Command-Design-Pattern.ps1

class Command {
    execute() {
        "[$(get-date)] Logging execute of command [$this]" | Out-Host  # Logs the execution of the command
    }
}

class Loony : Command {    
    execute() { 
        ([Command]$this).execute()  # Calls the execute method of the base class (Command)
        "You're a loony." | Out-Host  # Outputs "You're a loony."
    }
}

class NewBrain : Command {
    execute() { 
        ([Command]$this).execute()  # Calls the execute method of the base class (Command)
        "You might even need a new brain." | Out-Host  # Outputs "You might even need a new brain."
    }
}

class Afford : Command {
    execute() {
        ([Command]$this).execute()  # Calls the execute method of the base class (Command)
        "I couldn't afford a whole new brain." | Out-Host  # Outputs "I couldn't afford a whole new brain."
    }
}

class Macro {
    hidden [Command[]]$commands = @()  # Defines an array property to store commands

    add([Command]$command) {
        $this.commands += $command  # Adds a command to the commands array
    }

    run() {
        $this.commands | ForEach-Object { $_.execute() }  # Executes each command in the commands array
    }
}

$macro = [Macro]::new()  # Creates a new instance of the Macro class

$macro.add([Loony]::new())  # Adds a new instance of the Loony class to the macro
$macro.add([NewBrain]::new())  # Adds a new instance of the NewBrain class to the macro
$macro.add([Afford]::new())  # Adds a new instance of the Afford class to the macro
$macro.run()  # Runs the macro, executing all the commands