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link.go
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link.go
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package popularity
import (
"net/url"
"regexp"
"strings"
)
var (
dqLinkMatcher = regexp.MustCompile(`<a .*?href="(.*?)".*?>.*?</a>`)
sqLinkMatcher = regexp.MustCompile(`<a .*?href='(.*?)'.*?>.*?</a>`)
)
func realLink(link, text string) string {
u, err := url.Parse(link)
if err != nil {
return ""
}
u.RawQuery = ""
link = u.String()
if link, ok := processReddit(link, text); ok {
return link
}
return link
}
func processReddit(link, text string) (string, bool) {
if strings.Contains(link, "://reddit.com/r") || strings.Contains(link, "://www.reddit.com/r") {
res := dqLinkMatcher.FindAllStringSubmatch(text, -1)
for _, l := range res {
if checkRedditLink(l[1], link) {
return l[1], true
}
}
res = sqLinkMatcher.FindAllStringSubmatch(text, -1)
for _, l := range res {
if checkRedditLink(l[1], link) {
return l[1], true
}
}
}
return "", false
}
func checkRedditLink(link, original string) bool {
if strings.Contains(link, "reddit.com/user") {
return false
}
if strings.Contains(link, "reddit.com/") && strings.Contains(link, "/comments/") {
return false
}
if link != original {
return true
}
return false
}