device_home/node_modules/camelcase/index.js

   1 'use strict';
   2
   3 const preserveCamelCase = string => {
   4         let isLastCharLower = false;
   5         let isLastCharUpper = false;
   6         let isLastLastCharUpper = false;
   7
   8         for (let i = 0; i < string.length; i++) {
   9                 const character = string[i];
  10
  11                 if (isLastCharLower && /[a-zA-Z]/.test(character) && character.toUpperCase() === character) {
  12                         string = string.slice(0, i) + '-' + string.slice(i);
  13                         isLastCharLower = false;
  14                         isLastLastCharUpper = isLastCharUpper;
  15                         isLastCharUpper = true;
  16                         i++;
  17                 } else if (isLastCharUpper && isLastLastCharUpper && /[a-zA-Z]/.test(character) && character.toLowerCase() === character) {
  18                         string = string.slice(0, i - 1) + '-' + string.slice(i - 1);
  19                         isLastLastCharUpper = isLastCharUpper;
  20                         isLastCharUpper = false;
  21                         isLastCharLower = true;
  22                 } else {
  23                         isLastCharLower = character.toLowerCase() === character && character.toUpperCase() !== character;
  24                         isLastLastCharUpper = isLastCharUpper;
  25                         isLastCharUpper = character.toUpperCase() === character && character.toLowerCase() !== character;
  26                 }
  27         }
  28
  29         return string;
  30 };
  31
  32 const camelCase = (input, options) => {
  33         if (!(typeof input === 'string' || Array.isArray(input))) {
  34                 throw new TypeError('Expected the input to be `string | string[]`');
  35         }
  36
  37         options = Object.assign({
  38                 pascalCase: false
  39         }, options);
  40
  41         const postProcess = x => options.pascalCase ? x.charAt(0).toUpperCase() + x.slice(1) : x;
  42
  43         if (Array.isArray(input)) {
  44                 input = input.map(x => x.trim())
  45                         .filter(x => x.length)
  46                         .join('-');
  47         } else {
  48                 input = input.trim();
  49         }
  50
  51         if (input.length === 0) {
  52                 return '';
  53         }
  54
  55         if (input.length === 1) {
  56                 return options.pascalCase ? input.toUpperCase() : input.toLowerCase();
  57         }
  58
  59         const hasUpperCase = input !== input.toLowerCase();
  60
  61         if (hasUpperCase) {
  62                 input = preserveCamelCase(input);
  63         }
  64
  65         input = input
  66                 .replace(/^[_.\- ]+/, '')
  67                 .toLowerCase()
  68                 .replace(/[_.\- ]+(\w|$)/g, (_, p1) => p1.toUpperCase())
  69                 .replace(/\d+(\w|$)/g, m => m.toUpperCase());
  70
  71         return postProcess(input);
  72 };
  73
  74 module.exports = camelCase;
  75 // TODO: Remove this for the next major release
  76 module.exports.default = camelCase;