mirror of
https://github.com/believethehype/nostrdvm.git
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135 lines
4.7 KiB
Python
135 lines
4.7 KiB
Python
import json
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import os
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import re
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from pathlib import Path
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import dotenv
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from interfaces.dvmtaskinterface import DVMTaskInterface
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from utils.admin_utils import AdminConfig
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from utils.backend_utils import keep_alive
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from utils.definitions import EventDefinitions
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from utils.dvmconfig import DVMConfig
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from utils.nip89_utils import NIP89Config, check_and_set_d_tag
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from utils.nostr_utils import get_event_by_id, check_and_set_private_key
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"""
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This File contains a Module to extract Text from a PDF file locally on the DVM Machine
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Accepted Inputs: Url to pdf file, Event containing an URL to a PDF file
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Outputs: Text containing the extracted contents of the PDF file
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Params: None
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"""
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class TextExtractionPDF(DVMTaskInterface):
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KIND: int = EventDefinitions.KIND_NIP90_EXTRACT_TEXT
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TASK: str = "pdf-to-text"
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FIX_COST: float = 0
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def __init__(self, name, dvm_config: DVMConfig, nip89config: NIP89Config,
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admin_config: AdminConfig = None, options=None):
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super().__init__(name, dvm_config, nip89config, admin_config, options)
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def is_input_supported(self, tags):
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for tag in tags:
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if tag.as_vec()[0] == 'i':
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input_value = tag.as_vec()[1]
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input_type = tag.as_vec()[2]
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if input_type != "url" and input_type != "event":
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return False
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return True
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def create_request_from_nostr_event(self, event, client=None, dvm_config=None):
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request_form = {"jobID": event.id().to_hex()}
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# default values
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input_type = "url"
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input_content = ""
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url = ""
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for tag in event.tags():
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if tag.as_vec()[0] == 'i':
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input_type = tag.as_vec()[2]
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input_content = tag.as_vec()[1]
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if input_type == "url":
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url = input_content
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# if event contains url to pdf, we checked for a pdf link before
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elif input_type == "event":
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evt = get_event_by_id(input_content, client=client, config=dvm_config)
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url = re.search("(?P<url>https?://[^\s]+)", evt.content()).group("url")
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options = {
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"url": url,
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}
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request_form['options'] = json.dumps(options)
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return request_form
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def process(self, request_form):
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from pypdf import PdfReader
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from pathlib import Path
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import requests
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options = DVMTaskInterface.set_options(request_form)
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try:
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file_path = Path('temp.pdf')
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response = requests.get(options["url"])
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file_path.write_bytes(response.content)
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reader = PdfReader(file_path)
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number_of_pages = len(reader.pages)
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text = ""
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for page_num in range(number_of_pages):
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page = reader.pages[page_num]
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text = text + page.extract_text()
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os.remove('temp.pdf')
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return text
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except Exception as e:
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raise Exception(e)
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# We build an example here that we can call by either calling this file directly from the main directory,
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# or by adding it to our playground. You can call the example and adjust it to your needs or redefine it in the
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# playground or elsewhere
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def build_example(name, identifier, admin_config):
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dvm_config = DVMConfig()
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dvm_config.PRIVATE_KEY = check_and_set_private_key(identifier)
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dvm_config.LNBITS_INVOICE_KEY = os.getenv("LNBITS_INVOICE_KEY")
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dvm_config.LNBITS_URL = os.getenv("LNBITS_HOST")
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# Add NIP89
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nip90params = {}
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nip89info = {
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"name": name,
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"image": "https://image.nostr.build/c33ca6fc4cc038ca4adb46fdfdfda34951656f87ee364ef59095bae1495ce669.jpg",
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"about": "I extract text from pdf documents. I only support Latin letters",
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"encryptionSupported": True,
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"cashuAccepted": True,
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"nip90Params": nip90params
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}
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nip89config = NIP89Config()
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nip89config.DTAG = check_and_set_d_tag(identifier, name, dvm_config.PRIVATE_KEY, nip89info["image"])
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nip89config.CONTENT = json.dumps(nip89info)
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return TextExtractionPDF(name=name, dvm_config=dvm_config, nip89config=nip89config,
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admin_config=admin_config)
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if __name__ == '__main__':
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env_path = Path('.env')
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if env_path.is_file():
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print(f'loading environment from {env_path.resolve()}')
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dotenv.load_dotenv(env_path, verbose=True, override=True)
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else:
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raise FileNotFoundError(f'.env file not found at {env_path} ')
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admin_config = AdminConfig()
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admin_config.REBROADCAST_NIP89 = False
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admin_config.UPDATE_PROFILE = False
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admin_config.LUD16 = ""
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dvm = build_example("PDF Extractor", "pdf_extractor", admin_config)
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dvm.run()
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keep_alive()
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