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templates.go
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templates.go
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package writefreely
import (
"fmt"
"github.com/dustin/go-humanize"
"github.com/writeas/web-core/l10n"
"github.com/writeas/web-core/log"
"html/template"
"io"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"strings"
)
var (
templates = map[string]*template.Template{}
pages = map[string]*template.Template{}
userPages = map[string]*template.Template{}
funcMap = template.FuncMap{
"largeNumFmt": largeNumFmt,
"pluralize": pluralize,
"isRTL": isRTL,
"isLTR": isLTR,
"localstr": localStr,
"localhtml": localHTML,
"tolower": strings.ToLower,
}
)
const (
templatesDir = "templates"
pagesDir = "pages"
)
func showUserPage(w http.ResponseWriter, name string, obj interface{}) {
if obj == nil {
log.Error("showUserPage: data is nil!")
return
}
if err := userPages[filepath.Join("user", name+".tmpl")].ExecuteTemplate(w, name, obj); err != nil {
log.Error("Error parsing %s: %v", name, err)
}
}
func initTemplate(name string) {
if debugging {
log.Info(" %s%s%s.tmpl", templatesDir, string(filepath.Separator), name)
}
files := []string{
filepath.Join(templatesDir, name+".tmpl"),
filepath.Join(templatesDir, "include", "footer.tmpl"),
filepath.Join(templatesDir, "base.tmpl"),
}
if name == "collection" || name == "collection-tags" {
// These pages list out collection posts, so we also parse templatesDir + "include/posts.tmpl"
files = append(files, filepath.Join(templatesDir, "include", "posts.tmpl"))
}
if name == "collection" || name == "collection-tags" || name == "collection-post" || name == "post" {
files = append(files, filepath.Join(templatesDir, "include", "post-render.tmpl"))
}
templates[name] = template.Must(template.New("").Funcs(funcMap).ParseFiles(files...))
}
func initPage(path, key string) {
if debugging {
log.Info(" %s", key)
}
pages[key] = template.Must(template.New("").Funcs(funcMap).ParseFiles(
path,
filepath.Join(templatesDir, "include", "footer.tmpl"),
filepath.Join(templatesDir, "base.tmpl"),
))
}
func initUserPage(path, key string) {
if debugging {
log.Info(" %s", key)
}
userPages[key] = template.Must(template.New(key).Funcs(funcMap).ParseFiles(
path,
filepath.Join(templatesDir, "user", "include", "header.tmpl"),
filepath.Join(templatesDir, "user", "include", "footer.tmpl"),
))
}
func initTemplates() error {
log.Info("Loading templates...")
tmplFiles, err := ioutil.ReadDir(templatesDir)
if err != nil {
return err
}
for _, f := range tmplFiles {
if !f.IsDir() && !strings.HasPrefix(f.Name(), ".") {
parts := strings.Split(f.Name(), ".")
key := parts[0]
initTemplate(key)
}
}
log.Info("Loading pages...")
// Initialize all static pages that use the base template
filepath.Walk(pagesDir, func(path string, i os.FileInfo, err error) error {
if !i.IsDir() && !strings.HasPrefix(i.Name(), ".") {
parts := strings.Split(path, string(filepath.Separator))
key := i.Name()
if len(parts) > 2 {
key = fmt.Sprintf("%s%s%s", parts[1], string(filepath.Separator), i.Name())
}
initPage(path, key)
}
return nil
})
log.Info("Loading user pages...")
// Initialize all user pages that use base templates
filepath.Walk(filepath.Join(templatesDir, "user"), func(path string, f os.FileInfo, err error) error {
if !f.IsDir() && !strings.HasPrefix(f.Name(), ".") {
parts := strings.Split(path, string(filepath.Separator))
key := f.Name()
if len(parts) > 2 {
key = filepath.Join(parts[1], f.Name())
}
initUserPage(path, key)
}
return nil
})
return nil
}
// renderPage retrieves the given template and renders it to the given io.Writer.
// If something goes wrong, the error is logged and returned.
func renderPage(w io.Writer, tmpl string, data interface{}) error {
err := pages[tmpl].ExecuteTemplate(w, "base", data)
if err != nil {
log.Error("%v", err)
}
return err
}
func largeNumFmt(n int64) string {
return humanize.Comma(n)
}
func pluralize(singular, plural string, n int64) string {
if n == 1 {
return singular
}
return plural
}
func isRTL(d string) bool {
return d == "rtl"
}
func isLTR(d string) bool {
return d == "ltr" || d == "auto"
}
func localStr(term, lang string) string {
s := l10n.Strings(lang)[term]
if s == "" {
s = l10n.Strings("")[term]
}
return s
}
func localHTML(term, lang string) template.HTML {
s := l10n.Strings(lang)[term]
if s == "" {
s = l10n.Strings("")[term]
}
s = strings.Replace(s, "write.as", "<a href=\"https://writefreely.org\">write freely</a>", 1)
return template.HTML(s)
}

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