155 lines
4.0 KiB
JavaScript
155 lines
4.0 KiB
JavaScript
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export default class Validation {
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/*
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isNullOrWhitespace(v) {
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let txt = JSON.stringify(v).replace('/\s\g', '');
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return (txt == '' || 'null');
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}
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*/
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static isEmpty(object) {
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let isEmpty = true;
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if (object !== null && object !== "null" && object !== undefined && object !== "undefined") {
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if (object.length == undefined) {
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isEmpty = false; // object exists but isn't a collection
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}
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else if (typeof object === "function") {
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isEmpty = false; // object is reference
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}
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else { // string or collection
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let isString = (typeof object == "string");
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if (isString) object = object.trim();
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if (object.length > 0) {
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if (isString) {
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isEmpty = false; // String greater than length 0
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}
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else {
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if (typeof object[0] != "string") {
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isEmpty = false;
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}
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else {
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for(let i = 0; i < object.length; i++) {
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if (object[i] != "") {
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isEmpty = false;
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break
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}
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}
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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 isEmpty;
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}
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static isValidNumber(value, positiveOnly) {
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return !Validation.isEmpty(value) && !isNaN(value) && (!positiveOnly || parseFloat(value) > 0);
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}
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static getDataContentType(params) {
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var data = null;
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var contentType = '';
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if (!Validation.isEmpty(params)) {
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if (typeof params === "string") {
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data = params;
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contentType = "application/x-www-form-urlencoded; charset=UTF-8";
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}
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else {
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data = JSON.stringify(params);
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contentType = "application/json; charset=UTF-8";
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}
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}
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return { Data: data, ContentType: contentType };
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}
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static arrayContainsItem(array, itemValue) {
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var hasItem = false;
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if (!Validation.isEmpty(array) && !Validation.isEmpty(itemValue)) {
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var isJQueryElementArray = array[0] instanceof jQuery;
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if (isJQueryElementArray) {
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for (let i = 0; i < array.length; i++) {
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if (document.querySelectorAll(array[i]).is(itemValue)) {
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hasItem = true;
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break;
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}
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}
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}
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else {
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var isDate = array[0] instanceof Date;
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if (isDate) {
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for (let i = 0; i < array.length; i++) {
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if (array[i].getTime() === itemValue.getTime()) {
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hasItem = true;
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break;
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}
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}
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}
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else {
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for (let i = 0; i < array.length; i++) {
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if (array[i] == itemValue) {
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hasItem = true;
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break;
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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 hasItem;
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}
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static dictHasKey(d, k) {
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return (k in d);
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}
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static areEqualDicts(dict1, dict2) {
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const keys1 = Object.keys(dict1);
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const keys2 = Object.keys(dict2);
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if (keys1.length !== keys2.length) {
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return false;
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}
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for (let key of keys1) {
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if (dict1[key] !== dict2[key]) {
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return false;
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}
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}
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return true;
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}
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static imageExists(url, callback) {
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var img = new Image();
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img.onload = function() { callback(true); };
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img.onerror = function() { callback(false); };
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img.src = url;
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}
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}
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