Battlesnake/Byte-snake-engine
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DEV-765 pipeline refactor (#64)

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Refactor rulesets into smaller composable operations

In order to mix up the functionality from different rulesets like Solo, Royale, etc. the code in these classes needs to be broken up into small functions that can be composed in a pipeline to make a custom game mode.
This commit is contained in:
Torben 2022-03-16 16:58:05 -07:00 • committed by GitHub
parent 5e629e9e93
commit 397d925110
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GPG key ID: 4AEE18F83AFDEB23
25 changed files with 1475 additions and 222 deletions
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42
royale.go
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@ -13,7 +13,7 @@ type RoyaleRuleset struct {
ShrinkEveryNTurns int32
}
func (r *RoyaleRuleset) Name() string { return "royale" }
func (r *RoyaleRuleset) Name() string { return GameTypeRoyale }
func (r *RoyaleRuleset) CreateNextBoardState(prevState *BoardState, moves []SnakeMove) (*BoardState, error) {
if r.StandardRuleset.HazardDamagePerTurn < 1 {
@ -26,7 +26,7 @@ func (r *RoyaleRuleset) CreateNextBoardState(prevState *BoardState, moves []Snak
}
// Royale's only job is now to populate the hazards for next turn - StandardRuleset takes care of applying hazard damage.
err = r.populateHazards(nextBoardState, prevState.Turn+1)
err = r.populateHazards(nextBoardState)
if err != nil {
return nil, err
}
@ -34,20 +34,28 @@ func (r *RoyaleRuleset) CreateNextBoardState(prevState *BoardState, moves []Snak
return nextBoardState, nil
}
func (r *RoyaleRuleset) populateHazards(b *BoardState, turn int32) error {
func (r *RoyaleRuleset) populateHazards(b *BoardState) error {
_, err := r.callStageFunc(PopulateHazardsRoyale, b, []SnakeMove{})
return err
}
func PopulateHazardsRoyale(b *BoardState, settings Settings, moves []SnakeMove) (bool, error) {
b.Hazards = []Point{}
if r.ShrinkEveryNTurns < 1 {
return errors.New("royale game can't shrink more frequently than every turn")
// Royale uses the current turn to generate hazards, not the previous turn that's in the board state
turn := b.Turn + 1
if settings.RoyaleSettings.ShrinkEveryNTurns < 1 {
return false, errors.New("royale game can't shrink more frequently than every turn")
}
if turn < r.ShrinkEveryNTurns {
return nil
if turn < settings.RoyaleSettings.ShrinkEveryNTurns {
return false, nil
}
randGenerator := rand.New(rand.NewSource(r.Seed))
randGenerator := rand.New(rand.NewSource(settings.RoyaleSettings.seed))
numShrinks := turn / r.ShrinkEveryNTurns
numShrinks := turn / settings.RoyaleSettings.ShrinkEveryNTurns
minX, maxX := int32(0), b.Width-1
minY, maxY := int32(0), b.Height-1
for i := int32(0); i < numShrinks; i++ {
@ -71,5 +79,19 @@ func (r *RoyaleRuleset) populateHazards(b *BoardState, turn int32) error {
}
}
return nil
return false, nil
}
func (r RoyaleRuleset) Settings() Settings {
s := r.StandardRuleset.Settings()
s.RoyaleSettings = RoyaleSettings{
seed: r.Seed,
ShrinkEveryNTurns: r.ShrinkEveryNTurns,
}
return s
}
// Adaptor for integrating stages into RoyaleRuleset
func (r *RoyaleRuleset) callStageFunc(stage StageFunc, boardState *BoardState, moves []SnakeMove) (bool, error) {
return stage(boardState, r.Settings(), moves)
}