add an EPAPI update checker (experimental)

shared.js

@@ -110,6 +110,47 @@
             }
         );
 
+        // check for epapi updates
+        (function () {
+            
+            // fetch the latest build of epapi
+            fetch('https://endpwn.github.io/epapi/epapi.js?_=' + Date.now()).then(x => x.text()).then(x => {
+
+                // check the version
+                if (kparse(x).version > $api.version) {
+
+                    // if the version on the server is newer, pester the user
+                    $api.ui.showDialog({
+
+                        title: 'EndPwn3: EPAPI Update Available',
+                        body: 'An update to EPAPI has been released. It is recommended that you restart your client in order to gain access to new features and maintain compatibility.',
+                        confirmText: 'Restart Now', cancelText: 'Later',
+
+                        // user pressed "Restart Now"
+                        onConfirm: () => {
+
+                            // refresh the page if we're running in a browser, reboot the app if we're running outside of lite mode
+                            if ($api.lite) location.reload();
+                            else reload();
+
+                        },
+
+                        // they pressed "Later", for some reason
+                        onCancel: () => {
+
+                            // bother them again in 6 hrs (* 60 min * 60 sec * 1000 ms)
+                            setTimeout(arguments.callee, 6 * 60 * 60 * 1000);
+
+                        }
+
+                    });
+
+                }
+
+            });
+
+        })();
+
     });
 
 })();