initial

ytid.go

@@ -0,0 +1,45 @@
+package ytid
+
+import (
+	"fmt"
+	"regexp"
+)
+
+var (
+	regexpYoutubeDomain = regexp.MustCompile(`youtu\.?be`)
+	regexpURLPatterns   = []*regexp.Regexp{
+		regexp.MustCompile(`youtu\.be\/([^#\&\?]{11})`),
+		regexp.MustCompile(`\?v=([^#\&\?]{11})`),
+		regexp.MustCompile(`\&v=([^#\&\?]{11})`),
+		regexp.MustCompile(`embed\/([^#\&\?]{11})`),
+		regexp.MustCompile(`\/v\/([^#\&\?]{11})`),
+	}
+)
+
+func GetID(url string) string {
+	if !regexpYoutubeDomain.MatchString(url) {
+		return ""
+	}
+	for _, pattern := range regexpURLPatterns {
+		if pattern.MatchString(url) {
+			return pattern.FindStringSubmatch(url)[1]
+		}
+	}
+	return ""
+}
+
+func GetIDWithError(url string) (string, error) {
+	if !regexpYoutubeDomain.MatchString(url) {
+		return "", fmt.Errorf("ytid: not a youtube domain")
+	}
+	for _, pattern := range regexpURLPatterns {
+		if pattern.MatchString(url) {
+			return pattern.FindStringSubmatch(url)[1], nil
+		}
+	}
+	return "", fmt.Errorf("ytid: no match found")
+
+}
+
+/*
+ */