mirror of
https://github.com/badlogic/heissepreise.git
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436 lines
15 KiB
JavaScript
436 lines
15 KiB
JavaScript
const stores = {
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billa: {
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name: "Billa",
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budgetBrands: ["clever"],
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color: "rgb(255 255 225)",
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},
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spar: {
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name: "Spar",
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budgetBrands: ["s-budget"],
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color: "rgb(225 244 225)",
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},
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hofer: {
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name: "Hofer",
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budgetBrands: ["milfina"],
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color: "rgb(230 230 255)",
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},
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lidl: {
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name: "Lidl",
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budgetBrands: ["milbona"],
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color: "rgb(255 225 225)",
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},
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mpreis: {
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name: "MPREIS",
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budgetBrands: [],
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color: "rgb(255 230 230)",
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},
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dm: {
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name: "DM",
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budgetBrands: [],
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color: "rgb(255 240 230)",
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},
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unimarkt: {
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name: "Unimarkt",
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budgetBrands: ["jeden tag", "unipur"],
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color: "rgb(179, 217, 255)",
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},
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};
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const STORE_KEYS = Object.keys(stores);
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const BUDGET_BRANDS = [].concat(
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...Object
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.values(stores)
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.map(store => store.budgetBrands)
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);
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function currentDate() {
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const currentDate = new Date();
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const year = currentDate.getFullYear();
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const month = String(currentDate.getMonth() + 1).padStart(2, '0');
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const day = String(currentDate.getDate()).padStart(2, '0');
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return `${year}-${month}-${day}`;
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}
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function getQueryParameter(name) {
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const url = window.location.href;
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const queryString = url.substring(url.indexOf('?') + 1);
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const parameters = queryString.split('&');
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for (var i = 0; i < parameters.length; i++) {
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const parameter = parameters[i].split('=');
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const paramName = decodeURIComponent(parameter[0]);
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if (paramName == name) return decodeURIComponent(parameter[1]);
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}
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return null;
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}
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function toNumber(value, defaultValue) {
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try {
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return Number.parseFloat(value);
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} catch (e) {
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return defaultValue;
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}
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}
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function dom(el, html) {
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let element = document.createElement(el);
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element.innerHTML = html;
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return element;
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}
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async function loadItems() {
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const response = await fetch("latest-canonical.json")
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const items = await response.json();
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for (item of items) {
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item.search = item.name + " " + item.unit;
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item.search = item.search.toLowerCase().replace(",", ".");
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item.numPrices = item.priceHistory.length;
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item.priceOldest = item.priceHistory[item.priceHistory.length - 1].price;
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item.dateOldest = item.priceHistory[item.priceHistory.length - 1].date;
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item.date = item.priceHistory[0].date;
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let highestPriceBefore = -1;
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for (let i = 1; i < item.priceHistory.length; i++) {
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const price = item.priceHistory[i];
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highestPriceBefore = Math.max(highestPriceBefore, price.price);
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}
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if (highestPriceBefore == -1) highestPriceBefore = item.price;
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item.highestBefore = highestPriceBefore;
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}
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return items;
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}
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let carts = [];
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loadCarts();
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function loadCarts() {
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let val = localStorage.getItem("carts");
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carts = val ? JSON.parse(val) : [];
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}
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function saveCarts() {
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localStorage.setItem("carts", JSON.stringify(carts, null, 2));
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}
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function hasCart(name) {
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for (cart of carts) {
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if (cart.name = name) return true;
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}
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return false;
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}
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function addCart(name) {
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carts.push({
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name: name,
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items: []
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});
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saveCarts();
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}
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function removeCart(name) {
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carts = carts.filter(cart => cart.name != name);
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saveCarts();
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}
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function itemToStoreLink(item) {
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if (STORE_KEYS.includes(item.store)) {
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return `<a target="_blank" class="itemname itemname--${item.store}" rel="noopener noreferrer nofollow" href="${item.url}">${item.name}</a>`
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}
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return `<span class="itemname itemname--${item.store} itemname--nolink">${item.name}</span>`;
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}
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function itemToDOM(item) {
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let storeDom = dom("td", item.store);
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storeDom.setAttribute("data-label", "Kette");
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let nameDom = dom("td", `${itemToStoreLink(item)}`);
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nameDom.setAttribute("data-label", "Name");
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let quantity = item.quantity || ""
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let unit = item.unit || "";
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if(quantity >= 1000 && (unit == 'g' || unit == 'ml')) {
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quantity = parseFloat((0.001 * quantity).toFixed(2));
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unit = unit == 'ml' ? 'l' : 'kg';
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}
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let unitDom = dom("td", (item.isWeighted ? "⚖ " : "") + `${quantity} ${unit}`);
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unitDom.setAttribute("data-label", "Menge");
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let increase = "";
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if (item.priceHistory.length > 1) {
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let percentageChange = Math.round((item.priceHistory[0].price - item.priceHistory[1].price) / item.priceHistory[1].price * 100);
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increase = `<span class="${percentageChange > 0 ? "increase" : "decrease"}">${(percentageChange > 0 ? "+" + percentageChange : percentageChange)}%</span>`;
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}
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let priceDomText = `${Number(item.price).toFixed(2)} ${increase} ${item.priceHistory.length > 1 ? "(" + (item.priceHistory.length - 1) + ")" : ""}`;
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let pricesText = "";
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for (let i = 0; i < item.priceHistory.length; i++) {
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const date = item.priceHistory[i].date;
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const currPrice = item.priceHistory[i].price;
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const lastPrice = item.priceHistory[i + 1] ? item.priceHistory[i + 1].price : currPrice;
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const increase = Math.round((currPrice - lastPrice) / lastPrice * 100);
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let priceColor = "black";
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if (increase > 0) priceColor = "red";
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if (increase < 0) priceColor = "green";
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pricesText += `<span style="color: ${priceColor}">${date} ${currPrice} ${increase > 0 ? "+" + increase : increase}%</span>`;
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if (i != item.priceHistory.length - 1) pricesText += "<br>";
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}
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let priceDom = dom("td", `${priceDomText}<div class="priceinfo hide">${pricesText}</div>`);
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priceDom.setAttribute("data-label", "Preis");
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if (item.priceHistory.length > 1) {
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priceDom.style["cursor"] = "pointer";
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priceDom.addEventListener("click", () => {
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const pricesDom = priceDom.querySelector(".priceinfo");
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if (pricesDom.classList.contains("hide")) {
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pricesDom.classList.remove("hide");
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} else {
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pricesDom.classList.add("hide");
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}
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});
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}
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let row = dom("tr", "");
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row.style["background"] = stores[item.store]?.color;
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row.appendChild(storeDom);
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row.appendChild(nameDom);
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row.appendChild(unitDom);
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row.appendChild(priceDom);
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return row;
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}
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let componentId = 0;
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function searchItems(items, query, checkedStores, budgetBrands, minPrice, maxPrice, exact, bio) {
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query = query.trim();
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if (query.length < 3) return [];
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if (query.charAt(0) == "!") {
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query = query.substring(1);
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return alasql("select * from ? where " + query, [items]);
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}
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const tokens = query.split(/\s+/).map(token => token.toLowerCase().replace(",", "."));
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let hits = [];
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for (item of items) {
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let allFound = true;
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for (token of tokens) {
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if (token.length == 0) continue;
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const index = item.search.indexOf(token);
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if (index < 0) {
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allFound = false;
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break;
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}
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if (exact) {
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if (index > 0 && (item.search.charAt(index - 1) != " " && item.search.charAt(index - 1) != "-")) {
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allFound = false;
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break;
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}
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if (index + token.length < item.search.length && item.search.charAt(index + token.length) != " ") {
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allFound = false;
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break;
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}
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}
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}
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if (allFound) {
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const name = item.name.toLowerCase();
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if (checkedStores.length && !checkedStores.includes(item.store)) continue;
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if (item.price < minPrice) continue;
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if (item.price > maxPrice) continue;
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if (
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budgetBrands &&
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!BUDGET_BRANDS.some(budgetBrand => name.indexOf(budgetBrand) >= 0)
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) continue;
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if (bio && !item.bio) continue;
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hits.push(item);
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}
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}
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return hits;
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}
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function newSearchComponent(parentElement, items, searched, filter, headerModifier, itemDomModifier) {
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let id = componentId++;
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parentElement.innerHTML = "";
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parentElement.innerHTML = `
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<input id="search-${id}" class="search" type="text" placeholder="Produkte suchen...">
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<a id="querylink-${id}" class="hide">Query link</a>
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<div class="filters filters--store">
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${STORE_KEYS.map(store => `<label><input id="${store}-${id}" type="checkbox" checked="true">${stores[store].name}</label>`).join(" ")}
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</div>
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<div class="filters">
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<label><input id="budgetBrands-${id}" type="checkbox"> Nur ${BUDGET_BRANDS.map(budgetBrand => budgetBrand.toUpperCase()).join(", ")}</label>
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<label><input id="bio-${id}" type="checkbox"> Nur Bio</label>
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</div>
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<div class="filters">
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<label>Min € <input id="minprice-${id}" type="number" min="0" value="0"></label>
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<label>Max € <input id="maxprice-${id}" type="number" min="0" value="100"></label>
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<label><input id="exact-${id}" type="checkbox"> Exaktes Wort</label>
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</div>
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<div id="numresults-${id}"></div>
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<table id="result-${id}" class="searchresults"></table>
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`;
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const searchInput = parentElement.querySelector(`#search-${id}`);
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const queryLink = parentElement.querySelector(`#querylink-${id}`);
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const exact = parentElement.querySelector(`#exact-${id}`);
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const table = parentElement.querySelector(`#result-${id}`);
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const budgetBrands = parentElement.querySelector(`#budgetBrands-${id}`);
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const bio = parentElement.querySelector(`#bio-${id}`);
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const storeCheckboxes = STORE_KEYS.map(store => parentElement.querySelector(`#${store}-${id}`));
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const minPrice = parentElement.querySelector(`#minprice-${id}`);
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const maxPrice = parentElement.querySelector(`#maxprice-${id}`);
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const numResults = parentElement.querySelector(`#numresults-${id}`);
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let search = (query) => {
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let hits = [];
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let now = performance.now();
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try {
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hits = searchItems(items, query,
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STORE_KEYS.filter((store, i) => storeCheckboxes[i].checked),
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budgetBrands.checked, toNumber(minPrice.value, 0), toNumber(maxPrice.value, 100), exact.checked, bio.checked
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);
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} catch (e) {
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console.log("Query: " + query + "\n" + e.message);
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}
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console.log("Search took " + (performance.now() - now) / 1000.0 + " secs");
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if (searched) hits = searched(hits);
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if (filter) hits = hits.filter(filter);
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table.innerHTML = "";
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if (hits.length == 0) {
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numResults.innerHTML = "Resultate: 0";
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return;
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}
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if (query.trim().charAt(0) != "!") hits.sort((a, b) => a.price - b.price);
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let header = dom("tr", `<th>Kette</th><th>Name</th><th>Menge</th><th>Preis</th>`);
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if (headerModifier) header = headerModifier(header);
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const thead = dom("thead", ``);
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thead.appendChild(header);
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table.appendChild(thead);
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now = performance.now();
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let num = 0;
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hits.every(hit => {
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let itemDom = itemToDOM(hit);
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if (itemDomModifier) itemDom = itemDomModifier(hit, itemDom, hits);
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table.appendChild(itemDom);
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num++;
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return num < 500;
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});
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console.log("Building DOM took: " + (performance.now() - now) / 1000.0 + " secs");
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numResults.innerHTML = "Resultate: " + hits.length + (num < hits.length ? ", " + num + " angezeigt" : "");
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}
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searchInput.addEventListener("input", (event) => {
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const query = searchInput.value.trim();
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if (query == 0) {
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minPrice.value = 0;
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maxPrice.value = 100;
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}
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if (query.length > 0 && query.charAt(0) == "!") {
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parentElement.querySelectorAll(".filters").forEach(f => f.style.display = "none");
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queryLink.classList.remove("hide");
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queryLink.setAttribute("href", "/?q=" + encodeURIComponent(query));
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} else {
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parentElement.querySelectorAll(".filters").forEach(f => f.style.display = "block");
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queryLink.classList.add("hide");
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}
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search(searchInput.value);
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});
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budgetBrands.addEventListener("change", () => search(searchInput.value));
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bio.addEventListener("change", () => search(searchInput.value));
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storeCheckboxes.map(store => store.addEventListener("change", () => search(searchInput.value)));
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exact.addEventListener("change", () => search(searchInput.value));
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minPrice.addEventListener("change", () => search(searchInput.value));
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maxPrice.addEventListener("change", () => search(searchInput.value));
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return () => search(searchInput.value);
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}
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function showChart(canvasDom, items) {
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if (items.length == 0) {
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canvasDom.style.display = "none";
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return;
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} else {
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canvasDom.style.display = "block";
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}
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const allDates = items.flatMap(product => product.priceHistory.map(item => item.date));
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const uniqueDates = [...new Set(allDates)];
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uniqueDates.sort();
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const datasets = items.map(product => {
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let price = null;
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const prices = uniqueDates.map(date => {
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const priceObj = product.priceHistory.find(item => item.date === date);
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if (!price && priceObj) price = priceObj.price;
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return priceObj ? priceObj.price : null;
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});
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for (let i = 0; i < prices.length; i++) {
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if (prices[i] == null) {
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prices[i] = price;
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} else {
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price = prices[i];
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}
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}
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return {
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label: (product.store ? product.store + " " : "") + product.name,
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data: prices,
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};
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});
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const ctx = canvasDom.getContext('2d');
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if (canvasDom.lastChart) canvasDom.lastChart.destroy();
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canvasDom.lastChart = new Chart(ctx, {
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type: 'line',
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data: {
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labels: uniqueDates,
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datasets: datasets
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},
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options: {
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responsive: true,
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aspectRation: 16 / 9,
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scales: {
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y: {
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title: {
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display: true,
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text: "EURO"
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}
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}
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}
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}
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});
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}
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function calculateOverallPriceChanges(items) {
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if (items.length == 0) return { dates: [], changes: [] };
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const allDates = items.flatMap(product => product.priceHistory.map(item => item.date));
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const uniqueDates = [...new Set(allDates)];
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uniqueDates.sort();
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const allPrices = items.map(product => {
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let price = null;
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const prices = uniqueDates.map(date => {
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const priceObj = product.priceHistory.find(item => item.date === date);
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if (!price && priceObj) price = priceObj.price;
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return priceObj ? priceObj.price : null;
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});
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for (let i = 0; i < prices.length; i++) {
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if (!prices[i]) {
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prices[i] = price;
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} else {
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price = prices[i];
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}
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}
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return prices;
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});
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const priceChanges = [];
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for (let i = 0; i < uniqueDates.length; i++) {
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let price = 0;
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for (let j = 0; j < allPrices.length; j++) {
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price += allPrices[j][i];
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}
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priceChanges.push({ date: uniqueDates[i], price });
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}
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return priceChanges;
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} |