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database.go
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database.go
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package database
import (
"database/sql"
"fmt"
"log"
_ "github.com/mattn/go-sqlite3"
"github.com/spf13/viper"
)
func Open(filename string) (*sql.DB, error) {
db, err := sql.Open(viper.GetString("database.type"), filename)
if err != nil {
return nil, err
}
err = initTables(db)
return db, nil
}
func initTables(db *sql.DB) error {
stmt, err := db.Prepare(`
CREATE TABLE IF NOT EXISTS
users(id INTEGER PRIMARY KEY, ident VARCHAR, pubkey BLOB, points INT, bots INT, lurkers INT, viewers INT)
`)
errCheck(err)
_, err = stmt.Exec()
errCheck(err)
stmt.Close()
stmt, err = db.Prepare(`
CREATE UNIQUE INDEX IF NOT EXISTS users_pubkey ON users(pubkey)
`)
_, err = stmt.Exec()
errCheck(err)
stmt.Close()
addColumn(db, "users", "followers", "INT")
addColumn(db, "users", "tier1subs", "INT")
addColumn(db, "users", "tier2subs", "INT")
addColumn(db, "users", "tier3subs", "INT")
addColumn(db, "users", "data", "BLOB")
return nil
}
func addColumn(db *sql.DB, table string, column string, columndef string) {
stmt, err := db.Prepare(fmt.Sprintf("SELECT %s FROM %s LIMIT 0, 1", column, table))
if err == nil {
stmt.Close()
return
}
stmt, err = db.Prepare(fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s %s", table, column, columndef))
errCheck(err)
defer stmt.Close()
_, err = stmt.Exec()
errCheck(err)
}
func errCheck(err error) {
if err != nil {
log.Fatal(err)
}
}