1142 lines
45 KiB
Python
1142 lines
45 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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海报服务层 - 重构版本
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封装核心功能，支持基于模板的动态内容生成和海报创建
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"""
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import logging
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import uuid
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import time
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import json
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import importlib
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import base64
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import binascii
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from io import BytesIO
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from typing import List, Dict, Any, Optional, Type, Union, cast
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from datetime import datetime
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from pathlib import Path
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from PIL import Image
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from core.config import ConfigManager, PosterConfig
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from core.ai import AIAgent
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from utils.file_io import OutputManager
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from utils.image_processor import ImageProcessor
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from poster.templates.base_template import BaseTemplate
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from api.services.database_service import DatabaseService
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logger = logging.getLogger(__name__)
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class PosterService:
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"""海报服务类"""
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def __init__(self, ai_agent: AIAgent, config_manager: ConfigManager, output_manager: OutputManager):
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"""初始化海报服务"""
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self.ai_agent = ai_agent
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self.config_manager = config_manager
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self.output_manager = output_manager
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self.db_service = DatabaseService(config_manager)
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self._templates = {}
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self._template_instances = {}
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self._image_usage_tracker = {}
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self._init_templates()
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def _init_templates(self):
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"""从数据库加载模板配置"""
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try:
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db_templates = self.db_service.get_active_poster_templates()
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if db_templates:
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self._templates = {t['id']: t for t in db_templates}
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logger.info(f"从数据库加载了 {len(self._templates)} 个模板")
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else:
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self._load_default_templates()
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logger.info("数据库无模板，使用默认模板配置")
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except Exception as e:
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logger.error(f"从数据库加载模板失败: {e}", exc_info=True)
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self._load_default_templates()
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def _load_default_templates(self):
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"""加载默认模板配置"""
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self._templates = {
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'vibrant': {
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'id': 'vibrant',
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'name': '活力风格',
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'handler_path': 'poster.templates.vibrant_template',
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'class_name': 'VibrantTemplate',
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'description': '适合景点、活动等充满活力的场景',
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'is_active': True
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},
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'business': {
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'id': 'business',
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'name': '商务风格',
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'handler_path': 'poster.templates.business_template',
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'class_name': 'BusinessTemplate',
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'description': '适合酒店、房地产等商务场景',
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'is_active': True
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}
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}
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def _load_template_handler(self, template_id: str) -> Optional[BaseTemplate]:
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"""动态加载模板处理器"""
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if template_id not in self._templates:
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logger.error(f"未找到模板: {template_id}")
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return None
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# 如果已经实例化过，直接返回缓存的实例
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if template_id in self._template_instances:
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return self._template_instances[template_id]
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template_info = self._templates[template_id]
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handler_path = template_info.get('handler_path')
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class_name = template_info.get('class_name')
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if not handler_path or not class_name:
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logger.error(f"模板 {template_id} 缺少 handler_path 或 class_name")
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return None
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try:
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# 动态导入模块和类
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module = importlib.import_module(handler_path)
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template_class = getattr(module, class_name)
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# 实例化模板
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template_instance = template_class()
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# 设置字体目录（如果配置了）
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from core.config import PosterConfig
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# poster_config = self.config_manager.get_config('poster', PosterConfig)
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# if poster_config:
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# font_dir = poster_config.font_dir
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# if font_dir and hasattr(template_instance, 'set_font_dir'):
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# template_instance.set_font_dir(font_dir)
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# 缓存实例以便重用
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self._template_instances[template_id] = template_instance
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logger.info(f"成功加载模板处理器: {template_id} ({handler_path}.{class_name})")
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return template_instance
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except (ImportError, AttributeError) as e:
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logger.error(f"加载模板处理器失败: {e}", exc_info=True)
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return None
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def reload_templates(self):
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"""重新加载模板信息"""
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logger.info("重新加载模板信息...")
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self._init_templates()
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# 清除缓存的模板实例，以便重新加载
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self._template_instances = {}
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def get_available_templates(self) -> List[Dict[str, Any]]:
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"""获取所有可用的模板信息"""
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result = []
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for tid in self._templates:
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template = self._templates[tid]
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if template.get('is_active', True): # 默认为激活状态
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template_info = {
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"id": template["id"],
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"name": template["name"],
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"description": template["description"],
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"handlerPath": template.get("handler_path", ""),
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"className": template.get("class_name", ""),
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"isActive": template.get("is_active", True)
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}
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result.append(template_info)
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return result
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def get_template_info(self, template_id: str) -> Optional[Dict[str, Any]]:
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"""获取指定模板的简化信息"""
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template = self._templates.get(template_id)
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if not template:
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return None
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return {
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"id": template["id"],
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"name": template["name"],
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"description": template["description"],
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"has_prompts": bool(template.get("system_prompt") and template.get("user_prompt_template")),
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"input_format": template.get("input_format", {}),
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"output_format": template.get("output_format", {}),
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"is_active": template.get("is_active", False)
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}
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async def generate_poster(self,
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template_id: str,
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poster_content: Optional[Dict[str, Any]],
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content_id: Optional[str],
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product_id: Optional[str],
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scenic_spot_id: Optional[str],
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images_base64: Optional[List[str]] ,
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num_variations: int = 1,
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force_llm_generation: bool = False,
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generate_psd: bool = False,
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psd_output_path: Optional[str] = None,
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generate_fabric_json: bool = False) -> Dict[str, Any]:
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"""
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统一的海报生成入口
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Args:
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template_id: 模板ID
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poster_content: 用户提供的海报内容（可选）
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content_id: 内容ID，用于从数据库获取内容（可选）
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product_id: 产品ID，用于从数据库获取产品信息（可选）
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scenic_spot_id: 景点ID，用于从数据库获取景点信息（可选）
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images_base64: 图片base64编码，用于生成海报（可选）
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num_variations: 需要生成的变体数量
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force_llm_generation: 是否强制使用LLM生成内容
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generate_psd: 是否生成PSD分层文件
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psd_output_path: PSD文件输出路径（可选，默认自动生成）
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generate_fabric_json: 是否生成Fabric.js JSON格式
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Returns:
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生成结果字典，包含PNG图像和可选的PSD文件、Fabric.js JSON
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"""
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start_time = time.time()
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# 添加参数调试信息
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logger.info("=" * 100)
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logger.info("海报生成服务 - 接收到的参数:")
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logger.info(f" template_id: {template_id} (类型: {type(template_id)})")
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logger.info(f" content_id: {content_id} (类型: {type(content_id)})")
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logger.info(f" product_id: {product_id} (类型: {type(product_id)})")
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logger.info(f" scenic_spot_id: {scenic_spot_id} (类型: {type(scenic_spot_id)})")
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logger.info(f" poster_content: {poster_content is not None}")
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logger.info(f" poster_content详细内容: {poster_content}")
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logger.info(f" force_llm_generation: {force_llm_generation}")
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logger.info("=" * 100)
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# 1. 动态加载模板处理器
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template_handler = self._load_template_handler(template_id)
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if not template_handler:
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raise ValueError(f"无法为模板ID '{template_id}' 加载处理器。")
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# 2. 准备内容 (LLM或用户提供)
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final_content = poster_content
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if force_llm_generation or not final_content:
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logger.info(f"为模板 {template_id} 按需生成内容...")
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final_content = await self._generate_content_with_llm(template_id, content_id, product_id, scenic_spot_id, poster_content)
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if not final_content:
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raise ValueError("无法获取用于生成海报的内容")
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# # 3. 准备图片
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# images = []
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# if image_ids:
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# images = self.db_service.get_images_by_ids(image_ids)
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# if not images:
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# raise ValueError("无法获取指定的图片")
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# # 3. 图片解码
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images = None
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# 获取模板的默认尺寸，如果获取不到则使用标准尺寸
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template_size = getattr(template_handler, 'size', (900, 1200))
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if images_base64 and images_base64.strip():
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try:
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# 移除可能存在的MIME类型前缀
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if images_base64.startswith("data:"):
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images_base64 = images_base64.split(",", 1)[1]
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# 彻底清理base64字符串 - 移除所有空白字符
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images_base64 = ''.join(images_base64.split())
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# 验证base64字符串长度（应该是4的倍数）
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if len(images_base64) % 4 != 0:
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# 添加必要的填充
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images_base64 += '=' * (4 - len(images_base64) % 4)
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logger.info(f"为base64字符串添加了填充，最终长度: {len(images_base64)}")
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logger.info(f"准备解码base64数据，长度: {len(images_base64)}, 前20字符: {images_base64[:20]}...")
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# 解码base64
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image_bytes = base64.b64decode(images_base64)
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logger.info(f"base64解码成功，图片数据大小: {len(image_bytes)} bytes")
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# 验证解码后的数据不为空
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if len(image_bytes) == 0:
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raise ValueError("解码后的图片数据为空")
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# 检查文件头判断图片格式
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file_header = image_bytes[:10]
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if file_header.startswith(b'\xff\xd8\xff'):
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logger.info("检测到JPEG格式图片")
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elif file_header.startswith(b'\x89PNG'):
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logger.info("检测到PNG格式图片")
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else:
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logger.warning(f"未识别的图片格式，文件头: {file_header.hex()}")
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# 创建PIL Image对象
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image_io = BytesIO(image_bytes)
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images = Image.open(image_io)
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# 验证图片是否成功打开
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images.verify() # 验证图片完整性
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# 重新打开图片（verify后需要重新打开）
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image_io.seek(0)
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images = Image.open(image_io)
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logger.info(f"图片解码成功，格式: {images.format}, 尺寸: {images.size}, 模式: {images.mode}")
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except binascii.Error as e:
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logger.error(f"Base64解码失败: {e}")
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logger.error(f"问题数据长度: {len(images_base64) if 'images_base64' in locals() else 'unknown'}")
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# 创建一个与目标大小一致的纯黑底图
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images = Image.new('RGB', template_size, color='black')
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logger.info(f"创建默认黑色背景图，尺寸: {template_size}")
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except Exception as e:
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logger.error(f"图片处理失败: {e}")
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logger.error(f"错误类型: {type(e).__name__}")
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if 'image_bytes' in locals():
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logger.error(f"图片数据大小: {len(image_bytes)} bytes, 前20字节: {image_bytes[:20].hex()}")
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# 创建一个与目标大小一致的纯黑底图
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images = Image.new('RGB', template_size, color='black')
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logger.info(f"创建默认黑色背景图，尺寸: {template_size}")
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else:
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logger.warning("未提供图片数据，使用默认黑色背景图")
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# 创建一个与目标大小一致的纯黑底图
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images = Image.new('RGB', template_size, color='black')
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logger.info(f"创建默认黑色背景图，尺寸: {template_size}")
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# 4. 调用模板生成海报
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try:
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posters = template_handler.generate(
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content=final_content,
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images=images,
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num_variations=num_variations
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)
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if not posters:
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raise ValueError("模板未能生成有效的海报")
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# 5. 保存海报并返回结果
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variations = []
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psd_files = []
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fabric_jsons = []
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i=0 ## 用于多个海报时，指定海报的编号，此时只有一个没有用上，但是接口开放着。
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output_path = self._save_poster(posters, template_id, i)
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if output_path:
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# 获取图像尺寸
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image_size = [posters.width, posters.height] if hasattr(posters, 'width') else [1350, 1800]
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variations.append({
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"id": f"{template_id}_v{i}",
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"image": self._image_to_base64(posters),
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"format": "PNG",
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"size": image_size,
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"file_path": str(output_path)
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})
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# 6. 如果需要，生成PSD分层文件
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if generate_psd:
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psd_result = self._generate_psd_file(
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template_handler, images, final_content,
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template_id, i, psd_output_path
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)
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if psd_result:
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psd_files.append(psd_result)
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# 7. 如果需要，生成Fabric.js JSON
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if generate_fabric_json:
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fabric_json = self._generate_fabric_json(final_content, template_id, image_size, images)
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fabric_jsons.append(fabric_json)
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# 记录模板使用情况
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self._update_template_stats(template_id, bool(variations), time.time() - start_time)
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return {
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"requestId": f"poster-{datetime.now().strftime('%Y%m%d-%H%M%S')}-{str(uuid.uuid4())[:8]}",
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"templateId": template_id,
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"resultImagesBase64": variations,
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"psdFiles": psd_files if psd_files else None,
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"fabricJsons": fabric_jsons if fabric_jsons else None,
|
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"metadata": {
|
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"generation_time": f"{time.time() - start_time:.2f}s",
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"model_used": self.ai_agent.config.model if force_llm_generation or not poster_content else None,
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||
"num_variations": len(variations),
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||
"psd_generated": bool(psd_files),
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||
"fabric_json_generated": bool(fabric_jsons)
|
||
}
|
||
}
|
||
except Exception as e:
|
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logger.error(f"生成海报时发生错误: {e}", exc_info=True)
|
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self._update_template_stats(template_id, False, time.time() - start_time)
|
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raise ValueError(f"生成海报失败: {str(e)}")
|
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|
||
def _save_poster(self, poster: Image.Image, template_id: str, variation_id: int=1) -> Optional[Path]:
|
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"""保存海报到文件系统"""
|
||
try:
|
||
# 创建唯一的主题ID用于保存
|
||
topic_id = f"poster_{template_id}_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
|
||
|
||
# 获取输出目录
|
||
output_dir = self.output_manager.get_topic_dir(topic_id)
|
||
|
||
# 生成文件名
|
||
file_name = f"{template_id}_v{variation_id}.png"
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file_path = output_dir / file_name
|
||
|
||
# 保存图像
|
||
poster.save(file_path, format="PNG")
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||
logger.info(f"海报已保存: {file_path}")
|
||
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||
return file_path
|
||
except Exception as e:
|
||
logger.error(f"保存海报失败: {e}", exc_info=True)
|
||
return None
|
||
|
||
def _image_to_base64(self, image: Image.Image) -> str:
|
||
"""将PIL图像转换为base64字符串"""
|
||
buffer = BytesIO()
|
||
image.save(buffer, format="PNG")
|
||
return base64.b64encode(buffer.getvalue()).decode('utf-8')
|
||
|
||
def _update_template_stats(self, template_id: str, success: bool, duration: float):
|
||
"""更新模板使用统计"""
|
||
try:
|
||
# 调用数据库服务的方法更新统计
|
||
self.db_service.update_template_usage_stats(
|
||
template_id=template_id,
|
||
success=success,
|
||
processing_time=duration
|
||
)
|
||
except Exception as e:
|
||
logger.warning(f"更新模板统计失败: {e}")
|
||
|
||
async def _generate_content_with_llm(self, template_id: str, content_id: Optional[str],
|
||
product_id: Optional[str], scenic_spot_id: Optional[str],
|
||
poster_content: Optional[Any] = None) -> Optional[Dict[str, Any]]:
|
||
"""使用LLM生成海报内容"""
|
||
# 获取提示词 - 直接从数据库模板信息中获取
|
||
template_info = self._templates.get(template_id, {})
|
||
system_prompt = template_info.get('system_prompt', "")
|
||
user_prompt_template = template_info.get('user_prompt_template', "")
|
||
|
||
if not system_prompt or not user_prompt_template:
|
||
logger.error(f"模板 {template_id} 缺少提示词配置")
|
||
logger.debug(f"模板信息: {template_info}")
|
||
return None
|
||
|
||
logger.info(f"成功加载模板 {template_id} 的提示词配置")
|
||
|
||
# 获取相关数据 - 将字符串ID转换为整数
|
||
data = {}
|
||
|
||
def safe_int_convert(id_str: Optional[str]) -> Optional[int]:
|
||
"""安全将字符串ID转换为整数"""
|
||
if not id_str:
|
||
return None
|
||
try:
|
||
# 如果ID包含非数字字符，只提取数字部分或返回None
|
||
if id_str.isdigit():
|
||
return int(id_str)
|
||
else:
|
||
# 对于类似 "generated_note_1753693091224_0" 的ID，提取数字部分
|
||
import re
|
||
numbers = re.findall(r'\d+', id_str)
|
||
if numbers:
|
||
return int(numbers[0]) # 使用第一个数字序列
|
||
return None
|
||
except (ValueError, TypeError):
|
||
logger.warning(f"无法转换ID为整数: {id_str}")
|
||
return None
|
||
|
||
if content_id:
|
||
content_id_int = safe_int_convert(content_id)
|
||
if content_id_int:
|
||
data['content'] = self.db_service.get_content_by_id(content_id_int)
|
||
if product_id:
|
||
product_id_int = safe_int_convert(product_id)
|
||
if product_id_int:
|
||
data['product'] = self.db_service.get_product_by_id(product_id_int)
|
||
if scenic_spot_id:
|
||
scenic_spot_id_int = safe_int_convert(scenic_spot_id)
|
||
if scenic_spot_id_int:
|
||
data['scenic_spot'] = self.db_service.get_scenic_spot_by_id(scenic_spot_id_int)
|
||
|
||
logger.info(f"获取到的数据: content={data.get('content') is not None}, product={data.get('product') is not None}, scenic_spot={data.get('scenic_spot') is not None}")
|
||
|
||
# 格式化数据为简洁的文本格式，参考其他模块的做法
|
||
try:
|
||
logger.info("开始格式化数据...")
|
||
|
||
# 景区信息格式化
|
||
scenic_info = "无相关景区信息"
|
||
if data.get('scenic_spot'):
|
||
logger.info("正在格式化景区信息...")
|
||
spot = data['scenic_spot']
|
||
scenic_info = f"""景区名称: {spot.get('name', '')}
|
||
地址: {spot.get('address', '')}
|
||
描述: {spot.get('description', '')}
|
||
优势: {spot.get('advantage', '')}
|
||
亮点: {spot.get('highlight', '')}
|
||
交通信息: {spot.get('trafficInfo', '')}"""
|
||
logger.info("景区信息格式化完成")
|
||
|
||
# 产品信息格式化
|
||
product_info = "无相关产品信息"
|
||
if data.get('product'):
|
||
logger.info("正在格式化产品信息...")
|
||
product = data['product']
|
||
product_info = f"""产品名称: {product.get('productName', '')}
|
||
原价: {product.get('originPrice', '')}
|
||
实际价格: {product.get('realPrice', '')}
|
||
套餐信息: {product.get('packageInfo', '')}
|
||
核心优势: {product.get('keyAdvantages', '')}
|
||
亮点: {product.get('highlights', '')}
|
||
详细描述: {product.get('detailedDescription', '')}"""
|
||
logger.info("产品信息格式化完成")
|
||
|
||
# 内容信息格式化
|
||
tweet_info = "无相关内容信息"
|
||
if data.get('content'):
|
||
logger.info("正在格式化内容信息...")
|
||
content = data['content']
|
||
tweet_info = f"""标题: {content.get('title', '')}
|
||
内容: {content.get('content', '')}"""
|
||
logger.info("内容信息格式化完成")
|
||
|
||
logger.info("开始构建用户提示词...")
|
||
# 构建用户提示词
|
||
user_prompt = user_prompt_template.format(
|
||
scenic_info=scenic_info,
|
||
product_info=product_info,
|
||
tweet_info=tweet_info
|
||
)
|
||
|
||
logger.info(f"用户提示词构建成功，长度: {len(user_prompt)}")
|
||
|
||
except Exception as e:
|
||
logger.error(f"格式化提示词时发生错误: {e}", exc_info=True)
|
||
# 提供兜底方案
|
||
user_prompt = f"""{user_prompt_template}
|
||
|
||
当前可用数据:
|
||
- 景区信息: {'有' if data.get('scenic_spot') else '无'}
|
||
- 产品信息: {'有' if data.get('product') else '无'}
|
||
- 内容信息: {'有' if data.get('content') else '无'}
|
||
|
||
请根据可用信息生成海报内容。"""
|
||
|
||
try:
|
||
response, _, _, _ = await self.ai_agent.generate_text(
|
||
system_prompt=system_prompt,
|
||
user_prompt=user_prompt,
|
||
use_stream=True
|
||
)
|
||
|
||
# 提取JSON响应
|
||
json_start = response.find('{')
|
||
json_end = response.rfind('}') + 1
|
||
if json_start != -1 and json_end != -1:
|
||
result = json.loads(response[json_start:json_end])
|
||
logger.info(f"LLM生成内容成功: {list(result.keys())}")
|
||
return result
|
||
else:
|
||
logger.error(f"LLM响应中未找到JSON格式内容: {response[:200]}...")
|
||
return None
|
||
|
||
except json.JSONDecodeError as e:
|
||
logger.error(f"解析LLM响应JSON失败: {e}")
|
||
return None
|
||
except Exception as e:
|
||
logger.error(f"生成内容时发生错误: {e}", exc_info=True)
|
||
return None
|
||
|
||
def _generate_psd_file(self, template_handler: BaseTemplate, images: Image.Image,
|
||
content: Dict[str, Any], template_id: str,
|
||
variation_id: int, custom_output_path: Optional[str] = None) -> Optional[Dict[str, Any]]:
|
||
"""
|
||
生成Fabric.js JSON文件（保持接口兼容性，实际生成JSON而非PSD）
|
||
|
||
Args:
|
||
template_handler: 模板处理器实例
|
||
images: 图像数据
|
||
content: 海报内容
|
||
template_id: 模板ID
|
||
variation_id: 变体ID
|
||
custom_output_path: 自定义输出路径
|
||
|
||
Returns:
|
||
JSON文件信息字典，包含文件路径、base64编码等
|
||
"""
|
||
try:
|
||
# 获取图像尺寸
|
||
image_size = [images.width, images.height] if hasattr(images, 'width') else [900, 1200]
|
||
|
||
# 生成Fabric.js JSON数据
|
||
fabric_json = self._generate_fabric_json(content, template_id, image_size, images)
|
||
|
||
# 生成JSON文件路径
|
||
if custom_output_path:
|
||
json_filename = custom_output_path
|
||
if not json_filename.endswith('.json'):
|
||
json_filename += '.json'
|
||
else:
|
||
timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
|
||
json_filename = f"{template_id}_fabric_v{variation_id}_{timestamp}.json"
|
||
|
||
# 获取输出目录
|
||
topic_id = f"poster_{template_id}_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
|
||
output_dir = self.output_manager.get_topic_dir(topic_id)
|
||
json_path = output_dir / json_filename
|
||
|
||
# 保存JSON文件
|
||
logger.info(f"开始生成Fabric.js JSON文件: {json_path}")
|
||
try:
|
||
with open(json_path, 'w', encoding='utf-8') as f:
|
||
json.dump(fabric_json, f, ensure_ascii=False, indent=2)
|
||
logger.info(f"Fabric.js JSON文件保存成功: {json_path}")
|
||
except Exception as e:
|
||
logger.error(f"保存JSON文件失败: {e}")
|
||
return None
|
||
|
||
# 获取文件信息
|
||
file_size = Path(json_path).stat().st_size
|
||
|
||
# 生成JSON的base64编码
|
||
json_base64 = None
|
||
try:
|
||
json_string = json.dumps(fabric_json, ensure_ascii=False)
|
||
json_base64 = base64.b64encode(json_string.encode('utf-8')).decode('utf-8')
|
||
except Exception as e:
|
||
logger.warning(f"生成JSON base64编码失败: {e}")
|
||
|
||
logger.info(f"Fabric.js JSON文件生成成功: {json_path} ({file_size/1024:.1f}KB)")
|
||
|
||
return {
|
||
"id": f"{template_id}_v{variation_id}_fabric",
|
||
"filename": json_filename,
|
||
"data": json_base64,
|
||
"size": file_size,
|
||
"format": "JSON",
|
||
"json_data": fabric_json # 添加原始JSON数据
|
||
}
|
||
|
||
except Exception as e:
|
||
logger.error(f"生成Fabric.js JSON文件时发生错误: {e}", exc_info=True)
|
||
return None
|
||
|
||
def _get_json_object_count(self, json_path: str) -> Optional[int]:
|
||
"""获取Fabric.js JSON文件的对象数量"""
|
||
try:
|
||
with open(json_path, 'r', encoding='utf-8') as f:
|
||
fabric_data = json.load(f)
|
||
return len(fabric_data.get('objects', []))
|
||
except Exception as e:
|
||
logger.warning(f"获取JSON对象数量失败: {e}")
|
||
return None
|
||
|
||
def _generate_fabric_json(self, content: Dict[str, Any], template_id: str, image_size: List[int], images: Image.Image = None) -> Dict[str, Any]:
|
||
"""
|
||
生成支持多级分层的Fabric.js JSON格式
|
||
|
||
Args:
|
||
content: 海报内容数据
|
||
template_id: 模板ID
|
||
image_size: 图像尺寸 [width, height]
|
||
images: 用户上传的图片
|
||
|
||
Returns:
|
||
Dict: 支持多级分层的Fabric.js JSON格式数据
|
||
"""
|
||
try:
|
||
fabric_objects = []
|
||
|
||
# 基础画布尺寸
|
||
canvas_width, canvas_height = image_size[0], image_size[1]
|
||
|
||
# 1. 图片层组 (最底层 - 用户上传的图片)
|
||
image_group = self._create_image_layer(images, canvas_width, canvas_height)
|
||
fabric_objects.append(image_group)
|
||
|
||
# 2. 背景层组 (第二层)
|
||
background_group = self._create_background_layer(canvas_width, canvas_height, template_id)
|
||
fabric_objects.append(background_group)
|
||
|
||
# 3. 内容层组 (中间层)
|
||
content_group = self._create_content_layer(content, canvas_width, canvas_height)
|
||
fabric_objects.append(content_group)
|
||
|
||
# 4. 装饰层组 (顶层)
|
||
decoration_group = self._create_decoration_layer(content, canvas_width, canvas_height)
|
||
fabric_objects.append(decoration_group)
|
||
|
||
# 构建完整的Fabric.js JSON
|
||
fabric_json = {
|
||
"version": "5.3.0",
|
||
"objects": fabric_objects,
|
||
"background": "transparent",
|
||
"backgroundImage": None,
|
||
"overlayImage": None,
|
||
"clipPath": None,
|
||
"width": canvas_width,
|
||
"height": canvas_height,
|
||
"viewportTransform": [1, 0, 0, 1, 0, 0],
|
||
"backgroundVpt": True,
|
||
"overlayVpt": True,
|
||
"selection": True,
|
||
"preserveObjectStacking": True,
|
||
"snapAngle": 0,
|
||
"snapThreshold": 10,
|
||
"centeredScaling": False,
|
||
"centeredRotation": True,
|
||
"interactive": True,
|
||
"skipTargetFind": False,
|
||
"enableRetinaScaling": True,
|
||
"imageSmoothingEnabled": True,
|
||
"perPixelTargetFind": False,
|
||
"targetFindTolerance": 0,
|
||
"skipOffscreen": True,
|
||
"includeDefaultValues": True
|
||
}
|
||
|
||
logger.info(f"成功生成多级分层Fabric.js JSON，包含 {len(fabric_objects)} 个层组")
|
||
return fabric_json
|
||
|
||
except Exception as e:
|
||
logger.error(f"生成Fabric.js JSON失败: {e}")
|
||
return {
|
||
"version": "5.3.0",
|
||
"objects": [],
|
||
"background": "transparent",
|
||
"width": image_size[0],
|
||
"height": image_size[1]
|
||
}
|
||
|
||
def _create_image_layer(self, images: Image.Image, canvas_width: int, canvas_height: int) -> Dict[str, Any]:
|
||
"""创建图片层组（最底层）"""
|
||
image_objects = []
|
||
|
||
if images and hasattr(images, 'width'):
|
||
# 将PIL图像转换为base64以便在Fabric.js中使用
|
||
image_base64 = self._image_to_base64(images)
|
||
|
||
# 计算图片的缩放比例，保持宽高比
|
||
image_width, image_height = images.width, images.height
|
||
scale_x = canvas_width / image_width
|
||
scale_y = canvas_height / image_height
|
||
scale = min(scale_x, scale_y) # 保持宽高比的适应缩放
|
||
|
||
# 计算居中位置
|
||
scaled_width = image_width * scale
|
||
scaled_height = image_height * scale
|
||
left = (canvas_width - scaled_width) / 2
|
||
top = (canvas_height - scaled_height) / 2
|
||
|
||
image_objects.append({
|
||
"type": "image",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": left,
|
||
"top": top,
|
||
"width": image_width,
|
||
"height": image_height,
|
||
"scaleX": scale,
|
||
"scaleY": scale,
|
||
"angle": 0,
|
||
"flipX": False,
|
||
"flipY": False,
|
||
"opacity": 1,
|
||
"visible": True,
|
||
"src": f"data:image/png;base64,{image_base64}",
|
||
"crossOrigin": "anonymous",
|
||
"name": "user_uploaded_image",
|
||
"data": {
|
||
"type": "user_image",
|
||
"replaceable": True,
|
||
"original_size": [image_width, image_height],
|
||
"scale_ratio": scale
|
||
},
|
||
"selectable": True,
|
||
"evented": True,
|
||
"moveCursor": "move",
|
||
"cornerStyle": "circle",
|
||
"cornerSize": 12,
|
||
"transparentCorners": False,
|
||
"cornerColor": "#4dabf7",
|
||
"cornerStrokeColor": "#ffffff",
|
||
"borderColor": "#4dabf7",
|
||
"borderScaleFactor": 2
|
||
})
|
||
else:
|
||
# 如果没有图片，创建一个占位符
|
||
image_objects.append({
|
||
"type": "rect",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 0,
|
||
"width": canvas_width,
|
||
"height": canvas_height,
|
||
"fill": "#f8f9fa",
|
||
"stroke": "#dee2e6",
|
||
"strokeWidth": 2,
|
||
"strokeDashArray": [10, 5],
|
||
"name": "image_placeholder",
|
||
"data": {
|
||
"type": "placeholder",
|
||
"replaceable": True,
|
||
"placeholder_text": "点击上传图片"
|
||
},
|
||
"selectable": True,
|
||
"evented": True
|
||
})
|
||
|
||
return {
|
||
"type": "group",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 0,
|
||
"width": canvas_width,
|
||
"height": canvas_height,
|
||
"angle": 0,
|
||
"scaleX": 1,
|
||
"scaleY": 1,
|
||
"flipX": False,
|
||
"flipY": False,
|
||
"opacity": 1,
|
||
"visible": True,
|
||
"name": "image_layer",
|
||
"data": {"layer": "image", "level": 0, "replaceable": True},
|
||
"objects": image_objects,
|
||
"selectable": False,
|
||
"evented": True
|
||
}
|
||
|
||
def _create_background_layer(self, canvas_width: int, canvas_height: int, template_id: str) -> Dict[str, Any]:
|
||
"""创建背景层组"""
|
||
background_objects = []
|
||
|
||
# 主背景
|
||
background_objects.append({
|
||
"type": "rect",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 0,
|
||
"width": canvas_width,
|
||
"height": canvas_height,
|
||
"fill": "transparent",
|
||
"stroke": None,
|
||
"name": "main_background",
|
||
"selectable": False,
|
||
"evented": False
|
||
})
|
||
|
||
# 渐变背景（可选）
|
||
if template_id:
|
||
background_objects.append({
|
||
"type": "rect",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 0,
|
||
"width": canvas_width,
|
||
"height": canvas_height,
|
||
"fill": {
|
||
"type": "linear",
|
||
"coords": {
|
||
"x1": 0,
|
||
"y1": 0,
|
||
"x2": 0,
|
||
"y2": canvas_height
|
||
},
|
||
"colorStops": [
|
||
{"offset": 0, "color": "#ffffff", "opacity": 0.8},
|
||
{"offset": 1, "color": "#f8f9fa", "opacity": 0.9}
|
||
]
|
||
},
|
||
"name": "gradient_background",
|
||
"selectable": False,
|
||
"evented": False
|
||
})
|
||
|
||
return {
|
||
"type": "group",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 0,
|
||
"width": canvas_width,
|
||
"height": canvas_height,
|
||
"angle": 0,
|
||
"scaleX": 1,
|
||
"scaleY": 1,
|
||
"flipX": False,
|
||
"flipY": False,
|
||
"opacity": 1,
|
||
"visible": True,
|
||
"name": "background_layer",
|
||
"data": {"layer": "background", "level": 1},
|
||
"objects": background_objects,
|
||
"selectable": False,
|
||
"evented": False
|
||
}
|
||
|
||
def _create_content_layer(self, content: Dict[str, Any], canvas_width: int, canvas_height: int) -> Dict[str, Any]:
|
||
"""创建内容层组，包含多个子分层"""
|
||
content_objects = []
|
||
|
||
# 标题组
|
||
title_group = self._create_title_group(content, canvas_width)
|
||
if title_group["objects"]:
|
||
content_objects.append(title_group)
|
||
|
||
# 正文组
|
||
body_group = self._create_body_group(content, canvas_width)
|
||
if body_group["objects"]:
|
||
content_objects.append(body_group)
|
||
|
||
# 价格信息组
|
||
price_group = self._create_price_group(content, canvas_width)
|
||
if price_group["objects"]:
|
||
content_objects.append(price_group)
|
||
|
||
return {
|
||
"type": "group",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 0,
|
||
"width": canvas_width,
|
||
"height": canvas_height,
|
||
"angle": 0,
|
||
"scaleX": 1,
|
||
"scaleY": 1,
|
||
"flipX": False,
|
||
"flipY": False,
|
||
"opacity": 1,
|
||
"visible": True,
|
||
"name": "content_layer",
|
||
"data": {"layer": "content", "level": 2},
|
||
"objects": content_objects
|
||
}
|
||
|
||
def _create_title_group(self, content: Dict[str, Any], canvas_width: int) -> Dict[str, Any]:
|
||
"""创建标题分组"""
|
||
title_objects = []
|
||
|
||
# 主标题
|
||
if content.get('title'):
|
||
title_objects.append({
|
||
"type": "textbox",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 50,
|
||
"top": 80,
|
||
"width": canvas_width - 100,
|
||
"height": 80,
|
||
"fill": "#2c3e50",
|
||
"fontFamily": "Arial, sans-serif",
|
||
"fontWeight": "bold",
|
||
"fontSize": 48,
|
||
"text": str(content['title']),
|
||
"textAlign": "center",
|
||
"name": "main_title",
|
||
"data": {"type": "title", "priority": "high"}
|
||
})
|
||
|
||
# 副标题
|
||
if content.get('slogan'):
|
||
title_objects.append({
|
||
"type": "textbox",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 50,
|
||
"top": 170,
|
||
"width": canvas_width - 100,
|
||
"height": 40,
|
||
"fill": "#7f8c8d",
|
||
"fontFamily": "Arial, sans-serif",
|
||
"fontWeight": "normal",
|
||
"fontSize": 24,
|
||
"text": str(content['slogan']),
|
||
"textAlign": "center",
|
||
"name": "subtitle",
|
||
"data": {"type": "subtitle", "priority": "medium"}
|
||
})
|
||
|
||
return {
|
||
"type": "group",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 0,
|
||
"width": canvas_width,
|
||
"height": 250,
|
||
"name": "title_group",
|
||
"data": {"section": "title", "level": 3},
|
||
"objects": title_objects
|
||
}
|
||
|
||
def _create_body_group(self, content: Dict[str, Any], canvas_width: int) -> Dict[str, Any]:
|
||
"""创建正文分组"""
|
||
body_objects = []
|
||
|
||
if content.get('content'):
|
||
text_content = content['content']
|
||
if isinstance(text_content, list):
|
||
text_content = '\n'.join(text_content)
|
||
|
||
body_objects.append({
|
||
"type": "textbox",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 50,
|
||
"top": 280,
|
||
"width": canvas_width - 100,
|
||
"height": 120,
|
||
"fill": "#34495e",
|
||
"fontFamily": "Arial, sans-serif",
|
||
"fontWeight": "normal",
|
||
"fontSize": 18,
|
||
"text": str(text_content),
|
||
"textAlign": "left",
|
||
"lineHeight": 1.4,
|
||
"name": "main_content",
|
||
"data": {"type": "content", "priority": "medium"}
|
||
})
|
||
|
||
return {
|
||
"type": "group",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 250,
|
||
"width": canvas_width,
|
||
"height": 150,
|
||
"name": "body_group",
|
||
"data": {"section": "body", "level": 3},
|
||
"objects": body_objects
|
||
}
|
||
|
||
def _create_price_group(self, content: Dict[str, Any], canvas_width: int) -> Dict[str, Any]:
|
||
"""创建价格信息分组"""
|
||
price_objects = []
|
||
|
||
if content.get('price'):
|
||
# 价格背景
|
||
price_objects.append({
|
||
"type": "rect",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 40,
|
||
"top": 420,
|
||
"width": canvas_width - 80,
|
||
"height": 80,
|
||
"fill": "#e74c3c",
|
||
"rx": 10,
|
||
"ry": 10,
|
||
"name": "price_background"
|
||
})
|
||
|
||
# 价格文字
|
||
price_objects.append({
|
||
"type": "textbox",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 50,
|
||
"top": 440,
|
||
"width": canvas_width - 100,
|
||
"height": 40,
|
||
"fill": "#ffffff",
|
||
"fontFamily": "Arial, sans-serif",
|
||
"fontWeight": "bold",
|
||
"fontSize": 36,
|
||
"text": str(content['price']),
|
||
"textAlign": "center",
|
||
"name": "price_text",
|
||
"data": {"type": "price", "priority": "high"}
|
||
})
|
||
|
||
return {
|
||
"type": "group",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 400,
|
||
"width": canvas_width,
|
||
"height": 100,
|
||
"name": "price_group",
|
||
"data": {"section": "price", "level": 3},
|
||
"objects": price_objects
|
||
}
|
||
|
||
def _create_decoration_layer(self, content: Dict[str, Any], canvas_width: int, canvas_height: int) -> Dict[str, Any]:
|
||
"""创建装饰层组"""
|
||
decoration_objects = []
|
||
|
||
# 装饰边框
|
||
decoration_objects.append({
|
||
"type": "rect",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 20,
|
||
"top": 20,
|
||
"width": canvas_width - 40,
|
||
"height": canvas_height - 40,
|
||
"fill": "transparent",
|
||
"stroke": "#3498db",
|
||
"strokeWidth": 3,
|
||
"strokeDashArray": [10, 5],
|
||
"name": "decoration_border",
|
||
"selectable": False
|
||
})
|
||
|
||
# 角落装饰
|
||
decoration_objects.append({
|
||
"type": "circle",
|
||
"version": "5.3.0",
|
||
"originX": "center",
|
||
"originY": "center",
|
||
"left": canvas_width - 50,
|
||
"top": 50,
|
||
"radius": 20,
|
||
"fill": "#f39c12",
|
||
"name": "corner_decoration",
|
||
"selectable": False
|
||
})
|
||
|
||
return {
|
||
"type": "group",
|
||
"version": "5.3.0",
|
||
"originX": "left",
|
||
"originY": "top",
|
||
"left": 0,
|
||
"top": 0,
|
||
"width": canvas_width,
|
||
"height": canvas_height,
|
||
"angle": 0,
|
||
"scaleX": 1,
|
||
"scaleY": 1,
|
||
"flipX": False,
|
||
"flipY": False,
|
||
"opacity": 1,
|
||
"visible": True,
|
||
"name": "decoration_layer",
|
||
"data": {"layer": "decoration", "level": 3},
|
||
"objects": decoration_objects,
|
||
"selectable": False
|
||
}
|
||
|
||
|