Backend/src/models/prices/prices.router.ts

@@ -82,25 +82,6 @@ pricesRouter.get('/bestDeals/:amount', async (req: Request, res: Response) => {
     }
 });
 
-// GET prices/byProduct/list/[]
-
-pricesRouter.get('/byProduct/list/:ids', async (req: Request, res: Response) => {
-    const productIds: [number] = JSON.parse(req.params.ids);
-
-    if (!productIds) {
-        res.status(400).send('Missing parameters.');
-        return;
-    }
-
-    try {
-        const prices: Prices = await PriceService.findListByProducts(productIds);
-
-        res.status(200).send(prices);
-    } catch (e) {
-        res.status(404).send(e.message);
-    }
-});
-
 // POST items/
 
 // pricesRouter.post('/', async (req: Request, res: Response) => {

Backend/src/models/prices/prices.service.ts

@@ -195,6 +195,7 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
         let allPrices: Record<number, Price[]> = {};
 
         // Get newest prices for every product at every vendor
+
         const rows = await conn.query(
             'WITH summary AS (\n' +
             '    SELECT p.product_id,\n' +
@@ -221,11 +222,10 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
         }
 
         // Iterate over all prices to find the products with the biggest difference between amazon and other vendor
-        let deals: Price[] = [];
+        let deals = [];
-
+        for (let productId in Object.keys(allPrices)) {
-        Object.keys(allPrices).forEach(productId => {
+            if (allPrices[productId]) {
-            if (allPrices[parseInt(productId)]) {
+                let pricesForProd = allPrices[productId];
-                let pricesForProd = allPrices[parseInt(productId)];
 
                 // Get amazon price and lowest price from other vendor
                 let amazonPrice = {} as Price;
@@ -234,7 +234,6 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
                     if (price.vendor_id === 1) {
                         amazonPrice = price;
                     } else {
-                        // If there is no lowest price yet or the price of the current iteration is lower, set / replace it
                         if (!lowestPrice.price_in_cents || lowestPrice.price_in_cents > price.price_in_cents) {
                             lowestPrice = price;
                         }
@@ -246,25 +245,25 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
                     'product_id': lowestPrice.product_id,
                     'vendor_id': lowestPrice.vendor_id,
                     'price_in_cents': lowestPrice.price_in_cents,
-                    'timestamp': lowestPrice.timestamp,
+                    'timestamp' :lowestPrice.timestamp,
                     'amazonDifference': (amazonPrice.price_in_cents - lowestPrice.price_in_cents),
                     'amazonDifferencePercent': ((1 - (lowestPrice.price_in_cents / amazonPrice.price_in_cents)) * 100),
                 };
 
                 // Push only deals were the amazon price is actually higher
-                if (deal.amazonDifferencePercent > 0) {
+                if(deal.amazonDifferencePercent > 0) {
-                    deals.push(deal as Price);
+                    deals.push(deal);
+                }
             }
         }
-        });
 
         // Sort to have the best deals on the top
-        deals.sort((a, b) => a.amazonDifferencePercent! < b.amazonDifferencePercent! ? 1 : -1);
+        deals.sort((a, b) => a.amazonDifferencePercent < b.amazonDifferencePercent ? 1 : -1);
 
         // Return only as many records as requested or the maximum amount of found deals, whatever is less
         let maxAmt = Math.min(amount, deals.length);
 
-        for (let dealIndex = 0; dealIndex < maxAmt; dealIndex++) {
+        for (let dealIndex = 0; dealIndex < maxAmt; dealIndex++){
             //console.log(deals[dealIndex]);
             priceRows.push(deals[dealIndex] as Price);
         }
@@ -281,70 +280,6 @@ export const getBestDeals = async (amount: number): Promise<Prices> => {
     return priceRows;
 };
 
-/**
- * Get the lowest, latest, non-amazon price for each given product
- * @param ids the ids of the products
- */
-export const findListByProducts = async (productIds: [number]): Promise<Prices> => {
-    let conn;
-    let priceRows: Price[] = [];
-    try {
-        conn = await pool.getConnection();
-
-        let allPrices: Record<number, Price[]> = {};
-
-        // Get newest prices for every given product at every vendor
-        const rows = await conn.query(
-            'WITH summary AS (\n' +
-            '    SELECT p.product_id,\n' +
-            '           p.vendor_id,\n' +
-            '           p.price_in_cents,\n' +
-            '           p.timestamp,\n' +
-            '           ROW_NUMBER() OVER(\n' +
-            '               PARTITION BY p.product_id, p.vendor_id\n' +
-            '               ORDER BY p.timestamp DESC) AS rk\n' +
-            '    FROM prices p' +
-            '    WHERE p.product_id IN (?)' +
-            '    AND p.vendor_id != 1)\n' +
-            'SELECT s.*\n' +
-            'FROM summary s\n' +
-            'WHERE s.rk = 1', [productIds]);
-
-        // Write returned values to allPrices map with product id as key and a list of prices as value
-        for (let row in rows) {
-            if (row !== 'meta') {
-                if (!allPrices[parseInt(rows[row].product_id)]) {
-                    allPrices[parseInt(rows[row].product_id)] = [];
-                }
-
-                allPrices[parseInt(rows[row].product_id)].push(rows[row]);
-            }
-        }
-
-        // Iterate over all products to find lowest price
-        Object.keys(allPrices).forEach(productId => {
-            if (allPrices[parseInt(productId)]) {
-                let pricesForProd = allPrices[parseInt(productId)];
-
-                // Sort ascending by price so index 0 has the lowest price
-                pricesForProd.sort((a, b) => a.price_in_cents > b.price_in_cents ? 1 : -1);
-
-                // Push the lowest price to the return list
-                priceRows.push(pricesForProd[0]);
-            }
-        });
-
-    } catch (err) {
-        throw err;
-    } finally {
-        if (conn) {
-            conn.end();
-        }
-    }
-
-    return priceRows;
-};
-
 // export const create = async (newItem: Product): Promise<void> => {
 //     let conn;
 //     try {

Crawler/crawler/items.py

@@ -1,12 +0,0 @@
-# Define here the models for your scraped items
-#
-# See documentation in:
-# https://docs.scrapy.org/en/latest/topics/items.html
-
-import scrapy
-
-
-class CrawlerItem(scrapy.Item):
-    # define the fields for your item here like:
-    # name = scrapy.Field()
-    pass

Crawler/crawler/middlewares.py

@@ -1,103 +0,0 @@
-# Define here the models for your spider middleware
-#
-# See documentation in:
-# https://docs.scrapy.org/en/latest/topics/spider-middleware.html
-
-from scrapy import signals
-
-# useful for handling different item types with a single interface
-from itemadapter import is_item, ItemAdapter
-
-
-class CrawlerSpiderMiddleware:
-    # Not all methods need to be defined. If a method is not defined,
-    # scrapy acts as if the spider middleware does not modify the
-    # passed objects.
-
-    @classmethod
-    def from_crawler(cls, crawler):
-        # This method is used by Scrapy to create your spiders.
-        s = cls()
-        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
-        return s
-
-    def process_spider_input(self, response, spider):
-        # Called for each response that goes through the spider
-        # middleware and into the spider.
-
-        # Should return None or raise an exception.
-        return None
-
-    def process_spider_output(self, response, result, spider):
-        # Called with the results returned from the Spider, after
-        # it has processed the response.
-
-        # Must return an iterable of Request, or item objects.
-        for i in result:
-            yield i
-
-    def process_spider_exception(self, response, exception, spider):
-        # Called when a spider or process_spider_input() method
-        # (from other spider middleware) raises an exception.
-
-        # Should return either None or an iterable of Request or item objects.
-        pass
-
-    def process_start_requests(self, start_requests, spider):
-        # Called with the start requests of the spider, and works
-        # similarly to the process_spider_output() method, except
-        # that it doesn’t have a response associated.
-
-        # Must return only requests (not items).
-        for r in start_requests:
-            yield r
-
-    def spider_opened(self, spider):
-        spider.logger.info('Spider opened: %s' % spider.name)
-
-
-class CrawlerDownloaderMiddleware:
-    # Not all methods need to be defined. If a method is not defined,
-    # scrapy acts as if the downloader middleware does not modify the
-    # passed objects.
-
-    @classmethod
-    def from_crawler(cls, crawler):
-        # This method is used by Scrapy to create your spiders.
-        s = cls()
-        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
-        return s
-
-    def process_request(self, request, spider):
-        # Called for each request that goes through the downloader
-        # middleware.
-
-        # Must either:
-        # - return None: continue processing this request
-        # - or return a Response object
-        # - or return a Request object
-        # - or raise IgnoreRequest: process_exception() methods of
-        #   installed downloader middleware will be called
-        return None
-
-    def process_response(self, request, response, spider):
-        # Called with the response returned from the downloader.
-
-        # Must either;
-        # - return a Response object
-        # - return a Request object
-        # - or raise IgnoreRequest
-        return response
-
-    def process_exception(self, request, exception, spider):
-        # Called when a download handler or a process_request()
-        # (from other downloader middleware) raises an exception.
-
-        # Must either:
-        # - return None: continue processing this exception
-        # - return a Response object: stops process_exception() chain
-        # - return a Request object: stops process_exception() chain
-        pass
-
-    def spider_opened(self, spider):
-        spider.logger.info('Spider opened: %s' % spider.name)

Crawler/crawler/pipelines.py

@@ -1,13 +0,0 @@
-# Define your item pipelines here
-#
-# Don't forget to add your pipeline to the ITEM_PIPELINES setting
-# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html
-
-
-# useful for handling different item types with a single interface
-from itemadapter import ItemAdapter
-
-
-class CrawlerPipeline:
-    def process_item(self, item, spider):
-        return item

Crawler/crawler/settings.py

@@ -1,88 +0,0 @@
-# Scrapy settings for crawler project
-#
-# For simplicity, this file contains only settings considered important or
-# commonly used. You can find more settings consulting the documentation:
-#
-#     https://docs.scrapy.org/en/latest/topics/settings.html
-#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
-#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html
-
-BOT_NAME = 'crawler'
-
-SPIDER_MODULES = ['crawler.spiders']
-NEWSPIDER_MODULE = 'crawler.spiders'
-
-
-# Crawl responsibly by identifying yourself (and your website) on the user-agent
-USER_AGENT = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36'
-
-# Obey robots.txt rules
-ROBOTSTXT_OBEY = False
-
-# Configure maximum concurrent requests performed by Scrapy (default: 16)
-#CONCURRENT_REQUESTS = 32
-
-# Configure a delay for requests for the same website (default: 0)
-# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
-# See also autothrottle settings and docs
-DOWNLOAD_DELAY = 3
-# The download delay setting will honor only one of:
-#CONCURRENT_REQUESTS_PER_DOMAIN = 16
-CONCURRENT_REQUESTS_PER_IP = 1
-
-# Disable cookies (enabled by default)
-COOKIES_ENABLED = False
-
-# Disable Telnet Console (enabled by default)
-#TELNETCONSOLE_ENABLED = False
-
-# Override the default request headers:
-#DEFAULT_REQUEST_HEADERS = {
-#   'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
-#   'Accept-Language': 'en',
-#}
-
-# Enable or disable spider middlewares
-# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
-#SPIDER_MIDDLEWARES = {
-#    'crawler.middlewares.CrawlerSpiderMiddleware': 543,
-#}
-
-# Enable or disable downloader middlewares
-# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
-#DOWNLOADER_MIDDLEWARES = {
-#    'crawler.middlewares.CrawlerDownloaderMiddleware': 543,
-#}
-
-# Enable or disable extensions
-# See https://docs.scrapy.org/en/latest/topics/extensions.html
-#EXTENSIONS = {
-#    'scrapy.extensions.telnet.TelnetConsole': None,
-#}
-
-# Configure item pipelines
-# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
-#ITEM_PIPELINES = {
-#    'crawler.pipelines.CrawlerPipeline': 300,
-#}
-
-# Enable and configure the AutoThrottle extension (disabled by default)
-# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
-AUTOTHROTTLE_ENABLED = True
-# The initial download delay
-AUTOTHROTTLE_START_DELAY = 5
-# The maximum download delay to be set in case of high latencies
-#AUTOTHROTTLE_MAX_DELAY = 60
-# The average number of requests Scrapy should be sending in parallel to
-# each remote server
-#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
-# Enable showing throttling stats for every response received:
-#AUTOTHROTTLE_DEBUG = False
-
-# Enable and configure HTTP caching (disabled by default)
-# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
-#HTTPCACHE_ENABLED = True
-#HTTPCACHE_EXPIRATION_SECS = 0
-#HTTPCACHE_DIR = 'httpcache'
-#HTTPCACHE_IGNORE_HTTP_CODES = []
-#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'

Crawler/crawler/spiders/__init__.py

@@ -1,4 +0,0 @@
-# This package will contain the spiders of your Scrapy project
-#
-# Please refer to the documentation for information on how to create and manage
-# your spiders.

Crawler/crawler/spiders/amazon.py

@@ -1,66 +0,0 @@
-# -*- coding: utf-8 -*-
-import scrapy
-from urllib.parse import urlencode
-from urllib.parse import urljoin
-import re
-import json
-
-queries = ['iphone']
-API = ''
-
-
-def get_url(url):
-    payload = {'api_key': API, 'url': url, 'country_code': 'us'}
-    proxy_url = 'http://api.scraperapi.com/?' + urlencode(payload)
-    return proxy_url
-
-
-class AmazonSpider(scrapy.Spider):
-    name = 'amazon'
-
-    def start_requests(self):
-        for query in queries:
-            url = 'https://www.amazon.de/s?' + urlencode({'k': query})
-            yield scrapy.Request(url=url, callback=self.parse_keyword_response)
-
-    def parse_keyword_response(self, response):
-        products = response.xpath('//*[@data-asin]')
-
-        for product in products:
-            asin = product.xpath('@data-asin').extract_first()
-            product_url = f"https://www.amazon.de/dp/{asin}"
-            yield scrapy.Request(url=product_url, callback=self.parse_product_page, meta={'asin': asin})
-
-        next_page = response.xpath('//li[@class="a-last"]/a/@href').extract_first()
-        if next_page:
-            url = urljoin("https://www.amazon.de", next_page)
-            yield scrapy.Request(url=url, callback=self.parse_keyword_response)
-
-    def parse_product_page(self, response):
-        asin = response.meta['asin']
-        title = response.xpath('//*[@id="productTitle"]/text()').extract_first()
-        image = re.search('"large":"(.*?)"', response.text).groups()[0]
-        rating = response.xpath('//*[@id="acrPopover"]/@title').extract_first()
-        number_of_reviews = response.xpath('//*[@id="acrCustomerReviewText"]/text()').extract_first()
-        price = response.xpath('//*[@id="priceblock_ourprice"]/text()').extract_first()
-
-        if not price:
-            price = response.xpath('//*[@data-asin-price]/@data-asin-price').extract_first() or \
-                    response.xpath('//*[@id="price_inside_buybox"]/text()').extract_first()
-
-        temp = response.xpath('//*[@id="twister"]')
-        sizes = []
-        colors = []
-        if temp:
-            s = re.search('"variationValues" : ({.*})', response.text).groups()[0]
-            json_acceptable = s.replace("'", "\"")
-            di = json.loads(json_acceptable)
-            sizes = di.get('size_name', [])
-            colors = di.get('color_name', [])
-
-        bullet_points = response.xpath('//*[@id="feature-bullets"]//li/span/text()').extract()
-        seller_rank = response.xpath(
-            '//*[text()="Amazon Best Sellers Rank:"]/parent::*//text()[not(parent::style)]').extract()
-        yield {'asin': asin, 'Title': title, 'MainImage': image, 'Rating': rating, 'NumberOfReviews': number_of_reviews,
-               'Price': price, 'AvailableSizes': sizes, 'AvailableColors': colors, 'BulletPoints': bullet_points,
-               'SellerRank': seller_rank}

Crawler/requirements.txt

@@ -2,4 +2,3 @@ pymysql
 flask
 flask-sqlalchemy
 flask_restful
-scrapy

Crawler/scrapy.cfg

@@ -1,11 +0,0 @@
-# Automatically created by: scrapy startproject
-#
-# For more information about the [deploy] section see:
-# https://scrapyd.readthedocs.io/en/latest/deploy.html
-
-[settings]
-default = crawler.settings
-
-[deploy]
-#url = http://localhost:6800/
-project = crawler