Added utils for url parsing

utils/match.go

@@ -0,0 +1,44 @@
+package utils
+
+import "regexp"
+
+// MatchVideo tries to extract the crunchyroll series / movie name out of the given url
+func MatchVideo(url string) (seriesName string, ok bool) {
+	pattern := regexp.MustCompile(`(?m)^https?://(www\.)?crunchyroll\.com(/\w{2}(-\w{2})?)?/(?P<series>[^/]+)/?$`)
+	if urlMatch := pattern.FindAllStringSubmatch(url, -1); len(urlMatch) != 0 {
+		groups := regexGroups(urlMatch, pattern.SubexpNames()...)
+		seriesName = groups["series"]
+
+		if seriesName != "" {
+			ok = true
+		}
+	}
+	return
+}
+
+// MatchEpisode tries to extract the crunchyroll series name and title out of the given url
+func MatchEpisode(url string) (seriesName, title string, ok bool) {
+	pattern := regexp.MustCompile(`(?m)^https?://(www\.)?crunchyroll\.com(/\w{2}(-\w{2})?)?/(?P<series>[^/]+)/episode-\d+-(?P<title>\D+).*`)
+	if urlMatch := pattern.FindAllStringSubmatch(url, -1); len(urlMatch) != 0 {
+		groups := regexGroups(urlMatch, pattern.SubexpNames()...)
+		seriesName = groups["series"]
+		title = groups["title"]
+
+		if seriesName != "" && title != "" {
+			ok = true
+		}
+	}
+	return
+}
+
+func regexGroups(parsed [][]string, subexpNames ...string) map[string]string {
+	groups := map[string]string{}
+	for _, match := range parsed {
+		for i, content := range match {
+			if subexpName := subexpNames[i]; subexpName != "" {
+				groups[subexpName] = content
+			}
+		}
+	}
+	return groups
+}