public/CsvDatabase.ps1
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<# .SYNOPSIS This function retrieves the key for a CSV file used to create the database JSON file name. .DESCRIPTION This function retrieves the key for a CSV file used to create the database JSON file name. The key is generated based on the path of the CSV file, the specified key column, and the last modified time of the file. .PARAMETER Path The path to the CSV file. .PARAMETER KeyColumn The column to use as the key for the database. .EXAMPLE $key = Get-CsvDatabaseKey -Path "C:\path\to\file.csv" -KeyColumn "Column1" This command retrieves the key for the specified CSV file using "Column1" as the key column. .EXAMPLE #> function Get-CsvDatabaseKey { [CmdletBinding()] param ( [Parameter(Mandatory=$true, Position=0, ParameterSetName="ParameterSetName", ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true, HelpMessage="Path to one or more locations.")] [Alias("PSPath")] [ValidateNotNullOrEmpty()] [string[]] $Path, [Parameter(Mandatory)][string]$KeyColumn ) process { $paths = Get-ChildItem -Path $Path foreach ($path in $paths) { if (-not (Test-Path -Path $Path)) { throw "The specified path does not exist: $Path" } $item = Get-Item -Path $Path $lastmodified = $item.LastWriteTime $lastmodified = $lastmodified.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ssZ") $path = $item | Convert-Path $key = "$path - $KeyColumn - $lastmodified" $ret = $key | Get-HashCode return $ret } } } Export-ModuleMember -Function Get-CsvDatabaseKey function Save-CsvDatabase{ [CmdletBinding()] param ( [Parameter(Mandatory, Position = 0)] [string]$Key, [Parameter(Mandatory, Position = 1)] [object]$Data, [Parameter(Mandatory, Position = 2)] [string]$KeyColumn ) $CsvDatabase = New-Object System.Collections.Hashtable foreach ($row in $Data) { $keyValue = $row.$KeyColumn if (-not $CsvDatabase.ContainsKey($keyValue)) { $CsvDatabase[$keyValue] = @{} } foreach ($property in $row.PSObject.Properties) { $CsvDatabase[$keyValue][$property.Name] = $property.Value } } Save-DatabaseKey -Key $key -Value $CsvDatabase } function Get-CsvDatabase{ [CmdletBinding()] param ( [Parameter(Mandatory, Position = 0)] [string]$Key ) $ret = Get-DatabaseKey -Key $key return $ret } |