//#region src/utils/html.ts
/**
* @module
* HTML utility.
*/
const HtmlEscapedCallbackPhase = {
	Stringify: 1,
	BeforeStream: 2,
	Stream: 3
};
const raw = (value, callbacks) => {
	const escapedString = new String(value);
	escapedString.isEscaped = true;
	escapedString.callbacks = callbacks;
	return escapedString;
};
const escapeRe = /[&<>'"]/;
const stringBufferToString = async (buffer, callbacks) => {
	let str = "";
	callbacks ||= [];
	const resolvedBuffer = await Promise.all(buffer);
	for (let i = resolvedBuffer.length - 1;; i--) {
		str += resolvedBuffer[i];
		i--;
		if (i < 0) break;
		let r = resolvedBuffer[i];
		if (typeof r === "object") callbacks.push(...r.callbacks || []);
		const isEscaped = r.isEscaped;
		r = await (typeof r === "object" ? r.toString() : r);
		if (typeof r === "object") callbacks.push(...r.callbacks || []);
		if (r.isEscaped ?? isEscaped) str += r;
		else {
			const buf = [str];
			escapeToBuffer(r, buf);
			str = buf[0];
		}
	}
	return raw(str, callbacks);
};
const escapeToBuffer = (str, buffer) => {
	const match = str.search(escapeRe);
	if (match === -1) {
		buffer[0] += str;
		return;
	}
	let escape;
	let index;
	let lastIndex = 0;
	for (index = match; index < str.length; index++) {
		switch (str.charCodeAt(index)) {
			case 34:
				escape = "&quot;";
				break;
			case 39:
				escape = "&#39;";
				break;
			case 38:
				escape = "&amp;";
				break;
			case 60:
				escape = "&lt;";
				break;
			case 62:
				escape = "&gt;";
				break;
			default: continue;
		}
		buffer[0] += str.substring(lastIndex, index) + escape;
		lastIndex = index + 1;
	}
	buffer[0] += str.substring(lastIndex, index);
};
const resolveCallbackSync = (str) => {
	const callbacks = str.callbacks;
	if (!callbacks?.length) return str;
	const buffer = [str];
	const context = {};
	callbacks.forEach((c) => c({
		phase: HtmlEscapedCallbackPhase.Stringify,
		buffer,
		context
	}));
	return buffer[0];
};
const resolveCallback = async (str, phase, preserveCallbacks, context, buffer) => {
	if (typeof str === "object" && !(str instanceof String)) {
		if (!(str instanceof Promise)) str = str.toString();
		if (str instanceof Promise) str = await str;
	}
	const callbacks = str.callbacks;
	if (!callbacks?.length) return Promise.resolve(str);
	if (buffer) buffer[0] += str;
	else buffer = [str];
	const resStr = Promise.all(callbacks.map((c) => c({
		phase,
		buffer,
		context
	}))).then((res) => Promise.all(res.filter(Boolean).map((str) => resolveCallback(str, phase, false, context, buffer))).then(() => buffer[0]));
	if (preserveCallbacks) return raw(await resStr, callbacks);
	else return resStr;
};
//#endregion
export { HtmlEscapedCallbackPhase, escapeToBuffer, raw, resolveCallback, resolveCallbackSync, stringBufferToString };