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/**
* Utility class for generic helper functions.
*/
export class GenericUtils {
/**
* Generates a random UUID (v4).
* @returns A string representation of a UUID.
*/
public static uuidv4(): string { // https://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
const r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
}
/** @internal */
private static _normalize_map: Map<string, string> = new Map();
/**
* Normalizes a string to be used as a variable.
* @param str - The string to be normalized.
* @returns The normalized string or null if no string is provided.
*/
public static Normalize(str: string | null) : string | null {
if (str){
let _str = this._normalize_map.get(str);
if (!_str){
_str = str.normalize("NFD").replace(/[\u0300-\u036f]/g, "").toLowerCase().replace(/\s/g, "_");
this._normalize_map.set(str, _str);
}
return _str;
}
return null; // no string provided
}
/**
* Enables advanced logging on the console.
* @returns Returns the hardcoded value for verbose logging.
*/
public static VerboseLogging(level: number): boolean {
return level < 4;
}
/**
* Delays refresh to be perfomed every clock tick
* @returns Returns the hardcoded value for delay refresh (true for production / expected behaviour).
*/
public static DelayedRefresh(): boolean {
return true; // production value should be true
}
/********************************/
/* CRC32 CALCULATION */
/********************************/
private static _global_crcTable: Array <number> | null = null;
/**
* Calculates the CRC32 checksum of a given string.
* This checksum is commonly used for error-checking in data transmission.
* @param str - The input string to calculate the CRC32 checksum for. If null, it defaults to an empty string.
* @returns The calculated CRC32 checksum as an unsigned integer.
*/
public static CRC32(str: string | null): number{
// https://stackoverflow.com/questions/18638900/javascript-crc32
if (!str){
str = '';
}
// build the CRC lookup table
if (!this._global_crcTable){
this._global_crcTable = [];
for(let n=0; n < 256; n++) {
let c = n;
for(let k=0; k < 8; k++) {
c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
}
this._global_crcTable[n] = c;
}
}
// calculate the CRC value
let crc = 0 ^ (-1);
for (let i=0; i < str.length; i++ ) {
crc = (crc >>> 8) ^ this._global_crcTable[(crc ^ str.charCodeAt(i)) & 0xFF];
}
return (crc ^ (-1)) >>> 0;
}
/********************************/
/* DEEP OBJECT COPY */
/********************************/
/**
* Creates a deep copy of the given object.
* @param obj - The object to be copied.
* @returns A deep copy of the object.
*/
public static CopyObject(obj: any){
if (obj === null || typeof obj !== 'object') {
return obj;
}
Iif (obj instanceof Date) { // create new instance for Date entries
return new Date(obj.getTime());
}
// assings each property cloned object to the new object
const _cloned: any = Array.isArray(obj) ? [] : {};
for (const key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
_cloned[key] = this.CopyObject(obj[key]);
}
}
return _cloned;
}
/********************************/
/* SIMPLE (QUICK) HASH */
/********************************/
/**
* Generates a simple hash of a given string.
* @param str - The string to hash.
* @returns The hashed string.
*/
public static simpleHash(str: string){
const rev = str.split('').reverse().join('');
function _hash(str: string) {
let hash = 0;
for (let i = 0; i < str.length; i++) {
const char = str.charCodeAt(i);
hash = (hash << 5) - hash + char;
}
return (hash >>> 0).toString(36).padStart(7, '0');
}
return _hash(str) + _hash(rev);
}
/********************************/
/* ARRAY BUFFER SERIALIZATION */
/********************************/
/**
* Converts an image URL to a base64 string.
* @param url - The image URL.
* @param format - The format of the image (default is 'image/png').
* @param resize - The resize factor (default is 1.0).
* @param quality - The quality factor (default is 0.8).
* @returns A promise that resolves to the base64 string of the image.
*/
public static imageTobase64(url: string, format='image/png', resize=1.0, quality=0.8) {
return new Promise <string> ((resolve, reject) =>{
const _img = new Image();
_img.onload = () => {
const _cnv: any = document.createElement("canvas");
const _ctx: any = _cnv.getContext("2d");
_cnv.width = _img.naturalWidth * resize;
_cnv.height = _img.naturalHeight * resize;
_ctx.drawImage(_img, 0, 0, _cnv.width, _cnv.height);
resolve(_cnv.toDataURL(format, quality));
}
_img.onerror = () => {
reject(new Error(`Failed to load image from URL: ${url}`));
};
_img.crossOrigin = "Anonymous";
_img.src = url;
});
}
/**
* Converts a Uint8Array to a base64 string.
* @param bytes - The Uint8Array to convert.
* @returns The base64 encoded string.
*/
public static uint8ArrayToBase64(bytes: Uint8Array): string {
const length = bytes.byteLength;
let binary = '';
for (let i = 0; i < length; i++) {
binary += String.fromCharCode(bytes[i]);
}
return window.btoa(binary);
}
/**
* Converts a base64 string to a Uint8Array.
* @param base64 - The base64 encoded string.
* @returns The resulting Uint8Array.
*/
public static base64ToUint8Array(base64: string): Uint8Array {
const binary_string = window.atob(base64);
const len = binary_string.length;
const bytes = new Uint8Array(len);
for (let i = 0; i < len; i++) {
bytes[i] = binary_string.charCodeAt(i);
}
return bytes;
}
/**
* Converts an ArrayBuffer to a base64 string.
* @param buffer - The ArrayBuffer to convert.
* @returns The base64 encoded string.
*/
public static arrayBufferToBase64(buffer: ArrayBuffer): string {
const bytes = new Uint8Array(buffer);
const len = bytes.byteLength;
let binary = '';
for (let i = 0; i < len; i++) {
binary += String.fromCharCode(bytes[i]);
}
return window.btoa(binary);
}
/**
* Converts a base64 string to an ArrayBuffer.
* @param base64 - The base64 encoded string.
* @returns The resulting ArrayBuffer.
*/
public static base64ToArrayBuffer(base64: string): ArrayBuffer {
const binary_string = window.atob(base64);
const len = binary_string.length;
const bytes = new Uint8Array(len);
for (let i = 0; i < len; i++) {
bytes[i] = binary_string.charCodeAt(i);
}
return bytes.buffer;
}
/**
* Converts a string to a base64 encoded string.
* @param str - The string to convert.
* @returns The base64 encoded string or null if conversion fails.
*/
public static stringToBase64(str: string): string | null {
const _arraybuffer = new TextEncoder().encode(str).buffer;
if (_arraybuffer){
return GenericUtils.arrayBufferToBase64(_arraybuffer);
}
return null;
}
/**
* Converts a base64 string back to a regular string.
* @param base64 - The base64 encoded string.
* @returns The decoded string or null if conversion fails.
*/
public static base64ToString(base64: string): string | null {
const _arraybuffer = GenericUtils.base64ToArrayBuffer(base64);
if (_arraybuffer){
return new TextDecoder().decode(_arraybuffer);
}
return null;
}
/********************************/
/* MYSQL DATA CONVERSION */
/********************************/
/**
* Converts a MySQL datetime string to an ISO 8601 date string.
* This method replaces the space in a MySQL datetime string with a `T`
* and appends `.000Z` to convert it to UTC format.
*
* @param date - The MySQL datetime string to convert. Example: `"2024-12-19 12:34:56"`.
* @returns The ISO 8601 date string in UTC format, or `null` if the input is `null` or empty.
*/
public static mysqlToDateStr(date: string | null): string | null {
return date ? date.replace(' ', 'T') + '.000Z' : null;
}
/**
* Converts a `Date` object to a MySQL datetime string.
* This method formats the date in the MySQL `YYYY-MM-DD HH:MM:SS` format in UTC.
*
* @param date - The `Date` object to convert.
* @returns The formatted MySQL datetime string in UTC.
*/
public static dateStrToMysql(date: Date | null | undefined) : string | null{
if (date){
let _mysqldate = '';
_mysqldate += date.getUTCFullYear() + '-';
_mysqldate += ('00' + (date.getUTCMonth()+1)).slice(-2) + '-';
_mysqldate += ('00' + date.getUTCDate()).slice(-2) + ' ';
_mysqldate += ('00' + date.getUTCHours()).slice(-2) + ':';
_mysqldate += ('00' + date.getUTCMinutes()).slice(-2) + ':';
_mysqldate += ('00' + date.getUTCSeconds()).slice(-2);
return _mysqldate;
}
return null;
}
/**
* Extracts the file name from a file path for MySQL storage.
* This method removes the directory path, leaving only the file name.
*
* @param file - The file path to process. Example: `"/path/to/file.jpg"`.
* @returns The extracted file name, or `null` if the input is `null` or empty.
*/
public static uploadToMysql(file: string | null){
return file ? file.substring(file.lastIndexOf('/') + 1) : null;
}
/**
* Converts a MySQL file reference to a full upload URL.
* This method constructs a URL using a base URL, upload path, and the provided file name.
*
* @param file - The file name stored in MySQL. Example: `"file.jpg"`.
* @returns The full upload URL, or `null` if the input is `null` or empty.
* Example: `"https://example.com/uploads/file.jpg"`.
*/
public static mysqlToUpload(file: string | null){
return file ? (AppConstants.baseURL + AppConstants.uploadPath + file) : null;
}
}
/**
* Utility class for validating Spanish Tax Identifiers such as DNI and CIF.
*/
export class TaxIdValidators {
/**
* Formats a tax ID string.
* @param taxid - The tax ID to format.
* @returns A formatted tax ID string.
*/
public static ToTaxId(taxid: string) : string | null {
Iif (!taxid) {
return null;
}
let _taxid = taxid;
if (taxid){
_taxid = _taxid.toUpperCase().replace(/[^A-Z0-9]/g, '');
}
return _taxid;
}
/*************************/
/* DNI/CIF VALIDATORS */
/*************************/
// https://www.lawebdelprogramador.com/codigo/JavaScript/1992-Validar-un-CIF-NIF-y-DNI.html
/**
* @internal
*/
private static _ValidateDNI(dni: string): boolean {
const lockup = 'TRWAGMYFPDXBNJZSQVHLCKE';
const valueDni: string = dni.substring(0, dni.length - 1);
const letra: string = dni.substring(dni.length - 1).toUpperCase();
if (lockup.charAt(Number(valueDni) % 23) === letra) {
return true;
}
return false;
}
/**
* @internal
*/
private static _ValidateCIF_type1(cif: string): boolean {
const letters: string[] = ['J', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I'];
const digits: string = cif.substring(1, cif.length - 1);
const letter: string = cif.substring(0, 1);
const control: string = cif.substring(cif.length - 1);
let sum = 0;
let i: number;
let digit: number;
if (!letter.match(/[A-Z]/)) {
return false;
}
for (i = 0; i < digits.length; ++i) {
digit = parseInt(digits[i]);
Iif (isNaN(digit)) {
return false;
}
if (i % 2 === 0) {
digit *= 2;
if (digit > 9) {
digit = Math.floor(digit / 10) + (digit % 10);
}
sum += digit;
}
else {
sum += digit;
}
}
sum %= 10;
if (sum !== 0) {
digit = 10 - sum;
}
else E{
digit = sum;
}
if (letter.match(/[ABEH]/)) {
return String(digit) === control;
}
if (letter.match(/[NPQRSW]/)) {
return letters[digit] === control;
}
return String(digit) === control || letters[digit] === control;
}
/**
* @internal
*/
private static _ValidateCIF_type2(cif: string): boolean {
const valueCif = cif.substring(1, cif.length - 1);
let suma = 0;
for (let i = 1; i < valueCif.length; i += 2) {
suma += parseInt(valueCif.substring(i, i + 1));
}
let suma2 = 0;
for (let i = 0; i < valueCif.length; i += 2) {
const result = parseInt(valueCif.substring(i, i + 1)) * 2;
if (String(result).length === 1) {
suma2 += result;
} else {
suma2 += parseInt(String(result).substring(0, 1)) + parseInt(String(result).substring(1, 2));
}
}
suma += suma2;
let unidad = parseInt(String(suma).substring(1, 2));
unidad = 10 - unidad;
Iif (unidad === 10) {
unidad = 0;
}
return (cif.substring(cif.length - 1) === String(unidad));
}
/**
* @internal
*/
private static _ValidateCIF(cif: string): boolean {
if (!cif || cif.length !== 9) {
return false;
}
const primerCaracter = cif.substring(0, 1);
if (primerCaracter.match(/^[XYZ]$/)) {
let newcif = "";
if (primerCaracter === "X") {
newcif = cif.substring(1);
}
if (primerCaracter === "Y") {
newcif = "1" + cif.substring(1);
}
if (primerCaracter === "Z") {
newcif = "2" + cif.substring(1);
}
return this._ValidateDNI(newcif);
}
return this._ValidateCIF_type1(cif) || this._ValidateCIF_type2(cif) || this._ValidateDNI(cif);
}
/**
* Validates a generic Spanish tax ID (DNI or CIF).
* @param value - The tax ID to validate.
* @returns True if the tax ID is valid, otherwise false.
*/
public static ValidateTaxId(value: string | null): boolean{
let _valid = false;
if (!value){
return false;
}
const _taxid = this.ToTaxId(value);
if (_taxid){
_valid = _valid || this._ValidateDNI(_taxid);
_valid = _valid || this._ValidateCIF(_taxid);
}
return _valid;
}
}
/**
* Class for managing global mutex locks.
*
* ### Example
* ```typescript
* async function exampleUsage() {
* // Create an instance of GlobalMutex
* const mutex = new GlobalMutex();
*
* // Define a function that requires exclusive access
* async function criticalSection(key: string) {
* console.log(`Attempting to lock the key: ${key}`);
*
* // Lock the key
* await mutex.lock(key);
* console.log(`Key locked: ${key}`);
*
* // Critical section
* console.log(`Executing critical section for key: ${key}`);
* await new Promise((resolve) => setTimeout(resolve, 1000)); // Simulates async task
*
* // Unlock the key
* mutex.unlock(key);
* console.log(`Key unlocked: ${key}`);
* }
*
* // Run multiple calls with the same key
* criticalSection("resource1");
* criticalSection("resource1");
* criticalSection("resource1");
*
* // Managing different keys simultaneously
* criticalSection("resource2");
* }
*
* // Call the example function
* exampleUsage();
* ```
*/
export class GlobalMutex {
private _mutex: Map<string, { locked: boolean; queue: (() => void)[] }> = new Map();
/**
* @internal
*/
private _getMutex(key: string): { locked: boolean; queue: (() => void)[] } {
if (!this._mutex.has(key)) {
this._mutex.set(key, { locked: false, queue: [] });
}
return this._mutex.get(key) as { locked: boolean; queue: (() => void)[] };
}
/**
* Locks the specified key, blocking further calls until the lock is released.
* @param key - The key to lock.
*/
async lock(key: string) {
const mutex = this._getMutex(key);
await new Promise<void>((resolve) => {
if (!mutex.locked) {
mutex.locked = true;
resolve();
}
else {
mutex.queue.push(resolve);
}
});
}
/**
* Releases the lock on the specified key, allowing queued calls to proceed.
* @param key - The key to unlock.
*/
unlock(key: string) {
const mutex = this._getMutex(key);
if (mutex.queue.length > 0) {
const resolve = mutex.queue.shift();
if (resolve) {
resolve();
}
else E{
mutex.locked = false;
}
}
else {
mutex.locked = false;
}
}
}
/**
* Represents a split of a price amount with its tax information
*/
type TaxesSplit = {
/** The total amount including taxes */
total: number,
/** The tax rate as a percentage (e.g., 21 for 21%) */
rate: number,
/** The base amount without taxes */
base: number,
/** The tax amount */
taxes: number
}
/**
* Aggregated tax information for a price
*/
type TaxesInfo = {
/** The total amount including all taxes */
total: number,
/** The sum of all base amounts without taxes */
base: number,
/** The sum of all tax amounts */
taxes: number,
/** Detailed breakdown of taxes by rate */
split: Array<TaxesSplit>
}
/**
* Comprehensive price information with tax details and formatting
*
*/
export type PriceType = {
/** The total price value including taxes */
val: number,
/** Indicates whether the price is negative */
neg: boolean,
/** The absolute value of the price (always positive) */
abs: number,
/** The integer part of the absolute price value */
int: string,
/** The decimal part of the absolute price value */
dec: string,
/** Formatted price string with comma as decimal separator (e.g., "123,45") */
str: string,
/** Detailed tax information including base amounts, tax amounts, and breakdown by tax rates */
tax: TaxesInfo,
/** Detailed discount information including base amounts, tax amounts, and breakdown by tax rates */
dsc: TaxesInfo
}
/**
* A class for handling price calculations with different tax rates
*
* This class manages price components with their respective tax rates,
* calculates tax amounts, and provides formatted price information.
* It supports multiple discounts that are applied proportionally across
* all tax groups based on their relative weight in the total.
*
* @example
* ```typescript
* const price = new PriceInfo();
* price.Add(100, 21); // Add 100€ with 21% tax rate
* price.Add(50, 10); // Add 50€ with 10% tax rate
* price.Del(30); // Add a 30€ discount
* const priceInfo = price.price; // Get complete price information
* console.log(`Total: ${priceInfo.val}€, Taxes: ${priceInfo.tax.taxes}€`);
* // Output: Total: 120€, Taxes: ~19.83€
* ```
*
* @example Multiple discounts
* ```typescript
* const price = new PriceInfo();
* price.Add(100, 21); // Add 100€ with 21% tax rate
* price.Add(50, 10); // Add 50€ with 10% tax rate
* price.Del(30); // First discount: 30€
* price.Del(20); // Second discount: 20€ (applied to remaining amount)
* const priceInfo = price.price;
* console.log(`Final total: ${priceInfo.val}€`);
* // Discounts are applied proportionally to each tax group
* ```
*/
export class PriceInfo {
private _val = 0; // total price value
private _dsc = 0; // total discount value
private _taxmap = new Map <number, TaxesSplit> (); // increments map
private _dscmap = new Map <number, TaxesSplit> (); // decrements map
/**
* Creates a new PriceInfo instance
*
* @param total - Optional initial amount to add (including tax)
* @param rate - Optional tax rate for the initial amount as a percentage (e.g., 21 for 21%)
*/
constructor(total = 0, rate = AppConstants.defaultTaxRate){
this.Add(total, rate);
}
/**
* Adds a price amount with a specific tax rate to the price
*
* If multiple amounts are added with the same tax rate, they will be
* aggregated into a single tax group.
*
* @param amount - The amount to add (including tax). Must be positive.
* @param taxrate - The tax rate as a percentage (e.g., 21 for 21%). Must be non-negative.
*
* @example
* ```typescript
* price.Add(100, 21); // Add 100€ with 21% tax
* price.Add(50, 21); // Add another 50€ with same tax rate (will aggregate)
* // Result: 150€ total with 21% tax rate
* ```
*/
Add(amount: number, taxrate: number): void {
this._val += amount;
let _split: TaxesSplit | null = this._taxmap.get(taxrate) || null;
Iif (!_split){
_split = { total: 0, rate: taxrate, base: 0, taxes: 0 };
}
_split.total += amount;
this._taxmap.set(taxrate, _split);
}
/**
* Removes a gross amount from the total, distributed proportionally across all existing tax rates.
*
* The removal amount is allocated to each tax group based on its relative weight in the total.
* Both base and tax amounts are adjusted accordingly. The discount is applied when the
* price getter is called, ensuring all prices are set before calculating proportions.
*
* @param taxmap - Array of tax splits (cloned from _taxmap) to apply discounts to
* @param amount - The total amount to remove (including tax). Must be positive.
*
* @remarks
* This method modifies the provided taxmap array in-place and updates the internal
* _dscmap with the discount amounts for each tax rate. Discounts are limited by
* the available amount in each tax group (cannot exceed the group's total).
*
* @internal This is a private method used internally by the price getter.
*/
private discount(taxmap: TaxesSplit[], amount: number): void {
Iif (amount === 0 || this._val === 0) {
return;
}
let total = 0;
for (const split of taxmap){
total += split.total;
}
let _applied = 0;
for (const split of taxmap){
let disct: TaxesSplit | null = this._dscmap.get(split.rate) || null;
Iif (!disct){
disct = { total: 0, rate: split.rate, base: 0, taxes: 0 };
}
const _toapply = Math.min(amount * (split.total / total), split.total);
disct.total += _toapply;
_applied += _toapply;
split.total -= _toapply; // adjust the remaining price (in the copy)
this._dscmap.set(split.rate, disct);
}
this._dsc += _applied;
}
private _discounts: Array <number> = [];
/**
* Pushes a discount value to be applied on final price calculation
*
* Discounts are not applied immediately but stored for calculation when
* the price getter is accessed. This allows for proper proportional
* distribution based on the final price composition.
*
* Multiple discounts are applied sequentially, with each subsequent
* discount applied to the remaining amount after previous discounts.
*
* @param amount - The total amount to remove (including tax). Must be positive.
*
* @example
* ```typescript
* price.Del(30); // Queue first discount
* price.Del(20); // Queue second discount
* const info = price.price; // Both discounts applied proportionally
* ```
*/
Del(amount: number){
this._discounts.push(amount);
}
/**
* Gets comprehensive price information including tax calculations and formatting
*
* This property calculates the final price by applying all queued discounts
* proportionally across tax groups, then computes base amounts, tax amounts,
* and formats the result.
*
* Discounts are applied in the order they were added, with each discount
* applied to the remaining amount after previous discounts.
*
* @returns An object containing:
* - val: Total price value after discounts
* - neg: Flag indicating if the price is negative
* - abs: Absolute price value
* - int: Integer part of the absolute price
* - dec: Decimal part of the absolute price
* - str: Formatted price as string with comma as decimal separator
* - tax: Detailed tax information for the final amount
* - dsc: Detailed discount information broken down by tax rate
*
* @example
* ```typescript
* const price = new PriceInfo();
* price.Add(121, 21); // 100€ base + 21€ tax
* const info = price.price;
* console.log(info.val); // 121
* console.log(info.tax.base); // ~100
* console.log(info.tax.taxes); // ~21
* console.log(info.str); // "121,00"
* ```
*/
get price(): PriceType {
const _taxes: TaxesInfo = { total: 0, base: 0, taxes: 0, split: [] };
const _dscnt: TaxesInfo = { total: 0, base: 0, taxes: 0, split: [] };
// clone the source taxmap so its not affected by discounts aplication
const _taxmap: TaxesSplit[] = Array.from(this._taxmap.values()).map(split => ({
total: split.total,
rate: split.rate,
base: split.base,
taxes: split.taxes
}));
// calculate the discounts once all the prices are set
this._dscmap.clear();
for(const _disc of this._discounts){
this.discount(_taxmap, _disc);
}
// calculate the final price information
for(const split of this._taxmap.values()){
split.base = split.total / (1 + (split.rate / 100));
split.taxes = split.total - split.base;
_taxes.split.push(split);
_taxes.total += split.total;
_taxes.base += split.base;
_taxes.taxes += split.taxes;
}
// adjust the totals with the discounts
for(const split of this._dscmap.values()){
split.base = split.total / (1 + (split.rate / 100));
split.taxes = split.total - split.base;
_dscnt.split.push(split);
_taxes.total -= split.total;
_taxes.base -= split.base;
_taxes.taxes -= split.taxes;
}
_taxes.total = Math.round(_taxes.total * 100) / 100;
_taxes.base = Math.round(_taxes.base * 100) / 100;
_taxes.taxes = Math.round(_taxes.taxes * 100) / 100;
const _val = this._val - this._dsc;
const _abs = Math.abs(_val);
const [_int, _dec] = _abs.toFixed(2).split(".");
return {
val: _val,
neg: (_val < 0),
abs: _abs,
str: _int + "," + _dec,
int: _int,
dec: _dec,
tax: _taxes,
dsc: _dscnt
}
}
} |