package main import ( "fmt" "html/template" "path/filepath" "regexp" "net/http" "errors" "time" "strings" "github.com/dballard/transmet/categories" ) var ( templates = map[string]*template.Template{} ) // template helper function func dict (values ...interface{}) (map[string]interface{}, error) { if len(values)%2 != 0 { return nil, errors.New("invalid dict call") } dict := make(map[string]interface{}, len(values)/2) for i := 0; i < len(values); i+=2 { key, ok := values[i].(string) if !ok { return nil, errors.New("dict keys must be strings") } dict[key] = values[i+1] } return dict, nil } // string multiplication // stringTimes(3, "Foo") => "FooFooFoo" func stringTimes(times int, str string) string { result := "" for i := 0; i < times; i ++ { result += str } return result } // Turns a Time into a formated string func dateFormat(t time.Time) string { return t.Format(time.ANSIC) } // takes a category_id and returns "Root / Parent / Category" func fullCategoryPath(categoriesFlat map[int]*categories.Category, category_id int) string { fmt.Println("fullCategoryPath: ", category_id) var categoryNames []string = nil var category *categories.Category = categoriesFlat[category_id] for ; category.Parent.Valid; category = categoriesFlat[int(category.Parent.Int64)] { fmt.Println("fullCategoryPath LOOP: ", category.Name) categoryNames = append(categoryNames, category.Name) } return strings.Join(categoryNames, " / ") } // Tempalte helper functions var funcMap = template.FuncMap { "add": func (x, y int) int { return x + y }, "minus": func (x, y int) int { return x - y }, "dict": dict, "stringTimes": stringTimes, "dateFormat": dateFormat, "fullCategoryPath": fullCategoryPath, } func initTemplates() { files, _ := filepath.Glob("templates/pages/*.html") re := regexp.MustCompile("templates/pages/(.*).html") fmt.Println("Loading Templates:") for _, t := range files { name := re.FindStringSubmatch(t) fmt.Println(" ", name[1]) templates[name[1]] = template.Must(template.New(name[1]).Funcs(funcMap).ParseFiles("templates/layout.html", t)) } } func ShowTemplate(template string, w http.ResponseWriter, data map[string]interface{}) { err := templates[template].ExecuteTemplate(w, "layout.html", data) if err != nil { fmt.Println("Exec err: ", err) } // TODO: show error 500 page }