66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
package rules
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type RulesetError string
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func (err RulesetError) Error() string { return string(err) }
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const (
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MoveUp = "up"
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MoveDown = "down"
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MoveRight = "right"
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MoveLeft = "left"
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BoardSizeSmall = 7
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BoardSizeMedium = 11
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BoardSizeLarge = 19
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SnakeMaxHealth = 100
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SnakeStartSize = 3
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// bvanvugt - TODO: Just return formatted strings instead of codes?
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NotEliminated = ""
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EliminatedByCollision = "snake-collision"
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EliminatedBySelfCollision = "snake-self-collision"
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EliminatedByOutOfHealth = "out-of-health"
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EliminatedByHeadToHeadCollision = "head-collision"
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EliminatedByOutOfBounds = "wall-collision"
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// TODO - Error consts
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ErrorTooManySnakes = RulesetError("too many snakes for fixed start positions")
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ErrorNoRoomForSnake = RulesetError("not enough space to place snake")
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ErrorNoRoomForFood = RulesetError("not enough space to place food")
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ErrorNoMoveFound = RulesetError("move not provided for snake")
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ErrorZeroLengthSnake = RulesetError("snake is length zero")
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)
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type Point struct {
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X int32
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Y int32
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}
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type Snake struct {
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ID string
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Body []Point
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Health int32
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EliminatedCause string
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EliminatedBy string
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}
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type BoardState struct {
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Height int32
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Width int32
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Food []Point
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Snakes []Snake
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}
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type SnakeMove struct {
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ID string
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Move string
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}
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type Ruleset interface {
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Name() string
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CreateInitialBoardState(width int32, height int32, snakeIDs []string) (*BoardState, error)
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CreateNextBoardState(prevState *BoardState, moves []SnakeMove) (*BoardState, error)
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IsGameOver(state *BoardState) (bool, error)
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}
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