390 lines
11 KiB
JavaScript
390 lines
11 KiB
JavaScript
/*!
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* random-ext
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* https://github.com/bkumar2/random-ext.git
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*
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* Copyright 2014 Bipul Kumar
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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function _array(length, elementFunction, args) {
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var array = [];
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if (length != null) {
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for (var i = 0; i < length; ++i) {
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array[i] = elementFunction.apply(this, args);
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}
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} else {
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throw "length is required.";
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}
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return array;
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}
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function boolean() {
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return Math.random() < 0.5;
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}
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function booleanArray(length) {
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return _array(length, boolean);
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}
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function float(limit, min) {
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if (limit != null) {
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if (min != null) {
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return Math.random() * (limit - min) + min;
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} else {
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return Math.random() * limit;
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}
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} else {
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throw "max is required.";
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}
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}
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function floatArray(length, limit, min) {
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return _array(length, float, [limit, min]);
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}
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function integer(max, min) {
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if (max != null) {
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if (min != null) {
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if (max < min) {
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throw "max [" + max + "] is less than min [" + min + "]";
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}
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return Math.floor(Math.random() * (max - min + 1)) + min;
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} else {
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return Math.floor(Math.random() * (max + 1));
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}
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} else {
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throw "max is required.";
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}
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}
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function integerArray(length, max, min) {
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return _array(length, integer, [max, min]);
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}
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function _normalizeRanges(ranges) {
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if (randomExt.DEBUG) {
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console.log("Normalizing ranges:", ranges);
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}
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ranges.sort(function (a, b) {
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return a[0] - b[0];
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});
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if (randomExt.DEBUG) {
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console.log("sorted ranges:", ranges);
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}
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for (var i = 0; i < ranges.length - 1; ++i) {
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for (var j = i + 1; j < ranges.length; ++j) {
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// remove right contained
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if (ranges[i][1] >= ranges[j][1]) {
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ranges.splice(j, 1);
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j--;
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}
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// fix overlap
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else if (ranges[i][1] >= ranges[j][0]) {
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ranges[j][0] = ranges[i][1] + 1;
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}
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if (randomExt.DEBUG) {
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console.log("iteration (" + i + "," + j + "):", ranges);
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}
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}
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}
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if (randomExt.DEBUG) {
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console.log("Normalized ranges:", ranges);
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}
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}
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function _integerFromRanges(ranges) {
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_normalizeRanges(ranges);
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if (ranges != null) {
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var span = 0;
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for (var i = 0; i < ranges.length; ++i) {
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span += ranges[i][1] - ranges[i][0] + 1;
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}
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var randomNumber = Math.floor(Math.random() * span);
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for (var i = 0; i < ranges.length; ++i) {
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randomNumber += ranges[i][0];
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if (randomNumber <= ranges[i][1]) {
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break;
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} else {
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randomNumber -= ranges[i][1] + 1;
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}
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}
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return randomNumber;
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} else {
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throw "ranges is required.";
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}
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}
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function _integerArrayFromRanges(length, ranges) {
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var numberArray = [];
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if (length != null && ranges != null) {
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for (var i = 0; i < length; ++i) {
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numberArray[i] = _integerFromRanges(ranges);
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}
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} else {
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throw "length and ranges is required.";
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}
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return numberArray;
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}
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function _stringFromRanges(maxLength, minLength, ranges) {
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var dString = "";
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var length = integer(maxLength, minLength);
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var unicodeNumbers = _integerArrayFromRanges(length, ranges);
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dString = String.fromCharCode.apply(this, unicodeNumbers);
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return dString;
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}
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function date(endDate, startDate) {
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if (endDate == null) {
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throw "end date is required.";
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}
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var endDateTime = endDate.getTime();
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var startDateTime = startDate != null ? startDate.getTime() : 0;
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return new Date(integer(endDateTime, startDateTime));
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}
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function dateArray(length, endDate, startDate) {
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return _array(length, date, [endDate, startDate]);
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}
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function string(maxLength, minLength) {
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if (randomExt.DEBUG) {
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console.log("string maxLength:", maxLength, " minLength:", minLength);
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}
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return _stringFromRanges(maxLength, minLength, [[32, 126]]);
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}
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function uString(maxLength, minLength) {
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if (randomExt.DEBUG) {
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console.log("string maxLength:", maxLength, " minLength:", minLength);
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}
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return _stringFromRanges(maxLength, minLength, [[1, 9999]]);
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}
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function stringArray(arrayLength, stringMaxLength, stringMinLength) {
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return _array(arrayLength, string, [stringMaxLength, stringMinLength]);
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}
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function restrictedString(content, maxLength, minLength) {
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var ranges = [];
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for (var i = 0; i < content.length; ++i) {
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var contentType = content[i];
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switch (contentType) {
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case randomExt.CHAR_TYPE.SPECIAL:
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ranges = ranges.concat([
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[33, 47],
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[58, 64],
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[91, 96],
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[123, 126],
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]);
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break;
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case randomExt.CHAR_TYPE.SPACE:
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ranges = ranges.concat([[32, 32]]);
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break;
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case randomExt.CHAR_TYPE.NUMERIC:
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ranges = ranges.concat([[48, 57]]);
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break;
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case randomExt.CHAR_TYPE.UPPERCASE:
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ranges = ranges.concat([[65, 90]]);
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break;
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case randomExt.CHAR_TYPE.LOWERCASE:
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ranges = ranges.concat([[97, 122]]);
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break;
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case randomExt.CHAR_TYPE.HEX:
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ranges = ranges.concat([
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[48, 57],
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[97, 102],
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]);
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break;
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default:
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if (typeof contentType === "string") {
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for (var j = 0; j < contentType.length; ++j) {
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ranges = ranges.concat([
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[contentType.charCodeAt(j), contentType.charCodeAt(j)],
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]);
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}
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}
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}
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}
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return _stringFromRanges(maxLength, minLength, ranges);
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}
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function restrictedStringArray(arrayLength, content, stringMaxLength, stringMinLength) {
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return _array(arrayLength, restrictedString, [content, stringMaxLength, stringMinLength]);
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}
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function _fromDescriptor(randomDescriptor) {
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var randomValue = null;
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if (
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randomDescriptor == null ||
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!randomDescriptor.shift ||
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randomDescriptor.length <= 0 ||
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typeof randomDescriptor[0] !== "function"
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) {
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randomValue = randomDescriptor;
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} else {
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var randomFunction = randomDescriptor[0];
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if (randomDescriptor.length > 1) {
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var propertyValueArgs = randomDescriptor.slice(1, randomDescriptor.length);
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randomValue = randomFunction.apply(this, propertyValueArgs);
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} else {
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randomValue = randomFunction();
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}
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}
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return randomValue;
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}
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function object(template) {
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if (randomExt.DEBUG) {
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console.log("object template:", template);
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}
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var newObject = {};
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var properties = Object.getOwnPropertyNames(template);
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for (var i = 0; i < properties.length; ++i) {
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var property = properties[i];
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var randomDescriptor = template[property];
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newObject[property] = _fromDescriptor(randomDescriptor);
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}
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return newObject;
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}
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function objectArray(length, template) {
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return _array(length, object, [template]);
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}
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function stringPattern(pattern, variableDefinition) {
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var stringPattern = pattern;
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var properties = Object.getOwnPropertyNames(variableDefinition);
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var replacedStringArray = new Array();
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for (var i = 0; i < stringPattern.length; ++i) {
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if (variableDefinition.hasOwnProperty(stringPattern[i])) {
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replacedStringArray[i] = _fromDescriptor(variableDefinition[stringPattern[i]]);
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} else {
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replacedStringArray[i] = stringPattern[i];
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}
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}
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return replacedStringArray.join("");
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}
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function stringPatternArray(length, pattern, variableDefinition) {
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return _array(length, stringPattern, [pattern, variableDefinition]);
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}
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function pick(array) {
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if (array == null) {
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throw "input array is null or undefined.";
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}
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return array[integer(array.length - 1)];
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}
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function shuffle(array) {
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if (array == null) {
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throw "input array is null or undefined.";
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}
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for (var i = 0; i < array.length; ++i) {
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var randomIndex = integer(array.length - 1);
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var temp = array[randomIndex];
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array[randomIndex] = array[i];
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array[i] = temp;
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}
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}
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function subArray(array, length) {
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// validation
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if (array == null) {
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throw "input array is null or undefined.";
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} else if (length == null) {
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throw "input length is null or undefined.";
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} else if (array.length < length) {
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throw "input length [" + length + "] must not exceed array length [" + array.length + "]";
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}
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// logic
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var copiedArray = array.slice();
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shuffle(copiedArray);
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return copiedArray.slice(0, length);
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}
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function splitArray(array, count, ensureEqualSize) {
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if (array == null || count == null) {
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throw "array and count is required.";
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}
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if (array.length < count) {
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throw "input array length is not sufficient for the split.";
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}
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var arrayCopy = [...array];
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shuffle(arrayCopy);
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var outputArrays = [];
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for (var i = count, start = 0, remaining = arrayCopy.length; i > 0; --i) {
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var nextLength = ensureEqualSize
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? Math.ceil(remaining / i)
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: i === 1
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? remaining
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: integer(remaining - i, 1);
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var slicedArray = arrayCopy.slice(start, start + nextLength);
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remaining -= slicedArray.length;
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start += slicedArray.length;
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outputArrays.push(slicedArray);
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}
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return outputArrays;
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}
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function color() {
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return "#".concat(((Math.random() * 0xffffff) << 0).toString(16));
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}
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function guid() {
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return randomExt.stringPattern("xxxxxxxx-xxxx-yxxx-zxxx-xxxxxxxxxxxx", {
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x: [randomExt.restrictedString, [randomExt.CHAR_TYPE.HEX], 1, 1],
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y: [randomExt.restrictedString, ["12345"], 1, 1],
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z: [randomExt.restrictedString, ["89ab"], 1, 1],
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});
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}
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var randomExt = {
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boolean: boolean,
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booleanArray: booleanArray,
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integer: integer,
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integerArray: integerArray,
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float: float,
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floatArray: floatArray,
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date: date,
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dateArray: dateArray,
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string: string,
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uString: uString,
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stringArray: stringArray,
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restrictedString: restrictedString,
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restrictedStringArray: restrictedStringArray,
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object: object,
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objectArray: objectArray,
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stringPattern: stringPattern,
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stringPatternArray: stringPatternArray,
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pick: pick,
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shuffle: shuffle,
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subArray: subArray,
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splitArray: splitArray,
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color: color,
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guid: guid,
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CHAR_TYPE: {
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LOWERCASE: 0,
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UPPERCASE: 1,
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NUMERIC: 2,
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SPECIAL: 3,
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SPACE: 4,
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HEX: 5,
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},
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DEBUG: false,
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};
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module.exports = randomExt;
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