ideas_from_ingredients skill and job (Feature 18) (#144)

Co-authored-by: orchestrator-agent <20+orchestrator-agent@code.cubecraftcreations.com>

internal/server/ideas.go

@@ -0,0 +1,53 @@
+package server
+
+import (
+	"errors"
+	"log/slog"
+	"net/http"
+
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/ideas"
+)
+
+// maxIdeasBody bounds a POST /ideas/from-ingredients body.
+const maxIdeasBody = 16 << 10
+
+// ideasFromIngredients is the POST /ideas/from-ingredients body. Both
+// fields are required.
+type ideasFromIngredients struct {
+	Ingredients []string `json:"ingredients"`
+	QuickOnly   *bool    `json:"quick_only"`
+}
+
+// postIdeasFromIngredients starts finding ideas from the ingredients on
+// hand and answers 202 with the jobId that GET /jobs/{id} reports on,
+// without waiting for the job. An ingredient list the household must
+// correct is 400.
+func postIdeasFromIngredients(logger *slog.Logger, svc *ideas.Service) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		body, err := decodePatch[ideasFromIngredients](http.MaxBytesReader(w, r.Body, maxIdeasBody))
+		if err != nil {
+			writeError(w, r, logger, http.StatusBadRequest, "invalid_request", err.Error())
+			return
+		}
+		switch {
+		case body.Ingredients == nil:
+			writeError(w, r, logger, http.StatusBadRequest, "invalid_request", "ingredients: required")
+			return
+		case body.QuickOnly == nil:
+			writeError(w, r, logger, http.StatusBadRequest, "invalid_request", "quick_only: required")
+			return
+		}
+		started, err := svc.StartFromIngredients(r.Context(), body.Ingredients, *body.QuickOnly)
+		var invalid *ideas.InvalidError
+		switch {
+		case errors.As(err, &invalid):
+			writeError(w, r, logger, http.StatusBadRequest, "invalid_request", invalid.Message)
+			return
+		case err != nil:
+			logger.ErrorContext(r.Context(), "start ideas from ingredients", "error", err)
+			writeError(w, r, logger, http.StatusInternalServerError, "internal", "internal error")
+			return
+		}
+		writeJSON(w, r, logger, http.StatusAccepted, started)
+	}
+}