feat: unifood base with GET dishes (#1)

Features:
- CLI structure with verbs and resources
- Application config and parameters
- Output formatters
- Initial resource: dishes

Reviewed-on: #1
Co-authored-by: bdoerfchen <git@bissendorf.co>
Co-committed-by: bdoerfchen <git@bissendorf.co>

core/handler/dishes/handler.go

@@ -0,0 +1,89 @@
+package dishes
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"git.bissendorf.co/bissendorf/unifood/m/v2/core/interfaces"
+	"git.bissendorf.co/bissendorf/unifood/m/v2/core/interfaces/params"
+	"git.bissendorf.co/bissendorf/unifood/m/v2/model/external/stwbremen"
+	"git.bissendorf.co/bissendorf/unifood/m/v2/model/resources"
+	"git.bissendorf.co/bissendorf/unifood/m/v2/util"
+)
+
+type DishesHandler struct {
+	interfaces.ResourceHandler
+	interfaces.GetHandler
+
+	QueryClient interfaces.QueryClient[[]stwbremen.Dish]
+}
+
+const (
+	paramDate     = "date"
+	paramLocation = "location"
+)
+
+func (h *DishesHandler) Get(ctx context.Context, params params.Container) (*interfaces.ResourceList, error) {
+	// Read parameters
+	p, err := params.GetValue(paramDate)
+	if err != nil {
+		return nil, fmt.Errorf("unable to parse date parameter: %w", err)
+	}
+	date := p.(time.Time)
+
+	location, err := params.GetValue(paramLocation)
+	if err != nil {
+		return nil, fmt.Errorf("unable to parse location parameter: %w", err)
+	}
+
+	// Build query
+	query := fmt.Sprintf(
+		`page('meals').children.filterBy('location', '%s').filterBy('date', '%s').filterBy('printonly', 0)`,
+		location,
+		date.Format(time.DateOnly),
+	)
+
+	// Run query
+	dishes, err := h.QueryClient.Get(ctx,
+		query,
+		`{"title":true,"ingredients":"page.ingredients.toObject","prices":"page.prices.toObject","location":true,"counter":true,"date":true,"mealadds":true,"mark":true,"frei3":true,"printonly":true,"kombicategory":true,"categories":"page.categories.split"}`,
+		false,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("querying menu failed: %w", err)
+	}
+
+	// Return
+	return &interfaces.ResourceList{
+		ItemKind: resources.ResourceDish,
+		Items: util.Transform(*dishes, func(i *stwbremen.Dish) interfaces.Resource {
+			d, err := resources.DishFromDTO(*i)
+			if err != nil {
+				return &resources.Dish{}
+			}
+
+			return d
+		}),
+	}, nil
+
+}
+
+func (h *DishesHandler) GetParametersForVerb(verb interfaces.Verb) []params.Registration {
+	return []params.Registration{
+		{
+			Name:        paramDate,
+			ShortHand:   "d",
+			Description: "Menu date",
+			DefaultFunc: func() string { return time.Now().Format(time.DateOnly) },
+			ParseFunc:   func(value string) (any, error) { return time.Parse(time.DateOnly, value) },
+		},
+		{
+			Name:        paramLocation,
+			ShortHand:   "l",
+			Description: "Define the restaurant",
+			DefaultFunc: func() string { return "330" },
+			ParseFunc:   params.ParseString,
+		},
+	}
+}