feat: Palettes.json.ps1 ( Fixes #118 )

Author: StartAutomating

4bitcss.com/Palettes.json.ps1

@@ -0,0 +1,167 @@
+if ($PSScriptRoot) { Push-Location $PSScriptRoot }
+$sparseClone = 
+    git.sparse https://github.com/mbadolato/iTerm2-Color-Schemes.git ../iTerm2-Color-Schemes -Pattern @(
+        '/windowsterminal/**/**.json'
+        '/CREDITS.md'    
+    )
+
+$creditLines = Get-Content ../iTerm2-Color-Schemes/CREDITS.md
+
+filter GetCredits {
+    $colorSchemeName = $_
+    $colorSchemePattern = [Regex]::Escape($colorSchemeName) -replace '\\ ', '[\s_]'
+    $markdownLinkPattern = '\[(?<text>.+?)\]\((?<link>.+?)\)'
+    foreach ($line in $creditLines) {
+        if (-not $line ) { continue }
+        if ($line -notmatch $colorSchemePattern) {
+            continue            
+        }
+        if ($line -notmatch $markdownLinkPattern) {
+            continue
+        }        
+        [PSCustomObject][Ordered]@{credit=$Matches.text; link=$Matches.link}
+    }
+}
+
+$jsonOutputRoot = Join-Path $PSScriptRoot json
+if (-not (Test-Path $jsonOutputRoot)) {
+    $null = New-Item -ItemType Directory -Path $jsonOutputRoot
+}
+
+filter GetLuma {
+    $colorString = $_
+    # Convert the background color to a uint32
+    $rgb = ($colorString -replace "#", "0x" -replace ';') -as [UInt32]
+    # then make it into a percentage red, green, and blue.
+    $r, $g, $b = ([float][byte](($rgb -band 0xff0000) -shr 16)/255),
+        ([float][byte](($rgb -band 0x00ff00) -shr 8)/255),
+        ([float][byte]($rgb -band 0x0000ff)/255)
+
+    # Calculate the luma of the background color
+    0.2126 * $R + 0.7152 * $G + 0.0722 * $B    
+}
+
+filter GetHSL {
+    $colorString = $_
+    # Convert the background color to a uint32
+    $rgb = ($colorString -replace "#", "0x" -replace ';') -as [UInt32]
+    # then make it into a percentage red, green, and blue.
+    $r, $g, $b = ([float][byte](($rgb -band 0xff0000) -shr 16)/255),
+        ([float][byte](($rgb -band 0x00ff00) -shr 8)/255),
+        ([float][byte]($rgb -band 0x0000ff)/255)
+
+    [float]$PercentRed = $R
+    [float]$PercentGreen = $G
+    [float]$PercentBlue = $B
+
+    $min = $max = $PercentRed
+    foreach ($_ in $PercentGreen, $PercentBlue) {
+        if ($_ -lt $min) { $min = $_ }
+        if ($_ -ge $max) { $max = $_ }
+    }
+
+    $Luminance = ($min + $max)  / 2
+    $delta = $max - $min
+    
+    if (-not $delta) {
+        $hue = $saturation = 0                 
+    } else {
+        $saturation = $delta
+        $saturation /= (1 - [Math]::Abs(((2 * $Luminance) -1)))
+        
+        $hue =  
+            if ($Max -eq $PercentRed){
+                ($PercentGreen - $PercentBlue)/$delta % 6      
+            } elseif ($max -eq $PercentGreen) {
+                (($PercentBlue - $PercentRed)/ $delta) + 2
+            } else {                
+                (($PercentRed - $PercentGreen)/ $delta) + 4
+            }
+    }
+    $hue*=60
+    if ($hue -gt 360) { $hue -= 360 } 
+    if ($hue -lt 0) { $hue = 360 + $hue } 
+    [PSCustomObject][Ordered]@{
+        PSTypeName = 'Color'
+        R = $R
+        G = $G
+        B = $B
+        RGB = $colorString
+        Hue = $hue
+        Saturation = $saturation
+        Luminance = $Luminance
+    }
+}
+
+$paletteJsonFiles = $sparseClone | Where-Object Extension -eq '.json'
+$allPalettes = [Ordered]@{}
+
+$createdFiles = foreach ($paletteJsonFile in $paletteJsonFiles) {
+    $paletteContent = [IO.File]::ReadAllText($paletteJsonFile.FullName)
+    $paletteObject = $paletteContent | ConvertFrom-Json
+    $paletteObject.pstypenames.insert(0, 'Palette')
+    # and determine the name of the scheme and it's files.
+    $paletteName = $colorSchemeName = $paletteObject.Name
+    $colorSchemeFileName =
+        $paletteObject.Name | Convert-4BitName
+        
+    $creditInfo = @($colorSchemeName | GetCredits)[0]
+    $paletteObject | 
+        Add-Member NoteProperty creditTo -Force -PassThru -Value $creditInfo.credit |
+        Add-Member NoteProperty creditToLink -Force -Value $creditInfo.link
+    
+    if ($paletteObject.background) {
+        $paletteObject | 
+            Add-Member NoteProperty luma -Force -Value $($paletteObject.Background | GetLuma)
+    }
+
+    if ($paletteObject.background) {
+        $paletteObject | 
+            Add-Member NoteProperty hue -Force -Value $($paletteObject.Background | GetHSL | Select-Object -ExpandProperty Hue)
+    }
+
+    $IsBright = $paletteObject.luma -ge .4
+
+    $paletteObject | Add-Member NoteProperty IsBright $IsBright -Force
+    $paletteObject | Add-Member NoteProperty IsDark (-not $IsBright) -Force
+
+    if ($paletteObject.foreground) {
+        $paletteObject | 
+            Add-Member NoteProperty foregroundLuma -Force -Value $($paletteObject.foreground | GetLuma)
+    }
+
+    if ($paletteObject.background) {
+        $paletteObject | 
+            Add-Member NoteProperty foregroundHue -Force -Value $($paletteObject.foreground | GetHSL | Select-Object -ExpandProperty Hue)
+    }
+
+    if ($paletteObject.foreground -and $paletteObject.background) {
+        $contrastLevel = [Math]::Abs(
+            ($paletteObject.background | GetLuma) - ($paletteObject.foreground | GetLuma)
+        )
+        $paletteObject | 
+            Add-Member NoteProperty contrast -Force -Value $contrastLevel
+    }    
+
+    if (-not $colorSchemeFileName) { continue }
+    $paletteObject | Add-Member NoteProperty FileName $colorSchemeFileName -Force
+    $jsonOutputPath = Join-Path $jsonOutputRoot "$colorSchemeFileName.json"
+    $paletteObject | ConvertTo-Json -Depth 4 | Set-Content -Path $jsonOutputPath
+    Get-Item $jsonOutputPath
+    
+
+    $allPalettes[$colorSchemeFileName] = $paletteObject    
+}
+
+if ($site.FilesProcessed) {
+    foreach ($file in $createdFiles) {
+        $site.FilesProcessed[$file.FullName] = $true
+    }
+}
+
+
+# $allPalettes | ConvertTo-Json -Depth 10 | Set-Content -Path "./Palettes.json"
+# Get-Item -Path ./Palettes.json
+$allPalettes
+
+if ($PSScriptRoot) { Pop-Location}