Huauauaa/cheat-sheet#83

src/util/__tests__/case.test.js

@@ -0,0 +1,39 @@
+import { toCamel } from '../case';
+
+test('toCamel', () => {
+  expect(toCamel(null)).toBe(null);
+  expect(toCamel(undefined)).toBe(undefined);
+  expect(toCamel(1)).toBe(1);
+  expect(toCamel(0)).toBe(0);
+  expect(toCamel('first_name')).toBe('firstName');
+  expect(toCamel(true)).toBe(true);
+  expect(toCamel(true)).toBe(true);
+  expect(toCamel([])).toStrictEqual([]);
+  expect(toCamel({})).toStrictEqual({});
+  expect(toCamel({ firstName: null })).toStrictEqual({
+    firstName: null,
+  });
+  expect(toCamel({ firstName: undefined })).toStrictEqual({
+    firstName: undefined,
+  });
+  expect(toCamel({ firstName: 'Harvey' })).toStrictEqual({
+    firstName: 'Harvey',
+  });
+  expect(toCamel({ first_name: 'Harvey' })).toStrictEqual({
+    firstName: 'Harvey',
+  });
+  expect(toCamel({ First_Name: 'Harvey' })).toStrictEqual({
+    firstName: 'Harvey',
+  });
+  expect(toCamel([{ first_name: 'Harvey' }])).toStrictEqual([
+    {
+      firstName: 'Harvey',
+    },
+  ]);
+  expect(
+    toCamel({ first_name: 'Harvey', favorite_thing: ['reading'] }),
+  ).toStrictEqual({
+    firstName: 'Harvey',
+    favoriteThing: ['reading'],
+  });
+});

src/util/case.js

@@ -0,0 +1,27 @@
+import _ from 'lodash';
+
+function camelCase(str) {
+  return _.camelCase(str);
+  // return str.replace(/_([a-z])/g, (p, m) => m.toUpperCase());
+}
+
+export function toCamel(data) {
+  if (typeof data === 'string') {
+    return camelCase(data);
+  }
+  if (typeof data !== 'object' || !data) {
+    return data;
+  }
+  if (Array.isArray(data)) {
+    return data.map((item) => toCamel(item));
+  }
+
+  return Object.keys(data).reduce((res, key) => {
+    let value = data[key];
+    if (typeof value === 'object') {
+      value = toCamel(value);
+    }
+    res[camelCase(key)] = value;
+    return res;
+  }, {});
+}