feat: invert logic (#141)

Co-authored-by: Jef LeCompte <jeffreylec@gmail.com>

src/store/lookup.ts

@@ -1,8 +1,8 @@
-import {Browser, Response} from 'puppeteer';
+import {Browser, Page, Response} from 'puppeteer';
+import {Link, Store} from './model';
 import {closePage, delay, getSleepTime} from '../util';
 import {Config} from '../config';
 import {Logger} from '../logger';
-import {Store} from './model';
 import {includesLabels} from './includes-labels';
 import open from 'open';
 import {sendNotification} from '../notification';
@@ -57,63 +57,97 @@ async function lookup(browser: Browser, store: Store) {
 		page.setDefaultNavigationTimeout(Config.page.navigationTimeout);
 		await page.setUserAgent(Config.page.userAgent);
 
-		const graphicsCard = `${link.brand} ${link.model} ${link.series}`;
-
-		let response: Response | null;
 		try {
-			response = await page.goto(link.url, {waitUntil: 'networkidle0'});
-		} catch {
-			Logger.error(`✖ [${store.name}] ${graphicsCard} skipping; timed out`);
-			await closePage(page);
-			continue;
+			await lookupCard(browser, store, page, link);
+		} catch (error) {
+			Logger.error(`✖ [${store.name}] ${link.brand} ${link.model} - ${error.message as string}`);
 		}
 
-		const bodyHandle = await page.$('body');
-		const textContent = await page.evaluate(body => body.textContent, bodyHandle);
+		await closePage(page);
+	}
+	/* eslint-enable no-await-in-loop */
+}
 
-		Logger.debug(textContent);
+async function lookupCard(browser: Browser, store: Store, page: Page, link: Link) {
+	const response: Response | null = await page.goto(link.url, {waitUntil: 'networkidle0'});
+	const graphicsCard = `${link.brand} ${link.model}`;
+
+	if (await lookupCardInStock(store, page)) {
+		Logger.info(`🚀🚀🚀 [${store.name}] ${graphicsCard} IN STOCK 🚀🚀🚀`);
+		Logger.info(link.url);
+		if (Config.page.inStockWaitTime) {
+			inStock[store.name] = true;
+			setTimeout(() => {
+				inStock[store.name] = false;
+			}, 1000 * Config.page.inStockWaitTime);
+		}
 
-		if (includesLabels(textContent, store.labels.outOfStock)) {
-			Logger.info(`✖ [${store.name}] still out of stock: ${graphicsCard}`);
-		} else if (store.labels.bannedSeller && includesLabels(textContent, store.labels.bannedSeller)) {
-			Logger.warn(`✖ [${store.name}] banned seller detected: ${graphicsCard}. skipping...`);
-		} else if (store.labels.captcha && includesLabels(textContent, store.labels.captcha)) {
-			Logger.warn(`✖ [${store.name}] CAPTCHA from: ${graphicsCard}. Waiting for a bit with this store...`);
-			await delay(getSleepTime());
-		} else if (response && response.status() === 429) {
-			Logger.warn(`✖ [${store.name}] Rate limit exceeded: ${graphicsCard}`);
-		} else {
-			Logger.info(`🚀🚀🚀 [${store.name}] ${graphicsCard} IN STOCK 🚀🚀🚀`);
-			Logger.info(link.url);
-			if (Config.page.inStockWaitTime) {
-				inStock[store.name] = true;
-				setTimeout(() => {
-					inStock[store.name] = false;
-				}, 1000 * Config.page.inStockWaitTime);
-			}
+		if (Config.page.capture) {
+			Logger.debug('ℹ saving screenshot');
+			link.screenshot = `success-${Date.now()}.png`;
+			await page.screenshot({path: link.screenshot});
+		}
+
+		const givenUrl = link.cartUrl ? link.cartUrl : link.url;
 
-			if (Config.page.capture) {
-				Logger.debug('ℹ saving screenshot');
-				link.screenshot = `success-${Date.now()}.png`;
-				await page.screenshot({path: link.screenshot});
+		if (Config.browser.open) {
+			if (link.openCartAction === undefined) {
+				await open(givenUrl);
+			} else {
+				link.openCartAction(browser);
 			}
+		}
 
-			const givenUrl = link.cartUrl ? link.cartUrl : link.url;
+		sendNotification(givenUrl, link);
+		return;
+	}
 
-			if (Config.browser.open) {
-				if (link.openCartAction === undefined) {
-					await open(givenUrl);
-				} else {
-					link.openCartAction(browser);
-				}
-			}
+	if (await lookupPageHasCaptcha(store, page)) {
+		Logger.warn(`✖ [${store.name}] CAPTCHA from: ${graphicsCard}. Waiting for a bit with this store...`);
+		await delay(getSleepTime());
+		return;
+	}
 
-			sendNotification(givenUrl, link);
-		}
+	if (response && response.status() === 429) {
+		Logger.warn(`✖ [${store.name}] Rate limit exceeded: ${graphicsCard}`);
+		return;
+	}
 
-		await closePage(page);
+	Logger.info(`✖ [${store.name}] still out of stock: ${graphicsCard}`);
+}
+
+async function lookupCardInStock(store: Store, page: Page) {
+	const stockHandle = await page.$(store.labels.inStock.container);
+
+	const visible = await page.evaluate(element => element && element.offsetWidth > 0 && element.offsetHeight > 0, stockHandle);
+	if (!visible) {
+		return false;
 	}
-	/* eslint-enable no-await-in-loop */
+
+	const stockContent = await page.evaluate(element => element.outerHTML, stockHandle);
+
+	Logger.debug(stockContent);
+
+	if (includesLabels(stockContent, store.labels.inStock.text)) {
+		return true;
+	}
+
+	return false;
+}
+
+async function lookupPageHasCaptcha(store: Store, page: Page) {
+	if (!store.labels.captcha) {
+		return false;
+	}
+
+	const captchaHandle = await page.$(store.labels.captcha.container);
+	const captchaContent = await page.evaluate(element => element.textContent, captchaHandle);
+
+	if (includesLabels(captchaContent, store.labels.captcha.text)) {
+		return true;
+	}
+
+	return false;
 }
 
 export async function tryLookupAndLoop(browser: Browser, store: Store) {

src/store/model/adorama.ts

@@ -2,8 +2,10 @@ import {Store} from './store';
 
 export const Adorama: Store = {
 	labels: {
-		captcha: ['please verify you are a human'],
-		outOfStock: ['temporarily not available', 'out of stock']
+		inStock: {
+			container: '.buy-section.purchase',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{

src/store/model/amazon-ca.ts

@@ -2,8 +2,14 @@ import {Store} from './store';
 
 export const AmazonCa: Store = {
 	labels: {
-		captcha: ['enter the characters you see below'],
-		outOfStock: ['currently unavailable']
+		captcha: {
+			container: 'body',
+			text: ['enter the characters you see below']
+		},
+		inStock: {
+			container: '#desktop_buybox',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{

src/store/model/amazon.ts

@@ -2,9 +2,14 @@ import {Store} from './store';
 
 export const Amazon: Store = {
 	labels: {
-		bannedSeller: ['sports authentics', 'raccoon capitalist', 'gigaparts'],
-		captcha: ['enter the characters you see below'],
-		outOfStock: ['currently unavailable', 'available from these sellers']
+		captcha: {
+			container: 'body',
+			text: ['enter the characters you see below']
+		},
+		inStock: {
+			container: '#desktop_buybox',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{

src/store/model/asus.ts

@@ -2,9 +2,18 @@ import {Store} from './store';
 
 export const Asus: Store = {
 	labels: {
-		outOfStock: ['coming soon', 'temporarily sold out']
+		inStock: {
+			container: '#item_add_cart',
+			text: ['add to cart']
+		}
 	},
 	links: [
+		{
+			brand: 'TEST',
+			model: 'CARD',
+			series: 'debug',
+			url: 'https://store.asus.com/us/item/202003AM280000002/'
+		},
 		{
 			brand: 'asus',
 			model: 'tuf oc',

src/store/model/bandh.ts

@@ -2,7 +2,10 @@ import {Store} from './store';
 
 export const BAndH: Store = {
 	labels: {
-		outOfStock: ['notify when available', 'try varying your search terms', 'sorry, an unexpected error has occurred']
+		inStock: {
+			container: 'div[data-selenium="addToCartSection"]',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{
@@ -61,7 +64,6 @@ export const BAndH: Store = {
 			series: '3080',
 			url: 'https://www.bhphotovideo.com/c/product/1593646-REG/msi_geforce_rtx_3080_ventus.html'
 		}
-
 	],
 	name: 'bandh'
 };

src/store/model/bestbuy.ts

@@ -2,7 +2,10 @@ import {Store} from './store';
 
 export const BestBuy: Store = {
 	labels: {
-		outOfStock: ['sold out', 'coming soon']
+		inStock: {
+			container: '.v-m-bottom-g',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{

src/store/model/evga-eu.ts

@@ -2,7 +2,10 @@ import {Store} from './store';
 
 export const EvgaEu: Store = {
 	labels: {
-		outOfStock: ['tbd', 'out of stock', 'error reaching the evga website', 'oops! something broke.']
+		inStock: {
+			container: '.product-buy-specs',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{

src/store/model/evga.ts

@@ -2,7 +2,10 @@ import {Store} from './store';
 
 export const Evga: Store = {
 	labels: {
-		outOfStock: ['out of stock', 'error reaching the evga website', 'oops! something broke.']
+		inStock: {
+			container: '.product-buy-specs',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{

src/store/model/microcenter.ts

@@ -2,7 +2,10 @@ import {Store} from './store';
 
 export const MicroCenter: Store = {
 	labels: {
-		outOfStock: ['sold out']
+		inStock: {
+			container: '#cart-options',
+			text: ['(in stock)']
+		}
 	},
 	links: [
 		{

src/store/model/newegg-ca.ts

@@ -2,8 +2,14 @@ import {Store} from './store';
 
 export const NewEggCa: Store = {
 	labels: {
-		captcha: ['are you a human?'],
-		outOfStock: ['auto notify', 'item is currently out of stock', 'service unavailable']
+		captcha: {
+			container: 'body',
+			text: ['are you a human?']
+		},
+		inStock: {
+			container: '#landingpage-cart .btn-primary span',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{

src/store/model/newegg.ts

@@ -2,8 +2,14 @@ import {Store} from './store';
 
 export const NewEgg: Store = {
 	labels: {
-		captcha: ['are you a human?'],
-		outOfStock: ['auto notify', 'item is currently out of stock', 'service unavailable', 'we are currently experiencing problems on our server']
+		captcha: {
+			container: 'body',
+			text: ['are you a human?']
+		},
+		inStock: {
+			container: '#landingpage-cart .btn-primary span',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{

src/store/model/nvidia.ts

@@ -35,7 +35,10 @@ export const regionInfos = new Map<string, NvidiaRegionInfo>([
 
 export const Nvidia: Store = {
 	labels: {
-		outOfStock: ['product_inventory_out_of_stock', 'rate limit exceeded', 'request timeout']
+		inStock: {
+			container: 'body',
+			text: ['product_inventory_in_stock']
+		}
 	},
 	links: generateLinks(),
 	name: 'nvidia',

src/store/model/officedepot.ts

@@ -2,15 +2,21 @@ import {Store} from './store';
 
 export const OfficeDepot: Store = {
 	labels: {
-		captcha: ['please verify you are a human'],
-		outOfStock: ['out of stock for delivery', 'out of stock', 'we are unable to process your last request']
+		captcha: {
+			container: 'body',
+			text: ['please verify you are a human']
+		},
+		inStock: {
+			container: '#productPurchase',
+			text: ['add to cart']
+		}
 	},
 	links: [
 		{
 			brand: 'TEST',
 			model: 'CARD',
 			series: 'debug',
-			url: 'https://www.officedepot.com/a/products/7189374/PNY-GeForce-RTX-3080-10GB-GDDR6X/'
+			url: 'https://www.officedepot.com/a/products/4652239/EVGA-GeForce-RTX-2060-Graphic-Card/'
 		},
 		{
 			brand: 'pny',

src/store/model/store.ts

@@ -1,5 +1,10 @@
 import {Browser} from 'puppeteer';
 
+export interface Element {
+	container: string;
+	text: string[];
+}
+
 export interface Link {
 	series: string;
 	brand: string;
@@ -11,9 +16,8 @@ export interface Link {
 }
 
 export interface Labels {
-	outOfStock: string[];
-	captcha?: string[];
-	bannedSeller?: string[];
+	captcha?: Element;
+	inStock: Element;
 }
 
 export interface Store {