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package sqlite3
import (
"database/sql"
"fmt"
"log"
"os"
"sync"
_ "github.com/mattn/go-sqlite3"
)
// DB holds the database connection, mutex & path.
type DB struct {
Path string
Mu *sync.RWMutex
Conn *sql.DB
}
// initErr will log the error and close the database connection if
// necessary.
func initErr(db *DB, err error) {
if db.Conn != nil {
db.Conn.Close()
}
log.Fatalf("Initialization Error :: %s", err.Error())
}
// Init initializes a sqlite3 database.
func Init(db *DB) {
var err error
// We set the database path, first the environment variable
// PERSEUS_DBPATH is checked. If it doesn't exist then use set
// it to the default (perseus.db).
envDBPath, exists := os.LookupEnv("PERSEUS_DBPATH")
if !exists {
envDBPath = "perseus.db"
}
db.Path = envDBPath
db.Conn, err = sql.Open("sqlite3", db.Path)
if err != nil {
log.Printf("sqlite3/init.go: %s\n",
"Failed to open database connection")
initErr(db, err)
}
// Create account table, this will hold information on account
// like id, type & other user specific information. We are
// using id because later we may want to add username change
// or account delete functionality. If we add user delete
// function then we'll just have to change the username here.
stmt, err := db.Conn.Prepare(`
CREATE TABLE IF NOT EXISTS account (
id TEXT PRIMARY KEY,
type TEXT NOT NULL DEFAULT user,
username TEXT NOT NULL,
password TEXT NOT NULL);`)
if err != nil {
log.Printf("sqlite3/init.go: %s\n",
"Failed to prepare statement")
initErr(db, err)
}
_, err = stmt.Exec()
stmt.Close()
if err != nil {
log.Printf("sqlite3/init.go: %s\n",
"Failed to execute statement")
initErr(db, err)
}
}
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