mirror of
https://github.com/SillyTavern/SillyTavern.git
synced 2024-12-12 09:26:33 +01:00
935 lines
30 KiB
JavaScript
935 lines
30 KiB
JavaScript
import { getContext } from "./extensions.js";
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import { getRequestHeaders } from "../script.js";
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import { isMobile } from "./RossAscends-mods.js";
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/**
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* Pagination status string template.
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* @type {string}
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*/
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export const PAGINATION_TEMPLATE = '<%= rangeStart %>-<%= rangeEnd %> of <%= totalNumber %>';
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/**
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* Navigation options for pagination.
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* @enum {number}
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*/
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export const navigation_option = { none: 0, previous: 1, last: 2, };
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/**
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* Determines if a value is unique in an array.
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* @param {any} value Current value.
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* @param {number} index Current index.
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* @param {any} array The array being processed.
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* @returns {boolean} True if the value is unique, false otherwise.
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*/
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export function onlyUnique(value, index, array) {
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return array.indexOf(value) === index;
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}
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/**
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* Checks if a string only contains digits.
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* @param {string} str The string to check.
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* @returns {boolean} True if the string only contains digits, false otherwise.
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* @example
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* isDigitsOnly('123'); // true
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* isDigitsOnly('abc'); // false
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*/
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export function isDigitsOnly(str) {
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return /^\d+$/.test(str);
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}
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/**
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* Gets a drag delay for sortable elements. This is to prevent accidental drags when scrolling.
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* @returns {number} The delay in milliseconds. 50ms for desktop, 750ms for mobile.
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*/
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export function getSortableDelay() {
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return isMobile() ? 750 : 50;
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}
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export async function bufferToBase64(buffer) {
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// use a FileReader to generate a base64 data URI:
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const base64url = await new Promise(resolve => {
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const reader = new FileReader()
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reader.onload = () => resolve(reader.result)
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reader.readAsDataURL(new Blob([buffer]))
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});
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// remove the `data:...;base64,` part from the start
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return base64url.slice(base64url.indexOf(',') + 1);
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}
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/**
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* Rearranges an array in a random order.
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* @param {any[]} array The array to shuffle.
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* @returns {any[]} The shuffled array.
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* @example
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* shuffle([1, 2, 3]); // [2, 3, 1]
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*/
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export function shuffle(array) {
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let currentIndex = array.length,
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randomIndex;
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while (currentIndex != 0) {
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randomIndex = Math.floor(Math.random() * currentIndex);
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currentIndex--;
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[array[currentIndex], array[randomIndex]] = [
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array[randomIndex],
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array[currentIndex],
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];
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}
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return array;
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}
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/**
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* Downloads a file to the user's devices.
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* @param {BlobPart} content File content to download.
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* @param {string} fileName File name.
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* @param {string} contentType File content type.
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*/
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export function download(content, fileName, contentType) {
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const a = document.createElement("a");
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const file = new Blob([content], { type: contentType });
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a.href = URL.createObjectURL(file);
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a.download = fileName;
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a.click();
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}
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/**
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* Fetches a file by URL and parses its contents as data URI.
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* @param {string} url The URL to fetch.
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* @param {any} params Fetch parameters.
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* @returns {Promise<string>} A promise that resolves to the data URI.
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*/
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export async function urlContentToDataUri(url, params) {
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const response = await fetch(url, params);
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const blob = await response.blob();
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return await new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.onload = function () {
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resolve(String(reader.result));
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};
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reader.onerror = function (error) {
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reject(error);
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};
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reader.readAsDataURL(blob);
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});
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}
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/**
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* Returns a promise that resolves to the file's text.
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* @param {Blob} file The file to read.
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* @returns {Promise<string>} A promise that resolves to the file's text.
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*/
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export function getFileText(file) {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.readAsText(file);
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reader.onload = function () {
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resolve(String(reader.result));
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};
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reader.onerror = function (error) {
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reject(error);
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};
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});
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}
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/**
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* Returns a promise that resolves to the file's array buffer.
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* @param {Blob} file The file to read.
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*/
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export function getFileBuffer(file) {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.readAsArrayBuffer(file);
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reader.onload = function () {
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resolve(reader.result);
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};
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reader.onerror = function (error) {
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reject(error);
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};
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});
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}
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/**
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* Returns a promise that resolves to the base64 encoded string of a file.
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* @param {Blob} file The file to read.
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* @returns {Promise<string>} A promise that resolves to the base64 encoded string.
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*/
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export function getBase64Async(file) {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.readAsDataURL(file);
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reader.onload = function () {
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resolve(String(reader.result));
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};
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reader.onerror = function (error) {
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reject(error);
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};
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});
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}
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/**
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* Parses a file blob as a JSON object.
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* @param {Blob} file The file to read.
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* @returns {Promise<any>} A promise that resolves to the parsed JSON object.
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*/
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export async function parseJsonFile(file) {
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return new Promise((resolve, reject) => {
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const fileReader = new FileReader();
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fileReader.readAsText(file);
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fileReader.onload = event => resolve(JSON.parse(String(event.target.result)));
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fileReader.onerror = error => reject(error);
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});
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}
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/**
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* Calculates a hash code for a string.
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* @param {string} str The string to hash.
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* @param {number} [seed=0] The seed to use for the hash.
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* @returns {number} The hash code.
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*/
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export function getStringHash(str, seed = 0) {
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if (typeof str !== 'string') {
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return 0;
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}
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let h1 = 0xdeadbeef ^ seed,
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h2 = 0x41c6ce57 ^ seed;
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for (let i = 0, ch; i < str.length; i++) {
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ch = str.charCodeAt(i);
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h1 = Math.imul(h1 ^ ch, 2654435761);
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h2 = Math.imul(h2 ^ ch, 1597334677);
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}
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h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507) ^ Math.imul(h2 ^ (h2 >>> 13), 3266489909);
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h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507) ^ Math.imul(h1 ^ (h1 >>> 13), 3266489909);
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return 4294967296 * (2097151 & h2) + (h1 >>> 0);
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};
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/**
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* Creates a debounced function that delays invoking func until after wait milliseconds have elapsed since the last time the debounced function was invoked.
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* @param {function} func The function to debounce.
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* @param {number} [timeout=300] The timeout in milliseconds.
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* @returns {function} The debounced function.
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*/
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export function debounce(func, timeout = 300) {
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let timer;
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return (...args) => {
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clearTimeout(timer);
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timer = setTimeout(() => { func.apply(this, args); }, timeout);
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};
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}
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/**
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* Creates a throttled function that only invokes func at most once per every limit milliseconds.
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* @param {function} func The function to throttle.
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* @param {number} [limit=300] The limit in milliseconds.
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* @returns {function} The throttled function.
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*/
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export function throttle(func, limit = 300) {
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let lastCall;
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return (...args) => {
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const now = Date.now();
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if (!lastCall || (now - lastCall) >= limit) {
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lastCall = now;
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func.apply(this, args);
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}
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};
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}
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/**
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* Checks if an element is in the viewport.
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* @param {Element} el The element to check.
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* @returns {boolean} True if the element is in the viewport, false otherwise.
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*/
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export function isElementInViewport(el) {
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if (typeof jQuery === "function" && el instanceof jQuery) {
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el = el[0];
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}
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var rect = el.getBoundingClientRect();
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return (
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rect.top >= 0 &&
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rect.left >= 0 &&
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rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && /* or $(window).height() */
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rect.right <= (window.innerWidth || document.documentElement.clientWidth) /* or $(window).width() */
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);
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}
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/**
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* Returns a name that is unique among the names that exist.
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* @param {string} name The name to check.
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* @param {{ (y: any): boolean; }} exists Function to check if name exists.
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* @returns {string} A unique name.
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*/
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export function getUniqueName(name, exists) {
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let i = 1;
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let baseName = name;
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while (exists(name)) {
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name = `${baseName} (${i})`;
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i++;
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}
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return name;
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}
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/**
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* Returns a promise that resolves after the specified number of milliseconds.
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* @param {number} ms The number of milliseconds to wait.
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* @returns {Promise<void>} A promise that resolves after the specified number of milliseconds.
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*/
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export function delay(ms) {
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return new Promise((res) => setTimeout(res, ms));
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}
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/**
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* Checks if an array is a subset of another array.
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* @param {any[]} a Array A
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* @param {any[]} b Array B
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* @returns {boolean} True if B is a subset of A, false otherwise.
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*/
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export function isSubsetOf(a, b) {
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return (Array.isArray(a) && Array.isArray(b)) ? b.every(val => a.includes(val)) : false;
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}
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/**
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* Increments the trailing number in a string.
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* @param {string} str The string to process.
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* @returns {string} The string with the trailing number incremented by 1.
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* @example
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* incrementString('Hello, world! 1'); // 'Hello, world! 2'
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*/
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export function incrementString(str) {
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// Find the trailing number or it will match the empty string
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const count = str.match(/\d*$/);
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// Take the substring up until where the integer was matched
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// Concatenate it to the matched count incremented by 1
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return str.substring(0, count.index) + (Number(count[0]) + 1);
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};
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/**
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* Formats a string using the specified arguments.
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* @param {string} format The format string.
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* @returns {string} The formatted string.
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* @example
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* stringFormat('Hello, {0}!', 'world'); // 'Hello, world!'
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*/
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export function stringFormat(format) {
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const args = Array.prototype.slice.call(arguments, 1);
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return format.replace(/{(\d+)}/g, function (match, number) {
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return typeof args[number] != 'undefined'
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? args[number]
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: match
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;
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});
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};
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/**
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* Save the caret position in a contenteditable element.
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* @param {Element} element The element to save the caret position of.
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* @returns {{ start: number, end: number }} An object with the start and end offsets of the caret.
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*/
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export function saveCaretPosition(element) {
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// Get the current selection
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const selection = window.getSelection();
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// If the selection is empty, return null
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if (selection.rangeCount === 0) {
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return null;
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}
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// Get the range of the current selection
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const range = selection.getRangeAt(0);
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// If the range is not within the specified element, return null
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if (!element.contains(range.commonAncestorContainer)) {
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return null;
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}
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// Return an object with the start and end offsets of the range
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const position = {
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start: range.startOffset,
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end: range.endOffset
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};
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console.debug('Caret saved', position);
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return position;
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}
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/**
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* Restore the caret position in a contenteditable element.
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* @param {Element} element The element to restore the caret position of.
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* @param {{ start: any; end: any; }} position An object with the start and end offsets of the caret.
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*/
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export function restoreCaretPosition(element, position) {
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// If the position is null, do nothing
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if (!position) {
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return;
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}
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console.debug('Caret restored', position);
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// Create a new range object
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const range = new Range();
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// Set the start and end positions of the range within the element
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range.setStart(element.childNodes[0], position.start);
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range.setEnd(element.childNodes[0], position.end);
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// Create a new selection object and set the range
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const selection = window.getSelection();
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selection.removeAllRanges();
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selection.addRange(range);
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}
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export async function resetScrollHeight(element) {
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$(element).css('height', '0px');
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$(element).css('height', $(element).prop('scrollHeight') + 3 + 'px');
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}
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/**
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* Sets the height of an element to its scroll height.
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* @param {JQuery<HTMLElement>} element The element to initialize the scroll height of.
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* @returns {Promise<void>} A promise that resolves when the scroll height has been initialized.
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*/
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export async function initScrollHeight(element) {
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await delay(1);
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const curHeight = Number($(element).css("height").replace('px', ''));
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const curScrollHeight = Number($(element).prop("scrollHeight"));
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const diff = curScrollHeight - curHeight;
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if (diff < 3) { return } //happens when the div isn't loaded yet
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const newHeight = curHeight + diff + 3; //the +3 here is to account for padding/line-height on text inputs
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//console.log(`init height to ${newHeight}`);
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$(element).css("height", "");
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$(element).css("height", `${newHeight}px`);
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//resetScrollHeight(element);
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}
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|
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/**
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* Compares elements by their CSS order property. Used for sorting.
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* @param {any} a The first element.
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* @param {any} b The second element.
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* @returns {number} A negative number if a is before b, a positive number if a is after b, or 0 if they are equal.
|
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*/
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export function sortByCssOrder(a, b) {
|
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const _a = Number($(a).css('order'));
|
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const _b = Number($(b).css('order'));
|
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return _a - _b;
|
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}
|
||
|
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/**
|
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* Trims a string to the end of a nearest sentence.
|
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* @param {string} input The string to trim.
|
||
* @param {boolean} include_newline Whether to include a newline character in the trimmed string.
|
||
* @returns {string} The trimmed string.
|
||
* @example
|
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* end_trim_to_sentence('Hello, world! I am from'); // 'Hello, world!'
|
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*/
|
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export function end_trim_to_sentence(input, include_newline = false) {
|
||
const punctuation = new Set(['.', '!', '?', '*', '"', ')', '}', '`', ']', '$', '。', '！', '？', '”', '）', '】', '】', '’', '」', '】']); // extend this as you see fit
|
||
let last = -1;
|
||
|
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for (let i = input.length - 1; i >= 0; i--) {
|
||
const char = input[i];
|
||
|
||
if (punctuation.has(char)) {
|
||
last = i;
|
||
break;
|
||
}
|
||
|
||
if (include_newline && char === '\n') {
|
||
last = i;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (last === -1) {
|
||
return input.trimEnd();
|
||
}
|
||
|
||
return input.substring(0, last + 1).trimEnd();
|
||
}
|
||
|
||
/**
|
||
* Counts the number of occurrences of a character in a string.
|
||
* @param {string} string The string to count occurrences in.
|
||
* @param {string} character The character to count occurrences of.
|
||
* @returns {number} The number of occurrences of the character in the string.
|
||
* @example
|
||
* countOccurrences('Hello, world!', 'l'); // 3
|
||
* countOccurrences('Hello, world!', 'x'); // 0
|
||
*/
|
||
export function countOccurrences(string, character) {
|
||
let count = 0;
|
||
|
||
for (let i = 0; i < string.length; i++) {
|
||
if (string[i] === character) {
|
||
count++;
|
||
}
|
||
}
|
||
|
||
return count;
|
||
}
|
||
|
||
/**
|
||
* Checks if a number is odd.
|
||
* @param {number} number The number to check.
|
||
* @returns {boolean} True if the number is odd, false otherwise.
|
||
* @example
|
||
* isOdd(3); // true
|
||
* isOdd(4); // false
|
||
*/
|
||
export function isOdd(number) {
|
||
return number % 2 !== 0;
|
||
}
|
||
|
||
export function timestampToMoment(timestamp) {
|
||
if (!timestamp) {
|
||
return moment.invalid();
|
||
}
|
||
|
||
// Unix time (legacy TAI)
|
||
if (typeof timestamp === 'number') {
|
||
return moment(timestamp);
|
||
}
|
||
|
||
// ST "humanized" format pattern
|
||
const pattern1 = /(\d{4})-(\d{1,2})-(\d{1,2}) @(\d{1,2})h (\d{1,2})m (\d{1,2})s (\d{1,3})ms/;
|
||
const replacement1 = (match, year, month, day, hour, minute, second, millisecond) => {
|
||
return `${year.padStart(4, "0")}-${month.padStart(2, "0")}-${day.padStart(2, "0")}T${hour.padStart(2, "0")}:${minute.padStart(2, "0")}:${second.padStart(2, "0")}.${millisecond.padStart(3, "0")}Z`;
|
||
};
|
||
const isoTimestamp1 = timestamp.replace(pattern1, replacement1);
|
||
if (moment(isoTimestamp1).isValid()) {
|
||
return moment(isoTimestamp1);
|
||
}
|
||
|
||
// New format pattern: "June 19, 2023 4:13pm"
|
||
const pattern2 = /(\w+)\s(\d{1,2}),\s(\d{4})\s(\d{1,2}):(\d{1,2})(am|pm)/i;
|
||
const replacement2 = (match, month, day, year, hour, minute, meridiem) => {
|
||
const monthNum = moment().month(month).format("MM");
|
||
const hour24 = meridiem.toLowerCase() === 'pm' ? (parseInt(hour, 10) % 12) + 12 : parseInt(hour, 10) % 12;
|
||
return `${year}-${monthNum}-${day.padStart(2, "0")}T${hour24.toString().padStart(2, "0")}:${minute.padStart(2, "0")}:00`;
|
||
};
|
||
const isoTimestamp2 = timestamp.replace(pattern2, replacement2);
|
||
if (moment(isoTimestamp2).isValid()) {
|
||
return moment(isoTimestamp2);
|
||
}
|
||
|
||
// If none of the patterns match, return an invalid moment object
|
||
return moment.invalid();
|
||
}
|
||
|
||
/**
|
||
* Compare two moment objects for sorting.
|
||
* @param {*} a The first moment object.
|
||
* @param {*} b The second moment object.
|
||
* @returns {number} A negative number if a is before b, a positive number if a is after b, or 0 if they are equal.
|
||
*/
|
||
export function sortMoments(a, b) {
|
||
if (a.isBefore(b)) {
|
||
return 1;
|
||
} else if (a.isAfter(b)) {
|
||
return -1;
|
||
} else {
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/** Split string to parts no more than length in size.
|
||
* @param {string} input The string to split.
|
||
* @param {number} length The maximum length of each part.
|
||
* @param {string[]} delimiters The delimiters to use when splitting the string.
|
||
* @returns {string[]} The split string.
|
||
* @example
|
||
* splitRecursive('Hello, world!', 3); // ['Hel', 'lo,', 'wor', 'ld!']
|
||
*/
|
||
export function splitRecursive(input, length, delimiters = ['\n\n', '\n', ' ', '']) {
|
||
const delim = delimiters[0] ?? '';
|
||
const parts = input.split(delim);
|
||
|
||
const flatParts = parts.flatMap(p => {
|
||
if (p.length < length) return p;
|
||
return splitRecursive(input, length, delimiters.slice(1));
|
||
});
|
||
|
||
// Merge short chunks
|
||
const result = [];
|
||
let currentChunk = '';
|
||
for (let i = 0; i < flatParts.length;) {
|
||
currentChunk = flatParts[i];
|
||
let j = i + 1;
|
||
while (j < flatParts.length) {
|
||
const nextChunk = flatParts[j];
|
||
if (currentChunk.length + nextChunk.length + delim.length <= length) {
|
||
currentChunk += delim + nextChunk;
|
||
} else {
|
||
break;
|
||
}
|
||
j++;
|
||
}
|
||
i = j;
|
||
result.push(currentChunk);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* Checks if a string is a valid data URL.
|
||
* @param {string} str The string to check.
|
||
* @returns {boolean} True if the string is a valid data URL, false otherwise.
|
||
* @example
|
||
* isDataURL('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA...'); // true
|
||
*/
|
||
export function isDataURL(str) {
|
||
const regex = /^data:([a-z]+\/[a-z0-9-+.]+(;[a-z-]+=[a-z0-9-]+)*;?)?(base64)?,([a-z0-9!$&',()*+;=\-_%.~:@\/?#]+)?$/i;
|
||
return regex.test(str);
|
||
}
|
||
|
||
export function getCharaFilename(chid) {
|
||
const context = getContext();
|
||
const fileName = context.characters[chid ?? context.characterId].avatar;
|
||
|
||
if (fileName) {
|
||
return fileName.replace(/\.[^/.]+$/, "")
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Extracts words from a string.
|
||
* @param {string} value The string to extract words from.
|
||
* @returns {string[]} The extracted words.
|
||
* @example
|
||
* extractAllWords('Hello, world!'); // ['hello', 'world']
|
||
*/
|
||
export function extractAllWords(value) {
|
||
const words = [];
|
||
|
||
if (!value) {
|
||
return words;
|
||
}
|
||
|
||
const matches = value.matchAll(/\b\w+\b/gim);
|
||
for (let match of matches) {
|
||
words.push(match[0].toLowerCase());
|
||
}
|
||
return words;
|
||
}
|
||
|
||
/**
|
||
* Escapes a string for use in a regular expression.
|
||
* @param {string} string The string to escape.
|
||
* @returns {string} The escaped string.
|
||
* @example
|
||
* escapeRegex('^Hello$'); // '\\^Hello\\$'
|
||
*/
|
||
export function escapeRegex(string) {
|
||
return string.replace(/[/\-\\^$*+?.()|[\]{}]/g, '\\$&');
|
||
}
|
||
|
||
/**
|
||
* Provides an interface for rate limiting function calls.
|
||
*/
|
||
export class RateLimiter {
|
||
/**
|
||
* Creates a new RateLimiter.
|
||
* @param {number} interval The interval in milliseconds.
|
||
* @example
|
||
* const rateLimiter = new RateLimiter(1000);
|
||
* rateLimiter.waitForResolve().then(() => {
|
||
* console.log('Waited 1000ms');
|
||
* });
|
||
*/
|
||
constructor(interval) {
|
||
this.interval = interval;
|
||
this.lastResolveTime = 0;
|
||
this.pendingResolve = Promise.resolve();
|
||
}
|
||
|
||
/**
|
||
* Waits for the remaining time in the interval.
|
||
* @param {AbortSignal} abortSignal An optional AbortSignal to abort the wait.
|
||
* @returns {Promise<void>} A promise that resolves when the remaining time has elapsed.
|
||
*/
|
||
_waitRemainingTime(abortSignal) {
|
||
const currentTime = Date.now();
|
||
const elapsedTime = currentTime - this.lastResolveTime;
|
||
const remainingTime = Math.max(0, this.interval - elapsedTime);
|
||
|
||
return new Promise((resolve, reject) => {
|
||
const timeoutId = setTimeout(() => {
|
||
resolve();
|
||
}, remainingTime);
|
||
|
||
if (abortSignal) {
|
||
abortSignal.addEventListener('abort', () => {
|
||
clearTimeout(timeoutId);
|
||
reject(new Error('Aborted'));
|
||
});
|
||
}
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Waits for the next interval to elapse.
|
||
* @param {AbortSignal} abortSignal An optional AbortSignal to abort the wait.
|
||
* @returns {Promise<void>} A promise that resolves when the next interval has elapsed.
|
||
*/
|
||
async waitForResolve(abortSignal) {
|
||
await this.pendingResolve;
|
||
this.pendingResolve = this._waitRemainingTime(abortSignal);
|
||
|
||
// Update the last resolve time
|
||
this.lastResolveTime = Date.now() + this.interval;
|
||
console.debug(`RateLimiter.waitForResolve() ${this.lastResolveTime}`);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Extracts a JSON object from a PNG file.
|
||
* Taken from https://github.com/LostRuins/lite.koboldai.net/blob/main/index.html
|
||
* Adapted from png-chunks-extract under MIT license
|
||
* @param {Uint8Array} data The PNG data to extract the JSON from.
|
||
* @param {string} identifier The identifier to look for in the PNG tEXT data.
|
||
* @returns {object} The extracted JSON object.
|
||
*/
|
||
export function extractDataFromPng(data, identifier = 'chara') {
|
||
console.log("Attempting PNG import...");
|
||
let uint8 = new Uint8Array(4);
|
||
let uint32 = new Uint32Array(uint8.buffer);
|
||
|
||
//check if png header is valid
|
||
if (!data || data[0] !== 0x89 || data[1] !== 0x50 || data[2] !== 0x4E || data[3] !== 0x47 || data[4] !== 0x0D || data[5] !== 0x0A || data[6] !== 0x1A || data[7] !== 0x0A) {
|
||
console.log("PNG header invalid")
|
||
return null;
|
||
}
|
||
|
||
let ended = false;
|
||
let chunks = [];
|
||
let idx = 8;
|
||
|
||
while (idx < data.length) {
|
||
// Read the length of the current chunk,
|
||
// which is stored as a Uint32.
|
||
uint8[3] = data[idx++];
|
||
uint8[2] = data[idx++];
|
||
uint8[1] = data[idx++];
|
||
uint8[0] = data[idx++];
|
||
|
||
// Chunk includes name/type for CRC check (see below).
|
||
let length = uint32[0] + 4;
|
||
let chunk = new Uint8Array(length);
|
||
chunk[0] = data[idx++];
|
||
chunk[1] = data[idx++];
|
||
chunk[2] = data[idx++];
|
||
chunk[3] = data[idx++];
|
||
|
||
// Get the name in ASCII for identification.
|
||
let name = (
|
||
String.fromCharCode(chunk[0]) +
|
||
String.fromCharCode(chunk[1]) +
|
||
String.fromCharCode(chunk[2]) +
|
||
String.fromCharCode(chunk[3])
|
||
);
|
||
|
||
// The IHDR header MUST come first.
|
||
if (!chunks.length && name !== 'IHDR') {
|
||
console.log('Warning: IHDR header missing');
|
||
}
|
||
|
||
// The IEND header marks the end of the file,
|
||
// so on discovering it break out of the loop.
|
||
if (name === 'IEND') {
|
||
ended = true;
|
||
chunks.push({
|
||
name: name,
|
||
data: new Uint8Array(0)
|
||
});
|
||
break;
|
||
}
|
||
|
||
// Read the contents of the chunk out of the main buffer.
|
||
for (let i = 4; i < length; i++) {
|
||
chunk[i] = data[idx++];
|
||
}
|
||
|
||
// Read out the CRC value for comparison.
|
||
// It's stored as an Int32.
|
||
uint8[3] = data[idx++];
|
||
uint8[2] = data[idx++];
|
||
uint8[1] = data[idx++];
|
||
uint8[0] = data[idx++];
|
||
|
||
|
||
// The chunk data is now copied to remove the 4 preceding
|
||
// bytes used for the chunk name/type.
|
||
let chunkData = new Uint8Array(chunk.buffer.slice(4));
|
||
|
||
chunks.push({
|
||
name: name,
|
||
data: chunkData
|
||
});
|
||
}
|
||
|
||
if (!ended) {
|
||
console.log('.png file ended prematurely: no IEND header was found');
|
||
}
|
||
|
||
//find the chunk with the chara name, just check first and last letter
|
||
let found = chunks.filter(x => (
|
||
x.name == "tEXt"
|
||
&& x.data.length > identifier.length
|
||
&& x.data.slice(0, identifier.length).every((v, i) => String.fromCharCode(v) == identifier[i])));
|
||
|
||
if (found.length == 0) {
|
||
console.log('PNG Image contains no data');
|
||
return null;
|
||
} else {
|
||
try {
|
||
let b64buf = "";
|
||
let bytes = found[0].data; //skip the chara
|
||
for (let i = identifier.length + 1; i < bytes.length; i++) {
|
||
b64buf += String.fromCharCode(bytes[i]);
|
||
}
|
||
let decoded = JSON.parse(atob(b64buf));
|
||
console.log(decoded);
|
||
return decoded;
|
||
} catch (e) {
|
||
console.log("Error decoding b64 in image: " + e);
|
||
return null;
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Sends a base64 encoded image to the backend to be saved as a file.
|
||
*
|
||
* @param {string} base64Data - The base64 encoded image data.
|
||
* @param {string} characterName - The character name to determine the sub-directory for saving.
|
||
* @param {string} ext - The file extension for the image (e.g., 'jpg', 'png', 'webp').
|
||
*
|
||
* @returns {Promise<string>} - Resolves to the saved image's path on the server.
|
||
* Rejects with an error if the upload fails.
|
||
*/
|
||
export async function saveBase64AsFile(base64Data, characterName, filename = "", ext) {
|
||
// Construct the full data URL
|
||
const format = ext; // Extract the file extension (jpg, png, webp)
|
||
const dataURL = `data:image/${format};base64,${base64Data}`;
|
||
|
||
// Prepare the request body
|
||
const requestBody = {
|
||
image: dataURL,
|
||
ch_name: characterName,
|
||
filename: filename
|
||
};
|
||
|
||
// Send the data URL to your backend using fetch
|
||
const response = await fetch('/uploadimage', {
|
||
method: 'POST',
|
||
body: JSON.stringify(requestBody),
|
||
headers: {
|
||
...getRequestHeaders(),
|
||
'Content-Type': 'application/json'
|
||
},
|
||
});
|
||
|
||
// If the response is successful, get the saved image path from the server's response
|
||
if (response.ok) {
|
||
const responseData = await response.json();
|
||
return responseData.path;
|
||
} else {
|
||
const errorData = await response.json();
|
||
throw new Error(errorData.error || 'Failed to upload the image to the server');
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Creates a thumbnail from a data URL.
|
||
* @param {string} dataUrl The data URL encoded data of the image.
|
||
* @param {number} maxWidth The maximum width of the thumbnail.
|
||
* @param {number} maxHeight The maximum height of the thumbnail.
|
||
* @returns {Promise<string>} A promise that resolves to the thumbnail data URL.
|
||
*/
|
||
export function createThumbnail(dataUrl, maxWidth, maxHeight) {
|
||
return new Promise((resolve, reject) => {
|
||
const img = new Image();
|
||
img.src = dataUrl;
|
||
img.onload = () => {
|
||
const canvas = document.createElement('canvas');
|
||
const ctx = canvas.getContext('2d');
|
||
|
||
// Calculate the thumbnail dimensions while maintaining the aspect ratio
|
||
const aspectRatio = img.width / img.height;
|
||
let thumbnailWidth = maxWidth;
|
||
let thumbnailHeight = maxHeight;
|
||
|
||
if (img.width > img.height) {
|
||
thumbnailHeight = maxWidth / aspectRatio;
|
||
} else {
|
||
thumbnailWidth = maxHeight * aspectRatio;
|
||
}
|
||
|
||
// Set the canvas dimensions and draw the resized image
|
||
canvas.width = thumbnailWidth;
|
||
canvas.height = thumbnailHeight;
|
||
ctx.drawImage(img, 0, 0, thumbnailWidth, thumbnailHeight);
|
||
|
||
// Convert the canvas to a data URL and resolve the promise
|
||
const thumbnailDataUrl = canvas.toDataURL('image/jpeg');
|
||
resolve(thumbnailDataUrl);
|
||
};
|
||
|
||
img.onerror = () => {
|
||
reject(new Error('Failed to load the image.'));
|
||
};
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Waits for a condition to be true. Throws an error if the condition is not true within the timeout.
|
||
* @param {{ (): boolean; }} condition The condition to wait for.
|
||
* @param {number} [timeout=1000] The timeout in milliseconds.
|
||
* @param {number} [interval=100] The interval in milliseconds.
|
||
* @returns {Promise<void>} A promise that resolves when the condition is true.
|
||
*/
|
||
export async function waitUntilCondition(condition, timeout = 1000, interval = 100) {
|
||
return new Promise((resolve, reject) => {
|
||
const timeoutId = setTimeout(() => {
|
||
clearInterval(intervalId);
|
||
reject(new Error('Timed out waiting for condition to be true'));
|
||
}, timeout);
|
||
|
||
const intervalId = setInterval(() => {
|
||
if (condition()) {
|
||
clearTimeout(timeoutId);
|
||
clearInterval(intervalId);
|
||
resolve();
|
||
}
|
||
}, interval);
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Returns a UUID v4 string.
|
||
* @returns {string} A UUID v4 string.
|
||
* @example
|
||
* uuidv4(); // '3e2fd9e1-0a7a-4f6d-9aaf-8a7a4babe7eb'
|
||
*/
|
||
export function uuidv4() {
|
||
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
|
||
const r = Math.random() * 16 | 0;
|
||
const v = c === 'x' ? r : (r & 0x3 | 0x8);
|
||
return v.toString(16);
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Clones an object using JSON serialization.
|
||
* @param {any} obj The object to clone.
|
||
* @returns {any} A deep clone of the object.
|
||
*/
|
||
export function deepClone(obj) {
|
||
return JSON.parse(JSON.stringify(obj));
|
||
}
|