func BackupRule(state dip.State, deps []dip.Province) (err error) {
only_moves := true
convoys := false
for _, prov := range deps {
if order, _, ok := state.Order(prov); ok {
if order.Type() != cla.Move {
only_moves = false
}
if order.Type() == cla.Convoy {
convoys = true
}
}
}
if only_moves {
for _, prov := range deps {
state.SetResolution(prov, nil)
}
return
}
if convoys {
for _, prov := range deps {
if order, _, ok := state.Order(prov); ok && order.Type() == cla.Convoy {
state.SetResolution(prov, cla.ErrConvoyParadox)
}
}
return
}
err = fmt.Errorf("Unknown circular dependency between %v", deps)
return
}
func (self *move) Execute(state dip.State) {
if state.Phase().Type() == cla.Retreat {
state.Retreat(self.targets[0], self.targets[1])
} else {
state.Move(self.targets[0], self.targets[1], !cla.MustConvoy(state, self.targets[0]))
}
}
func (self *disband) Execute(state dip.State) {
if state.Phase().Type() == cla.Adjustment {
state.RemoveUnit(self.targets[0])
} else {
state.RemoveDislodged(self.targets[0])
}
}
func (self *phase) sortedUnits(s dip.State, n dip.Nation) (result []dip.Province, err error) {
provs := remoteUnitSlice{
distances: make(map[dip.Province]int),
units: make(map[dip.Province]dip.Unit),
}
provs.provinces, _, _ = s.Find(func(p dip.Province, o dip.Order, u *dip.Unit) bool {
if u != nil && u.Nation == n {
if provs.distances[p], err = self.shortestDistance(s, p, s.Graph().SCs(n)); err != nil {
return false
}
provs.units[p] = *u
return true
}
return false
})
if err != nil {
return
}
sort.Sort(provs)
dip.Logf("Sorted units for %v is %v", n, provs)
result = provs.provinces
return
}
func (self *phase) shortestDistance(s dip.State, src dip.Province, dst []dip.Province) (result int, err error) {
var unit dip.Unit
var ok bool
unit, src, ok = s.Unit(src)
if !ok {
err = fmt.Errorf("No unit at %v", src)
return
}
var filter dip.PathFilter
found := false
for _, destination := range dst {
if unit.Type == cla.Fleet {
filter = func(p dip.Province, edgeFlags, nodeFlags map[dip.Flag]bool, sc *dip.Nation) bool {
return edgeFlags[cla.Sea] && nodeFlags[cla.Sea]
}
} else {
filter = func(p dip.Province, edgeFlags, nodeFlags map[dip.Flag]bool, sc *dip.Nation) bool {
if p.Super() == destination.Super() {
return true
}
u, _, ok := s.Unit(p)
return (edgeFlags[cla.Land] && nodeFlags[cla.Land]) || (ok && !nodeFlags[cla.Land] && u.Nation == unit.Nation && u.Type == cla.Fleet)
}
}
for _, coast := range s.Graph().Coasts(destination) {
for _, srcCoast := range s.Graph().Coasts(src) {
if srcCoast == destination {
result = 0
found = true
} else {
if path := s.Graph().Path(srcCoast, coast, filter); path != nil {
if !found || len(path) < result {
result = len(path)
found = true
}
}
if path := s.Graph().Path(srcCoast, coast, nil); path != nil {
if !found || len(path) < result {
result = len(path)
found = true
}
}
}
}
}
}
return
}
func (self *phase) PostProcess(s dip.State) (err error) {
if self.typ == cla.Retreat {
for prov, _ := range s.Dislodgeds() {
s.RemoveDislodged(prov)
s.SetResolution(prov, cla.ErrForcedDisband)
}
s.ClearDislodgers()
s.ClearBounces()
if self.season == cla.Fall {
s.Find(func(p dip.Province, o dip.Order, u *dip.Unit) bool {
if u != nil {
if s.Graph().SC(p) != nil {
s.SetSC(p.Super(), u.Nation)
}
}
return false
})
}
} else if self.typ == cla.Adjustment {
for _, nationality := range cla.Nations {
_, _, balance := cla.AdjustmentStatus(s, nationality)
if balance < 0 {
var su []dip.Province
if su, err = self.sortedUnits(s, nationality); err != nil {
return
}
su = su[:-balance]
for _, prov := range su {
dip.Logf("Removing %v due to forced disband", prov)
s.RemoveUnit(prov)
s.SetResolution(prov, cla.ErrForcedDisband)
}
}
}
} else if self.typ == cla.Movement {
for prov, unit := range s.Dislodgeds() {
hasRetreat := false
for edge, _ := range s.Graph().Edges(prov) {
if _, _, ok := s.Unit(edge); !ok && !s.Bounce(prov, edge) {
if cla.HasEdge(s, unit.Type, prov, edge) {
dip.Logf("%v can retreat to %v", prov, edge)
hasRetreat = true
break
}
}
}
if !hasRetreat {
s.RemoveDislodged(prov)
dip.Logf("Removing %v since it has no retreat", prov)
}
}
}
return
}