added request.check_with_toasts() and use it

This makes it very simple to check if some endpoints are available, and
show a toast if not, with an error message saying exactly what isn't
available. Currently made use for updates with GitHub and installs with
Thunderstore.

3 files changed, 41 insertions, 2 deletions

diff --git a/src/app/js/browser.js b/src/app/js/browser.js
index 10428bc..f306da8 100644
--- a/src/app/js/browser.js
+++ b/src/app/js/browser.js
@@ -107,7 +107,15 @@ var browser = {
 			browser.filters.toggle(false);
 		}
 	},
-	install: (package_obj, clear_queue = false) => {
+	install: async (package_obj, clear_queue = false) => {
+		let can_connect = await request.check_with_toasts(
+			"Thunderstore", "https://thunderstore.io"
+		)
+
+		if (! can_connect) {
+			return;
+		}
+
 		return mods.install_from_url(
 			package_obj.download || package_obj.versions[0].download_url,
 			package_obj.dependencies || package_obj.versions[0].dependencies,
diff --git a/src/app/js/request.js b/src/app/js/request.js
index ad8c25b..81e10b1 100644
--- a/src/app/js/request.js
+++ b/src/app/js/request.js
@@ -1,3 +1,5 @@
+const lang = require("../../lang");
+const toasts = require("./toasts");
 const launcher = require("./launcher");
 const set_buttons = require("./set_buttons");
 const ipcRenderer = require("electron").ipcRenderer;
@@ -18,6 +20,27 @@ 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;
diff --git a/src/app/js/update.js b/src/app/js/update.js
index d03db02..3732f89 100644
--- a/src/app/js/update.js
+++ b/src/app/js/update.js
@@ -125,7 +125,15 @@ let update = {
 
 	// updates Northstar, `force_update` forcefully updates Northstar,
 	// causing it to update, even if its already up-to-date
-	ns: (force_update) => {
+	ns: async (force_update) => {
+		let can_connect = await request.check_with_toasts(
+			"GitHub", "https://github.com"
+		)
+
+		if (! can_connect) {
+			return;
+		}
+
 		update.ns.last_checked = new Date().getTime();
 		ipcRenderer.send("update-northstar", force_update);
 		update.ns.should_install = false;