feat(models,utils): implement data models and utility classes

lsfx-mock-server/utils/error_simulator.py

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+from typing import Dict, Optional
+import re
+
+
+class ErrorSimulator:
+    """错误场景模拟器"""
+
+    # 错误码映射表
+    ERROR_CODES = {
+        "40101": {"code": "40101", "message": "appId错误"},
+        "40102": {"code": "40102", "message": "appSecretCode错误"},
+        "40104": {"code": "40104", "message": "可使用项目次数为0，无法创建项目"},
+        "40105": {"code": "40105", "message": "只读模式下无法新建项目"},
+        "40106": {"code": "40106", "message": "错误的分析类型，不在规定的取值范围内"},
+        "40107": {"code": "40107", "message": "当前系统不支持的分析类型"},
+        "40108": {"code": "40108", "message": "当前用户所属行社无权限"},
+        "501014": {"code": "501014", "message": "无行内流水文件"},
+    }
+
+    @staticmethod
+    def detect_error_marker(value: str) -> Optional[str]:
+        """检测字符串中的错误标记
+
+        规则：如果字符串包含 error_XXXX，则返回 XXXX
+        例如：
+        - "project_error_40101" -> "40101"
+        - "test_error_501014" -> "501014"
+        """
+        if not value:
+            return None
+
+        pattern = r'error_(\d+)'
+        match = re.search(pattern, value)
+        if match:
+            return match.group(1)
+        return None
+
+    @staticmethod
+    def build_error_response(error_code: str) -> Optional[Dict]:
+        """构建错误响应"""
+        if error_code in ErrorSimulator.ERROR_CODES:
+            error_info = ErrorSimulator.ERROR_CODES[error_code]
+            return {
+                "code": error_info["code"],
+                "message": error_info["message"],
+                "status": error_info["code"],
+                "successResponse": False
+            }
+        return None