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/* eslint-disable no-useless-escape */
window.CUSDIS = {}
let cusdisIframe
function createIframe(targetElement) {
if (!cusdisIframe) {
cusdisIframe = document.createElement('iframe')
setupIframe(cusdisIframe, targetElement)
}
cusdisIframe.srcdoc = generateIframeContent(targetElement)
cusdisIframe.style.width = '100%'
cusdisIframe.style.border = '0'
}
function setupIframe(iframe, targetElement) {
const colorSchemeMediaQuery = window.matchMedia('(prefers-color-scheme: dark)')
const messageHandler = event => {
try {
const message = JSON.parse(event.data)
if (message.from === 'cusdis') {
switch (message.event) {
case 'onload':
if (targetElement.dataset.theme === 'auto') {
setTheme(colorSchemeMediaQuery.matches ? 'dark' : 'light')
}
break
case 'resize':
iframe.style.height = message.data + 'px'
break
}
}
} catch (error) {}
}
const colorSchemeChangeHandler = e => {
const isDarkMode = e.matches
if (targetElement.dataset.theme === 'auto') {
setTheme(isDarkMode ? 'dark' : 'light')
}
}
window.addEventListener('message', messageHandler)
colorSchemeMediaQuery.addEventListener('change', colorSchemeChangeHandler)
}
function generateIframeContent(element) {
const cusdisHost = element.dataset.host || 'https://cusdis.com'
const iframeSrc = element.dataset.iframe || `${cusdisHost}/js/iframe.umd.js`
return `<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="${cusdisHost}/js/style.css">
<base target="_parent" />
<link>
<script>
window.CUSDIS_LOCALE = ${JSON.stringify(window.CUSDIS_LOCALE)}
window.__DATA__ = ${JSON.stringify(element.dataset)}
<\/script>
<style>
:root {
color-scheme: light;
}
</style>
</head>
<body>
<div id="root"></div>
<script src="${iframeSrc}" type="module">
<\/script>
</body>
</html>`
}
function setTheme(theme, data) {
if (cusdisIframe) {
cusdisIframe.contentWindow.postMessage(JSON.stringify({ from: 'cusdis', event: theme, data: data }))
}
}
function renderTo(element) {
if (element) {
element.innerHTML = ''
createIframe(element)
element.appendChild(cusdisIframe)
}
}
function initialRender() {
let element
if (window.cusdisElementId) {
element = document.querySelector(`#${window.cusdisElementId}`)
} else if (document.querySelector('#cusdis_thread')) {
element = document.querySelector('#cusdis_thread')
} else if (document.querySelector('#cusdis')) {
console.warn('id `cusdis` is deprecated. Please use `cusdis_thread` instead')
element = document.querySelector('#cusdis')
}
if (!window.CUSDIS_PREVENT_INITIAL_RENDER && element) {
renderTo(element)
}
}
window.renderCusdis = renderTo
window.CUSDIS.renderTo = renderTo
window.CUSDIS.setTheme = setTheme
window.CUSDIS.initial = initialRender
initialRender()
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