fix(05): CR-01 accept pointer and whole JSON numbers in integer rule

lagoon/validate.go

@@ -3,6 +3,7 @@ package lagoon
 import (
 	"context"
 	"fmt"
+	"math"
 	"math/big"
 	"reflect"
 	"regexp"
@@ -169,23 +170,36 @@ func isEmptyValue(val any) bool {
 	}
 }
 
+// isIntegerValue reports whether val is an integer in Laravel's sense. It
+// dereferences pointers (model fields such as *int) and accepts whole
+// floating-point numbers, the shape encoding/json gives a map[string]any.
 func isIntegerValue(val any) bool {
-	switch v := val.(type) {
-	case nil:
+	if val == nil {
 		return true
-	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
-		return true
-	case string:
-		if v == "" {
+	}
+	rv := reflect.ValueOf(val)
+	for rv.Kind() == reflect.Ptr || rv.Kind() == reflect.Interface {
+		if rv.IsNil() {
 			return true
 		}
-		_, ok := new(big.Int).SetString(v, 10)
+		rv = rv.Elem()
+	}
+	switch rv.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return true
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return true
+	case reflect.Float32, reflect.Float64:
+		f := rv.Float()
+		return f == math.Trunc(f) && !math.IsInf(f, 0)
+	case reflect.String:
+		s := rv.String()
+		if s == "" {
+			return true
+		}
+		_, ok := new(big.Int).SetString(s, 10)
 		return ok
 	default:
-		rv := reflect.ValueOf(val)
-		if rv.Kind() == reflect.Ptr && rv.IsNil() {
-			return true
-		}
 		return false
 	}
 }

lagoon/validate_test.go

@@ -30,6 +30,42 @@ func TestValidateBetweenYear(t *testing.T) {
 	}
 }
 
+func TestValidateIntegerPointerAndJSONNumber(t *testing.T) {
+	rules := map[string]string{"year": "nullable|integer|between:1889,2100"}
+	year := 1991
+	var nilYear *int
+	pass := map[string]any{
+		"*int":     &year,
+		"nil *int": nilYear,
+		"float64":  float64(1991),
+	}
+	for name, val := range pass {
+		errs, err := Validate(t.Context(), nil, nil, rules, map[string]any{"year": val}, nil)
+		if err != nil {
+			t.Fatalf("%s: %v", name, err)
+		}
+		if len(errs) != 0 {
+			t.Fatalf("%s must pass, got %v", name, errs)
+		}
+	}
+	early := 1700
+	fail := map[string]any{
+		"fractional float":  1991.5,
+		"out of range *int": &early,
+		"bool":              true,
+		"non-digit string":  "19x1",
+	}
+	for name, val := range fail {
+		errs, err := Validate(t.Context(), nil, nil, rules, map[string]any{"year": val}, nil)
+		if err != nil {
+			t.Fatalf("%s: %v", name, err)
+		}
+		if len(errs["year"]) == 0 {
+			t.Fatalf("%s must fail", name)
+		}
+	}
+}
+
 func TestValidateOneofQuotedSpace(t *testing.T) {
 	rules := map[string]string{"format": `nullable|in:LP,2LP,CD,2CD,MC,Box,EP 7"`}
 	errs, err := Validate(t.Context(), nil, nil, rules, map[string]any{"format": `EP 7"`}, nil)