Migrate wrong datasource UIDs (#86598)

pkg/util/shortid_generator.go

@@ -30,7 +30,9 @@ var (
 var mtx sync.Mutex
 
 // Legacy UID pattern
-var validUIDPattern = regexp.MustCompile(`^[a-zA-Z0-9\-\_]*$`).MatchString
+var validUIDCharPattern = `a-zA-Z0-9\-\_`
+var validUIDPattern = regexp.MustCompile(`^[` + validUIDCharPattern + `]*$`).MatchString
+var validUIDReplacer = regexp.MustCompile(`[^` + validUIDCharPattern + `]`).ReplaceAllString
 
 // IsValidShortUID checks if short unique identifier contains valid characters
 // NOTE: future Grafana UIDs will need conform to https://github.com/kubernetes/apimachinery/blob/master/pkg/util/validation/validation.go#L43
@@ -91,3 +93,13 @@ func ValidateUID(uid string) error {
 	}
 	return nil
 }
+
+func AutofixUID(uid string) string {
+	if IsShortUIDTooLong(uid) {
+		return uid[:MaxUIDLength]
+	}
+	if !IsValidShortUID(uid) {
+		uid = validUIDReplacer(uid, "-")
+	}
+	return uid
+}