109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
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package templates
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import (
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"errors"
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"html/template"
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"log"
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"net/http"
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"path"
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"path/filepath"
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"strings"
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"github.com/shurcooL/httpfs/html/vfstemplate"
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"github.com/shurcooL/httpfs/path/vfspath"
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)
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// Templates contains a map of filenames to parsed and prepared templates
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type Templates map[string]*template.Template
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// LoadTemplatesFS takes a filesystem and a location, and returns a Templates
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// map
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func LoadTemplatesFS(fs http.FileSystem, dir string) Templates {
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var templates = make(map[string]*template.Template)
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layouts, err := vfspath.Glob(fs, dir+"/layouts/*.tmpl")
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if err != nil {
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log.Fatal(err)
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}
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//log.Printf("Loaded %d layouts", len(layouts))
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includes, err := vfspath.Glob(fs, dir+"/includes/*.tmpl")
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if err != nil {
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log.Fatal(err)
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}
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//log.Printf("Loaded %d includes", len(includes))
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funcs := getFuncMap() // generate function map
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// Generate our templates map from our layouts/ and includes/ directories
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for _, layout := range layouts {
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files := append(includes, layout)
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t := template.New(filepath.Base(layout)).Funcs(funcs)
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t, err := vfstemplate.ParseFiles(fs, t, files...)
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if err != nil {
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log.Fatalf("Error parsing template %s: %s",
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filepath.Base(layout), err)
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}
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templates[filepath.Base(layout)] = t
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}
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return templates
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}
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func (templates Templates) Get(name string) *template.Template {
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t, ok := templates[name]
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if !ok {
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log.Printf("Error loading template %s", name)
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return template.Must(template.New("empty").Parse("ERROR: Template missing"))
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}
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return t
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}
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func getFuncMap() template.FuncMap {
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return template.FuncMap{
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"istrue": func(value bool) bool {
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return value
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},
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"join": func(sep string, a []string) string {
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return strings.Join(a, sep)
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},
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"dict": func(values ...interface{}) (map[string]interface{}, error) {
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if len(values)%2 != 0 {
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return nil, errors.New("invalid dict call")
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}
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dict := make(map[string]interface{}, len(values)/2)
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for i := 0; i < len(values); i += 2 {
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key, ok := values[i].(string)
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if !ok {
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return nil, errors.New("dict keys must be strings")
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}
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dict[key] = values[i+1]
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}
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return dict, nil
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},
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"url": func(rel ...string) string {
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params := []string{"/"}
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params = append(params, rel...)
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return path.Join(params...)
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},
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"static": func(rel ...string) string {
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params := []string{"/static"}
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params = append(params, rel...)
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return path.Join(params...)
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},
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"i18n": func(locale, key string) string {
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switch locale {
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case "de":
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return "Hallo Welt!"
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case "en":
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return "Hello World!"
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default:
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log.Printf("I18n: '%s' has no key '%s'", locale, key)
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return key
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}
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},
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}
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}
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