add IDs for reply arrows at center and RHS (#6311)

webapp/components/common/comment_icon.jsx

@@ -0,0 +1,55 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import React from 'react';
+import Constants from 'utils/constants.jsx';
+import * as Utils from 'utils/utils.jsx';
+
+export default function CommentIcon(props) {
+    let commentCountSpan = '';
+    let iconStyle = 'comment-icon__container';
+    if (props.commentCount > 0) {
+        iconStyle += ' icon--show';
+        commentCountSpan = (
+            <span className='comment-count'>
+                {props.commentCount}
+            </span>
+        );
+    } else if (props.searchStyle !== '') {
+        iconStyle = iconStyle + ' ' + props.searchStyle;
+    }
+
+    let commentIconId = props.idPrefix;
+    if (props.idCount > -1) {
+        commentIconId += props.idCount;
+    }
+
+    return (
+        <a
+            id={Utils.createSafeId(commentIconId)}
+            href='#'
+            className={iconStyle}
+            onClick={props.handleCommentClick}
+        >
+            <span
+                className='comment-icon'
+                dangerouslySetInnerHTML={{__html: Constants.REPLY_ICON}}
+            />
+            {commentCountSpan}
+        </a>
+    );
+}
+
+CommentIcon.propTypes = {
+    idPrefix: React.PropTypes.string.isRequired,
+    idCount: React.PropTypes.number,
+    handleCommentClick: React.PropTypes.func.isRequired,
+    searchStyle: React.PropTypes.string,
+    commentCount: React.PropTypes.number
+};
+
+CommentIcon.defaultProps = {
+    idCount: -1,
+    searchStyle: '',
+    commentCount: 0
+};