fix: Fix metadata extraction script (#514)

examples/Metadata Extraction/Metadata-extraction.ps1

@@ -228,6 +228,7 @@ Function Start-Metadata-Extraction {
     }
 
     Write-Log "Output $($Entries | Out-String)"
+    $MetadataTemplatesHashmap = @{}
 
     ForEach ($Item in $Entries) {
         $ItemID = $Item.id
@@ -263,13 +264,43 @@ Function Start-Metadata-Extraction {
 
         #Loop through each metadata entry to add additional folder info & separate according to metadata template
         ForEach ($MetadataValue in $Metadata) {
+            $TemplateKey = $MetadataValue."`$template"
+
+            #Pull MetadataTemplate to get access to all it's fields and put it in a hashmap.
+            #Next, to the first object being added, we include all missing fields from the metadata template to ensure the corresponding columns are added to the CSV file.
+            if (!$MetadataTemplatesHashmap.ContainsKey($TemplateKey)) {
+                Write-Log "Pulling MetadataTemplate for templateKey: $TemplateKey" -output true -color Green
+                Try {
+                    if (!$UserId) {
+                        $MetadataTemplateResp = (box metadata-templates:get $TemplateKey --json 2>&1)
+                    } else {
+                        $MetadataTemplateResp = (box metadata-templates:get $TemplateKey --as-user=$UserId --json 2>&1)
+                    }
+
+                    $MetadataTemplate = $MetadataTemplateResp | ConvertFrom-Json
+                    $MetadataTemplatesHashmap[$TemplateKey] = $MetadataTemplate
+
+                    foreach ($MetadataTemplateField in $MetadataTemplatesHashmap[$TemplateKey].fields){
+                        #To maintain the continuity of fields from the metadata template in the resulting CSV file, we remove and then add them at the end
+                        if ($MetadataValue.PSObject.Properties.Name -contains $($MetadataTemplateField.key)) {
+                            $metadataFieldValue = $MetadataValue.$($MetadataTemplateField.key);
+                            $MetadataValue.PSObject.Properties.Remove($($MetadataTemplateField.key));
+                            $MetadataValue | Add-Member -NotePropertyName "$($MetadataTemplateField.key)" -NotePropertyValue $metadataFieldValue;
+                        } else {
+                            #We add a field with an empty value so that it's included in the CSV file header, ensuring that subsequent items with this field will also be added
+                            $MetadataValue | Add-Member -NotePropertyName "$($MetadataTemplateField.key)" -NotePropertyValue $null;
+                        }
+                    }
+                }  Catch {
+                    Write-Log "Could not get the metadata template for item. See error log for details." -errorMessage $MetadataTemplateResp -output True -color Red
+                }
+            }
+
             #Append Object Info values: Name, Object Id, Type
             $MetadataValue | Add-Member -NotePropertyName "Name" -NotePropertyValue $Item.name;
             $MetadataValue | Add-Member -NotePropertyName "Object Id" -NotePropertyValue $Item.id;
             $MetadataValue | Add-Member -NotePropertyName "Type" -NotePropertyValue $Item.type;
 
-            $Templatekey = $MetadataValue."`$template"
-
             #Export metadata values to separate csv's according to metadata template keys
             $MetadataValue | Export-Csv -Path ./MetadataTemplate_$Templatekey`.csv -Append -Force -NoTypeInformation
             Write-Log "Metadata saved to: MetadataTemplate_$Templatekey.csv" -output true -color Green