/
markdown.go
126 lines (108 loc) · 2.73 KB
/
markdown.go
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package renderer
import (
"bytes"
"context"
"html/template"
"io"
"sort"
"time"
"github.com/klingtnet/static-site-generator/generator/model"
"github.com/klingtnet/static-site-generator/internal"
"github.com/yuin/goldmark"
)
type Renderer interface {
Page(context.Context, io.Writer, TemplatePage, []model.MenuEntry) error
FeedPage(context.Context, io.Writer, TemplatePage) error
List(context.Context, io.Writer, model.Tree, []model.MenuEntry) error
}
// Markdown renders markdown pages to HTML websites.
type Markdown struct {
md goldmark.Markdown
templates *Templates
}
// NewMarkdown returns an instantiated markdown renderer.
func NewMarkdown(md goldmark.Markdown, templates *Templates) *Markdown {
return &Markdown{
md: md,
templates: templates,
}
}
// Page renders a single page.
func (m *Markdown) Page(
ctx context.Context,
w io.Writer,
page TemplatePage,
siteMenu []model.MenuEntry,
) error {
buf := bytes.NewBuffer(nil)
err := m.md.Convert(page.Markdown, buf)
if err != nil {
return err
}
data := TemplateData{
page.FM.Title, page.FM.Description,
template.HTML(buf.String()),
siteMenu,
}
return m.templates.Page.ExecuteTemplate(w, "base.gohtml", data)
}
// FeedPage renders a page for use in a feed.
func (m *Markdown) FeedPage(ctx context.Context, w io.Writer, page TemplatePage) error {
buf := bytes.NewBuffer(nil)
err := m.md.Convert(page.Markdown, buf)
if err != nil {
return err
}
data := TemplateData{
page.FM.Title, page.FM.Description,
template.HTML(buf.String()),
nil,
}
return m.templates.FeedPage.ExecuteTemplate(w, "feed.gohtml", data)
}
type TemplatePage struct {
Path string
FM model.FrontMatter
Markdown []byte
}
func NewTemplatePage(page *model.Page) TemplatePage {
return TemplatePage{
Path: page.Path(),
FM: *page.Frontmatter(),
Markdown: page.Content(),
}
}
// List renders a list, or directory overview, page.
func (m *Markdown) List(
ctx context.Context,
w io.Writer,
content model.Tree,
siteMenu []model.MenuEntry,
) error {
var pages []TemplatePage
for _, child := range content.Children() {
page, ok := child.(*model.Page)
if ok && !page.Frontmatter().Hidden {
pages = append(pages, NewTemplatePage(page))
}
}
// Sort pages by Date descending
sort.SliceStable(pages, func(i, j int) bool {
if pages[i].FM.CreatedAt == nil || pages[j].FM.CreatedAt == nil {
return false
}
return time.Time(*pages[i].FM.CreatedAt).After(time.Time(*pages[j].FM.CreatedAt))
})
data := TemplateData{
internal.TitleCase(content.Name()), "List of " + content.Name(),
struct {
Pages []TemplatePage
Dir string
}{
pages,
content.Path(),
},
siteMenu,
}
return m.templates.List.ExecuteTemplate(w, "base.gohtml", data)
}