Searching for availability by room

internal/repository/dbrepo/postgres.go

@@ -64,3 +64,26 @@ func (m *postgresDBRepo) InsertRoomRestriction(r models.RoomRestriction) error {
 
 	return nil
 }
+
+// SearchAvailabilityByDates returns true if availability exists for roomID, and false if no availability
+func (m *postgresDBRepo) SearchAvailabilityByDates(start, end time.Time, roomID int) (bool, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+
+	var numRows int
+	stmt := `select count(id) from room_restrictions
+             where room_id = $1 and
+             $2 < end_date and $3> start_date`
+
+	row := m.DB.QueryRowContext(ctx, stmt, roomID, start, end)
+	err := row.Scan(&numRows)
+	if err != nil {
+		return false, err
+	}
+
+	if numRows == 0 {
+		return true, nil
+	}
+
+	return false, nil
+}

internal/repository/repository.go

@@ -1,10 +1,14 @@
 package repository
 
-import "go-udemy-web-1/internal/models"
+import (
+	"go-udemy-web-1/internal/models"
+	"time"
+)
 
 type DatabaseRepo interface {
 	AllUsers() bool
 
 	InsertReservation(res models.Reservation) (int, error)
 	InsertRoomRestriction(res models.RoomRestriction) error
+	SearchAvailabilityByDates(start, end time.Time, roomID int) (bool, error)
 }