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islands_client_input
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Prompts and accepts a move in the Game of Islands.
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lib/islands/client/input/parser.ex
defmodule Islands.Client.Input.Parser do
use PersistConfig
alias Islands.Client.Input.Prompter
alias Islands.Client.{GameOver, Input, RandomGuess, State}
@coord_range 1..10
@island_type_codes ["a", "d", "l", "s", "q"]
@messages Application.get_env(@app, :messages)
@pause_range 0..10_000
@spec parse_input(Input.t(), State.t()) :: State.t() | no_return
def parse_input({:error, reason} = _input, state),
do: GameOver.end_game(["Game ended: #{inspect(reason)}"], state)
def parse_input(:eof = input, state),
do: GameOver.end_game(["Game ended: #{inspect(input)}"], state)
def parse_input(input, %State{} = state) do
input
|> String.split()
|> case do
[code, row, col] when code in @island_type_codes ->
with {row, ""} when row in @coord_range <- Integer.parse(row),
{col, ""} when col in @coord_range <- Integer.parse(col) do
put_in(state.move, [code, row, col])
else
_ -> Prompter.accept_move(state, @messages.bad_move)
end
["auto", pause] ->
with {pause, ""} when pause in @pause_range <- Integer.parse(pause) do
%State{state | mode: :auto, pause: pause}
|> Prompter.accept_move(@messages.auto_mode)
else
_ -> Prompter.accept_move(state, @messages.bad_move)
end
[row, col] ->
with {row, ""} when row in @coord_range <- Integer.parse(row),
{col, ""} when col in @coord_range <- Integer.parse(col) do
put_in(state.move, [row, col])
else
_ -> Prompter.accept_move(state, @messages.bad_move)
end
[] ->
parse_input(RandomGuess.new(state), state)
[move] when move in ["all", "set", "stop"] ->
put_in(state.move, [move])
["help"] ->
Prompter.accept_move(state, @messages.help)
_other ->
Prompter.accept_move(state, @messages.bad_move)
end
end
end