package mime

import (
	"encoding/base64"
	"fmt"
	"html/template"
	"net/http"
	"strings"
)

// these are mostly helper functions for the templating engine, perhaps.

// wrapper but at least I'll be able to change it in the future if something goes south
func Type(data []byte) string {
	return http.DetectContentType(data)
}

// returns true if the mimetype is an image (SVG ALSO COUNTS)
func IsImage(mime string) bool {
	return strings.HasPrefix(mime, "image/")
}

// returns true if the mimetype is a video
func IsVideo(mime string) bool {
	return strings.HasPrefix(mime, "video/")
}

// returns true if the mimetype is text (or code, possibly)
func IsText(mime string) bool {
	return strings.HasPrefix(mime, "text/")
}

// generates one of those `data:text/javascript;base64,gibberish-here`
func DataURI(data []byte, mime string) string {
	encoded := base64.StdEncoding.EncodeToString(data)
	return fmt.Sprintf("data:%s;base64,%s", mime, encoded)
}

// makes it not auto-escape when used before a "src="
func Src(data []byte, mime string) template.URL {
	return template.URL(DataURI(data, mime))
}

func ToStr(data []byte) string {
	return string(data)
}