Initial commit for powershell scripts.

Download-All-SharePoint-Files.ps1

@@ -0,0 +1,112 @@
+$SiteUrl     = "https://zefiromethane.sharepoint.com/sites/contentTypeHub"
+$Destination = "F:\TeamSite"
+
+# Opens a Microsoft sign-in window.
+Connect-MgGraph -Scopes "Sites.Read.All" -NoWelcome
+
+function Get-GraphCollection {
+    param([string]$Uri)
+
+    do {
+        $response = Invoke-MgGraphRequest -Method GET -Uri $Uri
+
+        foreach ($item in @($response.value)) {
+            Write-Output $item
+        }
+
+        $Uri = $response.'@odata.nextLink'
+    }
+    while ($Uri)
+}
+
+function Copy-GraphFolder {
+    param(
+        [string]$DriveId,
+        [string]$ChildrenUri,
+        [string]$LocalFolder
+    )
+
+    New-Item -ItemType Directory -Path $LocalFolder -Force |
+        Out-Null
+
+    foreach ($item in Get-GraphCollection -Uri $ChildrenUri) {
+        $localPath = Join-Path $LocalFolder $item.name
+        $escapedDriveId = [Uri]::EscapeDataString($DriveId)
+        $escapedItemId  = [Uri]::EscapeDataString([string]$item.id)
+
+        if ($null -ne $item.folder -or $null -ne $item.package) {
+            # Create the folder, including empty folders.
+            New-Item -ItemType Directory -Path $localPath -Force |
+                Out-Null
+
+            $childUri = `
+                "https://graph.microsoft.com/v1.0/drives/" +
+                "$escapedDriveId/items/$escapedItemId/children"
+
+            Copy-GraphFolder `
+                -DriveId $DriveId `
+                -ChildrenUri $childUri `
+                -LocalFolder $localPath
+        }
+        elseif ($null -ne $item.file) {
+            if (Test-Path -LiteralPath $localPath) {
+                Write-Host "Skipping existing file: $localPath"
+                continue
+            }
+
+            Write-Host "Downloading: $localPath"
+
+            $contentUri = `
+                "https://graph.microsoft.com/v1.0/drives/" +
+                "$escapedDriveId/items/$escapedItemId/content"
+
+            Invoke-MgGraphRequest `
+                -Method GET `
+                -Uri $contentUri `
+                -OutputFilePath $localPath
+        }
+        else {
+            Write-Warning "Unsupported item skipped: $($item.name)"
+        }
+    }
+}
+
+# Resolve the SharePoint site from its URL.
+$parsedSiteUrl = [Uri]$SiteUrl
+$sitePath = $parsedSiteUrl.AbsolutePath.TrimEnd("/")
+
+if ([string]::IsNullOrWhiteSpace($sitePath)) {
+    $siteLookupUri = `
+        "https://graph.microsoft.com/v1.0/sites/$($parsedSiteUrl.Host)"
+}
+else {
+    $siteLookupUri = `
+        "https://graph.microsoft.com/v1.0/sites/" +
+        "$($parsedSiteUrl.Host):$sitePath"
+}
+
+$site = Invoke-MgGraphRequest -Method GET -Uri $siteLookupUri
+
+New-Item -ItemType Directory -Path $Destination -Force |
+    Out-Null
+
+# A Graph "drive" represents a SharePoint document library.
+$drivesUri = "https://graph.microsoft.com/v1.0/sites/$($site.id)/drives"
+
+foreach ($drive in Get-GraphCollection -Uri $drivesUri) {
+    $localLibrary = Join-Path $Destination $drive.name
+    $escapedDriveId = [Uri]::EscapeDataString([string]$drive.id)
+
+    Write-Host "Downloading library: $($drive.name)"
+
+    $rootChildrenUri = `
+        "https://graph.microsoft.com/v1.0/drives/" +
+        "$escapedDriveId/root/children"
+
+    Copy-GraphFolder `
+        -DriveId $drive.id `
+        -ChildrenUri $rootChildrenUri `
+        -LocalFolder $localLibrary
+}
+
+Disconnect-MgGraph