98 lines
3.8 KiB
Python
98 lines
3.8 KiB
Python
import os
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from datetime import datetime
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from crc import session
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from crc.api.common import ApiErrorSchema, ApiError
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from crc.models.file import FileType, FileDataModel, FileModelSchema, FileModel
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class FileService(object):
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"""Provides consistent management and rules for storing, retrieving and processing files."""
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DOCX_MIME = "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
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@staticmethod
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def add_workflow_spec_file(workflow_spec_id, name, content_type, binary_data):
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"""Create a new file and associate it with a workflow spec."""
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file_model = FileModel(
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version=0,
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workflow_spec_id=workflow_spec_id,
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name=name,
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)
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return FileService.update_file(file_model, binary_data, content_type)
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@staticmethod
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def add_form_field_file(study_id, workflow_id, task_id, form_field_key, name, content_type, binary_data):
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"""Create a new file and associate it with a user task form field within a workflow."""
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file_model = FileModel(
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version=0,
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study_id=study_id,
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workflow_id=workflow_id,
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task_id=task_id,
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name=name,
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form_field_key=form_field_key
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)
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return FileService.update_file(file_model, binary_data, content_type)
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@staticmethod
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def add_task_file(study_id, workflow_id, task_id, name, content_type, binary_data):
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"""Create a new file and associate it with an executing task within a workflow."""
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file_model = FileModel(
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version=0,
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study_id=study_id,
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workflow_id=workflow_id,
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task_id=task_id,
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name=name,
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)
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return FileService.update_file(file_model, binary_data, content_type)
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@staticmethod
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def update_file(file_model, binary_data, content_type):
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file_model.version = file_model.version + 1
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file_model.last_updated = datetime.now()
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file_model.content_type = content_type
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# Verify the extension
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basename, file_extension = os.path.splitext(file_model.name)
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file_extension = file_extension.lower().strip()[1:]
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if file_extension not in FileType._member_names_:
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return ApiErrorSchema().dump(ApiError('unknown_extension',
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'The file you provided does not have an accepted extension:' +
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file_extension)), 404
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else:
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file_model.type = FileType[file_extension]
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file_data_model = session.query(FileDataModel).filter_by(file_model_id=file_model.id).with_for_update().first()
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if file_data_model is None:
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file_data_model = FileDataModel(data=binary_data, file_model=file_model)
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else:
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file_data_model.data = binary_data
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session.add_all([file_model, file_data_model])
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session.commit()
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session.flush() # Assure the id is set on the model before returning it.
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return file_model
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@staticmethod
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def get_files(workflow_spec_id=None, study_id=None, workflow_id=None, task_id=None, form_field_key=None):
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query = session.query(FileModel)
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if workflow_spec_id:
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query = query.filter_by(workflow_spec_id=workflow_spec_id)
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if study_id:
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query = query.filter_by(study_id=study_id)
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if workflow_id:
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query = query.filter_by(workflow_id=workflow_id)
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if task_id:
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query = query.filter_by(task_id=str(task_id))
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if form_field_key:
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query = query.filter_by(form_field_key=form_field_key)
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results = query.all()
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return results
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@staticmethod
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def get_file_data(file_id):
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"""Returns the file_data that is associated with the file model id"""
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return session.query(FileDataModel).filter(FileDataModel.file_model_id == file_id).first()
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