forked from ghetzel/diecast
/
renderers.go
70 lines (58 loc) · 1.56 KB
/
renderers.go
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package diecast
import (
"fmt"
"io"
"net/http"
"path/filepath"
"strings"
"time"
)
var renderers = make(map[string]Renderer)
func init() {
RegisterRenderer(`pdf`, new(PdfRenderer))
RegisterRenderer(`markdown`, new(MarkdownRenderer))
RegisterRenderer(`sass`, new(SassRenderer))
RegisterRenderer(`html`, new(TemplateRenderer))
RegisterRenderer(``, new(TemplateRenderer))
}
type RenderOptions struct {
Header *TemplateHeader
HeaderOffset int
FunctionSet FuncMap
Input io.ReadCloser
Fragments FragmentSet
Data map[string]interface{}
MimeType string
RequestedPath string
Timeout time.Duration
}
type PrewriteFunc func(*http.Request)
type Renderer interface {
SetPrewriteFunc(PrewriteFunc)
SetServer(*Server)
Render(w http.ResponseWriter, req *http.Request, options RenderOptions) error
ShouldPrerender() bool
}
func RegisterRenderer(name string, renderer Renderer) {
renderers[name] = renderer
}
func GetRenderer(name string, server *Server) (Renderer, error) {
if renderer, ok := renderers[name]; ok && renderer != nil {
renderer.SetServer(server)
return renderer, nil
} else {
return nil, fmt.Errorf("Unknown renderer %q", name)
}
}
func GetRendererForFilename(filename string, server *Server) (Renderer, bool) {
if server != nil && len(server.RendererMappings) > 0 {
var ext = filepath.Ext(filename)
ext = strings.TrimPrefix(ext, `.`)
if rname, ok := server.RendererMappings[ext]; ok {
if renderer, err := GetRenderer(rname, server); err == nil {
return renderer, true
}
}
}
return nil, false
}