pingmonitor.swift

import Foundation

private func bash(_ commandName: String, _ arguments: [String]) -> String? {
        guard var whichPathForCommand = executeShell(command: "/bin/bash" , arguments:[ "-l", "-c", "which \(commandName)" ]) else {
            return "\(commandName) not found"
        }
        whichPathForCommand = whichPathForCommand.trimmingCharacters(in: NSCharacterSet.whitespacesAndNewlines)
        return executeShell(command: whichPathForCommand, arguments: arguments)
    }

    private func executeShell(command: String, arguments: [String] = []) -> String? {
        let task = Process()
        task.launchPath = command
        task.arguments = arguments

        let pipe = Pipe()
        task.standardOutput = pipe
        task.launch()

        let data = pipe.fileHandleForReading.readDataToEndOfFile()
        let output: String? = String(data: data, encoding: String.Encoding.utf8)

        return output
}

let _ = bash("open", ["-a", "AnyBar"])
while true {
    let result = bash("ping", ["-c 1", "ya.ru"])

    if (result!.contains("ttl")) {
      let _ = bash("anybar", ["purple"])
    } else {
      let _ = bash("anybar", ["red"])
    }
    sleep(2)
}