Contains powershell class example with enum, constructor overloads, logic using enum types, and static method.

powershell_classes_pratical_example_Part3.ps1

Enum ServerType {
 HyperV
 Sharepoint
 Exchange
 Lync
 Web
 ConfigMgr
}

Class Computer {
    [String]$Name
    [String]$Type
    [string]$Description
    [string]$owner
    [string]$Model
    [int]$Reboots
 
    [void]Reboot(){
        $this.Reboots ++
    }
 
    #constructors

    Computer ([string]$Name){
        if ($comp = Get-ADComputer -filter "name -eq '$Name'" -Properties * -ErrorAction SilentlyContinue){
            $this.name =$Name
            $this.Description = $Comp.Description
 
            switch -wildcard ($comp.OperatingSystem){
                ('*Server*') {$this.Type = 'Server';Break}
                ('*workstation*') {$this.Type = 'Workstation'}
                ('*Laptop*') {$this.Type = 'Laptop';Break}
                default { $this.Type = 'N/A'}
            
            }
           $this.owner = $comp.ManagedBy.Split(',')[0].replace('CN=','')
        }else{
            write-verbose "Could Not find $($this.name)"
        }
        
    }
    Computer ([ServerType]$type,[string]$Description,[string]$owner,[String]$Model){

            if ($user = Get-ADUser -Filter "name -eq '$owner'"){
            $ou = ""
            switch($type){
            
                 "HyperV" {$ou = 'ou=HyperVHosts,OU=Servers,OU=HQ,DC=District,DC=Local';break}
                 "Exchange" {$ou = 'ou=ExchangeHosts,OU=Servers,OU=HQ,DC=District,DC=Local';break}
                 "ConfigMgr" {$ou = 'ou=ConfigMgrHosts,OU=Servers,OU=HQ,DC=District,DC=Local';break}
                 default { $ou = 'OU=Servers,OU=HQ,DC=District,DC=Local'}
            
            }

            $ServerName = [computer]::GetNextFreeName($type)

                try{
                   New-ADComputer -Name $ServerName -Description $Description -ManagedBy $user -path $ou -ErrorAction Stop
                    $this.Name = $ServerName
                    $this.Type = $type
                    $this.Description = $Description
                    $this.owner = $owner     
                }catch{
                    $_
                } 
            }else{
                write-warning "the user $($Owner) is not existing. Please verify and try again."
            }
        
        
    }

    #Methods

    [string]  static GetNextFreeName ([ServerType]$type) {

        $PrefixSearch = ""
        switch($type){
            
                 "HyperV" {$PrefixSearch = "HYPE-*";break}
                 "Exchange" {$PrefixSearch = "EXCH-*";break}
                 "ConfigMgr" {$PrefixSearch = "CONF-*";break}
                 default { $PrefixSearch = "SERV-*";break}
            
            }

        $AllNames = Get-ADComputer -Filter {name -like $PrefixSearch} | select name
        $Prefix = $PrefixSearch.Replace("*","")
        [int]$LastUsed = $AllNames | % {$_.name.trim("$Prefix")} | select -Last 1
        $Next = $LastUsed+1
        $nextNumber = $Next.tostring().padleft(3,'0')
        write-verbose "Prefix:$($Prefix) Number:$($nextNumber)"
        $Return = $prefix + $nextNumber
        
        return $Return
    }
}