Fixes password input being prompted every time.

Fixes #7106

- Echoing the current server time via a JS variable and storing the current time on page load in JS.
- Calculating the diff and taking it into account when deciding whether to show the password confirmation.

Signed-off-by: Abijeet <abijeetpatro@gmail.com>

core/js/js.js

@@ -1675,13 +1675,16 @@ function initCore() {
 
 OC.PasswordConfirmation = {
 	callback: null,
-
+	pageLoadTime: null,
 	init: function() {
 		$('.password-confirm-required').on('click', _.bind(this.requirePasswordConfirmation, this));
+		this.pageLoadTime = moment.now();
 	},
 
 	requiresPasswordConfirmation: function() {
-		var timeSinceLogin = moment.now() - (nc_lastLogin * 1000);
+		var serverTimeDiff = this.pageLoadTime - (nc_pageLoad * 1000);
+		var timeSinceLogin = moment.now() - (serverTimeDiff + (nc_lastLogin * 1000));
+		
 		// if timeSinceLogin > 30 minutes and user backend allows password confirmation
 		return (backendAllowsPasswordConfirmation && timeSinceLogin > 30 * 60 * 1000);
 	},

lib/private/Template/JSConfigHelper.php

@@ -155,6 +155,7 @@ class JSConfigHelper {
 			"oc_appswebroots" =>  str_replace('\\/', '/', json_encode($apps_paths)), // Ugly unescape slashes waiting for better solution
 			"datepickerFormatDate" => json_encode($this->l->l('jsdate', null)),
 			'nc_lastLogin' => $lastConfirmTimestamp,
+			'nc_pageLoad' => time(),
 			"dayNames" =>  json_encode([
 				(string)$this->l->t('Sunday'),
 				(string)$this->l->t('Monday'),