forked from oal/beego-pongo2
/
tags_urlfor.go
58 lines (47 loc) · 1.37 KB
/
tags_urlfor.go
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package pongo2
import (
"bytes"
"github.com/astaxie/beego"
p2 "gopkg.in/flosch/pongo2.v3"
)
type tagURLForNode struct {
objectEvaluators []p2.IEvaluator
}
func (node *tagURLForNode) Execute(ctx *p2.ExecutionContext, buffer *bytes.Buffer) *p2.Error {
args := make([]string, len(node.objectEvaluators))
for i, ev := range node.objectEvaluators {
obj, err := ev.Evaluate(ctx)
if err != nil {
return err
}
args[i] = obj.String()
}
params := make([]interface{}, len(args)-1)
for i := range params {
params[i] = args[i+1]
}
url := beego.UrlFor(args[0], params...)
buffer.WriteString(url)
return nil
}
// tagURLForParser implements a {% urlfor %} tag.
//
// urlfor takes one argument for the controller, as well as any number of key/value pairs for additional URL data.
// Example: {% urlfor "UserController.View" ":slug" "oal" %}
func tagURLForParser(doc *p2.Parser, start *p2.Token, arguments *p2.Parser) (p2.INodeTag, *p2.Error) {
evals := []p2.IEvaluator{}
for arguments.Remaining() > 0 {
expr, err := arguments.ParseExpression()
evals = append(evals, expr)
if err != nil {
return nil, err
}
}
if (len(evals)-1)%2 != 0 {
return nil, arguments.Error("URL takes one argument for the controller and any number of optional pairs of key/value pairs.", nil)
}
return &tagURLForNode{evals}, nil
}
func init() {
p2.RegisterTag("urlfor", tagURLForParser)
}