PoshBot.Calculator.psm1
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Function Invoke-Calculation{ [CmdletBinding()] [PoshBot.BotCommand( CommandName = 'c' )] param( [string]$ToCalc ) <#Param( [ValidatePattern('^[0-9\+\-\*\/\(\)\.]*$')] #string should only have numbers and the following symbols: + - * / ( ) . [string]$ToCalc )#> # If I do it this way with the $args variable, then I can accept () in the equation. # Otherwise it separates everything to different parameters, which breaks the function. If($args){ $ToCalc = $ToCalc + ($args -join '') } $regex = '[0-9\+\-\*\/\(\)\.\^]' $oppositeRegex = '[^0-9\+\-\*\/\(\)\.\^]' If($ToCalc -match $oppositeRegex){ $illegalCharacters = $ToCalc -replace $regex, '' Write-Output "Illegal characters: '$illegalCharacters' were removed." $ToCalc = $ToCalc -replace $oppositeRegex, '' } # Replacing ^ symbol with the [math]::pow() method # so 8^4 becomes [math]::pow(8,4) While($ToCalc -match '\^'){ $mathstring = '[math]::pow(' $x = ($ToCalc.IndexOf('^') - 1) $y = $x + 2 + $mathstring.Length While($ToCalc[$x] -match '\d' -and $x -gt -1){ $x-- } If($x -eq -1){ $newString = $mathstring + $ToCalc.Replace('^',',') }Elseif(($x -gt -1) -and ($x -lt $ToCalc.length-1)){ $newString = ($ToCalc[0..$x] -join '') + $mathstring + ($ToCalc[($x+1)..$ToCalc.length] -join '').Replace('^',',') }Else{ # Invalid usage of '^' Throw 'Invalid usage of "^"' } While(($newstring[$y] -match '\d') -and ($y -lt $newstring.Length)){ $y++ } If($y -lt $newstring.Length){ $ToCalc = ($newString[0..($y-1)] -join '') + ')' + ($newString[($y)..$newstring.length] -join '') }Else{ $ToCalc = $newString + ')' } } $Scriptblock = [scriptblock]::Create($ToCalc) Write-Output (Invoke-Command $Scriptblock) } Function Get-SquareRoot{ [CmdletBinding()] [PoshBot.BotCommand( CommandName = 'sqrt' )] Param( [int]$num ) Write-Output ([math]::Sqrt($num)) } Export-ModuleMember -Function Invoke-Calculation, Get-SquareRoot |