Sync-ScheduledTickets.ps1

Import-Module -Name PSAtera
Import-Module -Name PnP.PowerShell

$CustomFieldLabel = "Scheduled For"
$SharePointSite = "https://contoso.sharepoint.com/sites/Contoso"
$List = "Calendar"

# I don't know enough about the PnP Module to connect to
# SharePoint better with MFA enabled
Write-Host "Connecting to SharePoint Online..." -NoNewline
Connect-PnpOnline -Url $SharePointSite -PnPManagementShell -LaunchBrowser
Write-Host "✔" -ForegroundColor Green

Write-Host "Getting Open and Pending Tickets..." -NoNewline
$Tickets = Get-AteraTicketsFiltered -Open -Pending
Write-Host "✔" -ForegroundColor Green

Write-Host "Getting events already on calendar..." -NoNewline
$PnPQuery = @'
<View>
  <ViewFields>
    <FieldRef Name="Title"/>
  </ViewFields>
  <Query>
    <Where>
      <Geq>
        <FieldRef Name="EventDate"/>
        <Value type="DateTime"><Today /></Value>
      </Geq>
    </Where>
  </Query>
</View>
'@
$ListItems = Get-PnPListItem -List $List -Query $PnPQuery
Write-Host "✔" -ForegroundColor Green

# Loop through all open and pending tickets to look for ones that are scheduled
Write-Host "Processing tickets..."
$Tickets | ForEach-Object {
  $TicketID = $_.TicketID
  $CustomValue = Get-AteraCustomValue -ObjectType "Ticket" -ObjectID $_.TicketID -FieldName $CustomFieldLabel
  if($null -ne $CustomValue.ValueAsDateTime -and (Get-Date $CustomValue.ValueAsDateTime) -ge (Get-Date)) {
    Write-Host "Processing $($_.TicketID) ($($_.TicketTitle))"
    $CalendarTicket = @{
      Title = "[$($_.TicketID)] $($_.TicketTitle)";
      EventDate = Get-Date $CustomValue.ValueAsDateTime;
      EndDate = Get-Date $CustomValue.ValueAsDateTime;
      fAllDayEvent = $true;
      Location = "https://app.atera.com/Admin#/ticket/$($_.TicketID)";
    }

    $Item = $ListItems | Where-Object { $_.FieldValues.Title -match "^\[$($TicketID)\]" }
    Write-Host "Search for ticket $($_.TicketID): $Item"
    if ($null -eq $Item) {
      Write-Host "Adding new calendar entry for $($_.TicketID)..." -NoNewline
      Add-PnpListItem -List $List -Values $CalendarTicket
      Write-Host "✔" -ForegroundColor Green
    } else {
      Write-Host "Updating existing calendar entry for $($_.TicketID)..." -NoNewline
      Set-PnpListItem -List $List -Identity $Item.Id -Values $CalendarTicket
      Write-Host "✔" -ForegroundColor Green
    }
  }
}