make VariablesInput detect whether value is JSON or YAML on init

awx/ui_next/src/components/CodeMirrorInput/VariablesInput.jsx

@@ -3,7 +3,7 @@ import { string, func, bool, number } from 'prop-types';
 import { Button, Split, SplitItem } from '@patternfly/react-core';
 import styled from 'styled-components';
 import ButtonGroup from '@components/ButtonGroup';
-import { yamlToJson, jsonToYaml } from '@util/yaml';
+import { yamlToJson, jsonToYaml, isJson } from '@util/yaml';
 import CodeMirrorInput from './CodeMirrorInput';
 
 const YAML_MODE = 'yaml';
@@ -15,8 +15,19 @@ const SmallButton = styled(Button)`
 `;
 
 function VariablesInput (props) {
-  const { id, label, value, readOnly, rows, error, onChange, onError, className } = props;
-  const [mode, setMode] = useState(YAML_MODE);
+  const { id, label, readOnly, rows, error, onError, className } = props;
+  // eslint-disable-next-line react/destructuring-assignment
+  const [value, setValue] = useState(props.value);
+  const [mode, setMode] = useState(isJson(value) ? JSON_MODE : YAML_MODE);
+  // eslint-disable-next-line react/destructuring-assignment
+  const isControlled = !!props.onChange;
+
+  const onChange = (newValue) => {
+    if (isControlled) {
+      props.onChange(newValue);
+    }
+    setValue(newValue);
+  };
 
   return (
     <div className={`pf-c-form__group ${className || ''}`}>
@@ -88,7 +99,7 @@ VariablesInput.propTypes = {
 };
 VariablesInput.defaultProps = {
   readOnly: false,
-  onChange: () => {},
+  onChange: null,
   rows: 6,
   error: null,
   onError: () => {},

awx/ui_next/src/util/strings.js

@@ -14,9 +14,13 @@ export function ucFirst(str) {
   return `${str[0].toUpperCase()}${str.substr(1)}`;
 }
 
-export const toTitleCase = string =>
-  string
+export const toTitleCase = string => {
+  if (!string) {
+    return '';
+  }
+  return string
     .toLowerCase()
     .split('_')
     .map(word => word.charAt(0).toUpperCase() + word.slice(1))
     .join(' ');
+};

awx/ui_next/src/util/strings.test.js

@@ -1,4 +1,4 @@
-import { pluralize, getArticle, ucFirst } from './strings';
+import { pluralize, getArticle, ucFirst, toTitleCase } from './strings';
 
 describe('string utils', () => {
   describe('pluralize', () => {
@@ -31,4 +31,14 @@ describe('string utils', () => {
       expect(ucFirst('team')).toEqual('Team');
     });
   });
+
+  describe('toTitleCase', () => {
+    test('should upper case each word', () => {
+      expect(toTitleCase('a_string_of_words')).toEqual('A String Of Words');
+    });
+
+    test('should return empty string for undefined', () => {
+      expect(toTitleCase(undefined)).toEqual('');
+    });
+  });
 });

awx/ui_next/src/util/yaml.js

@@ -21,3 +21,15 @@ export function jsonToYaml(jsonString) {
   }
   return yaml.safeDump(value);
 }
+
+export function isJson (jsonString) {
+  if (typeof jsonString !== 'string') { return false; }
+  let value;
+  try {
+    value = JSON.parse(jsonString);
+  } catch (e) {
+    return false;
+  }
+
+  return typeof value === 'object' && value !== null;
+}