feat: support custom tracker url (#59)

pkg/util/json.go

@@ -0,0 +1,14 @@
+package util
+
+import "encoding/json"
+
+func MapToStruct(s any, v any) error {
+	if s == nil {
+		return nil
+	}
+	b, err := json.Marshal(s)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(b, v)
+}

pkg/util/url_test.go

@@ -0,0 +1,50 @@
+package util
+
+import "testing"
+
+func TestParseSchema(t *testing.T) {
+	type args struct {
+		url string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "http",
+			args: args{
+				url: "http://www.google.com",
+			},
+			want: "HTTP",
+		},
+		{
+			name: "https",
+			args: args{
+				url: "https://www.google.com",
+			},
+			want: "HTTPS",
+		},
+		{
+			name: "file",
+			args: args{
+				url: "file:///home/bt.torrent",
+			},
+			want: "FILE",
+		},
+		{
+			name: "file-no-scheme",
+			args: args{
+				url: "/home/bt.torrent",
+			},
+			want: "FILE",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := ParseSchema(tt.args.url); got != tt.want {
+				t.Errorf("ParseSchema() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}