StreamXRef

3.4.1

Shared/Clear-XRefData.ps1

#.ExternalHelp StreamXRef-help.xml
function Clear-XRefData {
    [CmdletBinding(DefaultParameterSetName = "Selection")]
    [OutputType([System.Void])]
    Param(
        [Parameter(Mandatory = $true, Position = 0, ParameterSetName = "Selection")]
        [ValidateSet("ApiKey", "User", "Clip", "Video")]
        [string[]]$Name,

        [Parameter(Position = 1, ParameterSetName = "Selection")]
        [ValidateNotNullOrEmpty()]
        [ValidateScript({ $_ -gt 0 })]
        [Alias("Keep")]
        [int]$DaysToKeep,

        [Parameter(ParameterSetName = "All")]
        [switch]$RemoveAll
    )

    Process {
        if ($RemoveAll) {
            $script:TwitchData.ApiKey = $null
            $script:TwitchData.UserInfoCache.Clear()
            $script:TwitchData.ClipInfoCache.Clear()
            $script:TwitchData.VideoInfoCache.Clear()

            Write-Verbose "All lookup data cleared"
        }
        else {
            if ($Name -icontains "ApiKey") {
                $script:TwitchData.ApiKey.Clear()
                Write-Verbose "(ApiKey) Data cleared"
            }

            if ($Name -icontains "User") {
                $script:TwitchData.UserInfoCache.Clear()
                Write-Verbose "(User) Data cleared"
            }

            if ($PSBoundParameters.ContainsKey("DaysToKeep")) {
                # Only remove old entries

                $Cutoff = [datetime]::UtcNow - (New-TimeSpan -Days $DaysToKeep)

                if ($Name -icontains "Clip") {
                    $PreviousCount = $script:TwitchData.ClipInfoCache.Count

                    # Store separately to avoid enumeration errors
                    [string[]]$PurgeList = $script:TwitchData.ClipInfoCache.GetEnumerator() |
                    Where-Object { $_.Value.Created -lt $Cutoff } | Select-Object -ExpandProperty Key

                    [void] ($PurgeList | ForEach-Object { $script:TwitchData.ClipInfoCache.Remove($_) })

                    # Getting the count this way in case removing an entry somehow fails
                    Write-Verbose "(Clip) Data entries removed: $($PreviousCount - $script:TwitchData.ClipInfoCache.Count)"
                }

                if ($Name -icontains "Video") {
                    $PreviousCount = $script:TwitchData.VideoInfoCache.Count

                    # Store separately to avoid enumeration errors
                    [string[]]$PurgeList = $script:TwitchData.VideoInfoCache.GetEnumerator() |
                        Where-Object { $_.Value -lt $Cutoff } | Select-Object -ExpandProperty Key

                    [void] ($PurgeList | ForEach-Object { $script:TwitchData.VideoInfoCache.Remove($_) })

                    # Getting the count this way in case removing an entry somehow fails
                    Write-Verbose "(Video) Data entries removed: $($PreviousCount - $script:TwitchData.VideoInfoCache.Count)"
                }
            }
            else {
                # Clear all entries

                if ($Name -icontains "Clip") {
                    $script:TwitchData.ClipInfoCache.Clear()
                    Write-Verbose "(Clip) Data cleared"
                }

                if ($Name -icontains "Video") {
                    $script:TwitchData.VideoInfoCache.Clear()
                    Write-Verbose "(Video) Data cleared"
                }
            }
        }
    }
}