first commit

pkg/data/data.go

@@ -0,0 +1,58 @@
+package data
+
+import (
+	"database/sql"
+	"errors"
+	"log"
+	"path/filepath"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type (
+	Repository struct {
+		path string
+		conn *sql.DB
+	}
+)
+
+func New(path string) *Repository {
+	dbPath := filepath.Join(path, "system.db")
+	conn, err := sql.Open("sqlite3", dbPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	r := &Repository{
+		path: path,
+		conn: conn,
+	}
+
+	if err := r.check(); err != nil {
+		log.Fatalf("[PANIC] %s", err)
+	}
+	return r
+}
+
+func (r *Repository) Close() error {
+	return r.conn.Close()
+}
+
+func (r *Repository) check() error {
+	rows, err := r.conn.Query("SELECT value FROM system WHERE key = 'db.version'")
+	if err != nil {
+		m := new(migratorVersion1)
+		m.conn = r.conn
+		return m.create()
+	}
+	defer rows.Close()
+	var version string
+	if !rows.Next() {
+		return errors.New("no version found in the system database")
+	}
+	if err := rows.Scan(&version); err != nil {
+		return err
+	}
+	log.Printf("[INFO] database loaded with version %s", version)
+	return nil
+}

pkg/data/db_struct_v1.sql

@@ -0,0 +1,40 @@
+CREATE TABLE system (
+    key string primary key,
+    value string
+);
+
+CREATE TABLE users (
+    uuid string primary key,
+    username string,
+    password string
+);
+
+CREATE TABLE roles (
+    uuid string primary key,
+    descriptor string
+);
+
+CREATE TABLE role_permissions (
+    uuid string primary key,
+    role string,
+    system_permission string
+);
+
+CREATE TABLE user_roles (
+    uuid string primary key,
+    role string,
+    user string
+);
+
+CREATE TABLE saves (
+    uuid string primary key,
+    name string,
+    user string,
+    path string
+);
+
+INSERT INTO system (key, value) VALUES ('db.version', '1');
+INSERT INTO users (uuid, username) VALUES ('4b5b9489-973c-44e7-bae0-5ab23b56abe7', 'root');
+INSERT INTO roles (uuid, descriptor) VALUES ('4b5b9489-973c-44e7-bae0-5ab23b56abe7', 'root');
+INSERT INTO role_permissions (uuid, role, system_permission) VALUES ('4b5b9489-973c-44e7-bae0-5ab23b56abe7', '4b5b9489-973c-44e7-bae0-5ab23b56abe7', '*.*');
+INSERT INTO user_roles (uuid, role, user) VALUES ('4b5b9489-973c-44e7-bae0-5ab23b56abe7', '4b5b9489-973c-44e7-bae0-5ab23b56abe7', '4b5b9489-973c-44e7-bae0-5ab23b56abe7');

pkg/data/migration.go

@@ -0,0 +1,27 @@
+package data
+
+import (
+	"database/sql"
+	_ "embed"
+	"log"
+)
+
+//go:embed db_struct_v1.sql
+var dbStructV1SQL string
+
+type (
+	migratorVersion1 struct {
+		conn *sql.DB
+	}
+)
+
+func (m *migratorVersion1) create() error {
+	log.Printf("[INFO] no database, creating system database structure...")
+	_, err := m.conn.Exec(dbStructV1SQL)
+	if err != nil {
+		return err
+	}
+	log.Printf("[INFO] root user and role inserted by default")
+	log.Println("[INFO] database created with success!")
+	return nil
+}