,61 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`conditional HOCs withError should render error message 1`] = `
+<div>
+  <p
+    class="text-center text-danger"
+  >
+    An error occurred while fetching data.
+  </p>
+</div>
+`;
+
+exports[`conditional HOCs withErrorMessage should render error message 1`] = `
+<div>
+  <p
+    class="text-center text-danger"
+  >
+    An error occurred while fetching data.
+  </p>
+</div>
+`;
+
+exports[`conditional HOCs withSpinner should render spinner 1`] = `
+<div>
+  <div
+    class="spinner-wrapper my-3 text-center"
+  >
+    <div
+      class="spinner-border "
+      role="status"
+    >
+      <span
+        class="sr-only"
+      />
+    </div>
+    <div
+      class="spinner-text"
+    />
+  </div>
+</div>
+`;
+
+exports[`conditional HOCs withSpinnerOnSending should render spinner 1`] = `
+<div>
+  <div
+    class="spinner-wrapper my-3 text-center"
+  >
+    <div
+      class="spinner-border "
+      role="status"
+    >
+      <span
+        class="sr-only"
+      />
+    </div>
+    <div
+      class="spinner-text"
+    />
+  </div>
+</div>
+`;

src/utils/__tests__/conditionalHOCs.test.js

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+ *
+ * This is free software, licensed under the GNU General Public License v3.
+ * See /LICENSE for more information.
+ */
+
+import React from "react";
+import { render } from "customTestRender";
+import {
+    withEither, withSpinner, withSending, withSpinnerOnSending, withError, withErrorMessage,
+} from "../conditionalHOCs";
+import { API_STATE } from "api/utils";
+
+describe("conditional HOCs", () => {
+    const First = () => <p>First</p>;
+    const Alternative = () => <p>Alternative</p>;
+
+    describe("withEither", () => {
+        it("should render First component", () => {
+            const withAlternative = withEither(() => false, Alternative);
+            const FirstWithConditional = withAlternative(First);
+            const { getByText } = render(<FirstWithConditional />);
+            expect(getByText("First")).toBeDefined();
+        });
+
+        it("should render Alternative component", () => {
+            const withAlternative = withEither(() => true, Alternative);
+            const FirstWithConditional = withAlternative(First);
+            const { getByText } = render(<FirstWithConditional />);
+            expect(getByText("Alternative")).toBeDefined();
+        });
+    });
+
+    describe("withSpinner", () => {
+        it("should render First component", () => {
+            const withSpinnerHidden = withSpinner(() => false);
+            const FirstWithConditional = withSpinnerHidden(First);
+            const { getByText } = render(<FirstWithConditional />);
+            expect(getByText("First")).toBeDefined();
+        });
+
+        it("should render spinner", () => {
+            const withSpinnerVisible = withSpinner(() => true);
+            const FirstWithConditional = withSpinnerVisible(First);
+            const { container } = render(<FirstWithConditional />);
+            expect(container).toMatchSnapshot();
+        });
+    });
+
+    describe("withSending", () => {
+        it("should render First component", () => {
+            const withAlternative = withSending(Alternative);
+            const FirstWithConditional = withAlternative(First);
+            const { getByText } = render(<FirstWithConditional apiState={API_STATE.SUCCESS} />);
+            expect(getByText("First")).toBeDefined();
+        });
+
+        it("should render Alternative component", () => {
+            const withAlternative = withSending(Alternative);
+            const FirstWithConditional = withAlternative(First);
+            const { getByText } = render(<FirstWithConditional apiState={API_STATE.SENDING} />);
+            expect(getByText("Alternative")).toBeDefined();
+        });
+    });
+
+    describe("withSpinnerOnSending", () => {
+        it("should render First component", () => {
+            const FirstWithConditional = withSpinnerOnSending(First);
+            const { getByText } = render(<FirstWithConditional apiState={API_STATE.SUCCESS} />);
+            expect(getByText("First")).toBeDefined();
+        });
+
+        it("should render spinner", () => {
+            const FirstWithConditional = withSpinnerOnSending(First);
+            const { container } = render(<FirstWithConditional apiState={API_STATE.SENDING} />);
+            expect(container).toMatchSnapshot();
+        });
+    });
+
+    describe("withError", () => {
+        it("should render First component", () => {
+            const withErrorHidden = withError(() => false);
+            const FirstWithConditional = withErrorHidden(First);
+            const { getByText } = render(<FirstWithConditional />);
+            expect(getByText("First")).toBeDefined();
+        });
+
+        it("should render error message", () => {
+            const withErrorVisible = withError(() => true);
+            const FirstWithConditional = withErrorVisible(First);
+            const { container } = render(<FirstWithConditional />);
+            expect(container).toMatchSnapshot();
+        });
+    });
+
+    describe("withErrorMessage", () => {
+        it("should render First component", () => {
+            const FirstWithConditional = withErrorMessage(First);
+            const { getByText } = render(<FirstWithConditional apiState={API_STATE.SUCCESS} />);
+            expect(getByText("First")).toBeDefined();
+        });
+
+        it("should render error message", () => {
+            const FirstWithConditional = withErrorMessage(First);
+            const { container } = render(<FirstWithConditional apiState={API_STATE.ERROR} />);
+            expect(container).toMatchSnapshot();
+        });
+    });
+});

src/utils/conditionalHOCs.js

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+ *
+ * This is free software, licensed under the GNU General Public License v3.
+ * See /LICENSE for more information.
+ */
+
+import React from "react";
+
+import { Spinner } from "bootstrap/Spinner";
+import { API_STATE } from "api/utils";
+import { ErrorMessage } from "./ErrorMessage";
+
+function withEither(conditionalFn, Either) {
+    return (Component) => (props) => {
+        if (conditionalFn(props)) {
+            return <Either />;
+        }
+        return <Component {...props} />;
+    };
+}
+
+// Loading
+
+function isSending(props) {
+    if (Array.isArray(props.apiState)) {
+        return props.apiState.some(
+            (state) => [API_STATE.INIT, API_STATE.SENDING].includes(state),
+        );
+    }
+    return [API_STATE.INIT, API_STATE.SENDING].includes(props.apiState);
+}
+
+const withSpinner = (conditionalFn) => withEither(conditionalFn, Spinner);
+const withSending = (Either) => withEither(isSending, Either);
+const withSpinnerOnSending = withSpinner(isSending);
+
+// Error handling
+
+const withError = (conditionalFn) => withEither(conditionalFn, ErrorMessage);
+const withErrorMessage = withError(
+    (props) => {
+        if (Array.isArray(props.apiState)) {
+            return props.apiState.includes(API_STATE.ERROR);
+        }
+        return props.apiState === API_STATE.ERROR;
+    },
+);
+
+export {
+    withEither, withSpinner, withSending, withSpinnerOnSending, withError, withErrorMessage,
+};