add day 90
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294
day90/src/lib/router/hydrationManager.ts
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294
day90/src/lib/router/hydrationManager.ts
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import { getAppState } 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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// 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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const appState = await 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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hydrateHeadElements(appState);
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hydrateIfAttributes(appState);
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hydrateAnchorElements(reduceJavascript);
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// interactive hydration
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hydrateBindElements(appState, documentBody);
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hydrateElements(appState);
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// Update app state items with input values from elements with the "d-model" attribute.
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// Similar to Vue.js' v-model attribute.
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hydrateModelAttributes(appState);
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}
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export function ReactifyTemplate(appState: Reactive) {
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const spanElements = Array.from(document.querySelectorAll('span'));
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spanElements.forEach(spanElement => {
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// Get all attributes that start with "data-token-"
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const reactiveElms = Array.from(spanElement.attributes).filter(attr => attr.name.startsWith('data-token-'));
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if (reactiveElms.length === 0) return;
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reactiveElms.forEach(reactiveElm => {
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const attributeName = reactiveElm.name;
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const uuid = attributeName.split('data-token-')[1];
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// If the uuid is not found, throw an error
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if (!uuid) throw new Error('Internal error: decoded uuid not found');
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// Decode the uuid
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let decodedUuid = '';
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for (let i = 0; i < uuid.length; i += 2) {
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decodedUuid += String.fromCharCode(parseInt(uuid.substr(i, 2), 16));
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}
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// If the span element's parent has the "d-once" attribute, remove it and return since we're only doing it once
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if (spanElement.parentElement?.hasAttribute('d-once')) {
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spanElement.parentElement.removeAttribute('d-once');
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return;
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}
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// If the span element's parent has the "d-html" attribute, listen to the decoded uuid
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// and set the span element's innerHTML to the change value
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if (spanElement.parentElement?.hasAttribute('d-html')) {
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appState.listen(decodedUuid, (change: string) => spanElement.innerHTML = change);
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return;
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}
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appState.listen(decodedUuid, (change: string | null) => spanElement.textContent = change);
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});
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});
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}
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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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if (conditionalElms.length === 0) return;
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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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let currentElm = e;
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// recursively check for subsequent elements with the d-else of d-else-if attribute
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while (currentElm.nextElementSibling) {
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const nextElm = currentElm.nextElementSibling;
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if (nextElm.getAttribute('d-else-if') !== null) {
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siblingConditionalElms.push(nextElm);
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} else if (nextElm.getAttribute('d-else') !== null) {
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siblingConditionalElms.push(nextElm);
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break;
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}
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currentElm = nextElm;
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}
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if (siblingConditionalElms == undefined) return;
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const resetHTML = () => {
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e.innerHTML = '<!-- d-if -->';
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siblingConditionalElms.forEach((elm) => {
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elm.innerHTML = '<!-- d-if -->';
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});
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};
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let ifStatement = `if (${condition}) {
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e.innerHTML = "${e.innerHTML}"
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} `;
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siblingConditionalElms.forEach((element, i) => {
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const siblingHTML = element.innerHTML;
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element.innerHTML = '<!-- d-if -->';
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let statementDirective = 'else';
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element.removeAttribute('d-else');
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if (element.hasAttribute('d-else-if')) statementDirective = 'else if';
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const condition = element.getAttribute('d-' + statementDirective.split(' ').join('-'));
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if (statementDirective == 'else if') {
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statementDirective = `else if (${condition})`;
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element.removeAttribute('d-else-if');
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}
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ifStatement = `${ifStatement} ${statementDirective} {
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siblingConditionalElms[${i}].innerHTML = "${siblingHTML}"
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}`;
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});
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e.removeAttribute('d-if');
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if (!condition) return;
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resetHTML();
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eval(ifStatement);
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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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});
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}
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export function hydrateElements(appState: Reactive) {
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const elements = Array.from(document.getElementById('app').querySelectorAll('*'));
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const eventElements = elements.filter((e) => {
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return Array.from(e.attributes).some(attr => attr.name.startsWith('d-on:'));
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});
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eventElements.forEach((e) => {
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const dOnAttrs = Array.from(e.attributes).filter(attr => attr.name.startsWith('d-on:'));
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dOnAttrs.forEach((attr) => {
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const [eventType, ...modifiers] = attr.name.split(':')[1].split('.');
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const code = attr.value;
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const isKeyboardEvent = (eventType.startsWith('key')) ? true : false;
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const keyName = (isKeyboardEvent && modifiers[0]) ? modifiers[0].charAt(0).toUpperCase() + modifiers[0].slice(1).toLowerCase() : '';
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e.removeAttribute(attr.name);
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e.addEventListener(eventType, (event) => {
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let eventKey = event.key;
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if (isKeyboardEvent && eventKey === ' ') {
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eventKey = 'Space';
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}
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const firstLetter = eventKey.split('')[0];
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eventKey = firstLetter?.toUpperCase() + eventKey.slice(1).toLowerCase();
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for (let i = 0; i < modifiers.length; i++) {
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const modifier = modifiers[i];
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if (modifier === 'stop') {
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event.stopPropagation();
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}
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if (modifier === 'prevent') {
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event.preventDefault();
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}
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if (modifier === 'self') {
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if (e !== event.target) return;
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}
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}
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if (!isKeyboardEvent || !keyName) {
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eval(code);
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} else if (eventKey === keyName) {
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eval(code);
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}
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}, { once: modifiers.some(mod => mod === 'once'), capture: modifiers.some(mod => mod === 'capture'), passive: modifiers.some(mod => mod === 'passive') });
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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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if (modelElms.length === 0) return;
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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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if (headElements.length === 0) return;
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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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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 async function hydrateAnchorElements(reduceJavascript: boolean) {
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const anchorElms = document.querySelectorAll('a');
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Array.from(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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function hydrateBindElements(appState: Reactive, rootElement: Element) {
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const bindRegex = /^(?:d-bind:|:)/;
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Array.from(rootElement.querySelectorAll('*')).forEach((e: Element) => {
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const bindElms = Array.from(e.attributes).filter((arrElm: Attr) => {
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return bindRegex.test(arrElm.name);
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});
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if (bindElms.length === 0) return;
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bindElms.forEach((attr: Attr) => {
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const keyName = attr.name.split(':')[1];
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const originalValue = '(' + attr.value + ')';
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let currentBinding = '';
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e.removeAttribute(attr.name);
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function setAttribute() {
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if (!keyName) return;
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let value = 'return "' + originalValue + '"';
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const attribute = e.getAttribute(keyName);
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if (value.includes('(') || value.includes(')') || value.includes('?') || value.includes(':')) {
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value = eval(originalValue);
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}
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if (!value || !attribute) return;
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if (attribute) {
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const originalAttributeValue = (attribute.toString()).split(`${currentBinding}`).join('');
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currentBinding = value;
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value = originalAttributeValue + ' ' + value;
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}
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e.setAttribute(keyName, value);
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}
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if (originalValue.includes('appState')) {
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originalValue.split(' ').forEach((value) => {
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const propName = value.split('appState.contents.')[1];
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if (!propName || !value.includes('appState')) return;
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appState.listen(propName.replace(')', ''), () => setAttribute());
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});
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}
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setAttribute();
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});
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});
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}
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