Added srpskainfo crawler

internal/scraper/srpskainfo.go

@@ -0,0 +1,101 @@
+package scraper
+
+import (
+	"fmt"
+	"github.com/gocolly/colly"
+	"github.com/gosimple/slug"
+	"gitlab.com/kbr4/svevijesti/internal/model"
+	"regexp"
+	"strings"
+	"time"
+)
+
+var SrpskainfoArticles = make(chan model.ScrapedArticle)
+var SrpskainfoCandidates = make(chan string)
+var SrpskainfoApprovedSites = make(chan string, 2)
+
+func CrawlSrpskainfo() {
+
+	crHomePage := colly.NewCollector(colly.AllowedDomains("srpskainfo.com"))
+	crArticlePage := colly.NewCollector(colly.AllowedDomains("srpskainfo.com"))
+
+	setupSiArticlePageCrawler(crArticlePage)
+	setupSiHomepageCrawler(crHomePage, crArticlePage)
+
+	go visitSiApprovedPages(crArticlePage)
+}
+
+func visitSiApprovedPages(crArticlePage *colly.Collector) {
+	fmt.Println("Consuming sites!")
+	for url := range SrpskainfoApprovedSites {
+		fmt.Println("Visiting: ", url)
+		crArticlePage.Visit(url)
+	}
+}
+
+func setupSiHomepageCrawler(crHomePage *colly.Collector, crArticlePage *colly.Collector) {
+
+	crHomePage.OnHTML("a", func(e *colly.HTMLElement) {
+		articleUrlR, _ := regexp.Compile("([A-Za-z0-9]+-){3,}([A-Za-z0-9]+)/$")
+		url := e.Attr("href")
+		completeUrl := url
+		if articleUrlR.MatchString(url) {
+			SrpskainfoCandidates <- completeUrl
+		}
+	})
+
+	crHomePage.OnScraped(func(_ *colly.Response) {
+		time.Sleep(5 * time.Second)
+		terminating := model.ScrapedArticle{}
+		terminating.Title = model.Terminator
+		SrpskainfoArticles <- terminating
+		SrpskainfoApprovedSites <- model.Terminator
+		SrpskainfoCandidates <- model.Terminator
+	})
+
+	crHomePage.OnError(func(_ *colly.Response, _ error) {
+		time.Sleep(5 * time.Second)
+		terminating := model.ScrapedArticle{}
+		terminating.Title = model.Terminator
+		SrpskainfoArticles <- terminating
+		SrpskainfoApprovedSites <- model.Terminator
+		SrpskainfoCandidates <- model.Terminator
+	})
+
+	go crHomePage.Visit("https://srpskainfo.com")
+}
+
+func setupSiArticlePageCrawler(crArticlePage *colly.Collector) {
+	crArticlePage.OnHTML("html", func(e *colly.HTMLElement) {
+
+		url := e.Request.URL.String()
+
+		title := ""
+		e.ForEachWithBreak("h1", func(_ int, el *colly.HTMLElement) bool {
+			title = el.Text
+			return false
+		})
+
+		text := ""
+
+		e.ForEach("p.article__top-content, p.article__content, h4.article__content, h3.article__content, h2.article__content, div.article__content", func(_ int, el *colly.HTMLElement) {
+			text += extractJustText(el.DOM)
+		})
+
+		article := model.ScrapedArticle{}
+
+		trimmedText := strings.TrimSpace(text)
+		article.OriginalUrl = url
+		article.Title = title
+		article.Content = trimmedText
+		article.SourceId = model.SrpskainfoSource
+		article.Slug = slug.Make(title)
+
+		SrpskainfoArticles <- article
+	})
+
+	crArticlePage.OnError(func(_ *colly.Response, _ error) {
+		fmt.Println("Problem crawling!")
+	})
+
+}