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ferret/pkg/stdlib/html/element.go
2018-09-18 16:42:38 -04:00

52 lines
1.2 KiB
Go

package html
import (
"context"
"github.com/MontFerret/ferret/pkg/runtime/core"
"github.com/MontFerret/ferret/pkg/runtime/values"
)
func Element(_ context.Context, inputs ...core.Value) (core.Value, error) {
el, selector, err := elementArgs(inputs)
if err != nil {
return values.None, err
}
return el.QuerySelector(selector), nil
}
func Elements(_ context.Context, inputs ...core.Value) (core.Value, error) {
el, selector, err := elementArgs(inputs)
if err != nil {
return values.None, err
}
return el.QuerySelectorAll(selector), nil
}
func elementArgs(inputs []core.Value) (values.HtmlNode, values.String, error) {
if len(inputs) == 0 {
return nil, values.EmptyString, core.Error(core.ErrMissedArgument, "element and arg2")
}
if len(inputs) == 1 {
return nil, values.EmptyString, core.Error(core.ErrMissedArgument, "arg2")
}
arg1 := inputs[0]
arg2 := inputs[1]
if arg1.Type() != core.HtmlDocumentType &&
arg1.Type() != core.HtmlElementType {
return nil, values.EmptyString, core.TypeError(arg1.Type(), core.HtmlDocumentType, core.HtmlElementType)
}
if arg2.Type() != core.StringType {
return nil, values.EmptyString, core.TypeError(arg2.Type(), core.StringType)
}
return arg1.(values.HtmlNode), arg2.(values.String), nil
}