feat: support controller's cache

internal/controller/cache.go

@@ -0,0 +1,194 @@
+package controller
+
+import (
+	"fmt"
+	"iter"
+	"slices"
+
+	"github.com/google/uuid"
+	"github.com/iliadenisov/galaxy/internal/model/game"
+)
+
+type Cache struct {
+	g                         *game.Game
+	cacheRaceIndexByID        map[uuid.UUID]int
+	raceIndexByShipGroupIndex map[int]int
+	shipClassByShipGroupIndex map[int]*game.ShipType
+	planetByPlanetNumber      map[uint]*game.Planet
+	cacheRelation             map[int]map[int]game.Relation
+}
+
+func NewCache(g *game.Game) *Cache {
+	if g == nil {
+		panic("NewCache: nil Game passed")
+	}
+	c := &Cache{
+		g: g,
+	}
+	return c
+}
+
+func (c *Cache) Relation(r1, r2 int) game.Relation {
+	if c.cacheRelation == nil {
+		for r1 := range c.g.Race {
+			for r2 := range c.g.Race {
+				if r1 == r2 {
+					continue
+				}
+				rel := slices.IndexFunc(c.g.Race[r1].Relations, func(r game.RaceRelation) bool { return r.RaceID == c.g.Race[r2].ID })
+				if rel < 0 {
+					panic(fmt.Sprintf("Relation: opponent not found idx=%d", r2))
+				}
+				if _, ok := c.cacheRelation[r1]; !ok {
+					c.cacheRelation[r1] = make(map[int]game.Relation)
+				}
+				c.cacheRelation[r1][r2] = c.g.Race[r1].Relations[rel].Relation
+			}
+		}
+
+	}
+	if _, ok := c.cacheRelation[r1]; !ok {
+		panic(fmt.Sprintf("Relation: no left race idx=%d", r1))
+	}
+	if v, ok := c.cacheRelation[r1][r2]; !ok {
+		panic(fmt.Sprintf("Relation: no right race idx=%d", r2))
+	} else {
+		return v
+	}
+}
+
+func (c *Cache) Planet(planetNumber uint) *game.Planet {
+	if c.planetByPlanetNumber == nil {
+		c.planetByPlanetNumber = make(map[uint]*game.Planet)
+		for p := range c.g.Map.Planet {
+			c.planetByPlanetNumber[c.g.Map.Planet[p].Number] = &c.g.Map.Planet[p]
+		}
+	}
+	if v, ok := c.planetByPlanetNumber[planetNumber]; ok {
+		return v
+	} else {
+		panic(fmt.Sprintf("Planet: not found by number=%d", planetNumber))
+	}
+}
+
+func (c *Cache) ShipGroupShipClass(groupIndex int) *game.ShipType {
+	if c.shipClassByShipGroupIndex == nil {
+		c.fillShipsAndGroups()
+	}
+	c.validateShipGroupIndex(groupIndex)
+	if v, ok := c.shipClassByShipGroupIndex[groupIndex]; ok {
+		return v
+	} else {
+		panic(fmt.Sprintf("ShipClassByShipGroupIndex: group not found by index=%v", groupIndex))
+	}
+}
+
+func (c *Cache) RaceIndex(ID uuid.UUID) int {
+	if c.cacheRaceIndexByID == nil {
+		c.cacheRaceIndexByID = make(map[uuid.UUID]int)
+		for i := range c.g.Race {
+			c.cacheRaceIndexByID[c.g.Race[i].ID] = i
+		}
+	}
+	if v, ok := c.cacheRaceIndexByID[ID]; ok {
+		return v
+	} else {
+		panic(fmt.Sprintf("RaceIndex: race not found by ID=%v", ID))
+	}
+}
+
+// ShipGroup is a proxy func, nothing to cache
+func (c *Cache) ShipGroup(groupIndex int) *game.ShipGroup {
+	c.validateShipGroupIndex(groupIndex)
+	return &c.g.ShipGroups[groupIndex]
+}
+
+func (c *Cache) ShipGroupsIndex() iter.Seq[int] {
+	return func(yield func(int) bool) {
+		for i := range c.g.ShipGroups {
+			if !yield(i) {
+				return
+			}
+		}
+	}
+}
+
+func (c *Cache) ShipGroupOwnerRaceIndex(groupIndex int) int {
+	if c.raceIndexByShipGroupIndex == nil {
+		c.fillShipsAndGroups()
+	}
+	c.validateShipGroupIndex(groupIndex)
+	if v, ok := c.raceIndexByShipGroupIndex[groupIndex]; ok {
+		return v
+	} else {
+		panic(fmt.Sprintf("ShipGroupRace: group not found by index=%v", groupIndex))
+	}
+}
+
+func (c *Cache) ShipGroupOwnerRace(groupIndex int) *game.Race {
+	return &c.g.Race[c.ShipGroupOwnerRaceIndex(groupIndex)]
+}
+
+func (c *Cache) ShipGroupNumber(i int, n uint) {
+	c.validateShipGroupIndex(i)
+	c.g.ShipGroups[i].Number = n
+}
+
+func (c *Cache) DeleteShipGroup(i int) {
+	c.validateShipGroupIndex(i)
+	c.unsafeDeleteShipGroup(i)
+}
+
+func (c *Cache) DeleteKilledShipGroups() {
+	for i := len(c.g.ShipGroups) - 1; i >= 0; i-- {
+		if c.g.ShipGroups[i].Number == 0 {
+			c.unsafeDeleteShipGroup(i)
+		}
+	}
+}
+
+func (c *Cache) unsafeDeleteShipGroup(i int) {
+	c.g.ShipGroups = append(c.g.ShipGroups[:i], c.g.ShipGroups[i+1:]...)
+	delete(c.raceIndexByShipGroupIndex, i)
+	delete(c.shipClassByShipGroupIndex, i)
+}
+
+// Internal
+
+func (c *Cache) validateShipGroupIndex(i int) {
+	if i >= len(c.g.ShipGroups) {
+		panic(fmt.Sprintf("group index out of groups len: %d >= %d", i, len(c.g.ShipGroups)))
+	}
+}
+
+func (c *Cache) fillShipsAndGroups() {
+	if c.raceIndexByShipGroupIndex != nil {
+		clear(c.raceIndexByShipGroupIndex)
+	} else {
+		c.raceIndexByShipGroupIndex = make(map[int]int)
+	}
+	if c.shipClassByShipGroupIndex != nil {
+		clear(c.shipClassByShipGroupIndex)
+	} else {
+		c.shipClassByShipGroupIndex = make(map[int]*game.ShipType)
+	}
+	for groupIndex := range c.g.ShipGroups {
+		ri := c.RaceIndex(c.g.ShipGroups[groupIndex].OwnerID)
+		c.raceIndexByShipGroupIndex[groupIndex] = ri
+		sti, ok := ShipClassIndex(c.g, ri, c.g.ShipGroups[groupIndex].TypeID)
+		if !ok {
+			panic(fmt.Sprintf("CollectPlanetGroups: ship class not found for race=%q group=%v", c.g.Race[ri].Name, c.g.ShipGroups[groupIndex].Index))
+		}
+		c.shipClassByShipGroupIndex[groupIndex] = &c.g.Race[ri].ShipTypes[sti]
+	}
+}
+
+// Helpers
+
+func ShipClassIndex(g *game.Game, ri int, classID uuid.UUID) (int, bool) {
+	if len(g.Race) < ri+1 {
+		panic(fmt.Sprintf("ShipClass: game race index %d invalid: len=%d", ri, len(g.Race)))
+	}
+	sti := slices.IndexFunc(g.Race[ri].ShipTypes, func(st game.ShipType) bool { return st.ID == classID })
+	return sti, sti >= 0
+}