.gitignore

@@ -1,5 +1,3 @@
 node_modules
-.vscode
-web-ext-artifacts
-.amo-upload-uuid
 dist
+.vscode

README.md

@@ -1,30 +0,0 @@
-
-# :dollar: Kobo Price
-
-Helps you find the lowest book price on kobo.com.
-
-![example](./img/example.gif)
-
-## Installation
-You can install this script in several ways:
-
-- [Firefox add-on](https://addons.mozilla.org/en-US/firefox/addon/kobo-price)
-- [Chrome extension](https://chromewebstore.google.com/detail/kobo-price/gjiadglcgiidfphjijgeellagidbkiah)
-- [Userscript](https://raw.githubusercontent.com/fotonmoton/koboprice/master/userscript/koboprice.user.js)
-
-## Usage
-On kobo.com, the book price for each country could be different. This script will fetch all book prices, convert them to USD at today's rate, sort them, and show to you as a list. Then you can change your billing address to the country whose price you like and proceed to checkout.
-
-- Go to the book/audiobook page you want to buy
-- wait a couple of minutes until all the prices are loaded (you should see the progress on the right side of the book page)
-- get the list of prices sorted and converted to USD
-
-## Build
-
-All artifacts are based on the `dist/index.js` bundle. To get it, run `npm run bundle`. To get the web extension archive, run `npm run build-ext`. To get the userscript, run `npm run build-userscript`.
-
-To get all the above:
-
-```sh
-npm install && npm build-all
-```

eslint.config.js

@@ -4,7 +4,7 @@ import globals from "globals";
 
 export default [
   {
-    ignores: ["dist", "userscript"],
+    ignores: ["dist"],
   },
   eslintPluginPrettierRecommended,
   js.configs.recommended,

lib/bookPriceFor.js

@@ -1,5 +1,5 @@
 import { bookUrl } from "./bookUrl";
-import { extractPrice } from "./extractPrice";
+import { extractPriceFrom } from "./extractPriceFrom";
 import { getRate } from "./rates";
 import { convertPrice } from "./convertPrice";
 import { cacheBookPrice, getBookPrice } from "./cache";
@@ -17,7 +17,7 @@ export const bookPriceFor = async (country) => {
     return fromCache;
   }
 
-  const countryPrice = await extractPrice(url);
+  const countryPrice = await extractPriceFrom(url);
 
   let convertedPrice;
 

lib/bookUrl.js

@@ -1,9 +1,6 @@
 export const bookUrl = (country) => {
   const urlPattern = /^https:\/\/www\.kobo\.com\/../;
   const newPath = `https://www.kobo.com/${country}`;
-  const url = window.location.href.replace(urlPattern, newPath);
 
-  l("url for country", country, url);
-
-  return url;
+  return window.location.href.replace(urlPattern, newPath);
 };

lib/convertPrice.js

@@ -26,14 +26,9 @@ export const convertPrice = async (price, curr, rate) => {
       price = price.replace("S/.", "");
       break;
     }
-    case "try": {
-      price = price.replace(".", "").replace(",", ".");
-      break;
-    }
     case "clp":
     case "cop":
-    case "twd":
-    case "mxn": {
+    case "twd": {
       break;
     }
     default:

lib/extractPriceFrom.js

@@ -2,12 +2,12 @@ const timeout = (duration) => new Promise((r) => setTimeout(r, duration));
 
 const observePriceOnPage = (page) =>
   new Promise((res, rej) => {
-    timeout(5000).then(() => rej("price not found"));
+    timeout(10000).then(() => rej("price not found"));
 
     var observer = new MutationObserver(() => {
-      const price = page?.querySelector(
+      const price = page.querySelector(
         ".primary-right-container .pricing-details .active-price span",
-      )?.textContent;
+      ).textContent;
 
       if (price) {
         l("found price", price);
@@ -24,7 +24,7 @@ const observePriceOnPage = (page) =>
     });
   });
 
-export const extractPrice = async (url) => {
+export const extractPriceFrom = async (url) => {
   try {
     l("going to", url);
 

lib/index.js

@@ -1,124 +1,104 @@
 import "./logger";
+import { COUNTRIES } from "./countries";
 import { initCache } from "./cache";
-import { createElement, h, render } from "preact";
-import { usePrices } from "./usePrices";
-import { useCallback, useState } from "preact/hooks";
+import { bookPriceFor } from "./bookPriceFor";
 
 /*
 TODO:
+- publish to stores
 - more durable source for rates
+- React for UI
+- More informative UI, show loading progress
+- clear stale cache
 - readme how to use and debug
+- configuration (purge cache, change base currency)
 */
 
 const createPricesContainer = () => {
-  const pricingActionContainers = document.querySelectorAll(".pricing-details");
+  const pricingActionContainer = document.querySelector(
+    ".primary-right-container",
+  );
 
-  l("all pricing containers", pricingActionContainers);
+  const container = document.createElement("div");
 
-  let visible;
-  for (const node of pricingActionContainers) {
-    if (node.checkVisibility()) {
-      l("found visible pricing container", node);
-      visible = node;
-      break;
-    }
-  }
+  container.style.display = "flex";
+  container.style.flexDirection = "column";
+  container.style.border = "1px solid black";
+  container.style.padding = "10px";
 
-  return visible.parentNode.insertBefore(
-    document.createElement("div"),
-    visible,
+  return pricingActionContainer.parentNode.insertBefore(
+    container,
+    pricingActionContainer,
   );
 };
 
-const isInLibrary = () => document.querySelectorAll(".read-now").length;
-
-const formatPrice = (countryPrice, convertedPrice) => {
-  if (countryPrice == undefined) {
-    return `LOADING`;
+const getPrices = async () => {
+  const prices = [];
+  for (const country of COUNTRIES) {
+    // intentionally blocking execution
+    // to resolve sequentially.
+    // It should prevent DOS and triggering captcha
+    prices.push(await bookPriceFor(country));
   }
 
-  if (convertedPrice) {
-    return `${countryPrice} => ${convertedPrice?.formatted}`;
-  }
-  return `NOT FOUND`;
+  return prices;
 };
 
-const Price = ({ props }) => {
-  const { convertedPrice, countryCode, countryPrice, url } = props;
-  const [isHovered, setHover] = useState(false);
-
-  const hover = useCallback(() => setHover(true));
-  const leave = useCallback(() => setHover(false));
-
-  const style = {
-    display: "flex",
-    flexDirection: "row",
-    justifyContent: "space-between",
-    backgroundColor: isHovered ? "#d7d7d7" : "",
-    padding: "10px 10px 0 10px",
-  };
-
-  return h(
-    "a",
-    {
-      style,
-      href: url,
-      target: "_blank",
-      onMouseEnter: hover,
-      onMouseLeave: leave,
-    },
-    [
-      h("p", null, countryCode.toUpperCase()),
-      h(
-        "p",
-        { style: { fontWeight: "bold" } },
-        formatPrice(countryPrice, convertedPrice),
-      ),
-    ],
-  );
-};
-
-const InLibrary = () =>
-  h(
-    "div",
-    {
-      style: {
-        display: "flex",
-        flexDirection: "column",
-        border: "1px solid black",
-        textAlign: "center",
-      },
-    },
-    h("h2", null, "Already in Library!"),
+const sortPrices = (prices) =>
+  prices.sort(
+    (a, b) =>
+      (a?.convertedPrice?.intValue || Infinity) -
+      (b?.convertedPrice?.intValue || Infinity),
   );
 
-const Percent = (percent) => {
-  const style = { padding: "10px 10px 0 10px", textAlign: "center" };
-
-  if (percent == 100) return h("h2", { style }, "all prices are loaded!");
-
-  return h("h2", { style }, `${percent}%`);
+const showPrices = (container, prices) => {
+  container.innerText = null;
+  prices.forEach((price) => {
+    const link = document.createElement("a");
+    link.href = price.url;
+    link.target = "_blank";
+    link.style.marginBottom = "5px";
+    link.style.display = "flex";
+    link.style.justifyContent = "space-between";
+    const oldPrice = document.createElement("p");
+    oldPrice.innerText = `${price.countryCode.toUpperCase()}: ${price?.countryPrice || "NO PRICE"}`;
+    const newPrice = document.createElement("p");
+    newPrice.innerText = price?.convertedPrice?.formatted ?? "NO PRICE";
+    newPrice.style.fontWeight = "bold";
+    link.appendChild(oldPrice);
+    link.appendChild(newPrice);
+    container.appendChild(link);
+  });
 };
 
-const App = () => {
-  const [prices, percentChecked] = usePrices();
+async function main() {
+  const container = createPricesContainer();
 
-  const style = {
-    display: "flex",
-    flexDirection: "column",
-    border: "1px solid black",
-  };
+  container.innerText = "LOADING PRICES...";
 
-  if (isInLibrary()) {
-    return InLibrary();
+  try {
+    initCache();
+
+    const countriesPrice = await getPrices();
+
+    l("country prices", countriesPrice);
+
+    sortPrices(countriesPrice);
+
+    l("sorted prices", countriesPrice);
+
+    showPrices(container, countriesPrice);
+  } catch (e) {
+    l("error", e);
+    container.innerText = "FAILED TO LOAD PRICES. CHECK CONSOLE FOR MORE INFO";
+  } finally {
+    l("done");
   }
-
-  return h("div", { style }, [
-    Percent(percentChecked),
-    ...prices.map((price) => h(Price, { props: price })),
-  ]);
-};
+}
 
 l("starting...");
-initCache();
-render(createElement(App), createPricesContainer());
+
+window.onload = () => {
+  l("page is fully loaded");
+  void main();
+};

lib/usePrices.js

@@ -1,44 +0,0 @@
-import { useEffect, useState } from "preact/hooks";
-import { COUNTRIES } from "./countries";
-import { bookPriceFor } from "./bookPriceFor";
-
-const sortPrices = (prices) =>
-  prices.sort(
-    (a, b) =>
-      (a?.convertedPrice?.intValue || Infinity) -
-      (b?.convertedPrice?.intValue || Infinity),
-  );
-
-export const usePrices = () => {
-  const [prices, setPrices] = useState(COUNTRIES);
-  useEffect(() => {
-    const fetchAll = async () => {
-      for (let index = 0; index < prices.length; index += 2) {
-        // intentionally blocking execution
-        // to resolve sequentially.
-        // It should prevent DOS and triggering captcha
-        if (index + 1 < prices.length) {
-          const [first, second] = await Promise.all([
-            bookPriceFor(prices[index]),
-            bookPriceFor(prices[index + 1]),
-          ]);
-          prices[index] = first;
-          prices[index + 1] = second;
-        } else {
-          prices[index] = await bookPriceFor(prices[index]);
-        }
-
-        sortPrices(prices);
-        setPrices([...prices]);
-      }
-      l("DONE");
-    };
-    fetchAll();
-  }, []);
-
-  const percentChecked =
-    (prices.filter((p) => p.countryPrice != undefined).length / prices.length) *
-    100;
-
-  return [prices, percentChecked.toFixed(0)];
-};

manifest.json

@@ -1,8 +1,9 @@
 {
   "name": "Kobo Price",
-  "description": "Find lowest book price on kobo.com",
-  "version": "1.2.3",
+  "description": "Lowest book price finder",
+  "version": "1.0",
   "manifest_version": 3,
+  "permissions": ["activeTab"],
   "content_scripts": [
     {
       "js": ["dist/index.js"],
@@ -12,17 +13,5 @@
         "https://www.kobo.com/*/*/audiobook/*"
       ]
     }
-  ],
-  "browser_specific_settings": {
-    "gecko": {
-      "id": "koboprice@tertyshny.dev"
-    }
-  },
-  "icons": {
-    "16": "icons/16.png",
-    "32": "icons/32.png",
-    "48": "icons/48.png",
-    "128": "icons/128.png"
-  }
- 
+  ]
 }

package-lock.json

@@ -10,8 +10,7 @@
       "license": "ISC",
       "dependencies": {
         "currency.js": "^2.0.4",
-        "date-fns": "^3.6.0",
-        "preact": "^10.22.1"
+        "date-fns": "^3.6.0"
       },
       "devDependencies": {
         "@eslint/js": "^9.6.0",
@@ -4869,15 +4868,6 @@
       "integrity": "sha512-cHjPPsE+vhj/tnhCy/wiMh3M3z3h/j15zHQX+S9GkTBgqJuTuJzYJ4gUyACLhDaJ7kk9ba9iRDmbH2tJU03OiA==",
       "dev": true
     },
-    "node_modules/preact": {
-      "version": "10.22.1",
-      "resolved": "https://registry.npmjs.org/preact/-/preact-10.22.1.tgz",
-      "integrity": "sha512-jRYbDDgMpIb5LHq3hkI0bbl+l/TQ9UnkdQ0ww+lp+4MMOdqaUYdFc5qeyP+IV8FAd/2Em7drVPeKdQxsiWCf/A==",
-      "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/preact"
-      }
-    },
     "node_modules/prelude-ls": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz",

package.json

@@ -7,13 +7,10 @@
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "lint": "eslint --fix",
-    "bundle": "esbuild lib/index.js --bundle --minify --sourcemap --target=chrome58,firefox57,safari11 --outfile=dist/index.js",
-    "watch-bundle": "npm run bundle -- --watch",
-    "watch-ext": "web-ext run --start-url https://www.kobo.com/ww/en/ebook/foundation-the-foundation-trilogy-book-1-1",
-    "watch": "concurrently npm:watch-bundle npm:watch-ext",
-    "build-userscript": "cat userscript/koboprice.meta.js dist/index.js > userscript/koboprice.user.js",
-    "build-ext": "web-ext build",
-    "build-all": "npm run bundle && npm run build-userscript && npm run build-ext"
+    "build": "esbuild lib/index.js --bundle --minify --sourcemap --target=chrome58,firefox57,safari11 --outfile=dist/index.js",
+    "watch-build": "npm run build -- --watch",
+    "watch-ext": "web-ext run --start-url kobo.com",
+    "watch": "concurrently npm:watch-build npm:watch-ext"
   },
   "author": "",
   "license": "ISC",
@@ -30,7 +27,6 @@
   },
   "dependencies": {
     "currency.js": "^2.0.4",
-    "date-fns": "^3.6.0",
-    "preact": "^10.22.1"
+    "date-fns": "^3.6.0"
   }
 }