[refactor] Move objets to separate files.

- ball
- bricks
- paddle
Update documentation and readme.
[fix] Game over: update player score.

bricks.py

@@ -0,0 +1,88 @@
+from screen import Screen, RED, YELLOW, GREEN
+from ball import Ball
+
+BRICK_WIDTH = 30
+BRICK_HEIGHT = 8
+BRICK_PADDING = 4
+BRICKS_PER_ROW = 7
+ROWS = 4
+
+
+class Brick:
+    def __init__(self, x: int, y: int, width: int, height: int, color: int):
+        """
+        Initialize a brick.
+        Args:  x (int): x-coordinate of the brick.  
+               y (int): y-coordinate of the brick.  
+               width (int): width of the brick.  
+               height (int): height of the brick.  
+               color (int): color of the brick.
+        """
+        self.x = x
+        self.y = y
+        self.width = width
+        self.height = height
+        self.color = color
+
+    def draw(self, screen: Screen):
+        """Draw brick."""
+        screen.fbuf.fill_rect(self.x, self.y, self.width, self.height, self.color)
+
+
+class BrickRow:
+    def __init__(self, brick_width: int, brick_height: int, padding:int, offset_top: int, color: int):
+        """
+        Initialize a row of bricks.
+        Args:  brick_width (int): width of each brick.  
+               brick_height (int): height of each brick.
+               padding (int): padding between bricks.
+               offset_top (int): y-coordinate of the top of the row.
+               color (int): color of the bricks.
+        """        
+        self.brick_width = brick_width
+        self.brick_height = brick_height
+        self.color = color
+        self.padding = padding
+        self.offset_top = offset_top
+        self.bricks = [Brick(padding + i * (brick_width + padding), offset_top, brick_width, brick_height, color) for i in range(BRICKS_PER_ROW)]
+        self.brick_x = [padding + i * (brick_width + padding) for i in range(BRICKS_PER_ROW)]
+        self.brick_y = [offset_top] * BRICKS_PER_ROW
+
+    def draw(self, screen: Screen):
+        """Draw all bricks in the row."""
+        for brick in self.bricks:
+            if brick is not None:
+                brick.draw(screen)
+
+    def hit(self, ball: Ball) -> bool:
+        """
+        Check if the ball hits any brick in the row and remove it if hit.
+        Args:  ball (Ball): The ball object to check for collision.
+        Returns: bool: True if the ball hits a brick, False otherwise.
+        """
+        for i, brick in enumerate(self.bricks):
+            if brick is not None:
+                if (brick.x <= ball.x <= brick.x + brick.width) and (brick.y <= ball.y <= brick.y + brick.height):
+                    # Remove the brick by setting it to None
+                    self.bricks[i] = None
+                    return True
+        return False
+
+
+
+def create_bricks() -> list[BrickRow]:
+    bricks = []
+    for row in range(ROWS):
+        if row == 0:
+            color = RED
+        elif row == 1:
+            color = YELLOW
+        else:
+            color = GREEN
+        bricks.append(
+            BrickRow(BRICK_WIDTH, 
+                    BRICK_HEIGHT, 
+                    BRICK_PADDING, 
+                    10 + row * (BRICK_HEIGHT + BRICK_PADDING), 
+                    color))
+    return bricks