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db.go
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db.go
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package db
import (
"database/sql"
"fmt"
"log"
_ "github.com/mattn/go-sqlite3"
)
type Store struct {
Db *sql.DB
}
func NewStore(dbName string) (Store, error) {
Db, err := getConnection(dbName)
if err != nil {
return Store{}, err
}
if err := createMigrations(dbName, Db); err != nil {
return Store{}, err
}
return Store{
Db,
}, nil
}
func getConnection(dbName string) (*sql.DB, error) {
var (
err error
db *sql.DB
)
if db != nil {
return db, nil
}
// Init SQLite3 database
db, err = sql.Open("sqlite3", dbName)
if err != nil {
// log.Fatalf("🔥 failed to connect to the database: %s", err.Error())
return nil, fmt.Errorf("🔥 failed to connect to the database: %s", err)
}
log.Println("🚀 Connected Successfully to the Database")
return db, nil
}
func createMigrations(dbName string, db *sql.DB) error {
stmt := `CREATE TABLE IF NOT EXISTS users (
id INTEGER PRIMARY KEY AUTOINCREMENT,
email VARCHAR(255) NOT NULL UNIQUE,
password VARCHAR(255) NOT NULL,
username VARCHAR(64) NOT NULL
);`
_, err := db.Exec(stmt)
if err != nil {
return err
}
stmt = `CREATE TABLE IF NOT EXISTS todos (
id INTEGER PRIMARY KEY AUTOINCREMENT,
created_by INTEGER NOT NULL,
title VARCHAR(64) NOT NULL,
description VARCHAR(255) NULL,
status BOOLEAN DEFAULT(FALSE),
created_at DATETIME default CURRENT_TIMESTAMP,
FOREIGN KEY(created_by) REFERENCES users(id)
);`
_, err = db.Exec(stmt)
if err != nil {
return err
}
return nil
}