doccano/backend/data_export/pipeline/factories.py

from typing import Type

from projects.models import (
    DOCUMENT_CLASSIFICATION,
    SEQUENCE_LABELING,
    SEQ2SEQ,
    SPEECH2TEXT,
    IMAGE_CLASSIFICATION,
    INTENT_DETECTION_AND_SLOT_FILLING,
)
from . import catalog, repositories, writers


def create_repository(project):
    mapping = {
        DOCUMENT_CLASSIFICATION: repositories.TextClassificationRepository,
        SEQUENCE_LABELING: repositories.SequenceLabelingRepository,
        SEQ2SEQ: repositories.Seq2seqRepository,
        IMAGE_CLASSIFICATION: repositories.FileRepository,
        SPEECH2TEXT: repositories.Speech2TextRepository,
        INTENT_DETECTION_AND_SLOT_FILLING: repositories.IntentDetectionSlotFillingRepository,
    }
    if project.project_type not in mapping:
        ValueError(f"Invalid project type: {project.project_type}")
    repository = mapping[project.project_type](project)
    return repository


def create_writer(file_format: str) -> Type[writers.BaseWriter]:
    mapping = {
        catalog.CSV.name: writers.CsvWriter,
        catalog.JSON.name: writers.JSONWriter,
        catalog.JSONL.name: writers.JSONLWriter,
        catalog.FastText.name: writers.FastTextWriter,
        catalog.IntentAndSlot.name: writers.IntentAndSlotWriter,
    }
    if file_format not in mapping:
        ValueError(f"Invalid format: {file_format}")
    return mapping[file_format]