Add DB interface

README.md

@@ -16,7 +16,7 @@ Go 1.16 or higher is required
 `go get -u github.com/HimbeerserverDE/multiserver`
 
 ## How to use
-**Note: The authentication databases of the minetest servers need to be deleted before multiserver can connect to them. You can convert minetest auth databases to the multiserver auth database scheme with [multiserver_converter](https://github.com/HimbeerserverDE/multiserver_converter).**
+**Note: The authentication databases of the minetest servers need to be deleted before multiserver can connect to them. You can convert minetest auth databases to the multiserver auth database schema with [multiserver_converter](https://github.com/HimbeerserverDE/multiserver_converter).**
 
 ### Running
 The `go get` command will create an executable file in `~/go/bin/multiserver`.

db.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+
+	_ "github.com/lib/pq"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type DB struct {
+	*sql.DB
+}
+
+// OpenSQLite3 opens and returns a SQLite3 database
+func OpenSQLite3(name, initSQL string) (*DB, error) {
+	os.Mkdir("storage", 0777)
+
+	db, err := sql.Open("sqlite3", "storage/"+name)
+	if err != nil {
+		return nil, err
+	}
+
+	if _, err := db.Exec(initSQL); err != nil {
+		db.Close()
+		return nil, err
+	}
+
+	return &DB{DB: db}, nil
+}
+
+// OpenPSQL opens and returns a PostgreSQL database
+func OpenPSQL(host, name, user, password string, port uint16) (*DB, error) {
+	psqlconn := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable", host, port, user, password, name)
+
+	db, err := sql.Open("postgres", psqlconn)
+	if err != nil {
+		return nil, err
+	}
+
+	err = db.Ping()
+	if err != nil {
+		db.Close()
+		return nil, err
+	}
+
+	return &DB{DB: db}, nil
+}
+
+// Query executes a SQL statement and stores the results
+func (db *DB) QueryRow(sql string, values []interface{}, results ...interface{}) error {
+	return db.DB.QueryRow(sql, values...).Scan(results...)
+}

go.mod

@@ -5,6 +5,7 @@ go 1.16
 require (
 	github.com/HimbeerserverDE/srp v0.0.0-20210331172529-2b5dbec6b82b
 	github.com/anon55555/mt v0.0.0-20210401173148-4c2536cce54b
+	github.com/lib/pq v1.10.1
 	github.com/mattn/go-sqlite3 v1.14.6
 	github.com/tncardoso/gocurses v0.0.0-20170428215319-6c1f6d2854e2
 	gopkg.in/yaml.v2 v2.4.0

go.sum

@@ -2,6 +2,8 @@ github.com/HimbeerserverDE/srp v0.0.0-20210331172529-2b5dbec6b82b h1:xqNC1S76U5U
 github.com/HimbeerserverDE/srp v0.0.0-20210331172529-2b5dbec6b82b/go.mod h1:pxNH8S2nh4n2DWE0ToX5GnnDr/uEAuaAhJsCpkDLIWw=
 github.com/anon55555/mt v0.0.0-20210401173148-4c2536cce54b h1:gyTxjlQCBIC7rVN2n6fAvz4sRXpOFMSIaw57r9ccJnA=
 github.com/anon55555/mt v0.0.0-20210401173148-4c2536cce54b/go.mod h1:jH4ER+ahjl7H6TczzK+q4V9sXY++U2Geh6/vt3r4Xvs=
+github.com/lib/pq v1.10.1 h1:6VXZrLU0jHBYyAqrSPa+MgPfnSvTPuMgK+k0o5kVFWo=
+github.com/lib/pq v1.10.1/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/mattn/go-sqlite3 v1.14.6 h1:dNPt6NO46WmLVt2DLNpwczCmdV5boIZ6g/tlDrlRUbg=
 github.com/mattn/go-sqlite3 v1.14.6/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
 github.com/tncardoso/gocurses v0.0.0-20170428215319-6c1f6d2854e2 h1:wAHqYwDeXe0nIJnz9dqSmBGiaoqBDCRBhV/ebefJe30=