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package game
import (
"fmt"
"strconv"
"strings"
"thehouseoficarus/internal/net"
"thehouseoficarus/internal/player"
"thehouseoficarus/internal/world"
)
func (g *Game) executeWalk(sess *net.Session, args []string, rawInput string) {
g.doWalk(sess, args)
}
func (g *Game) doWalk(sess *net.Session, args []string) {
p := sess.Player
if len(args) == 0 {
sess.WriteLine("Walk where?")
return
}
input := strings.Join(args, "")
if roomID, err := strconv.Atoi(input); err == nil {
path := g.findPathToRoom(p.RoomID, roomID)
if path == nil {
sess.WriteLine(fmt.Sprintf("No path found to room #%d.", roomID))
return
}
g.startWalk(sess, p, path)
return
}
dirs, err := parseWalkDirections(input)
if err != nil {
sess.WriteLine(err.Error())
return
}
g.startWalk(sess, p, dirs)
}
func parseWalkDirections(input string) ([]string, error) {
var dirs []string
i := 0
for i < len(input) {
num := 0
for i < len(input) && input[i] >= '0' && input[i] <= '9' {
num = num*10 + int(input[i]-'0')
i++
}
if num == 0 {
num = 1
}
if i >= len(input) {
return nil, fmt.Errorf("Unexpected end of directions.")
}
ch := input[i]
i++
var dir string
switch ch {
case 'n':
dir = string(world.North)
case 's':
dir = string(world.South)
case 'e':
dir = string(world.East)
case 'w':
dir = string(world.West)
case 'u':
dir = string(world.Up)
case 'd':
dir = string(world.Down)
default:
return nil, fmt.Errorf("Unknown direction: %c", ch)
}
for j := 0; j < num; j++ {
dirs = append(dirs, dir)
}
}
return dirs, nil
}
func (g *Game) startWalk(sess *net.Session, p *player.Player, dirs []string) {
agilityLevel := p.Level(player.Agility)
if agilityLevel < 1 {
agilityLevel = 1
}
if len(dirs) > agilityLevel {
sess.WriteLine(fmt.Sprintf("You can only make %d moves at once with your current agility level!", agilityLevel))
return
}
g.cancelAction(p)
p.WalkSequence = dirs
}
func (g *Game) advanceWalk(sess *net.Session, p *player.Player) {
if p.MoveTicks > 0 {
return
}
if len(p.WalkSequence) == 0 {
return
}
dir := p.WalkSequence[0]
remaining := condensePath(p.WalkSequence[1:])
p.WalkSequence = p.WalkSequence[1:]
oldRoom := p.RoomID
g.doMove(sess, dir, 2.0)
if p.MoveTicks == 0 && p.RoomID == oldRoom {
p.WalkSequence = nil
p.ActionState = nil
return
}
if len(p.WalkSequence) > 0 && remaining != "" {
p.ActionState = &ActionState{Type: ActionWalking}
sess.WriteLine(fmt.Sprintf("You're headed: %s.", remaining))
}
}
func condensePath(dirs []string) string {
if len(dirs) == 0 {
return ""
}
var result strings.Builder
i := 0
for i < len(dirs) {
count := 1
for i+count < len(dirs) && dirs[i+count] == dirs[i] {
count++
}
if count > 1 {
result.WriteString(fmt.Sprintf("%d", count))
}
result.WriteString(directionToChar(dirs[i]))
i += count
}
return result.String()
}
func directionToChar(dir string) string {
switch world.ExitDir(dir) {
case world.North:
return "n"
case world.South:
return "s"
case world.East:
return "e"
case world.West:
return "w"
case world.Up:
return "u"
case world.Down:
return "d"
}
return "?"
}
var bfsSearchDirs = []world.ExitDir{world.North, world.South, world.East, world.West, world.Up, world.Down}
func (g *Game) findPathToRoom(fromRoom, toRoom int) []string {
if fromRoom == toRoom {
return nil
}
type bfsNode struct {
roomID int
path []string
}
visited := make(map[int]bool)
queue := []bfsNode{{fromRoom, nil}}
visited[fromRoom] = true
for len(queue) > 0 {
cur := queue[0]
queue = queue[1:]
room, ok := loadRoom(g, cur.roomID)
if !ok {
continue
}
for _, dir := range bfsSearchDirs {
exitDef, exists := room.Exits[dir]
if !exists {
continue
}
if visited[exitDef.Room] {
continue
}
newPath := make([]string, len(cur.path)+1)
copy(newPath, cur.path)
newPath[len(cur.path)] = string(dir)
if exitDef.Room == toRoom {
return newPath
}
visited[exitDef.Room] = true
queue = append(queue, bfsNode{exitDef.Room, newPath})
}
}
return nil
}
|
