2 files changed, 44 insertions, 2 deletions
diff --git a/modules/templates/helper.go b/modules/templates/helper.go
index 94464fe628..8779de69ca 100644
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -9,6 +9,7 @@ import (
 	"html"
 	"html/template"
 	"net/url"
+	"reflect"
 	"slices"
 	"strings"
 	"time"
@@ -237,8 +238,8 @@ func DotEscape(raw string) string {
 
 // Iif is an "inline-if", similar util.Iif[T] but templates need the non-generic version,
 // and it could be simply used as "{{Iif expr trueVal}}" (omit the falseVal).
-func Iif(condition bool, vals ...any) any {
-	if condition {
+func Iif(condition any, vals ...any) any {
+	if IsTruthy(condition) {
 		return vals[0]
 	} else if len(vals) > 1 {
 		return vals[1]
@@ -246,6 +247,32 @@ func Iif(condition bool, vals ...any) any {
 	return nil
 }
 
+func IsTruthy(v any) bool {
+	if v == nil {
+		return false
+	}
+
+	rv := reflect.ValueOf(v)
+	switch rv.Kind() {
+	case reflect.Bool:
+		return rv.Bool()
+	case reflect.String:
+		return rv.String() != ""
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return rv.Int() != 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return rv.Uint() != 0
+	case reflect.Float32, reflect.Float64:
+		return rv.Float() != 0
+	case reflect.Slice, reflect.Array, reflect.Map:
+		return rv.Len() > 0
+	case reflect.Ptr:
+		return !rv.IsNil() && IsTruthy(reflect.Indirect(rv).Interface())
+	default:
+		return rv.Kind() == reflect.Struct && !rv.IsNil()
+	}
+}
+
 // Eval the expression and return the result, see the comment of eval.Expr for details.
 // To use this helper function in templates, pass each token as a separate parameter.
 //
diff --git a/modules/templates/helper_test.go b/modules/templates/helper_test.go
index 0cefb7a6b2..c6c70cc18e 100644
--- a/modules/templates/helper_test.go
+++ b/modules/templates/helper_test.go
@@ -65,3 +65,18 @@ func TestHTMLFormat(t *testing.T) {
 func TestSanitizeHTML(t *testing.T) {
 	assert.Equal(t, template.HTML(`<a href="/" rel="nofollow">link</a> xss <div>inline</div>`), SanitizeHTML(`<a href="/">link</a> <a href="javascript:">xss</a> <div style="dangerous">inline</div>`))
 }
+
+func TestIsTruthy(t *testing.T) {
+	var test any
+	assert.Equal(t, false, IsTruthy(test))
+	assert.Equal(t, false, IsTruthy(nil))
+	assert.Equal(t, false, IsTruthy(""))
+	assert.Equal(t, true, IsTruthy("non-empty"))
+	assert.Equal(t, true, IsTruthy(-1))
+	assert.Equal(t, false, IsTruthy(0))
+	assert.Equal(t, true, IsTruthy(42))
+	assert.Equal(t, false, IsTruthy(0.0))
+	assert.Equal(t, true, IsTruthy(3.14))
+	assert.Equal(t, false, IsTruthy([]int{}))
+	assert.Equal(t, true, IsTruthy([]int{1}))
+}