Settings: Use PHOTOPRISM_DISABLE_FEATURES to initialize default features

Signed-off-by: Michael Mayer <michael@photoprism.app>

pkg/clean/fieldname.go

@@ -0,0 +1,35 @@
+package clean
+
+import (
+	"strings"
+)
+
+// FieldName normalizes a struct field identifier so it can be compared safely.
+// It strips all characters outside [A-Za-z0-9], rejects empty strings, and
+// returns an empty string for inputs longer than 255 bytes to avoid abuse.
+func FieldName(s string) string {
+	if s == "" || len(s) > 255 {
+		return ""
+	}
+
+	// Remove all invalid characters.
+	s = strings.Map(func(r rune) rune {
+		if (r < '0' || r > '9') && (r < 'a' || r > 'z') && (r < 'A' || r > 'Z') {
+			return -1
+		}
+
+		return r
+	}, s)
+
+	return s
+}
+
+// FieldNameLower normalizes a struct field identifier and lowercases it first.
+// Useful when callers want case-insensitive comparisons against normalized data.
+func FieldNameLower(s string) string {
+	if s == "" || len(s) > 255 {
+		return ""
+	}
+
+	return FieldName(strings.ToLower(s))
+}

pkg/clean/fieldname_test.go

@@ -0,0 +1,49 @@
+package clean
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFieldName(t *testing.T) {
+	tests := []struct {
+		name string
+		in   string
+		want string
+	}{
+		{name: "Path", in: "/go/src/github.com/photoprism/photoprism", want: "gosrcgithubcomphotoprismphotoprism"},
+		{name: "DotsAndUpper", in: "filename.TXT", want: "filenameTXT"},
+		{name: "SpacesAndPunctuation", in: "The quick brown fox.", want: "Thequickbrownfox"},
+		{name: "QuestionAndDot", in: "file?name.jpg", want: "filenamejpg"},
+		{name: "ControlCharacter", in: "filename." + string(rune(127)), want: "filename"},
+		{name: "Empty", in: "", want: ""},
+		{name: "TooLong", in: strings.Repeat("a", 256), want: ""},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, FieldName(tt.in))
+		})
+	}
+}
+
+func TestFieldNameLower(t *testing.T) {
+	tests := []struct {
+		name string
+		in   string
+		want string
+	}{
+		{name: "LowerCase", in: "file?name.JPG", want: "filenamejpg"},
+		{name: "UpperOnly", in: "ABC", want: "abc"},
+		{name: "MixedSeparators", in: "Album-Photos_123", want: "albumphotos123"},
+		{name: "TooLong", in: strings.Repeat("B", 300), want: ""},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, FieldNameLower(tt.in))
+		})
+	}
+}