StringBuilder.psm1

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

# Detect whether at some level dotsourcing was enforced
$script:doDotSource = Get-PSFConfigValue -FullName StringBuilder.Import.DoDotSource -Fallback $false
if ($StringBuilder_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 StringBuilder.Import.IndividualFiles -Fallback $false
if ($StringBuilder_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 'StringBuilder' -Language 'en-US'

function Assert-StringBuilder
{
<#
    .SYNOPSIS
        Asserts a valid stringbuilder has been created.
     
    .DESCRIPTION
        Asserts a valid stringbuilder has been created.
     
    .PARAMETER Name
        Name of the stringbuilder that must exist.
     
    .PARAMETER Cmdlet
        The $PSCmdlet variable of the calling command.
        Causes the error record to be created in the context of that command
     
    .EXAMPLE
        PS C:\> Assert-StringBuilder -Name 'MyModule' -Cmdlet $Cmdlet
     
        Ensures that the string builder 'MyModule' exists.
#>

    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true)]
        [string]
        $Name,
        
        [Parameter(Mandatory = $true)]
        $Cmdlet
    )
    
    process
    {
        if ($script:builders[$Name]) { return }
        
        $exception = [Exception]::new("String builder '$Name' not found! Ensure a proper string builder has been created!")
        $record = [System.Management.Automation.ErrorRecord]::new($exception, 'MissingStringBuilder', [System.Management.Automation.ErrorCategory]::InvalidOperation, $null)
        $Cmdlet.ThrowTerminatingError($record)
    }
}

function Add-SBLine
{
<#
    .SYNOPSIS
        Add a line of text to a string builder.
     
    .DESCRIPTION
        Add a line of text to a string builder.
     
    .PARAMETER Text
        The text to add.
     
    .PARAMETER Values
        Any values to format into the text specified.
        Uses the -f operator.
     
    .PARAMETER Name
        Name of the string builder to work with.
        Defaults to the caller's module name (if present) or '<none>' (if not so)
     
    .EXAMPLE
        PS C:\> Add-SBLine -Text 'Example line of text'
     
        Adds the specified string into the open string builder.
     
    .EXAMPLE
        PS C:\> Add-SBLine -Text '{0} is larger than {1}' -Values 42,23
     
        Adds the specified string into the open string builder, after formatting in the values offered.
#>

    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true, Position = 0)]
        [string]
        $Text,
        
        [Alias('f')]
        [object[]]
        $Values,
        
        [PsfArgumentCompleter('StringBuilder.Name')]
        [string]
        $Name
    )
    
    begin {
        $sbName = [PSFramework.Utility.UtilityHost]::FriendlyCallstack.Entries[1].InvocationInfo.MyCommand.Module.Name
        if (-not $sbName) { $sbName = '<none>' }
        if ($Name) { $sbName = $Name }
        
        Assert-StringBuilder -Name $sbName -Cmdlet $PSCmdlet
    }
    process
    {
        $newLine = $Text
        if ($Values) { $newLine = $Text -f $Values }
        
        $null = $script:builders[$sbName].AppendLine($newLine)
    }
}

function Add-SBString {
<#
    .SYNOPSIS
        Add a piece of text to a string builder, without adding a linebreak.
     
    .DESCRIPTION
        Add a piece of text to a string builder, without adding a linebreak.
     
    .PARAMETER Text
        The text to add.
     
    .PARAMETER Values
        Any values to format into the text specified.
        Uses the -f operator.
     
    .PARAMETER Name
        Name of the string builder to work with.
        Defaults to the caller's module name (if present) or '<none>' (if not so)
     
    .EXAMPLE
        PS C:\> Add-SBString -Text 'Example line of text'
     
        Adds the specified string into the open string builder.
     
    .EXAMPLE
        PS C:\> Add-SBString -Text '{0} is larger than {1}' -Values 42,23
     
        Adds the specified string into the open string builder, after formatting in the values offered.
#>

    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true, Position = 0)]
        [string]
        $Text,
        
        [object[]]
        $Values,
        
        [PsfArgumentCompleter('StringBuilder.Name')]
        [string]
        $Name
    )
    
    begin {
        $sbName = [PSFramework.Utility.UtilityHost]::FriendlyCallstack.Entries[1].InvocationInfo.MyCommand.Module.Name
        if (-not $sbName) { $sbName = '<none>' }
        if ($Name) { $sbName = $Name }
        
        Assert-StringBuilder -Name $sbName -Cmdlet $PSCmdlet
    }
    process {
        $newText = $Text
        if ($Values) { $newText = $Text -f $Values }
        
        $null = $script:builders[$sbName].Append($newText)
    }
}

function Close-SBStringBuilder {
<#
    .SYNOPSIS
        Closes out an open stringbuilder, returning its string value content.
     
    .DESCRIPTION
        Closes out an open stringbuilder, returning its string value content.
     
    .PARAMETER Name
        Name of the string builder to work with.
        Defaults to the caller's module name (if present) or '<none>' (if not so)
     
    .EXAMPLE
        PS C:\> Close-SBStringBuilder
     
        Close out the current stringbuilder object.
#>

    [OutputType([string])]
    [CmdletBinding()]
    param (
        [PsfArgumentCompleter('StringBuilder.Name')]
        [string]
        $Name
    )
    
    begin {
        $sbName = [PSFramework.Utility.UtilityHost]::FriendlyCallstack.Entries[1].InvocationInfo.MyCommand.Module.Name
        if (-not $sbName) { $sbName = '<none>' }
        if ($Name) { $sbName = $Name }
        
        Assert-StringBuilder -Name $sbName -Cmdlet $PSCmdlet
    }
    process {
        $script:builders[$sbName].ToString()
        $script:builders.Remove($sbName)
    }
}

function Get-SBStringBuilder {
<#
    .SYNOPSIS
        Return a specific stringbuilder object.
     
    .DESCRIPTION
        Return a specific stringbuilder object.
     
    .PARAMETER Name
        Name of the string builder to retrieve.
        Defaults to the caller's module name (if present) or '<none>' (if not so)
     
    .EXAMPLE
        PS C:\> Get-SBStringBuilder
     
        Return the current stringbuilder of the calling module.
#>

    [CmdletBinding()]
    param (
        [PsfArgumentCompleter('StringBuilder.Name')]
        [string]
        $Name
    )
    
    begin {
        $sbName = [PSFramework.Utility.UtilityHost]::FriendlyCallstack.Entries[1].InvocationInfo.MyCommand.Module.Name
        if (-not $sbName) { $sbName = '<none>' }
        if ($Name) { $sbName = $Name }
    }
    process {
        $script:builders[$sbName]
    }
}

function New-SBStringBuilder
{
<#
    .SYNOPSIS
        Create a new stringbuilder object.
     
    .DESCRIPTION
        Create a new stringbuilder object.
     
    .PARAMETER Register
        Register the string builder under the name (if specified) or the current module (if not so).
     
    .PARAMETER Name
        Name under which to register a string builder.
        Defaults to the caller's module name (if present) or '<none>' (if not so)
     
    .EXAMPLE
        PS C:\> New-SBStringBuilder
     
        Create a new string builder under the current module's name.
#>

    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseShouldProcessForStateChangingFunctions", "")]
    [OutputType([System.Text.StringBuilder])]
    [CmdletBinding()]
    Param (
        [switch]
        $Register,
        
        [PsfArgumentCompleter('StringBuilder.Name')]
        [string]
        $Name
    )
    
    begin{
        $sbName = [PSFramework.Utility.UtilityHost]::FriendlyCallstack.Entries[1].InvocationInfo.MyCommand.Module.Name
        if (-not $sbName) { $sbName = '<none>' }
        if ($Name) { $sbName = $Name }
    }
    process
    {
        $stringBuilder = [System.Text.StringBuilder]::new()
        if ($Register -or $Name) { $script:builders[$sbName] = $stringBuilder }
        $stringBuilder
    }
}

function Register-SBStringBuilder {
<#
    .SYNOPSIS
        Registers the specified string builder under a name.
     
    .DESCRIPTION
        Registers the specified string builder under a name.
        Useful to add an externally created string builder object to the system
     
    .PARAMETER StringBuilder
        The stringbuilder object to add.
     
    .PARAMETER Name
        Name of the string builder to work with.
        Defaults to the caller's module name (if present) or '<none>' (if not so)
     
    .EXAMPLE
        PS C:\> Register-SBStringBuilder -StringBuilder $StringBuilder
     
        Adds the specified stringbuilder object under the current module's name.
#>

    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true)]
        [System.Text.StringBuilder]
        $StringBuilder,
        
        [PsfArgumentCompleter('StringBuilder.Name')]
        [string]
        $Name
    )
    
    begin {
        $sbName = [PSFramework.Utility.UtilityHost]::FriendlyCallstack.Entries[1].InvocationInfo.MyCommand.Module.Name
        if (-not $sbName) { $sbName = '<none>' }
        if ($Name) { $sbName = $Name }
    }
    process {
        $script:builders[$sbName] = $stringBuilder
    }
}

<#
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 'StringBuilder' -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 'StringBuilder' -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 'StringBuilder' -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 'StringBuilder.ScriptBlockName' -Scriptblock {
     
}
#>


Register-PSFTeppScriptblock -Name 'StringBuilder.Name' -ScriptBlock {
    & (Get-Module StringBuilder) { $script:builders.Keys }
}


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


New-PSFLicense -Product 'StringBuilder' -Manufacturer 'Friedrich Weinmann' -ProductVersion $script:ModuleVersion -ProductType Module -Name MIT -Version "1.0.0.0" -Date (Get-Date "2021-08-05") -Text @"
Copyright (c) 2021 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.
"@


# Store current string builders
# Storage separated by module
$script:builders = @{ }
#endregion Load compiled code