1 files changed, 105 insertions, 5 deletions
diff --git a/src/app/js/request.js b/src/app/js/request.js
index 29b8883..81e10b1 100644
--- a/src/app/js/request.js
+++ b/src/app/js/request.js
@@ -1,18 +1,118 @@
+const lang = require("../../lang");
+const toasts = require("./toasts");
+const launcher = require("./launcher");
+const set_buttons = require("./set_buttons");
 const ipcRenderer = require("electron").ipcRenderer;
 
-// show a toast message if no Internet connection has been detected.
-if (! navigator.onLine) {
-	ipcRenderer.send("no-internet");
-}
-
 // invokes `requests.get()` from `src/modules/requests.js` through the
 // main process, and returns the output
 let request = async (...args) => {
 	return await ipcRenderer.invoke("request", ...args);
 }
 
+// invokes `requests.check()` from `src/modules/requests.js` through the
+// main process, and returns the output
+request.check = async (...args) => {
+	return await ipcRenderer.invoke("request-check", ...args);
+}
+
 request.delete_cache = () => {
 	ipcRenderer.send("delete-request-cache");
 }
 
+// does `request.check(...args)` and shows toast if the check failed,
+// using `name` inside the toast message
+request.check_with_toasts = async (name, ...args) => {
+	// perform check
+	let can_connect = (
+		await request.check(...args)
+	).succeeded.length;
+
+	// show toast, as the check failed
+	if (! can_connect) {
+		toasts.show({
+			timeout: 10000,
+			scheme: "error",
+			title: lang("gui.toast.title.failed_to_connect"),
+			description: lang("gui.toast.desc.failed_to_connect").replaceAll("%s", name)
+		})
+	}
+
+	return can_connect;
+}
+
+// keeps track of whether we've already sent a toast since we last went
+// offline, to prevent multiple toasts
+let sent_error_toast = false;
+
+// shows or hides offline icon, and shows toast depending on `is_online`
+let state_action = async (is_online) => {
+	if (is_online) {
+		// hide offline icon
+		sent_error_toast = false;
+		offline.classList.add("hidden");
+
+		// re-enable buttons that require internet
+		set_buttons(
+			true, false,
+			document.querySelectorAll(".requires-internet")
+		)
+
+		await launcher.check_servers();
+		serverstatus.style.opacity = "1.0";
+	} else {
+		// show toast
+		if (! sent_error_toast) {
+			sent_error_toast = true;
+			ipcRenderer.send("no-internet");
+		}
+
+		// show offline icon
+		offline.classList.remove("hidden");
+
+		// disable buttons that require internet
+		set_buttons(
+			false, false,
+			document.querySelectorAll(".requires-internet")
+		)
+
+		serverstatus.style.opacity = "0.0";
+
+		// close mod browser
+		try {
+			require("./browser").toggle(false);
+		} catch(err) {}
+	}
+}
+
+setTimeout(() => state_action(navigator.onLine), 100);
+window.addEventListener("online", () => state_action(navigator.onLine));
+window.addEventListener("offline", () => state_action(navigator.onLine));
+
+// checks a list of endpoints/domains we need to be functioning for a
+// lot of the WAN functionality
+let check_endpoints = async () => {
+	// if we're not online according to the navigator, it's highly
+	// unlikely the endpoints will succeed
+	if (! navigator.onLine) {
+		return state_action(false);
+	}
+
+	// check endpoints
+	let status = await request.check([
+		"https://github.com",
+		"https://northstar.tf",
+		"https://thunderstore.io"
+	])
+
+	// handle result of check
+	state_action(!! status.succeeded.length);
+}
+
+// check endpoints on startup
+setTimeout(check_endpoints, 100);
+
+// check endpoints every 30 seconds
+setInterval(check_endpoints, 30000);
+
 module.exports = request;