1 files changed, 47 insertions, 0 deletions
diff --git a/pkg/names/gender.go b/pkg/names/gender.go
new file mode 100644
index 0000000..bdd16e1
--- /dev/null
+++ b/pkg/names/gender.go
@@ -0,0 +1,47 @@
+package names
+
+import (
+	"airlines/pkg/model"
+	"strings"
+	"unicode"
+)
+
+func normalizeTitle(x string) string {
+	x = strings.ToLower(x)
+	// strip common punctuation
+	x = strings.ReplaceAll(x, ".", "")
+	x = strings.ReplaceAll(x, "'", "")
+	x = strings.ReplaceAll(x, "’", "")
+	x = strings.ReplaceAll(x, "-", "")
+	return x
+}
+
+func GenderFromTitle(s string) model.Sex {
+	if s == "" {
+		return model.SexUnknown
+	}
+	// only first token (before space/comma/slash/etc.)
+	cut := func(r rune) bool { return unicode.IsSpace(r) || r == ',' || r == '/' || r == '&' }
+	first := strings.FieldsFunc(s, cut)
+	if len(first) == 0 {
+		return model.SexUnknown
+	}
+	t := normalizeTitle(first[0])
+
+	// male honorifics
+	switch t {
+	case "mr", "sir", "lord", "monsieur", "m", "don", "senor", "sr": // "sr" may collide with "senior"; context needed
+		return model.SexMale
+	}
+
+	// female honorifics
+	switch t {
+	case "mrs", "miss", "ms", "madam", "madame", "mademoiselle", "mlle",
+		"lady", "dame", "senora", "sra", "señora", "srta", "srita", "dona":
+		return model.SexFemale
+	}
+
+	// neutral/ambiguous titles (return Unknown)
+	// e.g., "mx", "dr", "prof", "rev", "coach", "officer", etc.
+	return model.SexUnknown
+}