This is some Swift code which makes the application use events to signal the different compoents of the application. This seems to be the cleanest way since we're doing java subprocesses and so on. This can also be named a publish-subscribe system as well. If you're familiar with Javascript it would be a handy skill.
### Event Overview
| Event name | Details sent as arguments | Description |
| ------------- | ------------- | ------------- |
| router_start | nothing | This event get triggered when the router starts |
| router_exception | exception message | This will be triggered in case something within the functions that start the java (router) subprocess throws an exception |
| java_found | the location | This will be triggered once the DetectJava swift class has found java |
| router_must_upgrade | nothing | This will be triggered if no I2P is found, or if it's failing to get the version from the jar file |
| extract_completed | nothing | This is triggered when the deployment process is done extracting I2P to it's directory |
| router_can_start | nothing | This event will be triggered when I2P is found and a version number has been found, router won't start before this event |
| router_stop | error if any | Triggered when the router subprocess exits |
| router_pid | the pid number as string | Triggered when we know the pid of the router subprocess |
| router_version | the version string | Triggered when we have successfully extracted current I2P version |
| extract_errored | the error message | Triggered if the process didn't exit correctly |
