LargeFiles.psm1

$script:ModuleRoot = $PSScriptRoot
$script:ModuleVersion = (Import-PowerShellDataFile -Path "$($script:ModuleRoot)\LargeFiles.psd1").ModuleVersion

# Detect whether at some level dotsourcing was enforced
$script:doDotSource = Get-PSFConfigValue -FullName LargeFiles.Import.DoDotSource -Fallback $false
if ($LargeFiles_dotsourcemodule) { $script:doDotSource = $true }

<#
Note on Resolve-Path:
All paths are sent through Resolve-Path/Resolve-PSFPath in order to convert them to the correct path separator.
This allows ignoring path separators throughout the import sequence, which could otherwise cause trouble depending on OS.
Resolve-Path can only be used for paths that already exist, Resolve-PSFPath can accept that the last leaf my not exist.
This is important when testing for paths.
#>


# Detect whether at some level loading individual module files, rather than the compiled module was enforced
$importIndividualFiles = Get-PSFConfigValue -FullName LargeFiles.Import.IndividualFiles -Fallback $false
if ($LargeFiles_importIndividualFiles) { $importIndividualFiles = $true }
if (Test-Path (Resolve-PSFPath -Path "$($script:ModuleRoot)\..\.git" -SingleItem -NewChild)) { $importIndividualFiles = $true }
if ("<was compiled>" -eq '<was not compiled>') { $importIndividualFiles = $true }
    
function Import-ModuleFile
{
    <#
        .SYNOPSIS
            Loads files into the module on module import.
         
        .DESCRIPTION
            This helper function is used during module initialization.
            It should always be dotsourced itself, in order to proper function.
             
            This provides a central location to react to files being imported, if later desired
         
        .PARAMETER Path
            The path to the file to load
         
        .EXAMPLE
            PS C:\> . Import-ModuleFile -File $function.FullName
     
            Imports the file stored in $function according to import policy
    #>

    [CmdletBinding()]
    Param (
        [string]
        $Path
    )
    
    $resolvedPath = $ExecutionContext.SessionState.Path.GetResolvedPSPathFromPSPath($Path).ProviderPath
    if ($doDotSource) { . $resolvedPath }
    else { $ExecutionContext.InvokeCommand.InvokeScript($false, ([scriptblock]::Create([io.file]::ReadAllText($resolvedPath))), $null, $null) }
}

#region Load individual files
if ($importIndividualFiles)
{
    # Execute Preimport actions
    foreach ($path in (& "$ModuleRoot\internal\scripts\preimport.ps1")) {
        . Import-ModuleFile -Path $path
    }
    
    # Import all internal functions
    foreach ($function in (Get-ChildItem "$ModuleRoot\internal\functions" -Filter "*.ps1" -Recurse -ErrorAction Ignore))
    {
        . Import-ModuleFile -Path $function.FullName
    }
    
    # Import all public functions
    foreach ($function in (Get-ChildItem "$ModuleRoot\functions" -Filter "*.ps1" -Recurse -ErrorAction Ignore))
    {
        . Import-ModuleFile -Path $function.FullName
    }
    
    # Execute Postimport actions
    foreach ($path in (& "$ModuleRoot\internal\scripts\postimport.ps1")) {
        . Import-ModuleFile -Path $path
    }
    
    # End it here, do not load compiled code below
    return
}
#endregion Load individual files

#region Load compiled code
<#
This file loads the strings documents from the respective language folders.
This allows localizing messages and errors.
Load psd1 language files for each language you wish to support.
Partial translations are acceptable - when missing a current language message,
it will fallback to English or another available language.
#>

Import-PSFLocalizedString -Path "$($script:ModuleRoot)\en-us\*.psd1" -Module 'LargeFiles' -Language 'en-US'

function Get-LargeFile {
    <#
    .SYNOPSIS
        Searches files exceeding the specified threshold.
     
    .DESCRIPTION
        Searches files exceeding the specified threshold.
        Scans a folder and everything beneath it.
     
    .PARAMETER Path
        The path(s) under which to search for files.
     
    .PARAMETER SizeLimit
        The maximum size a file may be without being included.
     
    .EXAMPLE
        PS C:\> Get-LargeFile -Path \\server\share -SizeLimit 2GB
 
        Returns all files under "\\server\share" that are larger than 2GB
    #>

    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)]
        [ValidateScript({
            $filePath = $_
            try { Resolve-Path -Path $filePath -ErrorAction Stop }
            catch { throw "Invalid Path: $filePath" }
        })]
        [Alias('FullName')]
        [string[]]
        $Path,

        [Parameter(Mandatory = $true)]
        [ValidateRange(1,9223372036854775807)]
        [Int64]
        $SizeLimit
    )

    process {
        # Begin & End (und Process) optional, falls kein Inhalt vorgesehen
        Write-PSFMessage -Message "Path: $Path"
        $Path | Resolve-Path | Get-ChildItem -Recurse -Force -File | Where-Object -Property Length -gt $SizeLimit
    }
}


function Rename-LargeFile {
    <#
    .SYNOPSIS
        Renames files provided by adding a prefix.
     
    .DESCRIPTION
        Renames files provided by adding a prefix.
     
    .PARAMETER Path
        The Path to the file to rename.
     
    .PARAMETER Prefix
        The Prefix to apply (if it has not already been applied)
 
    .PARAMETER WhatIf
        Do a trial run without actually changing anything
 
    .PARAMETER Confirm
        Ask for confirmation before renaming files
     
    .EXAMPLE
        PS C:\> Rename-LargeFile -Path $file.FullName -Prefix 'TOO_LARGE_'
 
        Renames the file specified in $file, adding the 'TOO_LARGE_' prefix
    #>

    [CmdletBinding(SupportsShouldProcess = $true)]
    param (
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)]
        [ValidateScript({
            if (Test-Path -LiteralPath $_) { return $true }
            throw "Path not found: $_"
        })]
        [Alias('FullName')]
        [string[]]
        $Path,

        [Parameter(Mandatory = $true)]
        [string]
        $Prefix
    )

    process {
        foreach ($fileObject in Get-Item -LiteralPath $Path) {
            if ($fileObject.PSIsContainer) {
                Write-PSFMessage -Level Warning -Message "Not a file: $($fileObject.FullName)"
                continue
            }
    
            $object = [PSCUstomObject]@{
                FullName = $fileObject.FullName
                Name = $fileObject.Name
                NewName = $fileObject.Name
                Size = $fileObject.Length
                Extension = $fileObject.Extension
                Success = $false
                Renamed = $false
                Error = $null
            }
    
            if ($object.NewName -notlike "$Prefix*") {
                $object.NewName = $Prefix, $object.NewName -join ""
                if ($object.NewName.Length -gt 250) {
                    $object.NewName = $object.NewName.SubString(0,250)
                }
            }
    
            if ($object.Name -eq $object.NewName) {
                $object.Success = $true
                $object
                continue
            }
    
            if (-not $PSCmdlet.ShouldProcess($object.FullName, "Rename to $($object.NewName)")) {
                $object
                continue
            }
    
            Write-PSFMessage -Message "Renaming $($object.FullName) to $($object.NewName)"
            try { Rename-Item -LiteralPath $object.FullName -NewName $object.NewName -ErrorAction Stop }
            catch {
                $object.Error = $_
                $object
                continue
            }
            $object.Renamed = $true
            $object.Success = $true
            $object
        }
    }
}


<#
This is an example configuration file
 
By default, it is enough to have a single one of them,
however if you have enough configuration settings to justify having multiple copies of it,
feel totally free to split them into multiple files.
#>


<#
# Example Configuration
Set-PSFConfig -Module 'LargeFiles' -Name 'Example.Setting' -Value 10 -Initialize -Validation 'integer' -Handler { } -Description "Example configuration setting. Your module can then use the setting using 'Get-PSFConfigValue'"
#>


Set-PSFConfig -Module 'LargeFiles' -Name 'Import.DoDotSource' -Value $false -Initialize -Validation 'bool' -Description "Whether the module files should be dotsourced on import. By default, the files of this module are read as string value and invoked, which is faster but worse on debugging."
Set-PSFConfig -Module 'LargeFiles' -Name 'Import.IndividualFiles' -Value $false -Initialize -Validation 'bool' -Description "Whether the module files should be imported individually. During the module build, all module code is compiled into few files, which are imported instead by default. Loading the compiled versions is faster, using the individual files is easier for debugging and testing out adjustments."

<#
Stored scriptblocks are available in [PsfValidateScript()] attributes.
This makes it easier to centrally provide the same scriptblock multiple times,
without having to maintain it in separate locations.
 
It also prevents lengthy validation scriptblocks from making your parameter block
hard to read.
 
Set-PSFScriptblock -Name 'LargeFiles.ScriptBlockName' -Scriptblock {
     
}
#>


<#
# Example:
Register-PSFTeppScriptblock -Name "LargeFiles.alcohol" -ScriptBlock { 'Beer','Mead','Whiskey','Wine','Vodka','Rum (3y)', 'Rum (5y)', 'Rum (7y)' }
#>


<#
# Example:
Register-PSFTeppArgumentCompleter -Command Get-Alcohol -Parameter Type -Name LargeFiles.alcohol
#>


New-PSFLicense -Product 'LargeFiles' -Manufacturer 'Friedrich Weinmann' -ProductVersion $script:ModuleVersion -ProductType Module -Name MIT -Version "1.0.0.0" -Date (Get-Date "2022-04-13") -Text @"
Copyright (c) 2022 Friedrich Weinmann
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"@

#endregion Load compiled code