From 697c028c4ac1dc4aa943efb1b30803b134dc491b Mon Sep 17 00:00:00 2001
From: Alex Gleason <alex@alexgleason.me>
Date: Wed, 1 Jun 2022 20:47:28 -0500
Subject: [PATCH] TimelineQueueButtonHeader: convert to tsx

---
 .../timeline_queue_button_header.js           | 119 ------------------
 .../timeline_queue_button_header.tsx          |  83 ++++++++++++
 2 files changed, 83 insertions(+), 119 deletions(-)
 delete mode 100644 app/soapbox/components/timeline_queue_button_header.js
 create mode 100644 app/soapbox/components/timeline_queue_button_header.tsx

diff --git a/app/soapbox/components/timeline_queue_button_header.js b/app/soapbox/components/timeline_queue_button_header.js
deleted file mode 100644
index 29a8e787a..000000000
--- a/app/soapbox/components/timeline_queue_button_header.js
+++ /dev/null
@@ -1,119 +0,0 @@
-import classNames from 'classnames';
-import { throttle } from 'lodash';
-import PropTypes from 'prop-types';
-import React from 'react';
-import { injectIntl } from 'react-intl';
-import { connect } from 'react-redux';
-
-import { getSettings } from 'soapbox/actions/settings';
-import Icon from 'soapbox/components/icon';
-import { Text } from 'soapbox/components/ui';
-
-const mapStateToProps = state => {
-  const settings = getSettings(state);
-
-  return {
-    autoload: settings.get('autoloadTimelines'),
-  };
-};
-
-export default @connect(mapStateToProps)
-@injectIntl
-class TimelineQueueButtonHeader extends React.PureComponent {
-
-  static propTypes = {
-    onClick: PropTypes.func.isRequired,
-    count: PropTypes.number,
-    message: PropTypes.object.isRequired,
-    threshold: PropTypes.number,
-    intl: PropTypes.object.isRequired,
-    autoload: PropTypes.bool,
-    autoloadThreshold: PropTypes.number,
-  };
-
-  static defaultProps = {
-    count: 0,
-    threshold: 400,
-    autoload: true,
-    autoloadThreshold: 50,
-  };
-
-  state = {
-    scrolled: false,
-  }
-
-  componentDidMount() {
-    this.attachScrollListener();
-  }
-
-  componentWillUnmount() {
-    this.detachScrollListener();
-  }
-
-  componentDidUpdate(prevProps, prevState) {
-    const { scrollTop } = (document.scrollingElement || document.documentElement);
-    const { count, onClick, autoload, autoloadThreshold } = this.props;
-
-    if (autoload && scrollTop <= autoloadThreshold && count !== prevProps.count) {
-      onClick();
-    }
-  }
-
-  attachScrollListener() {
-    window.addEventListener('scroll', this.handleScroll);
-  }
-
-  detachScrollListener() {
-    window.removeEventListener('scroll', this.handleScroll);
-  }
-
-  handleScroll = throttle(() => {
-    const { scrollTop } = (document.scrollingElement || document.documentElement);
-    const { threshold, onClick, autoload, autoloadThreshold } = this.props;
-
-    if (autoload && scrollTop <= autoloadThreshold) {
-      onClick();
-    }
-
-    if (scrollTop > threshold) {
-      this.setState({ scrolled: true });
-    } else {
-      this.setState({ scrolled: false });
-    }
-  }, 150, { trailing: true });
-
-  scrollUp = () => {
-    window.scrollTo({ top: 0, behavior: 'smooth' });
-  };
-
-  handleClick = e => {
-    setTimeout(this.scrollUp, 10);
-    this.props.onClick(e);
-  }
-
-  render() {
-    const { count, message, intl } = this.props;
-    const { scrolled } = this.state;
-
-    const visible = count > 0 && scrolled;
-
-    const classes = classNames('left-1/2 -translate-x-1/2 fixed top-20 z-50', {
-      'hidden': !visible,
-    });
-
-    return (
-      <div className={classes}>
-        <a className='flex items-center bg-primary-600 hover:bg-primary-700 hover:scale-105 active:scale-100 transition-transform text-white rounded-full px-4 py-2 space-x-1.5 cursor-pointer whitespace-nowrap' onClick={this.handleClick}>
-          <Icon src={require('@tabler/icons/icons/arrow-bar-to-up.svg')} />
-
-          {(count > 0) && (
-            <Text theme='inherit' size='sm'>
-              {intl.formatMessage(message, { count })}
-            </Text>
-          )}
-        </a>
-      </div>
-    );
-  }
-
-}
diff --git a/app/soapbox/components/timeline_queue_button_header.tsx b/app/soapbox/components/timeline_queue_button_header.tsx
new file mode 100644
index 000000000..e0d65fc67
--- /dev/null
+++ b/app/soapbox/components/timeline_queue_button_header.tsx
@@ -0,0 +1,83 @@
+import classNames from 'classnames';
+import { throttle } from 'lodash';
+import React, { useState, useEffect, useCallback } from 'react';
+import { useIntl, MessageDescriptor } from 'react-intl';
+
+import Icon from 'soapbox/components/icon';
+import { Text } from 'soapbox/components/ui';
+import { useSettings } from 'soapbox/hooks';
+
+interface ITimelineQueueButtonHeader {
+  onClick: () => void,
+  count?: number,
+  message: MessageDescriptor,
+  threshold?: number,
+  autoloadThreshold?: number,
+}
+
+const TimelineQueueButtonHeader: React.FC<ITimelineQueueButtonHeader> = ({
+  onClick,
+  count = 0,
+  message,
+  threshold = 400,
+  autoloadThreshold = 50,
+}) => {
+  const intl = useIntl();
+  const settings = useSettings();
+
+  const [scrolled, setScrolled] = useState<boolean>(false);
+  const autoload = settings.get('autoloadTimelines') === true;
+
+  const handleScroll = useCallback(throttle(() => {
+    const { scrollTop } = (document.scrollingElement || document.documentElement);
+
+    if (autoload && scrollTop <= autoloadThreshold) {
+      onClick();
+    }
+
+    if (scrollTop > threshold) {
+      setScrolled(true);
+    } else {
+      setScrolled(false);
+    }
+  }, 150, { trailing: true }), []);
+
+  const scrollUp = () => {
+    window.scrollTo({ top: 0, behavior: 'smooth' });
+  };
+
+  const handleClick: React.MouseEventHandler = () => {
+    setTimeout(scrollUp, 10);
+    onClick();
+  };
+
+  useEffect(() => {
+    window.addEventListener('scroll', handleScroll);
+
+    return () => {
+      window.removeEventListener('scroll', handleScroll);
+    };
+  }, []);
+
+  const visible = count > 0 && scrolled;
+
+  const classes = classNames('left-1/2 -translate-x-1/2 fixed top-20 z-50', {
+    'hidden': !visible,
+  });
+
+  return (
+    <div className={classes}>
+      <a className='flex items-center bg-primary-600 hover:bg-primary-700 hover:scale-105 active:scale-100 transition-transform text-white rounded-full px-4 py-2 space-x-1.5 cursor-pointer whitespace-nowrap' onClick={handleClick}>
+        <Icon src={require('@tabler/icons/icons/arrow-bar-to-up.svg')} />
+
+        {(count > 0) && (
+          <Text theme='inherit' size='sm'>
+            {intl.formatMessage(message, { count })}
+          </Text>
+        )}
+      </a>
+    </div>
+  );
+};
+
+export default TimelineQueueButtonHeader;