views.py

import mimetypes
import os

from django.conf import settings
from django.contrib.auth.models import AnonymousUser
from django.contrib import messages
from django.core import serializers
from django.core.exceptions import PermissionDenied, ValidationError
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from django.db.models import Q, Count
from django.http import (Http404, HttpResponse, HttpResponseRedirect,
                         JsonResponse)
from django.shortcuts import get_object_or_404, redirect, render
from django.template import loader
from django.urls import reverse
from django.views.generic import TemplateView, ListView
from .models import Category, Comment, Materi
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from administration.models import VerificationReport
from app.forms import SuntingProfilForm, UploadMateriForm
from app.models import Category, Comment, Materi, Like, ViewStatistics, DownloadStatistics, ReqMaterial
from app.utils.fileManagementUtil import get_random_filename, remove_image_exifdata
from authentication.models import User
import django


class DaftarKatalog(TemplateView):
    paginate_by = 2
    template_name = "app/katalog_materi.html"

    def get_context_data(self, **kwargs):
        return super().get_context_data(**kwargs)

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)
        context["kategori_list"] = Category.objects.all()

        lstMateri = Materi.objects.filter(status="APPROVE").order_by("date_modified")
        url = ""

        getSearch = request.GET.get('search')
        if getSearch:
            url = url + "&search={0}".format(getSearch)
            lstMateri = lstMateri.filter(
                Q(title__icontains=getSearch) |
                Q(author__icontains=getSearch) |
                Q(uploader__name__icontains=getSearch) |
                Q(descriptions__icontains=getSearch) |
                Q(publisher__icontains=getSearch)
            ).distinct()

        getKategori = request.GET.get("kategori")
        if getKategori:
            url = url + "&kategori={0}".format(getKategori)
            kategori = Category.objects.get(pk=getKategori)
            lstMateri = lstMateri.filter(categories=kategori.pk)

        getSort = request.GET.get("sort")
        if getSort:
            url = url + "&sort={0}".format(getSort)
            if(getSort == "judul"):
                lstMateri = lstMateri.order_by('title')
            elif(getSort == "penulis"):
                lstMateri = lstMateri.order_by('author')
            elif(getSort == "pengunggah"):
                lstMateri = lstMateri.order_by('uploader')
            elif(getSort == "terbaru"):
                lstMateri = lstMateri.order_by('-date_created')
            elif(getSort == "terlama"):
                lstMateri = lstMateri.order_by('date_created')            
            elif(getSort == "terpopuler"):
                lstMateri = lstMateri.annotate(count=Count('like__id')).order_by('-count')
                    
        context["materi_list"] = lstMateri
        paginator = Paginator(context["materi_list"], 15)
        page_number = request.GET.get('page')
        page_obj = paginator.get_page(page_number)
        context["materi_list"] = page_obj

        context["url"] = url
        return self.render_to_response(context=context)


class DetailMateri(TemplateView):
    template_name = "app/detail_materi.html"

    def get_context_data(self, **kwargs):
        context = super(DetailMateri, self).get_context_data(**kwargs)
        if not self.request.session or not self.request.session.session_key:
            self.request.session.save()
        materi = get_object_or_404(Materi, pk=kwargs["pk"])
        context["session_id"] = self.request.session.session_key
        context["materi_data"] = materi
        context["report"] = VerificationReport.objects.filter(materi=materi)
        context["has_liked"] = Like.objects.filter(
            materi=materi, session_id=self.request.session.session_key).exists()
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)
        query_set_for_comment = Comment.objects.filter(
            materi=context["materi_data"])
        context["comment_data"] = query_set_for_comment
        return self.render_to_response(context=context)

    def get_user_name(self, request):
        user_name = ""
        if isinstance(request.user, AnonymousUser):
            user_name = "Anonim"
        elif request.user.is_admin:
            user_name = "Admin"
        elif request.user.is_contributor:
            user_name = request.user.name
        return user_name

    def post(self, request, *args, **kwargs):
        commentText = request.POST.get("comment", None)
        if commentText == None or commentText == "":
            context = self.get_context_data(*args, **kwargs)
            context["error_message"] = "Anda belum menuliskan komentar"
            context["materi_data"] = get_object_or_404(Materi, pk=kwargs["pk"])
            query_set_for_comment = Comment.objects.filter(
                materi=context["materi_data"])
            context["comment_data"] = query_set_for_comment
            return self.render_to_response(context=context)

        materi = get_object_or_404(Materi, pk=kwargs["pk"])
        user_obj = request.user if request.user.is_authenticated else None
        comment = Comment.objects.create(comment=commentText,
                                         username=self.get_user_name(request), materi=materi, user=user_obj)
        comment.save()
        return HttpResponseRedirect(request.path)


def toggle_like(request):
    if request.method == 'POST':
        materi_id = request.POST.get('materi_id', None)
        session_id = request.POST.get('session_id', None)
        if materi_id is None or session_id is None:
            return JsonResponse({"success": False, "msg": "Missing parameter"})
        materi = get_object_or_404(Materi, pk=materi_id)
        has_liked = Like.objects.filter(
            materi=materi, session_id=session_id).exists()
        if has_liked:
            like = get_object_or_404(
                Like, materi=materi, session_id=session_id)
            like.delete()
            return JsonResponse({"success": True, "liked": True})
        else:
            Like(materi=materi, session_id=session_id).save()
            return JsonResponse({"success": True, "liked": False})
    else:
        return JsonResponse({"success": False, "msg": "Unsuported method"})


def delete_comment(request, pk_materi, pk_comment):
    comment = get_object_or_404(Comment, pk=pk_comment)
    url = '/materi/' + str(pk_materi) + "/"
    comment.delete()
    return HttpResponseRedirect(url)


def download_materi(request, pk):
    materi = get_object_or_404(Materi, pk=pk)
    path = materi.content.path
    file_path = os.path.join(settings.MEDIA_ROOT, path)
    if os.path.exists(file_path):
        try:
            mimetype = mimetypes.guess_type(file_path)
            with open(file_path, "rb") as fh:
                response = HttpResponse(fh.read(), content_type=mimetype[0])
                response["Content-Disposition"] = "attachment; filename=" + \
                    os.path.basename(file_path)
                DownloadStatistics(materi=materi).save()
                return response
        except Exception as e:
            raise Http404("File tidak dapat ditemukan.")
    else:
        raise Http404("File tidak dapat ditemukan.")


def view_materi(request, pk):
    materi = get_object_or_404(Materi, pk=pk)
    path = materi.content.path
    file_path = os.path.join(settings.MEDIA_ROOT, path)
    if os.path.exists(file_path):
        mimetype = mimetypes.guess_type(file_path)
        try:
            with open(file_path, "rb") as fh:
                response = HttpResponse(fh.read(), content_type=mimetype[0])
                response["Content-Disposition"] = "inline; filename=" + \
                    os.path.basename(file_path)
                ViewStatistics(materi=materi).save()
                return response
        except Exception as e:
            raise Http404("File tidak dapat ditemukan.")
    else:
        raise Http404("File tidak dapat ditemukan.")


class UploadMateriView(TemplateView):
    template_name = "unggah.html"
    context = {}

    def get_context_data(self, **kwargs):
        context = super(UploadMateriView, self).get_context_data(**kwargs)
        return context

    def post(self, request, *args, **kwargs):
        if request.user.is_authenticated == False:
            raise PermissionDenied(request)
        form = UploadMateriForm(request.POST, request.FILES)
        if form.is_valid():
            materi = form.save(commit=False)
            materi.uploader = request.user
            konten = form.cleaned_data['content']
            try:
                self.validate_file_extension(konten)
            except ValidationError:
                messages.error(request, "Materi gagal diunggah, format file tidak sesuai")
                return HttpResponseRedirect("/unggah/")
            materi.save()
            kateg = form.cleaned_data['categories']
            for i in kateg:
                materi.categories.add(i)
            messages.success(
                request, "Materi berhasil diunggah, periksa riwayat unggah anda")
            return HttpResponseRedirect("/unggah/")
        else:
            context = self.get_context_data(**kwargs)
            context["form"] = form
            messages.error(request, "Terjadi kesalahan pada pengisian data")
            return self.render_to_response(context)

    def get(self, request, *args, **kwargs):
        if request.user.is_authenticated == False:
            raise PermissionDenied(request)
        context = self.get_context_data(**kwargs)
        context["form"] = UploadMateriForm
        return self.render_to_response(context)
    
    def validate_file_extension(self, value):
        ext = os.path.splitext(value.name)[1]  # [0] returns path+filename
        valid_extensions = ['.pdf', '.doc', '.docx', '.jpg', '.png', '.xlsx', '.xls', '.mp4', '.mp3']
        if not ext.lower() in valid_extensions:
            raise ValidationError('Unsupported file extension.')


class UploadMateriHTML(TemplateView):
    template_name = "unggah.html"
    context = {}

    def get_template_names(self):
        if self.request.path == "/unggah/":
            template_name = "unggah.html"
        return template_name


class DashboardKontributorView(TemplateView):
    template_name = "dashboard.html"

    def dispatch(self, request, *args, **kwargs):
        if not request.user.is_authenticated or not request.user.is_contributor:
            raise PermissionDenied(request)
        return super(DashboardKontributorView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(DashboardKontributorView,
                        self).get_context_data(**kwargs)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)
        current_user = self.request.user
        materi_list = current_user.materi_set.all()
        context["materi_list"] = materi_list
        return self.render_to_response(context)


class ProfilAdminView(TemplateView):
    template_name = "profil-admin.html"

    def dispatch(self, request, *args, **kwargs):
        if not request.user.is_authenticated or not request.user.is_admin:
            raise PermissionDenied(request)
        return super(ProfilAdminView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(ProfilAdminView, self).get_context_data(**kwargs)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)
        current_user = self.request.user
        context["user"] = current_user
        return self.render_to_response(context)


class ProfilKontributorView(TemplateView):
    template_name = "profil.html"

    def dispatch(self, request, *args, **kwargs):
        if not request.user.is_authenticated or not request.user.is_contributor:
            raise PermissionDenied(request)
        return super(ProfilKontributorView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(ProfilKontributorView, self).get_context_data(**kwargs)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)
        current_user = self.request.user
        context["user"] = current_user
        return self.render_to_response(context)


class SuntingProfilView(TemplateView):
    template_name = "sunting.html"

    def dispatch(self, request, *args, **kwargs):
        if not request.user.is_authenticated or not request.user.is_contributor:
            raise PermissionDenied(request)
        return super(SuntingProfilView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(SuntingProfilView, self).get_context_data(**kwargs)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)

        current_user = self.request.user
        context["user"] = current_user

        context["form"] = SuntingProfilForm(instance=current_user)
        return self.render_to_response(context)

    def post(self, request, *args, **kwargs):
        if request.user.is_authenticated == False:
            raise PermissionDenied(request)

        current_user = self.request.user

        form = SuntingProfilForm(
            request.POST, request.FILES, instance=current_user)
        if form.is_valid():
            current_user.default_profile_picture = True

            # Removing exifdata from profile picture on upload
            if request.FILES:
                f_name = request.FILES['profile_picture'].name
                f_name = get_random_filename(f_name)
                f_path = settings.MEDIA_ROOT + "/" + f_name
                request.FILES['profile_picture'].name = f_name

                form = SuntingProfilForm(
            request.POST, request.FILES, instance=current_user)
                form.save()

                remove_image_exifdata(f_path)
            else: 
                form.save()
            return HttpResponseRedirect("/profil/")
        else:
            context = self.get_context_data(**kwargs)
            context["form"] = form
            return self.render_to_response(context)


class SuntingProfilAdminView(TemplateView):
    template_name = "sunting_admin.html"

    def dispatch(self, request, *args, **kwargs):
        if not request.user.is_admin:
            raise PermissionDenied(request)
        return super(SuntingProfilAdminView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(SuntingProfilAdminView,
                        self).get_context_data(**kwargs)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)

        current_user = self.request.user
        context["user"] = current_user

        context["form"] = SuntingProfilForm(instance=current_user)
        return self.render_to_response(context)

    def post(self, request, *args, **kwargs):
        if request.user.is_authenticated == False:
            raise PermissionDenied(request)

        current_user = self.request.user

        form = SuntingProfilForm(
            request.POST, request.FILES, instance=current_user)
        if form.is_valid():
            current_user.default_profile_picture = True

            # Removing exifdata from profile picture on upload
            if request.FILES:
                f_name = request.FILES['profile_picture'].name
                f_name = get_random_filename(f_name)
                f_path = settings.MEDIA_ROOT + "/" + f_name
                request.FILES['profile_picture'].name = f_name

                form = SuntingProfilForm(
            request.POST, request.FILES, instance=current_user)
                form.save()

                remove_image_exifdata(f_path)
            else: 
                form.save()
            return HttpResponseRedirect("/profil-admin/")
        else:
            context = self.get_context_data(**kwargs)
            context["form"] = form
            return self.render_to_response(context)

class ReqMateriView(TemplateView):
    template_name = "req_materi.html"

    def dispatch(self, request, *args, **kwargs):
        if request.user.is_authenticated == False:
            return HttpResponseRedirect("/login/")
            #raise PermissionDenied(request)
        # else if not request.user.is_admin:
        #     raise PermissionDenied(request)
        return super(ReqMateriView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(ReqMateriView,
                        self).get_context_data(**kwargs)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)

        current_user = self.request.user
        context["user"] = current_user

        context["form"] = SuntingProfilForm(instance=current_user)
        return self.render_to_response(context)

    def post(self, request, *args, **kwargs):
        if request.user.is_authenticated == False:
            raise PermissionDenied(request)

        current_user = self.request.user
        form = SuntingProfilForm(
            request.POST, request.FILES, instance=current_user)
        if form.is_valid():
            current_user.default_profile_picture = True
            form.save()
            return HttpResponseRedirect("/profil-admin/")
        else:
            context = self.get_context_data(**kwargs)
            context["form"] = form
            return self.render_to_response(context)

def post_req_materi(request):
    if request.method == 'POST':
        #return JsonResponse({"success": True, "msg": "Permintaan materi berhasil dikirimkan"})
        title = request.POST.get('title', None)
        if title is None:
            return JsonResponse({"success": False, "msg": "Missing parameter"})
        ReqMaterial(title=title).save()
        return JsonResponse({"success": True, "msg": "Permintaan materi berhasil dikirimkan"})
    else:
        return JsonResponse({"success": False, "msg": "Unsuported method"})


class SuksesLoginKontributorView(TemplateView):
    template_name = "sukses_kontri.html"

    def dispatch(self, request, *args, **kwargs):
        if not request.user.is_contributor:
            raise PermissionDenied(request)
        return super(SuksesLoginKontributorView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(SuksesLoginKontributorView,
                        self).get_context_data(**kwargs)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)

        current_user = self.request.user
        context["user"] = current_user

        return self.render_to_response(context)


class SuksesLoginAdminView(TemplateView):
    template_name = "sukses_admin.html"

    def dispatch(self, request, *args, **kwargs):
        if not request.user.is_admin:
            raise PermissionDenied(request)
        return super(SuksesLoginAdminView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(SuksesLoginAdminView, self).get_context_data(**kwargs)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)

        current_user = self.request.user
        context["user"] = current_user

        return self.render_to_response(context)


class PostsView(TemplateView):

    template_name = "user_uploaded_posts.html"

    def dispatch(self, request, *args, **kwargs):
        if not request.user.is_authenticated:
            raise PermissionDenied(request)
        return super(PostsView, self).dispatch(request, *args, **kwargs)

    def get(self, request, *args, **kwargs):
        context = super().get_context_data(**kwargs)
        user = self.request.user

        posts = Materi.objects.filter(uploader=user).order_by("-date_created")
        posts_data = { post.id: { "data": post, "comments": [] } for post in posts }

        comments = Comment.objects \
            .filter(materi__id__in=posts_data.keys()) \
            .order_by("-timestamp")

        for comment in comments:
            posts_data[comment.materi.id]["comments"].append(comment)

        context["user"] = user
        context["posts"] = posts_data

        return self.render_to_response(context=context)


class RevisiMateriView(TemplateView):
    template_name = "revisi.html"

    def dispatch(self, request, *args, **kwargs):        
        if not request.user.is_contributor:
            raise PermissionDenied(request)
        return super(RevisiMateriView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(RevisiMateriView, self).get_context_data(**kwargs)
        current_materi = get_object_or_404(Materi, pk=kwargs["pk"])
        context["materi"] = current_materi
        context["revisi_form"] = UploadMateriForm(instance=current_materi)
        return context

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**kwargs)
        return self.render_to_response(context)

    def post(self,request, *args, **kwargs):
        if request.user.is_authenticated == False:
            raise PermissionDenied(request)

        current_materi = get_object_or_404(Materi, pk=kwargs["pk"])
        form = UploadMateriForm(
            request.POST, request.FILES, instance=current_materi)
        if form.is_valid():
            materi = form.save(commit=False)
            materi.uploader = request.user
            materi.status = "REVISION"
            materi.save()
            kateg = form.cleaned_data['categories']
            for i in kateg:
                materi.categories.add(i)
            materi.save()
            return HttpResponseRedirect("/dashboard/")
        else:
            context = self.get_context_data(**kwargs)
            context["form_revisi"] = form
            return self.render_to_response(context)

def pages(request):
    context = {}
    # All resource paths end in .html.
    # Pick out the html file name from the url. And load that template.
    try:

        load_template = request.path.split("/")[-1]
        template = loader.get_template(load_template)
        return HttpResponse(template.render(context, request))

    except Exception as e:

        template = loader.get_template("error-404.html")
        return HttpResponse(template.render(context, request))