First pass on the logs

The newly-added logs manage a list of messages. Entities do register a
message to it when hitting each other. Display is created, but not yet
added to the layout actually displayed.

squirrelbattle/interfaces.py

@@ -7,6 +7,26 @@ from typing import List, Optional
 from squirrelbattle.display.texturepack import TexturePack
 
 
+class Logs:
+    """
+    The logs object stores the messages to display. It is encapsulating a list
+    of such messages, to allow multiple pointers to keep track of it even if
+    the list was to be reassigned.
+    """
+
+    def __init__(self) -> None:
+        self.messages = []
+
+    def add_message(self, msg: str) -> None:
+        self.messages.append(msg)
+
+    def add_messages(self, msg: List[str]) -> None:
+        self.messages += msg
+
+    def clear(self) -> None:
+        self.messages = []
+
+
 class Map:
     """
     Object that represents a Map with its width, height
@@ -18,6 +38,7 @@ class Map:
     start_x: int
     tiles: List[List["Tile"]]
     entities: List["Entity"]
+    logs: Logs
     # coordinates of the point that should be
     # on the topleft corner of the screen
     currentx: int
@@ -362,19 +383,22 @@ class FightingEntity(Entity):
     def dead(self) -> bool:
         return self.health <= 0
 
-    def hit(self, opponent: "FightingEntity") -> None:
+    def hit(self, opponent: "FightingEntity") -> str:
         """
         Deals damage to the opponent, based on the stats
         """
-        opponent.take_damage(self, self.strength)
+        return f"{self.name} hits {opponent.name}. "\
+            + opponent.take_damage(self, self.strength)
 
-    def take_damage(self, attacker: "Entity", amount: int) -> None:
+    def take_damage(self, attacker: "Entity", amount: int) -> str:
         """
         Take damage from the attacker, based on the stats
         """
         self.health -= amount
         if self.health <= 0:
             self.die()
+        return f"{self.name} takes {amount} damage."\
+            + (f" {self.name} dies." if self.health <= 0 else "")
 
     def die(self) -> None:
         """