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package intfns
import (
"fmt"
"github.com/ChrisTrenkamp/goxpath/tree"
"golang.org/x/text/language"
)
func boolean(c tree.Ctx, args ...tree.Result) (tree.Result, error) {
if b, ok := args[0].(tree.IsBool); ok {
return b.Bool(), nil
}
return nil, fmt.Errorf("Cannot convert object to a boolean")
}
func not(c tree.Ctx, args ...tree.Result) (tree.Result, error) {
b, ok := args[0].(tree.IsBool)
if !ok {
return nil, fmt.Errorf("Cannot convert object to a boolean")
}
return !b.Bool(), nil
}
func _true(c tree.Ctx, args ...tree.Result) (tree.Result, error) {
return tree.Bool(true), nil
}
func _false(c tree.Ctx, args ...tree.Result) (tree.Result, error) {
return tree.Bool(false), nil
}
func lang(c tree.Ctx, args ...tree.Result) (tree.Result, error) {
lStr := args[0].String()
var n tree.Elem
for _, i := range c.NodeSet {
if i.GetNodeType() == tree.NtElem {
n = i.(tree.Elem)
} else {
n = i.GetParent()
}
for n.GetNodeType() != tree.NtRoot {
if attr, ok := tree.GetAttribute(n, "lang", tree.XMLSpace); ok {
return checkLang(lStr, attr.Value), nil
}
n = n.GetParent()
}
}
return tree.Bool(false), nil
}
func checkLang(srcStr, targStr string) tree.Bool {
srcLang := language.Make(srcStr)
srcRegion, srcRegionConf := srcLang.Region()
targLang := language.Make(targStr)
targRegion, targRegionConf := targLang.Region()
if srcRegionConf == language.Exact && targRegionConf != language.Exact {
return tree.Bool(false)
}
if srcRegion != targRegion && srcRegionConf == language.Exact && targRegionConf == language.Exact {
return tree.Bool(false)
}
_, _, conf := language.NewMatcher([]language.Tag{srcLang}).Match(targLang)
return tree.Bool(conf >= language.High)
}
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