413 lines
14 KiB
Python
413 lines
14 KiB
Python
"""平台规则引擎 - 各内容平台的规则和最佳实践"""
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import re
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PLATFORM_RULES: dict[str, dict] = {
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"wechat": {
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"name": "微信公众号",
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"icon": "wechat",
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"max_title_length": 22,
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"max_content_length": 20000,
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"min_content_length": 300,
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"supported_media": ["image", "video", "audio"],
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"max_images": 20,
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"best_publish_times": ["07:30-08:30", "11:30-12:30", "17:30-18:30", "20:30-22:00"],
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"best_publish_days": ["周二", "周四", "周六"],
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"format_features": {
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"supports_markdown": False,
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"supports_html": True,
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"max_heading_level": 3,
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"supports_code_block": True,
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},
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"rules": [
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"不得使用诱导分享/关注语句",
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"图片单张不超过10MB",
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"标题不含连续特殊符号（如!!!）",
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"正文不含外部链接（仅支持公众号链接和小程序）",
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"不得包含未经授权的商标/品牌名称",
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],
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"seo_tips": [
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"首段包含核心关键词",
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"使用小标题分段（适配搜一搜）",
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"文末设置话题标签",
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"摘要控制在120字内",
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],
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},
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"zhihu": {
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"name": "知乎",
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"icon": "zhihu",
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"max_title_length": 30,
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"max_content_length": 50000,
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"min_content_length": 500,
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"supported_media": ["image", "video"],
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"max_images": 50,
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"best_publish_times": ["09:00-10:00", "14:00-15:00", "20:00-22:00"],
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"best_publish_days": ["周一", "周三", "周五"],
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"format_features": {
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"supports_markdown": True,
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"supports_html": False,
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"max_heading_level": 4,
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"supports_code_block": True,
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},
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"rules": [
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"回答需针对问题本身",
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"不得过度营销或硬广",
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"引用需标注来源",
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"不得使用AI水文（内容需有信息增量）",
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],
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"seo_tips": [
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"回答开头直接给出结论",
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"使用数据和案例支撑",
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"合理设置二级标题",
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"文末引导关注专栏",
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],
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},
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"xiaohongshu": {
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"name": "小红书",
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"icon": "xiaohongshu",
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"max_title_length": 20,
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"max_content_length": 1000,
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"min_content_length": 100,
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"supported_media": ["image", "video"],
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"max_images": 18,
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"best_publish_times": ["07:00-09:00", "12:00-13:00", "18:00-20:00", "21:00-23:00"],
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"best_publish_days": ["周末", "周三"],
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"format_features": {
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"supports_markdown": False,
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"supports_html": False,
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"max_heading_level": 0,
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"supports_code_block": False,
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"supports_emoji": True,
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},
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"rules": [
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"首图质量决定点击率",
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"正文控制在300-800字",
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"话题标签3-8个",
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"不得出现其他平台引流信息",
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"图片不含水印",
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],
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"seo_tips": [
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"标题含数字更吸引点击",
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"正文用短句+emoji分段",
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"话题标签放文末",
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"首句即核心观点",
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],
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},
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"baijiahao": {
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"name": "百家号",
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"icon": "baidu",
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"max_title_length": 30,
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"max_content_length": 30000,
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"min_content_length": 800,
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"supported_media": ["image", "video"],
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"max_images": 30,
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"best_publish_times": ["08:00-09:00", "11:00-12:00", "17:00-18:00"],
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"best_publish_days": ["工作日"],
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"format_features": {
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"supports_markdown": False,
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"supports_html": True,
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"max_heading_level": 3,
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"supports_code_block": False,
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},
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"rules": [
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"原创内容优先推荐",
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"标题不含夸张/标题党词汇",
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"正文需含至少1张配图",
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"不得搬运/洗稿",
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],
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"seo_tips": [
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"标题包含百度搜索热词",
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"文章结构化（H2小标题）",
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"适当添加内链",
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"发布后及时答复评论",
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],
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},
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"douyin": {
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"name": "抖音",
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"icon": "douyin",
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"max_title_length": 55,
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"max_content_length": 5000,
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"min_content_length": 0,
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"supported_media": ["video", "image"],
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"max_images": 35,
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"best_publish_times": ["06:00-08:00", "12:00-13:00", "18:00-20:00", "22:00-23:00"],
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"best_publish_days": ["每天"],
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"format_features": {
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"supports_markdown": False,
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"supports_html": False,
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"max_heading_level": 0,
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"supports_code_block": False,
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"supports_emoji": True,
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},
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"rules": [
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"视频/图文需原创",
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"不得含其他平台水印",
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"话题标签2-5个",
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"文案简短有吸引力",
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],
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"seo_tips": [
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"前3秒决定完播率",
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"标题含热点关键词",
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"评论区互动提升权重",
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"合适的话题+POI定位",
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],
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},
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"toutiao": {
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"name": "今日头条",
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"icon": "toutiao",
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"max_title_length": 30,
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"max_content_length": 30000,
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"min_content_length": 500,
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"supported_media": ["image", "video"],
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"max_images": 30,
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"best_publish_times": ["07:00-08:00", "12:00-13:00", "18:00-19:00", "21:00-22:00"],
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"best_publish_days": ["每天"],
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"format_features": {
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"supports_markdown": False,
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"supports_html": True,
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"max_heading_level": 3,
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"supports_code_block": False,
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},
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"rules": [
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"标题不得标题党",
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"内容需有信息价值",
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"首发原创优先推荐",
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"配图清晰不模糊",
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],
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"seo_tips": [
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"标题含核心关键词",
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"文章1500字以上推荐更高",
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"合理使用头条话题",
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"发布频率稳定提升权重",
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],
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},
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}
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# 诱导分享/关注关键词
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_INDUCING_PATTERNS = re.compile(
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r"(转发|分享|关注|点赞|收藏).{0,4}(领|获|得|拿|解锁|免费)",
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re.IGNORECASE,
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)
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# 连续特殊符号
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_CONSECUTIVE_SYMBOLS = re.compile(r"[!！?？]{3,}")
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# 外部链接（排除公众号和小程序链接）
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_EXTERNAL_LINK = re.compile(
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r"https?://(?!mp\.weixin\.qq\.com|wx\.qq\.com|weixin://)[^\s<>)）]+",
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re.IGNORECASE,
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)
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# 标题党关键词
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_CLICKBAIT_WORDS = {"震惊", "惊呆", "吓死", "笑死", "疯传", "刷屏", "出大事", "不敢相信"}
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# 水印检测（简化：检测常见平台水印文本）
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_WATERMARK_PATTERNS = re.compile(
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r"(抖音|快手|小红书|微博|B站|bilibili).*(水印|logo)",
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re.IGNORECASE,
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)
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class PlatformRuleEngine:
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"""平台规则引擎"""
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def get_platforms(self) -> list[dict]:
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"""获取所有支持平台列表"""
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return [
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{
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"id": key,
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"name": val["name"],
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"icon": val["icon"],
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"max_title_length": val["max_title_length"],
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"max_content_length": val["max_content_length"],
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"min_content_length": val["min_content_length"],
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"supported_media": val["supported_media"],
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"max_images": val["max_images"],
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}
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for key, val in PLATFORM_RULES.items()
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]
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def get_platform_rules(self, platform: str) -> dict | None:
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"""获取指定平台的完整规则"""
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return PLATFORM_RULES.get(platform)
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def validate_content(self, content: str, title: str, platform: str) -> dict:
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"""
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校验内容是否符合平台规则
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返回: {
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"is_valid": bool,
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"score": int (0-100),
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"issues": [{"severity": "high|medium|low", "message": "..."}],
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"passed": ["规则1", "规则2"]
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}
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"""
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rules = PLATFORM_RULES.get(platform)
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if rules is None:
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return {
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"is_valid": False,
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"score": 0,
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"issues": [{"severity": "high", "message": f"不支持的平台: {platform}"}],
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"passed": [],
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}
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issues: list[dict] = []
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passed: list[str] = []
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# --- 标题长度 ---
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title_len = len(title)
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max_title = rules["max_title_length"]
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if title_len > max_title:
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issues.append({
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"severity": "high",
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"message": f"标题长度 {title_len} 超过限制 {max_title}",
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})
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else:
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passed.append(f"标题长度合规（{title_len}/{max_title}）")
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# --- 内容长度 ---
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content_len = len(content)
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max_content = rules["max_content_length"]
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min_content = rules["min_content_length"]
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if content_len > max_content:
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issues.append({
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"severity": "high",
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"message": f"内容长度 {content_len} 超过限制 {max_content}",
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})
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elif min_content > 0 and content_len < min_content:
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issues.append({
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"severity": "medium",
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"message": f"内容长度 {content_len} 低于建议最低 {min_content}",
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})
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else:
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passed.append(f"内容长度合规（{content_len}/{max_content}）")
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# --- 平台特有规则 ---
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platform_specific = self._validate_platform_specific(content, title, platform)
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issues.extend(platform_specific["issues"])
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passed.extend(platform_specific["passed"])
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# --- 计算分数 ---
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total_checks = len(issues) + len(passed)
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if total_checks == 0:
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score = 100
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else:
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# high=扣15分, medium=扣8分, low=扣3分
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penalty = sum(
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15 if i["severity"] == "high" else 8 if i["severity"] == "medium" else 3
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for i in issues
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)
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score = max(0, 100 - penalty)
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return {
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"is_valid": len([i for i in issues if i["severity"] == "high"]) == 0,
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"score": score,
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"issues": issues,
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"passed": passed,
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}
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def _validate_platform_specific(
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self, content: str, title: str, platform: str
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) -> dict:
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"""平台特定规则校验"""
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issues: list[dict] = []
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passed: list[str] = []
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if platform == "wechat":
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# 诱导分享/关注
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if _INDUCING_PATTERNS.search(title) or _INDUCING_PATTERNS.search(content):
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issues.append({
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"severity": "high",
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"message": "包含诱导分享/关注语句",
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})
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else:
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passed.append("无诱导分享/关注语句")
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# 连续特殊符号
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if _CONSECUTIVE_SYMBOLS.search(title):
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issues.append({
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"severity": "medium",
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"message": "标题包含连续特殊符号",
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})
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else:
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passed.append("标题无连续特殊符号")
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# 外部链接
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if _EXTERNAL_LINK.search(content):
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issues.append({
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"severity": "high",
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"message": "正文包含外部链接（仅支持公众号链接和小程序）",
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})
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else:
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passed.append("无外部链接")
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elif platform == "zhihu":
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# 营销内容检测（简化）
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marketing_words = {"购买", "下单", "优惠价", "限时折扣", "点击购买"}
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found_marketing = marketing_words & set(content)
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if found_marketing:
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issues.append({
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"severity": "medium",
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"message": f"疑似营销用语: {', '.join(found_marketing)}",
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})
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else:
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passed.append("未检测到过度营销用语")
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elif platform == "xiaohongshu":
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# 字数建议
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content_len = len(content)
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if content_len > 800:
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issues.append({
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"severity": "medium",
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"message": f"正文建议300-800字，当前 {content_len} 字",
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})
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elif content_len < 300:
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issues.append({
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"severity": "low",
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"message": f"正文建议300-800字，当前仅 {content_len} 字",
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})
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else:
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passed.append(f"正文字数适宜（{content_len}字）")
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# 其他平台引流
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cross_platform_keywords = ["微信", "公众号", "抖音号", "微博"]
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found_cross = [p for p in cross_platform_keywords if p in content]
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if found_cross:
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issues.append({
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"severity": "high",
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"message": f"疑似其他平台引流: {', '.join(found_cross)}",
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})
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else:
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passed.append("未检测到其他平台引流信息")
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elif platform in ("baijiahao", "toutiao"):
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# 标题党检测
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found_clickbait = _CLICKBAIT_WORDS & set(title)
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if found_clickbait:
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issues.append({
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"severity": "high",
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"message": f"标题含标题党词汇: {', '.join(found_clickbait)}",
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})
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else:
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passed.append("标题无标题党词汇")
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elif platform == "douyin":
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# 水印检测
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if _WATERMARK_PATTERNS.search(content):
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issues.append({
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"severity": "high",
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"message": "内容包含其他平台水印信息",
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})
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else:
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passed.append("未检测到其他平台水印")
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return {"issues": issues, "passed": passed}
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def get_optimization_tips(self, platform: str) -> list[str]:
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"""获取平台优化建议"""
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rules = PLATFORM_RULES.get(platform)
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if rules is None:
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return []
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return rules.get("seo_tips", [])
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