Initial commit

2026-07-12 13:47:34 +04:00
commit 51e2e789d0
37 changed files with 2005 additions and 0 deletions
@@ -0,0 +1,213 @@
+package handlers
+
+import (
+	"encoding/json"
+	"github.com/gorilla/mux"
+	"go_project/internal/configuration"
+	"go_project/internal/connection"
+	"go_project/internal/controllers"
+	"log"
+	"net/http"
+	"strconv"
+)
+
+func GetBookingById(response http.ResponseWriter, request *http.Request) {
+	log.Println("GetBookingById Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	requestVars := mux.Vars(request)
+	bookingIdStringValue := requestVars["id"]
+
+	id, err := strconv.Atoi(bookingIdStringValue)
+	if err != nil {
+		log.Println("Current id string value of the booking record to get: \"" + bookingIdStringValue + "\"")
+		log.Println("Error parse id string value to int:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	booking, err := controllers.BookingById(sqlHandler, id)
+	if err != nil {
+		log.Println("Error getting booking by id from database:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	bookingMarshaled, err := json.Marshal(booking)
+	if err != nil {
+		log.Println("Error marshaling booking to json string format:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	response.Header().Set("Content-Type", "application/json")
+	_, err = response.Write(bookingMarshaled)
+	if err != nil {
+		log.Println("Error writing booking to response:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	response.WriteHeader(http.StatusOK)
+}
+
+func GetAllBookings(response http.ResponseWriter, request *http.Request) {
+	log.Println("GetAllBookings Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	limit, offset := configuration.GetRecordsLimit(), configuration.GetRecordsOffset()
+	listBookingParams := controllers.ListBookingParams{Limit: limit, Offset: offset}
+
+	allBookings, err := controllers.AllBookings(sqlHandler, listBookingParams)
+	if err != nil {
+		log.Println("Error getting all bookings from database:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	allBookingsMarshaled, err := json.Marshal(allBookings)
+	if err != nil {
+		log.Println("Error marshaling all bookings:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	response.Header().Set("Content-Type", "application/json")
+	_, err = response.Write(allBookingsMarshaled)
+	if err != nil {
+		log.Println("Error writing all bookings to response:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	response.WriteHeader(http.StatusOK)
+}
+
+func CreateBooking(response http.ResponseWriter, request *http.Request) {
+	log.Println("CreateBooking Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	var createBookingParams controllers.CreateBookingParams
+	err = json.NewDecoder(request.Body).Decode(&createBookingParams)
+	if err != nil {
+		log.Println("CreateBooking: Values of createBookingParams:", createBookingParams)
+		log.Println("Error unmarshaling booking from json string format:", err)
+		response.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	newBooking, err := controllers.CreateBooking(sqlHandler, createBookingParams)
+	if err != nil {
+		log.Println("Error creating booking:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	newBookingMarshaled, err := json.Marshal(newBooking)
+	if err != nil {
+		log.Println("Error marshaling booking to json string format:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	response.Header().Set("Content-Type", "application/json")
+	_, err = response.Write(newBookingMarshaled)
+	if err != nil {
+		log.Println("Error writing booking to response:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	response.WriteHeader(http.StatusOK)
+}
+
+func UpdateBooking(response http.ResponseWriter, request *http.Request) {
+	log.Println("UpdateBookingById Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	var updateBookingParams controllers.UpdateBookingParams
+	err = json.NewDecoder(request.Body).Decode(&updateBookingParams)
+	if err != nil {
+		log.Println("UpdateBooking: Values of updateBookingParams:", updateBookingParams)
+		log.Println("Error unmarshaling booking from json string format:", err)
+		response.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	newBooking, err := controllers.UpdateBooking(sqlHandler, updateBookingParams)
+	if err != nil {
+		log.Println("Error updating booking by id from database:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	log.Println("SQL result: Updated booking record is:", newBooking)
+
+	response.WriteHeader(http.StatusOK)
+}
+
+func DeleteBookingById(response http.ResponseWriter, request *http.Request) {
+	log.Println("DeleteBookingById Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != err {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	requestVars := mux.Vars(request)
+	bookingIdStringValue := requestVars["id"]
+
+	id, err := strconv.Atoi(bookingIdStringValue)
+	if err != nil {
+		log.Println("Current id string value of the booking record to delete: \"" + bookingIdStringValue + "\"")
+		log.Println("Error parse id string value to int:", err)
+		response.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	sqlResult, err := controllers.DeleteBookingById(sqlHandler, id)
+	if err != nil {
+		log.Println("Error deleting booking by id from database:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	rowsAffected, err := sqlResult.RowsAffected()
+	if err != nil {
+		log.Println("Error getting number of rows affected by an delete:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	log.Println("SQL result: Number of rows affected by an delete:", rowsAffected)
+
+	response.WriteHeader(http.StatusOK)
+}