updating rest-api

rest-api/models/event.go

@@ -12,12 +12,12 @@ type Event struct {
 	Description string    `binding:"required"`
 	Location    string    `binding:"required"`
 	DateTime    time.Time `binding:"required"`
-	UserID      int
+	UserID      int64
 }
 
 var events []Event = []Event{}
 
-func (e Event) Save() error {
+func (e *Event) Save() error {
 	query := `
 	INSERT INTO events(name, description, location, dateTime, user_id)
 	VALUES (?, ?, ?, ?, ?)`
@@ -105,3 +105,33 @@ func (event Event) Delete() error {
 
 	return err
 }
+
+func (e Event) Register(userId int64) error {
+	query := "INSERT INTO registrations(event_id, user_id) VALUES (?, ?)"
+	stmt, err := db.DB.Prepare(query)
+
+	if err != nil {
+		return err
+	}
+
+	defer stmt.Close()
+
+	_, err = stmt.Exec(e.ID, userId)
+
+	return err
+}
+
+func (e Event) CancelRegistration(userId int64) error {
+	query := "DELETE FROM registrations WHERE event_id = ? AND user_id = ?"
+	stmt, err := db.DB.Prepare(query)
+
+	if err != nil {
+		return err
+	}
+
+	defer stmt.Close()
+
+	_, err = stmt.Exec(e.ID, userId)
+
+	return err
+}

rest-api/models/user.go

@@ -1,6 +1,8 @@
 package models
 
 import (
+	"errors"
+
 	"example.com/rest-api/db"
 	"example.com/rest-api/utils"
 )
@@ -38,3 +40,23 @@ func (u User) Save() error {
 	u.ID = userId
 	return err
 }
+
+func (u *User) ValidateCredentials() error {
+	query := "SELECT id, password FROM users WHERE email = ?"
+	row := db.DB.QueryRow(query, u.Email)
+
+	var retrievedPassword string
+	err := row.Scan(&u.ID, &retrievedPassword)
+
+	if err != nil {
+		return errors.New("Credentials invalid")
+	}
+
+	passwordIsValid := utils.CheckPasswordHash(u.Password, retrievedPassword)
+
+	if !passwordIsValid {
+		return errors.New("Credentials invalid")
+	}
+
+	return nil
+}