range.js
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import * as util from '../util';
/**
* Rule for validating minimum and maximum allowed values.
*
* @param rule The validation rule.
* @param value The value of the field on the source object.
* @param source The source object being validated.
* @param errors An array of errors that this rule may add
* validation errors to.
* @param options The validation options.
* @param options.messages The validation messages.
*/
function range(rule, value, source, errors, options) {
var len = typeof rule.len === 'number';
var min = typeof rule.min === 'number';
var max = typeof rule.max === 'number';
// 正则匹配码点范围从U+010000一直到U+10FFFF的文字（补充平面Supplementary Plane）
var spRegexp = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
var val = value;
var key = null;
var num = typeof value === 'number';
var str = typeof value === 'string';
var arr = Array.isArray(value);
if (num) {
key = 'number';
} else if (str) {
key = 'string';
} else if (arr) {
key = 'array';
}
// if the value is not of a supported type for range validation
// the validation rule rule should use the
// type property to also test for a particular type
if (!key) {
return false;
}
if (arr) {
val = value.length;
}
if (str) {
// 处理码点大于U+010000的文字length属性不准确的bug，如"𠮷𠮷𠮷".lenght !== 3
val = value.replace(spRegexp, '_').length;
}
if (len) {
if (val !== rule.len) {
errors.push(util.format(options.messages[key].len, rule.fullField, rule.len));
}
} else if (min && !max && val < rule.min) {
errors.push(util.format(options.messages[key].min, rule.fullField, rule.min));
} else if (max && !min && val > rule.max) {
errors.push(util.format(options.messages[key].max, rule.fullField, rule.max));
} else if (min && max && (val < rule.min || val > rule.max)) {
errors.push(util.format(options.messages[key].range, rule.fullField, rule.min, rule.max));
}
}
export default range;