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package pongo2
type tagFirstofNode struct {
position *Token
args []IEvaluator
}
func (node *tagFirstofNode) Execute(ctx *ExecutionContext, writer TemplateWriter) *Error {
for _, arg := range node.args {
val, err := arg.Evaluate(ctx)
if err != nil {
return err
}
if val.IsTrue() {
if ctx.Autoescape && !arg.FilterApplied("safe") {
val, err = ApplyFilter("escape", val, nil)
if err != nil {
return err
}
}
writer.WriteString(val.String())
return nil
}
}
return nil
}
func tagFirstofParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
firstofNode := &tagFirstofNode{
position: start,
}
for arguments.Remaining() > 0 {
node, err := arguments.ParseExpression()
if err != nil {
return nil, err
}
firstofNode.args = append(firstofNode.args, node)
}
return firstofNode, nil
}
func init() {
RegisterTag("firstof", tagFirstofParser)
}
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