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package ace
import (
"bytes"
"fmt"
"io"
)
// helperMethodYield represents a helper method yield.
type helperMethodYield struct {
elementBase
templateName string
}
// WriteTo writes data to w.
func (e *helperMethodYield) WriteTo(w io.Writer) (int64, error) {
var bf bytes.Buffer
inner := e.src.inner
if inner == nil {
return 0, fmt.Errorf("inner is not specified [file: %s][line: %d]", e.ln.fileName(), e.ln.no)
}
var templateExists bool
for _, innerE := range e.rslt.inner {
ln := innerE.Base().ln
if ln.isHelperMethodOf(helperMethodNameContent) && len(ln.tokens) > 2 && ln.tokens[2] == e.templateName {
templateExists = true
break
}
}
if templateExists {
bf.WriteString(fmt.Sprintf(actionTemplateWithPipeline, e.opts.DelimLeft, inner.path+doubleColon+e.templateName, dot, e.opts.DelimRight))
} else {
// Write the children's HTML.
if i, err := e.writeChildren(&bf); err != nil {
return i, err
}
}
i, err := w.Write(bf.Bytes())
return int64(i), err
}
// newHelperMethodYield creates and returns a helper method yield.
func newHelperMethodYield(ln *line, rslt *result, src *source, parent element, opts *Options) (*helperMethodYield, error) {
if len(ln.tokens) < 3 {
return nil, fmt.Errorf("no template name is specified [file: %s][line: %d]", ln.fileName(), ln.no)
}
e := &helperMethodYield{
elementBase: newElementBase(ln, rslt, src, parent, opts),
templateName: ln.tokens[2],
}
return e, nil
}
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