feat: OpenXML.get_Parts ( Fixes #17 )

Author: StartAutomating

Types/OpenXML/get_Parts.ps1

@@ -0,0 +1,84 @@
+if ($this.'.Parts') {
+    return $this.'.Parts'
+}
+
+
+filter getPartContent {
+    $part = $_            
+    $partStream = $part.GetStream()
+    if (-not $partStream) { return }
+    switch ($part.ContentType) {
+        # If the content type looks like XML, read it as XML
+        { $part.ContentType -match '[\./\+]xml' } {
+            $streamReader = [IO.StreamReader]::new($partStream)                        
+            $streamReader.ReadToEnd() -as [xml]
+            $streamReader.Close()
+            break
+        }
+        # If the part looks like JSON, read it as JSON
+        { $part.Uri -match '\.json$'} {
+            $streamReader = [IO.StreamReader]::new($partStream)
+            $jsonContent = $streamReader.ReadToEnd()
+            $streamReader.Close()
+            $jsonContent | ConvertFrom-Json
+            break
+        }
+        { $part.ContentType -match 'text/.+?$'} {
+            $streamReader = [IO.StreamReader]::new($partStream)
+            $textContent = $streamReader.ReadToEnd()
+            $streamReader.Close()
+            $textContent
+            break
+        }
+        # Otherwise, read it as a memory stream and return the byte array
+        default {
+            $outputStream = [IO.MemoryStream]::new()
+            $partStream.CopyTo($outputStream)
+            $outputStream.Seek(0, 'Begin')
+            $outputStream.ToArray()
+        }
+    }
+    
+    $partStream.Close()
+    $partStream.Dispose()
+}
+
+$packageParts = @($this.GetParts())
+$packageContent = [Ordered]@{}
+
+# Now we will read each part in the package, and store it in an `[Ordered]` dictionary
+# Since this _might_ take a while (if you used a lot of PowerPoint images) we want to show a progress bar.
+
+# Prepare the progress bar
+$partCount = 0
+$partTotal = $packageParts.Length
+$partProgress = [Ordered]@{Id=Get-Random;Activity='Reading Parts'}
+            
+# Then read each part
+@(foreach ($part in $packageParts) {
+    $partCount++
+    # update the progress bar
+    Write-Progress @partProgress -Status "Reading part $($part.Uri) ($partCount of $partTotal)" -PercentComplete (
+        [math]::Round(($partCount * 100/ $partTotal))
+    )
+    # and store the part in the dictionary
+    $packageContent["$($part.Uri)"] = 
+        [PSCustomObject]@{
+            PSTypeName = 'OpenXML.Part'
+            Uri = $part.Uri
+            ContentType = $part.ContentType
+            # (we'll use our helper function to get the content)
+            Content = $part | getPartContent 
+            FilePath = "$resolvedPath"
+        }
+})
+<## Now that we've read all parts, we can close the package
+$filePackage.Close()
+# and the memory stream, too.
+$memoryStream.Close()#>
+
+# and finally, complete the progress bar.
+Write-Progress @partProgress -Status "Completed reading $partCount parts" -Completed
+$this | Add-Member NoteProperty '.Parts' -Force $packageContent
+
+return $this.'.Parts'