From 27f92894b50ffc2058c1b2f0db4d78d47a48c843 Mon Sep 17 00:00:00 2001 From: Alan Pearce Date: Wed, 24 Apr 2024 13:36:57 +0200 Subject: split code into separate files --- cmd/build/template.go | 275 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 275 insertions(+) create mode 100644 cmd/build/template.go (limited to 'cmd/build/template.go') diff --git a/cmd/build/template.go b/cmd/build/template.go new file mode 100644 index 0000000..5ea1912 --- /dev/null +++ b/cmd/build/template.go @@ -0,0 +1,275 @@ +package main + +import ( + "encoding/xml" + "fmt" + "io" + "log/slog" + "net/url" + "os" + "strings" + "time" + "website/internal/atom" + "website/internal/config" + + "github.com/PuerkitoBio/goquery" + "github.com/a-h/htmlformat" + "github.com/antchfx/xmlquery" + "github.com/antchfx/xpath" + mapset "github.com/deckarep/golang-set/v2" + "golang.org/x/net/html" +) + +func layout(filename string, config config.Config, pageTitle string) (*goquery.Document, error) { + html, err := os.Open(filename) + if err != nil { + return nil, err + } + defer html.Close() + css, err := os.ReadFile("templates/style.css") + if err != nil { + return nil, err + } + doc, err := goquery.NewDocumentFromReader(html) + if err != nil { + return nil, err + } + doc.Find("html").SetAttr("lang", config.DefaultLanguage) + doc.Find("head > link[rel=alternate]").SetAttr("title", config.Title) + doc.Find(".title").SetText(config.Title) + doc.Find("title").Add(".p-name").SetText(pageTitle) + doc.Find("head > style").SetHtml("\n" + string(css)) + nav := doc.Find("nav") + navLink := doc.Find("nav a") + nav.Empty() + for _, link := range config.Menus["main"] { + nav.AppendSelection(navLink.Clone().SetAttr("href", link.URL).SetText(link.Name)) + } + return doc, nil +} + +func renderPost(post Post, config config.Config) (r io.Reader, err error) { + doc, err := layout("templates/post.html", config, post.PostMatter.Title) + if err != nil { + return nil, err + } + doc.Find(".title").AddClass("p-author h-card").SetAttr("rel", "author") + doc.Find(".h-entry .dt-published"). + SetAttr("datetime", post.PostMatter.Date.UTC().Format(time.RFC3339)). + SetText( + post.PostMatter.Date.Format("2006-01-02"), + ) + doc.Find(".h-entry .e-content").SetHtml(post.Content) + categories := doc.Find(".h-entry .p-categories") + tpl := categories.Find(".p-category").ParentsUntilSelection(categories) + tpl.Remove() + for _, tag := range post.Taxonomies.Tags { + cat := tpl.Clone() + cat.Find(".p-category").SetAttr("href", fmt.Sprintf("/tags/%s/", tag)).SetText("#" + tag) + categories.AppendSelection(cat) + } + + return renderHTML(doc), nil +} + +func renderTags(tags Tags, config config.Config) (io.Reader, error) { + doc, err := layout("templates/tags.html", config, config.Title) + if err != nil { + return nil, err + } + tagList := doc.Find(".tags") + tpl := doc.Find(".h-feed") + tpl.Remove() + for _, tag := range mapset.Sorted(tags) { + li := tpl.Clone() + li.Find("a").SetAttr("href", fmt.Sprintf("/tags/%s/", tag)).SetText("#" + tag) + tagList.AppendSelection(li) + } + return renderHTML(doc), nil +} + +func renderListPage(tag string, config config.Config, posts []Post) (io.Reader, error) { + var title string + if len(tag) > 0 { + title = tag + } else { + title = config.Title + } + doc, err := layout("templates/list.html", config, title) + if err != nil { + return nil, err + } + feed := doc.Find(".h-feed") + tpl := feed.Find(".h-entry") + tpl.Remove() + + doc.Find(".title").AddClass("p-author h-card").SetAttr("rel", "author") + if tag == "" { + doc.Find(".filter").Remove() + } else { + doc.Find(".filter").Find("h3").SetText("#" + tag) + } + + for _, post := range posts { + entry := tpl.Clone() + entry.Find(".p-name").SetText(post.Title).SetAttr("href", post.URL) + entry.Find(".dt-published"). + SetAttr("datetime", post.PostMatter.Date.UTC().Format(time.RFC3339)). + SetText(post.PostMatter.Date.Format("2006-01-02")) + feed.AppendSelection(entry) + } + + return renderHTML(doc), nil +} + +func renderHomepage(config config.Config, posts []Post) (io.Reader, error) { + _, index, err := getPost("content/_index.md") + if err != nil { + return nil, err + } + doc, err := layout("templates/homepage.html", config, config.Title) + if err != nil { + return nil, err + } + doc.Find("body").AddClass("h-card") + doc.Find(".title").AddClass("p-name u-url") + + html, err := renderMarkdown(index) + doc.Find("#content").SetHtml(html) + + feed := doc.Find(".h-feed") + tpl := feed.Find(".h-entry") + tpl.Remove() + + for _, post := range posts[0:3] { + entry := tpl.Clone() + entry.Find(".p-name").SetText(post.Title) + entry.Find(".u-url").SetAttr("href", post.URL) + entry. + Find(".dt-published"). + SetAttr("datetime", post.PostMatter.Date.UTC().Format(time.RFC3339)). + SetText(post.PostMatter.Date.Format("2006-01-02")) + + feed.AppendSelection(entry) + } + doc.Find(".u-email"). + SetAttr("href", fmt.Sprintf("mailto:%s", config.Email)). + SetText(config.Email) + + elsewhere := doc.Find(".elsewhere") + linkRelMe := elsewhere.Find(".u-url[rel=me]").ParentsUntil("ul") + linkRelMe.Remove() + + for _, link := range config.Menus["me"] { + el := linkRelMe.Clone() + el.Find("a").SetAttr("href", link.URL).SetText(link.Name) + elsewhere.AppendSelection(el) + } + + return renderHTML(doc), nil +} + +func render404(config config.Config) (io.Reader, error) { + doc, err := layout("templates/404.html", config, "404 Not Found") + if err != nil { + return nil, err + } + return renderHTML(doc), nil +} + +func renderFeed(title string, config config.Config, posts []Post, specific string) (io.Reader, error) { + reader, err := os.Open("templates/feed.xml") + if err != nil { + return nil, err + } + defer reader.Close() + doc, err := xmlquery.Parse(reader) + feed := doc.SelectElement("feed") + feed.SelectElement("title").FirstChild.Data = title + feed.SelectElement("link").SetAttr("href", config.BaseURL.String()) + feed.SelectElement("id").FirstChild.Data = atom.MakeTagURI(config, specific) + datetime, err := posts[0].Date.UTC().MarshalText() + feed.SelectElement("updated").FirstChild.Data = string(datetime) + tpl := feed.SelectElement("entry") + xmlquery.RemoveFromTree(tpl) + + for _, post := range posts { + fullURL, err := url.JoinPath(config.BaseURL.String(), post.URL) + if err != nil { + return nil, err + } + text, err := xml.MarshalIndent(&atom.FeedEntry{ + Title: post.Title, + Link: atom.MakeLink(fullURL), + Id: atom.MakeTagURI(config, post.Basename), + Updated: post.Date.UTC(), + Summary: post.Description, + Author: config.Title, + Content: atom.FeedContent{ + Content: post.Content, + Type: "html", + }, + }, " ", " ") + if err != nil { + return nil, err + } + entry, err := xmlquery.ParseWithOptions(strings.NewReader(string(text)), xmlquery.ParserOptions{ + Decoder: &xmlquery.DecoderOptions{ + Strict: false, + AutoClose: xml.HTMLAutoClose, + Entity: xml.HTMLEntity, + }, + }) + if err != nil { + return nil, err + } + xmlquery.AddChild(feed, entry.SelectElement("entry")) + } + + return strings.NewReader(doc.OutputXML(true)), nil +} + +func renderFeedStyles() (io.Reader, error) { + reader, err := os.Open("templates/feed-styles.xsl") + if err != nil { + return nil, err + } + defer reader.Close() + nsMap := map[string]string{ + "xsl": "http://www.w3.org/1999/XSL/Transform", + "atom": "http://www.w3.org/2005/Atom", + "xhtml": "http://www.w3.org/1999/xhtml", + } + doc, err := xmlquery.Parse(reader) + expr, err := xpath.CompileWithNS("//xhtml:style", nsMap) + if err != nil { + return nil, err + } + style := xmlquery.QuerySelector(doc, expr) + css, err := os.ReadFile("templates/style.css") + if err != nil { + return nil, err + } + xmlquery.AddChild(style, &xmlquery.Node{ + Type: xmlquery.TextNode, + Data: string(css), + }) + return strings.NewReader(doc.OutputXML(true)), nil +} + +func renderHTML(doc *goquery.Document) io.Reader { + r, w := io.Pipe() + + // TODO: return errors to main thread + go func() { + w.Write([]byte("\n")) + err := htmlformat.Nodes(w, []*html.Node{doc.Children().Get(0)}) + if err != nil { + slog.Error("error rendering html", "error", err) + w.CloseWithError(err) + return + } + defer w.Close() + }() + return r +} -- cgit 1.4.1