index.js 3.7 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", { value: true });
  3. const core_1 = require("@inquirer/core");
  4. function isStepOf(value, step, min) {
  5. const valuePow = value * Math.pow(10, 6);
  6. const stepPow = step * Math.pow(10, 6);
  7. const minPow = min * Math.pow(10, 6);
  8. return (valuePow - (Number.isFinite(min) ? minPow : 0)) % stepPow === 0;
  9. }
  10. function validateNumber(value, { min, max, step, }) {
  11. if (value == null || Number.isNaN(value)) {
  12. return false;
  13. }
  14. else if (value < min || value > max) {
  15. return `Value must be between ${min} and ${max}`;
  16. }
  17. else if (step !== 'any' && !isStepOf(value, step, min)) {
  18. return `Value must be a multiple of ${step}${Number.isFinite(min) ? ` starting from ${min}` : ''}`;
  19. }
  20. return true;
  21. }
  22. exports.default = (0, core_1.createPrompt)((config, done) => {
  23. const { validate = () => true, min = -Infinity, max = Infinity, step = 1, required = false, } = config;
  24. const theme = (0, core_1.makeTheme)(config.theme);
  25. const [status, setStatus] = (0, core_1.useState)('idle');
  26. const [value, setValue] = (0, core_1.useState)(''); // store the input value as string and convert to number on "Enter"
  27. // Ignore default if not valid.
  28. const validDefault = validateNumber(config.default, { min, max, step }) === true
  29. ? config.default?.toString()
  30. : undefined;
  31. const [defaultValue = '', setDefaultValue] = (0, core_1.useState)(validDefault);
  32. const [errorMsg, setError] = (0, core_1.useState)();
  33. const prefix = (0, core_1.usePrefix)({ status, theme });
  34. (0, core_1.useKeypress)(async (key, rl) => {
  35. // Ignore keypress while our prompt is doing other processing.
  36. if (status !== 'idle') {
  37. return;
  38. }
  39. if ((0, core_1.isEnterKey)(key)) {
  40. const input = value || defaultValue;
  41. const answer = input === '' ? undefined : Number(input);
  42. setStatus('loading');
  43. let isValid = true;
  44. if (required || answer != null) {
  45. isValid = validateNumber(answer, { min, max, step });
  46. }
  47. if (isValid === true) {
  48. isValid = await validate(answer);
  49. }
  50. if (isValid === true) {
  51. setValue(String(answer ?? ''));
  52. setStatus('done');
  53. done(answer);
  54. }
  55. else {
  56. // Reset the readline line value to the previous value. On line event, the value
  57. // get cleared, forcing the user to re-enter the value instead of fixing it.
  58. rl.write(value);
  59. setError(isValid || 'You must provide a valid numeric value');
  60. setStatus('idle');
  61. }
  62. }
  63. else if ((0, core_1.isBackspaceKey)(key) && !value) {
  64. setDefaultValue(undefined);
  65. }
  66. else if (key.name === 'tab' && !value) {
  67. setDefaultValue(undefined);
  68. rl.clearLine(0); // Remove the tab character.
  69. rl.write(defaultValue);
  70. setValue(defaultValue);
  71. }
  72. else {
  73. setValue(rl.line);
  74. setError(undefined);
  75. }
  76. });
  77. const message = theme.style.message(config.message, status);
  78. let formattedValue = value;
  79. if (status === 'done') {
  80. formattedValue = theme.style.answer(value);
  81. }
  82. let defaultStr;
  83. if (defaultValue && status !== 'done' && !value) {
  84. defaultStr = theme.style.defaultAnswer(defaultValue);
  85. }
  86. let error = '';
  87. if (errorMsg) {
  88. error = theme.style.error(errorMsg);
  89. }
  90. return [
  91. [prefix, message, defaultStr, formattedValue]
  92. .filter((v) => v !== undefined)
  93. .join(' '),
  94. error,
  95. ];
  96. });