feat: Add REST API handlers for exercises, plans, and sessions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-19 19:50:09 +01:00
parent cd435a6569
commit e43373bfcf
7 changed files with 598 additions and 0 deletions
--- a/backend/internal/api/exercises.go
+++ b/backend/internal/api/exercises.go
@@ -0,0 +1,135 @@
+package api
+
+import (
+	"database/sql"
+	"net/http"
+
+	"training-tracker/internal/models"
+)
+
+type ExerciseHandler struct {
+	repo ExerciseRepository
+}
+
+func NewExerciseHandler(repo ExerciseRepository) *ExerciseHandler {
+	return &ExerciseHandler{repo: repo}
+}
+
+func (h *ExerciseHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	id, _ := parseID(r, "/api/exercises/")
+
+	switch r.Method {
+	case http.MethodGet:
+		if id > 0 {
+			h.getByID(w, r, id)
+		} else {
+			h.list(w, r)
+		}
+	case http.MethodPost:
+		h.create(w, r)
+	case http.MethodPut:
+		if id > 0 {
+			h.update(w, r, id)
+		} else {
+			respondError(w, http.StatusBadRequest, "exercise ID required")
+		}
+	case http.MethodDelete:
+		if id > 0 {
+			h.delete(w, r, id)
+		} else {
+			respondError(w, http.StatusBadRequest, "exercise ID required")
+		}
+	default:
+		respondError(w, http.StatusMethodNotAllowed, "method not allowed")
+	}
+}
+
+func (h *ExerciseHandler) list(w http.ResponseWriter, r *http.Request) {
+	exercises, err := h.repo.List(r.Context())
+	if err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to list exercises")
+		return
+	}
+	if exercises == nil {
+		exercises = []models.Exercise{}
+	}
+	respondJSON(w, http.StatusOK, exercises)
+}
+
+func (h *ExerciseHandler) getByID(w http.ResponseWriter, r *http.Request, id int64) {
+	exercise, err := h.repo.GetByID(r.Context(), id)
+	if err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to get exercise")
+		return
+	}
+	if exercise == nil {
+		respondError(w, http.StatusNotFound, "exercise not found")
+		return
+	}
+	respondJSON(w, http.StatusOK, exercise)
+}
+
+func (h *ExerciseHandler) create(w http.ResponseWriter, r *http.Request) {
+	var req models.CreateExerciseRequest
+	if err := decodeJSON(r, &req); err != nil {
+		respondError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if req.Name == "" {
+		respondError(w, http.StatusBadRequest, "name is required")
+		return
+	}
+	if req.Type != models.ExerciseTypeStrength && req.Type != models.ExerciseTypeCardio {
+		respondError(w, http.StatusBadRequest, "type must be 'strength' or 'cardio'")
+		return
+	}
+
+	exercise, err := h.repo.Create(r.Context(), &req)
+	if err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to create exercise")
+		return
+	}
+	respondJSON(w, http.StatusCreated, exercise)
+}
+
+func (h *ExerciseHandler) update(w http.ResponseWriter, r *http.Request, id int64) {
+	var req models.CreateExerciseRequest
+	if err := decodeJSON(r, &req); err != nil {
+		respondError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if req.Name == "" {
+		respondError(w, http.StatusBadRequest, "name is required")
+		return
+	}
+	if req.Type != models.ExerciseTypeStrength && req.Type != models.ExerciseTypeCardio {
+		respondError(w, http.StatusBadRequest, "type must be 'strength' or 'cardio'")
+		return
+	}
+
+	exercise, err := h.repo.Update(r.Context(), id, &req)
+	if err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to update exercise")
+		return
+	}
+	if exercise == nil {
+		respondError(w, http.StatusNotFound, "exercise not found")
+		return
+	}
+	respondJSON(w, http.StatusOK, exercise)
+}
+
+func (h *ExerciseHandler) delete(w http.ResponseWriter, r *http.Request, id int64) {
+	err := h.repo.Delete(r.Context(), id)
+	if err == sql.ErrNoRows {
+		respondError(w, http.StatusNotFound, "exercise not found")
+		return
+	}
+	if err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to delete exercise")
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}