Add minimal config

server/config.go

@@ -0,0 +1,73 @@
+package server
+
+import (
+	"io"
+	"os"
+
+	"github.com/pelletier/go-toml/v2"
+)
+
+type Config struct {
+	SiteName       string `json:"siteName" toml:"siteName"`
+	HTTPListenAddr string `json:"httpListenAddr" toml:"HTTPListenAddr"`
+}
+
+func DefaultConfig() *Config {
+	return &Config{
+		SiteName:       "ministream",
+		HTTPListenAddr: ":8080",
+	}
+}
+
+func (c *Config) OverrideFromEnv() {
+	if siteName, ok := os.LookupEnv("MINISTREAM_SITENAME"); ok {
+		c.SiteName = siteName
+	}
+
+	if httpAddr, ok := os.LookupEnv("MINISTREAM_HTTPLISTENADDR"); ok {
+		c.HTTPListenAddr = httpAddr
+	}
+}
+
+func ConfigFromReader(r io.Reader) (*Config, error) {
+	var c Config
+
+	err := toml.NewDecoder(r).Decode(&c)
+	if err != nil {
+		return nil, err
+	}
+
+	return &c, nil
+}
+
+func ConfigFromFile(path string) (*Config, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	return ConfigFromReader(f)
+}
+
+func ConfigFromDefault() (*Config, error) {
+	var config *Config
+	defaultPaths := []string{
+		"ministream.toml",
+	}
+
+	for _, p := range defaultPaths {
+		c, err := ConfigFromFile(p)
+		if err != nil {
+			continue
+		}
+		config = c
+		break
+	}
+
+	if config == nil {
+		config = DefaultConfig()
+	}
+
+	return config, nil
+}

server/config_test.go

@@ -0,0 +1,37 @@
+package server_test
+
+import (
+	"strings"
+	"testing"
+
+	"git.t-juice.club/torjus/ministream/server"
+)
+
+func TestConfig(t *testing.T) {
+	t.Run("FromReader", func(t *testing.T) {
+		configString := `SiteName = "ministream.example.org"`
+		expectedSiteName := "ministream.example.org"
+		r := strings.NewReader(configString)
+
+		c, err := server.ConfigFromReader(r)
+		if err != nil {
+			t.Fatalf("Error reading config: %s", err)
+		}
+
+		if c.SiteName != expectedSiteName {
+			t.Errorf("SiteName incorrect. Got %s want %s", c.SiteName, expectedSiteName)
+		}
+	})
+	t.Run("OverrideFromEnv", func(t *testing.T) {
+		c := server.DefaultConfig()
+		expectedSiteName := "ms.example.org"
+
+		t.Setenv("MINISTREAM_SITENAME", expectedSiteName)
+
+		c.OverrideFromEnv()
+
+		if c.SiteName != expectedSiteName {
+			t.Errorf("SiteName incorrect. Got %s want %s", c.SiteName, expectedSiteName)
+		}
+	})
+}