WIP

backup.ps1

@@ -1,19 +1,36 @@
 param(
     [Parameter(Mandatory=$true)]
-    [string]$SqlInstance
+    [string]$SqlInstance,
+    
+    [Parameter(Mandatory=$false)]
+    [string]$Directory,
+    
+    [Parameter(Mandatory=$false)]
+    [switch]$Force
 )
 
 #
 # backup.ps1
 #
-# TODO: Update cleanup time based on backup type
+# TODO: Parallelize backups for multiple DBs in the instance
+# TODO: Use PowerShell SQL module instead of sqlcmd
 
 $instanceName = $SqlInstance.Split('\')[1]
 
+# Use provided directory parameter or default to instance-based path
+if ($Directory) {
+    $directory = $Directory
+    Write-Host "INFO: Using provided directory: $directory"
+} else {
     $directory = "C:\Rubrik\$instanceName"
+    Write-Host "INFO: Using default directory: $directory"
+}
+
 $fullBackupDay = 'Thursday'
+$fullBackupOverdueDays = 7  # Force full backup if last full backup is older than this many days
 $checkCluster = $false
-$logFile = "C:\Rubrik\backup-$instanceName.log"
+#$logFile = "C:\Rubrik\backup-$instanceName.log"
+$logFile = "H:\Backup\backup-$instanceName.log"
 
 $fullFlag = $directory + "\last_full.flag"
 $diffFlag = $directory + "\last_diff.flag"
@@ -27,6 +44,35 @@ function FlagTakenToday($flagPath) {
     return $false
 }
 
+function GetLastFullBackupDate($flagPath) {
+    if (Test-Path $flagPath) {
+        $flagDate = (Get-Content $flagPath | Out-String).Trim()
+        try {
+            return [DateTime]::ParseExact($flagDate, "yyyy-MM-dd", $null)
+        }
+        catch {
+            Write-Log "WARNING: Could not parse last full backup date from flag file: $flagDate"
+            return $null
+        }
+    }
+    return $null
+}
+
+function IsFullBackupOverdue($flagPath, $overdueDays) {
+    $lastFullDate = GetLastFullBackupDate $flagPath
+    if ($null -eq $lastFullDate) {
+        Write-Log "WARNING: No last full backup date found. Full backup is considered overdue."
+        return $true
+    }
+    
+    $daysSinceLastFull = ($today - $lastFullDate).Days
+    $isOverdue = $daysSinceLastFull -gt $overdueDays
+    
+    Write-Log "INFO: Last full backup was $daysSinceLastFull days ago on $($lastFullDate.ToString('yyyy-MM-dd')). Overdue threshold: $overdueDays days."
+    
+    return $isOverdue
+}
+
 function Write-Log($message) {
     $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
     $logEntry = "$timestamp $message"
@@ -34,19 +80,22 @@ function Write-Log($message) {
     Write-Host $logEntry
 }
 
-# Check if directory exists and is a symbolic link
+# Check if directory exists and is a symbolic link (unless -Force is specified)
 if (-not (Test-Path $directory)) {
     Write-Log "ERROR: Directory '$directory' does not exist. Exiting script."
     exit 1
 }
 
+if (-not $Force) {
     $directoryInfo = Get-Item $directory
     if (-not ($directoryInfo.Attributes -band [System.IO.FileAttributes]::ReparsePoint)) {
         Write-Log "ERROR: Directory '$directory' is not a symbolic link. Exiting script."
         exit 1
     }
-
     Write-Log "INFO: Directory '$directory' exists and is a symbolic link. Target: $($directoryInfo.Target). Proceeding."
+} else {
+    Write-Log "INFO: Force parameter specified. Skipping symbolic link check for directory '$directory'."
+}
 
 if ($checkCluster) {
     # Check if SQL instance is running locally
@@ -69,17 +118,31 @@ if ($checkCluster) {
     Write-Log "INFO: Cluster check is disabled. Proceeding without verification."
 }
 
+# Check if full backup is overdue regardless of the day
+$isFullBackupOverdue = IsFullBackupOverdue $fullFlag $fullBackupOverdueDays
+
 if ((Get-Date).DayOfWeek -eq $fullBackupDay) {
     if (-not (FlagTakenToday $fullFlag)) {
         $backupType = "FULL"
         $cleanupTime = 168
         Set-Content $fullFlag $today.ToString("yyyy-MM-dd")
-        Write-Log "Selected FULL backup. Flag updated."
+        Write-Log "Selected FULL backup (scheduled day). Flag updated."
     } else {
         $backupType = "LOG"
         $cleanupTime = 24
         Write-Log "FULL backup already taken today. Selected LOG backup."
     }
+} elseif ($isFullBackupOverdue) {
+    if (-not (FlagTakenToday $fullFlag)) {
+        $backupType = "FULL"
+        $cleanupTime = 168
+        Set-Content $fullFlag $today.ToString("yyyy-MM-dd")
+        Write-Log "Selected FULL backup (overdue - forcing full backup). Flag updated."
+    } else {
+        $backupType = "LOG"
+        $cleanupTime = 24
+        Write-Log "FULL backup already taken today (was overdue). Selected LOG backup."
+    }
 } else {
     if (-not (FlagTakenToday $diffFlag)) {
         $backupType = "DIFF"