Live: pipeline rule crud (file-based, still for MVP) (#39238)

pkg/services/live/pipeline/pattern/pattern.go

@@ -0,0 +1,25 @@
+package pattern
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+var patternReString = `^[A-z0-9_\-/=.:*]*$`
+var patternRe = regexp.MustCompile(patternReString)
+
+var maxPatternLength = 160
+
+func Valid(pattern string) (bool, string) {
+	if strings.HasPrefix(pattern, "/") {
+		return false, "pattern can't start with /"
+	}
+	if !patternRe.MatchString(pattern) {
+		return false, fmt.Sprintf("pattern format error, must match %s", patternReString)
+	}
+	if len(pattern) > maxPatternLength {
+		return false, fmt.Sprintf("pattern max length exceeded (%d)", maxPatternLength)
+	}
+	return true, ""
+}

pkg/services/live/pipeline/pattern/pattern_test.go

@@ -0,0 +1,37 @@
+package pattern
+
+import "testing"
+
+func TestValid(t *testing.T) {
+	type args struct {
+		pattern string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "valid",
+			args: args{
+				pattern: "xxx",
+			},
+			want: true,
+		},
+		{
+			name: "invalid",
+			args: args{
+				pattern: "/xxx",
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, _ := Valid(tt.args.pattern)
+			if got != tt.want {
+				t.Errorf("Valid() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}