Add in enum values for player, game state, grid cell state (#2)

src/module/util.js

@@ -1,5 +1,53 @@
-
+/**
+ * Enum of all possible states of a grid cell.
+ * @type {object}
+ */
 export const GridCellState = {
+    // Empty cell, default state
     Available: 'available',
+
+    // Disabled. Ship cannot be placed here.
     Disabled: 'disabled',
+
+    // There is a ship in this cell.
+    Ship: 'ship',
+
+    // This cell contains part of a ship which was damaged but not sunk
+    Damaged: 'damaged',
+
+    // This cell contains part of a ship which was sunk
+    Sunk: 'sunk',
+
+    // This cell was targeted, but nothing was hit
+    Missed: 'missed',
+}
+
+/**
+ * Enum of all possible players.
+ * @type {object}
+ */
+export const Player = {
+    One: 'player_one',
+    Two: 'player_two',
+}
+
+/**
+ * Enum of all possible game states. These are player-agnostic.
+ * @type {object}
+ */
+export const GameState = {
+    // Both players are choosing the number of ships to play with (1-5)
+    ChoosingNumberOfShips: 'choosing_number_of_ships',
+
+    // A player is placing their ships
+    PlayerSetup: 'player_setup',
+
+    // We are prompting to change to the other player
+    PromptPlayerChange: 'prompt_player_change',
+
+    // It is the player's turn to fire a missle at their opponent
+    PlayerTurn: 'player_turn',
+
+    // A player has won
+    PlayerVictory: 'player_victory',
 }