Move WissKI Parts to new ingredients system

internal/wisski/ingredient/ingredient.go

@@ -0,0 +1,48 @@
+package ingredient
+
+import (
+	"reflect"
+	"strings"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/wisski/liquid"
+)
+
+// Ingredients represent a part of a WissKI instance.
+// An Ingredient should be implemented as a pointer to a struct.
+// Every ingredient must embed [Base] and should be initialized using [Init] inside a [lazy.Pool].
+//
+// By convention these are defined within their corresponding subpackage.
+// This subpackage also contains all required resources.
+type Ingredient interface {
+	// Name returns the name of this ingredient
+	// Name should be implemented by the [Base] struct.
+	Name() string
+
+	// getBase returns the underlying Base object of this Ingredient.
+	// It is used internally during initialization
+	getBase() *Base
+}
+
+// Base is embedded into every Ingredient
+type Base struct {
+	name           string // name is the name of this ingredient
+	*liquid.Liquid        // the underlying liquid
+}
+
+//lint:ignore U1000 used to implement the private methods of [Component]
+func (cb *Base) getBase() *Base {
+	return cb
+}
+
+// Init initializes a new Ingredient.
+// Init is only intended to be used within a lazy.Pool[Ingredient,*Liquid].
+func Init(ingredient Ingredient, liquid *liquid.Liquid) Ingredient {
+	base := ingredient.getBase() // pointer to a struct
+	base.Liquid = liquid
+	base.name = strings.ToLower(reflect.TypeOf(ingredient).Elem().Name())
+	return ingredient
+}
+
+func (cb Base) Name() string {
+	return cb.name
+}