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33 lines
1.2 KiB
33 lines
1.2 KiB
import * as util from '../util'; |
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/** |
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* Rule for validating a regular expression pattern. |
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* |
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* @param rule The validation rule. |
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* @param value The value of the field on the source object. |
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* @param source The source object being validated. |
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* @param errors An array of errors that this rule may add |
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* validation errors to. |
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* @param options The validation options. |
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* @param options.messages The validation messages. |
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*/ |
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function pattern(rule, value, source, errors, options) { |
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if (rule.pattern) { |
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if (rule.pattern instanceof RegExp) { |
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// if a RegExp instance is passed, reset `lastIndex` in case its `global` |
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// flag is accidentally set to `true`, which in a validation scenario |
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// is not necessary and the result might be misleading |
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rule.pattern.lastIndex = 0; |
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if (!rule.pattern.test(value)) { |
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errors.push(util.format(options.messages.pattern.mismatch, rule.fullField, value, rule.pattern)); |
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} |
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} else if (typeof rule.pattern === 'string') { |
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var _pattern = new RegExp(rule.pattern); |
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if (!_pattern.test(value)) { |
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errors.push(util.format(options.messages.pattern.mismatch, rule.fullField, value, rule.pattern)); |
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} |
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} |
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} |
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} |
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export default pattern; |