306 lines
9.5 KiB
Python
306 lines
9.5 KiB
Python
"""
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Project context management.
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Persists project state on the server side so the frontend does not need to
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shuttle large amounts of data between API calls.
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"""
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import os
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import json
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import uuid
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import shutil
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from datetime import datetime
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from typing import Dict, Any, List, Optional
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from enum import Enum
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from dataclasses import dataclass, field, asdict
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from ..config import Config
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class ProjectStatus(str, Enum):
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"""Project lifecycle status."""
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CREATED = "created" # just created, files uploaded
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ONTOLOGY_GENERATED = "ontology_generated" # ontology has been generated
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GRAPH_BUILDING = "graph_building" # graph is being built
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GRAPH_COMPLETED = "graph_completed" # graph build complete
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FAILED = "failed" # failed
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@dataclass
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class Project:
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"""Project data model."""
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project_id: str
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name: str
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status: ProjectStatus
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created_at: str
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updated_at: str
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# File metadata
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files: List[Dict[str, str]] = field(default_factory=list) # [{filename, path, size}]
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total_text_length: int = 0
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# Ontology info (populated after endpoint 1)
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ontology: Optional[Dict[str, Any]] = None
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analysis_summary: Optional[str] = None
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# Graph info (populated after endpoint 2 completes)
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graph_id: Optional[str] = None
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graph_build_task_id: Optional[str] = None
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# Configuration
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simulation_requirement: Optional[str] = None
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chunk_size: int = 500
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chunk_overlap: int = 50
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# Error information
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error: Optional[str] = None
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def to_dict(self) -> Dict[str, Any]:
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"""Convert to a plain dictionary."""
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return {
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"project_id": self.project_id,
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"name": self.name,
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"status": self.status.value if isinstance(self.status, ProjectStatus) else self.status,
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"created_at": self.created_at,
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"updated_at": self.updated_at,
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"files": self.files,
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"total_text_length": self.total_text_length,
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"ontology": self.ontology,
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"analysis_summary": self.analysis_summary,
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"graph_id": self.graph_id,
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"graph_build_task_id": self.graph_build_task_id,
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"simulation_requirement": self.simulation_requirement,
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"chunk_size": self.chunk_size,
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"chunk_overlap": self.chunk_overlap,
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"error": self.error
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}
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@classmethod
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def from_dict(cls, data: Dict[str, Any]) -> 'Project':
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"""Create a Project from a plain dictionary."""
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status = data.get('status', 'created')
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if isinstance(status, str):
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status = ProjectStatus(status)
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return cls(
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project_id=data['project_id'],
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name=data.get('name', 'Unnamed Project'),
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status=status,
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created_at=data.get('created_at', ''),
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updated_at=data.get('updated_at', ''),
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files=data.get('files', []),
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total_text_length=data.get('total_text_length', 0),
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ontology=data.get('ontology'),
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analysis_summary=data.get('analysis_summary'),
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graph_id=data.get('graph_id'),
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graph_build_task_id=data.get('graph_build_task_id'),
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simulation_requirement=data.get('simulation_requirement'),
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chunk_size=data.get('chunk_size', 500),
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chunk_overlap=data.get('chunk_overlap', 50),
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error=data.get('error')
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)
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class ProjectManager:
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"""Project manager - responsible for persistent storage and retrieval of projects."""
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# Project storage root directory
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PROJECTS_DIR = os.path.join(Config.UPLOAD_FOLDER, 'projects')
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@classmethod
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def _ensure_projects_dir(cls):
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"""Make sure the projects directory exists."""
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os.makedirs(cls.PROJECTS_DIR, exist_ok=True)
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@classmethod
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def _get_project_dir(cls, project_id: str) -> str:
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"""Get the directory path for a project."""
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return os.path.join(cls.PROJECTS_DIR, project_id)
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@classmethod
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def _get_project_meta_path(cls, project_id: str) -> str:
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"""Get the path to a project's metadata file."""
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return os.path.join(cls._get_project_dir(project_id), 'project.json')
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@classmethod
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def _get_project_files_dir(cls, project_id: str) -> str:
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"""Get the directory where a project's files are stored."""
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return os.path.join(cls._get_project_dir(project_id), 'files')
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@classmethod
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def _get_project_text_path(cls, project_id: str) -> str:
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"""Get the path to a project's extracted text."""
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return os.path.join(cls._get_project_dir(project_id), 'extracted_text.txt')
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@classmethod
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def create_project(cls, name: str = "Unnamed Project") -> Project:
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"""
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Create a new project.
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Args:
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name: project name.
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Returns:
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The newly created Project object.
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"""
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cls._ensure_projects_dir()
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project_id = f"proj_{uuid.uuid4().hex[:12]}"
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now = datetime.now().isoformat()
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project = Project(
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project_id=project_id,
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name=name,
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status=ProjectStatus.CREATED,
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created_at=now,
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updated_at=now
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)
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# Create the project directory structure
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project_dir = cls._get_project_dir(project_id)
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files_dir = cls._get_project_files_dir(project_id)
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os.makedirs(project_dir, exist_ok=True)
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os.makedirs(files_dir, exist_ok=True)
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# Persist the project metadata
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cls.save_project(project)
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return project
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@classmethod
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def save_project(cls, project: Project) -> None:
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"""Persist project metadata to disk."""
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project.updated_at = datetime.now().isoformat()
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meta_path = cls._get_project_meta_path(project.project_id)
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with open(meta_path, 'w', encoding='utf-8') as f:
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json.dump(project.to_dict(), f, ensure_ascii=False, indent=2)
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@classmethod
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def get_project(cls, project_id: str) -> Optional[Project]:
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"""
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Retrieve a project by ID.
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Args:
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project_id: project ID.
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Returns:
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The Project object, or None if it does not exist.
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"""
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meta_path = cls._get_project_meta_path(project_id)
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if not os.path.exists(meta_path):
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return None
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with open(meta_path, 'r', encoding='utf-8') as f:
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data = json.load(f)
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return Project.from_dict(data)
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@classmethod
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def list_projects(cls, limit: int = 50) -> List[Project]:
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"""
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List all projects.
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Args:
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limit: maximum number of results to return.
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Returns:
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A list of projects, sorted newest-first by creation time.
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"""
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cls._ensure_projects_dir()
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projects = []
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for project_id in os.listdir(cls.PROJECTS_DIR):
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project = cls.get_project(project_id)
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if project:
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projects.append(project)
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# Sort newest-first by creation time
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projects.sort(key=lambda p: p.created_at, reverse=True)
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return projects[:limit]
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@classmethod
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def delete_project(cls, project_id: str) -> bool:
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"""
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Delete a project and all of its files.
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Args:
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project_id: project ID.
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Returns:
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True if the project was deleted, False otherwise.
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"""
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project_dir = cls._get_project_dir(project_id)
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if not os.path.exists(project_dir):
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return False
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shutil.rmtree(project_dir)
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return True
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@classmethod
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def save_file_to_project(cls, project_id: str, file_storage, original_filename: str) -> Dict[str, str]:
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"""
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Save an uploaded file into the project's directory.
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Args:
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project_id: project ID.
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file_storage: Flask FileStorage object.
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original_filename: original filename.
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Returns:
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Dictionary with file metadata: {filename, path, size}.
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"""
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files_dir = cls._get_project_files_dir(project_id)
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os.makedirs(files_dir, exist_ok=True)
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# Build a safe filename
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ext = os.path.splitext(original_filename)[1].lower()
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safe_filename = f"{uuid.uuid4().hex[:8]}{ext}"
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file_path = os.path.join(files_dir, safe_filename)
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# Save the file
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file_storage.save(file_path)
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# Read back its size
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file_size = os.path.getsize(file_path)
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return {
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"original_filename": original_filename,
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"saved_filename": safe_filename,
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"path": file_path,
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"size": file_size
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}
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@classmethod
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def save_extracted_text(cls, project_id: str, text: str) -> None:
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"""Persist extracted text to disk."""
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text_path = cls._get_project_text_path(project_id)
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with open(text_path, 'w', encoding='utf-8') as f:
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f.write(text)
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@classmethod
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def get_extracted_text(cls, project_id: str) -> Optional[str]:
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"""Read extracted text from disk."""
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text_path = cls._get_project_text_path(project_id)
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if not os.path.exists(text_path):
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return None
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with open(text_path, 'r', encoding='utf-8') as f:
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return f.read()
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@classmethod
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def get_project_files(cls, project_id: str) -> List[str]:
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"""Return the absolute paths of all files in the project."""
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files_dir = cls._get_project_files_dir(project_id)
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if not os.path.exists(files_dir):
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return []
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return [
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os.path.join(files_dir, f)
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for f in os.listdir(files_dir)
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if os.path.isfile(os.path.join(files_dir, f))
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]
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