add EdgeDB dataschema and module

dbschema/default.esdl

@@ -0,0 +1,82 @@
+module default {
+
+  type GameBoard {
+    overloaded required id: uuid {
+      readonly := true;
+      constraint exclusive;
+    }
+    url: str {
+      readonly := true;
+    }
+    required created_at: datetime {
+      readonly := true;
+    }
+    required turns: int32 {
+      readonly := true;
+    }
+    required map: str {
+      readonly := true;
+    }
+    required single type: GameType {
+      readonly := true;
+      on source delete delete target;
+    }
+    required single ruleset: Ruleset {
+      readonly := true;
+      on source delete delete target;
+    }
+    required winner: str {
+      readonly := true;
+    }
+    required multi moves: Moves {
+      readonly := true;
+    }
+    required single snake: Snake {
+      readonly := true;
+      on source delete delete target;
+    }
+  }
+
+  type GameType {
+    required name: str {
+      readonly := true;
+    }
+    required is_ladder: bool {
+      readonly := true;
+    }
+  }
+
+  type Ruleset {
+    required name: str {
+      readonly := true;
+    }
+    required version: str {
+      readonly := true;
+    }
+    required settings: json {
+      readonly := true;
+    }
+  }
+
+  type Snake {
+    required type: str {
+      readonly := true;
+    }
+    calculations: array<json> {
+      readonly := true;
+    }
+  }
+
+  type Moves {
+    required turn: int32 {
+      readonly := true;
+    }
+    required snake_move: str {
+      readonly := true;
+    }
+    required game_board: json {
+      readonly := true;
+    }
+  }
+
+}