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import os |
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import json |
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import google |
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import argparse |
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from glob import glob |
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from typing import Optional, Sequence |
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from google.api_core.client_options import ClientOptions |
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from google.cloud import documentai |
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from utils import read_file_paths, validate_json_save_path, load_json_file |
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CATEGORY_MAP = { |
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"paragraph": "paragraph", |
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"footer": "footer", |
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"header": "header", |
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"heading-1": "heading1", |
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"heading-2": "heading1", |
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"heading-3": "heading1", |
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"table": "table", |
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"title": "heading1" |
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} |
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class GoogleInference: |
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def __init__( |
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self, |
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save_path, |
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input_formats=[".pdf", ".jpg", ".jpeg", ".png", ".bmp", ".tiff", ".heic"] |
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): |
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"""Initialize the GoogleInference class |
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Args: |
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save_path (str): the json path to save the results |
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input_formats (list, optional): the supported file formats. |
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""" |
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self.project_id = os.getenv("GOOGLE_PROJECT_ID") or "" |
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self.processor_id = os.getenv("GOOGLE_PROCESSOR_ID") or "" |
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self.location = os.getenv("GOOGLE_LOCATION") or "" |
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self.endpoint = os.getenv("GOOGLE_ENDPOINT") or "" |
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if not all([self.project_id, self.processor_id, self.location, self.endpoint]): |
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raise ValueError("Please set the environment variables for Google Cloud") |
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self.processor_version = "rc" |
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validate_json_save_path(save_path) |
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self.save_path = save_path |
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self.processed_data = load_json_file(save_path) |
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self.formats = input_formats |
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@staticmethod |
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def generate_html_table(table_data): |
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html = "<table border='1'>\n" |
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for row in table_data["bodyRows"]: |
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html += " <tr>\n" |
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for cell in row["cells"]: |
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text = cell["blocks"][0]["textBlock"]["text"] if cell["blocks"] else "" |
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row_span = f" rowspan='{cell['rowSpan']}'" if cell["rowSpan"] > 1 else "" |
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col_span = f" colspan='{cell['colSpan']}'" if cell["colSpan"] > 1 else "" |
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html += f" <td{row_span}{col_span}>{text}</td>\n" |
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html += " </tr>\n" |
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html += "</table>" |
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return html |
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@staticmethod |
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def iterate_blocks(data): |
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block_sequence = [] |
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def recurse_blocks(blocks): |
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for block in blocks: |
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block_id = block.get("blockId", "") |
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block_type = block.get("textBlock", {}).get("type", "") |
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block_text = block.get("textBlock", {}).get("text", "") |
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if block_type: |
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block_sequence.append((block_id, block_type, block_text)) |
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block_id = block.get("blockId", "") |
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block_table = block.get("tableBlock", {}) |
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if block_table: |
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block_table_html = GoogleInference.generate_html_table(block_table) |
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block_sequence.append((block_id, "table", block_table_html)) |
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if block.get("textBlock", {}).get("blocks", []): |
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recurse_blocks(block["textBlock"]["blocks"]) |
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if "documentLayout" in data: |
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recurse_blocks(data["documentLayout"].get("blocks", [])) |
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return block_sequence |
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def post_process(self, data): |
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processed_dict = {} |
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for input_key in data.keys(): |
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output_data = data[input_key] |
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processed_dict[input_key] = { |
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"elements": [] |
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} |
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blocks = self.iterate_blocks(output_data) |
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id_counter = 0 |
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for _, category, transcription in blocks: |
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category = CATEGORY_MAP.get(category, "paragraph") |
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data_dict = { |
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"coordinates": [[0, 0], [0, 0], [0, 0], [0, 0]], |
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"category": category, |
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"id": id_counter, |
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"content": { |
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"text": transcription if category != "table" else "", |
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"html": transcription if category == "table" else "", |
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"markdown": "" |
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} |
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} |
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processed_dict[input_key]["elements"].append(data_dict) |
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id_counter += 1 |
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for key in self.processed_data: |
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processed_dict[key] = self.processed_data[key] |
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return processed_dict |
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def process_document_layout_sample(self, file_path, mime_type, chunk_size=1000) -> None: |
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process_options = documentai.ProcessOptions( |
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layout_config=documentai.ProcessOptions.LayoutConfig( |
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chunking_config=documentai.ProcessOptions.LayoutConfig.ChunkingConfig( |
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chunk_size=chunk_size, |
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include_ancestor_headings=True, |
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) |
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) |
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) |
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document = self.process_document( |
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file_path, |
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mime_type, |
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process_options=process_options, |
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) |
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document_dict = json.loads(google.cloud.documentai_v1.Document.to_json(document)) |
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return document_dict |
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def process_document( |
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self, file_path, |
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mime_type: str, |
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process_options: Optional[documentai.ProcessOptions] = None, |
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) -> documentai.Document: |
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client = documentai.DocumentProcessorServiceClient( |
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client_options=ClientOptions( |
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api_endpoint=f"{self.endpoint}" |
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) |
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) |
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with open(file_path, "rb") as image: |
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image_content = image.read() |
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name = client.processor_version_path( |
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self.project_id, |
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self.location, |
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self.processor_id, |
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self.processor_version |
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) |
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request = documentai.ProcessRequest( |
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name=name, |
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raw_document=documentai.RawDocument( |
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content=image_content, mime_type=mime_type |
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), |
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process_options=process_options, |
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) |
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result = client.process_document(request=request) |
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return result.document |
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def infer(self, file_path): |
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"""Infer the layout of the documents in the given file path |
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Args: |
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file_path (str): the path to the file or directory containing the documents to process |
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""" |
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paths = read_file_paths(file_path, supported_formats=self.formats) |
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error_files = [] |
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result_dict = {} |
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for idx, filepath in enumerate(paths): |
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print("({}/{}) {}".format(idx+1, len(paths), filepath)) |
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if filepath.suffix == ".pdf": |
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mime_type = "application/pdf" |
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elif filepath.suffix == ".jpg" or filepath.suffix == ".jpeg": |
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mime_type = "image/jpeg" |
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elif filepath.suffix == ".png": |
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mime_type = "image/png" |
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else: |
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raise NotImplementedError |
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filename = filepath.name |
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if filename in self.processed_data.keys(): |
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print(f"'{filename}' is already in the loaded dictionary. Skipping this sample") |
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continue |
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try: |
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document_dict = self.process_document_layout_sample(filepath, mime_type) |
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except Exception as e: |
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print(e) |
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print("Error processing document..") |
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error_files.append(filepath) |
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continue |
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result_dict[filename] = document_dict |
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result_dict = self.post_process(result_dict) |
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with open(self.save_path, "w") as f: |
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json.dump(result_dict, f) |
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for error_file in error_files: |
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print(f"Error processing file: {error_file}") |
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print("Finished processing all documents") |
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print("Results saved to: {}".format(self.save_path)) |
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print("Number of errors: {}".format(len(error_files))) |
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if __name__ == "__main__": |
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args = argparse.ArgumentParser() |
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args.add_argument( |
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"--data_path", |
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type=str, default="", required=True, |
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help="Path containing the documents to process" |
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) |
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args.add_argument( |
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"--save_path", |
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type=str, default="", required=True, |
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help="Path to save the results" |
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) |
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args.add_argument( |
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"--input_formats", |
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type=list, default=[ |
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".pdf", ".jpg", ".jpeg", ".png", ".bmp", ".tiff", ".heic" |
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], |
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help="Supported input file formats" |
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) |
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args = args.parse_args() |
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google_inference = GoogleInference( |
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args.save_path, |
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input_formats=args.input_formats |
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) |
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google_inference.infer(args.data_path) |
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