A little toy key value store in PowerShell

host.ps1

PS C:\Users\swart\projects\powershell_scripts> .\name_value_store.ps1

PS C:\Users\swart\projects\powershell_scripts> Add-Data -Name "Foo" -Value 2

PS C:\Users\swart\projects\powershell_scripts> Add-Data -Name "Bar" -Value 8

PS C:\Users\swart\projects\powershell_scripts> Read-Data


Name Value
---- -----
Foo  2
Bar  8

PS C:\Users\swart\projects\powershell_scripts> Find-Data -Name "Bar"

8
PS C:\Users\swart\projects\powershell_scripts> (Find-Data -Name "Bar") + (Find-Data -Name "Foo")

10

name_value_store.ps1

$global:dataFileName = "__data_store.csv"

function global:Get-DataPath() {
    return Join-Path -Path (Get-Location) -ChildPath $global:dataFileName
}

function global:Read-Data() {
    $filePath = Get-DataPath
    if (-Not (Test-Path -Path $filePath)) {
        return $null
    }
    return Import-Csv -Path $filePath
}

function global:Get-Data() {
    $objects = Read-Data
    $data = @{ }
    if ($null -eq $objects) {
        return $data
    }
    $objects | ForEach-Object { $data[$_.Name] = $_.Value }
    return $data
}

function global:Set-Data([hashtable] $Data) {
    $filePath = Get-DataPath
    $objects = $Data.GetEnumerator() | ForEach-Object { [PSCustomObject]@{Name = $_.Key; Value = $_.Value } }
    $objects | export-csv -Path $filePath
}

function global:Add-Data([string] $Name, [int] $Value) {
    $data = Get-Data
    $data[$Name] = $Value
    Set-Data -Data $data
}

function global:Find-Data([string]$Name) {
    $data = Get-Data
    [int] $data[$Name]
}