feat(auth): add database and auth token generation + storage

internal/database/database.go

@@ -0,0 +1,34 @@
+package database
+
+import (
+	"database/sql"
+	"log"
+
+	_ "github.com/glebarez/go-sqlite"
+)
+
+const FILENAME string = "storage.db"
+
+var database *sql.DB
+
+func OpenSQLite() error {
+	db, err := sql.Open("sqlite", FILENAME)
+	if err != nil {
+		return err
+	}
+	log.Println("Successfully connected to SQLite Database")
+	database = db
+	return nil
+}
+
+func InitDB() {
+	_, err := database.Exec(TOKENTABLECREATE)
+	if err != nil {
+		log.Fatal("Failed to init database:\n", err)
+	}
+	log.Println("Successfully initiated the Database!")
+}
+
+func Close() error {
+	return database.Close()
+}

internal/database/tokendb.go

@@ -0,0 +1,38 @@
+package database
+
+const TOKENTABLECREATE string = `
+	CREATE TABLE IF NOT EXISTS tokens (
+		name varchar(32) PRIMARY KEY NOT NULL,
+		token varchar(32) NOT NULL
+	);`
+
+const INSERTTOKENSQL string = "INSERT INTO tokens VALUES (?, ?);"
+const DELETETOKENSQL string = "DELETE FROM tokens WHERE name = ?;"
+const QUERYTOKENSQL string = "SELECT token FROM tokens;"
+
+func InsertToken(name string, token string) error {
+	_, err := database.Exec(INSERTTOKENSQL, name, token)
+	return err
+}
+
+func DeleteToken(name string) error {
+	_, err := database.Exec(DELETETOKENSQL, name)
+	return err
+}
+
+func ValidateToken(token string) (bool, error) {
+	result, err := database.Query(QUERYTOKENSQL)
+	if err != nil {
+		return false, err
+	}
+	defer result.Close()
+
+	var foundToken string
+	for result.Next() {
+		result.Scan(&token)
+		if token == foundToken {
+			return true, nil
+		}
+	}
+	return false, nil
+}