Added SortBlock component

• Added:
- SortBlock component

app/javascript/gabsocial/components/sort_block.js

@@ -0,0 +1,87 @@
+import { Fragment } from 'react'
+import { defineMessages, injectIntl } from 'react-intl'
+import Text from '../components/text'
+import Button from '../components/button'
+import DotTextSeperator from '../components/dot_text_seperator'
+
+const messages = defineMessages({
+  sortBy: { id: 'comment_sort.title', defaultMessage: 'Sort by' },
+})
+
+export default
+@injectIntl
+class SortBlock extends PureComponent {
+
+  static propTypes = {
+    intl: PropTypes.object.isRequired,
+    value: PropTypes.string.isRequired,
+    subValue: PropTypes.string,
+    onClickValue: PropTypes.func.isRequired,
+    onClickSubValue: PropTypes.func,
+  }
+
+  handleOnClickValue = () => {
+    this.props.onClickValue(this.valueBtn)
+  }
+
+  handleOnClickSubValue = () => {
+    this.props.onClickSubValue(this.subValueBtn)
+  }
+
+  setValueBtnRef = (c) => {
+    this.valueBtn = c
+  }
+
+  setSubValueBtnRef = (c) => {
+    this.subValueBtn = c
+  }
+
+  render() {
+    const {
+      intl,
+      value,
+      subValue,
+    } = this.props
+
+    return (
+      <div className={[_s.default, _s.px15, _s.py5, _s.mb5, _s.flexRow].join(' ')}>
+        <Text color='secondary' size='small'>
+          {intl.formatMessage(messages.sortBy)}
+        </Text>
+        <Button
+          isText
+          backgroundColor='none'
+          color='secondary'
+          className={_s.ml5}
+          buttonRef={this.setValueBtnRef}
+          onClick={this.handleOnClickValue}
+        >
+          <Text color='inherit' weight='medium' size='small'>
+            {value}
+          </Text>
+        </Button>
+
+        {
+          !!subValue &&
+          <Fragment>
+            <DotTextSeperator />
+
+            <Button
+              isText
+              backgroundColor='none'
+              color='secondary'
+              className={_s.ml5}
+              buttonRef={this.setSubValueBtnRef}
+              onClick={this.handleOnClickSubValue}
+            >
+              <Text color='inherit' weight='medium' size='small'>
+                {subValue}
+              </Text>
+            </Button>
+          </Fragment>
+        }
+      </div>
+    )
+  }
+
+}