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81 lines
2.0 KiB
81 lines
2.0 KiB
import {infer as inferUtil} from '../../util'
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import {ValidationResult} from './types'
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/** Attempt to infer the native type of a string value. */
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function infer(fieldName: string, inputValue: unknown): ValidationResult {
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return {
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valid: true,
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castValue: typeof inputValue === 'string' ? inferUtil(inputValue) : inputValue,
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}
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}
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/**
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* Casts the input value to a boolean.
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* Note that this assumes the value may be boolish. The strings "true", "True",
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* "TRUE", and "1" evaluate to `true`, while "false", "False", "FALSE", and "0"
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* evaluate to `false`.
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* @param fieldName
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* @param inputValue
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*/
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function boolean(fieldName: string, inputValue: unknown): ValidationResult {
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let castValue = Boolean(inputValue)
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if ( ['true', 'True', 'TRUE', '1'].includes(String(inputValue)) ) {
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castValue = true
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}
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if ( ['false', 'False', 'FALSE', '0'].includes(String(inputValue)) ) {
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castValue = false
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}
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return {
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valid: true,
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castValue,
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}
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}
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/** Casts the input value to a string. */
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function string(fieldName: string, inputValue: unknown): ValidationResult {
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return {
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valid: true,
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castValue: String(inputValue),
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}
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}
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/** Casts the input value to a number, if it is numerical. Fails otherwise. */
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function numeric(fieldName: string, inputValue: unknown): ValidationResult {
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if ( !isNaN(parseFloat(String(inputValue))) ) {
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return {
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valid: true,
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castValue: parseFloat(String(inputValue)),
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}
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}
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return {
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valid: false,
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message: 'must be numeric',
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}
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}
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/** Casts the input value to an integer. Fails otherwise. */
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function integer(fieldName: string, inputValue: unknown): ValidationResult {
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if ( !isNaN(parseInt(String(inputValue), 10)) ) {
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return {
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valid: true,
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castValue: parseInt(String(inputValue), 10),
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}
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}
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return {
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valid: false,
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message: 'must be an integer',
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}
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}
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export const Cast = {
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infer,
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boolean,
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string,
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numeric,
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integer,
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}
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