Material-Color/generate.php

<?php
$use_variables = false;

$classes = [
	"alert" => ["background-color" => "m", "color" => "t!"],
	"alert .alert-link" => ["color" => "t!"],
	"alert .alert-heading" => ["color" => "t!"],
	"badge" => ["background-color" => "m", "color" => "t"], 
	"btn" => ["background-color" => "m", "color" => "t"],
	"bg" => ["background-color" => "m"],
	"list-group-item" => ["background-color" => "m", "color" => "t"],
	"border" => ["border-color" => "m", "border-width" => "1px"],
	"text" => ["color" => "m"]
];

$colors = [
	"red" => "#f44336",
	"pink" => "#e91e63",
	"purple" => "#9c27b0",
	"deep-purple" => "#673ab7",
	"indigo" => "#3f51b5",
	"blue" => "#2196f3",
	"light-blue" => "#03a9f4",
	"cyan" => "#00bcd4",
	"teal" => "#009688",
	"green" => "#4caf50",
	"light-green" => "#8bc34a",
	"lime" => "#cddc39",
	"yellow" => "#ffeb3b",
	"amber" => "#ffc107",
	"orange" => "#ff9800",
	"deep-orange" => "#ff5722",
	"brown" => "#795548",
	"grey" => "#9e9e9e",
	"blue-grey" => "#607d8b"
];

$texts = [
	"red" => "white",
	"pink" => "white",
	"purple" => "white",
	"deep-purple" => "white",
	"indigo" => "white",
	"blue" => "white",
	"light-blue" => "black",
	"cyan" => "black",
	"teal" => "white",
	"green" => "white",
	"light-green" => "black",
	"lime" => "black",
	"yellow" => "black",
	"amber" => "black",
	"orange" => "black",
	"deep-orange" => "white",
	"brown" => "white",
	"grey" => "black",
	"blue-grey" => "white"
];


/* License header */
$year = date('Y');
echo <<<END
/* Material-Color.css
 * Copyright (c) $year Netsyms Technologies
 * MIT License
 * https://source.netsyms.com/Netsyms/Material-Color
 */

END;

/* Make CSS variables */
if ($use_variables) {
	echo ":root {\n";
	foreach ($colors as $k => $v) {
		if (strpos($k, "text-") !== FALSE) {
			continue;
		}
		echo "\t--material-color-$k: $v;\n";
	}
	echo "}\n\n";
}

/* The fun bit */
foreach ($classes as $c => $props) {
	foreach ($colors as $k => $v) {
		$t = $texts[$k];
		// Save a few bytes
		if ($t == "white") {
			$t = "#fff";
		} else if ($t == "black") {
			$t = "#000";
		}
		
		// Color setup
		if ($use_variables) {
			$m = "var(--material-color-$k)";
		} else {
			$m = $v;
		}

		// Class
		if (strpos($c, " ") !== FALSE) {
			$classes = explode(" ", $c);
			foreach ($classes as $cl) {
				if (strpos($cl, ".") === 0) {
					echo "$cl ";
				} else {
					echo ".$cl-$k ";
				}
			}
			echo "{\n";
		} else {
			echo ".$c-$k {\n";
		}
		
		foreach ($props as $prop => $val) {
			echo "\t$prop: ";
			if (strpos($val, "m") === 0) {
				echo $m;
			} else if (strpos($val, "t") === 0) {
				echo $t;
			} else {
				echo $val;
			}
			if (strpos($val, "!") === 1) {
				echo " !important";
			}
			echo ";\n";
		}
		
		// Finish it off		
		echo "}\n";
	}
}
?>