strip blendfile prefixes from common imgs

organize_textures.ps1

@@ -89,13 +89,51 @@ function Move-FilesToCommon {
     }
 }
 
+# Function to extract suffix after blendfile prefix (e.g., "Demarco_Std_Teeth_ao.jpg" -> "Std_Teeth_ao.jpg")
+# Only strips prefixes that are in the $ValidPrefixes list
+function Get-FileNameWithoutPrefix {
+    param(
+        [string]$FileName,
+        [string[]]$ValidPrefixes
+    )
+    
+    # Validate input
+    if ([string]::IsNullOrWhiteSpace($FileName)) {
+        return $FileName
+    }
+    
+    # If no valid prefixes provided, return original filename
+    if ($null -eq $ValidPrefixes -or $ValidPrefixes.Count -eq 0) {
+        return $FileName
+    }
+    
+    # Use Split instead of regex for robustness (avoids $matches variable issues in loops)
+    # Split by the first underscore only (limit to 2 parts)
+    $parts = $FileName.Split('_', 2)
+    
+    if ($parts.Length -eq 2) {
+        $prefix = $parts[0]
+        $suffix = $parts[1]
+        
+        # Only strip if the prefix is in the valid prefixes list
+        if ($ValidPrefixes -contains $prefix -and -not [string]::IsNullOrWhiteSpace($suffix)) {
+            return $suffix
+        }
+    }
+    
+    # No valid prefix found or suffix is empty, return original filename
+    return $FileName
+}
+
 # Function to process duplicate group
 function Process-DuplicateGroup {
     param(
         [array]$Files,
         [string]$CommonPath,
         [string]$DuplicatesPath,
-        [hashtable]$FilesInCommon
+        [hashtable]$FilesInCommon,
+        [switch]$StripPrefix,
+        [string[]]$ValidPrefixes = @()
     )
     
     $movedCount = 0
@@ -109,10 +147,72 @@ function Process-DuplicateGroup {
         }
     }
     
+    # Validate files array
+    if ($null -eq $Files -or $Files.Count -eq 0) {
+        return @{
+            MovedCount = 0
+            DuplicateCount = 0
+        }
+    }
+    
     # Multiple files with same checksum (duplicates)
-    # Move first file to \common
+    # Determine the filename to use
     $firstFile = $Files[0].File
+    if ($null -eq $firstFile -or [string]::IsNullOrWhiteSpace($firstFile.Name)) {
+        Write-Warning "Invalid file object in duplicate group"
+        return @{
+            MovedCount = 0
+            DuplicateCount = 0
+        }
+    }
+    
     $fileName = $firstFile.Name
+    
+    # If StripPrefix is enabled, always strip prefix from the filename
+    if ($StripPrefix) {
+        Write-Host "  [DEBUG] StripPrefix enabled for group with $($Files.Count) file(s)" -ForegroundColor Magenta
+        # Always try to strip prefix - if file has a prefix, it will be removed
+        $strippedName = Get-FileNameWithoutPrefix -FileName $firstFile.Name -ValidPrefixes $ValidPrefixes
+        
+        Write-Host "  [DEBUG] Original: '$($firstFile.Name)' -> Stripped: '$strippedName'" -ForegroundColor Gray
+        
+        # Use stripped name if it's different from original (prefix was removed)
+        # Otherwise keep original (file had no prefix to strip)
+        if ($strippedName -ne $firstFile.Name) {
+            $fileName = $strippedName
+            Write-Host "  [DEBUG] Using stripped name: '$fileName'" -ForegroundColor Green
+        } else {
+            Write-Host "  [DEBUG] No prefix found, keeping original: '$fileName'" -ForegroundColor Yellow
+        }
+        
+        # If we have multiple files with same checksum, try to find common suffix
+        # This handles cases where files from different blendfiles share the same texture
+        if ($Files.Count -gt 1) {
+            $allSuffixes = @()
+            foreach ($fileObj in $Files) {
+                # $fileObj is a PSCustomObject with .File property, so access .File.Name
+                $suffix = Get-FileNameWithoutPrefix -FileName $fileObj.File.Name -ValidPrefixes $ValidPrefixes
+                $allSuffixes += $suffix
+            }
+            
+            Write-Host "  [DEBUG] All suffixes: $($allSuffixes -join ', ')" -ForegroundColor Gray
+            
+            # If all files strip to the same suffix, use that
+            $uniqueSuffixes = @($allSuffixes | Select-Object -Unique)
+            if ($uniqueSuffixes.Count -eq 1 -and $uniqueSuffixes[0] -ne $firstFile.Name) {
+                $fileName = [string]$uniqueSuffixes[0]
+                Write-Host "  [DEBUG] All files share common suffix, using: '$fileName'" -ForegroundColor Green
+            }
+        }
+        
+        Write-Host "  [DEBUG] Final filename: '$fileName'" -ForegroundColor Cyan
+    }
+    
+    # Ensure fileName is never null or empty
+    if ([string]::IsNullOrWhiteSpace($fileName)) {
+        $fileName = $firstFile.Name
+    }
+    
     $destinationPath = Join-Path -Path $CommonPath -ChildPath $fileName
     
     # Handle name conflicts for the first file
@@ -247,6 +347,14 @@ if ($null -eq $blendfileFolders -or $blendfileFolders.Count -eq 0) {
 Write-Host ""
 Write-Host "=== PASS 2: Inter-Blendfile Processing ===" -ForegroundColor Cyan
 
+# Build list of valid blendfile prefixes from folder names
+$validBlendfilePrefixes = @()
+$blendfileFoldersForPrefixes = Get-ChildItem -Path $textureFolderPath -Directory | Where-Object { $_.Name -ne "common" }
+if ($null -ne $blendfileFoldersForPrefixes) {
+    $validBlendfilePrefixes = $blendfileFoldersForPrefixes | ForEach-Object { $_.Name }
+    Write-Host "Valid blendfile prefixes: $($validBlendfilePrefixes -join ', ')" -ForegroundColor Gray
+}
+
 # Get all remaining files (excluding all \common folders)
 Write-Host "Collecting remaining files..." -ForegroundColor Yellow
 $remainingFiles = Get-ChildItem -Path $textureFolderPath -Recurse -File | Where-Object { $_.FullName -notlike "*\common\*" }
@@ -299,7 +407,8 @@ if ($null -eq $remainingFiles -or $remainingFiles.Count -eq 0) {
         }
         
         # Multiple files with same checksum (duplicates across blendfiles)
-        $result = Process-DuplicateGroup -Files $files -CommonPath $rootCommonPath -DuplicatesPath $rootDuplicatesPath -FilesInCommon $filesInRootCommon
+        # Use StripPrefix to remove blendfile prefixes (e.g., "Demarco_", "Chan_") when all files share the same suffix
+        $result = Process-DuplicateGroup -Files $files -CommonPath $rootCommonPath -DuplicatesPath $rootDuplicatesPath -FilesInCommon $filesInRootCommon -StripPrefix -ValidPrefixes $validBlendfilePrefixes
         $pass2Moved += $result.MovedCount
         $pass2Duplicates += $result.DuplicateCount
     }