var MARK_UNREAD = false;
var ADD_UNSNOOZED_LABEL = false;


function getLabelName(i) {
return "Snooze/Snooze " + i + " days";
}

function setup() {
// Create the labels we’ll need for snoozing
GmailApp.createLabel("Snooze");
for (var i = 1; i <= 7; ++i) {
GmailApp.createLabel(getLabelName(i));
}
if (ADD_UNSNOOZED_LABEL) {
GmailApp.createLabel("Unsnoozed");
}
}

function moveSnoozes() {
var oldLabel, newLabel, page;
for (var i = 1; i <= 7; ++i) {
newLabel = oldLabel;
oldLabel = GmailApp.getUserLabelByName(getLabelName(i));
page = null;
// Get threads in "pages" of 100 at a time
while(!page || page.length == 100) {
page = oldLabel.getThreads(0, 100);
if (page.length > 0) {
if (newLabel) {
// Move the threads into "today’s" label
newLabel.addToThreads(page);
} else {
// Unless it’s time to unsnooze it
GmailApp.moveThreadsToInbox(page);
if (MARK_UNREAD) {
GmailApp.markThreadsUnread(page);
}
if (ADD_UNSNOOZED_LABEL) {
GmailApp.getUserLabelByName("Unsnoozed")
.addToThreads(page);
}
}
// Move the threads out of "yesterday’s" label
oldLabel.removeFromThreads(page);
}
}
}
}