list and get slide + thumbnail in google drive

GoogleDriveGetSlides.py

from __future__ import print_function

import httplib2
from apiclient import discovery
from django.core.exceptions import ObjectDoesNotExist
from django.http import HttpResponseRedirect
from oauth2client.client import flow_from_clientsecrets, OAuth2WebServerFlow
from oauth2client.contrib import xsrfutil
from oauth2client.contrib.django_util.storage import DjangoORMStorage


class GoogleDrive():
    # ggd = GoogleDrive(request, CredentialsModel, CLIENT_ID, CLIENT_SECRET, scopes,
    # redirect_uri, APPLICATION_NAME, allow_file_types)
    def __init__(self, *args, **kwargs):
        for k, v in kwargs.iteritems():
            setattr(self, k, v)
        self.FLOW = OAuth2WebServerFlow(
            client_id = self.CLIENT_ID,
            client_secret = self.CLIENT_SECRET,
            scope=self.scopes,
            redirect_uri=self.redirect_uri
        )
        NewCredentialsModel, NewCredentialsModel_created = self.CredentialsModel.objects.get_or_create(
            user=self.request.user,
        )
        self.storage = DjangoORMStorage(self.CredentialsModel, 'user', self.request.user, 'credential')

    def save_credentials(self):
        credential = self.FLOW.step2_exchange(self.request.GET)
        self.storage.put(credential)
        return True

    def get_credentials(self):
        credential = self.storage.get()
        status = False
        authorize_url = ''
        if not credential or credential.invalid:
            self.FLOW.params['state'] = '%s|||%s' % (xsrfutil.generate_token(self.CLIENT_SECRET,
                                                                self.request.user),self.request.build_absolute_uri())
            authorize_url = self.FLOW.step1_get_authorize_url()
            return {'status':status,'authorize_url':authorize_url,'credential':credential}
        else:
            self.credential = credential
            status = True
            return {'status':status,'authorize_url':authorize_url,'credential':credential}

    def get_list_slides(self):
        credential = self.get_credentials()['credential']
        http = credential.authorize(httplib2.Http())
        items = []
        # drive
        drive_service = discovery.build('drive', 'v3', http=http)
        slide_service = discovery.build('slides', 'v1', http=http)
        results = drive_service.files().list(fields="nextPageToken, files(id, name, mimeType)").execute()
        all_items = results.get('files', [])
        for item in all_items:
            if item['mimeType'] in self.allow_file_types:
                presentation = slide_service.presentations().get(presentationId=item['id']).execute()
                slide = presentation.get('slides')[0]
                objectId = slide.get('objectId')
                slide_thumbnail = slide_service.presentations().pages().getThumbnail(presentationId=item['id'],
                                                                                     pageObjectId=objectId).execute()
                item['thumbnail'] = slide_thumbnail
                items.append(item)
        return items

    def get_page_thumbnail(self, slide_id, page_number):
        page_number = page_number -1
        credential = self.get_credentials()['credential']
        http = credential.authorize(httplib2.Http())
        # drive
        slide_service = discovery.build('slides', 'v1', http=http)

        presentation = slide_service.presentations().get(presentationId=slide_id).execute()
        slides = presentation.get('slides')
        max_page_number = len(slides) - 1
        if page_number > max_page_number:
            page_number = max_page_number
        slide = slides[page_number]
        objectId = slide.get('objectId')
        thumbnail = slide_service.presentations().pages().getThumbnail(presentationId=slide_id,
                                                                       pageObjectId=objectId).execute()
        return thumbnail['contentUrl']