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package database
import (
"database/sql"
"log"
// We're using sqlite3 because we want to make deploying the project easy.
// (ie, no need to set up a postgres server for a little forum application).
_ "github.com/mattn/go-sqlite3"
)
var db *sql.DB
// Initialises the tables in the database (if they do not exist).
func setup_db(db *sql.DB) error {
// FIXME executing multiple queries with one statement is definitely slower
// than a single query with multiple statments. IDK if our sqlite3 driver
// supports this, but a rewrite is needed if it does.
statements := [...]string{
("CREATE TABLE IF NOT EXISTS Users(" +
"uid INTEGER PRIMARY KEY AUTOINCREMENT," +
"email TEXT NOT NULL UNIQUE," +
"username TEXT," +
"password_hash TEXT NOT NULL," +
"password_salt TEXT NOT NULL);"),
("CREATE TABLE IF NOT EXISTS Posts(" +
"uid INTEGER PRIMARY KEY AUTOINCREMENT," +
"author INTEGER NOT NULL," +
"parent INTEGER," +
"time INTEGER NOT NULL," +
"subreact TEXT NOT NULL," +
"title TEXT NOT NULL," +
"contents TEXT NOT NULL," +
"thumbnail BLOB NOT NULL," +
"image BLOB NOT NULL," +
"FOREIGN KEY (author) REFERENCES Users (uid)," +
"FOREIGN KEY (parent) REFERENCES Posts (uid));"),
}
for _, statement := range statements {
_, err := db.Exec(statement)
if err != nil {
return err
}
}
return nil
}
// Call to initialise the database global var.
func Init(path string) {
var err error
db, err = sql.Open("sqlite3", path)
if err != nil {
log.Fatal(err)
}
err = db.Ping()
if err != nil {
log.Fatal(err)
}
err = setup_db(db)
if err != nil {
log.Fatal(err)
}
}
func GetDb() *sql.DB {
return db
}
// Call to close connection to database.
func Close() {
db.Close()
}
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