Framework/Abstracts/EventBase.ps1

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using namespace System.Management.Automation
Set-StrictMode -Version Latest

# Class for providing capability to fire events,
# also includes support to fire AzSKGenericEvent and holds InvocationContext
class EventBase
{
    [string] $RunIdentifier = "default";
    [InvocationInfo] $InvocationContext;

    [string] GenerateRunIdentifier()
    {
        return $(Get-Date -format "yyyyMMdd_HHmmss");
    }

    hidden [void] PublishEvent([string] $eventType, [PSObject] $eventArgument)
    {
        New-Event -SourceIdentifier $eventType  `
            -Sender $this `
            -EventArguments $eventArgument | Out-Null
    }

    [void] PublishException([ErrorRecord] $eventArgument)
    {
        $this.PublishEvent([AzSKGenericEvent]::Exception, $eventArgument);
    }

    [MessageData[]] PublishCustomMessage([MessageData[]] $messageData)
    {
        if($messageData)
        {
            $this.PublishEvent([AzSKGenericEvent]::CustomMessage, $messageData);
            return $messageData;
        }
        return @();
    }

    [MessageData[]] PublishCustomMessage([string] $message, [MessageType] $messageType)
    {
        return $this.PublishCustomMessage([MessageData]::new($message, $messageType));
    }

    [MessageData[]] PublishCustomMessage([string] $message, [PSObject] $dataObject)
    {
        return $this.PublishCustomMessage([MessageData]::new($message, $dataObject));
    }

    [MessageData[]] PublishCustomMessage([string] $message)
    {
        return $this.PublishCustomMessage($message, [MessageType]::Info);
    }

    [string] GetModuleName()
    {
        if($this.InvocationContext)
        {
            return $this.InvocationContext.MyCommand.Module.Name;
        }

        throw [System.ArgumentException] "The parameter 'InvocationContext' is not set"
    }

    [CommandDetails] GetCommandMetadata()
    {
        if($this.InvocationContext)
        {
            $commandNoun = $this.InvocationContext.MyCommand.Noun
            if(-not [string]::IsNullOrWhiteSpace($this.InvocationContext.MyCommand.Module.Prefix))
            {
                # Remove the module prefix from command name
                $commandNoun = $commandNoun.TrimStart($this.InvocationContext.MyCommand.Module.Prefix);
            }

            return [CommandHelper]::Mapping | 
                                Where-Object { $_.Noun -eq $commandNoun -and $_.Verb -eq $this.InvocationContext.MyCommand.Verb } | 
                                Select-Object -First 1;
        }

        throw [System.ArgumentException] "The parameter 'InvocationContext' is not set"
    }

    [bool] IsLatestVersionRequired()
    {
        if($this.InvocationContext)
        {
            $commandNoun = $this.InvocationContext.MyCommand.Noun
            if(-not [string]::IsNullOrWhiteSpace($this.InvocationContext.MyCommand.Module.Prefix))
            {
                # Remove the module prefix from command name
                $commandNoun = $commandNoun.TrimStart($this.InvocationContext.MyCommand.Module.Prefix);
            }

            $mapping = [CommandHelper]::Mapping | 
                                Where-Object { $_.Noun -eq $commandNoun -and $_.Verb -eq $this.InvocationContext.MyCommand.Verb } | 
                                Select-Object -First 1;
            return $mapping.IsLatestRequired;
        }

        throw [System.ArgumentException] "The parameter 'InvocationContext' is not set"
    }

    [System.Version] GetCurrentModuleVersion()
    {
        if($this.InvocationContext)
        {
            return [System.Version] ($this.InvocationContext.MyCommand.Version);
        }

        # Return default version which is 0.0.
        return [System.Version]::new();
    }

    [string[]] ConvertToStringArray([string] $stringArray)
    {
        $result = @();
        if(-not [string]::IsNullOrWhiteSpace($stringArray))
        {
            $result += $stringArray.Split(',', [StringSplitOptions]::RemoveEmptyEntries) | 
                            Where-Object { -not [string]::IsNullOrWhiteSpace($_) } |
                            ForEach-Object { $_.Trim() } |
                            Select-Object -Unique;
        }
        return $result;
    }

    # Static Methods
    static [void] PublishGenericException([ErrorRecord] $eventArgument)
    {
        [EventBase]::new().PublishException($eventArgument);
    }

    static [void] PublishGenericCustomMessage([string] $message)
    {
        [EventBase]::PublishGenericCustomMessage($message, [MessageType]::Info);
    }

    static [void] PublishGenericCustomMessage([string] $message, [MessageType] $messageType)
    {
        [EventBase]::new().PublishCustomMessage($message, $messageType);
    }
}