Initial commit

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/handler/exercise.go

@@ -0,0 +1,86 @@
+package handler
+
+import (
+	"database/sql"
+	"krafttrainer/internal/model"
+	"net/http"
+)
+
+func (h *Handler) handleListExercises(w http.ResponseWriter, r *http.Request) {
+	muscleGroup := r.URL.Query().Get("muscle_group")
+	query := r.URL.Query().Get("q")
+
+	exercises, err := h.store.ListExercises(muscleGroup, query)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "Fehler beim Laden der Übungen")
+		return
+	}
+	writeJSON(w, http.StatusOK, exercises)
+}
+
+func (h *Handler) handleCreateExercise(w http.ResponseWriter, r *http.Request) {
+	var req model.CreateExerciseRequest
+	if err := decodeJSON(r, &req); err != nil {
+		writeError(w, http.StatusBadRequest, "Ungültiger Request-Body")
+		return
+	}
+	if err := req.Validate(); err != nil {
+		writeError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+
+	exercise, err := h.store.CreateExercise(&req)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "Fehler beim Erstellen der Übung")
+		return
+	}
+	writeJSON(w, http.StatusCreated, exercise)
+}
+
+func (h *Handler) handleUpdateExercise(w http.ResponseWriter, r *http.Request) {
+	id, err := pathID(r, "id")
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "Ungültige ID")
+		return
+	}
+
+	var req model.CreateExerciseRequest
+	if err := decodeJSON(r, &req); err != nil {
+		writeError(w, http.StatusBadRequest, "Ungültiger Request-Body")
+		return
+	}
+	if err := req.Validate(); err != nil {
+		writeError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+
+	exercise, err := h.store.UpdateExercise(id, &req)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "Fehler beim Aktualisieren der Übung")
+		return
+	}
+	if exercise == nil {
+		writeError(w, http.StatusNotFound, "Übung nicht gefunden")
+		return
+	}
+	writeJSON(w, http.StatusOK, exercise)
+}
+
+func (h *Handler) handleDeleteExercise(w http.ResponseWriter, r *http.Request) {
+	id, err := pathID(r, "id")
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "Ungültige ID")
+		return
+	}
+
+	err = h.store.SoftDeleteExercise(id)
+	if err == sql.ErrNoRows {
+		writeError(w, http.StatusNotFound, "Übung nicht gefunden")
+		return
+	}
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "Fehler beim Löschen der Übung")
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}