dotnetlogviewer.ps1

<#
.SYNOPSIS
Reads, parses, and displays a tab-separated log file in a filterable grid view,
ordered by the most recent log entries.
#>
param(
    [Parameter(Mandatory=$true)]
    [string]$LogFilePath
)

# --- Function to Read and Structure the Tab-Separated Log ---
function Get-TabDelimitedLogs {
    param(
        [string]$Path
    )

    Write-Host "Reading and converting log file..." -ForegroundColor Cyan

    try {
        # 1. Read the content.
        # 2. Use ConvertFrom-Csv:
        #    -Header defines the columns based on your format (2025-10-31 3:00:00 PM HostName AppName LogLevel UserName Category Message).
        #    -Delimiter "`t" specifies the tab character for separation.
        #    -Skip 1 is used to skip the first line if it contains the column headers, as the header is defined above.
        $Logs = Get-Content -Path $Path | 
                ConvertFrom-Csv -Delimiter "`t" -Header "Timestamp", "HostName", "AppName", "LogLevel", "UserName", "Category", "Message"
        
        # 3. Process and convert the Timestamp column to a proper DateTime object
        $Logs = $Logs | Select-Object *, @{Name='DateTime'; Expression={[datetime]$_.Timestamp}} -ExcludeProperty Timestamp

        # 4. Sort the objects by the new DateTime column (most recent first)
        return $Logs | Sort-Object -Property DateTime -Descending

    } catch {
        Write-Error "Error parsing log file: $($_.Exception.Message)"
        return @() # Return an empty array on error
    }
}
# --- End of Function ---

function Show-LogGridView {
    param(
        [string]$Path
    )

    Write-Host "Loading logs from: $Path..." -ForegroundColor Green
    
    # 1. Parse and sort the logs
    $Logs = Get-TabDelimitedLogs -Path $Path

    if (-not $Logs) {
        Write-Host "No log entries found or file parsing failed. Cannot show grid." -ForegroundColor Red
        return
    }

    # 2. Display in Out-GridView
    Write-Host "Displaying grid. Close the window to refresh/exit." -ForegroundColor Yellow
    
    # Out-GridView provides the filter and sort capabilities automatically
    $Logs | Out-GridView -Title "Log Viewer - $Path (Close to Refresh/Exit)" -Wait
}

# --- Main Loop for Refresh Option ---
while ($true) {
    Show-LogGridView -Path $LogFilePath
    
    # After the user closes Out-GridView, ask if they want to refresh
    $Choice = Read-Host "`nLogs displayed. Do you want to [R]efresh or [E]xit? (R/E)"
    
    if ($Choice -ne "r" -and $Choice -ne "R") {
        break
    }
}