mirror of
https://github.com/believethehype/nostrdvm.git
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119 lines
4.3 KiB
Python
119 lines
4.3 KiB
Python
import json
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import os
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import re
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from nostr_sdk import Kind
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from nostr_dvm.interfaces.dvmtaskinterface import DVMTaskInterface, process_venv
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from nostr_dvm.utils.admin_utils import AdminConfig
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from nostr_dvm.utils.definitions import EventDefinitions
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from nostr_dvm.utils.dvmconfig import DVMConfig, build_default_config
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from nostr_dvm.utils.nip88_utils import NIP88Config
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from nostr_dvm.utils.nip89_utils import NIP89Config, check_and_set_d_tag
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from nostr_dvm.utils.nostr_utils import get_event_by_id
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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: Kind = 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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dependencies = [("nostr-dvm", "nostr-dvm"),
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("pypdf", "pypdf==3.17.1")]
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async def init_dvm(self, name, dvm_config: DVMConfig, nip89config: NIP89Config, nip88config: NIP88Config = None,
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admin_config: AdminConfig = None, options=None):
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dvm_config.SCRIPT = os.path.abspath(__file__)
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async def is_input_supported(self, tags, client=None, dvm_config=None):
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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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async 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().to_vec():
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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 = await 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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async 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 = self.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 = build_default_config(identifier)
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admin_config.LUD16 = dvm_config.LN_ADDRESS
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# Add NIP89
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nip89info = {
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"name": name,
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"picture": "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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"supportsEncryption": True,
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"acceptsNutZaps": False,
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"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["picture"])
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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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process_venv(TextExtractionPDF)
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