Initial commit: img-infinite-canvas AI design workbench MVP

Moteva-style AI design workbench replica. Home prompt creates a project; the project page provides an infinite canvas with node drag, zoom/pan, a design chat panel, history replay, image asset upload, and project save/regenerate. - Backend: go-zero, DDD layering, sqlc/pgx, optional PostgreSQL; memory or Redis cache; asynq job queue; MinIO/S3/R2/OSS object storage; sky-valley/pi agent runtime adapter. - Frontend: Next.js App Router + Vite artifact build, TypeScript, i18n, shadcn/ui components, auth (OTP/Turnstile/Google/WeChat). - Deploy: Docker Compose and k3s manifests. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-07 23:15:37 +08:00
commit 44406b72db
349 changed files with 73265 additions and 0 deletions
@@ -0,0 +1,99 @@
+package logic
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+	"time"
+
+	"img_infinite_canvas/internal/domain/design"
+)
+
+const streamingThinkingThrottle = 450 * time.Millisecond
+
+type messageEventState struct {
+	fingerprints map[string]string
+	emittedAt    map[string]time.Time
+}
+
+func newMessageEventState() *messageEventState {
+	return &messageEventState{
+		fingerprints: make(map[string]string),
+		emittedAt:    make(map[string]time.Time),
+	}
+}
+
+func (s *messageEventState) shouldEmit(message design.Message, now time.Time) bool {
+	if s == nil {
+		return true
+	}
+	key := messageEventKey(message)
+	fingerprint := messageEventFingerprint(message)
+	if s.fingerprints[key] == fingerprint {
+		return false
+	}
+	if _, seen := s.fingerprints[key]; !seen || messageEventBypassesThrottle(message) {
+		s.record(key, fingerprint, now)
+		return true
+	}
+	if last := s.emittedAt[key]; last.IsZero() || now.Sub(last) >= streamingThinkingThrottle {
+		s.record(key, fingerprint, now)
+		return true
+	}
+	return false
+}
+
+func (s *messageEventState) record(key string, fingerprint string, now time.Time) {
+	s.fingerprints[key] = fingerprint
+	s.emittedAt[key] = now
+}
+
+func messageEventKey(message design.Message) string {
+	if key := strings.TrimSpace(message.ID); key != "" {
+		return key
+	}
+	return fmt.Sprintf("%s:%s:%s:%s:%s", message.ThreadID, message.Role, message.Type, message.Title, message.CreatedAt.UTC().Format(time.RFC3339Nano))
+}
+
+func messageEventBypassesThrottle(message design.Message) bool {
+	if message.Type == "text_extraction_result" {
+		return true
+	}
+	switch strings.ToLower(strings.TrimSpace(message.Status)) {
+	case "running", "streaming":
+		return false
+	default:
+		return true
+	}
+}
+
+func projectEventFingerprint(project design.Project) string {
+	payload := struct {
+		ID           string               `json:"id"`
+		UserID       string               `json:"userId"`
+		Title        string               `json:"title"`
+		Brief        string               `json:"brief"`
+		Status       design.ProjectStatus `json:"status"`
+		Thumbnail    string               `json:"thumbnail"`
+		LastThreadID string               `json:"lastThreadId"`
+		Viewport     design.Viewport      `json:"viewport"`
+		Nodes        []design.Node        `json:"nodes"`
+		Connections  []design.Connection  `json:"connections"`
+	}{
+		ID:           project.ID,
+		UserID:       project.UserID,
+		Title:        project.Title,
+		Brief:        project.Brief,
+		Status:       project.Status,
+		Thumbnail:    project.Thumbnail,
+		LastThreadID: project.LastThreadID,
+		Viewport:     project.Viewport,
+		Nodes:        append([]design.Node(nil), project.Nodes...),
+		Connections:  append([]design.Connection(nil), project.Connections...),
+	}
+	data, err := json.Marshal(payload)
+	if err != nil {
+		return fmt.Sprintf("%s:%s:%s:%d:%d", project.ID, project.Status, project.LastThreadID, len(project.Nodes), len(project.Connections))
+	}
+	return string(data)
+}