path: root/tbc/views.py

from django.utils.encoding import force_text
from django.contrib.contenttypes.models import ContentType
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render_to_response, redirect
from django.views.decorators.csrf import csrf_exempt
from django.core.context_processors import csrf
from django.contrib.auth import authenticate, login, logout
from django.contrib.admin.models import CHANGE
from models import *
from tbc.forms import *
import os
import zipfile
import StringIO
import smtplib
import shutil
import string
import random
import json
import reportlab
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter, landscape, A4, cm
from reportlab.lib.units import inch
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib.enums import TA_JUSTIFY, TA_LEFT, TA_CENTER
from reportlab.lib import colors
from reportlab.pdfgen import canvas
from reportlab.platypus import Paragraph, Table, TableStyle
from email.mime.text import MIMEText


def add_log(user, object, flag, message, proposal_id=None, chat='No message'):
    '''Creates log entry of the user activities.'''
    ActivityLog(
        user_id=user.id,
        content_type_id=ContentType.objects.get_for_model(object).id,
        object_id=object.id,
        object_repr=force_text(object),
        action_flag=flag,
        change_message=message,
        proposal_id = proposal_id,
        conversation = chat,
    ).save()


def email_send(to,subject,msg):
    try:
        smtpObj = smtplib.SMTP('localhost')
        mail_from = "textbook@fosse.in"
        message = MIMEText(msg)
        message['Subject'] = subject
        message['From'] = mail_from
        message['to'] = to
        smtpObj.sendmail(mail_from, to, message.as_string())
    except SMTPException:
        return HttpResponse("Error:unable to send email")


def is_reviewer(user):
    if user.groups.filter(name='reviewer').count() == 1:
        return True


def InternshipForms(request):
    context = {}
    images = []
    if request.user.is_anonymous():
        context['anonymous'] = True
    else:
        if is_reviewer(request.user):
            context['reviewer'] = request.user
        else:
            context['user'] = request.user
    return render_to_response('tbc/internship-forms.html', context)


def SampleIpynb(request):
    return render_to_response('tbc/sample.html')


def AboutPytbc(request):
    context = {}
    images = []
    if request.user.is_anonymous():
        context['anonymous'] = True
    else:
        if is_reviewer(request.user):
            context['reviewer'] = request.user
        else:
            context['user'] = request.user
    return render_to_response('tbc/about-pytbc.html', context)


def Home(request):
    context = {}
    images = []
    if request.user.is_anonymous():
        context['anonymous'] = True
    else:
        if is_reviewer(request.user):
            context['reviewer'] = request.user
        else:
            context['user'] = request.user
    if 'up' in request.GET:
        context['up'] = True
    if 'profile' in request.GET:
        context['profile'] = True
    if 'login' in request.GET:
        context['login'] = True
    if 'logout' in request.GET:
        context['logout'] = True
    if 'update_book' in request.GET:
        context['update_book'] = True
    if 'not_found' in request.GET:
        context['not_found'] = True
    if 'proposal' in request.GET:
        context['proposal_submitted'] = True
    if 'proposal_pending' in request.GET:
        context['proposal_pending'] = True
    if 'no_book_alloted' in request.GET:
        context['no_book_alloted'] = True
    if 'sample_notebook' in request.GET:
        context['sample_notebook'] = True
    if 'cannot_submit_sample' in request.GET:
        context['cannot_submit_sample'] =True

    books = Book.objects.filter(approved=True).order_by("-id")[0:6]
    for book in books:
        images.append(ScreenShots.objects.filter(book=book)[0])
    context['images'] = images
    book_images = []
    for i in range(len(books)):
        obj = {'book':books[i], 'image':images[i]}
        book_images.append(obj)
    context['items'] = book_images
    return render_to_response('base.html', context)


def UserLogin(request):
    context = {}
    context.update(csrf(request))
    if 'require_login' in request.GET:
        context['require_login'] = True
    if request.method == 'POST':
        form = UserLoginForm(request.POST)
        username = request.POST['username']
        password = request.POST['password']
        if username == "" or password == "":
            form = UserLoginForm()
            context['form'] = form
            context['empty'] = True
            return render_to_response('tbc/login.html', context)
        curr_user = authenticate(username=username, password=password)
        if curr_user is not None:
            login(request, curr_user)
            add_log(curr_user, curr_user, CHANGE, 'Logged in')
        else:
            form = UserLoginForm()
            context['form'] = form
            context['invalid'] = True
            return render_to_response('tbc/login.html', context)
        if is_reviewer(curr_user):
            context['reviewer'] = curr_user
            return HttpResponseRedirect("/book-review")
        else:
            context['user'] = curr_user
            try:
                Profile.objects.get(user=curr_user)
                return HttpResponseRedirect("/?login=success")
            except:
                return HttpResponseRedirect("/profile/?update=profile")
    else:
        form = UserLoginForm()
        if 'signup' in request.GET:
            context['signup'] = True
    context['form'] = form
    return render_to_response('tbc/login.html', context)


def UserRegister(request):
    context = {}
    if request.method == 'POST':
        form = UserRegisterForm(request.POST)
        if form.is_valid():
            user = form.save()
            add_log(user, user, CHANGE, 'Registered')
            return HttpResponseRedirect('/login/?signup=done')
        else:
            context = {}
            context.update(csrf(request))
            context['form'] = form
            return render_to_response('tbc/register.html', context)
    else:
        form = UserRegisterForm()
    context.update(csrf(request))
    context['form'] = form
    return render_to_response('tbc/register.html', context)


def UserProfile(request):
    context = {}
    user = request.user
    if user.is_authenticated():
        if request.method == 'POST':
            user_profile = Profile.objects.filter(user=user)
            if user_profile.exists():
                form = UserProfileForm(request.POST, instance=user_profile[0])
            else:
                form = UserProfileForm(request.POST)
            if form.is_valid():
                data = form.save(commit=False)
                data.user = request.user
                data.save()
                add_log(user, user, CHANGE,'Profile entry')
                return HttpResponseRedirect('/')
            else:
                context.update(csrf(request))
                context['form'] = form
                return render_to_response('tbc/profile.html', context)
        else:
            form = UserProfileForm()
        context.update(csrf(request))
        context['form'] = form
        context['user'] = user
        if 'update' in request.GET:
            context['profile'] = True
        return render_to_response('tbc/profile.html', context)
    else:
        return HttpResponseRedirect('/login/?require_login=True')


def UserLogout(request):
    user = request.user
    if user.is_authenticated() and user.is_active:
        logout(request)
    add_log(user, user, CHANGE, 'Logged out')
    return redirect('/?logout=done')


def ForgotPassword(request):
    context = {}
    user_emails = []
    context.update(csrf(request))
    if request.user.is_anonymous():
        context['anonymous'] = True
    if request.method == 'POST':
        email = request.POST['email']
        profiles = Profile.objects.all()
        for profile in profiles:
            user_emails.append(profile.user.email)
        if email in user_emails:
            user = User.objects.get(email=email)
            password = ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(8))
            user.set_password(password)
            user.save()
            subject = "PythonTBC: Password Reset"
            message = "Dear "+user.first_name+",\n"+\
            "Your password for PythonTBC interface has been reset."+\
            "Your credentials are:\n"+\
            "Username: "+user.username+\
            "\nPassword: "+password+\
            "\n\nKindly login with the given password and update your password through the below given link."+\
            "\nLink: http://tbc-python.fossee.in/update-password."+\
            "\n\nThank You !"
            email_send(email, subject, message)
            form = UserLoginForm()
            context['form'] = form
            context['forgot_pass_redirection'] = True
            return render_to_response("tbc/login.html", context)
        else:
            context['invalid_email'] = True
            return render_to_response("tbc/forgot-password.html", context)
    else:
        return render_to_response("tbc/forgot-password.html", context)


def UpdatePassword(request):
    context = {}
    user = request.user
    context.update(csrf(request))
    if user.is_authenticated():
        if request.method == 'POST':
            new_password = request.POST['new_password']
            confirm = request.POST['confirm_new_password']
            if new_password == "" or confirm == "":
                form = PasswordResetForm()
                context['empty'] = True
                context['form'] = form
                return render_to_response("tbc/update-password.html", context)
            if new_password == confirm:
                user.set_password(new_password)
                user.save()
                add_log(user, user, CHANGE, 'Password updated')
                form = UserLoginForm()
                context['password_updated'] = True
                context['form'] = form
                logout(request)
                return render_to_response("tbc/login.html", context)
            else:
                form = PasswordResetForm()
                context['no_match'] = True
                context['form'] = form
                return render_to_response("tbc/update-password.html", context)
        else:
            form = PasswordResetForm()
            context['form'] = form
            return render_to_response("tbc/update-password.html", context)
    else:
        form = UserLoginForm()
        context['form'] = form
        context['require_login'] = True
        return render_to_response("tbc/login.html", context)


def SubmitBook(request):
    context = {}
    curr_user = request.user
    if request.method == 'POST':
        form = BookForm(request.POST)
        if form.is_valid():
            data = form.save(commit=False)
            profile = Profile.objects.get(user=request.user.id)
            data.contributor = profile
            data.reviewer = Reviewer.objects.get(pk=1)
            data.save()
            context['user'] = curr_user
            curr_book = Book.objects.order_by("-id")[0]
            curr_book_id = curr_book.id
            return HttpResponseRedirect('/submit-code-old/'+str(curr_book_id))
        else:
            context.update(csrf(request))
            context['form'] = form
            context['user'] = curr_user
            return render_to_response('tbc/submit-book.html', context)
    else:
        form = BookForm()
    context.update(csrf(request))
    context['form'] = form
    context['user'] = curr_user
    return render_to_response('tbc/submit-book.html', context)


def SubmitCodeOld(request, book_id=None):
    user = request.user
    curr_profile = Profile.objects.get(user=user)
    context = {}
    curr_book = Book.objects.get(id=book_id)
    if request.method == 'POST':
        for i in range(1, curr_book.no_chapters+1):
            chapter = Chapters()
            chapter.name = request.POST['chapter'+str(i)]
            chapter.notebook = request.FILES['notebook'+str(i)]
            chapter.book = curr_book
            chapter.save()
        for i in range(1, 4):
            screenshot = ScreenShots()
            screenshot.caption = request.POST['caption'+str(i)]
            screenshot.image = request.FILES['image'+str(i)]
            screenshot.book = curr_book
            screenshot.save()
        subject = "Python-TBC: Book Submission"
        message = "Hi "+curr_book.reviewer.name+",\n"+\
                  "A book has been submitted on the Python TBC interface.\n"+\
                  "Details of the Book & Contributor:\n"+\
                  "Contributor: "+curr_book.contributor.user.first_name+" "+curr_book.contributor.user.last_name+"\n"+\
                  "Book Title: "+curr_book.title+"\n"+\
                  "Author: "+curr_book.author+"\n"+\
                  "Publisher: "+curr_book.publisher_place+"\n"+\
                  "ISBN: "+curr_book.isbn+"\n"+\
                  "Follow the link to review the book: \n"+\
                  "http://tbc-python.fossee.in/book-review/"+str(curr_book.id)
        email_send(curr_book.reviewer.email, subject, message)
        return HttpResponseRedirect('/?up=done')
    else:
        context.update(csrf(request))
        context['user'] = user
        context['curr_book'] = curr_book
        context['no_notebooks'] = [i for i in range(1, curr_book.no_chapters+1)]
        context['no_images'] = [i for i in range(1, 4)]
        return render_to_response('tbc/upload-content-old.html', context)


def SubmitProposal(request):
    curr_user = request.user
    user_profile = Profile.objects.get(user=curr_user.id)
    context = {}
    context.update(csrf(request))
    context['user'] = curr_user
    user_proposals = list(Proposal.objects.filter(user=user_profile))
    proposal_id = None
    can_submit_new = True
    matching_books = []
    for proposal in user_proposals:
        if proposal.status != 'book completed':
            can_submit_new = False
        if proposal.status == 'rejected':
            can_submit_new = True
            proposal_id = proposal.id

    if can_submit_new:
        if request.method == 'POST':
            try:
                proposal = Proposal.objects.get(id=proposal_id)
            except:
                proposal = Proposal()
            proposal.user = user_profile
            proposal.status = 'Pending'
            proposal.save()
            book_titles = request.POST.getlist('title')
            book_authors = request.POST.getlist('author')
            book_categories = request.POST.getlist('category')
            book_pubs = request.POST.getlist('publisher_place')
            book_isbns = request.POST.getlist('isbn')
            book_editions = request.POST.getlist('edition')
            book_years = request.POST.getlist('year_of_pub')
            book_chapters = request.POST.getlist('no_chapters')
            textbooks = proposal.textbooks.all()
            textbooks.delete()
            for item in range(3):
                tempbook = TempBook(no_chapters=0)
                tempbook.title = book_titles[item]
                tempbook.author = book_authors[item]
                tempbook.category = book_categories[item]
                tempbook.publisher_place = book_pubs[item]
                tempbook.isbn = book_isbns[item]
                tempbook.edition = book_editions[item]
                tempbook.year_of_pub = book_years[item]
                tempbook.save()
                proposal.textbooks.add(tempbook)
            add_log(curr_user, proposal, CHANGE, 'Proposed Books', proposal.id)
            return HttpResponseRedirect('/?proposal=submitted')
        else:
            book_forms = []
            for i in range(3):
                form = BookForm()
                if proposal_id:
                    proposal = Proposal.objects.get(id=proposal_id)
                    textbooks = proposal.textbooks.all()
                    if len(textbooks) == 3:
                        form.initial['title'] = textbooks[i].title
                        form.initial['author'] = textbooks[i].author
                        form.initial['category'] = textbooks[i].category
                        form.initial['publisher_place'] = textbooks[i].publisher_place
                        form.initial['isbn'] = textbooks[i].isbn
                        form.initial['edition'] = textbooks[i].edition
                        form.initial['year_of_pub'] = textbooks[i].year_of_pub
                        form.initial['no_chapters'] = textbooks[i].no_chapters

                book_forms.append(form)
            context['book_forms'] = book_forms
            return render_to_response('tbc/submit-proposal.html', context)
    else:
        return HttpResponseRedirect('/?proposal_pending=True')


def ListAICTE(request):
    curr_user = request.user
    user_profile = Profile.objects.get(user=curr_user.id)
    user_proposals = Proposal.objects.filter(user=user_profile)
    context = {}
    context.update(csrf(request))
    context['user'] = curr_user
    if request.method == "POST":
        category = request.POST['category']
        return HttpResponse(category)
        context['category'] = category
        if category == "all":
            aicte_books = AicteBook.objects.filter(proposed=0)
        else:
            aicte_books = AicteBook.objects.filter(category=category, proposed=0)
        if len(aicte_books) == 0:
            context['no_books'] = True
    else:
        aicte_books = AicteBook.objects.filter(proposed=0)
        context['aicte_books'] = aicte_books
    return render_to_response('tbc/aicte-books.html', context)


def SubmitAICTEProposal(request, aicte_book_id=None):
    curr_user = request.user
    user_profile = Profile.objects.get(user=curr_user.id)
    context = {}
    context.update(csrf(request))
    context['user'] = curr_user
    user_proposals = Proposal.objects.filter(user=user_profile)
    book_proposed = AicteBook.objects.get(id=aicte_book_id)
    context['aicte_book'] = book_proposed
    can_submit_new = True
    proposal_id = None
    for proposal in user_proposals:
        if proposal.status != "book completed":
            can_submit_new = False
        if proposal.status == 'rejected':
            can_submit_new = True
            proposal_id = proposal.id
    if can_submit_new:
        if request.method == 'POST':
            book_proposed.title = request.POST['title']
            book_proposed.author = request.POST['author']
            book_proposed.category = request.POST['category']
            book_proposed.publisher_place = request.POST['publisher_place']
            book_proposed.isbn = request.POST['isbn']
            book_proposed.edition = request.POST['edition']
            book_proposed.year_of_pub = request.POST['year_of_pub']
            book_proposed.proposed = True
            book_proposed.save()
            try:
                proposal = Proposal.objects.get(id=proposal_id)
            except:
                proposal = Proposal()
            proposal.user = user_profile
            proposal.status = 'Pending'
            proposal.save()
            textbooks = proposal.textbooks.all()
            if textbooks:
                textbooks.delete()
            tempbook = TempBook(no_chapters=0)
            tempbook.title = book_proposed.title
            tempbook.author = book_proposed.author
            tempbook.category = book_proposed.category
            tempbook.publisher_place = book_proposed.publisher_place
            tempbook.isbn = book_proposed.isbn
            tempbook.edition = book_proposed.edition
            tempbook.year_of_pub = book_proposed.year_of_pub
            tempbook.save()
            proposal.textbooks.add(tempbook)
            print proposal.textbooks.all()
            add_log(curr_user, proposal, CHANGE, 'AICTE proposal' ,proposal.id)
            return HttpResponseRedirect('/?proposal=submitted')
        else:
            book_form = BookForm()
            book_form.initial['title'] = book_proposed.title
            book_form.initial['author'] = book_proposed.author
            book_form.initial['publisher_place'] = book_proposed.publisher_place
            book_form.initial['category'] = book_proposed.category
            book_form.initial['isbn'] = book_proposed.isbn
            book_form.initial['edition'] = book_proposed.edition
            book_form.initial['year_of_pub'] = book_proposed.year_of_pub
            context['form'] = book_form
            return render_to_response('tbc/confirm-aicte-details.html', context)
    else:
        return HttpResponseRedirect('/?proposal_pending=True')


def ReviewProposals(request, proposal_id=None, textbook_id=None):
    context = {}
    user = request.user
    if is_reviewer(user):
        context['reviewer'] = user
        if proposal_id:
            proposal = Proposal.objects.get(id=proposal_id)
            accepted_book = TempBook.objects.get(id=textbook_id)
            new_book = Book()
            new_book.title = accepted_book.title
            new_book.author = accepted_book.author
            new_book.category = accepted_book.category
            new_book.publisher_place = accepted_book.publisher_place
            new_book.isbn = accepted_book.isbn
            new_book.edition = accepted_book.edition
            new_book.year_of_pub = accepted_book.year_of_pub
            new_book.no_chapters = accepted_book.no_chapters
            new_book.contributor = proposal.user
            new_book.reviewer = Reviewer.objects.get(pk=1)
            new_book.save()
            proposal.status = "samples"
            proposal.accepted = new_book
            proposal.save()
            add_log(user, proposal, CHANGE, 'Proposal accepted', proposal.id)
            return HttpResponseRedirect("/proposal-review")
        else:
            new_proposals = Proposal.objects.filter(status="pending")
            old_proposals = []
            old_proposal_status = ['samples', 'sample disapproved', 'sample resubmitted', 'sample submitted']
            proposals = Proposal.objects.filter(status__in=old_proposal_status)
            for proposal in proposals:
                try:
                    sample_notebook = SampleNotebook.objects.get(proposal=proposal)
                except:
                    sample_notebook = None
                obj = {'proposal':proposal, 'sample':sample_notebook}
                old_proposals.append(obj)
            if new_proposals.count() > 0:
                no_new_proposal = False
            else:
                no_new_proposal = True
            context['no_new_proposal'] = no_new_proposal
            context['proposals'] = new_proposals
            context['old_proposals'] = old_proposals
            return render_to_response('tbc/review-proposal.html', context)
    else:
        return HttpResponse("not allowed")


def DisapproveProposal(request, proposal_id=None):
    context = {}
    context.update(csrf(request))
    proposal = Proposal.objects.get(id=proposal_id)
    if request.method == 'POST':
        changes_required = request.POST['changes_required']
        subject = "Python-TBC: Corrections Required in the sample notebook"
        message = "Hi, "+proposal.user.user.first_name+",\n"+\
        "Sample notebook for the book titled, "+proposal.accepted.title+"\
        requires following changes: \n"+\
        changes_required
        add_log(request.user, proposal, CHANGE, 'Sample disapproved',
                proposal_id, chat=subject + '\n' + changes_required)
        context.update(csrf(request))
        proposal.status = "sample disapproved"
        proposal.save()
        email_send(proposal.user.user.email, subject, message)
        return HttpResponseRedirect("/book-review/?mail_notify=done")
    else:
        context['proposal'] = proposal
        return render_to_response('tbc/disapprove-sample.html', context)


def AllotBook(request, proposal_id=None):
    context = {}
    proposal = Proposal.objects.get(id=proposal_id)
    proposal.status = "book alloted"
    proposal.save()
    subject = "Python-TBC: Book Alloted"
    message = "Hi "+proposal.user.user.first_name+",\n"+\
              "The book has been alloted to you."
    add_log(request.user, proposal, CHANGE, 'Book alloted', proposal_id)
    email_send(proposal.user.user.email, subject, message)
    return HttpResponseRedirect("/book-review/?book_alloted=done")


def RejectProposal(request, proposal_id=None):
    context = {}
    context.update(csrf(request))
    proposal = Proposal.objects.get(id=proposal_id)
    if request.method == 'POST':
        books = proposal.textbooks.all() 
        if len(books) == 1:
            aicte_book = AicteBook.objects.get(isbn=books[0].isbn)
            aicte_book.proposed = False
            aicte_book.save()
        proposal.status = 'rejected'
        proposal.save()
        remarks = request.POST['remarks']
        subject = "Python-TBC: Rejection of Proposal"
        message = "Dear "+proposal.user.user.first_name+"\nYour proposal has been\
        rejected. "+request.POST.get('remarks')
        add_log(request.user, proposal, CHANGE, 'Proposal rejected',
                proposal.id, chat=subject + '\n' + remarks)
        email_send(proposal.user.user.email, subject, message)
        context.update(csrf(request))
        return HttpResponseRedirect("/book-review/?reject-proposal=done")
    else:
        context['proposal'] = proposal
        return render_to_response('tbc/reject-proposal.html', context)


def SubmitSample(request, proposal_id=None, old_notebook_id=None):
    context = {}
    user = request.user
    context.update(csrf(request))
    if request.method == "POST":
        curr_proposal = Proposal.objects.get(id=proposal_id)
        add_log(user, curr_proposal, CHANGE, 'Sample Submitted', curr_proposal.id)
        if old_notebook_id:
            old_notebook = SampleNotebook.objects.get(id=old_notebook_id)
            old_notebook.proposal = curr_proposal
            old_notebook.name = request.POST.get('ch_name_old')
            old_notebook.sample_notebook = request.FILES['old_notebook']
            old_notebook.save()
            curr_proposal.status = "sample resubmitted"
            curr_proposal.save()
            return HttpResponseRedirect('/?sample_notebook=done')
        else:
            sample_notebook = SampleNotebook()
            sample_notebook.proposal = curr_proposal
            sample_notebook.name = request.POST.get('ch_name')
            sample_notebook.sample_notebook = request.FILES['sample_notebook']
            sample_notebook.save()
            curr_proposal.status = "sample submitted"
            curr_proposal.save()
            return HttpResponseRedirect('/?sample_notebook=done')
    else:
        profile = Profile.objects.get(user=user)
        try:
            proposal = Proposal.objects.get(user=profile, status__in=['samples','sample disapproved'])
        except Proposal.DoesNotExist:
            return HttpResponseRedirect('/?cannot_submit_sample=True')
        try:
            old_notebook = SampleNotebook.objects.get(proposal=proposal)
            context['has_old'] = True
            context['old_notebook'] = old_notebook
            context['proposal'] = proposal
            return render_to_response('tbc/submit-sample.html', context)
        except:
            context['proposal'] = proposal
            return render_to_response('tbc/submit-sample.html', context)


def ConfirmBookDetails(request):
    context = {}
    current_user = request.user
    user_profile = Profile.objects.get(user=current_user)
    try:
        proposal = Proposal.objects.get(user=user_profile, status__in=["book alloted", "codes disapproved"])
    except:
        return HttpResponseRedirect('/?no_book_alloted=true')
    book_to_update = Book.objects.get(id=proposal.accepted.id)
    if proposal.status == "codes disapproved":
        chapters = Chapters.objects.filter(book=book_to_update)
        screen_shots = ScreenShots.objects.filter(book=book_to_update)
        context.update(csrf(request))
        context['book'] = book_to_update
        context['chapters'] = chapters
        context['screenshots'] = screen_shots
        return render_to_response('tbc/update-code.html', context)
    if request.method == 'POST':
        book_form = BookForm(request.POST, instance=book_to_update)
        if book_form.is_valid():
            data = book_form.save(commit=False)
            data.contributor = user_profile
            data.save()
            context.update(csrf(request))
            context['form'] = book_form
            add_log(current_user, book_to_update, CHANGE, 'Book updated', proposal.id)
            return HttpResponseRedirect('/submit-code/')
    else:
        book_form = BookForm()
        book_form.initial['title'] = book_to_update.title
        book_form.initial['author'] = book_to_update.author
        book_form.initial['publisher_place'] = book_to_update.publisher_place
        book_form.initial['category'] = book_to_update.category
        book_form.initial['isbn'] = book_to_update.isbn
        book_form.initial['edition'] = book_to_update.edition
        book_form.initial['year_of_pub'] = book_to_update.year_of_pub
        book_form.initial['no_chapters'] = book_to_update.no_chapters
        book_form.initial['reviewer'] = book_to_update.reviewer
        context.update(csrf(request))
        context['form'] = book_form
        context['book'] = book_to_update
        return render_to_response('tbc/confirm-details.html', context)


def SubmitCode(request):
    user = request.user
    curr_profile = Profile.objects.get(user=user)
    context = {}
    try:
        curr_proposal = Proposal.objects.get(user=curr_profile, status__in=['book alloted', 'codes disapproved'])
        curr_book = curr_proposal.accepted
    except:
        return HttpResponseRedirect('/?no_book_alloted=true')
    dict = {}
    if curr_proposal.status == "codes disapproved":
        if request.method == 'POST':
            chapters = Chapters.objects.filter(book=curr_book)
            screen_shots = ScreenShots.objects.filter(book=curr_book)
            counter = 1
            for chapter in chapters:
                chapter.name = request.POST['chapter'+str(counter)]
                chapter.notebook = request.FILES['notebook'+str(counter)]
                dict['chapter'+str(counter)] = chapter.name
                chapter.screen_shots.clear()
                chapter.save()
                counter += 1
            counter = 1
            for screenshot in screen_shots:
                screenshot.caption = request.POST['caption'+str(counter)]
                screenshot.image = request.FILES['image'+str(counter)]
                screenshot.save()
                chapter_image = request.POST['chapter_image'+str(counter)]
                # if chapter name is unique then no need to convert the query
                # set to list. Instead of filter get can be used then.
                chapter = list(Chapters.objects.filter(name=dict[chapter_image]))[-1]
                chapter.screen_shots.add(screenshot)
                chapter.save()
                counter += 1
            curr_proposal.status = "codes submitted"
            curr_proposal.save()
            add_log(user, curr_book, CHANGE, 'Codes & Screenshots Resubmitted',
                curr_proposal.id)
            return HttpResponseRedirect('/')
    if request.method == 'POST':
        for i in range(1, curr_book.no_chapters+1):
            chapter = Chapters()
            chapter.name = request.POST['chapter'+str(i)]
            dict['chapter'+str(i)] = chapter.name
            chapter.notebook = request.FILES['notebook'+str(i)]
            chapter.book = curr_book
            chapter.save()
        for i in range(1, 4):
            screenshot = ScreenShots()
            screenshot.caption = request.POST['caption'+str(i)]
            screenshot.image = request.FILES['image'+str(i)]
            screenshot.book = curr_book
            screenshot.save()
            chapter_image = request.POST['chapter_image'+str(i)]
            chapter = list(Chapters.objects.filter(name=dict[chapter_image]))[-1]
            chapter.screen_shots.add(screenshot)
            chapter.save()
        book = Book.objects.order_by("-id")[0]
        proposal = Proposal.objects.get(accepted=book)
        proposal.status = "codes submitted"
        proposal.save()
        subject = "Python-TBC: Book Submission"
        message = "Hi "+curr_book.reviewer.name+",\n"+\
                  "A book has been submitted on the Python TBC interface.\n"+\
                  "Details of the Book & Contributor:\n"+\
                  "Contributor: "+curr_book.contributor.user.first_name+" "+curr_book.contributor.user.last_name+"\n"+\
                  "Book Title: "+curr_book.title+"\n"+\
                  "Author: "+curr_book.author+"\n"+\
                  "Publisher: "+curr_book.publisher_place+"\n"+\
                  "ISBN: "+curr_book.isbn+"\n"+\
                  "Follow the link to review the book: \n"+\
                  "http://tbc-python.fossee.in/book-review/"+str(curr_book.id)
        log_chat = subject + '\n' + 'Book ' + curr_book.title + \
                ' has been submitted on the Python TBC interface.'
        add_log(user, curr_book, CHANGE, 'Chapters and Screenshots added',
                proposal.id, chat=log_chat)
        email_send(book.reviewer.email, subject, message)
        return HttpResponseRedirect('/?up=done')
    else:
        context.update(csrf(request))
        context['user'] = user
        context['curr_book'] = curr_book
        context['no_notebooks'] = [i for i in range(1, curr_book.no_chapters+1)]
        context['no_images'] = [i for i in range(1, 4)]
        return render_to_response('tbc/upload-content.html', context)


def UpdateContent(request, book_id=None):
    context = {}
    user = request.user
    current_book = Book.objects.get(id=book_id)
    chapters_to_update = Chapters.objects.filter(book=current_book)
    screenshots_to_update = ScreenShots.objects.filter(book=current_book)
    if request.method == 'POST':
        for i in range(1, current_book.no_chapters+1):
            chapter = Chapters.objects.get(id=chapters_to_update[i-1].id)
            chapter.name = request.POST['chapter'+str(i)]
            chapter.notebook = request.FILES['notebook'+str(i)]
            chapter.book = current_book
            chapter.save()
        for i in range(1, 4):
            screenshot = ScreenShots.objects.get(id=screenshots_to_update[i-1].id)
            screenshot.caption = request.POST['caption'+str(i)]
            screenshot.image = request.FILES['image'+str(i)]
            screenshot.book = current_book
            screenshot.save()
        proposal = Proposal.objects.get(accepted=current_book)
        subject = "Python-TBC: Book Updated"
        message = "Hi "+current_book.reviewer.name+",\n"+\
                  "Submission for a book has been updated on the Python TBC interface.\n"+\
                  "Details of the Book & Contributor:\n"+\
                  "Contributor: "+current_book.contributor.user.first_name+" "+current_book.contributor.user.last_name+"\n"+\
                  "Book Title: "+current_book.title+"\n"+\
                  "Author: "+current_book.author+"\n"+\
                  "Publisher: "+current_book.publisher_place+"\n"+\
                  "ISBN: "+current_book.isbn+"\n"+\
                  "Follow the link to review the book: \n"+\
                  "http://dev.fossee.in/book-review/"+str(current_book.id)
        log_chat = subject + '\n' + current_book.title +\
                ' book has been updated on the Python TBC interface.'
        add_log(user, current_book, CHANGE, 'book updated', proposal.id,
                chat=log_chat)
        email_send(current_book.reviewer.email, subject, message)
        return HttpResponseRedirect('/?update_book=done')
    else:
        context.update(csrf(request))
        context['user'] = user
        context['current_book'] = current_book
        context['chapters'] = chapters_to_update
        context['screenshots'] = screenshots_to_update
        return render_to_response('tbc/update-content.html', context)


def generateZip(book_id):
    book = Book.objects.get(id=book_id)
    files_to_zip = []
    file_path = os.path.abspath(os.path.dirname(__file__))
    file_path = file_path+"/static/uploads/"
    notebooks = Chapters.objects.filter(book=book)
    for notebook in notebooks:
        files_to_zip.append(file_path+str(notebook.notebook))
    zip_subdir = "PythonTBC"
    zipfile_name = "%s.zip" %zip_subdir
    s = StringIO.StringIO()
    zip_file = zipfile.ZipFile(s, 'w')
    for fpath in files_to_zip:
        fdir, fname = os.path.split(fpath)
        zip_path = os.path.join(book.title, fname)
        zip_file.write(fpath, zip_path)
    zip_file.close()
    return s, zipfile_name


def GetZip(request, book_id=None):
    user = request.user
    s, zipfile_name = generateZip(book_id)
    resp = HttpResponse(s.getvalue(), mimetype = "application/x-zip-compressed")
    resp['Content-Disposition'] = 'attachment; filename=%s' % zipfile_name
    return resp


def BookDetails(request, book_id=None):
    context = {}
    if request.user.is_anonymous():
        context['anonymous'] = True
    else:
        if is_reviewer(request.user):
            context['reviewer'] = request.user
        else:
            context['user'] = request.user
    book = Book.objects.get(id=book_id)
    chapters = Chapters.objects.filter(book=book).order_by('pk')
    images = ScreenShots.objects.filter(book=book)
    context['chapters'] = chapters
    context['images'] = images
    context['book'] = book
    return render_to_response('tbc/book-details.html', context)


def BookReview(request, book_id=None):
    context = {}
    if is_reviewer(request.user):
        if book_id:
            book = Book.objects.get(id=book_id)
            chapters = Chapters.objects.filter(book=book).order_by('name')
            images = ScreenShots.objects.filter(book=book)
            #for old books (before automated proposal)
            try:
                proposal = Proposal.objects.get(accepted=book)
                logs = ActivityLog.objects.filter(proposal_id=proposal.id)
                context['logs'] = logs
                context['proposal'] = proposal
            except:
                pass
            context['chapters'] = chapters
            context['images'] = images
            context['book'] = book
            context['reviewer'] = request.user
            context.update(csrf(request))
            return render_to_response('tbc/book-review-details.html', context)
        else:
            if 'book_review' in request.GET:
                context['book_review'] = True
            if 'mail_notify' in request.GET:
                context['mail_notify'] = True
            books = Book.objects.filter(approved=False)
            approved_books = Book.objects.filter(approved=True)
            context['approved_books'] = approved_books
            context['books'] = books
            context['reviewer'] = request.user
            context.update(csrf(request))
            return render_to_response('tbc/book-review.html', context)
    else:
        return render_to_response('tbc/forbidden.html')


def ApproveBook(request, book_id=None):
    context = {}
    user = request.user
    if is_reviewer(request.user):
        if request.method == 'POST' and request.POST['approve_notify'] == "approve":
            book = Book.objects.get(id=book_id)
            book.approved = True
            book.save()
            proposal = Proposal.objects.get(accepted=book)
            proposal.status = "book completed"
            proposal.save()
            file_path = os.path.abspath(os.path.dirname(__file__))
            copy_path = "/".join(file_path.split("/")[1:-2])
            copy_path = "/"+copy_path+"/Python-Textbook-Companions/"
            file_path = file_path+"/static/uploads/"
            directory = file_path+book.contributor.user.first_name
            os.chmod(directory, 0777)
            os.chdir(directory)
            book_title = book.title.replace(" ", "_")
            fp = open(book_title+"/README.txt", 'w')
            fp.write("Contributed By: "+book.contributor.user.first_name+" "+book.contributor.user.last_name+"\n")
            fp.write("Course: "+book.contributor.course+"\n")
            fp.write("College/Institute/Organization: "+book.contributor.insti_org+"\n")
            fp.write("Department/Designation: "+book.contributor.dept_desg+"\n")
            fp.write("Book Title: "+book.title+"\n")
            fp.write("Author: "+book.author+"\n")
            fp.write("Publisher: "+book.publisher_place+"\n")
            fp.write("Year of publication: "+book.year_of_pub+"\n")
            fp.write("Isbn: "+book.isbn+"\n")
            fp.write("Edition: "+book.edition)
            fp.close()
            os.popen("cp -r '"+book_title+"' '"+copy_path+"'")
            subject = "Python-TBC: Book Completion"
            message = "Hi "+book.contributor.user.first_name+",\n"+\
            "Congratulations !\n"+\
            "The book - "+book.title+" is now complete.\n"+\
            "Please visit the below given link to download the forms to be filled to complete the formalities.\n"+\
            "http://tbc-python.fossee.in/internship-forms"+"\n"+\
            "The forms should be duly filled(fill only sections which are applicable) & submit at the following address:\n"+\
            "Dr. Prabhu Ramachandran, \n"+\
            "Department of Aerospace Engineering,\n"+\
            "IIT Bombay, Powai, Mumbai - 400076\n"+\
            "Kindly, write Python Texbook Companion on top of the envelope.\n\n\n"+\
            "Regards,\n"+"Python TBC,\n"+"FOSSEE, IIT - Bombay"
            add_log(user, book, CHANGE, 'Book approved', proposal.id,
                    chat=subject + '\n' + message)
            email_send(book.reviewer.email, subject, message)
            context['user'] = user
            return HttpResponseRedirect("/book-review/?book_review=done")
        elif request.method == 'POST' and request.POST['approve_notify'] == "notify":
            return HttpResponseRedirect("/notify-changes/"+book_id)
        else:
            context['user'] = user
            return HttpResponseRedirect("/book-review/"+book_id)
    else:
        return render_to_response('tbc/forbidden.html')


def NotifyChanges(request, book_id=None):
    context = {}
    if is_reviewer(request.user):
        book = Book.objects.get(id=book_id)
        proposal = Proposal.objects.get(accepted=book)
        if request.method == 'POST':
            proposal.status = "codes disapproved"
            proposal.save()
            changes_required = request.POST['changes_required']
            subject = "Python-TBC: Corrections Required"
            message = "Hi, "+book.contributor.user.first_name+",\n"+\
            "Book titled, "+book.title+" requires following changes: \n"+\
            changes_required
            context.update(csrf(request))
            add_log(request.user, book, CHANGE, 'Changes notification',
                    proposal.id, chat=subject+'\n'+changes_required)
            email_send(book.contributor.user.email, subject, message)
            return HttpResponseRedirect("/book-review/?mail_notify=done")
        else:
            context['book'] = book
            context['book_id'] = book_id
            context['mailto'] = book.contributor.user.email
            context['reviewer'] = request.user
            context.update(csrf(request))
            return render_to_response('tbc/notify-changes.html', context)
    else:
        return render_to_response('tbc/forbidden.html')


def BrowseBooks(request):
    context = {}
    category = None
    images = []
    book_images = []
    books = None
    if request.user.is_anonymous():
        context['anonymous'] = True
    else:
        if is_reviewer(request.user):
            context['reviewer'] = request.user
        else:
            context['user'] = request.user
    context.update(csrf(request))
    books = Book.objects.filter(approved=True)
    if request.method == "POST":
        category = request.POST['category']
        if category == "all":
            books = Book.objects.filter(approved=True)
        else:
            books = Book.objects.filter(category=category, approved=True)
    else:
        books = Book.objects.filter(approved=True)
    for book in books:
       images.append(ScreenShots.objects.filter(book=book)[0])
    for i in range(len(books)):
       obj = {'book':books[i], 'image':images[i]}
       book_images.append(obj)
    context['items'] = book_images
    context['category'] = category
    return render_to_response('tbc/browse-books.html', context)


def ConvertNotebook(request, notebook_path=None):
    context = {}
    path = os.path.abspath(os.path.dirname(__file__))
    path = path+"/static/uploads/"
    path = path+notebook_path
    notebook_name = path.split("/")[-1:]
    notebook_name = notebook_name[0].split(".")[0]
    path = path.split("/")[0:-1]
    path = "/".join(path)+"/"
    os.chdir(path)
    try:
        template = path.split("/")[8:]
        template = "/".join(template)+notebook_name+".html"
        return render_to_response(template, {})
    except:
        os.popen("ipython nbconvert --to html \""+path+notebook_name+".ipynb\"")
        template = path.split("/")[8:]
        template = "/".join(template)+notebook_name+".html"
        return render_to_response(template, {})


def CompletedBooks(request):
    context = {}
    context.update(csrf(request))
    category = "All"
    if request.user.is_anonymous():
        context['anonymous'] = True
    else:
        if is_reviewer(request.user):
            context['reviewer'] = request.user
        else:
            context['user'] = request.user
    if request.method == "POST":
        category = request.POST['category']
        if category == "all":
            completed_books = Book.objects.filter(approved=True)
        else:
            completed_books = Book.objects.filter(category=category, approved=True)
    else:
        completed_books = Book.objects.filter(approved=True)
    context['category'] = category
    context['completed_books'] = completed_books
    return render_to_response('tbc/completed_books.html', context)
    

def BooksUnderProgress(request):
    context = {}
    images = []
    if request.user.is_anonymous():
        context['anonymous'] = True
    else:
        if is_reviewer(request.user):
            context['reviewer'] = request.user
        else:
            context['user'] = request.user
    return render_to_response('tbc/books_under_progress.html', context)


def GetCertificate(request, book_id=None):
    user = request.user
    user_profile = Profile.objects.get(user=user)
    books = Book.objects.filter(contributor=user_profile, approved=True)
    context = {}
    context['user'] = user
    context['books'] = books
    if book_id:
        book = Book.objects.get(id=book_id)
        #replace this with the code for certificate.
        return HttpResponse(book.title)
    return render_to_response('tbc/get-certificate.html', context)
    

def RedirectToIpynb(request, notebook_path=None):
    context = {}
    notebook = notebook_path.split("/")
    notebook[0] = "notebooks"
    notebook = "/".join(notebook)
    redirect_url = "https://ipynb.fossee.in/"+notebook
    return redirect(redirect_url)


# ajax views
@csrf_exempt
def ajax_matching_books(request):
    titles = request.POST["titles"]
    titles = json.loads(titles)
    matches = []
    i = 1
    flag = None
    for title in titles:
        if title:
            match = TempBook.objects.filter(title__icontains=title)
            if match:
                flag = True
                matches.append(match)
            else:
                matches.append(None)
    context = {
        'matches': matches,
        'flag': flag
    }
    return render_to_response('tbc/ajax-matching-books.html', context)