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handler.go
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handler.go
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package extensions
import (
"bytes"
"fmt"
"html/template"
"github.com/Nigel2392/router/v3/request"
)
// View returns a view that renders the extension into the base template.
func View(options *Options, ext Extension) func(r *request.Request) {
return func(r *request.Request) {
var err error
var buf bytes.Buffer
var tdata = ext.View(r)
var tmpl *template.Template
switch ext := ext.(type) {
case ExtensionWithTemplate:
tmpl = ext.Template(r)
options.render(&buf, ext, tmpl.Tree.Root.String())
case ExtensionWithStrings:
options.render(&buf, ext, ext.String(r))
case ExtensionWithFilename:
tmpl, err = template.ParseFS(options.ExtensionManager.TEMPLATEFS, ext.Filename())
if err != nil {
defaultErr(options, r, err)
return
}
options.render(&buf, ext, tmpl.Tree.Root.String())
default:
var errString = fmt.Sprintf("Extension %s does not implement any of the extension interfaces", ext.Name())
r.Error(500, errString)
panic(errString)
}
t, err := options.BaseManager.GetFromString(buf.String(), "ext")
if err != nil {
defaultErr(options, r, err)
return
}
base, err := options.BaseManager.GetBases(nil)
if err != nil {
defaultErr(options, r, err)
return
}
for _, b := range base.Templates() {
t.AddParseTree(b.Name(), b.Tree)
}
t.Funcs(options.BaseManager.DEFAULT_FUNCS)
t.Funcs(options.ExtensionManager.DEFAULT_FUNCS)
for k, v := range tdata {
r.Data.Set(k, v)
}
if options.BeforeRender != nil {
options.BeforeRender(r, t)
}
err = t.Execute(r, r.Data)
if err != nil {
defaultErr(options, r, err)
return
}
}
}
func defaultErr(o *Options, r *request.Request, err error) {
if o.OnError != nil {
o.OnError(r, err)
} else {
r.Error(500, err.Error())
}
}