How to Delete All Google Glass Timeline Items

For my QSL Query for Google Glass application, I needed a function that deletes all timeline items at once, rather than deleting them one at a time. The following code is written in Go, and is inserted into main.go if you are using Google’s Go Quick Start Project as your Glassware template.

// deleteAllTimelineItems deletes all timeline items.
func deleteAllTimelineItems(r *http.Request, svc *mirror.Service) string {
timelineItems, err := svc.Timeline.List().Do()
if err != nil {
return fmt.Sprintf("An error occurred: %vn", err)
for _, t := range timelineItems.Items {
err := svc.Timeline.Delete(t.Id).Do()
if err != nil {
return fmt.Sprintf("An error occurred: %vn", err)
return "All timeline items have been deleted."

This function can be called from within other code blocks, or a button can be added to index.html:

<form action="/" method="post">
  <input type="hidden" name="operation" value="deleteAllTimelineItems" />
  <button class="btn" type="submit">Delete All Timeline Items</button>
  <input type="hidden" name="contentType" value="image/png" />

If it is going to be called with this button, the name of the operation must be added to the operations variable in main.go – it’s the last line before the closing curly brace.

// Map of operations to functions.
var operations = map[string]func(*http.Request, *mirror.Service) string{
"insertSubscription": insertSubscription,
"deleteSubscription": deleteSubscription,
"insertItem": insertItem,
"insertItemWithAction": insertItemWithAction,
"insertItemAllUsers": insertItemAllUsers,
"insertContact": insertContact,
"deleteContact": deleteContact,
"deleteTimelineItem": deleteTimelineItem,
"deleteAllTimelineItems": deleteAllTimelineItems,

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