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Aherobo Ovie Victor
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# Standards management
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import json
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import os
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from typing import Dict, List, Optional, BinaryIO, Tuple
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import uuid
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from loguru import logger
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from app.core.models import Standard, Requirement, RequirementSeverity
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from app.utils.helpers import load_standards_from_file
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from app.services.standards_matcher import StandardsMatcher
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# Singleton instance to ensure all parts of the application use the same standards
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_standards_service_instance = None
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class StandardsService:
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"""Service for managing compliance standards."""
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def __new__(cls):
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"""Implement singleton pattern to ensure all parts of the app use the same standards."""
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global _standards_service_instance
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if _standards_service_instance is None:
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_standards_service_instance = super(StandardsService, cls).__new__(cls)
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_standards_service_instance.standards = {} # In-memory storage for standards
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_standards_service_instance.matcher = StandardsMatcher() # Advanced standards matching logic
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_standards_service_instance._load_default_standards()
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return _standards_service_instance
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def __init__(self):
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"""Initialize the standards service."""
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# Initialization is done in __new__ for the singleton pattern
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def _load_default_standards(self):
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"""Load default standards from the standards directory."""
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standards_dir = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), "standard")
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if not os.path.exists(standards_dir):
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logger.warning(f"Standards directory not found: {standards_dir}")
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return
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for filename in os.listdir(standards_dir):
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if filename.endswith(".json"):
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try:
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file_path = os.path.join(standards_dir, filename)
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standards_data = load_standards_from_file(file_path)
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if "standards" in standards_data:
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for std_data in standards_data["standards"]:
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standard = self._create_standard_from_data(std_data)
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self.standards[standard.id] = standard
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logger.info(f"Loaded standard: {standard.name} ({standard.id})")
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except Exception as e:
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logger.error(f"Error loading standard from {filename}: {str(e)}")
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def _create_standard_from_data(self, data: Dict) -> Standard:
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"""
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Create a Standard object from dictionary data.
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Args:
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data: Dictionary containing standard data
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Returns:
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Standard object
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"""
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requirements = []
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if "requirements" in data:
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for req_data in data["requirements"]:
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# Map severity string to RequirementSeverity enum
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severity_str = req_data.get("severity", "minor").lower()
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if severity_str == "critical":
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severity = RequirementSeverity.CRITICAL
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elif severity_str == "major":
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severity = RequirementSeverity.MAJOR
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elif severity_str == "info":
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severity = RequirementSeverity.INFO
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else:
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severity = RequirementSeverity.MINOR
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requirement = Requirement(
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id=req_data.get("id", str(uuid.uuid4())),
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description=req_data.get("description", ""),
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severity=severity,
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details=req_data.get("details", None)
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)
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requirements.append(requirement)
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return Standard(
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id=data.get("id", str(uuid.uuid4())),
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name=data.get("name", "Unnamed Standard"),
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description=data.get("description", ""),
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requirements=requirements
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)
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async def get_all_standards(self) -> List[Standard]:
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"""
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Get all available standards.
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Returns:
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List of Standard objects
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"""
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return list(self.standards.values())
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async def get_standard(self, standard_id: str) -> Optional[Standard]:
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"""
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Get a standard by ID.
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Args:
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standard_id: ID of the standard to retrieve
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Returns:
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Standard object if found, None otherwise
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"""
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return self.standards.get(standard_id)
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async def get_standard_by_name(self, name: str) -> Optional[Standard]:
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"""
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Get a standard by name (case-insensitive).
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Args:
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name: Name of the standard to retrieve
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Returns:
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Standard object if found, None otherwise
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"""
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name_lower = name.lower()
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for standard in self.standards.values():
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if standard.name.lower() == name_lower:
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return standard
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return None
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async def upload_standard(self, file: BinaryIO, filename: str) -> Standard:
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"""
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Upload and process a standard definition file.
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Args:
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file: The standard definition file (JSON)
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filename: Name of the uploaded file
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Returns:
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Standard object
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"""
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try:
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# Read file content
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content = await self._read_file_content(file)
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# Parse JSON
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data = json.loads(content)
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if "standards" in data and isinstance(data["standards"], list):
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# Multiple standards in file
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standards = []
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for std_data in data["standards"]:
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standard = self._create_standard_from_data(std_data)
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self.standards[standard.id] = standard
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standards.append(standard)
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logger.info(f"Uploaded standard: {standard.name} (ID: {standard.id}) with {len(standard.requirements)} requirements")
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# Log the current standards count after upload
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logger.info(f"Total standards in system after upload: {len(self.standards)}")
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# Return the first standard for simplicity
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return standards[0] if standards else None
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else:
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# Single standard in file
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standard = self._create_standard_from_data(data)
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self.standards[standard.id] = standard
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logger.info(f"Uploaded standard: {standard.name} (ID: {standard.id}) with {len(standard.requirements)} requirements")
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# Log the current standards count after upload
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logger.info(f"Total standards in system after upload: {len(self.standards)}")
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return standard
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except json.JSONDecodeError:
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raise ValueError("Invalid JSON format in standard definition file")
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except Exception as e:
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logger.error(f"Error processing standard file: {str(e)}")
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raise
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async def _read_file_content(self, file: BinaryIO) -> str:
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"""
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Read and decode file content.
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Args:
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file: The file to read
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Returns:
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File content as string
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"""
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file_content = file.read()
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# Try to decode as UTF-8
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try:
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return file_content.decode('utf-8')
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except UnicodeDecodeError:
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# Try other encodings if UTF-8 fails
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try:
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return file_content.decode('latin-1')
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except:
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raise ValueError("Unable to decode file content. Please ensure file is text-based.")
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async def get_standard_names_for_document(self, document_content: str) -> List[str]:
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"""
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Identify which standards might be relevant for a document based on content.
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Uses advanced matching logic to find the most relevant standards.
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Args:
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document_content: The document content
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Returns:
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List of standard names that might be relevant
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"""
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# Default standards to use if no matches are found
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DEFAULT_STANDARDS = ["ISO-9001", "IEEE-829", "RFC-2119"]
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# Log available standards for debugging
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logger.info(f"Available standards in the system: {len(self.standards)}")
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for std_id, std in self.standards.items():
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logger.info(f" - {std.name} (ID: {std_id})")
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# If no standards are available, return defaults
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if not self.standards:
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logger.warning("No standards available in the system. Using default standards.")
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return DEFAULT_STANDARDS
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# Use the standards matcher to find relevant standards
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standard_scores = self.matcher.find_relevant_standards(
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document_content=document_content,
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standards=list(self.standards.values()),
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threshold=0.1, # Minimum relevance threshold
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max_standards=5 # Maximum number of standards to return
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)
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# Log the matching results
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if standard_scores:
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logger.info(f"Found {len(standard_scores)} relevant standards:")
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for name, score in standard_scores:
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logger.info(f" - {name}: relevance score {score:.2f}")
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else:
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logger.info("No relevant standards found based on document content.")
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# Extract standard names from the results
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relevant_standards = [std[0] for std in standard_scores]
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# If no relevant standards found, use defaults
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if not relevant_standards:
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logger.info(f"Using default standards: {DEFAULT_STANDARDS}")
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return DEFAULT_STANDARDS
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return relevant_standards
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