allowances/template.go

package main

import (
	"fmt"
	"html/template"
	"path/filepath"
	"sync"
)

var cachedTemplates = map[string]*template.Template{}
var cachedMutex sync.Mutex

func dollarize(value int) string {
	return fmt.Sprintf("$%0.2f", float32(value)/100.0)
}

var funcs = template.FuncMap{
	"dollarize": dollarize,
}

func T(name string) *template.Template {
	cachedMutex.Lock()
	defer cachedMutex.Unlock()
	if t, ok := cachedTemplates[name]; ok {
		return t
	}
	t := template.New("_base.html").Funcs(funcs)
	t = template.Must(t.ParseFiles(
		"templates/_base.html",
		filepath.Join(*template_dir, name),
	))
	cachedTemplates[name] = t
	return t
}