macshome

import Foundation

// A playground to see different ways to get environment variables in Swift

// Foundation is the easiest way using the awesome ProcessInfo class.

// Get all of the environment variables for your running process in a Dictionary.
let foundationEnv = ProcessInfo().environment

print("********** ProcessInfo Environment **********")

macshome

// Get crazy and hook MobileGestalt in a Swift Playground!
//
// If you are a LONG time Mac developer you know that the Gestalt system
// used to be a way to get info about your Mac. These days it's a private
// thing that Apple locks away and you shouldn't really touch. Most of the info
// that you need can probaby be found in IOKit, but some values, like
// the provisioningUDID are not avaliable any other way.
//
// That said, it's a fun exersize to see how to do some various things in Swift.
// Things like loading a dylib or calling private C functions.

macshome

// This playground shows you a few different ways to get device info via IOKit.
// If you want to explore IOKit and look for interesting data I would download
// the Additional Developer Tools from Apple and use the IORegistryExplorer app.
// It makes it super easy to poke around in the IOKit planes.

import IOKit
import Foundation

// For convient access we can make a computed getter for the PlatformExpert.
// Traditionally this has been where you go to find all sorts of data about the

macshome

import Foundation

extension TimeInterval {
    var seconds: TimeInterval { self }
    var minutes: TimeInterval { self * 60 }
    var hours: TimeInterval { self * 3_600 }
    var days: TimeInterval { self * 86_400 }
    var weeks: TimeInterval { self * 604_800 }
    var months: TimeInterval { self * 2_628_000 }

macshome

//
//  Activity.swift
//
//  Created by Zachary Waldowski on 8/21/16.
//  Copyright © 2016 Zachary Waldowski. Licensed under MIT.
//

import os.activity

private final class LegacyActivityContext {

macshome

import Cocoa
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

var isScreenLocked: Bool {
    guard let wssProperties = CGSessionCopyCurrentDictionary() as? [String : Any], (wssProperties["CGSSessionScreenIsLocked"] != nil) else {
        return false
    }
    return true

macshome

import Cocoa

// Security Session
//
// You can access bits about the security session to get some basic info. You can only get info about your own session.
// Other than the session id, the values are all Bools.
var sessionID = SecuritySessionId()
var sessionAttrs = SessionAttributeBits()

let result = SessionGetInfo(callerSecuritySession,

macshome

import Foundation
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

// Simple class to search for things with `NSMetadataQuery`.
class Searcher {
    // This is just for timing things
    let startTime = Date()

macshome

import Cocoa
import CoreServices

// Different ways of finding out about disk space on macOS.

// This method from CoreServices lets you find the space the OS considers "purgable"
// You can trigger a purge as well with `CSDiskSpaceStartRecovery`
let path = URL(fileURLWithPath: "/")
let possibleBytes = CSDiskSpaceGetRecoveryEstimate(path as NSURL)

macshome

import Foundation

// Playground for exploring memory layout in Swift.

// A simple struct
struct Foo {
    let a: Int?
    let b: Int?
    var isTrue = true
}