171 lines
3.8 KiB
JavaScript
171 lines
3.8 KiB
JavaScript
/**
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* -------------------------------------
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* Connection Check
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* --------------------------------------
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*/
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checkConnection(1);
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/**
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* Performs connection tests every minutes and add connection listeners
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* @param {integer} time in minutes
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*/
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function checkConnection(minutes) {
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var cicle = minutes * 60 * 1000;
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var checkConnection = setInterval(handleConnection, cicle);
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// Connection listeters.
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window.addEventListener("online", handleConnection);
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window.addEventListener("offline", handleConnection);
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}
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/**
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* Handle connection status test.
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*
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* Test conectivity with server and shows modal message.
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*/
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function handleConnection() {
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var connected;
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var msg = "online";
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if (navigator.onLine) {
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isReachable(getServerUrl())
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.then(function(online) {
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if (online) {
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// handle online status
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connected = true;
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showConnectionMessage(connected, msg);
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} else {
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connected = false;
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msg = "No connectivity with server";
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showConnectionMessage(connected, msg);
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}
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})
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.catch(function(err) {
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connected = false;
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msg = err;
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showConnectionMessage(connected, msg);
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});
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} else {
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// handle offline status
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connected = false;
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msg = "Connection offline";
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showConnectionMessage(connected, msg);
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}
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}
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/**
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* Test server reachibilty and get response.
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*
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* @param {String} url
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*
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* Return {promise}
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*/
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function isReachable(url) {
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/**
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* Note: fetch() still "succeeds" for 404s on subdirectories,
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* which is ok when only testing for domain reachability.
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*
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* Example:
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* https://google.com/noexist does not throw
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* https://noexist.com/noexist does throw
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*/
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return fetch(url, { method: "HEAD", mode: "no-cors" })
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.then(function(resp) {
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return resp && (resp.ok || resp.type === "opaque");
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})
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.catch(function(error) {
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console.warn("[conn test failure]:", error);
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});
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}
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/**
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* Gets server origin url
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*/
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function getServerUrl() {
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var server_url;
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server_url = window.location.origin;
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return server_url;
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}
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/**
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* Shows or hide connection infoMessage.
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*
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* @param {bool} conn
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* @param {string} msg
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*/
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function showConnectionMessage(conn = true, msg = "") {
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var data = {};
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if (conn) {
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$("div#message_dialog_connection")
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.closest(".ui-dialog-content")
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.dialog("close");
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} else {
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data.title = "Connection with server has been lost";
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data.text = "Connection status: " + msg;
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infoMessage(data, "message_dialog_connection");
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}
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}
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function infoMessage(data, idMsg) {
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var title = data.title;
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var err_messge = data.text;
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if (idMsg == null) {
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idMsg = uniqId();
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}
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if ($("#" + idMsg).length === 0) {
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$("body").append('<div title="' + title + '" id="' + idMsg + '"></div>');
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$("#" + idMsg).empty();
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}
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$("#err_msg").empty();
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$("#err_msg").html("\n\n" + err_messge);
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$("#" + idMsg)
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.dialog({
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height: 250,
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width: 528,
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opacity: 1,
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modal: true,
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position: {
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my: "center",
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at: "center",
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of: window,
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collision: "fit"
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},
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title: data.title,
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buttons: [
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{
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class:
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"ui-widget ui-state-default ui-corner-all ui-button-text-only sub ok submit-next",
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text: "Retry",
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click: function(e) {
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handleConnection();
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}
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},
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{
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class:
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"ui-widget ui-state-default ui-corner-all ui-button-text-only sub ok submit-cancel",
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text: "Close",
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click: function() {
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$(this).dialog("close");
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}
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}
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],
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open: function(event, ui) {
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$(".ui-widget-overlay").addClass("error-modal-opened");
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},
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close: function(event, ui) {
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$(".ui-widget-overlay").removeClass("error-modal-opened");
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}
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})
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.show();
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}
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