91 lines
1.8 KiB
Go
91 lines
1.8 KiB
Go
package main
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import (
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"database/sql"
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"fmt"
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"os"
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"regexp"
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_ "github.com/lib/pq"
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_ "github.com/mattn/go-sqlite3"
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)
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const (
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DBTypeSQLite3 = iota
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DBTypePSQL
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)
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type DB struct {
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*sql.DB
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dbType int
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}
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// OpenSQLite3 opens and returns a SQLite3 database
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func OpenSQLite3(name, initSQL string) (*DB, error) {
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os.Mkdir("storage", 0777)
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db, err := sql.Open("sqlite3", "storage/"+name)
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if err != nil {
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return nil, err
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}
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if _, err := db.Exec(initSQL); err != nil {
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db.Close()
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return nil, err
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}
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return &DB{DB: db, dbType: DBTypeSQLite3}, nil
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}
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// OpenPSQL opens and returns a PostgreSQL database
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func OpenPSQL(host, name, user, password, initSQL string, port int) (*DB, error) {
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psqlconn := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable", host, port, user, password, name)
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db, err := sql.Open("postgres", psqlconn)
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if err != nil {
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return nil, err
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}
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err = db.Ping()
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if err != nil {
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db.Close()
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return nil, err
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}
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if _, err := db.Exec(initSQL); err != nil {
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db.Close()
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return nil, err
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}
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return &DB{DB: db, dbType: DBTypePSQL}, nil
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}
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// Type returns the type of database that is being interacted with
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func (db *DB) Type() int { return db.dbType }
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// Exec executes a SQL statement
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func (db *DB) Exec(sql string, values ...interface{}) (sql.Result, error) {
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if db.Type() == DBTypeSQLite3 {
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r, err := regexp.Compile("\\$+[0-9]")
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if err != nil {
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return nil, err
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}
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sql = r.ReplaceAllString(sql, "?")
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}
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return db.DB.Exec(sql, values...)
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}
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// QueryRow executes a SQL statement and stores the results
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func (db *DB) QueryRow(sql string, values ...interface{}) *sql.Row {
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if db.Type() == DBTypeSQLite3 {
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r, err := regexp.Compile("\\$+[0-9]")
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if err != nil {
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return nil
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}
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sql = r.ReplaceAllString(sql, "?")
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}
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return db.DB.QueryRow(sql, values...)
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}
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