From 8f07f6f4d7e91a9e4b7164a39759907fac5fb8a1 Mon Sep 17 00:00:00 2001
From: Keuin <keuinx@gmail.com>
Date: Sat, 1 Jul 2023 22:06:01 +0800
Subject: Refactor: encapsulate custom url manipulation function into object
 method.

---
 common/myurl/urlparse.go      | 27 +++++++++++++++++++++++++++
 common/myurl/urlparse_test.go | 32 ++++++++++++++++++++++++++++++++
 common/urlparse.go            | 21 ---------------------
 common/urlparse_test.go       | 32 --------------------------------
 4 files changed, 59 insertions(+), 53 deletions(-)
 create mode 100644 common/myurl/urlparse.go
 create mode 100644 common/myurl/urlparse_test.go
 delete mode 100644 common/urlparse.go
 delete mode 100644 common/urlparse_test.go

(limited to 'common')

diff --git a/common/myurl/urlparse.go b/common/myurl/urlparse.go
new file mode 100644
index 0000000..69695d1
--- /dev/null
+++ b/common/myurl/urlparse.go
@@ -0,0 +1,27 @@
+package myurl
+
+import (
+	"errors"
+	"net/url"
+	"strings"
+)
+
+type Url string
+
+func (o Url) Url() string {
+	return string(o)
+}
+
+// FileExtension returns file extension of file name from this url.
+// copied from https://elisegev.medium.com/get-a-file-extension-from-a-url-in-golang-5061d4a298a
+func (o Url) FileExtension() (string, error) {
+	u, err := url.Parse(o.Url())
+	if err != nil {
+		return "", err
+	}
+	pos := strings.LastIndex(u.Path, ".")
+	if pos == -1 {
+		return "", errors.New("couldn't find a period to indicate a file extension")
+	}
+	return u.Path[pos+1 : len(u.Path)], nil
+}
diff --git a/common/myurl/urlparse_test.go b/common/myurl/urlparse_test.go
new file mode 100644
index 0000000..b7df7bd
--- /dev/null
+++ b/common/myurl/urlparse_test.go
@@ -0,0 +1,32 @@
+package myurl
+
+import "testing"
+
+func TestGetFileExtensionFromUrl(t *testing.T) {
+	tests := []struct {
+		Expected string
+		Actual   string
+	}{
+		{Expected: "html"},
+		{Expected: "htm"},
+		{Expected: "flv"},
+	}
+	var err error
+	tests[0].Actual, err = Url("http://www.example.com/index.html").FileExtension()
+	if err != nil {
+		t.Fatalf("GetFileExtensionFromUrl: %v", err)
+	}
+	tests[1].Actual, err = Url("https://www.example.com/index.htm").FileExtension()
+	if err != nil {
+		t.Fatalf("GetFileExtensionFromUrl: %v", err)
+	}
+	tests[2].Actual, err = Url("https://www.example.com/video.flv?a=1&b=2flv").FileExtension()
+	if err != nil {
+		t.Fatalf("GetFileExtensionFromUrl: %v", err)
+	}
+	for i, tc := range tests {
+		if tc.Expected != tc.Actual {
+			t.Fatalf("Test %v failed: %v", i, tc)
+		}
+	}
+}
diff --git a/common/urlparse.go b/common/urlparse.go
deleted file mode 100644
index dc72cee..0000000
--- a/common/urlparse.go
+++ /dev/null
@@ -1,21 +0,0 @@
-package common
-
-import (
-	"errors"
-	"net/url"
-	"strings"
-)
-
-// GetFileExtensionFromUrl
-// copied from https://elisegev.medium.com/get-a-file-extension-from-a-url-in-golang-5061d4a298a
-func GetFileExtensionFromUrl(rawUrl string) (string, error) {
-	u, err := url.Parse(rawUrl)
-	if err != nil {
-		return "", err
-	}
-	pos := strings.LastIndex(u.Path, ".")
-	if pos == -1 {
-		return "", errors.New("couldn't find a period to indicate a file extension")
-	}
-	return u.Path[pos+1 : len(u.Path)], nil
-}
diff --git a/common/urlparse_test.go b/common/urlparse_test.go
deleted file mode 100644
index 9ed4449..0000000
--- a/common/urlparse_test.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package common
-
-import "testing"
-
-func TestGetFileExtensionFromUrl(t *testing.T) {
-	tests := []struct {
-		Expected string
-		Actual   string
-	}{
-		{Expected: "html"},
-		{Expected: "htm"},
-		{Expected: "flv"},
-	}
-	var err error
-	tests[0].Actual, err = GetFileExtensionFromUrl("http://www.example.com/index.html")
-	if err != nil {
-		t.Fatalf("GetFileExtensionFromUrl: %v", err)
-	}
-	tests[1].Actual, err = GetFileExtensionFromUrl("https://www.example.com/index.htm")
-	if err != nil {
-		t.Fatalf("GetFileExtensionFromUrl: %v", err)
-	}
-	tests[2].Actual, err = GetFileExtensionFromUrl("https://www.example.com/video.flv?a=1&b=2flv")
-	if err != nil {
-		t.Fatalf("GetFileExtensionFromUrl: %v", err)
-	}
-	for i, tc := range tests {
-		if tc.Expected != tc.Actual {
-			t.Fatalf("Test %v failed: %v", i, tc)
-		}
-	}
-}
-- 
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