Script_copia_de_seguridad.ps1

#
# ============================================================================================================
# | Purpose:           Copies and then compresses program data from TGProfessional served in the local area  |
# |                    network filesystem by the server SERVIDORNOU, pointed by the variable                 | 
# |                    $TGProfessionalData. Stores the compressed folder in the backup folder of the local   |
# |                    filesystem, pointed by the variable $BackupFolder.                                    |
# | Parameters:        Hardcoded in the variable definition, which can be changed editing this script.       |
# | Permissions:       - Does need to write in the local C: drive in order to create the backup folder       |
# |                    which will be created if does not exist.                                              |
# |                    - Does need to access network filesystem to copy TGProfessional data. This filesystem |
# |                    is served by SERVIDORNOU. We use PowerShell instead of Windows cmd because the last   |
# |                    cannot access network filesystems, which is a requirement.                            | 
# |                    - Of course, Windows script policy needs to be configured adequately in order to      | 
# |                    allow the execution of this script.                                                   |
# |                    - Argument 1 of the script indicates that the computer does not need to shut down     |
# |                    when the copy has finished.                                                           |
# | Called From:       Windows Programmed tasks once per day / Manual execution for explicit backups.        |
# | Author:            Aleix Mariné-Tena (aleixaretra@gmail.com)                                             |
# | Notes:             All destinations and paths are hard-coded at the beginning of the script.             |
# |                    This script is expected to be executed from programmed tasks of Windows but can be    |
# |                    executed manually for an inmediate unatended backup copy. A information message is    |
# |                    shown after the backup is performed to let the user know.                             |
# | Revision:          Last change: 14/12/20                                                                 |
# | Copyright:         This script has been developed as a tool for Equipaments Hosteleria Salou, so this    |
# |                    tool cannot be used for comercial benefit of third-parties. All rights reserved.      |  
# ============================================================================================================
#


# Hard-coded parameters and data declaration
$backupFolder = "C:\__COPIES_SEGURETAT"
$TGProfessionalFolder = "TGProfesional"
$TGProfessionalData = "\\Desktop-i6d543d"
$MAX_BACKUPS = 10
$ask = 0
$shutdown = 1

Clear-Host  # Clean screen
echo "Iniciant tasca de copia de seguretat."

# Generate current backup name
$currentBackup = "COPIA_SEGURETAT_$(Get-Date -f HH_mm__dd_MM_yyyy).zip"

if (Test-Path -Path $backupFolder -PathType Container)  # If the backups folder already exists
{
    echo "No es la primera copia de seguretat"
}
else  # If the backup folder does not exist it is the first backup copy...
{
    echo "Primera copia de seguretat. Inicialitzant la carpeta $backupFolder."

    # Create backup folder
    New-Item -ItemType Directory -Force -Path $backupFolder
}

# Clean TGProfesional folder if present before making the copy
if (Test-Path -Path "$backupFolder\$TGProfessionalFolder" -PathType Container)
{
    echo "Borrant carpeta $backupFolder\$TGProfessionalFolder abans de fer la còpia."
    Remove-Item -Path "$backupFolder\$TGProfessionalFolder" -Recurse
}

# Perform backup. Use Copy-Item as starting command instead of directly use Compress-Archive because 
# Compress-Archive cannot access a file that is already open, but Copy-item can.
Copy-Item -LiteralPath "$TGProfessionalData\$TGProfessionalFolder" -Destination $backupFolder -Recurse -Force -Verbose -Exclude @('thumbs.bd','desktop.ini') -ErrorAction Continue 

echo "Ja ha finalitzat la copia de la carpeta TGProfesional del servidor al sistema de fitxers local. Començant compressió."

# Compress the result of the copied backup folder
Compress-Archive -Force -LiteralPath "$backupFolder\$TGProfessionalFolder" -DestinationPath "$backupFolder\$currentBackup" -CompressionLevel Fastest -ErrorAction Continue

echo "La compressió ha finalitzat. La copia de seguretat es troba a $backupFolder\$currentBackup"

# If there are more than $MAX_BACKUPS backups remove the older ones
$currentNumBackups = ( Get-ChildItem -Path $backupFolder -filter "*.zip" -Attributes !Directory | Measure-Object ).Count
if ( $currentNumBackups -gt $MAX_BACKUPS )
{
    echo "S'ha arribat al màxim nombre de còpies de seguretat ($MAX_BACKUPS). Es borraran les còpies més antigues."
    $backupList = Get-ChildItem -Path $backupFolder -filter "*.zip" -Attributes !Directory | sort LastWriteTime -Descending | select name
    while ( $currentNumBackups -gt $MAX_BACKUPS )
    {
        $currentNumBackups = $currentNumBackups - 1
        Remove-Item  "$backupFolder\$backupList[$currentNumBackups]"
        echo "S'ha borrat la copia  $backupFolder\$backupList[$currentNumBackups]."
    }
}

# Remove TGProfesional folder for the copy
echo "Borrant carpeta $backupFolder\$TGProfessionalFolder després de la còpia."
Remove-Item -Path "$backupFolder\$TGProfessionalFolder" -Recurse

# Shutdown and make a local copy in the desktop in Jordi's desktop
if (Test-Path "C:\Users\Jordi\Desktop")
{
    Copy-Item -LiteralPath "$BackupFolder\$currentBackup" -Destination "C:\Users\Jordi\Desktop" -Force -ErrorAction Continue 
}

# Shutdown after operation
if ( $shutdown -eq 1)
{
    # Need user interaction to shutdown
    if ( $ask -eq 1 )
    {
        echo "Prem qualsevol tecla per apagar l'ordinador."
        Read-Host
    }
    Stop-Computer -ComputerName "localhost" -Force
}