Replace Ember app with Mithril app

js/forum/src/components/composer-body.js

@@ -0,0 +1,45 @@
+import Component from 'flarum/component';
+import LoadingIndicator from 'flarum/components/loading-indicator';
+import TextEditor from 'flarum/components/text-editor';
+import avatar from 'flarum/helpers/avatar';
+import listItems from 'flarum/helpers/list-items';
+
+export default class ComposerBody extends Component {
+  constructor(props) {
+    super(props);
+
+    this.loading = m.prop(false);
+    this.disabled = m.prop(false);
+    this.content = m.prop(this.props.originalContent);
+  }
+
+  view() {
+    return m('div', {config: this.element}, [
+      avatar(this.props.user, {className: 'composer-avatar'}),
+      m('div.composer-body', [
+        m('ul.composer-header', listItems(this.headerItems().toArray())),
+        m('div.composer-editor', TextEditor.component({
+          submitLabel: this.props.submitLabel,
+          placeholder: this.props.placeholder,
+          disabled: this.loading(),
+          onchange: this.content,
+          onsubmit: this.onsubmit.bind(this),
+          value: this.content()
+        }))
+      ]),
+      LoadingIndicator.component({className: 'composer-loading'+(this.loading() ? ' active' : '')})
+    ]);
+  }
+
+  focus() {
+    this.$().find(':input:enabled:visible:first').focus();
+  }
+
+  preventExit() {
+    return this.content() != this.props.originalContent && !confirm(this.props.confirmExit);
+  }
+
+  onsubmit(value) {
+    //
+  }
+}