Config file TOML parsing with basic tests

backend/go.mod

@@ -6,3 +6,5 @@ require (
 	github.com/jmoiron/sqlx v1.3.5
 	github.com/mattn/go-sqlite3 v1.14.22
 )
+
+require github.com/BurntSushi/toml v1.3.2 // indirect

backend/go.sum

@@ -1,3 +1,5 @@
+github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
+github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/jmoiron/sqlx v1.3.5 h1:vFFPA71p1o5gAeqtEAwLU4dnX2napprKtHr7PYIcN3g=

backend/internal/config/config.go

@@ -0,0 +1,55 @@
+package config
+
+import (
+	"os"
+
+	"github.com/BurntSushi/toml"
+)
+
+// Config is the configuration for the application
+// It defines how the TOML file should be structured
+type Config struct {
+	// The port to listen on
+	Port int `toml:"port"`
+	// The path to the SQLite database
+	DbPath string `toml:"db_path"`
+	// The username to use for the database
+	DbUser string `toml:"db_user"`
+	// The password to use for the database
+	DbPass string `toml:"db_pass"`
+	// The name of the database
+	DbName string `toml:"db_name"`
+}
+
+// WriteConfigToFile writes a Config to a file
+func WriteConfigToFile(c *Config, filename string) error {
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	return toml.NewEncoder(f).Encode(c)
+}
+
+// ReadConfigFromFile reads a Config from a file
+func ReadConfigFromFile(filename string) (*Config, error) {
+	c := NewConfig()
+	_, err := toml.DecodeFile(filename, c)
+	if err != nil {
+		return nil, err
+	}
+
+	return c, nil
+}
+
+// NewConfig returns a new Config
+func NewConfig() *Config {
+	return &Config{
+		Port:   8080,
+		DbPath: "./db.sqlite3",
+		DbUser: "username",
+		DbPass: "password",
+		DbName: "ttime",
+	}
+}

backend/internal/config/config_test.go

@@ -0,0 +1,68 @@
+package config
+
+import (
+	"os"
+	"testing"
+)
+
+func TestNewConfig(t *testing.T) {
+	c := NewConfig()
+	if c.Port != 8080 {
+		t.Errorf("Expected port to be 8080, got %d", c.Port)
+	}
+	if c.DbPath != "./db.sqlite3" {
+		t.Errorf("Expected db path to be ./db.sqlite3, got %s", c.DbPath)
+	}
+	if c.DbUser != "username" {
+		t.Errorf("Expected db user to be username, got %s", c.DbUser)
+	}
+	if c.DbPass != "password" {
+		t.Errorf("Expected db pass to be password, got %s", c.DbPass)
+	}
+	if c.DbName != "ttime" {
+		t.Errorf("Expected db name to be ttime, got %s", c.DbName)
+	}
+}
+
+func TestWriteConfig(t *testing.T) {
+	c := NewConfig()
+	err := WriteConfigToFile(c, "test.toml")
+	if err != nil {
+		t.Errorf("Expected no error, got %s", err)
+	}
+
+	// Remove the file after the test
+	_ = os.Remove("test.toml")
+}
+
+func TestReadConfig(t *testing.T) {
+	c := NewConfig()
+	err := WriteConfigToFile(c, "test.toml")
+	if err != nil {
+		t.Errorf("Expected no error, got %s", err)
+	}
+
+	c2, err := ReadConfigFromFile("test.toml")
+	if err != nil {
+		t.Errorf("Expected no error, got %s", err)
+	}
+
+	if c.Port != c2.Port {
+		t.Errorf("Expected port to be %d, got %d", c.Port, c2.Port)
+	}
+	if c.DbPath != c2.DbPath {
+		t.Errorf("Expected db path to be %s, got %s", c.DbPath, c2.DbPath)
+	}
+	if c.DbUser != c2.DbUser {
+		t.Errorf("Expected db user to be %s, got %s", c.DbUser, c2.DbUser)
+	}
+	if c.DbPass != c2.DbPass {
+		t.Errorf("Expected db pass to be %s, got %s", c.DbPass, c2.DbPass)
+	}
+	if c.DbName != c2.DbName {
+		t.Errorf("Expected db name to be %s, got %s", c.DbName, c2.DbName)
+	}
+
+	// Remove the file after the test
+	_ = os.Remove("test.toml")
+}