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Modification of the Powershell script

Posted on 2014-09-26
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Last Modified: 2014-09-29
This is a continuation of the recent requests for Powershell script changes

The lines which are different in the input data are as follows:

G20*N*20140902*98X123456~
(The 98X123456 is the PO in this case)

G86*100*CA*10.05*123456789456~
G87*DESC 1~
G87*15/9OZ~


The script I am using is similar to this:

$InputFile = "C:\Data\original.txt"
$OutputFile = "C:\Data\New.txt"

 Function ParseText ($OutputFile,$InputFile){
 Begin{
             $line,$poline,$totline,$total,$i = $null,$null,$null,$null,0
             Set-Content $OutputFile $null
             $Data = Get-Content -Path $InputFile | ?{$_ -match "(G20\*)|(G87\*)|(G86\*)|(AEI\*)"}
       }
 Process{
       $Data | % {
       #Check the end of data set
             If ($_ -match "AEI\*"){
                   If($poline -ne $null -and $total -ne $null){
                         $Totline = "Total: `$$Total"
                         Write-host "This is Total `$$total"
                         #Write the data collection to output file
                         "$poline$line`r`n$totline`r`n" | out-file $OutputFile -Encoding UTF8 -Append
                         #reset the variables
                         $line,$poline,$totline,$total,$i = $null,$null,$null,$null,0
                   }
             }
             #Collect the PO Number
             If($_ -match "G20\*" -and $_ -match "(\w{2}\*)(\d{3,10})"){
                   $poline = "PONumber: $($Matches[2])"
             }
             #Collect  G87 details and following G87 Description
             If($_ -match "(G86\*{1,})(\d{1,})\*(\w{1,})\*(\d{1,}(\.\d{1,})?)\*{1,}(\w{1,}|\d{1,})"){
                   $i++
                   $total += [double]$Matches[2] * [double]$Matches[4]
                   $Desc = ($Data[([Array]::IndexOf($Data,$_)+1)] -split "\*{1,}|~")[1]
                   [String[]]$line += "`r`nItem $i`: UPC: $($Matches[6]), Desc: $Desc, Qty: $($Matches[2]) Price  `$$($Matches[4])"
             }
       }
  }
 }

 If(Test-Path $InputFile){
  ParseText $OutputFile $InputFile
 }


The type of output I am looking for should be something similar to this:

PONumber: 999999
   Item 1: UPC: 12345678912345, Desc: DESC 1 , 15/9OZ, Qty: 100 Price: $10.05
   Item 2: UPC: 23456789123452, Desc: DESC 2 , 16/9OZ, Qty: 329 Price: $1.00
   Item 3: UPC: 98765432198765, Desc: DESC 3, 1/9OZ, Qty: 20 Price $2.00
   Total: $Calculated total

  PONumber: 999985
   Item 1: UPC: 12345678912345, Desc: information here, Qty: 250 Price: $10.00
   Item 2: UPC: 23456789123452, Desc: information here, Qty: 200 Price: $1.00
   Item 3: UPC: 98765432198765, Desc: information here, Qty: 100 Price $2.00
   Total: $Calculated total

Currently when I run the script it produces a blank file.

What modification do I need to make in order to allow this to work properly?
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Question by:100questions
2 Comments
 

Author Comment

by:100questions
ID: 40346789
@subsun - Do you have any suggestions for this?  Thanks,
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LVL 39

Accepted Solution

by:
footech earned 500 total points
ID: 40347037
Try changing these two lines as follows:
If($_ -match "G20\*" -and $_ -match "(?:\w{1,2}\*)(?:[0-9]{8}\*)([0-9a-z]{3,10})"){
$poline = "PONumber: $($Matches[1])"

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Here's a suggestion.  Go through all of your data and work out the variations that can occur.  Variations can include:
-placement of a desired portion within a line
-what characters are surrounding the portion
-how the portion itself can vary, like
   -what kind of characters it can include (e.g. numbers only, letters and numbers, etc.)
   -the length of the portion
All these things are needed to come up with a regex pattern that will match your data under various circumstances.  Otherwise you're stuck with modifying the regex pattern again and again each time something slightly different occurs.  What I posted above works for the sample you gave, but there's no guarantee that it'll work for another sample if it differs much.
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