Uid based colors. Closes #112

lib/db/session.php

@@ -64,7 +64,7 @@ class Db_Session extends \OCA\Documents\Db {
 					->getData()
 		;
 		
-		$memberColor = Helper::getRandomColor();
+		$memberColor = Helper::getMemberColor($uid);
 		
 		$member = new Db_Member(array(
 			$session['es_id'], 

lib/helper.php

@@ -1,4 +1,5 @@
 <?php
+
 /**
  * ownCloud - Documents App
  *
@@ -11,43 +12,133 @@
 
 namespace OCA\Documents;
 
-class Helper{
-	
+class Helper {
+
 	const APP_ID = 'documents';
-	
+
 	public static function getNewFileName($view, $path, $prepend = ' '){
 		$fileNum = 1;
-		
+
 		while ($view->file_exists($path)){
 			$fileNum += 1;
-			$path = preg_replace('/(\.odt|' . $prepend . '\(\d+\)\.odt)$/', $prepend . '(' .$fileNum . ').odt', $path);
+			$path = preg_replace('/(\.odt|' . $prepend . '\(\d+\)\.odt)$/', $prepend . '(' . $fileNum . ').odt', $path);
 		};
-		
+
 		return $path;
 	}
-	
+
 	public static function isVersionsEnabled(){
 		return \OCP\App::isEnabled('files_versions');
 	}
-	
+
 	public static function getRandomColor(){
 		$str = dechex(floor(rand(0, 16777215)));
 		return '#' . str_pad($str, 6, "0", STR_PAD_LEFT);
 	}
-	
-	public static  function debugLog($message){
+
+	public static function getMemberColor($name){
+		$hash = md5($name);
+		$maxRange = hexdec('ffffffffffffffffffffffffffffffff');
+		$hue = hexdec($hash) / $maxRange * 256;
+		return '#' . self::convertHSLToRGB($hue, 90, 60);
+	}
+
+	public static function debugLog($message){
 		self::log($message, \OCP\Util::DEBUG);
 	}
 
-	public static  function warnLog($message){
+	public static function warnLog($message){
 		self::log($message, \OCP\Util::WARN);
 	}
 
-	public static  function errorLog($message){
+	public static function errorLog($message){
 		self::log($message, \OCP\Util::ERROR);
 	}
-	
+
 	public static function log($message, $level){
 		\OCP\Util::writeLog(self::APP_ID, $message, $level);
 	}
-}
+
+	protected static function convertHSLToRGB($iH, $iS, $iV){
+		if ($iH < 0){
+			$iH = 0;   // Hue:
+		}
+		if ($iH > 360){
+			$iH = 360; //   0-360
+		}
+		if ($iS < 0){
+			$iS = 0;   // Saturation:
+		}
+		if ($iS > 100){
+			$iS = 100; //   0-100
+		}
+		if ($iV < 0){
+			$iV = 0;   // Lightness:
+		}
+		if ($iV > 100){
+			$iV = 100; //   0-100
+		}
+
+		$dS = $iS / 100.0; // Saturation: 0.0-1.0
+		$dV = $iV / 100.0; // Lightness:  0.0-1.0
+		$dC = $dV * $dS;   // Chroma:     0.0-1.0
+		$dH = $iH / 60.0;  // H-Prime:    0.0-6.0
+		$dT = $dH;	   // Temp variable
+
+		while ($dT >= 2.0)
+			$dT -= 2.0; // php modulus does not work with float
+		$dX = $dC * (1 - abs($dT - 1));	 // as used in the Wikipedia link
+
+		switch ($dH){
+			case($dH >= 0.0 && $dH < 1.0):
+				$dR = $dC;
+				$dG = $dX;
+				$dB = 0.0;
+				break;
+			case($dH >= 1.0 && $dH < 2.0):
+				$dR = $dX;
+				$dG = $dC;
+				$dB = 0.0;
+				break;
+			case($dH >= 2.0 && $dH < 3.0):
+				$dR = 0.0;
+				$dG = $dC;
+				$dB = $dX;
+				break;
+			case($dH >= 3.0 && $dH < 4.0):
+				$dR = 0.0;
+				$dG = $dX;
+				$dB = $dC;
+				break;
+			case($dH >= 4.0 && $dH < 5.0):
+				$dR = $dX;
+				$dG = 0.0;
+				$dB = $dC;
+				break;
+			case($dH >= 5.0 && $dH < 6.0):
+				$dR = $dC;
+				$dG = 0.0;
+				$dB = $dX;
+				break;
+			default:
+				$dR = 0.0;
+				$dG = 0.0;
+				$dB = 0.0;
+				break;
+		}
+
+		$dM = $dV - $dC;
+		$dR += $dM;
+		$dG += $dM;
+		$dB += $dM;
+		$dR *= 255;
+		$dG *= 255;
+		$dB *= 255;
+
+		$dR = str_pad(dechex(round($dR)), 2, "0", STR_PAD_LEFT);
+		$dG = str_pad(dechex(round($dG)), 2, "0", STR_PAD_LEFT);
+		$dB = str_pad(dechex(round($dB)), 2, "0", STR_PAD_LEFT);
+		return $dR.$dG.$dB;
+	}
+
+}