feat: bootstrap cli entrypoint with bubble tea and toml config

internal/config/config.go

@@ -0,0 +1,70 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/BurntSushi/toml"
+)
+
+const configFileName = "config.toml"
+
+// Config is the user-owned TOML configuration for parasocial.
+type Config struct {
+	Streamers []string `toml:"streamers"`
+}
+
+// DefaultPath returns the config file path relative to the current working directory.
+func DefaultPath() string {
+	return configFileName
+}
+
+// LoadDefault reads config from the current working directory.
+func LoadDefault() (Config, error) {
+	return Load(DefaultPath())
+}
+
+// Load reads, normalizes, and validates a TOML config file.
+func Load(path string) (Config, error) {
+	var cfg Config
+	if _, err := toml.DecodeFile(path, &cfg); err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return Config{}, fmt.Errorf("config file not found at %s", path)
+		}
+		return Config{}, fmt.Errorf("load config %s: %w", path, err)
+	}
+
+	cfg.Streamers = normalizeStreamers(cfg.Streamers)
+	if len(cfg.Streamers) == 0 {
+		return Config{}, fmt.Errorf("config %s must define at least one streamer", path)
+	}
+
+	return cfg, nil
+}
+
+func normalizeStreamers(streamers []string) []string {
+	seen := make(map[string]struct{}, len(streamers))
+	normalized := make([]string, 0, len(streamers))
+
+	for _, streamer := range streamers {
+		streamer = normalizeStreamer(streamer)
+		if streamer == "" {
+			continue
+		}
+		if _, ok := seen[streamer]; ok {
+			continue
+		}
+		seen[streamer] = struct{}{}
+		normalized = append(normalized, streamer)
+	}
+
+	return normalized
+}
+
+func normalizeStreamer(streamer string) string {
+	streamer = strings.TrimSpace(streamer)
+	streamer = strings.TrimPrefix(streamer, "#")
+	return strings.ToLower(strings.TrimSpace(streamer))
+}

internal/config/config_test.go

@@ -0,0 +1,75 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestLoadValidConfig(t *testing.T) {
+	path := writeConfig(t, `streamers = [" Alpha ", "#Beta", "alpha", "", "  #Gamma  "]`)
+
+	cfg, err := Load(path)
+	if err != nil {
+		t.Fatalf("Load() error = %v", err)
+	}
+
+	want := []string{"alpha", "beta", "gamma"}
+	if !reflect.DeepEqual(cfg.Streamers, want) {
+		t.Fatalf("Streamers = %#v, want %#v", cfg.Streamers, want)
+	}
+}
+
+func TestLoadRejectsMissingStreamerList(t *testing.T) {
+	path := writeConfig(t, `streamers = []`)
+
+	_, err := Load(path)
+	if err == nil {
+		t.Fatal("Load() error = nil, want error")
+	}
+	if !strings.Contains(err.Error(), "at least one streamer") {
+		t.Fatalf("Load() error = %q, want empty streamer message", err)
+	}
+}
+
+func TestLoadRejectsInvalidTOML(t *testing.T) {
+	path := writeConfig(t, `streamers = [`)
+
+	_, err := Load(path)
+	if err == nil {
+		t.Fatal("Load() error = nil, want error")
+	}
+	if !strings.Contains(err.Error(), "load config") {
+		t.Fatalf("Load() error = %q, want load config context", err)
+	}
+}
+
+func TestDefaultPathUsesCurrentWorkingDirectoryConfig(t *testing.T) {
+	if got := DefaultPath(); got != "config.toml" {
+		t.Fatalf("DefaultPath() = %q, want %q", got, "config.toml")
+	}
+}
+
+func TestLoadRejectsMissingFile(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "missing.toml")
+
+	_, err := Load(path)
+	if err == nil {
+		t.Fatal("Load() error = nil, want error")
+	}
+	if !strings.Contains(err.Error(), "config file not found") {
+		t.Fatalf("Load() error = %q, want missing file context", err)
+	}
+}
+
+func writeConfig(t *testing.T, content string) string {
+	t.Helper()
+
+	path := filepath.Join(t.TempDir(), "config.toml")
+	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
+		t.Fatalf("write config: %v", err)
+	}
+	return path
+}