class-validator
Version:
Decorator-based property validation for classes.
36 lines • 2.25 kB
JavaScript
import { buildMessage, ValidateBy } from '../common/ValidateBy';
import isLengthValidator from 'validator/lib/isLength';
export var IS_LENGTH = 'isLength';
/**
* Checks if the string's length falls in a range. Note: this function takes into account surrogate pairs.
* If given value is not a string, then it returns false.
*/
export function length(value, min, max) {
return typeof value === 'string' && isLengthValidator(value, { min: min, max: max });
}
/**
* Checks if the string's length falls in a range. Note: this function takes into account surrogate pairs.
* If given value is not a string, then it returns false.
*/
export function Length(min, max, validationOptions) {
return ValidateBy({
name: IS_LENGTH,
constraints: [min, max],
validator: {
validate: function (value, args) { return length(value, args === null || args === void 0 ? void 0 : args.constraints[0], args === null || args === void 0 ? void 0 : args.constraints[1]); },
defaultMessage: buildMessage(function (eachPrefix, args) {
var isMinLength = (args === null || args === void 0 ? void 0 : args.constraints[0]) !== null && (args === null || args === void 0 ? void 0 : args.constraints[0]) !== undefined;
var isMaxLength = (args === null || args === void 0 ? void 0 : args.constraints[1]) !== null && (args === null || args === void 0 ? void 0 : args.constraints[1]) !== undefined;
if (isMinLength && (!args.value || args.value.length < (args === null || args === void 0 ? void 0 : args.constraints[0]))) {
return eachPrefix + '$property must be longer than or equal to $constraint1 characters';
}
else if (isMaxLength && args.value.length > (args === null || args === void 0 ? void 0 : args.constraints[1])) {
return eachPrefix + '$property must be shorter than or equal to $constraint2 characters';
}
return (eachPrefix +
'$property must be longer than or equal to $constraint1 and shorter than or equal to $constraint2 characters');
}, validationOptions),
},
}, validationOptions);
}
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