Apps/Get-TechSmithSnagit.ps1

Function Get-TechSmithSnagit {
    <#
        .SYNOPSIS
            Get the current version and download URL for Snagit.

        .NOTES
            Author: Andrew Cooper
            Twitter: @adotcoop
    #>

    [OutputType([System.Management.Automation.PSObject])]
    [CmdletBinding(SupportsShouldProcess = $False)]
    param (
        [Parameter(Mandatory = $False, Position = 0)]
        [ValidateNotNull()]
        [System.Management.Automation.PSObject]
        $res = (Get-FunctionResource -AppName ("$($MyInvocation.MyCommand)".Split("-"))[1])
    )

    # Query the TechSmith update URI to get the list of versions
    $updateFeed = Invoke-RestMethodWrapper -Uri $res.Get.Update.UpdateFeed

    If ($Null -ne $updateFeed) {

        # Grab latest version, sort by descending version number
        $Latest = $updateFeed | `
            Sort-Object -Property @{ Expression = { [System.Version]"$($_.Major).$($_.Minor).$($_.Maintenance)" }; Descending = $true } | `
            Select-Object -First 1

        If ($Null -ne $Latest) {
            Write-Verbose -Message "$($MyInvocation.MyCommand): Latest is $Latest"

            # Build uri so we can query the api to find the file corresponding to this version
            $LatestUpdateFeedUri = $res.Get.Update.Uri -replace $res.Get.Update.ReplaceVersion, $Latest.VersionID
            $latestupdateFeed = (Invoke-RestMethodWrapper -Uri $LatestUpdateFeedUri).PrimaryDownloadInformation

            If ($Null -ne $latestupdateFeed) {

                # Strip the file extension from the filename (eg snagit.exe becomes snagit)
                $FileName = [System.IO.Path]::GetFileNameWithoutExtension($latestupdateFeed.Name)

                ForEach ($InstallerType in $res.Get.Download.Uri.GetEnumerator()) {

                    # Build the download URL
                    $Uri = ($InstallerType.Value -replace $res.Get.Download.ReplaceFileName, $FileName) -replace $res.Get.Download.ReplaceRelativePath, $latestupdateFeed.RelativePath

                    # Extract file type
                    Try {
                        $Type = [RegEx]::Match($InstallerType.Key, $res.Get.Update.MatchType).Captures.Groups[0].Value
                    }
                    Catch {
                        Throw "$($MyInvocation.MyCommand): failed to obtain file type information."
                    }

                    # Construct the output; Return the custom object to the pipeline
                    $PSObject = [PSCustomObject] @{
                        Version      = "$($latestupdateFeed.Major).$($latestupdateFeed.Minor).$($latestupdateFeed.Maintenance)"
                        Date         = ConvertTo-DateTime -DateTime $latestupdateFeed.Release -Pattern $res.Get.Update.DatePattern
                        Type         = $Type
                        Architecture = Get-Architecture $InstallerType.Key
                        URI          = $Uri
                    }
                    Write-Output -InputObject $PSObject
                }
            }
            Else {
                Throw "$($MyInvocation.MyCommand): Failed to determine the latest Windows release."
            }
        }
        Else {
            Throw "$($MyInvocation.MyCommand): Failed to determine the latest Snagit release."
        }
    }
    Else {
        Throw "$($MyInvocation.MyCommand): unable to retrieve content from $($res.Get.Update.Uri)."
    }
}