Public/Get-ShellPhishSetlists.ps1

function Get-ShellPhishSetlists {
    <#
    .SYNOPSIS
        Retrieve setlist records from Phish.net.
    .DESCRIPTION
        Returns setlists filtered by show ID, show date, song name, or song slug.
    .PARAMETER ApiKey
        Your Phish.net API key. Defaults to $env:PHISH_KEY.
    .PARAMETER ShowId
        Numeric show ID.
    .PARAMETER ShowDate
        Show date in YYYY-MM-DD format.
    .PARAMETER Song
        Song name to search setlists for.
    .PARAMETER Slug
        URL slug of the song.
    .EXAMPLE
        PS C:\> Get-ShellPhishSetlists -ShowDate 1997-11-22
    .EXAMPLE
        PS C:\> Get-ShellPhishSetlists -Slug tweezer
    #>

    [CmdletBinding(DefaultParameterSetName = 'Default')]
    param (
        [Parameter(Position=0)]
        [string]$ApiKey = $env:PHISH_KEY,

        [Parameter()]
        [ValidateSet('json','xml','html')]
        [string]$Format = 'json',

        [Parameter(ParameterSetName='ByShowId', Mandatory=$true)]
        [string]$ShowId,

        [Parameter(ParameterSetName='ByShowDate', Mandatory=$true)]
        [ValidatePattern('^\d{4}-\d{2}-\d{2}$')]
        [string]$ShowDate,

        [Parameter(ParameterSetName='BySong', Mandatory=$true)]
        [string]$Song,

        [Parameter(ParameterSetName='BySlug', Mandatory=$true)]
        [string]$Slug,

        [Parameter()][string]$OrderBy,
        [Parameter()][ValidateSet('asc','desc')][string]$Direction,
        [Parameter()][int]$Limit,
        [Parameter()][switch]$NoHeader
    )

    switch ($PSCmdlet.ParameterSetName) {
        'ByShowId'   { $endpoint = "setlists/showid/$ShowId.$Format" }
        'ByShowDate' { $endpoint = "setlists/showdate/$ShowDate.$Format" }
        'BySong'     { $endpoint = "setlists/song/$Song.$Format" }
        'BySlug'     { $endpoint = "setlists/slug/$Slug.$Format" }
        default      { $endpoint = "setlists.$Format" }
    }

    $qp = Get-CommonQueryParams -OrderBy $OrderBy -Direction $Direction -Limit $Limit -NoHeader:$NoHeader
    Invoke-ShellPhishApi -Endpoint $endpoint -QueryParams $qp -ApiKey $ApiKey
}