Merge Score and Credits into PlayerSession, avoid directly setting the values.

src/de/teamteamteam/spacescooter/brain/PlayerSession.java

@@ -0,0 +1,91 @@
+package de.teamteamteam.spacescooter.brain;
+
+/**
+ * This class is responsible for keeping track of all the data a player session 
+ * usually contains, such as earned score points, earned credits, activated ship upgrades
+ * and more.
+ */
+public class PlayerSession {
+
+	/**
+	 * The players current score.
+	 */
+	private static int score;
+	
+	/**
+	 * The players current amount of credits.
+	 */
+	private static int credits;
+	
+	
+	/**
+	 * Private constructor, this class will never be instantiated.
+	 */
+	private PlayerSession() {}
+	
+	
+	/**
+	 * Get the current amount of credits the player has.
+	 */
+	public static int getCredits() {
+		return PlayerSession.credits;
+	}
+	
+	/**
+	 * Add a number of credits to the players credits.
+	 */
+	public static void addCredits(int credits) {
+		PlayerSession.credits += credits;
+	}
+
+	/**
+	 * Remove a number of credits from the players credits.
+	 * This is capped at zero.
+	 */
+	public static void removeCredits(int credits) {
+		PlayerSession.credits -= credits;
+		if(PlayerSession.credits < 0) {
+			PlayerSession.credits = 0;
+		}
+	}
+
+	/**
+	 * Get the current player score.
+	 */
+	public static int getScore() {
+		return PlayerSession.score;
+	}
+	
+	/**
+	 * Add a number of points to the players score.
+	 * There is a maximum of X points to reach, score is capped then.
+	 */
+	public static void addScore(int points) {
+		PlayerSession.score += points;
+		if(PlayerSession.score > GameConfig.maximumPlayerScore) {
+			PlayerSession.score = GameConfig.maximumPlayerScore;
+		}
+	}
+
+	/**
+	 * Remove a number of points from the players score.
+	 * This is capped at zero.
+	 */
+	public static void removeScore(int points) {
+		PlayerSession.score -= points;
+		if(PlayerSession.score < 0) {
+			PlayerSession.score = 0;
+		}
+	}
+	
+	/**
+	 * This will reset all data from the players session.
+	 * Used to initialize the session at the beginning of the game or
+	 * after the player went game over and entered his name for the highscore.
+	 */
+	public static void reset() {
+		PlayerSession.score = 0;
+		PlayerSession.credits = 0;
+	}
+	
+}