1 files changed, 63 insertions, 0 deletions
diff --git a/entity.go b/entity.go
index 185efdb..e111f06 100644
--- a/entity.go
+++ b/entity.go
@@ -3,6 +3,7 @@ package main
 import (
 	"age_of_empires/ecs"
 	"age_of_empires/physics"
+	"image/color"
 
 	"github.com/hajimehoshi/ebiten/v2"
 )
@@ -25,3 +26,65 @@ func (e Entity) Bounds() physics.Rectangle {
 		Max: e.Position.Value.Add(e.Image.Value.Bounds().Size()),
 	}
 }
+
+type EntityBuilder Entity
+
+func (b EntityBuilder) WithPosition(position physics.Point) EntityBuilder {
+	b.Position = ecs.C(position)
+	return b
+}
+
+func (b EntityBuilder) WithImage(image *ebiten.Image) EntityBuilder {
+	b.Image = ecs.C(image)
+	return b
+}
+
+var red = color.RGBA{0xff, 0x00, 0x00, 0xff}
+
+func (b EntityBuilder) WithSelection(haloKind string) EntityBuilder {
+	b.Selection = ecs.C(Selection{
+		IsSelected: false,
+		Halo:       nil,
+	})
+	switch haloKind {
+	case "round":
+		b.Selection.Value.Halo = NewStrokeCircleImage(110, SELECTION_HALO_WIDTH, red)
+	case "square":
+		b.Selection.Value.Halo = NewStrokeRectangleImage(physics.Point{X: 110, Y: 110}, SELECTION_HALO_WIDTH, red)
+	}
+	return b
+}
+
+func (b EntityBuilder) WithResourceStorage() EntityBuilder {
+	b.ResourceStorage = ecs.C(ResourceStorage{})
+	return b
+}
+
+func (b EntityBuilder) WithResourceSource(amount int) EntityBuilder {
+	b.ResourceSource = ecs.C(ResourceSource{Remaining: amount})
+	return b
+}
+
+func (b EntityBuilder) WithSpawn(spawn Spawn) EntityBuilder {
+	b.Spawn = ecs.C(spawn)
+	return b
+}
+
+func (b EntityBuilder) WithMove() EntityBuilder {
+	b.Move = ecs.C(physics.Move{IsActive: false})
+	return b
+}
+
+func (b EntityBuilder) WithOrder() EntityBuilder {
+	b.Order.IsEnabled = true
+	return b
+}
+
+func (b EntityBuilder) WithResourceGatherer(maxCapacity int) EntityBuilder {
+	b.ResourceGatherer = ecs.C(ResourceGatherer{MaxCapacity: maxCapacity})
+	return b
+}
+
+func (b EntityBuilder) Build() Entity {
+	return Entity(b)
+}