chore: init repository

internal/user/database.go

@@ -0,0 +1,113 @@
+package user
+
+import (
+	"database/sql"
+	"john/internal/storage/dao"
+	"john/internal/storage/dao/postgresql"
+
+	"github.com/lib/pq"
+)
+
+type Database struct {
+	*postgresql.DatabasePostgreSQL
+}
+
+func NewDatabase(db *postgresql.DatabasePostgreSQL) *Database {
+	return &Database{db}
+}
+
+func (db *Database) GetAllUsers() ([]*User, error) {
+	q := `
+		SELECT u.id, u.created_at, u.updated_at, u.email
+		FROM public.user u
+	`
+	rows, err := db.Session.Query(q)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	us := make([]*User, 0)
+	for rows.Next() {
+		u := User{}
+		err := rows.Scan(&u.ID, &u.CreatedAt, &u.UpdatedAt, &u.Email)
+		if err != nil {
+			return nil, err
+		}
+		us = append(us, &u)
+	}
+	return us, nil
+}
+
+func (db *Database) GetUsersByID(id string) (*User, error) {
+	q := `
+		SELECT u.id, u.created_at, u.updated_at, u.email
+		FROM public.user u
+		WHERE u.id = $1
+	`
+	row := db.Session.QueryRow(q, id)
+
+	u := User{}
+	err := row.Scan(&u.ID, &u.CreatedAt, &u.UpdatedAt, &u.Email)
+	if errPq, ok := err.(*pq.Error); ok {
+		return nil, postgresql.HandlePgError(errPq)
+	}
+	if err == sql.ErrNoRows {
+		return nil, dao.NewDAOError(dao.ErrTypeNotFound, err)
+	}
+	return &u, err
+}
+
+func (db *Database) CreateUser(user *User) error {
+	q := `
+		INSERT INTO public.user
+			(email, google_id)
+		VALUES
+			($1, $2)
+		RETURNING id, created_at
+	`
+
+	err := db.Session.
+		QueryRow(q, user.Email, user.GoogleID).
+		Scan(&user.ID, &user.CreatedAt)
+	if errPq, ok := err.(*pq.Error); ok {
+		return postgresql.HandlePgError(errPq)
+	}
+	return err
+}
+
+func (db *Database) DeleteUser(id string) error {
+	q := `
+		DELETE FROM public.user
+		WHERE id = $1
+	`
+
+	_, err := db.Session.Exec(q, id)
+	if errPq, ok := err.(*pq.Error); ok {
+		return postgresql.HandlePgError(errPq)
+	}
+	return err
+}
+
+func (db *Database) UpdateUser(user *User) error {
+	return nil
+}
+
+func (db *Database) GetUsersByGoogleID(id string) (*User, error) {
+	q := `
+		SELECT u.id, u.created_at, u.updated_at, u.email, u.google_id
+		FROM public.user u
+		WHERE u.google_id = $1
+	`
+	row := db.Session.QueryRow(q, id)
+
+	u := User{}
+	err := row.Scan(&u.ID, &u.CreatedAt, &u.UpdatedAt, &u.Email, &u.GoogleID)
+	if errPq, ok := err.(*pq.Error); ok {
+		return nil, postgresql.HandlePgError(errPq)
+	}
+	if err == sql.ErrNoRows {
+		return nil, dao.NewDAOError(dao.ErrTypeNotFound, err)
+	}
+	return &u, err
+}