mirror of https://github.com/jlelse/GoBlog
275 lines
7.2 KiB
Go
275 lines
7.2 KiB
Go
package main
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"html/template"
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"log"
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"net/http"
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"net/url"
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"os"
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"path"
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"path/filepath"
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"strings"
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"time"
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gogeouri "git.jlel.se/jlelse/go-geouri"
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"github.com/araddon/dateparse"
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servertiming "github.com/mitchellh/go-server-timing"
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)
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const (
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templatesDir = "templates"
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templatesExt = ".gohtml"
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templateBase = "base"
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templatePost = "post"
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templateError = "error"
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templateIndex = "index"
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templateTaxonomy = "taxonomy"
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templateSearch = "search"
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templateSummary = "summary"
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templatePhotosSummary = "photosummary"
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templateEditor = "editor"
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templateLogin = "login"
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templateStaticHome = "statichome"
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templateBlogStats = "blogstats"
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templateBlogStatsTable = "blogstatstable"
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templateComment = "comment"
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templateCaptcha = "captcha"
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templateCommentsAdmin = "commentsadmin"
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templateNotificationsAdmin = "notificationsadmin"
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templateWebmentionAdmin = "webmentionadmin"
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templateBlogroll = "blogroll"
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)
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func (a *goBlog) initRendering() error {
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a.templates = map[string]*template.Template{}
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templateFunctions := template.FuncMap{
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"menu": func(blog *configBlog, id string) *menu {
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return blog.Menus[id]
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},
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"user": func() *configUser {
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return a.cfg.User
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},
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"md": func(content string) template.HTML {
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htmlContent, err := a.renderMarkdown(content, false)
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if err != nil {
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log.Fatal(err)
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return ""
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}
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return template.HTML(htmlContent)
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},
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"html": func(s string) template.HTML {
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return template.HTML(s)
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},
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// Post specific
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"p": func(p *post, parameter string) string {
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return p.firstParameter(parameter)
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},
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"ps": func(p *post, parameter string) []string {
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return p.Parameters[parameter]
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},
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"hasp": func(p *post, parameter string) bool {
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return len(p.Parameters[parameter]) > 0
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},
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"title": func(p *post) string {
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return p.title()
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},
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"content": func(p *post) template.HTML {
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return a.html(p)
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},
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"summary": func(p *post) string {
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return a.summary(p)
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},
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"translations": func(p *post) []*post {
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return a.translations(p)
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},
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"shorturl": func(p *post) string {
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return a.shortPostURL(p)
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},
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// Others
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"dateformat": dateFormat,
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"isodate": func(date string) string {
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return dateFormat(date, "2006-01-02")
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},
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"unixtodate": func(unix int64) string {
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return time.Unix(unix, 0).Local().String()
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},
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"now": func() string {
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return time.Now().Local().String()
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},
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"dateadd": func(date string, years, months, days int) string {
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d, err := dateparse.ParseLocal(date)
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if err != nil {
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return ""
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}
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return d.AddDate(years, months, days).Local().String()
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},
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"datebefore": func(date string, before string) bool {
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d, err := dateparse.ParseLocal(date)
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if err != nil {
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return false
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}
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b, err := dateparse.ParseLocal(before)
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if err != nil {
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return false
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}
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return d.Before(b)
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},
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"asset": a.assetFileName,
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"assetsri": a.assetSRI,
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"string": a.ts.GetTemplateStringVariantFunc(),
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"include": func(templateName string, data ...interface{}) (template.HTML, error) {
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if len(data) == 0 || len(data) > 2 {
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return "", errors.New("wrong argument count")
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}
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if rd, ok := data[0].(*renderData); ok {
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if len(data) == 2 {
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nrd := *rd
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nrd.Data = data[1]
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rd = &nrd
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}
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var buf bytes.Buffer
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err := a.templates[templateName].ExecuteTemplate(&buf, templateName, rd)
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return template.HTML(buf.String()), err
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}
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return "", errors.New("wrong arguments")
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},
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"urlize": urlize,
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"sort": sortedStrings,
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"absolute": func(path string) string {
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return a.getFullAddress(path)
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},
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"blogrelative": func(blog *configBlog, path string) string {
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return blog.getRelativePath(path)
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},
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"jsonFile": func(filename string) *map[string]interface{} {
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parsed := &map[string]interface{}{}
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content, err := os.ReadFile(filename)
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if err != nil {
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return nil
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}
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err = json.Unmarshal(content, parsed)
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if err != nil {
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fmt.Println(err.Error())
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return nil
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}
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return parsed
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},
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"mentions": func(absolute string) []*mention {
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mentions, _ := a.db.getWebmentions(&webmentionsRequestConfig{
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target: absolute,
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status: webmentionStatusApproved,
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asc: true,
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})
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return mentions
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},
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"urlToString": func(u url.URL) string {
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return u.String()
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},
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"geouri": func(u string) *gogeouri.Geo {
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g, _ := gogeouri.Parse(u)
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return g
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},
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"geourip": func(g *gogeouri.Geo, parameter string) (s string) {
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if gp := g.Parameters[parameter]; len(gp) > 0 {
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return gp[0]
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}
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return
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},
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"geotitle": a.db.geoTitle,
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"opensearch": openSearchUrl,
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}
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baseTemplate, err := template.New("base").Funcs(templateFunctions).ParseFiles(path.Join(templatesDir, templateBase+templatesExt))
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if err != nil {
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return err
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}
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err = filepath.Walk(templatesDir, func(p string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if info.Mode().IsRegular() && path.Ext(p) == templatesExt {
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if name := strings.TrimSuffix(path.Base(p), templatesExt); name != templateBase {
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if a.templates[name], err = template.Must(baseTemplate.Clone()).New(name).ParseFiles(p); err != nil {
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return err
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}
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}
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}
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return nil
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})
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if err != nil {
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return err
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}
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return nil
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}
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type renderData struct {
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BlogString string
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Canonical string
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TorAddress string
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Blog *configBlog
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Data interface{}
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LoggedIn bool
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CommentsEnabled bool
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WebmentionReceivingEnabled bool
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TorUsed bool
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}
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func (a *goBlog) render(w http.ResponseWriter, r *http.Request, template string, data *renderData) {
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// Server timing
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t := servertiming.FromContext(r.Context()).NewMetric("r").Start()
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// Check render data
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if data.Blog == nil {
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if len(data.BlogString) == 0 {
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data.BlogString = a.cfg.DefaultBlog
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}
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data.Blog = a.cfg.Blogs[data.BlogString]
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}
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if data.BlogString == "" {
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for s, b := range a.cfg.Blogs {
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if b == data.Blog {
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data.BlogString = s
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break
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}
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}
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}
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if a.cfg.Server.Tor && a.torAddress != "" {
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data.TorAddress = fmt.Sprintf("http://%v%v", a.torAddress, r.RequestURI)
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}
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if data.Data == nil {
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data.Data = map[string]interface{}{}
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}
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// Check login
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if loggedIn, ok := r.Context().Value(loggedInKey).(bool); ok && loggedIn {
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data.LoggedIn = true
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}
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// Check if comments enabled
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data.CommentsEnabled = data.Blog.Comments != nil && data.Blog.Comments.Enabled
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// Check if able to receive webmentions
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data.WebmentionReceivingEnabled = a.cfg.Webmention == nil || !a.cfg.Webmention.DisableReceiving
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// Check if Tor request
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if torUsed, ok := r.Context().Value(torUsedKey).(bool); ok && torUsed {
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data.TorUsed = true
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}
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// Set content type
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w.Header().Set(contentType, contentTypeHTMLUTF8)
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// Minify and write response
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var tw bytes.Buffer
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err := a.templates[template].ExecuteTemplate(&tw, template, data)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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_, err = writeMinified(w, contentTypeHTML, tw.Bytes())
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// Server timing
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t.Stop()
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}
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