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Backport Iif (#31353)

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wxiaoguang 2024-06-13 14:52:34 +08:00 committed by GitHub
parent 6d0d4640f6
commit cdd057c7a3
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GPG key ID: B5690EEEBB952194
2 changed files with 70 additions and 2 deletions

View file

@ -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 isTemplateTruthy(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 isTemplateTruthy(v any) bool {
if v == nil {
return false
}
rv := reflect.ValueOf(v)
switch rv.Kind() {
case reflect.Bool:
return rv.Bool()
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.Complex64, reflect.Complex128:
return rv.Complex() != 0
case reflect.String, reflect.Slice, reflect.Array, reflect.Map:
return rv.Len() > 0
case reflect.Struct:
return true
default:
return !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.
//

View file

@ -5,8 +5,11 @@ package templates
import (
"html/template"
"strings"
"testing"
"code.gitea.io/gitea/modules/util"
"github.com/stretchr/testify/assert"
)
@ -65,3 +68,41 @@ 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 TestTemplateTruthy(t *testing.T) {
tmpl := template.New("test")
tmpl.Funcs(template.FuncMap{"Iif": Iif})
template.Must(tmpl.Parse(`{{if .Value}}true{{else}}false{{end}}:{{Iif .Value "true" "false"}}`))
cases := []any{
nil, false, true, "", "string", 0, 1,
byte(0), byte(1), int64(0), int64(1), float64(0), float64(1),
complex(0, 0), complex(1, 0),
(chan int)(nil), make(chan int),
(func())(nil), func() {},
util.ToPointer(0), util.ToPointer(util.ToPointer(0)),
util.ToPointer(1), util.ToPointer(util.ToPointer(1)),
[0]int{},
[1]int{0},
[]int(nil),
[]int{},
[]int{0},
map[any]any(nil),
map[any]any{},
map[any]any{"k": "v"},
(*struct{})(nil),
struct{}{},
util.ToPointer(struct{}{}),
}
w := &strings.Builder{}
truthyCount := 0
for i, v := range cases {
w.Reset()
assert.NoError(t, tmpl.Execute(w, struct{ Value any }{v}), "case %d (%T) %#v fails", i, v, v)
out := w.String()
truthyCount += util.Iif(out == "true:true", 1, 0)
truthyMatches := out == "true:true" || out == "false:false"
assert.True(t, truthyMatches, "case %d (%T) %#v fail: %s", i, v, v, out)
}
assert.True(t, truthyCount != 0 && truthyCount != len(cases))
}