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Backport Iif (#31353)
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commit
cdd057c7a3
2 changed files with 70 additions and 2 deletions
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@ -9,6 +9,7 @@ import (
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"html"
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"html/template"
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"net/url"
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"reflect"
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"slices"
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"strings"
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"time"
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@ -237,8 +238,8 @@ func DotEscape(raw string) string {
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// Iif is an "inline-if", similar util.Iif[T] but templates need the non-generic version,
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// and it could be simply used as "{{Iif expr trueVal}}" (omit the falseVal).
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func Iif(condition bool, vals ...any) any {
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if condition {
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func Iif(condition any, vals ...any) any {
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if isTemplateTruthy(condition) {
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return vals[0]
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} else if len(vals) > 1 {
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return vals[1]
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@ -246,6 +247,32 @@ func Iif(condition bool, vals ...any) any {
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return nil
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}
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func isTemplateTruthy(v any) bool {
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if v == nil {
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return false
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}
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rv := reflect.ValueOf(v)
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switch rv.Kind() {
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case reflect.Bool:
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return rv.Bool()
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return rv.Int() != 0
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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return rv.Uint() != 0
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case reflect.Float32, reflect.Float64:
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return rv.Float() != 0
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case reflect.Complex64, reflect.Complex128:
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return rv.Complex() != 0
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case reflect.String, reflect.Slice, reflect.Array, reflect.Map:
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return rv.Len() > 0
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case reflect.Struct:
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return true
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default:
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return !rv.IsNil()
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}
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}
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// Eval the expression and return the result, see the comment of eval.Expr for details.
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// To use this helper function in templates, pass each token as a separate parameter.
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//
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@ -5,8 +5,11 @@ package templates
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import (
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"html/template"
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"strings"
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"testing"
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"code.gitea.io/gitea/modules/util"
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"github.com/stretchr/testify/assert"
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)
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@ -65,3 +68,41 @@ func TestHTMLFormat(t *testing.T) {
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func TestSanitizeHTML(t *testing.T) {
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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>`))
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}
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func TestTemplateTruthy(t *testing.T) {
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tmpl := template.New("test")
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tmpl.Funcs(template.FuncMap{"Iif": Iif})
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template.Must(tmpl.Parse(`{{if .Value}}true{{else}}false{{end}}:{{Iif .Value "true" "false"}}`))
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cases := []any{
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nil, false, true, "", "string", 0, 1,
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byte(0), byte(1), int64(0), int64(1), float64(0), float64(1),
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complex(0, 0), complex(1, 0),
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(chan int)(nil), make(chan int),
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(func())(nil), func() {},
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util.ToPointer(0), util.ToPointer(util.ToPointer(0)),
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util.ToPointer(1), util.ToPointer(util.ToPointer(1)),
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[0]int{},
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[1]int{0},
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[]int(nil),
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[]int{},
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[]int{0},
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map[any]any(nil),
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map[any]any{},
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map[any]any{"k": "v"},
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(*struct{})(nil),
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struct{}{},
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util.ToPointer(struct{}{}),
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}
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w := &strings.Builder{}
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truthyCount := 0
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for i, v := range cases {
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w.Reset()
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assert.NoError(t, tmpl.Execute(w, struct{ Value any }{v}), "case %d (%T) %#v fails", i, v, v)
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out := w.String()
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truthyCount += util.Iif(out == "true:true", 1, 0)
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truthyMatches := out == "true:true" || out == "false:false"
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assert.True(t, truthyMatches, "case %d (%T) %#v fail: %s", i, v, v, out)
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}
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assert.True(t, truthyCount != 0 && truthyCount != len(cases))
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}
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