276 lines
9.5 KiB
TypeScript
276 lines
9.5 KiB
TypeScript
import { getAppState, initAppState } from '../../main';
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import { renderPage } from './pageRenderer';
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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import { getCookie, setCookie } from '../cookieManager';
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import { Reactive } from '../ReactiveObject';
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export let ctrlPressed = false;
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export function setCtrl(ctrl: boolean) {
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ctrlPressed = ctrl;
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}
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// function to turn the template into reactive content "hydating" a page
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export async function hydratePage(reduceJavascript?: boolean){
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if (import.meta.env.SSR) return;
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if (reduceJavascript === undefined) reduceJavascript = false;
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await initAppState();
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const appState = getAppState();
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const documentBody = document.getElementById('app');
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if (!documentBody) {
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throw new Error('Fatal Error: element with id app not found');
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}
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ReactifyTemplate(appState);
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// here we look for elements with the d-on:click attribute and on click run the function in the attribute
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hydrateElement('*[d-on:click]', appState, 'click');
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// here we determine if an element should be deleted form the DOM via the d-if directive
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hydrateIfAttributes(appState);
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hydrateElement('*[d-on:pointerEnter]', appState, 'pointerenter');
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hydrateElement('*[d-on:pointerExit]', appState, 'pointerleave');
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hydrateElement('*[d-on:mouseDown]', appState, 'mousedown');
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hydrateElement('*[d-on:mouseUp]', appState, 'mouseup');
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// here we look for elements with the d-model attribute and if there is any input in the element then we update the appState item with the name
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// of the attribute value
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// example: if the user types "hello" into a text field with the d-model attribute of "text" then we update the appState item with the name "text"
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// to "hello"
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// similar to vue.js v-model attribute
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hydrateModelAttributes(appState);
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hydrateHeadElements(appState);
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hydrateAnchorElements(reduceJavascript);
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hydrateKeyDown(appState);
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}
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export function ReactifyTemplate(appState: Reactive) {
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// for every item in the appState lets check for any element with the "checksum", a hex code equivalent of the item name
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Object.keys(appState.contents).forEach((e: string) => {
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if (e === undefined) return;
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// here we check for elements with the name of "data-token-<hex code of the item name>"
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const uuid = e.split('').map((c: string) => c.charCodeAt(0).toString(16).padStart(2, '0')).join('');
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const listeningElements = document.querySelectorAll(`[${'data-token-' + uuid}]`);
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listeningElements.forEach((elm) => {
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if (elm.parentElement?.getAttribute('d-once') !== null) {
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elm.parentElement?.removeAttribute('d-once');
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return;
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}
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if (elm.parentElement?.getAttribute('d-html') !== null) {
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appState.listen(e, (change: string) => elm.innerHTML = change);
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elm.parentElement?.removeAttribute('d-html');
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} else {
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appState.listen(e, (change: string) => elm.textContent = change);
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}
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});
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});
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}
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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export function hydrateIfAttributes(appState: Reactive) {
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const conditionalElms = Array.from(document.querySelectorAll('*[d-if]'));
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conditionalElms.forEach(async (e: Element) => {
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const condition = e.getAttribute('d-if');
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const siblingConditionalElms: Array<Element> = [];
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// recursively check for subsequent elements with the d-else of d-else-if attribute
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function checkForConditionSibling(elm: Element) {
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if (!elm.nextElementSibling || typeof elm.nextElementSibling == 'undefined') return;
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if (elm.nextElementSibling?.getAttribute('d-else-if') !== null) {
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siblingConditionalElms.push(elm.nextElementSibling);
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if (!elm.nextElementSibling) return;
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checkForConditionSibling(elm.nextElementSibling);
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}
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if (elm.nextElementSibling?.getAttribute('d-else') !== null) {
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siblingConditionalElms.push(elm.nextElementSibling);
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}
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}
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checkForConditionSibling(e);
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if (siblingConditionalElms == undefined) return;
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function resetHTML() {
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e.innerHTML = '<!-- d-if -->';
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for (let i = 0; i < siblingConditionalElms.length; i++) {
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const element = siblingConditionalElms[i];
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if (!element) return;
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element.innerHTML = '<!-- d-if -->';
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}
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}
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let ifStatement = `if (!!eval(condition)) {
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e.innerHTML = originalHTML
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} `;
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for (let i = 0; i < siblingConditionalElms.length; i++) {
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const element = siblingConditionalElms[i];
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if (!element) return;
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const originHTML = element.innerHTML;
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element.innerHTML = '<!-- d-if -->';
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let statementDirective = 'else';
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if (element.getAttribute('d-else-if') !== null) {
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statementDirective = 'else if';
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}
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const condition = eval('element.getAttribute(\'d-\' + statementDirective.split(\' \').join(\'-\'))');
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if (statementDirective == 'else if') {
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statementDirective = 'else if (' + condition + ')';
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}
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ifStatement = ifStatement + statementDirective + `{
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siblingConditionalElms[${i}].innerHTML = "${originHTML}"
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}`;
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}
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e.removeAttribute('d-if');
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const originalHTML = e.innerHTML;
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if (!condition || originalHTML == undefined) return;
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resetHTML();
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if (condition.includes('appState.contents.')) {
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let reactiveProp: Array<string> | string | null | undefined = /appState\.contents\.[a-zA-Z]+/.exec(condition);
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if (!reactiveProp || !reactiveProp[0]) return;
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reactiveProp = reactiveProp[0].split('.')[2];
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if (!reactiveProp) return;
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appState.listen(reactiveProp, () => {
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resetHTML();
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eval(ifStatement);
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});
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}
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eval(ifStatement);
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});
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}
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export function hydrateElement(querySelector: string, appState: Reactive, eventListenerName: string, removeAttribute?: boolean) {
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const queryName: Array<string> | null = /(?<=\[).+?(?=\])/.exec(querySelector);
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if (!queryName || !queryName[0]) return;
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const querySelectorAll = (querySelector.replace(':', '\\\\3A '));
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querySelector = queryName[0];
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const elms = eval(`Array.from(document.querySelectorAll('${querySelectorAll.toString()}'));`);
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if (Array.from(elms).length === 0) return;
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elms.forEach((e: Element) => {
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const hydrationFunction = e.getAttribute(`${querySelector}`);
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if (removeAttribute === undefined || removeAttribute === true) {
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e.removeAttribute(`${querySelector}`);
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}
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if (!hydrationFunction) return;
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e.addEventListener(eventListenerName, () => {
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eval(hydrationFunction);
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});
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});
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}
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export function hydrateModelAttributes(appState: Reactive) {
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const modelElms = Array.from(document.querySelectorAll('input[d-model], textarea[d-model]'));
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modelElms.forEach((e: Element) => {
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const modelName = e.getAttribute('d-model');
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if (!modelName) return;
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e.addEventListener('input', (input: Event) => {
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const target = input.target as HTMLInputElement;
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appState.contents[modelName] = target.value;
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});
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});
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}
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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export function hydrateHeadElements(appState: Reactive) {
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const headContent = document.head.innerHTML;
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const headElements = Array.from(document.querySelectorAll('devto\\3A head'));
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headElements.forEach((e: Element) => {
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if (e.childNodes.length == 0) return;
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e.childNodes.forEach((elm) => {
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const child = elm as Element;
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if (child.nodeType !== 1) return;
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if (!document.head.querySelectorAll(child.tagName)) return;
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const uniqueAttributes = ['content', 'href'];
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document.head.querySelectorAll(child.tagName).forEach((headEl: Element) => {
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if (headEl.attributes.length == 0) {
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headEl.remove();
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}
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for (let i = 0; i < headEl.attributes.length; i++) {
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if (!headEl.attributes.item(i)) return;
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const itemName = headEl.attributes.item(i)?.name;
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if (!itemName) return;
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if (uniqueAttributes.indexOf(itemName) == -1) {
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if (child.attributes.getNamedItem(itemName)?.nodeValue == headEl.attributes.item(i)?.nodeValue) {
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headEl.remove();
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}
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}
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}
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});
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document.head.appendChild(child);
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});
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e.remove();
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});
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document.addEventListener('router:naviagte', () => {
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document.head.innerHTML = headContent;
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}, { once: true });
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}
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export function hydrateAnchorElements(reduceJavascript: boolean) {
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const anchorElms = Array.from(document.querySelectorAll('a'));
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anchorElms.forEach((e: HTMLAnchorElement) => {
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if (!reduceJavascript && e.href === window.location.href) {
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e.setAttribute('link:active', '');
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e.setAttribute('tabindex', '-1');
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}
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e.addEventListener('click', async (click: MouseEvent) => {
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if (!event || click.ctrlKey) return;
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const target = click.target as HTMLElement;
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event.preventDefault();
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if (!target) return;
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const url: string | null = target.getAttribute('href');
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if (!url) return;
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await renderPage(url);
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});
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});
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}
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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export function hydrateKeyDown(appState: Reactive) {
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Array.from(document.body.querySelectorAll('*')).forEach((e) => {
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for (let i = 0; i < e.attributes.length; i++) {
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const item = e.attributes.item(i)?.name;
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if (!item) return;
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if (item.startsWith('d-on:keydown')) {
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const key = item.split('.')[1]?.toLowerCase();
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let correctedKey = '';
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if (key && key?.length > 0) {
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key.split('').forEach((e, i, arr) => {
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if (i === 0) {
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arr[i] = e.toUpperCase();
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}
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correctedKey += arr[i];
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});
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}
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e.addEventListener('keydown', (keydown) => {
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const keyboardEvent = <KeyboardEvent>keydown;
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let keyName = keyboardEvent.key;
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if (keyName === ' ') {
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keyName = 'Space';
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}
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const firstLetter = keyName.split('')[0];
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keyName = firstLetter?.toUpperCase() + keyName.slice(1);
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if (keyName == correctedKey) {
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const itemCode = e.getAttribute(item);
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if (!itemCode) return;
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eval(itemCode);
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}
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});
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}
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}
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});
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} |