Package start

4 files changed, 119 insertions, 1 deletions

diff --git a/engine/Components/Packages/Common.go b/engine/Components/Packages/Common.go
new file mode 100644
index 0000000..0564f08
--- /dev/null
+++ b/engine/Components/Packages/Common.go
@@ -0,0 +1,23 @@
+package packages
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+func ReadJSONfromFile(fileLocation string, v any) error {
+	var file, openErr = os.ReadFile(fileLocation)
+	if openErr != nil {
+		return openErr
+	}
+	var jsonErr = json.Unmarshal(file, v)
+	if jsonErr != nil {
+		return jsonErr
+	}
+	return nil
+}
+
+func ConcantinateFileLocation(baseDirLocation string, appendix string) string {
+	return fmt.Sprintf("%v/%v", baseDirLocation, appendix)
+}
diff --git a/engine/Components/Packages/Manager.go b/engine/Components/Packages/Manager.go
new file mode 100644
index 0000000..47b0476
--- /dev/null
+++ b/engine/Components/Packages/Manager.go
@@ -0,0 +1,43 @@
+package packages
+
+import (
+	"fmt"
+	"os"
+
+	settings "github.com/DegustatorPonos/RuinesOfRafdolon/Settings"
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+type PackageManager struct {
+	AvaliablePackages map[string]Package
+}
+
+var Manager *PackageManager = nil
+
+func LoadPackages() (*PackageManager, error) {
+	var dir, dirErr = os.ReadDir(settings.Current.PackagesLocation)
+	if dirErr != nil {
+		return nil, dirErr
+	}
+	var outp = PackageManager{
+		AvaliablePackages: make(map[string]Package),
+	}
+	for _, v := range dir {
+		var newPackage, packageErr = ReadPackage(v)
+		if packageErr != nil {
+			rl.TraceLog(rl.LogWarning, "Failed to load the module %v: %s", v.Name(), packageErr.Error())
+			continue
+		}
+		_ = newPackage
+		rl.TraceLog(rl.LogError, "Loaded the module %s", newPackage.Description.Name)
+	}
+	return &outp, nil
+}
+
+func Init() {
+	var manager, err = LoadPackages()
+	if err != nil {
+		panic(fmt.Sprintf("Failed to load packages: %v", err.Error()))
+	}
+	Manager = manager
+}
diff --git a/engine/Components/Packages/Package.go b/engine/Components/Packages/Package.go
new file mode 100644
index 0000000..51e2a80
--- /dev/null
+++ b/engine/Components/Packages/Package.go
@@ -0,0 +1,42 @@
+package packages
+
+import (
+	"fmt"
+	"os"
+
+	settings "github.com/DegustatorPonos/RuinesOfRafdolon/Settings"
+)
+
+type PackageDescription struct {
+	Name string `json:"name"`
+	Version uint64 `json:"version"`
+	Type string `json:"type"`
+}
+
+type Package struct {
+	Description PackageDescription `json:"description"`
+}
+
+func ReadPackage(dir os.DirEntry) (*Package, error) {
+	var dirPath = ConcantinateFileLocation(settings.Current.PackagesLocation, dir.Name())
+	var desc = PackageDescription{}
+	if descErr := ReadJSONfromFile(ConcantinateFileLocation(dirPath, "Description.json"), &desc); descErr != nil {
+		return nil, descErr
+	}
+	if descErr := desc.Validate(); descErr != nil {
+		return nil, fmt.Errorf("Failed to parse descriptor: %s", descErr.Error())
+	}
+	return &Package{
+		Description: desc,
+	}, nil
+}
+
+func (base *PackageDescription) Validate() error {
+	if base.Name == "" {
+		return fmt.Errorf("Invalid package descriptor: the name cannot be empty")
+	}
+	if base.Version == 0{
+		return fmt.Errorf("Invalid package descriptor: the version cannot be 0")
+	}
+	return nil
+}
diff --git a/engine/Components/World/Tile.go b/engine/Components/World/Tile.go
index 203d40d..a630062 100644
--- a/engine/Components/World/Tile.go
+++ b/engine/Components/World/Tile.go
@@ -23,9 +23,19 @@ func (base *StandardTile) Draw() {
 		int32(base.X) * int32(base.ParentWorld.TileSize.X),
 		int32(base.Y) * int32(base.ParentWorld.TileSize.Y),
 		rl.White)
-}
+	if base.Descriptor.OveralyTextureId != 0 {
+		var overlayTexture = base.ParentWorld.Textures[base.Descriptor.OveralyTextureId]
+		var dx = (base.ParentWorld.TileSize.X - float32(overlayTexture.Width)) / 2
+		var dy = (float32(overlayTexture.Height) - base.ParentWorld.TileSize.Y)
 
+		rl.DrawTexture(overlayTexture,
+			int32(base.X) * int32(base.ParentWorld.TileSize.X) + int32(dx), 
+			int32(base.Y) * int32(base.ParentWorld.TileSize.Y) - int32(dy),
+			rl.White)
+	}
+}
 
 type TileDescriptor struct {
 	TextureId int `json:"textureid"`
+	OveralyTextureId int `json:"overalytextureid"`
 }