re-arrange and combine powershell custom objects - powershell

Question

I have a system that currently reads data from a CSV file produced by a separate system that is going to be replaced.
The imported CSV file looks like this
PS> Import-Csv .\SalesValues.csv
Sale Values AA BB
----------- -- --
10 6 5
5 3 4
3 1 9
To replace this process I hope to produce an object that looks identical to the CSV above, but I do not want to continue to use a CSV file.
I already have a script that reads data in from our database and extracts the data that I need to use. I'll not detail the fairly long script that preceeds this point but in effect it looks like this:
$SQLData = Custom-SQLFunction "SELECT * FROM SALES_DATA WHERE LIST_ID = $LISTID"
$SQLData will contain ~5000+ DataRow objects that I need to query.
One of those DataRow object looks something like this:
lead_id : 123456789
entry_date : 26/10/2018 16:51:16
modify_date : 01/11/2018 01:00:02
status : WRONG
user : mrexample
vendor_lead_code : TH1S15L0NGC0D3
source_id : A543212
list_id : 333004
list_name : AA Some Text
gmt_offset_now : 0.00
SaleValue : 10
list_name is going to be prefixed with AA or BB.
SaleValue can be any integer 3 and up, however realistically extremely unlikely to be higher than 100 (as this is a monthly donation) and will be one of 3,5,10 in the vast majority of occurrences.
I already have script that takes the content of list_name, creates and populates the data I need to use into two separate psobjects ($AASalesValues and $BBSalesValues) that collates the total numbers of 'SaleValue' across the data set.
Because I cannot reliably anticipate the value of any SaleValue I have to dynamically create the psobjects properties like this
foreach ($record in $SQLData) {
if ($record.list_name -match "BB") {
if ($record.SaleValue -gt 0) {
if ($BBSalesValues | Get-Member -Name $($record.SaleValue) -MemberType Properties) {
$BBSalesValues.$($record.SaleValue) = $BBSalesValues.$($record.SaleValue)+1
} else {
$BBSalesValues | Add-Member -Name $($record.SaleValue) -MemberType NoteProperty -Value 1
}
}
}
}
The two resultant objects look like this:
PS> $AASalesValues
10 5 3 50
-- - - --
17 14 3 1
PS> $BBSalesvalues
3 10 5 4
- -- - -
36 12 11 1
I now have the data that I need, however I need to format it in a way that replicates the format of the CSV so I can pass it directly to another existing powershell script that is configured to expect the data in the format that the CSV is in, but I do not want to write the data to a file.
I'd prefer to pass this directly to the next part of the script.
Ultimately what I want to do is to produce a new object/some output that looks like the output from Import-Csv command at the top of this post.
I'd like a new object, say $OverallSalesValues, to look like this:
PS>$overallSalesValues
Sale Values AA BB
50 1 0
10 17 12
5 14 11
4 0 1
3 3 36
In the above example the values from $AASalesValues is listed under the AA column, the values from $BBSalesValues is listed under the BB column, with the rows matching the headers of the two original objects.
I did try this with hashtables but I was unable to work out how to both create them from dynamic values and format them to how I needed them to look.

Answer 1

Finally got there.
$TotalList = #()
foreach($n in 3..200){
if($AASalesValues.$n -or $BBSalesValues.$n){
$AACount = $AASalesValues.$n
$BBcount = $BBSalesValues.$n
$values = [PSCustomObject]#{
'Sale Value'= $n
AA = $AACount
BB = $BBcount
}
$TotalList += $values
}
}
$TotalList
produces an output of
Sale Value AA BB
---------- -- --
3 3 36
4 2
5 14 11
10 18 12
50 1
Just need to add a bit to include '0' values instead of $null.

Answer 2

I'm going to assume that $record contains a list of the database results for either $AASalesValues or $BBSalesValues, not both, otherwise you'd need some kind of selector to avoid counting records of one group with the other group.
Group the records by their SaleValue property as LotPings suggested:
$BBSalesValues = $record | Group-Object SaleValue -NoElement
That will give you a list of the SaleValue values with their respective count.
PS> $BBSalesValues
Count Name
----- ----
36 3
12 10
11 5
1 4
You can then update your CSV data with these values like this:
$file = 'C:\path\to\data.csv'
# read CSV into a hashtable mapping the sale value to the complete record
# (so that we can lookup the record by sale value)
$csv = #{}
Import-Csv $file | ForEach-Object {
$csv[$_.'Sale Values'] = $_
}
# Add records for missing sale values
$($AASalesValues; $BBSalesValues) | Select-Object -Expand Name -Unique | ForEach-Object {
if (-not $csv.ContainsKey($_)) {
$csv[$_] = New-Object -Type PSObject -Property #{
'Sale Values' = $_
'AA' = 0
'BB' = 0
}
}
}
# update records with values from $AASalesValues
$AASalesValues | ForEach-Object {
[int]$csv[$_.Name].AA += $_.Count
}
# update records with values from $BBSalesValues
$BBSalesValues | ForEach-Object {
[int]$csv[$_.Name].BB += $_.Count
}
# write updated records back to file
$csv.Values | Export-Csv $file -NoType
Even with your updated question the approach would be pretty much the same, you'd just add another level of grouping for collecting the sales numbers:
$sales = #{}
$record | Group-Object {$_.list_name.Split()[0]} | ForEach-Object {
$sales[$_.Name] = $_.Group | Group-Object SaleValue -NoElement
}
and then adjust the merging to something like this:
$file = 'C:\path\to\data.csv'
# read CSV into a hashtable mapping the sale value to the complete record
# (so that we can lookup the record by sale value)
$csv = #{}
Import-Csv $file | ForEach-Object {
$csv[$_.'Sale Values'] = $_
}
# Add records for missing sale values
$sales.Values | Select-Object -Expand Name -Unique | ForEach-Object {
if (-not $csv.ContainsKey($_)) {
$prop = #{'Sale Values' = $_}
$sales.Keys | ForEach-Object {
$prop[$_] = 0
}
$csv[$_] = New-Object -Type PSObject -Property $prop
}
}
# update records with values from $sales
$sales.GetEnumerator() | ForEach-Object {
$name = $_.Key
$_.Value | ForEach-Object {
[int]$csv[$_.Name].$name += $_.Count
}
}
# write updated records back to file
$csv.Values | Export-Csv $file -NoType