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‎dev_tools/Minify-JS.ps1‎

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# JavaScript Minifier for Provinent Scripture Study
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# Conservative approach: removes comments only, preserves code structure and UTF-8 encoding
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param(
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[switch]$NoMinify = $false # Optional: skip processing
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)
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# Define file mappings
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$fileMappings = @(
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@{ Source = "../src/main.js"; Destination = "../public/main.js" },
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@{ Source = "../src/sw.js"; Destination = "../public/sw.js" },
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@{ Source = "../src/modules/api.js"; Destination = "../public/modules/api.js" },
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@{ Source = "../src/modules/navigation.js"; Destination = "../public/modules/navigation.js" },
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@{ Source = "../src/modules/passage.js"; Destination = "../public/modules/passage.js" },
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@{ Source = "../src/modules/pdf.js"; Destination = "../public/modules/pdf.js" },
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@{ Source = "../src/modules/settings.js"; Destination = "../public/modules/settings.js" },
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@{ Source = "../src/modules/state.js"; Destination = "../public/modules/state.js" },
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@{ Source = "../src/modules/strongs.js"; Destination = "../public/modules/strongs.js" },
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@{ Source = "../src/modules/ui.js"; Destination = "../public/modules/ui.js" }
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)
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# Check if JS files exist
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Write-Host "Checking file dependencies..." -ForegroundColor Yellow
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$missingFiles = @()
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foreach ($mapping in $fileMappings) {
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if (-not (Test-Path $mapping.Source)) {
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$missingFiles += (Split-Path $mapping.Source -Leaf)
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}
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}
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if ($missingFiles.Count -gt 0) {
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Write-Host "Missing files:" -ForegroundColor Red
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$missingFiles | ForEach-Object { Write-Host " - $_" -ForegroundColor Red }
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exit 1
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}
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Write-Host "All files found" -ForegroundColor Green
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function Remove-JSComments {
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param([string]$Content)
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# Process line by line to avoid encoding issues
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$lines = $Content -split "`r?`n"
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$processedLines = @()
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$inBlockComment = $false
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$blockCommentBuffer = @()
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foreach ($line in $lines) {
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$currentLine = $line
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# Handle block comments spanning multiple lines
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if ($inBlockComment) {
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$endIndex = $currentLine.IndexOf('*/')
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if ($endIndex -ge 0) {
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# End of block comment found
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$currentLine = $currentLine.Substring($endIndex + 2)
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$inBlockComment = $false
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# Don't add the line if it only contained the comment end
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if (-not [string]::IsNullOrWhiteSpace($currentLine)) {
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$processedLines += $currentLine
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}
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continue
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} else {
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# Still inside block comment, skip this line
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continue
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}
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}
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# Check for block comments
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$blockStartIndex = $currentLine.IndexOf('/*')
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if ($blockStartIndex -ge 0) {
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$blockEndIndex = $currentLine.IndexOf('*/', $blockStartIndex + 2)
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if ($blockEndIndex -ge 0) {
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# Block comment starts and ends on same line
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$beforeComment = $currentLine.Substring(0, $blockStartIndex)
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$afterComment = $currentLine.Substring($blockEndIndex + 2)
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$currentLine = $beforeComment + $afterComment
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# Check if line is now empty
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if ([string]::IsNullOrWhiteSpace($currentLine)) {
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continue
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}
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} else {
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# Block comment starts on this line but continues
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$beforeComment = $currentLine.Substring(0, $blockStartIndex)
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# Only keep content before comment if it's not just whitespace
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if (-not [string]::IsNullOrWhiteSpace($beforeComment)) {
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$currentLine = $beforeComment
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} else {
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$currentLine = ''
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}
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$inBlockComment = $true
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}
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}
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# Handle single-line comments only if not in block comment
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if (-not $inBlockComment -and -not [string]::IsNullOrEmpty($currentLine)) {
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$commentIndex = $currentLine.IndexOf('//')
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if ($commentIndex -ge 0) {
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# Check if it's likely a URL or special pattern that should be preserved
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$beforeComment = $currentLine.Substring(0, $commentIndex)
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# Skip if it's a URL, regex, or quoted string containing //
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$isUrl = $beforeComment -match 'https?:$|://$|["'']$' -or
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$currentLine -match '"[^"]*//[^"]*"' -or
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$currentLine -match "'[^']*//[^']*'" -or
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$currentLine -match '\/[^\/]*\/[gmiyus]*\s*//' # regex pattern followed by comment
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if (-not $isUrl) {
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# Remove the single-line comment and everything after it
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$currentLine = $beforeComment
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}
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}
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}
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# Only add non-empty lines (or lines that only had trailing whitespace before comment)
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$trimmedLine = $currentLine.Trim()
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if (-not [string]::IsNullOrEmpty($trimmedLine)) {
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$processedLines += $currentLine
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}
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}
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# Rejoin with original line endings
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return $processedLines -join "`r`n"
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}
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function Get-File-Size-Stats {
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param(
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[string]$originalContent,
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[string]$processedContent,
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[string]$fileName
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)
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$originalSize = [System.Text.Encoding]::UTF8.GetByteCount($originalContent)
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$processedSize = [System.Text.Encoding]::UTF8.GetByteCount($processedContent)
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$savings = if ($originalSize -gt 0) { [math]::Round((1 - $processedSize / $originalSize) * 100, 1) } else { 0 }
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# Count lines
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$originalLines = ($originalContent -split "`r`n").Count
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$processedLines = ($processedContent -split "`r`n").Count
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$linesReduction = if ($originalLines -gt 0) { [math]::Round((1 - $processedLines / $originalLines) * 100, 1) } else { 0 }
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return @{
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OriginalSize = $originalSize
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ProcessedSize = $processedSize
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SavingsPercent = $savings
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OriginalLines = $originalLines
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ProcessedLines = $processedLines
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LinesReduction = $linesReduction
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FileName = $fileName
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}
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}
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# Track statistics
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$totalOriginalSize = 0
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$totalProcessedSize = 0
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$totalOriginalLines = 0
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$totalProcessedLines = 0
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$fileStats = @()
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# Ensure backup directory exists
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$backupDir = "../src/modules"
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if (!(Test-Path $backupDir)) {
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New-Item -ItemType Directory -Path $backupDir -Force
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}
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Write-Host "Processing JavaScript files..." -ForegroundColor Yellow
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# Process each file
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foreach ($mapping in $fileMappings) {
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$sourceFile = $mapping.Source
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$destFile = $mapping.Destination
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$fileName = Split-Path $sourceFile -Leaf
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Write-Host " Processing: $fileName" -ForegroundColor Cyan
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if (Test-Path $sourceFile) {
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# Backup destination file if it exists
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if (Test-Path $destFile) {
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$backupPath = Join-Path $backupDir "$fileName.backup_$(Get-Date -Format 'yyyyMMdd_HHmmss')"
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Write-Host " Backing up existing file to: $backupPath" -ForegroundColor Yellow
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Copy-Item $destFile $backupPath -Force
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}
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# Read source file with proper UTF-8 encoding using .NET methods
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$originalContent = [System.IO.File]::ReadAllText($sourceFile, [System.Text.Encoding]::UTF8)
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$processedContent = $originalContent
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if (-not $NoMinify) {
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# Remove comments only (conservative approach)
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$processedContent = Remove-JSComments -Content $processedContent
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}
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# Get file statistics
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$stats = Get-File-Size-Stats -originalContent $originalContent -processedContent $processedContent -fileName $fileName
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$totalOriginalSize += $stats.OriginalSize
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$totalProcessedSize += $stats.ProcessedSize
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$totalOriginalLines += $stats.OriginalLines
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$totalProcessedLines += $stats.ProcessedLines
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$fileStats += $stats
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if (-not $NoMinify) {
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Write-Host " Processed: $([math]::Round($stats.OriginalSize/1KB,1))KB -> $([math]::Round($stats.ProcessedSize/1KB,1))KB ($($stats.SavingsPercent)%)" -ForegroundColor White
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Write-Host " Lines: $($stats.OriginalLines) -> $($stats.ProcessedLines) ($($stats.LinesReduction)%)" -ForegroundColor Gray
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} else {
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Write-Host " Copied: $([math]::Round($stats.OriginalSize/1KB,1))KB, $($stats.OriginalLines) lines" -ForegroundColor White
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}
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# Ensure destination directory exists
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$destDir = Split-Path $destFile -Parent
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if (!(Test-Path $destDir)) {
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New-Item -ItemType Directory -Path $destDir -Force
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}
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# Write processed content with proper UTF-8 encoding using .NET methods
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[System.IO.File]::WriteAllText($destFile, $processedContent, [System.Text.Encoding]::UTF8)
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}
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}
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# Calculate total savings
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$totalSavings = if ($totalOriginalSize -gt 0) { [math]::Round((1 - $totalProcessedSize / $totalOriginalSize) * 100, 1) } else { 0 }
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$totalLinesReduction = if ($totalOriginalLines -gt 0) { [math]::Round((1 - $totalProcessedLines / $totalOriginalLines) * 100, 1) } else { 0 }
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Write-Host "`nProcessing complete!" -ForegroundColor Green
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# Display statistics
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$finalSizeKB = [math]::Round($totalProcessedSize / 1KB, 1)
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$originalSizeKB = [math]::Round($totalOriginalSize / 1KB, 1)
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Write-Host "File size statistics:" -ForegroundColor Yellow
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Write-Host " Original total: $originalSizeKB KB" -ForegroundColor Gray
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Write-Host " Final size: $finalSizeKB KB" -ForegroundColor Green
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if (-not $NoMinify) {
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$savedKB = [math]::Round(($totalOriginalSize - $totalProcessedSize) / 1KB, 1)
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Write-Host " Space saved: $totalSavings% ($savedKB KB)" -ForegroundColor Green
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Write-Host " Lines reduced: $totalOriginalLines -> $totalProcessedLines ($totalLinesReduction%)" -ForegroundColor Cyan
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}
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Write-Host "`nBackups stored in: $backupDir" -ForegroundColor Gray
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Write-Host "UTF-8 encoding preserved for all special characters" -ForegroundColor Green
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# Usage examples
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Write-Host "`nUsage examples:" -ForegroundColor Gray
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Write-Host " .\Build-JS.ps1 # Remove comments only (conservative)"
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Write-Host " .\Build-JS.ps1 -NoMinify # Copy files only (no modification)"
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if (-not $NoMinify) {
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Write-Host "`nNote: Conservative minification - only comments removed, UTF-8 and code structure preserved" -ForegroundColor Yellow
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Write-Host "Removes: // single-line comments, /* */ block comments, preserves URLs and special patterns" -ForegroundColor Gray
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}

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