IDDRS_API/search_tfidf/views.py

from django.shortcuts import render
from rest_framework import viewsets
from .models import Level, Standards
from .serializer import LevelSerializer, StandardsSerializer
from django.http import JsonResponse
from django.views.decorators.csrf import csrf_exempt
import json
from .tfidfSearch import cosine_similarity
from rest_framework.decorators import api_view
from pathlib import Path
import os
from django.template.loader import render_to_string
from weasyprint import HTML
from django.http import HttpResponse
from django.views.generic import View
from io import BytesIO
from django.template.loader import get_template
from xhtml2pdf import pisa



# Create your views here.

class LevelViewSet(viewsets.ModelViewSet):
    queryset = Level.objects.all()
    serializer_class = LevelSerializer

class StandardsViewSet(viewsets.ModelViewSet):
    queryset = Standards.objects.all()
    serializer_class = StandardsSerializer

# get the submetted search phrase from the front-end    
@csrf_exempt
def get_input(request):
    if request.method == "POST":
        # data is a json object that holds the searched phrase in a key
        # called phrase
        data = json.loads(request.body.decode('utf-8'))
        if data is not None:
            phrase = data['data']['phrase']
            print(phrase)
            if phrase[0] == '"' and phrase[-1] == '"':
                phrase = phrase[1:-1]
                searchResults = cosine_similarity(phrase, title=True)
                return JsonResponse({"message": "Data received", "results":searchResults})

            else:
                searchResults = cosine_similarity(phrase, title=False)
                return JsonResponse({"message": "Data received", "results":searchResults})


    return JsonResponse({"message": "Invalid request"})

@csrf_exempt
@api_view(['POST'])
def exportPDF(request):
    if request.method == "POST":
        filteredResults = request.data['params']['filteredResults']
        phrase = request.data['params']['phrase']

        template = get_template('export/outputPDF.html')
        html = template.render({'results': filteredResults, 'phrase': phrase})
        #html = template.render()

        response = HttpResponse(content_type='application/pdf')
        response['Content-Disposition'] = 'filename="output.pdf"'

        try:
            pisa_status = pisa.CreatePDF(html, dest=response)
            if pisa_status.err:
                return HttpResponse('We had some errors <pre>' + html + '</pre>')

            #response['Content-Type'] = 'application/pdf'  # Set the Content-Type after generating the PDF
            print(response)
            return response
        except Exception as e:
            return HttpResponse(f'Error generating PDF: {str(e)}', status=500)