Merge pull request #108 from innovara/metered-check

Add feature to control backups on metered connections

backup.ps1

@@ -442,6 +442,10 @@ function Invoke-ConnectivityCheck {
             "[[Internet]] Waiting for connection to repository ($repository_host)... $sleep_count" | Out-File -Append $SuccessLog
             Start-Sleep 30
         }
+        elseif((-not ([String]::IsNullOrEmpty($BackupOnMeteredNetwork)) -or $BackupOnMeteredNetwork)) -and Invoke-MeteredCheck)) {
+            "[[Internet]] Waiting for an unmetered network connection... $sleep_count" | Out-File -Append $SuccessLog        
+            Start-Sleep 30
+        }
         else {
             return $true
         }
@@ -449,6 +453,15 @@ function Invoke-ConnectivityCheck {
     }
 }
 
+# check if on metered network
+function Invoke-MeteredCheck {
+
+    [void][Windows.Networking.Connectivity.NetworkInformation, Windows, ContentType = WindowsRuntime]
+    
+    $cost = [Windows.Networking.Connectivity.NetworkInformation]::GetInternetConnectionProfile().GetConnectionCost()
+    $cost.ApproachingDataLimit -or $cost.OverDataLimit -or $cost.Roaming -or $cost.BackgroundDataUsageRestricted -or ($cost.NetworkCostType -ne "Unrestricted")
+}
+
 # check previous logs
 function Invoke-HistoryCheck {
     Param($SuccessLog, $ErrorLog, $Action)

config.ps1

@@ -3,6 +3,7 @@ $InstallPath = "C:\restic"
 $ExeName = "restic.exe"
 $GlobalParameters = @()
 $LogRetentionDays = 30
+$BackupOnMeteredNetwork = $false
 $InternetTestAttempts = 10
 $GlobalRetryAttempts = 4