mirror of
https://github.com/believethehype/nostrdvm.git
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82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
import os
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import re
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from interfaces.dvmtaskinterface import DVMTaskInterface
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from utils.definitions import EventDefinitions
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from utils.nip89_utils import NIP89Announcement
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from 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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"""
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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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COST: int = 20
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def __init__(self, name, pk):
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self.NAME = name
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self.PK = pk
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def NIP89_announcement(self, d_tag, content):
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nip89 = NIP89Announcement()
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nip89.kind = self.KIND
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nip89.pk = self.PK
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nip89.dtag = d_tag
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nip89.content = content
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return nip89
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def is_input_supported(self, input_type, input_content):
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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_form_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, config=dvm_config)
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url = re.search("(?P<url>https?://[^\s]+)", evt.content()).group("url")
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request_form["optStr"] = 'url=' + url
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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.setOptions(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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