Finish the document parsing app.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/document_parsing/parsers.py

@@ -1,20 +1,15 @@
 from __future__ import unicode_literals
 
-from io import BytesIO
 import logging
 import os
-from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
-from pdfminer.pdfpage import PDFPage
-from pdfminer.converter import TextConverter
-from pdfminer.layout import LAParams
 import subprocess
 
+from django.apps import apps
 from django.utils.translation import ugettext_lazy as _
 
 from common.utils import copyfile, fs_cleanup, mkstemp
 
 from .exceptions import ParserError, NoMIMETypeMatch
-from .models import DocumentPageContent
 from .settings import setting_pdftotext_path
 
 logger = logging.getLogger(__name__)
@@ -82,6 +77,10 @@ class Parser(object):
             self.process_document_page(document_page=document_page)
 
     def process_document_page(self, document_page):
+        DocumentPageContent = apps.get_model(
+            app_label='document_parsing', model_name='DocumentPageContent'
+        )
+
         logger.info(
             'Processing page: %d of document version: %s',
             document_page.page_number, document_page.document_version
@@ -171,32 +170,7 @@ class PopplerParser(Parser):
         return output
 
 
-class PDFMinerParser(Parser):
-    """
-    Parser for PDF files using the PDFMiner library for Python
-    """
-
-    def execute(self, file_object, page_number):
-        logger.debug('Parsing PDF page: %d', page_number)
-
-        with BytesIO() as string_buffer:
-            rsrcmgr = PDFResourceManager()
-            device = TextConverter(
-                rsrcmgr, outfp=string_buffer, laparams=LAParams()
-            )
-            interpreter = PDFPageInterpreter(rsrcmgr, device)
-            page = PDFPage.get_pages(
-                file_object, maxpages=1, pagenos=(page_number - 1,)
-            )
-            interpreter.process_page(page.next())
-            device.close()
-
-            logger.debug('Finished parsing PDF: %d', page_number)
-
-            return string_buffer.getvalue()
-
-
 Parser.register(
     mimetypes=('application/pdf',),
-    parser_classes=(PopplerParser, PDFMinerParser)
+    parser_classes=(PopplerParser,)
 )