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Log Helper writes to Event Log, console host or file depending on log source.
<#
Logging functions.
#>
function logError([string]$logsrc, [string]$msg) {
if ([String]::IsNullOrWhiteSpace($logsrc)) {
write-log -msg $msg -level "ERROR"
}
elseif (@(".txt", ".log").Contains([System.IO.Path]::GetExtension($logsrc)) -eq $true) {
write-log -msg $msg -level "ERROR" -file $logsrc
}
else {
# write error msg to Application EventLog
Write-EventLog -LogName Application -Source $logsrc -EventId 500 -EntryType Error -Message $msg -Category 0
}
}
function logInfo([string]$logsrc, [string]$msg) {
if ([String]::IsNullOrWhiteSpace($logsrc)) {
write-log -msg $msg -level "INFO"
}
elseif (@(".txt", ".log").Contains([System.IO.Path]::GetExtension($logsrc)) -eq $true) {
write-log -msg $msg -level "INFO" -file $logsrc
}
else {
# write info msg to Application EventLog
Write-EventLog -LogName Application -Source $logsrc -EventId 200 -EntryType Information -Message $msg -Category 0
}
}
function logWarning([string]$logsrc, [string]$msg) {
if ([String]::IsNullOrWhiteSpace($logsrc)) {
Write-Host $msg -ForegroundColor Yellow
}
elseif (@(".txt", ".log").Contains([System.IO.Path]::GetExtension($logsrc)) -eq $true) {
write-log -msg $msg -level "WARN" -file $logsrc
}
else {
Write-EventLog -LogName Application -Source $logsrc -EventId 400 -EntryType Warning -Message $msg -Category 0
}
}
# write log lines to a file
function write-log {
[CmdletBinding()]
param (
[Parameter(Mandatory=$true)]
[string]$msg,
[Parameter(Mandatory=$false)]
[ValidateSet("INFO","WARN","ERROR","DEBUG")]
[string]$level = "INFO",
[Parameter(Mandatory=$false)]
[string]$file
)
$stamp = (get-date).ToString("yyyy/MM/dd HH:mm:ss")
$line = "$stamp $level $msg"
if ($file) {
add-content $file -Value $line
}
# always write to console
if ($level -eq "ERROR") {
write-host $msg -ForegroundColor Red
}
elseif ($level -eq "WARN") {
write-host $msg -ForegroundColor Yellow
}
else {
write-host $msg
}
}
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