func Init(wg *sync.WaitGroup) {
wg.Add(1)
go func() {
defer wg.Done()
js.Global.Call("addEventListener", "message", func(e *js.Object) {
data := e.Get("data").String()
var msg Message
if err := json.Unmarshal([]byte(data), &msg); err != nil {
log.Printf("Error decoding message from iframe: %s", err)
return
}
go func() {
data, err := fetchFile(&msg)
if err != nil {
log.Printf("Error fetching file: %s\n", err)
return
}
if err := sendResponse(&msg, data); err != nil {
log.Printf("Error sending response to iframe: %s\n", err)
return
}
}()
})
}()
}
// BeforeTransition prepares the page to study
func BeforeTransition(event *jquery.Event, ui *js.Object, p url.Values) bool {
u, err := repo.CurrentUser()
if err != nil {
log.Printf("No user logged in: %s\n", err)
return false
}
log.Debugf("card = %s\n", p.Get("card"))
go func() {
container := jQuery(":mobile-pagecontainer")
// Ensure the indexes are created before trying to use them
u.DB()
card, err := repo.GetRandomCard()
if err != nil {
log.Printf("Error fetching card: %+v\n", err)
return
}
log.Debugf("card = %s\n", card)
body, iframeID, err := card.Body()
if err != nil {
log.Printf("Error parsing body: %+v\n", err)
return
}
log.Debugf("body = %s\niframe = %s\n", body, iframeID)
iframe := js.Global.Get("document").Call("createElement", "iframe")
iframe.Call("setAttribute", "sandbox", "allow-scripts")
iframe.Call("setAttribute", "seamless", nil)
iframe.Set("id", iframeID)
iframe.Set("src", "data:text/html;charset=utf-8;base64,"+base64.StdEncoding.EncodeToString([]byte(body)))
js.Global.Get("document").Call("getElementById", "cardframe").Call("appendChild", iframe)
jQuery(".show-until-load", container).Hide()
jQuery(".hide-until-load", container).Show()
}()
return true
}
func (c *Card) inlineSrc(n *html.Node) error {
doc := goquery.NewDocumentFromNode(n)
doc.Find("img").Each(func(i int, s *goquery.Selection) {
src, ok := s.Attr("src")
if !ok {
log.Print("Found an image with no source!!??")
return
}
log.Debugf("Found image with src of '%s'", src)
att, err := c.GetAttachment(src)
if err != nil {
log.Printf("Error inlining file '%s': %s", src, err)
return
}
s.SetAttr("src", fmt.Sprintf("data:%s;base64,%s", att.ContentType, base64.StdEncoding.EncodeToString(att.Content)))
// iframe.Set("src", "data:text/html;charset=utf-8;base64,"+base64.StdEncoding.EncodeToString([]byte(body)))
})
return nil
}