items

engine/items/ammo.go

@@ -9,6 +9,6 @@ type Ammo struct {
 	itemprops.DamageProfile
 }
 
-func (a *Ammo) Type() string {
+func (a Ammo) Type() string {
 	return ecs.AmmoComponent
 }

engine/items/armor.go

@@ -6,6 +6,6 @@ type Armor struct {
 	DefenceProfile struct{}
 }
 
-func (a *Armor) Type() string {
+func (a Armor) Type() string {
 	return ecs.ArmorComponent
 }

engine/items/backpack.go

@@ -0,0 +1,33 @@
+package items
+
+import "lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+
+type Backpack struct {
+	MaxNumber int
+	MaxBulk   int
+	MaxMass   int
+	items     []ecs.Entity
+}
+
+func (b Backpack) Type() string {
+	return ecs.BackpackComponent
+}
+
+func (b *Backpack) HasFreeSpace(Bulk, Mass int) bool {
+	totalBulk, totalMass := 0, 0
+	for i, _ := range  b.items {
+		tmp := Controller.GetComponent(b.items[i], Carried{}.Type()).(Carried)
+		carried := tmp
+		totalBulk += carried.Bulk
+		totalMass += carried.Mass
+	}
+	if totalMass >= b.MaxMass {
+		//fixme return message along - 'too heavy'
+		return false
+	}
+	if totalBulk >= b.MaxMass {
+		//fixme return message along - 'doesnt fit to your backpack'
+		return false
+	}
+	return true
+}

engine/items/carried.go

@@ -1,6 +1,9 @@
 package items
 
-import "lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+import (
+	"lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+	"lab.zaar.be/thefish/alchemyst-go/engine/types"
+)
 
 type CarriedFace interface {
 	Drop()
@@ -12,16 +15,74 @@ type Carried struct {
 	Bulk int //внешний размер, см3
 }
 
-func (c *Carried) Type() string {
+func (c Carried) Type() string {
 	return ecs.CarriedComponent
 }
 
-func (c *Carried) Pickup() {}
-func (c *Carried) Drop() {}
+func (c Carried) Pickup(who, what ecs.Entity) {
+	// check if im lying on ground
+	if !Controller.HasComponent(what, ecs.CoordsComponent) {
+		return
+	}
+	// something inexistent on map trying to pickup an item?!
+	if !Controller.HasComponent(who, ecs.CoordsComponent) {
+		//todo log error - investigate this situation
+		return
+	}
+	//check if who and what are on the same tile
+	whoCoords := Controller.GetComponent(who, ecs.CoordsComponent).(types.Coords)
+	whatCoords := Controller.GetComponent(what, ecs.CoordsComponent).(types.Coords)
+	if whoCoords != whatCoords {
+		//todo log error - something strange happened
+		return
+	}
+	//does not have inventory?
+	if !Controller.HasComponent(who, ecs.BackpackComponent) {
+		//todo send message - you cant carry items
+		return
+	}
+	bp := Controller.GetComponent(who, Backpack{}.Type()).(Backpack)
+	if !bp.HasFreeSpace(c.Bulk, c.Mass) {
+		//todo send message - does not fit to your inventory
+		return
+	}
+	//do not remove appearance
+	//remove coords instead (does not exist on map anymore)
+	Controller.RemoveComponent(what, ecs.CoordsComponent)
+	bp.items = append(bp.items, what)
+}
 
-func (c *Carried) GetMass() int {
+func (c Carried) Drop(who, what ecs.Entity) {
+	var coords types.Coords
+	// something inexistent on map trying to drop an item?!
+	if !Controller.HasComponent(who, ecs.CoordsComponent) {
+		//todo log error - investigate this situation
+		return
+	} else {
+		coords = Controller.GetComponent(who, types.Coords{}.Type()).(types.Coords)
+	}
+	//does not have inventory?
+	if !Controller.HasComponent(who, ecs.BackpackComponent) {
+		//todo send message - you cant carry items
+		return
+	}
+
+	bp := Controller.GetComponent(who, Backpack{}.Type()).(Backpack)
+	var dropped ecs.Entity
+	bp.items, dropped = ecs.DeleteFromEntitySlice(bp.items, what)
+	if dropped != what {
+		//todo log error - something strange happened
+		return
+	}
+	//Give dropped back coordinated
+	Controller.AddComponent(dropped, coords)
+	//Controller.UpdateComponent(what, coords.Type(), coords) //even we need that?
+	Controller.UpdateComponent(who, bp.Type(), bp)
+}
+
+func (c Carried) GetMass(what ecs.Entity) int {
 	return c.Mass
 }
-func (c *Carried) GetBulk() int {
+func (c *Carried) GetBulk(what ecs.Entity) int {
 	return c.Bulk
 }

engine/items/common.go

@@ -0,0 +1,9 @@
+package items
+
+import "lab.zaar.be/thefish/alchemyst-go/engine/ecs"
+
+var Controller ecs.Controller
+
+func Init(ctrl ecs.Controller) {
+	Controller = ctrl
+}

engine/items/ranged.go

@@ -6,6 +6,6 @@ type Ranged struct {
 	RangeProfile struct{} //это зависимость дальности-скорости от характеристик и атрибутов
 }
 
-func (r *Ranged) Type() string {
+func (r Ranged) Type() string {
 	return ecs.RangedComponent
 }

engine/items/useable.go

@@ -9,7 +9,7 @@ type UsableFace interface {
 type Usable struct {}
 
 
-func (u *Usable) Type() string {
+func (u Usable) Type() string {
 	return ecs.UsableComponent
 }
 

engine/items/wearable.go

@@ -11,6 +11,6 @@ type Wearable struct {
 	Bodypart int //куда собстно одевать
 }
 
-func (w *Wearable) Type() string {
+func (w Wearable) Type() string {
 	return ecs.WearableComponent
 }