Your IP : 192.168.165.1
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See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * Poll the server to keep the session alive.\n *\n * @module core/network\n * @package core\n * @copyright 2019 Damyon Wiese\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\ndefine(['jquery', 'core/ajax', 'core/config', 'core/notification', 'core/str'],\n function($, Ajax, Config, Notification, Str) {\n\n var started = false;\n var warningDisplayed = false;\n var keepAliveFrequency = 0;\n var requestTimeout = 0;\n var keepAliveMessage = false;\n var sessionTimeout = false;\n // 1/10 of session timeout, max of 10 minutes.\n var checkFrequency = Math.min((Config.sessiontimeout / 10), 600) * 1000;\n // 1/5 of sessiontimeout.\n var warningLimit = checkFrequency * 2;\n\n /**\n * The session time has expired - we can't extend it now.\n */\n var timeoutSessionExpired = function() {\n sessionTimeout = true;\n };\n\n /**\n * Ping the server to keep the session alive.\n *\n * @return {Promise}\n */\n var touchSession = function() {\n var request = {\n methodname: 'core_session_touch',\n args: { }\n };\n\n if (sessionTimeout) {\n // We timed out before we extended the session.\n return Str.get_strings([\n {key: 'sessionexpired', component: 'error'},\n {key: 'sessionerroruser', component: 'error'}\n ]).then(function(strings) {\n Notification.alert(\n strings[0], // Title.\n strings[1] // Message.\n );\n return true;\n }).fail(Notification.exception);\n } else {\n return Ajax.call([request], true, true, false, requestTimeout)[0].then(function() {\n if (keepAliveFrequency > 0) {\n setTimeout(touchSession, keepAliveFrequency);\n }\n return true;\n }).fail(function() {\n Notification.alert('', keepAliveMessage);\n });\n }\n };\n\n /**\n * Ask the server how much time is remaining in this session and\n * show confirm/cancel notifications if the session is about to run out.\n *\n * @return {Promise}\n */\n var checkSession = function() {\n var request = {\n methodname: 'core_session_time_remaining',\n args: { }\n };\n\n sessionTimeout = false;\n return Ajax.call([request], true, true, true)[0].then(function(args) {\n if (args.userid <= 0) {\n return false;\n }\n if (args.timeremaining < 0) {\n Str.get_strings([\n {key: 'sessionexpired', component: 'error'},\n {key: 'sessionerroruser', component: 'error'}\n ]).then(function(strings) {\n Notification.alert(\n strings[0], // Title.\n strings[1] // Message.\n );\n return true;\n }).fail(Notification.exception);\n\n } else if (args.timeremaining * 1000 < warningLimit && !warningDisplayed) {\n // If we don't extend the session before the timeout - warn.\n setTimeout(timeoutSessionExpired, args.timeremaining * 1000);\n warningDisplayed = true;\n Str.get_strings([\n {key: 'norecentactivity', component: 'moodle'},\n {key: 'sessiontimeoutsoon', component: 'moodle'},\n {key: 'extendsession', component: 'moodle'},\n {key: 'cancel', component: 'moodle'}\n ]).then(function(strings) {\n Notification.confirm(\n strings[0], // Title.\n strings[1], // Message.\n strings[2], // Extend session.\n strings[3], // Cancel.\n function() {\n touchSession();\n warningDisplayed = false;\n // First wait is half the session timeout.\n setTimeout(checkSession, checkFrequency * 5);\n return true;\n },\n function() {\n warningDisplayed = false;\n setTimeout(checkSession, checkFrequency);\n }\n );\n return true;\n }).fail(Notification.exception);\n } else {\n setTimeout(checkSession, checkFrequency);\n }\n return true;\n });\n // We do not catch the fails from the above ajax call because they will fail when\n // we are not logged in - we don't need to take any action then.\n };\n\n /**\n * Start calling a function to check if the session is still alive.\n */\n var start = function() {\n if (keepAliveFrequency > 0) {\n setTimeout(touchSession, keepAliveFrequency);\n } else {\n // First wait is half the session timeout.\n setTimeout(checkSession, checkFrequency * 5);\n }\n };\n\n /**\n * Don't allow more than one of these polling loops in a single page.\n */\n var init = function() {\n // We only allow one concurrent instance of this checker.\n if (started) {\n return;\n }\n started = true;\n\n start();\n };\n\n /**\n * Start polling with more specific values for the frequency, timeout and message.\n *\n * @param {number} freq How ofter to poll the server.\n * @param {number} timeout The time to wait for each request to the server.\n * @param {string} message The message to display if the session is going to time out.\n */\n var keepalive = function(freq, timeout, message) {\n // We only allow one concurrent instance of this checker.\n if (started) {\n return;\n }\n started = true;\n\n keepAliveFrequency = freq * 1000;\n keepAliveMessage = message;\n requestTimeout = timeout * 1000;\n start();\n };\n\n return {\n keepalive: keepalive,\n init: init\n };\n});\n"],"file":"network.min.js"}