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islands_engine
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Models the Game of Islands.
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lib/islands/engine.ex
# ┌────────────────────────────────────────────────────────────────────┐
# │ Based on the book "Functional Web Development" by Lance Halvorsen. │
# └────────────────────────────────────────────────────────────────────┘
defmodule Islands.Engine do
use PersistConfig
@book_ref Application.get_env(@app, :book_ref)
@moduledoc """
Models the Game of Islands.
\n##### #{@book_ref}
"""
alias Islands.Engine.Game.{Server, Sup, Tally}
alias Islands.Engine.{Coord, Game, Island}
@board_range Application.get_env(@app, :board_range)
@island_types Application.get_env(@app, :island_types)
@player_ids Application.get_env(@app, :player_ids)
@doc """
Starts a new game.
"""
@spec new_game(String.t(), pid) :: Supervisor.on_start_child()
def new_game(player1_name, player1_pid)
when is_binary(player1_name) and is_pid(player1_pid) do
DynamicSupervisor.start_child(Sup, {Server, {player1_name, player1_pid}})
end
@doc """
Ends a game.
"""
@spec end_game(String.t()) :: :ok
def end_game(player1_name) when is_binary(player1_name) do
player1_name |> Server.via() |> GenServer.stop(:shutdown)
end
@doc """
Stops a game.
"""
@spec stop_game(String.t(), Game.player_id()) :: Tally.t()
def stop_game(player1_name, player_id)
when is_binary(player1_name) and player_id in @player_ids do
player1_name |> Server.via() |> GenServer.call({:stop, player_id})
end
@doc """
Adds the second player of a game.
"""
@spec add_player(String.t(), String.t(), pid) :: Tally.t()
def add_player(player1_name, player2_name, player2_pid)
when is_binary(player1_name) and is_binary(player2_name) and
is_pid(player2_pid) do
player1_name
|> Server.via()
|> GenServer.call({:add_player, player2_name, player2_pid})
end
@doc """
Positions an island on a player's board.
"""
@spec position_island(
String.t(),
Game.player_id(),
Island.type(),
Coord.row(),
Coord.col()
) :: Tally.t()
def position_island(player1_name, player_id, island_type, row, col)
when is_binary(player1_name) and player_id in @player_ids and
island_type in @island_types and row in @board_range and
col in @board_range do
player1_name
|> Server.via()
|> GenServer.call({:position_island, player_id, island_type, row, col})
end
@doc """
Positions all islands on a player's board.
"""
@spec position_all_islands(String.t(), Game.player_id()) :: Tally.t()
def position_all_islands(player1_name, player_id)
when is_binary(player1_name) and player_id in @player_ids do
player1_name
|> Server.via()
|> GenServer.call({:position_all_islands, player_id})
end
@doc """
Declares all islands set for a player.
"""
@spec set_islands(String.t(), Game.player_id()) :: Tally.t()
def set_islands(player1_name, player_id)
when is_binary(player1_name) and player_id in @player_ids do
player1_name |> Server.via() |> GenServer.call({:set_islands, player_id})
end
@doc """
Allows a player to guess a coordinate.
"""
@spec guess_coord(String.t(), Game.player_id(), Coord.row(), Coord.col()) ::
Tally.t()
def guess_coord(player1_name, player_id, row, col)
when is_binary(player1_name) and player_id in @player_ids and
row in @board_range and col in @board_range do
player1_name
|> Server.via()
|> GenServer.call({:guess_coord, player_id, row, col})
end
@doc """
Returns the tally of a game for a given player.
"""
@spec tally(String.t(), Game.player_id()) :: Tally.t()
def tally(player1_name, player_id)
when is_binary(player1_name) and player_id in @player_ids do
player1_name |> Server.via() |> GenServer.call({:tally, player_id})
end
end