First commit

Get-PhotosFromGoogle.ps1

@@ -0,0 +1,121 @@
+function Get-GoogleAuthTokens {
+    $scopes = "https://www.googleapis.com/auth/photoslibrary.readonly"
+
+    Start-Process "https://accounts.google.com/o/oauth2/v2/auth?client_id=$clientId&scope=$([string]::Join("%20", $scopes))&access_type=offline&response_type=code&redirect_uri=urn:ietf:wg:oauth:2.0:oob"
+    $code = Read-Host "Enter code here"
+    $response = Invoke-WebRequest $authRequestUri -ContentType application/x-www-form-urlencoded -Method POST -Body "client_id=$clientId&client_secret=$clientSecret&redirect_uri=urn:ietf:wg:oauth:2.0:oob&code=$code&grant_type=authorization_code"
+    $accessToken = ($response.Content | ConvertFrom-Json).access_token 
+    $refreshToken = ($response.Content | ConvertFrom-Json).refresh_token
+    Set-Content $rootFolder"\refreshToken.txt" $refreshToken
+    Set-Content $rootFolder"\accessToken.txt" $accessToken
+}
+
+function Reset-GoogleAccessToken {
+    $refreshTokenParams = @{
+        client_id=$clientId;
+        client_secret=$clientSecret;
+        refresh_token=(Get-Content "$rootFolder\refreshToken.txt");
+        grant_type="refresh_token"; # Fixed value
+      }
+
+      $tokens = Invoke-RestMethod -Uri $authRequestUri -Method POST -Body $refreshTokenParams
+
+      Set-Content "$rootFolder\accessToken.txt" $tokens.access_token
+}
+
+function Get-AllItemsObject {
+    $photosUri = "/mediaItems"
+    $PhotosRequestUri = "$APIUri$PhotosUri"
+    $headers = @{
+        Authorization = "Bearer $accessToken"
+    }
+    $body = @{
+        "pageSize" = "100"
+    }
+    $answer = Invoke-RestMethod -Headers $headers -Uri $PhotosRequestUri -Body $body -Method GET -ContentType 'application/json'
+
+    $itemsList = @()
+    foreach ($item in $answer.mediaItems) {
+        $itemsList += $item
+    }
+
+    while ($answer.nextPageToken) {
+        Reset-GoogleAccessToken
+        $body = @{
+            "pageSize" = "100"
+            "pageToken" = $answer.nextPageToken
+        }
+        $answer = Invoke-RestMethod -Headers $headers -Uri $PhotosRequestUri -Body $body -Method GET -ContentType 'application/json'
+        $itemsList += $answer.mediaItems
+    }
+    $itemsList
+}
+
+$rootFolder = $PSScriptRoot
+$clientId = "4732530628-c4nhevedm7hg5vk8lad3js6vbvip0m1a.apps.googleusercontent.com"
+$clientSecret = "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"
+$authRequestUri = "https://www.googleapis.com/oauth2/v4/token"
+
+$accessToken= Get-Content $rootFolder"\accessToken.txt"
+$APIUri = "https://photoslibrary.googleapis.com/v1"
+
+Get-GoogleAuthTokens
+
+Write-Host "Gathering files list and information from Google Photos..."
+$allItems = Get-AllItemsObject
+
+$destinationFolderRoot = "H:\Photos-Video\From Google\"
+$date = Get-Date -Format dd-MM-yyyy
+$destinationFolder = "$destinationFolderRoot"+"Backup-of-$date"
+
+if (!(Test-Path $destinationFolder)) {
+    New-Item -ItemType Directory -Path $destinationFolder
+}
+
+Write-Host "Backing up to H drive..."
+if ($PSVersionTable.PSVersion -like "7.*") {
+
+    $StartTime = $(get-date)
+
+    $allItems | ForEach-Object -Parallel {
+        $ProgressPreference = "SilentlyContinue"
+        $destinationFolderRoot = "H:\Photos-Video\From Google\"
+        $date = Get-Date -Format dd-MM-yyyy
+        $destinationFolder = "$destinationFolderRoot"+"Backup-of-$date"
+        $outFile = "$destinationFolder"+"\"+$_.filename
+        if ($_.mimeType -like "image*") {
+            $uri = $_.baseUrl+"=d"
+        }
+        elseif ($_.mimeType -like "video*") {
+            $uri = $_.baseUrl+"=dv"
+        }
+        Invoke-WebRequest -Uri $uri -OutFile $outFile
+    }
+    $(get-date)-$StartTime
+}
+
+elseif ($PSVersionTable.PSVersion -like "5.*") {
+    $StartTime = $(get-date)
+
+    Write-Host "This script is a lot faster with Powershell 7. Consider using that instead."
+    foreach ($item in $allItems) {
+        $ProgressPreference = "SilentlyContinue"
+        $outFile = "$destinationFolder"+"\"+$item.filename
+        if ($item.mimeType -like "image*") {
+            $uri = $item.baseUrl+"=d"
+        }
+        elseif ($item.mimeType -like "video*") {
+            $uri = $item.baseUrl+"=dv"
+        }
+        Invoke-WebRequest -Uri $uri -OutFile $outFile
+    }
+    $ProgressPreference = "Continue"
+
+    $(get-date)-$StartTime
+}
+
+Get-ChildItem -Path $rootFolder | Where-Object -Property Name -like "*.txt" | Remove-Item
+
+#### Delete all from Google. Must be done manually, as of 08-28-2023, there is no way to use Google's APIs to delete items from Photos.
+
+### Later: Find way to preserve metadata