Public/Show-VmPowerScheduleCalendar.ps1
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function Show-VmPowerScheduleCalendar { <# .SYNOPSIS Print the next few days of a schedule, so a mistake is something you read rather than survive .DESCRIPTION Most schedule mistakes are not syntax errors. They are "I did not think about the Sunday", or "07:30 in which time zone", or a daylight saving change nobody pictured. A schema validator finds none of those. A printed calendar finds all three. It computes occurrences with the same function the decision engine uses. A preview produced by different code from the one that runs is a preview that eventually lies. Both daylight saving cases are visible in the Note column rather than being smoothed away: an action that fell into the spring gap shows as shifted, and one in the doubled autumn hour shows as ambiguous. .PARAMETER Schedule One or more schedules, in either form. .PARAMETER Days How many days ahead to render. Fourteen covers a fortnight, which is where a wrong weekday shows. .PARAMETER FromUtc Start of the window. Defaults to now, and can be set to look at a specific date - a daylight saving weekend, for instance. .EXAMPLE # What will this actually do? New-VmPowerSchedule -Name office-hours-ch -TimeZone 'Europe/Zurich' -Weekdays '07:30-18:30' | Show-VmPowerScheduleCalendar .EXAMPLE # Look straight at the daylight saving weekend rather than waiting for it $s | Show-VmPowerScheduleCalendar -FromUtc ([datetime]'2026-03-28T00:00:00Z') -Days 3 .EXAMPLE # Everything in the catalogue, one table Get-VmPowerSchedule -ResourceGroupName rg-vmpower -AutomationAccountName aa-vmpower | Show-VmPowerScheduleCalendar -Days 7 | Format-Table Schedule, DayOfWeek, LocalTime, Action, Note .INPUTS Schedules, as objects or hashtables .OUTPUTS AzureVMPowerManagement.VmPowerOccurrence .NOTES RequiredPermissions: None. This command computes times in memory. Prerequisites: PowerShell 7.2 or later. Writes: Nothing. #> [CmdletBinding()] [OutputType('AzureVMPowerManagement.VmPowerOccurrence')] param( [Parameter(Mandatory, ValueFromPipeline)] [object[]]$Schedule, [Parameter()] [ValidateRange(1, 400)] [int]$Days = 14, [Parameter()] [datetime]$FromUtc = [datetime]::UtcNow ) begin { $occurrences = [System.Collections.Generic.List[object]]::new() } process { foreach ($entry in @($Schedule)) { if ($null -eq $entry) { continue } $expanded = Expand-VmPowerSchedule -Schedule $entry foreach ($occurrence in (Get-VmPowerScheduleOccurrence -Schedule $expanded -FromUtc $FromUtc -Days $Days)) { $occurrences.Add($occurrence) } } } end { @($occurrences | Sort-Object Utc, Schedule) } } |