106 lines
1.9 KiB
Go
106 lines
1.9 KiB
Go
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package dice
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import (
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"fmt"
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"math/rand"
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"regexp"
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"sort"
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"strconv"
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)
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type StdRoller struct{}
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var stdPattern = regexp.MustCompile(`([0-9]+)d([0-9]+)((k|d|kh|dl|kl|dh)([0-9]+))?([+-][0-9]+)?($|\s)`)
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func (StdRoller) Pattern() *regexp.Regexp { return stdPattern }
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type StdResult struct {
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basicRollResult
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Rolls []int
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Dropped []int
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Total int
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}
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func (r StdResult) String() string {
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return fmt.Sprintf("%d %v (%v)", r.Total, r.Rolls, r.Dropped)
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}
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func (r StdResult) Int() int {
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return r.Total
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}
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func (StdRoller) Roll(matches []string) (RollResult, error) {
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dice, err := strconv.ParseInt(matches[1], 10, 0)
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if err != nil {
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return nil, err
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}
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sides, err := strconv.ParseInt(matches[2], 10, 0)
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if err != nil {
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return nil, err
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}
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keep := ""
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num := 0
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if matches[4] != "" {
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number, err := strconv.ParseInt(matches[5], 10, 0)
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if err != nil {
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return nil, err
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}
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num = int(number)
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keep = matches[4]
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}
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result := StdResult{
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basicRollResult: basicRollResult{matches[0]},
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Rolls: make([]int, dice),
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Dropped: nil,
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Total: 0,
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}
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if matches[6] != "" {
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bonus, err := strconv.ParseInt(matches[6], 10, 0)
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if err != nil {
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return nil, err
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}
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result.Total += int(bonus)
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}
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for i := 0; i < len(result.Rolls); i++ {
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roll := rand.Intn(int(sides)) + 1
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result.Rolls[i] = roll
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}
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sort.Ints(result.Rolls)
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size := len(result.Rolls)
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switch keep {
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case "k":
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fallthrough
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case "kh":
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result.Dropped = result.Rolls[:size-num]
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result.Rolls = result.Rolls[size-num:]
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case "d":
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fallthrough
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case "dl":
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result.Dropped = result.Rolls[:num]
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result.Rolls = result.Rolls[num:]
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case "kl":
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result.Dropped = result.Rolls[num:]
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result.Rolls = result.Rolls[:num]
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case "dh":
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result.Dropped = result.Rolls[size-num:]
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result.Rolls = result.Rolls[:size-num]
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}
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for i := 0; i < len(result.Rolls); i++ {
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result.Total += result.Rolls[i]
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}
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return result, nil
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}
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func init() {
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addRollHandler(StdRoller{})
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}
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