refactor(component): convert TextDismissableBar from class to function component (#27955)

* refactor(component): convert TextDismissableBar from class to function component

* perf:Code optimized

* refactor(component):props vertically formatted, getDismissed function moved outside

* Update webapp/channels/src/components/announcement_bar/text_dismissable_bar.tsx

Co-authored-by: Daniel Espino García <larkox@gmail.com>

* refactor:setDismissed formatted vertically

* test(text_dismissable_bar):snapshot test updated

* refactor: remove type from shallow rendering in TextDismissableBar test

---------

Co-authored-by: Daniel Espino García <larkox@gmail.com>
Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/components/announcement_bar/__snapshots__/text_dismissable_bar.test.tsx.snap

@@ -20,7 +20,6 @@ exports[`components/TextDismissableBar should match snapshot 1`] = `
       />
     </React.Fragment>
   }
-  onDismissal={[MockFunction]}
   showCloseButton={true}
 />
 `;
@@ -45,7 +44,6 @@ exports[`components/TextDismissableBar should match snapshot, with an internal a
       />
     </React.Fragment>
   }
-  onDismissal={[MockFunction]}
   showCloseButton={true}
   siteURL="http://testurl.com"
 />
@@ -71,7 +69,6 @@ exports[`components/TextDismissableBar should match snapshot, with an internal u
       />
     </React.Fragment>
   }
-  onDismissal={[MockFunction]}
   showCloseButton={true}
   siteURL="http://testurl.com"
 />
@@ -97,7 +94,6 @@ exports[`components/TextDismissableBar should match snapshot, with ean external
       />
     </React.Fragment>
   }
-  onDismissal={[MockFunction]}
   showCloseButton={true}
   siteURL="http://testurl.com"
 />
@@ -123,7 +119,6 @@ exports[`components/TextDismissableBar should match snapshot, with link but with
       />
     </React.Fragment>
   }
-  onDismissal={[MockFunction]}
   showCloseButton={true}
 />
 `;

webapp/channels/src/components/announcement_bar/text_dismissable_bar.test.tsx

@@ -16,45 +16,35 @@ describe('components/TextDismissableBar', () => {
 
     test('should match snapshot', () => {
         const props = baseProps;
-        const wrapper = shallow<TextDismissableBar>(
-            <TextDismissableBar {...props}/>,
-        );
+        const wrapper = shallow(<TextDismissableBar {...props}/>);
 
         expect(wrapper).toMatchSnapshot();
     });
 
     test('should match snapshot, with link but without siteURL', () => {
         const props = {...baseProps, text: 'A [link](http://testurl.com/admin_console/)'};
-        const wrapper = shallow<TextDismissableBar>(
-            <TextDismissableBar {...props}/>,
-        );
+        const wrapper = shallow(<TextDismissableBar {...props}/>);
 
         expect(wrapper).toMatchSnapshot();
     });
 
     test('should match snapshot, with an internal url', () => {
         const props = {...baseProps, text: 'A [link](http://testurl.com/admin_console/) with an internal url', siteURL: 'http://testurl.com'};
-        const wrapper = shallow<TextDismissableBar>(
-            <TextDismissableBar {...props}/>,
-        );
+        const wrapper = shallow(<TextDismissableBar {...props}/>);
 
         expect(wrapper).toMatchSnapshot();
     });
 
     test('should match snapshot, with ean external url', () => {
         const props = {...baseProps, text: 'A [link](http://otherurl.com/admin_console/) with an external url', siteURL: 'http://testurl.com'};
-        const wrapper = shallow<TextDismissableBar>(
-            <TextDismissableBar {...props}/>,
-        );
+        const wrapper = shallow(<TextDismissableBar {...props}/>);
 
         expect(wrapper).toMatchSnapshot();
     });
 
     test('should match snapshot, with an internal and an external link', () => {
         const props = {...baseProps, text: 'A [link](http://testurl.com/admin_console/) with an internal url and a [link](http://other-url.com/admin_console/) with an external url', siteURL: 'http://testurl.com'};
-        const wrapper = shallow<TextDismissableBar>(
-            <TextDismissableBar {...props}/>,
-        );
+        const wrapper = shallow(<TextDismissableBar {...props}/>);
 
         expect(wrapper).toMatchSnapshot();
     });

webapp/channels/src/components/announcement_bar/text_dismissable_bar.tsx

@@ -1,7 +1,7 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 
-import React from 'react';
+import React, {useCallback, useEffect, useState} from 'react';
 
 import {trackEvent} from 'actions/telemetry_actions.jsx';
 
@@ -20,67 +20,58 @@ interface Props extends Partial<AnnouncementBarProps> {
     className?: string;
 }
 
-type State = {
-    dismissed: boolean;
-}
+const options = {
+    singleline: true,
+    mentionHighlight: false,
+};
 
-export default class TextDismissableBar extends React.PureComponent<Props, State> {
-    constructor(props: Props) {
-        super(props);
+const getDismissed = (text?: React.ReactNode) => localStorage.getItem(localStoragePrefix + text?.toString()) === 'true';
 
-        this.state = {
-            dismissed: true,
-        };
-    }
+const TextDismissableBar = ({
+    allowDismissal,
+    text,
+    onDismissal,
+    ...extraProps
+}: Props) => {
+    const [dismissed, setDismissed] = useState<boolean>(() => getDismissed(text));
 
-    static getDerivedStateFromProps(props: Props) {
-        const dismissed = localStorage.getItem(localStoragePrefix + props.text?.toString());
-        return {
-            dismissed: (dismissed === 'true'),
-        };
-    }
+    useEffect(() => {
+        setDismissed(getDismissed(text));
+    }, [text]);
 
-    handleDismiss = () => {
-        if (!this.props.allowDismissal) {
+    const handleDismiss = useCallback(() => {
+        if (!allowDismissal) {
             return;
         }
         trackEvent('signup', 'click_dismiss_bar');
 
-        localStorage.setItem(localStoragePrefix + this.props.text?.toString(), 'true');
-        this.setState({
-            dismissed: true,
-        });
-        if (this.props.onDismissal) {
-            this.props.onDismissal();
-        }
-    };
+        localStorage.setItem(localStoragePrefix + text?.toString(), 'true');
+        setDismissed(true);
+        onDismissal?.();
+    }, [allowDismissal, onDismissal, text]);
 
-    render() {
-        if (this.state.dismissed) {
-            return null;
-        }
-        const {allowDismissal, text, ...extraProps} = this.props;
-        return (
-            <AnnouncementBar
-                {...extraProps}
-                showCloseButton={allowDismissal}
-                handleClose={this.handleDismiss}
-                message={
-                    <>
-                        <i className='icon icon-information-outline'/>
-                        {typeof text === 'string' ? (
-                            <Markdown
-                                message={text}
-                                options={{
-                                    singleline: true,
-                                    mentionHighlight: false,
-                                }}
-                            />
-                        ) : text}
-                    </>
-                }
-            />
-        );
+    if (dismissed) {
+        return null;
     }
-}
 
+    return (
+        <AnnouncementBar
+            {...extraProps}
+            showCloseButton={allowDismissal}
+            handleClose={handleDismiss}
+            message={
+                <>
+                    <i className='icon icon-information-outline'/>
+                    {typeof text === 'string' ? (
+                        <Markdown
+                            message={text}
+                            options={options}
+                        />
+                    ) : text}
+                </>
+            }
+        />
+    );
+};
+
+export default TextDismissableBar;