[Glitch] Rename JSX files with proper .jsx extension

Port 44a7d87cb1 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/components/permalink.jsx

@@ -0,0 +1,51 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+export default class Permalink extends React.PureComponent {
+
+  static contextTypes = {
+    router: PropTypes.object,
+  };
+
+  static propTypes = {
+    className: PropTypes.string,
+    href: PropTypes.string.isRequired,
+    to: PropTypes.string.isRequired,
+    children: PropTypes.node,
+    onInterceptClick: PropTypes.func,
+  };
+
+  handleClick = (e) => {
+    if (e.button === 0 && !(e.ctrlKey || e.metaKey)) {
+      if (this.props.onInterceptClick && this.props.onInterceptClick()) {
+        e.preventDefault();
+        return;
+      }
+
+      if (this.context.router) {
+        e.preventDefault();
+        let state = { ...this.context.router.history.location.state };
+        state.mastodonBackSteps = (state.mastodonBackSteps || 0) + 1;
+        this.context.router.history.push(this.props.to, state);
+      }
+    }
+  };
+
+  render () {
+    const {
+      children,
+      className,
+      href,
+      to,
+      onInterceptClick,
+      ...other
+    } = this.props;
+
+    return (
+      <a target='_blank' href={href} onClick={this.handleClick} {...other} className={`permalink${className ? ' ' + className : ''}`}>
+        {children}
+      </a>
+    );
+  }
+
+}