From 48a3a6e79d026a877da66be5ad0bfafa86d9ca47 Mon Sep 17 00:00:00 2001
From: Darko Luketic <info@icod.de>
Date: Mon, 1 Jul 2019 15:47:29 +0200
Subject: [PATCH] initial

---
 LICENCE      |  9 +++++++++
 README.md    |  0
 ytid.go      | 45 +++++++++++++++++++++++++++++++++++++++++++++
 ytid_test.go | 31 +++++++++++++++++++++++++++++++
 4 files changed, 85 insertions(+)
 create mode 100644 LICENCE
 create mode 100644 README.md
 create mode 100644 ytid.go
 create mode 100644 ytid_test.go

diff --git a/LICENCE b/LICENCE
new file mode 100644
index 0000000..f01bb94
--- /dev/null
+++ b/LICENCE
@@ -0,0 +1,9 @@
+MIT License
+
+Copyright (c) 2019 Darko Luketic
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e69de29
diff --git a/ytid.go b/ytid.go
new file mode 100644
index 0000000..8e5e1e3
--- /dev/null
+++ b/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")
+
+}
+
+/*
+ */
diff --git a/ytid_test.go b/ytid_test.go
new file mode 100644
index 0000000..55cb512
--- /dev/null
+++ b/ytid_test.go
@@ -0,0 +1,31 @@
+package ytid
+
+import (
+	"testing"
+)
+
+func TestGetID(t *testing.T) {
+	inputs := []string{
+		"https://www.youtube.com/watch?v=m4U232MuTG4",
+		"https://youtu.be/dVtehSbLO8M",
+		"https://www.youtube.com/embed/Kt-tLuszKBA",
+	}
+
+	for n, i := range inputs {
+		switch n {
+		case 0:
+			if GetID(i) != "m4U232MuTG4" {
+				t.Fatal("failed", n)
+			}
+		case 1:
+			if GetID(i) != "dVtehSbLO8M" {
+				t.Fatal("failed", n)
+			}
+		case 2:
+			if GetID(i) != "Kt-tLuszKBA" {
+				t.Fatal("failed", n)
+			}
+
+		}
+	}
+}