feat: select emoji after purchasing it

Author: emptybutton

src/ttt/entities/core/player/player.py

@@ -148,6 +148,9 @@ def buy_emoji(
         tracking.register_new(new_emoji)
         self.emojis.append(new_emoji)
 
+        self.selected_emoji_id = new_emoji.id
+        tracking.register_mutated(self)
+
     def emoji(self, random_emoji: Emoji) -> Emoji:
         if self.selected_emoji_id is None:
             return random_emoji

src/ttt/infrastructure/alembic/versions/43336a39f1e2_make_selected_emoji_id_deferred.py

@@ -0,0 +1,50 @@
+"""
+make `selected_emoji_id` deferred.
+
+Revision ID: 43336a39f1e2
+Revises: 55f7ecc0f5a4
+Create Date: 2025-06-27 09:04:30.539970
+
+"""
+
+from collections.abc import Sequence
+
+from alembic import op
+
+
+revision: str = "43336a39f1e2"
+down_revision: str | None = "55f7ecc0f5a4"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(
+        op.f("players_selected_emoji_id_fkey"), "players", type_="foreignkey",
+    )
+    op.create_foreign_key(
+        "players_selected_emoji_id_fkey",
+        "players",
+        "player_emojis",
+        ["selected_emoji_id"],
+        ["id"],
+        initially="DEFERRED",
+        deferrable=True,
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(
+        "players_selected_emoji_id_fkey", "players", type_="foreignkey",
+    )
+    op.create_foreign_key(
+        op.f("players_selected_emoji_id_fkey"),
+        "players",
+        "player_emojis",
+        ["selected_emoji_id"],
+        ["id"],
+    )
+    # ### end Alembic commands ###

src/ttt/infrastructure/sqlalchemy/tables.py

@@ -64,7 +64,7 @@ class TablePlayer(Base):
     id: Mapped[int] = mapped_column(BigInteger(), primary_key=True)
     account_stars: Mapped[int] = mapped_column(server_default="0")
     selected_emoji_id: Mapped[UUID | None] = mapped_column(
-        ForeignKey("player_emojis.id"),
+        ForeignKey("player_emojis.id", deferrable=True, initially="DEFERRED"),
     )
     number_of_wins: Mapped[int]
     number_of_draws: Mapped[int]