feat(commands): implement session command handlers via runtime

pkg/commands/builtin.go

@@ -3,11 +3,30 @@ package commands
 import (
 	"context"
 	"fmt"
+	"strconv"
 	"strings"
 
 	"github.com/sipeed/picoclaw/pkg/config"
 )
 
+type runtimeContextKey struct{}
+
+// WithRuntime attaches command runtime capabilities to ctx for command handlers.
+func WithRuntime(ctx context.Context, runtime Runtime) context.Context {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	return context.WithValue(ctx, runtimeContextKey{}, runtime)
+}
+
+func runtimeFromContext(ctx context.Context) Runtime {
+	if ctx == nil {
+		return nil
+	}
+	runtime, _ := ctx.Value(runtimeContextKey{}).(Runtime)
+	return runtime
+}
+
 func BuiltinDefinitions(cfg *config.Config) []Definition {
 	return []Definition{
 		{
@@ -36,12 +55,18 @@ func BuiltinDefinitions(cfg *config.Config) []Definition {
 			Description: "Start a new chat session",
 			Usage:       "/new",
 			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+			Handler: func(ctx context.Context, req Request) error {
+				return handleNewCommand(ctx, req, cfg)
+			},
 		},
 		{
 			Name:        "session",
 			Description: "Manage chat sessions",
 			Usage:       "/session [list|resume <index>]",
 			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+			Handler: func(ctx context.Context, req Request) error {
+				return handleSessionCommand(ctx, req)
+			},
 		},
 		{
 			Name:        "show",
@@ -143,11 +168,114 @@ func commandArgs(text string) string {
 
 func replyText(text string) Handler {
 	return func(_ context.Context, req Request) error {
+		return reply(req, text)
+	}
+}
+
+func handleNewCommand(ctx context.Context, req Request, fallbackCfg *config.Config) error {
+	runtime := runtimeFromContext(ctx)
+	if runtime == nil || runtime.SessionOps() == nil || strings.TrimSpace(runtime.ScopeKey()) == "" {
+		return reply(req, "Command unavailable in current context.")
+	}
+
+	scopeKey := runtime.ScopeKey()
+	newSessionKey, err := runtime.SessionOps().StartNew(scopeKey)
+	if err != nil {
+		return reply(req, fmt.Sprintf("Failed to start new session: %v", err))
+	}
+
+	backlogLimit := config.DefaultSessionBacklogLimit
+	cfg := fallbackCfg
+	if runtime.Config() != nil {
+		cfg = runtime.Config()
+	}
+	if cfg != nil {
+		backlogLimit = cfg.Session.EffectiveBacklogLimit()
+	}
+
+	pruned, err := runtime.SessionOps().Prune(scopeKey, backlogLimit)
+	if err != nil {
+		return reply(req, fmt.Sprintf(
+			"Started new session (%s), but pruning old sessions failed: %v",
+			newSessionKey,
+			err,
+		))
+	}
+
+	if len(pruned) == 0 {
+		return reply(req, fmt.Sprintf("Started new session: %s", newSessionKey))
+	}
+	return reply(req, fmt.Sprintf("Started new session: %s (pruned %d old session(s))", newSessionKey, len(pruned)))
+}
+
+func handleSessionCommand(ctx context.Context, req Request) error {
+	runtime := runtimeFromContext(ctx)
+	if runtime == nil || runtime.SessionOps() == nil || strings.TrimSpace(runtime.ScopeKey()) == "" {
+		return reply(req, "Command unavailable in current context.")
+	}
+
+	args := strings.Fields(commandArgs(req.Text))
+	if len(args) < 1 {
+		return reply(req, "Usage: /session [list|resume <index>]")
+	}
+
+	scopeKey := runtime.ScopeKey()
+	switch args[0] {
+	case "list":
+		list, err := runtime.SessionOps().List(scopeKey)
+		if err != nil {
+			return reply(req, fmt.Sprintf("Failed to list sessions: %v", err))
+		}
+		if len(list) == 0 {
+			return reply(req, "No sessions found for current chat.")
+		}
+
+		lines := make([]string, 0, len(list)+1)
+		lines = append(lines, "Sessions for current chat:")
+		for _, item := range list {
+			activeMarker := " "
+			if item.Active {
+				activeMarker = "*"
+			}
+			updated := "-"
+			if !item.UpdatedAt.IsZero() {
+				updated = item.UpdatedAt.Format("2006-01-02 15:04")
+			}
+			lines = append(lines, fmt.Sprintf(
+				"%d. [%s] %s (%d msgs, updated %s)",
+				item.Ordinal,
+				activeMarker,
+				item.SessionKey,
+				item.MessageCnt,
+				updated,
+			))
+		}
+		return reply(req, strings.Join(lines, "\n"))
+
+	case "resume":
+		if len(args) != 2 {
+			return reply(req, "Usage: /session resume <index>")
+		}
+		index, err := strconv.Atoi(args[1])
+		if err != nil || index < 1 {
+			return reply(req, "Usage: /session resume <index>")
+		}
+		sessionKey, err := runtime.SessionOps().Resume(scopeKey, index)
+		if err != nil {
+			return reply(req, fmt.Sprintf("Failed to resume session %d: %v", index, err))
+		}
+		return reply(req, fmt.Sprintf("Resumed session %d: %s", index, sessionKey))
+
+	default:
+		return reply(req, "Usage: /session [list|resume <index>]")
+	}
+}
+
+func reply(req Request, text string) error {
 	if req.Reply == nil {
 		return nil
 	}
 	return req.Reply(text)
-	}
 }
 
 func enabledChannels(cfg *config.Config) []string {

pkg/commands/builtin_test.go

@@ -31,3 +31,31 @@ func TestBuiltinDefinitions_WhatsAppOnlyHasBasicCommands(t *testing.T) {
 		t.Fatalf("whatsapp should not include show/list, got %+v", names)
 	}
 }
+
+func TestBuiltinDefinitions_SessionCommandsHaveHandlers(t *testing.T) {
+	defs := BuiltinDefinitions(nil)
+
+	defByName := map[string]Definition{}
+	for _, def := range defs {
+		defByName[def.Name] = def
+	}
+
+	newDef, ok := defByName["new"]
+	if !ok {
+		t.Fatalf("missing /new definition")
+	}
+	if newDef.Handler == nil {
+		t.Fatalf("/new should provide a runtime-backed handler")
+	}
+	if !contains(newDef.Aliases, "reset") {
+		t.Fatalf("/new aliases=%v, want alias \"reset\"", newDef.Aliases)
+	}
+
+	sessionDef, ok := defByName["session"]
+	if !ok {
+		t.Fatalf("missing /session definition")
+	}
+	if sessionDef.Handler == nil {
+		t.Fatalf("/session should provide a runtime-backed handler")
+	}
+}

pkg/commands/session_handlers_test.go

@@ -0,0 +1,157 @@
+package commands
+
+import (
+	"context"
+	"testing"
+
+	"github.com/sipeed/picoclaw/pkg/config"
+	"github.com/sipeed/picoclaw/pkg/session"
+)
+
+type sessionHandlerFakeSessionOps struct {
+	startNewScopeKeys []string
+	startNewValue     string
+	startNewErr       error
+
+	pruneScopeKeys []string
+	pruneLimits    []int
+	pruneValue     []string
+	pruneErr       error
+
+	resumeScopeKeys []string
+	resumeIndices   []int
+	resumeValue     string
+	resumeErr       error
+}
+
+func (f *sessionHandlerFakeSessionOps) ResolveActive(scopeKey string) (string, error) {
+	return "", nil
+}
+
+func (f *sessionHandlerFakeSessionOps) StartNew(scopeKey string) (string, error) {
+	f.startNewScopeKeys = append(f.startNewScopeKeys, scopeKey)
+	return f.startNewValue, f.startNewErr
+}
+
+func (f *sessionHandlerFakeSessionOps) List(scopeKey string) ([]session.SessionMeta, error) {
+	return nil, nil
+}
+
+func (f *sessionHandlerFakeSessionOps) Resume(scopeKey string, index int) (string, error) {
+	f.resumeScopeKeys = append(f.resumeScopeKeys, scopeKey)
+	f.resumeIndices = append(f.resumeIndices, index)
+	return f.resumeValue, f.resumeErr
+}
+
+func (f *sessionHandlerFakeSessionOps) Prune(scopeKey string, limit int) ([]string, error) {
+	f.pruneScopeKeys = append(f.pruneScopeKeys, scopeKey)
+	f.pruneLimits = append(f.pruneLimits, limit)
+	return f.pruneValue, f.pruneErr
+}
+
+type sessionHandlerFakeRuntime struct {
+	channel string
+	scope   string
+	ops     SessionOps
+	cfg     *config.Config
+}
+
+func (f *sessionHandlerFakeRuntime) Channel() string {
+	return f.channel
+}
+
+func (f *sessionHandlerFakeRuntime) ScopeKey() string {
+	return f.scope
+}
+
+func (f *sessionHandlerFakeRuntime) SessionOps() SessionOps {
+	return f.ops
+}
+
+func (f *sessionHandlerFakeRuntime) Config() *config.Config {
+	return f.cfg
+}
+
+func TestSessionHandlers_New_UsesRuntimeSessionOps(t *testing.T) {
+	t.Helper()
+
+	ops := &sessionHandlerFakeSessionOps{
+		startNewValue: "scope#2",
+		pruneValue:    []string{"scope#1"},
+	}
+	runtime := &sessionHandlerFakeRuntime{
+		channel: "whatsapp",
+		scope:   "scope",
+		ops:     ops,
+		cfg: &config.Config{
+			Session: config.SessionConfig{BacklogLimit: 7},
+		},
+	}
+
+	ctx := WithRuntime(context.Background(), runtime)
+
+	var reply string
+	ex := NewExecutor(NewRegistry(BuiltinDefinitions(nil)))
+	res := ex.Execute(ctx, Request{
+		Channel: "whatsapp",
+		Text:    "/new",
+		Reply: func(text string) error {
+			reply = text
+			return nil
+		},
+	})
+
+	if res.Outcome != OutcomeHandled {
+		t.Fatalf("outcome=%v, want=%v", res.Outcome, OutcomeHandled)
+	}
+	if len(ops.startNewScopeKeys) != 1 || ops.startNewScopeKeys[0] != "scope" {
+		t.Fatalf("startNew calls=%v, want [scope]", ops.startNewScopeKeys)
+	}
+	if len(ops.pruneScopeKeys) != 1 || ops.pruneScopeKeys[0] != "scope" {
+		t.Fatalf("prune scope calls=%v, want [scope]", ops.pruneScopeKeys)
+	}
+	if len(ops.pruneLimits) != 1 || ops.pruneLimits[0] != 7 {
+		t.Fatalf("prune limits=%v, want [7]", ops.pruneLimits)
+	}
+	if reply != "Started new session: scope#2 (pruned 1 old session(s))" {
+		t.Fatalf("reply=%q", reply)
+	}
+}
+
+func TestSessionHandlers_SessionResume_UsesRuntimeSessionOps(t *testing.T) {
+	t.Helper()
+
+	ops := &sessionHandlerFakeSessionOps{resumeValue: "scope#3"}
+	runtime := &sessionHandlerFakeRuntime{
+		channel: "whatsapp",
+		scope:   "scope",
+		ops:     ops,
+		cfg:     &config.Config{},
+	}
+
+	ctx := WithRuntime(context.Background(), runtime)
+
+	var reply string
+	ex := NewExecutor(NewRegistry(BuiltinDefinitions(nil)))
+	res := ex.Execute(ctx, Request{
+		Channel: "whatsapp",
+		Text:    "/session resume 3",
+		Reply: func(text string) error {
+			reply = text
+			return nil
+		},
+	})
+
+	if res.Outcome != OutcomeHandled {
+		t.Fatalf("outcome=%v, want=%v", res.Outcome, OutcomeHandled)
+	}
+	if len(ops.resumeScopeKeys) != 1 || ops.resumeScopeKeys[0] != "scope" {
+		t.Fatalf("resume scope calls=%v, want [scope]", ops.resumeScopeKeys)
+	}
+	if len(ops.resumeIndices) != 1 || ops.resumeIndices[0] != 3 {
+		t.Fatalf("resume indices=%v, want [3]", ops.resumeIndices)
+	}
+	if reply != "Resumed session 3: scope#3" {
+		t.Fatalf("reply=%q", reply)
+	}
+}