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 +1,88 @@
+package design
+
+import (
+	"bytes"
+	"compress/gzip"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"strings"
+	"time"
+)
+
+const CanvasDataPrefix = "SHAKKERDATA://"
+
+type CanvasSnapshot struct {
+	ProjectID   string       `json:"projectId"`
+	Version     string       `json:"version"`
+	SnapshotID  string       `json:"snapshotId"`
+	Viewport    Viewport     `json:"viewport"`
+	Nodes       []Node       `json:"nodes"`
+	Connections []Connection `json:"connections"`
+	UpdatedAt   string       `json:"updatedAt"`
+}
+
+func EncodeCanvasSnapshot(project Project) (string, error) {
+	snapshot := CanvasSnapshot{
+		ProjectID:   project.ID,
+		Version:     project.Version,
+		SnapshotID:  project.SnapshotID,
+		Viewport:    project.Viewport,
+		Nodes:       append([]Node(nil), project.Nodes...),
+		Connections: append([]Connection(nil), project.Connections...),
+		UpdatedAt:   project.UpdatedAt.UTC().Format(time.RFC3339Nano),
+	}
+
+	payload, err := json.Marshal(snapshot)
+	if err != nil {
+		return "", err
+	}
+
+	var compressed bytes.Buffer
+	writer := gzip.NewWriter(&compressed)
+	if _, err := writer.Write(payload); err != nil {
+		_ = writer.Close()
+		return "", err
+	}
+	if err := writer.Close(); err != nil {
+		return "", err
+	}
+
+	return CanvasDataPrefix + base64.StdEncoding.EncodeToString(compressed.Bytes()), nil
+}
+
+func DecodeCanvasSnapshot(canvas string) (CanvasSnapshot, error) {
+	canvas = strings.TrimSpace(canvas)
+	if !strings.HasPrefix(canvas, CanvasDataPrefix) {
+		return CanvasSnapshot{}, fmt.Errorf("%w: canvas snapshot must use %s prefix", ErrInvalidInput, CanvasDataPrefix)
+	}
+
+	raw, err := base64.StdEncoding.DecodeString(strings.TrimPrefix(canvas, CanvasDataPrefix))
+	if err != nil {
+		return CanvasSnapshot{}, err
+	}
+	reader, err := gzip.NewReader(bytes.NewReader(raw))
+	if err != nil {
+		return CanvasSnapshot{}, err
+	}
+	defer reader.Close()
+
+	payload, err := io.ReadAll(reader)
+	if err != nil {
+		return CanvasSnapshot{}, err
+	}
+
+	var snapshot CanvasSnapshot
+	if err := json.Unmarshal(payload, &snapshot); err != nil {
+		return CanvasSnapshot{}, err
+	}
+	return snapshot, nil
+}
+
+func CanvasVersion(now time.Time) string {
+	if now.IsZero() {
+		now = time.Now()
+	}
+	return fmt.Sprintf("%d", now.UnixMilli())
+}