internal/functions/configuration/Read-DbatoolsConfigFile.ps1

function Read-DbatoolsConfigFile
{
<#
    .SYNOPSIS
        Reads a configuration file and parses it.
     
    .DESCRIPTION
        Reads a configuration file and parses it.
     
    .PARAMETER Path
        The path to the file to parse.
     
    .PARAMETER WebLink
        The link to a website to download straight as raw json.
     
    .PARAMETER RawJson
        Raw json data to interpret.
     
    .EXAMPLE
        PS C:\> Read-DbatoolsConfigFile -Path config.json
     
        Reads the config.json file and returns interpreted configuration objects.
#>

    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true, ParameterSetName = 'Path')]
        [string]
        $Path,
        
        [Parameter(Mandatory = $true, ParameterSetName = 'Weblink')]
        [string]
        $Weblink,
        
        [Parameter(Mandatory = $true, ParameterSetName = 'RawJson')]
        [string]
        $RawJson
    )
    
    #region Utility Function
    function New-ConfigItem
    {
        [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseShouldProcessForStateChangingFunctions", "")]
        [CmdletBinding()]
        param (
            $FullName,
            
            $Value,
            
            $Type,
            
            [switch]
            $KeepPersisted,
            
            [switch]
            $Enforced,
            
            [switch]
            $Policy
        )
        
        [pscustomobject]@{
            FullName        = $FullName
            Value            = $Value
            Type            = $Type
            KeepPersisted   = $KeepPersisted
            Enforced        = $Enforced
            Policy            = $Policy
        }
    }
    
    function Get-WebContent
    {
        [CmdletBinding()]
        param (
            [string]
            $WebLink
        )
        
        $webClient = New-Object System.Net.WebClient
        $webClient.Encoding = [System.Text.Encoding]::UTF8
        $webClient.DownloadString($WebLink)
    }
    #endregion Utility Function
    
    if ($Path)
    {
        if (-not (Test-Path $Path)) { return }
        $data = Get-Content -Path $Path -Encoding UTF8 | ConvertFrom-Json -ErrorAction Stop
    }
    if ($Weblink)
    {
        $data = Get-WebContent -WebLink $Weblink | ConvertFrom-Json -ErrorAction Stop
    }
    if ($RawJson)
    {
        $data = $RawJson | ConvertFrom-Json -ErrorAction Stop
    }
    
    foreach ($item in $data)
    {
        #region No Version
        if (-not $item.Version)
        {
            New-ConfigItem -FullName $item.FullName -Value ([Sqlcollaborative.Dbatools.Configuration.ConfigurationHost]::ConvertFromPersistedValue($item.Value, $item.Type))
        }
        #endregion No Version
        
        #region Version One
        if ($item.Version -eq 1)
        {
            if ((-not $item.Style) -or ($item.Style -eq "Simple")) { New-ConfigItem -FullName $item.FullName -Value $item.Data }
            else
            {
                if (($item.Type -eq "Object") -or ($item.Type -eq 12))
                {
                    New-ConfigItem -FullName $item.FullName -Value $item.Value -Type "Object" -KeepPersisted
                }
                else
                {
                    New-ConfigItem -FullName $item.FullName -Value ([Sqlcollaborative.Dbatools.Configuration.ConfigurationHost]::ConvertFromPersistedValue($item.Value, $item.Type))
                }
            }
        }
        #endregion Version One
    }
}

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