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Just demoing Begin, Process, End with some pseudo-code
Function Give-UserLicense ($User) {
#return $true
}
Function Add-UserLicenses {
param(
[Parameter(
Mandatory = $true,
ValueFromPipelineByPropertyName = $true,
ValueFromPipeline = $true
)][String[]]$Username
)
Begin {
# Create Session to O365 / Remote Exchange / Skype / SharePoint Session
# This may involve prompting for / loading credentials or extended time to import modules
Write-Verbose "Begin"
}
Process {
foreach ($User in $Username) {
try {
Give-UserLicense -Username $User
$User # Output back to pipeline
} catch {
# Log Error
}
}
}
End {
# Cleanup Session to O365 / Remote Exchange / Skype / SharePoint Session
Write-Verbose "END"
}
}
$SimpleArray = @('1', '2', '3', '4')
$ObjectArray = @(
[PSCustomObject] @{'Office' = 'Los Angeles'; 'Username' = 'UserOne'},
[PSCustomObject] @{'Office' = 'New York'; 'Username' = 'UserTwo'}
)
Function Add-UserLicensesWithoutBlocks {
param(
[Parameter(
Mandatory = $true,
ValueFromPipelineByPropertyName = $true,
ValueFromPipeline = $true
)][String[]]$Username
)
foreach ($User in $Username) {
try {
Give-UserLicense -Username $User
$User # Output back to pipeline
} catch {
# Log Error
}
}
}
Write-Verbose "Calling function that does have process block"
Add-UserLicenses -Username $SimpleArray -Verbose
$SimpleArray | Add-UserLicenses -Verbose
$ObjectArray | Add-UserLicenses -Verbose
Write-Verbose "Calling function that does not have process block"
Add-UserLicensesWithoutBlocks -Username $SimpleArray -Verbose
$SimpleArray | Add-UserLicensesWithoutBlocks -Verbose
$ObjectArray | Add-UserLicensesWithoutBlocks -Verbose
#Outputs:
# VERBOSE: Calling function that does have process block
# VERBOSE: Begin <-- notice the Begin and End blocks only occur once per call
# 1
# 2
# 3
# 4
# VERBOSE: END
# VERBOSE: Begin
# 1
# 2
# 3
# 4
# VERBOSE: END
# VERBOSE: Begin
# UserOne
# UserTwo
# VERBOSE: END
# VERBOSE: Calling function that does not have process block
# 1
# 2
# 3
# 4
# 4 <-- In this call, it only works on the last element of the collection
# UserTwo <-- Same here, it only works on the last element of the collection
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