// ==UserScript==
// @name               TabBusca
// @namespace          https://raw.githubusercontent.com/ludwiklejzer/TabBusca
// @description        Add a search bar to tabnews.com.br
// @description:pt-BR  Adiciona uma barra de busca ao tabnews.com.br
// @author             Ludwik Lejzer (https://github.com/ludwiklejzer)
// @icon               https://www.tabnews.com.br/favicon-light.png
// @homepageURL        https://github.com/ludwiklejzer/TabBusca
// @version            0.3.1
// @match              *://*.tabnews.com.br/*
// @updateURL          https://raw.githubusercontent.com/ludwiklejzer/TabBusca/main/tabbusca.user.js
// @downloadURL        https://raw.githubusercontent.com/ludwiklejzer/TabBusca/main/tabbusca.user.js
// @supportURL         https://raw.githubusercontent.com/ludwiklejzer/TabBusca/issues
// @license            MIT
// ==/UserScript==

// options: "allOrigins" or "corsAnywhere"
let proxy = "allOrigins";

window.addEventListener("load", () => {
	"use strict";

	loadScript();

	// configure to observe if the #header changed
	const observer = new MutationObserver(function (mutations) {
		mutations.forEach(function (mutation) {
			if (mutation.type === "childList") {
				mutation.removedNodes.forEach(function (node) {
					if (node.id === "header") {
						loadScript();
					}
				});
			}
		});
	});

	// start observing the document for changings
	observer.observe(document.body, {
		childList: true,
		subtree: true,
	});
});

function loadScript() {
	const header = document.querySelector("#header");
	const perfilOptionsBtn = header.childNodes[5];
	const container = document.createElement("div");
	container.setAttribute("id", "search-container");
	header.insertBefore(container, header.childNodes[5]);

	// create and load basic html elements
	createElement("form", { id: "search-form" }, "#search-container");
	createElement("div", { id: "search-icon" }, "#search-form");
	createElement(
		"input",
		{
			id: "search-input",
			type: "search",
			placeholder: "Sobre o que deseja buscar?",
			autofocus: true,
		},
		"#search-form"
	);
	createElement("ul", { id: "results" }, "#search-container");
	const form = document.querySelector("#search-form");
	const input = document.querySelector("#search-input");
	const list = document.querySelector("#results");
	const searchIcon = document.querySelector("#search-icon");
	const svgIcon = `<svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" stroke="#ffffff" > <g id="SVGRepo_bgCarrier" stroke-width="0"></g> <g id="SVGRepo_tracerCarrier" stroke-linecap="round" stroke-linejoin="round" ></g> <g id="SVGRepo_iconCarrier"> <path d="M15 15L21 21" stroke="#ffffff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" ></path> <path d="M17 10C17 13.866 13.866 17 10 17C6.13401 17 3 13.866 3 10C3 6.13401 6.13401 3 10 3C13.866 3 17 6.13401 17 10Z" stroke="#ffffff" stroke-width="2" ></path> </g> </svg>`;
	searchIcon.innerHTML = svgIcon;

	// set styles
	setCss("#search-container", {
		display: "flex",
		marginRight: perfilOptionsBtn ? "8px" : "0px",
		position: "relative",
	});
	setCss("#search-icon svg", {
		display: "flex",
		width: "27px",
		marginRight: "10px",
		cursor: "pointer",
	});
	setCss("#search-form", { display: "flex", marginLeft: "10px" });
	setCss("#search-input", {
		outline: "none",
		border: "none",
		borderRadius: "5px",
		padding: "5px",
		width: "0px",
		opacity: "0",
		transition: ".6s all",
		marginRight: "-10px",
		zIndex: "-1",
	});

	setCss("#results", {
		position: "absolute",
		top: "35px",
		right: "0",
		backgroundColor: " #ffffff",
		margin: "0",
		padding: "0",
		maxHeight: "300px",
		overflow: "auto",
		borderRadius: "12px",
		boxShadow:
			"rgb(27 31 36 / 12%) 0px 1px 3px, rgb(66 74 83 / 12%) 0px 8px 24px",
		width: "300px",
		transition: ".6s all",
		opacity: "0",
		zIndex: "-1",
	});

	form.addEventListener("submit", (event) => {
		event.preventDefault();
		list.innerHTML = "";

		setSpinner("on");

		setCss("#search-input", {
			opacity: "1",
			width: "300px",
			zIndex: "1",
		});

		setCss("#results", {
			width: "300px",
			opacity: "1",
			zIndex: "1",
		});

		getData(input.value);
	});

	searchIcon.addEventListener("click", () => {
		setCss("#search-input", {
			display: "block",
			opacity: "1",
			zIndex: "1",
			width: "300px",
			marginRight: "0px",
		});

		setCss("#results", {
			opacity: "1",
			zIndex: "1",
		});
		input.focus();
	});

	input.addEventListener("focusout", () => {
		setCss("#search-input", {
			opacity: "0",
			width: "0px",
			marginRight: "-10px",
			zIndex: "-1",
		});
		setCss("#results", {
			opacity: "0",
			zIndex: "-1",
		});
	});

	function setCss(identifier, property) {
		const elements = document.querySelectorAll(identifier);

		Array.from(elements).map((element) => {
			Object.assign(element.style, property);
		});
	}

	function createElement(tag, attributes, parent) {
		const element = document.createElement(tag);

		if (Object.keys(attributes).length > 0) {
			for (const name in attributes) {
				element.setAttribute(name, attributes[name]);
			}
		}

		if (parent) {
			const parentNode = document.querySelector(parent);
			parentNode.appendChild(element);
		}
	}

	function setSpinner(state) {
		if (state === "on") {
			createElement("span", { id: "search-spinner" }, "#results");
			const spinner = document.querySelector("#search-spinner");

			setCss("#results", { minHeight: "100px" });
			setCss("#search-spinner", {
				width: "40px",
				height: "40px",
				border: "4px solid #fff",
				borderRadius: "50%",
				borderTopColor: "#3498db",
				position: "absolute",
				top: "0",
				bottom: "0",
				left: "0",
				right: "0",
				margin: "auto",
				display: "block",
			});

			spinner.animate(
				[
					{ transform: "rotate(0deg)" },
					{ transform: "rotate(360deg)" },
				],
				{ duration: 1000, iterations: Infinity }
			);
		} else {
			setCss("#search-spinner", { display: "none" });
			setCss("#results", { minHeight: "0px" });
		}
	}

	function setVisitedEffect(element) {
		let savedLinks = localStorage.getItem("links");
		savedLinks = savedLinks ? savedLinks.split(",") : new Array();
		let isLinkSaved = savedLinks.includes(element.href);

		if (!isLinkSaved) {
			savedLinks.push(element.href);
			localStorage.setItem("links", savedLinks);
			getVisitedEffect(element);
		}
	}

	function getVisitedEffect(element) {
		let savedLinks = localStorage.getItem("links");

		savedLinks = savedLinks ? savedLinks.split(",") : new Array();
		for (const savedLink of savedLinks) {
			if (element.href === savedLink) {
				element.style.opacity = "0.6";
			}
		}
	}

	function parseData(data) {
		let html = data;

		if (proxy === "allOrigins") {
			html = JSON.parse(html).contents;
		}

		const parser = new DOMParser();
		const doc = parser.parseFromString(html, "text/html");
		const h3s = doc.querySelectorAll("h3");

		// h3s.forEach(function (h3) {
		for (let i = 0; i < h3s.length - 1; i++) {
			const title = h3s[i].textContent;
			const regexOnlyPosts = /https*:\/\/www\.tabnews\.com\.br\/.+\/.+/; // get only posts
			let link = h3s[i].parentNode.href;

			if (proxy === "allOrigins") {
				link = h3s[i].parentNode.parentNode.parentNode.href;
				const regexFilterLink = /.+=(.+)&sa=/; // retrieve only the true link
				link = link.match(regexFilterLink)[1];
			}

			if (regexOnlyPosts.test(link)) {
				const li = document.createElement("li");
				const a = document.createElement("a");
				a.innerText = title;
				a.href = link;
				a.onmouseover = () => {
					a.style.textDecoration = "underline";
				};
				a.onmouseout = () => {
					a.style.textDecoration = "none";
				};
				a.onclick = () => {
					setVisitedEffect(a);
				};
				getVisitedEffect(a);

				li.appendChild(a);
				list.appendChild(li);
			}
		}

		if (list.children.length <= 1) {
			const li = document.createElement("li");
			const a = document.createElement("a");
			a.innerText = "Nenhum resultado encontrado";
			a.href = "";
			li.appendChild(a);
			list.appendChild(li);
		}

		setCss("#results li", {
			listStyleType: "none",
			borderBottom: "1px solid #24292f14",
		});
		setCss("#results a", {
			textDecoration: "none",
			color: "#24292f",
			padding: "10px 15px",
			display: "block",
		});
	}

	function getData(userInput) {
		let input = removeDiacritics(userInput);
		const url = `https://www.google.com/search?q=inurl%3Atabnews.com.br+inurl%3A${input}&num=50`;
		let proxyUrl;

		if (proxy === "allOrigins") {
			proxyUrl = "https://api.allorigins.win/get?url=";
		} else {
			proxyUrl = "https://cors-anywhere.herokuapp.com/";
		}

		fetch(proxyUrl + url)
			.then(function (response) {
				if (response.ok) {
					return response.text();
				} else {
					throw new Error("Error loading the page.");
				}
			})
			.then(function (data) {
				setSpinner("off");
				parseData(data);
			})
			.catch(function (error) {
				setSpinner("off");
				console.error(error);
			});
	}

	function removeDiacritics(str) {
		const defaultDiacriticsRemovalMap = [
			{
				base: "A",
				letters:
					/[\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F]/g,
			},
			{ base: "AA", letters: /[\uA732]/g },
			{ base: "AE", letters: /[\u00C6\u01FC\u01E2]/g },
			{ base: "AO", letters: /[\uA734]/g },
			{ base: "AU", letters: /[\uA736]/g },
			{ base: "AV", letters: /[\uA738\uA73A]/g },
			{ base: "AY", letters: /[\uA73C]/g },
			{
				base: "B",
				letters:
					/[\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181]/g,
			},
			{
				base: "C",
				letters:
					/[\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E]/g,
			},
			{
				base: "D",
				letters:
					/[\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779]/g,
			},
			{ base: "DZ", letters: /[\u01F1\u01C4]/g },
			{ base: "Dz", letters: /[\u01F2\u01C5]/g },
			{
				base: "E",
				letters:
					/[\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E]/g,
			},
			{ base: "F", letters: /[\u0046\u24BB\uFF26\u1E1E\u0191\uA77B]/g },
			{
				base: "G",
				letters:
					/[\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E]/g,
			},
			{
				base: "H",
				letters:
					/[\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D]/g,
			},
			{
				base: "I",
				letters:
					/[\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197]/g,
			},
			{ base: "J", letters: /[\u004A\u24BF\uFF2A\u0134\u0248]/g },
			{
				base: "K",
				letters:
					/[\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2]/g,
			},
			{
				base: "L",
				letters:
					/[\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780]/g,
			},
			{ base: "LJ", letters: /[\u01C7]/g },
			{ base: "Lj", letters: /[\u01C8]/g },
			{
				base: "M",
				letters: /[\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C]/g,
			},
			{
				base: "N",
				letters:
					/[\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4]/g,
			},
			{ base: "NJ", letters: /[\u01CA]/g },
			{ base: "Nj", letters: /[\u01CB]/g },
			{
				base: "O",
				letters:
					/[\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C]/g,
			},
			{ base: "OI", letters: /[\u01A2]/g },
			{ base: "OO", letters: /[\uA74E]/g },
			{ base: "OU", letters: /[\u0222]/g },
			{
				base: "P",
				letters:
					/[\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754]/g,
			},
			{ base: "Q", letters: /[\u0051\u24C6\uFF31\uA756\uA758\u024A]/g },
			{
				base: "R",
				letters:
					/[\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782]/g,
			},
			{
				base: "S",
				letters:
					/[\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784]/g,
			},
			{
				base: "T",
				letters:
					/[\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786]/g,
			},
			{ base: "TZ", letters: /[\uA728]/g },
			{
				base: "U",
				letters:
					/[\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244]/g,
			},
			{
				base: "V",
				letters: /[\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245]/g,
			},
			{ base: "VY", letters: /[\uA760]/g },
			{
				base: "W",
				letters:
					/[\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72]/g,
			},
			{ base: "X", letters: /[\u0058\u24CD\uFF38\u1E8A\u1E8C]/g },
			{
				base: "Y",
				letters:
					/[\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE]/g,
			},
			{
				base: "Z",
				letters:
					/[\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762]/g,
			},
			{
				base: "a",
				letters:
					/[\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250]/g,
			},
			{ base: "aa", letters: /[\uA733]/g },
			{ base: "ae", letters: /[\u00E6\u01FD\u01E3]/g },
			{ base: "ao", letters: /[\uA735]/g },
			{ base: "au", letters: /[\uA737]/g },
			{ base: "av", letters: /[\uA739\uA73B]/g },
			{ base: "ay", letters: /[\uA73D]/g },
			{
				base: "b",
				letters:
					/[\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253]/g,
			},
			{
				base: "c",
				letters:
					/[\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184]/g,
			},
			{
				base: "d",
				letters:
					/[\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A]/g,
			},
			{ base: "dz", letters: /[\u01F3\u01C6]/g },
			{
				base: "e",
				letters:
					/[\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD]/g,
			},
			{ base: "f", letters: /[\u0066\u24D5\uFF46\u1E1F\u0192\uA77C]/g },
			{
				base: "g",
				letters:
					/[\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F]/g,
			},
			{
				base: "h",
				letters:
					/[\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265]/g,
			},
			{ base: "hv", letters: /[\u0195]/g },
			{
				base: "i",
				letters:
					/[\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131]/g,
			},
			{ base: "j", letters: /[\u006A\u24D9\uFF4A\u0135\u01F0\u0249]/g },
			{
				base: "k",
				letters:
					/[\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3]/g,
			},
			{
				base: "l",
				letters:
					/[\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747]/g,
			},
			{ base: "lj", letters: /[\u01C9]/g },
			{
				base: "m",
				letters: /[\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F]/g,
			},
			{
				base: "n",
				letters:
					/[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5]/g,
			},
			{ base: "nj", letters: /[\u01CC]/g },
			{
				base: "o",
				letters:
					/[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275]/g,
			},
			{ base: "oi", letters: /[\u01A3]/g },
			{ base: "ou", letters: /[\u0223]/g },
			{ base: "oo", letters: /[\uA74F]/g },
			{
				base: "p",
				letters:
					/[\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755]/g,
			},
			{ base: "q", letters: /[\u0071\u24E0\uFF51\u024B\uA757\uA759]/g },
			{
				base: "r",
				letters:
					/[\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783]/g,
			},
			{
				base: "s",
				letters:
					/[\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B]/g,
			},
			{
				base: "t",
				letters:
					/[\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787]/g,
			},
			{ base: "tz", letters: /[\uA729]/g },
			{
				base: "u",
				letters:
					/[\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289]/g,
			},
			{
				base: "v",
				letters: /[\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C]/g,
			},
			{ base: "vy", letters: /[\uA761]/g },
			{
				base: "w",
				letters:
					/[\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73]/g,
			},
			{ base: "x", letters: /[\u0078\u24E7\uFF58\u1E8B\u1E8D]/g },
			{
				base: "y",
				letters:
					/[\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF]/g,
			},
			{
				base: "z",
				letters:
					/[\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763]/g,
			},
		];

		for (let i = 0; i < defaultDiacriticsRemovalMap.length; i++) {
			str = str.replace(
				defaultDiacriticsRemovalMap[i].letters,
				defaultDiacriticsRemovalMap[i].base
			);
		}

		return str;
	}
}