Create initial backend (#7)

Closes #3

Reviewed-on: #7

backend/db.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"gitea.seeseepuff.be/seeseemelk/mysqlite"
+	"log"
+)
+
+type Db struct {
+	db *mysqlite.Db
+}
+
+func NewDb(datasource string) *Db {
+	// Open a file-based database
+	db, err := mysqlite.OpenDb(datasource)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// Apply migrations
+	err = db.MigrateDb(migrations, "migrations")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	return &Db{db: db}
+}
+
+func (db *Db) GetUsers() ([]User, error) {
+	var err error
+	users := make([]User, 0)
+
+	for row := range db.db.Query("select id, name from users").Range(&err) {
+		user := User{}
+		err = row.Scan(&user.ID, &user.Name)
+		if err != nil {
+			return nil, err
+		}
+		users = append(users, user)
+	}
+	if err != nil {
+		return nil, err
+	}
+	return users, nil
+}