jaywalk/dist/types/string.js

Runtime type validation

"use strict";
var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var any_1 = require('./any');
var utils_1 = require('../utils');
var String = (function (_super) {
    __extends(String, _super);
    function String(options) {
        if (options === void 0) { options = {}; }
        _super.call(this, options);
        this.type = 'String';
        if (options.minLength != null) {
            this.minLength = options.minLength;
        }
        if (options.maxLength != null) {
            this.maxLength = options.maxLength;
        }
        if (options.pattern != null) {
            this.pattern = options.pattern;
        }
        this._tests.push(isString);
        this._tests.push(toPatternTest(this.pattern));
        this._tests.push(toMinLengthTest(this.minLength));
        this._tests.push(toMaxLengthTest(this.maxLength));
    }
    String.prototype._isType = function (value, path, context) {
        return utils_1.wrapIsType(this, value, path, context, _super.prototype._isType, function (value) {
            if (typeof value === 'string') {
                return 1;
            }
            throw context.error(path, 'String', 'type', 'String', value);
        });
    };
    String.prototype._extend = function (options) {
        return _super.prototype._extend.call(this, options);
    };
    return String;
}(any_1.Any));
exports.String = String;
function isString(value, path, context, next) {
    if (typeof value !== 'string') {
        throw context.error(path, 'String', 'type', 'String', value);
    }
    return next(value);
}
function toMinLengthTest(minLength) {
    if (minLength == null) {
        return utils_1.toNext;
    }
    var minLengthValue = utils_1.toValue(minLength);
    return function (value, path, context, next) {
        var minLength = minLengthValue(path, context);
        if (Buffer.byteLength(value) < minLength) {
            throw context.error(path, 'String', 'minLength', minLength, value);
        }
        return next(value);
    };
}
function toMaxLengthTest(maxLength) {
    if (maxLength == null) {
        return utils_1.toNext;
    }
    var maxLengthValue = utils_1.toValue(maxLength);
    return function (value, path, context, next) {
        var maxLength = maxLengthValue(path, context);
        if (Buffer.byteLength(value) > maxLength) {
            throw context.error(path, 'String', 'maxLength', maxLength, value);
        }
        return next(value);
    };
}
function toPatternTest(pattern) {
    if (pattern == null) {
        return utils_1.toNext;
    }
    var patternValue = utils_1.toValue(pattern);
    return function (value, path, context, next) {
        var re = new RegExp(patternValue(path, context));
        if (!re.test(value)) {
            throw context.error(path, 'String', 'pattern', pattern, value);
        }
        return next(value);
    };
}
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