/*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License.
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*/
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/**
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* @hidden
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*/
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export class StringUtils {
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/**
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* Check if stringified object is empty
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* @param strObj
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*/
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static isEmptyObj(strObj?: string): boolean {
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if (strObj) {
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try {
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const obj = JSON.parse(strObj);
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return Object.keys(obj).length === 0;
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} catch (e) {}
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}
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return true;
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}
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static startsWith(str: string, search: string): boolean {
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return str.indexOf(search) === 0;
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}
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static endsWith(str: string, search: string): boolean {
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return (
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str.length >= search.length &&
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str.lastIndexOf(search) === str.length - search.length
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);
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}
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/**
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* Parses string into an object.
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*
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* @param query
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*/
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static queryStringToObject<T>(query: string): T {
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const obj: {} = {};
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const params = query.split("&");
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const decode = (s: string) => decodeURIComponent(s.replace(/\+/g, " "));
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params.forEach((pair) => {
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if (pair.trim()) {
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const [key, value] = pair.split(/=(.+)/g, 2); // Split on the first occurence of the '=' character
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if (key && value) {
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obj[decode(key)] = decode(value);
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}
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}
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});
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return obj as T;
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}
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/**
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* Trims entries in an array.
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*
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* @param arr
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*/
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static trimArrayEntries(arr: Array<string>): Array<string> {
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return arr.map((entry) => entry.trim());
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}
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/**
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* Removes empty strings from array
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* @param arr
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*/
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static removeEmptyStringsFromArray(arr: Array<string>): Array<string> {
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return arr.filter((entry) => {
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return !!entry;
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});
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}
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/**
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* Attempts to parse a string into JSON
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* @param str
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*/
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static jsonParseHelper<T>(str: string): T | null {
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try {
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return JSON.parse(str) as T;
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} catch (e) {
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return null;
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}
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}
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}
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