LibraryElements: Enables creating library elements with specific UID (#39019)

* LibraryPanels: Enables create/update library panels with specific UID

* Chore: added check for uid length after PR comments

* Refactor: creates IsShortUIDTooLong function

* Refactor: adds UID to PATCH endpoint

* Refactor: clarifies the patch code

* Refactor: changes  after PR comments

pkg/util/shortid_generator.go

@@ -20,6 +20,11 @@ func IsValidShortUID(uid string) bool {
 	return validUIDPattern(uid)
 }
 
+// IsShortUIDTooLong checks if short unique identifier is too long
+func IsShortUIDTooLong(uid string) bool {
+	return len(uid) > 40
+}
+
 // GenerateShortUID generates a short unique identifier.
 func GenerateShortUID() string {
 	return shortid.MustGenerate()

pkg/util/shortid_generator_test.go

@@ -1,6 +1,10 @@
 package util
 
-import "testing"
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
 
 func TestAllowedCharMatchesUidPattern(t *testing.T) {
 	for _, c := range allowedChars {
@@ -9,3 +13,33 @@ func TestAllowedCharMatchesUidPattern(t *testing.T) {
 		}
 	}
 }
+
+func TestIsShortUIDTooLong(t *testing.T) {
+	var tests = []struct {
+		name     string
+		uid      string
+		expected bool
+	}{
+		{
+			name:     "when the length of uid is longer than 40 chars then IsShortUIDTooLong should return true",
+			uid:      allowedChars,
+			expected: true,
+		},
+		{
+			name:     "when the length of uid is equal too 40 chars then IsShortUIDTooLong should return false",
+			uid:      "0123456789012345678901234567890123456789",
+			expected: false,
+		},
+		{
+			name:     "when the length of uid is shorter than 40 chars then IsShortUIDTooLong should return false",
+			uid:      "012345678901234567890123456789012345678",
+			expected: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			require.Equal(t, tt.expected, IsShortUIDTooLong(tt.uid))
+		})
+	}
+}