@samitouri / QOS-React / commits / bfd1531eca

Add a gulp script for extracting error codes (#6882)

Keyan Zhang committed Jun 1, 2016 at 11:21 UTC bfd1531eca38e4e25a9517a00d5be1283bda6696

10 files changed +437 -1

.travis.yml

@@ -81,6 +81,7 @@ script:

81 >> src/renderers/dom/shared/ReactDOMFeatureFlags.js

82 ./node_modules/.bin/grunt jest:normal

83 git checkout -- src/renderers/dom/shared/ReactDOMFeatureFlags.js

84 + ./node_modules/.bin/gulp react:extract-errors

85 else

86 ./node_modules/.bin/grunt $TEST_TYPE

87 fi

gulpfile.js

+12 -1

@@ -15,6 +15,7 @@ var flatten = require('gulp-flatten');

15 var del = require('del');

17 var babelPluginModules = require('fbjs-scripts/babel-6/rewrite-modules');

18 +var extractErrors = require('./scripts/error-codes/gulp-extract-errors');

20 var paths = {

21 react: {

@@ -46,9 +47,13 @@ var moduleMap = Object.assign(

47 }

48 );

50 +var errorCodeOpts = {

51 + errorMapFilePath: 'scripts/error-codes/codes.json',

52 +};

53 +

54 var babelOpts = {

55 plugins: [

51 - [babelPluginModules, { map: moduleMap }],

56 + [babelPluginModules, {map: moduleMap}],

57 ],

58 };

@@ -64,4 +69,10 @@ gulp.task('react:modules', function() {

69 .pipe(gulp.dest(paths.react.lib));

70 });

72 +gulp.task('react:extract-errors', function() {

73 + return gulp

74 + .src(paths.react.src)

75 + .pipe(extractErrors(errorCodeOpts));

76 +});

77 +

78 gulp.task('default', ['react:modules']);

package.json

@@ -29,6 +29,8 @@

29 "babel-plugin-transform-object-rest-spread": "^6.6.5",

30 "babel-plugin-transform-react-jsx-source": "^6.8.0",

31 "babel-preset-react": "^6.5.0",

32 + "babel-traverse": "^6.9.0",

33 + "babylon": "^6.8.0",

34 "browserify": "^13.0.0",

35 "bundle-collapser": "^1.1.1",

36 "coffee-script": "^1.8.0",

@@ -51,6 +53,7 @@

53 "gulp": "^3.9.0",

54 "gulp-babel": "^6.0.0",

55 "gulp-flatten": "^0.2.0",

56 + "gulp-util": "^3.0.7",

57 "gzip-js": "~0.3.2",

58 "jest": "^12.1.1",

59 "loose-envify": "^1.1.0",

@@ -95,6 +98,7 @@

98 "testPathDirs": [

99 "<rootDir>/eslint-rules",

100 "<rootDir>/mocks",

101 + "<rootDir>/scripts",

102 "<rootDir>/src",

103 "node_modules/fbjs"

104 ],

scripts/error-codes/Types.js new

+13

@@ -0,0 +1,13 @@

1 +/**

4 + *

5 + * This source code is licensed under the BSD-style license found in the

6 + * LICENSE file in the root directory of this source tree. An additional grant

7 + * of patent rights can be found in the PATENTS file in the same directory.

8 + *

9 + * @flow

10 + */

11 +'use strict';

12 +

13 +/*:: export type ErrorMap = { [id: string]: string; }; */

scripts/error-codes/__tests__/evalToString-test.js new

+36

@@ -0,0 +1,36 @@

1 +/**

4 + *

5 + * This source code is licensed under the BSD-style license found in the

6 + * LICENSE file in the root directory of this source tree. An additional grant

7 + * of patent rights can be found in the PATENTS file in the same directory.

8 + */

9 +'use strict';

10 +

11 +var evalToString = require('../evalToString');

12 +var babylon = require('babylon');

13 +

14 +var parse = (source) => babylon.parse(

15 + `(${source});`

16 +).program.body[0].expression; // quick way to get an exp node

17 +

18 +var parseAndEval = (source) => evalToString(parse(source));

19 +

20 +describe('evalToString', () => {

21 + it('should support StringLiteral', () => {

22 + expect(parseAndEval(`'foobar'`)).toBe('foobar');

23 + expect(parseAndEval(`'yowassup'`)).toBe('yowassup');

24 + });

25 +

26 + it('should support string concat (`+`)', () => {

27 + expect(parseAndEval(`'foo ' + 'bar'`)).toBe('foo bar');

28 + });

29 +

30 + it('should throw when it finds other types', () => {

31 + expect(() => parseAndEval(`'foo ' + true`)).toThrowError(/Unsupported type/);

32 + expect(() => parseAndEval(`'foo ' + 3`)).toThrowError(/Unsupported type/);

33 + expect(() => parseAndEval(`'foo ' + null`)).toThrowError(/Unsupported type/);

34 + expect(() => parseAndEval(`'foo ' + undefined`)).toThrowError(/Unsupported type/);

35 + });

36 +});

scripts/error-codes/__tests__/invertObject-test.js new

+54

@@ -0,0 +1,54 @@

1 +/**

4 + *

5 + * This source code is licensed under the BSD-style license found in the

6 + * LICENSE file in the root directory of this source tree. An additional grant

7 + * of patent rights can be found in the PATENTS file in the same directory.

8 + */

9 +'use strict';

10 +

11 +var invertObject = require('../invertObject');

12 +

13 +var objectValues = (target) => Object.keys(target).map((key) => target[key]);

14 +

15 +describe('invertObject', () => {

16 + it('should return an empty object for an empty input', () => {

17 + expect(invertObject({})).toEqual({});

18 + });

19 +

20 + it('should invert key-values', () => {

21 + expect(invertObject({

22 + a: '3',

23 + b: '4',

24 + })).toEqual({

25 + 3: 'a',

26 + 4: 'b',

27 + });

28 + });

29 +

30 + it('should take the last value when there\'re duplications in vals', () => {

31 + expect(invertObject({

32 + a: '3',

33 + b: '4',

34 + c: '3',

35 + })).toEqual({

36 + 4: 'b',

37 + 3: 'c',

38 + });

39 + });

40 +

41 + it('should perserve the original order', () => {

42 + expect(Object.keys(invertObject({

43 + a: '3',

44 + b: '4',

45 + c: '3',

46 + }))).toEqual(['3', '4']);

47 +

48 + expect(objectValues(invertObject({

49 + a: '3',

50 + b: '4',

51 + c: '3',

52 + }))).toEqual(['c', 'b']);

53 + });

54 +});

scripts/error-codes/codes.json new

+138

@@ -0,0 +1,138 @@

1 +{

2 + "0": "React.addons.createFragment(...): Encountered an invalid child; DOM elements are not valid children of React components.",

3 + "1": "update(): expected target of %s to be an array; got %s.",

4 + "2": "update(): expected spec of %s to be an array; got %s. Did you forget to wrap your parameter in an array?",

5 + "3": "update(): You provided a key path to update() that did not contain one of %s. Did you forget to include {%s: ...}?",

6 + "4": "Cannot have more than one key in an object with %s",

7 + "5": "update(): %s expects a spec of type 'object'; got %s",

8 + "6": "update(): %s expects a target of type 'object'; got %s",

9 + "7": "Expected %s target to be an array; got %s",

10 + "8": "update(): expected spec of %s to be an array of arrays; got %s. Did you forget to wrap your parameters in an array?",

11 + "9": "update(): expected spec of %s to be a function; got %s.",

12 + "10": "findAllInRenderedTree(...): instance must be a composite component",

13 + "11": "TestUtils.scryRenderedDOMComponentsWithClass expects a className as a second argument.",

14 + "12": "ReactShallowRenderer render(): Invalid component element.%s",

15 + "13": "ReactShallowRenderer render(): Shallow rendering works only with custom components, not primitives (%s). Instead of calling `.render(el)` and inspecting the rendered output, look at `el.props` directly instead.",

16 + "14": "TestUtils.Simulate expects a component instance and not a ReactElement.TestUtils.Simulate will not work if you are using shallow rendering.",

17 + "15": "reactComponentExpect(...): instance must be a composite component",

18 + "16": "Do not override existing functions.",

19 + "17": "All native instances should have a tag.",

20 + "18": "Expected a component class, got %s.%s",

21 + "19": "Expect a native root tag, instead got %s",

22 + "20": "RawText \"%s\" must be wrapped in an explicit <Text> component.",

23 + "21": "findNodeHandle(...): Argument is not a component (type: %s, keys: %s)",

24 + "22": "findNodeHandle(...): Unable to find node handle for unmounted component.",

25 + "23": "onlyChild must be passed a children with exactly one child.",

26 + "24": "Mismatched list of contexts in callback queue",

27 + "25": "Trying to release an instance into a pool of a different type.",

28 + "26": "Unexpected node: %s",

29 + "27": "Transaction.perform(...): Cannot initialize a transaction when there is already an outstanding transaction.",

30 + "28": "Transaction.closeAll(): Cannot close transaction when none are open.",

31 + "29": "accumulate(...): Accumulated items must be not be null or undefined.",

32 + "30": "accumulateInto(...): Accumulated items must not be null or undefined.",

33 + "31": "Objects are not valid as a React child (found: %s).%s",

34 + "32": "Unable to find element with ID %s.",

35 + "33": "getNodeFromInstance: Invalid argument.",

36 + "34": "React DOM tree root should always have a node reference.",

37 + "35": "isAncestor: Invalid argument.",

38 + "36": "getParentInstance: Invalid argument.",

39 + "37": "_registerComponent(...): Target container is not a DOM element.",

40 + "38": "parentComponent must be a valid React Component",

41 + "39": "ReactDOM.render(): Invalid component element.%s",

42 + "40": "unmountComponentAtNode(...): Target container is not a DOM element.",

43 + "41": "mountComponentIntoNode(...): Target container is not valid.",

44 + "42": "You're trying to render a component to the document using server rendering but the checksum was invalid. This usually means you rendered a different component type or props on the client from the one on the server, or your render() methods are impure. React cannot handle this case due to cross-browser quirks by rendering at the document root. You should look for environment dependent code in your components and ensure the props are the same client and server side:\n%s",

45 + "43": "You're trying to render a component to the document but you didn't use server rendering. We can't do this without using server rendering due to cross-browser quirks. See ReactDOMServer.renderToString() for server rendering.",

46 + "44": "findDOMNode was called on an unmounted component.",

47 + "45": "Element appears to be neither ReactComponent nor DOMNode (keys: %s)",

48 + "46": "renderToString(): You must pass a valid ReactElement.",

49 + "47": "renderToStaticMarkup(): You must pass a valid ReactElement.",

50 + "48": "injectDOMPropertyConfig(...): You're trying to inject DOM property '%s' which has already been injected. You may be accidentally injecting the same DOM property config twice, or you may be injecting two configs that have conflicting property names.",

51 + "49": "DOMProperty: Properties that have side effects must use property: %s",

52 + "50": "DOMProperty: Value can be one of boolean, overloaded boolean, or numeric value, but not a combination: %s",

53 + "51": "dangerouslyRenderMarkup(...): Cannot render markup in a worker thread. Make sure `window` and `document` are available globally before requiring React when unit testing or use ReactDOMServer.renderToString for server rendering.",

54 + "52": "dangerouslyRenderMarkup(...): Missing markup.",

55 + "53": "Danger: Assigning to an already-occupied result index.",

56 + "54": "Danger: Did not assign to every index of resultList.",

57 + "55": "Danger: Expected markup to render %s nodes, but rendered %s.",

58 + "56": "dangerouslyReplaceNodeWithMarkup(...): Cannot render markup in a worker thread. Make sure `window` and `document` are available globally before requiring React when unit testing or use ReactDOMServer.renderToString() for server rendering.",

59 + "57": "dangerouslyReplaceNodeWithMarkup(...): Missing markup.",

60 + "58": "dangerouslyReplaceNodeWithMarkup(...): Cannot replace markup of the <html> node. This is because browser quirks make this unreliable and/or slow. If you want to render to the root you must use server rendering. See ReactDOMServer.renderToString().",

61 + "59": "%s is a void element tag and must not have `children` or use `props.dangerouslySetInnerHTML`.%s",

62 + "60": "Can only set one of `children` or `props.dangerouslySetInnerHTML`.",

63 + "61": "`props.dangerouslySetInnerHTML` must be in the form `{__html: ...}`. Please visit https://fb.me/react-invariant-dangerously-set-inner-html for more information.",

64 + "62": "The `style` prop expects a mapping from style properties to values, not a string. For example, style={{marginRight: spacing + 'em'}} when using JSX.%s",

65 + "63": "Must be mounted to trap events",

66 + "64": "trapBubbledEvent(...): Requires node to be rendered.",

67 + "65": "Invalid tag: %s",

68 + "66": "<%s> tried to unmount. Because of cross-browser quirks it is impossible to unmount some top-level components (eg <html>, <head>, and <body>) reliably and efficiently. To fix this, have a single top-level component that never unmounts render these elements.",

69 + "67": "Missing closing comment for text component %s",

70 + "68": "Expected devtool events to fire for the child before its parent includes it in onSetChildren().",

71 + "69": "Expected onSetDisplayName() to fire for the child before its parent includes it in onSetChildren().",

72 + "70": "Expected onSetChildren() or onSetText() to fire for the child before its parent includes it in onSetChildren().",

73 + "71": "Expected onMountComponent() to fire for the child before its parent includes it in onSetChildren().",

74 + "72": "Expected onSetParent() and onSetChildren() to be consistent (%s has parents %s and %s).",

75 + "73": "ReactClassInterface: You are attempting to override `%s` from your class specification. Ensure that your method names do not overlap with React methods.",

76 + "74": "ReactClassInterface: You are attempting to define `%s` on your component more than once. This conflict may be due to a mixin.",

77 + "75": "ReactClass: You're attempting to use a component class or function as a mixin. Instead, just use a regular object.",

78 + "76": "ReactClass: You're attempting to use a component as a mixin. Instead, just use a regular object.",

79 + "77": "ReactClass: Unexpected spec policy %s for key %s when mixing in component specs.",

80 + "78": "ReactClass: You are attempting to define a reserved property, `%s`, that shouldn't be on the \"statics\" key. Define it as an instance property instead; it will still be accessible on the constructor.",

81 + "79": "ReactClass: You are attempting to define `%s` on your component more than once. This conflict may be due to a mixin.",

82 + "80": "mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.",

83 + "81": "mergeIntoWithNoDuplicateKeys(): Tried to merge two objects with the same key: `%s`. This conflict may be due to a mixin; in particular, this may be caused by two getInitialState() or getDefaultProps() methods returning objects with clashing keys.",

84 + "82": "%s.getInitialState(): must return an object or null",

85 + "83": "createClass(...): Class specification must implement a `render` method.",

86 + "84": "%s: %s type `%s` is invalid; it must be a function, usually from React.PropTypes.",

87 + "85": "setState(...): takes an object of state variables to update or a function which returns an object of state variables.",

88 + "86": "SimpleEventPlugin: Unhandled event type, `%s`.",

89 + "87": "Cannot provide a checkedLink and a valueLink. If you want to use checkedLink, you probably don't want to use valueLink and vice versa.",

90 + "88": "Cannot provide a valueLink and a value or onChange event. If you want to use value or onChange, you probably don't want to use valueLink.",

91 + "89": "Cannot provide a checkedLink and a checked property or onChange event. If you want to use checked or onChange, you probably don't want to use checkedLink",

92 + "90": "ReactDOMInput: Mixing React and non-React radio inputs with the same `name` is not supported.",

93 + "91": "`dangerouslySetInnerHTML` does not make sense on <textarea>.",

94 + "92": "If you supply `defaultValue` on a <textarea>, do not pass children.",

95 + "93": "<textarea> can only have at most one child.",

96 + "94": "Expected %s listener to be a function, instead got type %s",

97 + "95": "processEventQueue(): Additional events were enqueued while processing an event queue. Support for this has not yet been implemented.",

98 + "96": "EventPluginRegistry: Cannot inject event plugins that do not exist in the plugin ordering, `%s`.",

99 + "97": "EventPluginRegistry: Event plugins must implement an `extractEvents` method, but `%s` does not.",

100 + "98": "EventPluginRegistry: Failed to publish event `%s` for plugin `%s`.",

101 + "99": "EventPluginHub: More than one plugin attempted to publish the same event name, `%s`.",

102 + "100": "EventPluginHub: More than one plugin attempted to publish the same registration name, `%s`.",

103 + "101": "EventPluginRegistry: Cannot inject event plugin ordering more than once. You are likely trying to load more than one copy of React.",

104 + "102": "EventPluginRegistry: Cannot inject two different event plugins using the same name, `%s`.",

105 + "103": "executeDirectDispatch(...): Invalid `event`.",

106 + "104": "ReactCompositeComponent: injectEnvironment() can only be called once.",

107 + "105": "%s(...): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.",

108 + "106": "%s.state: must be set to an object or null",

109 + "107": "%s.getChildContext(): childContextTypes must be defined in order to use getChildContext().",

110 + "108": "%s.getChildContext(): key \"%s\" is not defined in childContextTypes.",

111 + "109": "%s.render(): A valid React element (or null) must be returned. You may have returned undefined, an array or some other invalid object.",

112 + "110": "Stateless function components cannot have refs.",

113 + "111": "There is no registered component for the tag %s",

114 + "112": "getNextDescendantID(%s, %s): Received an invalid React DOM ID.",

115 + "113": "getNextDescendantID(...): React has made an invalid assumption about the DOM hierarchy. Expected `%s` to be an ancestor of `%s`.",

116 + "114": "getFirstCommonAncestorID(%s, %s): Expected a valid React DOM ID: %s",

117 + "115": "traverseParentPath(...): Cannot traverse from and to the same ID, `%s`.",

118 + "116": "traverseParentPath(%s, %s, ...): Cannot traverse from two IDs that do not have a parent path.",

119 + "117": "traverseParentPath(%s, %s, ...): Detected an infinite loop while traversing the React DOM ID tree. This may be due to malformed IDs: %s",

120 + "118": "updateTextContent called on non-empty component.",

121 + "119": "addComponentAsRefTo(...): Only a ReactOwner can have refs. You might be adding a ref to a component that was not created inside a component's `render` method, or you have multiple copies of React loaded (details: https://fb.me/react-refs-must-have-owner).",

122 + "120": "removeComponentAsRefFrom(...): Only a ReactOwner can have refs. You might be removing a ref to a component that was not created inside a component's `render` method, or you have multiple copies of React loaded (details: https://fb.me/react-refs-must-have-owner).",

123 + "121": "performUpdateIfNecessary: Unexpected batch number (current %s, pending %s)",

124 + "122": "%s(...): Expected the last optional `callback` argument to be a function. Instead received: %s.",

125 + "123": "ReactUpdates: must inject a reconcile transaction class and batching strategy",

126 + "124": "Expected flush transaction's stored dirty-components length (%s) to match dirty-components array length (%s).",

127 + "125": "ReactUpdates.asap: Can't enqueue an asap callback in a context whereupdates are not being batched.",

128 + "126": "ReactUpdates: must provide a reconcile transaction class",

129 + "127": "ReactUpdates: must provide a batching strategy",

130 + "128": "ReactUpdates: must provide a batchedUpdates() function",

131 + "129": "ReactUpdates: must provide an isBatchingUpdates boolean attribute",

132 + "130": "Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: %s.%s",

133 + "131": "Encountered invalid React node of type %s",

134 + "132": "Ended a touch event which was not counted in trackedTouchCount.",

135 + "133": "Touch object is missing identifier",

136 + "134": "Touch data should have been recorded on start",

137 + "135": "Cannot find single active touch"

138 +}

scripts/error-codes/evalToString.js new

+27

@@ -0,0 +1,27 @@

1 +/**

4 + *

5 + * This source code is licensed under the BSD-style license found in the

6 + * LICENSE file in the root directory of this source tree. An additional grant

7 + * of patent rights can be found in the PATENTS file in the same directory.

8 + *

9 + * @flow

10 + */

11 +'use strict';

12 +

13 +function evalToString(ast/* : Object */)/* : string */ {

14 + switch (ast.type) {

15 + case 'StringLiteral':

16 + return ast.value;

17 + case 'BinaryExpression': // `+`

18 + if (ast.operator !== '+') {

19 + throw new Error('Unsupported binary operator ' + ast.operator);

20 + }

21 + return evalToString(ast.left) + evalToString(ast.right);

22 + default:

23 + throw new Error('Unsupported type ' + ast.type);

24 + }

25 +}

26 +

27 +module.exports = evalToString;

scripts/error-codes/gulp-extract-errors.js new

+117

@@ -0,0 +1,117 @@

1 +/**

4 + *

5 + * This source code is licensed under the BSD-style license found in the

6 + * LICENSE file in the root directory of this source tree. An additional grant

7 + * of patent rights can be found in the PATENTS file in the same directory.

8 + */

9 +'use strict';

10 +

11 +var babylon = require('babylon');

12 +var fs = require('fs');

13 +var gutil = require('gulp-util');

14 +var path = require('path');

15 +var through = require('through2');

16 +var traverse = require('babel-traverse').default;

17 +

18 +var evalToString = require('./evalToString');

19 +var invertObject = require('./invertObject');

20 +

21 +var PLUGIN_NAME = 'extract-errors';

22 +

23 +var babylonOptions = {

24 + sourceType: 'module',

25 + // As a parser, babylon has its own options and we can't directly

26 + // import/require a babel preset. It should be kept **the same** as

27 + // the `babel-plugin-syntax-*` ones specified in

28 + // https://github.com/facebook/fbjs/blob/master/babel-preset/configure.js

29 + plugins: [

30 + 'classProperties',

31 + 'flow',

32 + 'jsx',

33 + 'trailingFunctionCommas',

34 + 'objectRestSpread',

35 + ],

36 +};

37 +

38 +module.exports = function(opts) {

39 + if (!opts || !('errorMapFilePath' in opts)) {

40 + throw new gutil.PluginError(

41 + PLUGIN_NAME,

42 + 'Missing options. Ensure you pass an object with `errorMapFilePath`.'

43 + );

44 + }

45 +

46 + var errorMapFilePath = opts.errorMapFilePath;

47 + var existingErrorMap;

48 + try {

49 + existingErrorMap = require(

50 + path.join(__dirname, path.basename(errorMapFilePath))

51 + );

52 + } catch (e) {

53 + existingErrorMap = {};

54 + }

55 +

56 + var allErrorIDs = Object.keys(existingErrorMap);

57 + var currentID;

58 +

59 + if (allErrorIDs.length === 0) { // Map is empty

60 + currentID = 0;

61 + } else {

62 + currentID = Math.max.apply(null, allErrorIDs) + 1;

63 + }

64 +

65 + // Here we invert the map object in memory for faster error code lookup

66 + existingErrorMap = invertObject(existingErrorMap);

67 +

68 + function transform(file, enc, cb) {

69 + if (file.isNull()) {

70 + cb(null, file);

71 + return;

72 + }

73 +

74 + if (file.isStream()) {

75 + cb(new gutil.PluginError(PLUGIN_NAME, 'Streaming not supported'));

76 + return;

77 + }

78 +

79 + var source = file.contents.toString();

80 + var ast = babylon.parse(source, babylonOptions);

81 +

82 + traverse(ast, {

83 + CallExpression: {

84 + exit: function(astPath) {

85 + if (astPath.get('callee').isIdentifier({name: 'invariant'})) {

86 + var node = astPath.node;

87 +

88 + // error messages can be concatenated (`+`) at runtime, so here's a

89 + // trivial partial evaluator that interprets the literal value

90 + var errorMsgLiteral = evalToString(node.arguments[1]);

91 + if (existingErrorMap.hasOwnProperty(errorMsgLiteral)) {

92 + return;

93 + }

94 +

95 + existingErrorMap[errorMsgLiteral] = '' + (currentID++);

96 + }

97 + },

98 + },

99 + });

100 +

101 + cb();

102 + }

103 +

104 + function flush(cb) {

105 + fs.writeFile(

106 + errorMapFilePath,

107 + JSON.stringify(invertObject(existingErrorMap), null, 2) + '\n',

108 + 'utf-8',

109 + function() {

110 + // avoid calling cb with fs.write callback data

111 + cb();

112 + }

113 + );

114 + }

115 +

116 + return through.obj(transform, flush);

117 +};

scripts/error-codes/invertObject.js new

+35

@@ -0,0 +1,35 @@

1 +/**

4 + *

5 + * This source code is licensed under the BSD-style license found in the

6 + * LICENSE file in the root directory of this source tree. An additional grant

7 + * of patent rights can be found in the PATENTS file in the same directory.

8 + *

9 + * @flow

10 + */

11 +'use strict';

12 +

13 +/*:: import type { ErrorMap } from './Types' */

14 +

15 +/**

16 + * turns

17 + * { 'MUCH ERROR': '0', 'SUCH WRONG': '1' }

18 + * into

19 + * { 0: 'MUCH ERROR', 1: 'SUCH WRONG' }

20 + */

21 +function invertObject(targetObj/* : ErrorMap */)/* : ErrorMap */ {

22 + var result = {};

23 + var mapKeys = Object.keys(targetObj);

24 +

25 + for (let i = 0; i < mapKeys.length; i++) {

26 + var originalKey = mapKeys[i];

27 + var originalVal = targetObj[originalKey];

28 +

29 + result[originalVal] = originalKey;

30 + }

31 +

32 + return result;

33 +}

34 +

35 +module.exports = invertObject;