Public/Get-WinSCPItemChecksum.ps1

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
Function Get-WinSCPItemChecksum {
    [CmdletBinding(
        HelpUri = 'https://github.com/dotps1/WinSCP/wiki/Get-WinSCPItemChecksum'
    )]
    [OutputType(
        [Array]
    )]

    Param (
        [Parameter(
            Mandatory = $true,
            ValueFromPipeline = $true
        )]
        [ValidateScript({ 
            if ($_.Opened) { 
                return $true 
            } else { 
                throw 'The WinSCP Session is not in an Open state.'
            }
        })]
        [WinSCP.Session]
        $WinSCPSession,

        [Parameter(
            Mandatory = $true
        )]
        [String]
        $Algorithm,

        [Parameter(
            Mandatory = $true,
            ValueFromPipelineByPropertyName = $true
        )]
        [String[]]
        $Path
    )

    Begin {
        $sessionValueFromPipeLine = $PSBoundParameters.ContainsKey('WinSCPSession')
    }

    Process {
        foreach ($item in (Format-WinSCPPathString -Path $($Path))) {
            if (-not (Test-WinSCPPath -WinSCPSession $WinSCPSession -Path $item)) {
                Write-Error -Message "Cannot find path: $item because it does not exist."

                continue
            }

            try {
                return ($WinSCPSession.CalculateFileChecksum($Algorithm, $item))
            } catch {
                Write-Error -Message $_.ToString()
            }
        }
    }
    
    End {
        if (-not ($sessionValueFromPipeLine)) {
            Remove-WinSCPSession -WinSCPSession $WinSCPSession
        }
    }
}