Extract an array from an object and do calculation - arrays

Question

I have this kind of an object:
How can I extract each quota and do calculation with used?
I tried this
foreach($quota in $LKPQuotas.quotas) {
foreach($zone in $quota) {
$totalUsed += $zone.used
}
}
But it wont work for me. $LKPQuotas equals to $quota and $zone, and I do not understand why.
I can do calculation manually with code below, but I believe, that there is the other way.
foreach($zone in $LKPQuotas.quotas.volume_gigabytes_basic) {
$volume_gigabytes_basic += $zone.used
}
Please, help me with that. Thank you and stay safe, pandemic is really hard.

Answer 1

foreach() doesn't magically enumerate all properties on an object.
You'll need to do something like:
# Create hashtable that will hold aggregates for each volume
$quotaStats = #{}
# loop through each volume
foreach($property in $LKPQuotas.quotas.psobject.Properties){
$VolumeName = $property.Name
# Create new object object to hold the results for this volume
$quotaStats[$VolumeName] = [pscustomobject]#{
VolumeName = $VolumeName
TotalUsed = 0
TotalAllowed = 0
}
# Collect and aggregate stats for each zone
foreach($zone in $property.Value){
$quotaStats[$VolumeName].TotalUser += $zone.used
$quotaStats[$VolumeName].TotalAllowed += $zone.value
}
}
After which $quotaStats will contain exactly one entry per volume, with the totals for every zone

Answer 2

Creating test data:
$val = {Get-Random -Minimum 1000 -Maximum 2000}
$used = {Get-Random -Minimum 100 -Maximum 900}
$LKPQuotas = [PSCustomObject]#{
quotas = [PSCustomObject]#{
volume_gigabytes_basic = #(
[PSCustomObject]#{value=&$val; used=& $used},
[PSCustomObject]#{value=&$val; used=& $used},
[PSCustomObject]#{value=&$val; used=& $used}
)
volume_gigabytes_fast = #(
[PSCustomObject]#{value=& $val; used=& $used},
[PSCustomObject]#{value=& $val; used=& $used},
[PSCustomObject]#{value=& $val; used=& $used}
)
images_gigabytes = #(
[PSCustomObject]#{used=& $used},
[PSCustomObject]#{used=& $used},
[PSCustomObject]#{used=& $used}
)
compute_cores = #(
[PSCustomObject]#{sockets=1; cores=8},
[PSCustomObject]#{sockets=4; cores=4}
)
}
}
$LKPQuotas | ConvertTo-Json
Output of test data:
{
"quotas": {
"volume_gigabytes_basic": [
"#{value=1225; used=123}",
"#{value=1746; used=274}",
"#{value=1747; used=409}"
],
"volume_gigabytes_fast": [
"#{value=1252; used=404}",
"#{value=1325; used=438}",
"#{value=1048; used=820}"
],
"images_gigabytes": [
"#{used=613}",
"#{used=690}",
"#{used=278}"
],
"compute_cores": [
"#{sockets=1; cores=8}",
"#{sockets=4; cores=4}"
]
}
}
Processing test data and getting results:
$valprops = #{N='value'; E={[uint32]$_.value}},
#{N='used'; E={[uint32]$_.used}}
$LKPQuotas.quotas.psobject.Properties |
ForEach-Object -Process {$prop = $_.Name
$psobj = [ordered]#{Name=$prop}
$LKPQuotas.quotas.$prop |
Select-Object -Property $valprops |
Measure-Object -Property value,used -Sum |
ForEach-Object -Process {$psobj[$_.Property]=$_.Sum}
[PSCustomObject]$psobj}
Output of results:
Name value used
---- ----- ----
volume_gigabytes_basic 4718 806
volume_gigabytes_fast 3625 1662
images_gigabytes 0 1581
compute_cores 0 0