feat: impl requests handllers for contacts and healthcheck

internal/handler/contact_handler.go

@@ -0,0 +1,135 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+
+	"gitea.gabilandia.com/gabdlr/agenda-web-go/internal/models"
+	"gitea.gabilandia.com/gabdlr/agenda-web-go/internal/repository"
+)
+
+type ContactHandler struct {
+	repository repository.Repository[models.Contact]
+}
+
+const required_field = "is required"
+const invalid_id = "Invalid ID"
+
+func HandleContacts(mux *http.ServeMux, repo repository.Repository[models.Contact]) {
+	ch := &ContactHandler{repository: repo}
+	routes := []Route{
+		{"GET /contacts", ch.getAll},
+		{"GET /contacts/{id}", ch.getByID},
+		{"POST /contacts", ch.create},
+		{"PUT /contacts/{id}", ch.update},
+		{"DELETE /contacts/{id}", ch.delete},
+	}
+	NewBaseHandler(mux, routes)
+}
+
+func (h *ContactHandler) getAll(w http.ResponseWriter, r *http.Request) {
+	contacts, err := h.repository.GetAll()
+	if err != nil {
+		InternalError(w, err)
+		return
+	}
+	JSONSuccess(w, contacts, "Contact list retrieved successfully", http.StatusOK)
+}
+
+func (h *ContactHandler) getByID(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.Atoi(r.PathValue("id"))
+	if err != nil {
+		BadRequest(w, ErrInvalidFormat, invalid_id)
+		return
+	}
+
+	contact, err := h.repository.GetByID(id)
+	if err != nil {
+		InternalError(w, err)
+		return
+	}
+	if contact == nil {
+		NotFound(w, ErrNotFound, "Contact not found")
+		return
+	}
+	JSONSuccess(w, contact, "Contact retrieved successfully", http.StatusOK)
+}
+
+func (h *ContactHandler) create(w http.ResponseWriter, r *http.Request) {
+
+	var contact models.Contact
+	if err := json.NewDecoder(r.Body).Decode(&contact); err != nil {
+		BadRequest(w, ErrInvalidJSON, "Error parsing the contact")
+		return
+	}
+
+	if contact.Name == "" {
+		BadRequest(w, ErrMissingRequired, RequiredFieldErr("name"))
+		return
+	}
+
+	if contact.Company == "" {
+		BadRequest(w, ErrMissingRequired, RequiredFieldErr("company"))
+		return
+	}
+
+	if contact.Phone == "" {
+		BadRequest(w, ErrMissingRequired, RequiredFieldErr("phone"))
+		return
+	}
+
+	id, err := h.repository.Create(&contact)
+	if err != nil {
+		InternalError(w, err)
+		return
+	}
+
+	contact.ID = int(id)
+	JSONSuccess(w, contact, "Contact created successfully", http.StatusCreated)
+}
+
+func (h *ContactHandler) update(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.Atoi(r.PathValue("id"))
+	if err != nil {
+		BadRequest(w, ErrInvalidFormat, invalid_id)
+		return
+	}
+
+	var contact models.Contact
+	if err := json.NewDecoder(r.Body).Decode(&contact); err != nil {
+		BadRequest(w, ErrInvalidJSON, "Error parsing the contact")
+		return
+	}
+
+	contact.ID = id
+
+	updateErr := h.repository.Update(&contact)
+
+	if updateErr != nil {
+		InternalError(w, updateErr)
+		return
+	}
+
+	JSONSuccess(w, nil, "Contact updated successfully", http.StatusOK)
+}
+
+func (h *ContactHandler) delete(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.Atoi(r.PathValue("id"))
+
+	if err != nil {
+		BadRequest(w, ErrInvalidFormat, invalid_id)
+		return
+	}
+	rowsAffected, err := h.repository.Delete(id)
+
+	if err != nil {
+		InternalError(w, err)
+		return
+	}
+	if rowsAffected == 0 {
+		BadRequest(w, ErrNotFound, "Contact not found")
+		return
+	}
+	JSONSuccess(w, nil, "Contact deleted successfully", http.StatusOK)
+}