62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
package draft // import "git.fromouter.space/mcg/draft"
|
|
|
|
import "math/rand"
|
|
|
|
// Pack is a collection of cards from a booster pack
|
|
type Pack []Card
|
|
|
|
// Card is a single card
|
|
type Card struct {
|
|
ID string
|
|
}
|
|
|
|
// CardProvider is a function that returns as many cards of a certain types as needed
|
|
type CardProvider func(int) []Card
|
|
|
|
// PackSchema is all that's needed to generate a certain type of pack
|
|
type PackSchema struct {
|
|
Slots []PackSlot
|
|
}
|
|
|
|
// PackSlot is part of how packs are made, one or more providers provide
|
|
// cards for X cards of the whole pack
|
|
type PackSlot struct {
|
|
Amount int
|
|
Provider CardProvider
|
|
Alternate []AlternateProvider
|
|
}
|
|
|
|
// AlternateProvider are Card providers that can replace one or more slots
|
|
// with special cards (foils, ultra rares)
|
|
type AlternateProvider struct {
|
|
Probability float32
|
|
Provider CardProvider
|
|
}
|
|
|
|
// MakePack makes a booster pack from a given set
|
|
func MakePack(set Set) Pack {
|
|
schema := set.PackSchema()
|
|
pack := make(Pack, 0)
|
|
for _, slot := range schema.Slots {
|
|
// Default provider
|
|
provider := slot.Provider
|
|
|
|
// Check for random alternates
|
|
if slot.Alternate != nil {
|
|
var currentProb float32
|
|
var chosenProb = rand.Float32()
|
|
for _, alt := range slot.Alternate {
|
|
currentProb += alt.Probability
|
|
if currentProb > chosenProb {
|
|
provider = alt.Provider
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
// Extract cards from provider and add them to the pack
|
|
cards := provider(slot.Amount)
|
|
pack = append(pack, cards...)
|
|
}
|
|
return pack
|
|
}
|