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renderer.go
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renderer.go
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package blogrenderer
import (
"embed"
"github.com/gomarkdown/markdown"
"github.com/gomarkdown/markdown/parser"
"html/template"
"io"
)
var (
//go:embed "templates/*"
postTemplates embed.FS
)
// PostRenderer renders data into HTML
type PostRenderer struct {
templ *template.Template
mdParser *parser.Parser
}
// NewPostRenderer creates a new PostRenderer
func NewPostRenderer() (*PostRenderer, error) {
templ, err := template.ParseFS(postTemplates, "templates/*.gohtml")
if err != nil {
return nil, err
}
extensions := parser.CommonExtensions | parser.AutoHeadingIDs
parser := parser.NewWithExtensions(extensions)
return &PostRenderer{templ: templ, mdParser: parser}, nil
}
// Render renders post into HTML
func (r *PostRenderer) Render(w io.Writer, p Post) error {
return r.templ.ExecuteTemplate(w, "blog.gohtml", newPostVM(p, r))
}
// RenderIndex creates an HTML index page given a collection of posts
func (r *PostRenderer) RenderIndex(w io.Writer, posts []Post) error {
return r.templ.ExecuteTemplate(w, "index.gohtml", posts)
}
type postViewModel struct {
Post
HTMLBody template.HTML
}
func newPostVM(p Post, r *PostRenderer) postViewModel {
vm := postViewModel{Post: p}
vm.HTMLBody = template.HTML(markdown.ToHTML([]byte(p.Body), r.mdParser, nil))
return vm
}