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renderer.go
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/
renderer.go
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package jetr
import (
"errors"
"fmt"
"net/http"
"strings"
"github.com/CloudyKit/jet/v6"
"github.com/gin-gonic/gin/render"
)
type jetRenderer struct {
Set *jet.Set
}
func New(loader jet.Loader, opts ...jet.Option) *jetRenderer {
return &jetRenderer{jet.NewSet(loader, opts...)}
}
var _ render.HTMLRender = &jetRenderer{}
func (r *jetRenderer) Instance(name string, data any) render.Render {
return &renderInstance{
jetRenderer: r,
name: name,
data: data,
}
}
type renderInstance struct {
*jetRenderer
name string
data any
}
var _ render.Render = &renderInstance{}
func (r *renderInstance) render(w http.ResponseWriter) error {
if strings.ContainsRune(r.name, '#') {
splitted := strings.Split(r.name, "#")
if len(splitted) != 2 {
return errors.New("only one '#' is allowed in the template name as a template fragment")
}
templatePath := splitted[0]
blockName := splitted[1]
expr := fmt.Sprintf(`{{ import "%s" }} {{ yield %s() . }}`, templatePath, blockName)
t, err := r.Set.Parse(templatePath, expr)
if err != nil {
return fmt.Errorf("failed to parse expr '%s': %w", expr, err)
}
return t.Execute(w, nil, r.data)
}
t, err := r.Set.GetTemplate(r.name)
if err != nil {
return err
}
return t.Execute(w, nil, r.data)
}
func (r *renderInstance) Render(w http.ResponseWriter) error {
if err := r.render(w); err != nil {
w.WriteHeader(http.StatusInternalServerError)
return err
}
w.WriteHeader(http.StatusOK)
return nil
}
func (*renderInstance) WriteContentType(w http.ResponseWriter) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
}