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#! /usr/bin/env python
#-*- coding: utf-8 -*-

# Newspipe - A Web based news aggregator.
# Copyright (C) 2010-2017  Cédric Bonhomme - https://www.cedricbonhomme.org
#
# For more information : https://github.com/newspipe/newspipe
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 0.1 $"
__date__ = "$Date: 2017/05/24 $"
__revision__ = "$Date: 2017/05/24 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "AGPLv3"

import logging
import datetime
from werkzeug.exceptions import BadRequest

from flask import Blueprint, render_template, flash, \
                  redirect, request, url_for, make_response
from flask_babel import gettext
from flask_login import login_required, current_user
from flask_paginate import Pagination, get_page_args
from sqlalchemy import desc

import conf
from lib.utils import redirect_url
from lib.data import import_pinboard_json, export_bookmarks
from bootstrap import db
from web.forms import BookmarkForm
from web.controllers import BookmarkController, BookmarkTagController
from web.models import BookmarkTag

logger = logging.getLogger(__name__)
bookmarks_bp = Blueprint('bookmarks', __name__, url_prefix='/bookmarks')
bookmark_bp = Blueprint('bookmark', __name__, url_prefix='/bookmark')


@bookmarks_bp.route('/', defaults={'per_page': '50'}, methods=['GET'])
@bookmarks_bp.route('/<string:status>', defaults={'per_page': '50'},
                                                                methods=['GET'])
def list_(per_page, status='all'):
    "Lists the bookmarks."
    head_titles = [gettext("Bookmarks")]
    user_id = None
    filters = {}
    tag = request.args.get('tag', None)
    if tag:
        filters['tags_proxy__contains'] = tag
    query = request.args.get('query', None)
    if query:
        query_regex = '%' + query + '%'
        filters['__or__'] = {'title__ilike': query_regex,
                            'description__ilike': query_regex}
    if current_user.is_authenticated:
        # query for the bookmarks of the authenticated user
        user_id = current_user.id
        if status == 'public':
            # load public bookmarks only
            filters['shared'] = True
        elif status == 'private':
            # load private bookmarks only
            filters['shared'] = False
        else:
            # no filter: load shared and public bookmarks
            pass
        if status == 'unread':
            filters['to_read'] = True
        else:
            pass
    else:
        # query for the shared bookmarks (of all users)
        head_titles = [gettext("Recent bookmarks")]
        not_created_before = datetime.datetime.today() - \
                                                    datetime.timedelta(days=900)
        filters['time__gt'] = not_created_before # only "recent" bookmarks
        filters['shared'] = True

    bookmarks = BookmarkController(user_id) \
                    .read(**filters) \
                    .order_by(desc('time'))

    #tag_contr = BookmarkTagController(user_id)
    #tag_contr.read().join(bookmarks).all()

    page, per_page, offset = get_page_args()
    pagination = Pagination(page=page, total=bookmarks.count(),
                            css_framework='bootstrap3',
                            search=False, record_name='bookmarks',
                            per_page=per_page)

    return render_template('bookmarks.html',
                            head_titles=head_titles,
                            bookmarks=bookmarks.offset(offset).limit(per_page),
                            pagination=pagination,
                            tag=tag,
                            query=query)


@bookmark_bp.route('/create', methods=['GET'])
@bookmark_bp.route('/edit/<int:bookmark_id>', methods=['GET'])
@login_required
def form(bookmark_id=None):
    "Form to create/edit bookmarks."
    action = gettext("Add a new bookmark")
    head_titles = [action]
    if bookmark_id is None:
        return render_template('edit_bookmark.html', action=action,
                               head_titles=head_titles, form=BookmarkForm())
    bookmark = BookmarkController(current_user.id).get(id=bookmark_id)
    action = gettext('Edit bookmark')
    head_titles = [action]
    form = BookmarkForm(obj=bookmark)
    form.tags.data = ", ".join(bookmark.tags_proxy)
    return render_template('edit_bookmark.html', action=action,
                           head_titles=head_titles, bookmark=bookmark,
                           form=form)


@bookmark_bp.route('/create', methods=['POST'])
@bookmark_bp.route('/edit/<int:bookmark_id>', methods=['POST'])
@login_required
def process_form(bookmark_id=None):
    "Process the creation/edition of bookmarks."
    form = BookmarkForm()
    bookmark_contr = BookmarkController(current_user.id)
    tag_contr = BookmarkTagController(current_user.id)

    if not form.validate():
        return render_template('edit_bookmark.html', form=form)

    if form.title.data == '':
        title = form.href.data
    else:
        title = form.title.data

    bookmark_attr = {'href': form.href.data,
                    'description': form.description.data,
                    'title': title,
                    'shared': form.shared.data,
                    'to_read': form.to_read.data}

    if bookmark_id is not None:
        tags = []
        for tag in form.tags.data.split(','):
            new_tag = tag_contr.create(text=tag.strip(), user_id=current_user.id,
                                        bookmark_id=bookmark_id)
            tags.append(new_tag)
        bookmark_attr['tags'] = tags
        bookmark_contr.update({'id': bookmark_id}, bookmark_attr)
        flash(gettext('Bookmark successfully updated.'), 'success')
        return redirect(url_for('bookmark.form', bookmark_id=bookmark_id))

    # Create a new bookmark
    new_bookmark = bookmark_contr.create(**bookmark_attr)
    tags = []
    for tag in form.tags.data.split(','):
        new_tag = tag_contr.create(text=tag.strip(), user_id=current_user.id,
                                    bookmark_id=new_bookmark.id)
        tags.append(new_tag)
    bookmark_attr['tags'] = tags
    bookmark_contr.update({'id': new_bookmark.id}, bookmark_attr)
    flash(gettext('Bookmark successfully created.'), 'success')
    return redirect(url_for('bookmark.form', bookmark_id=new_bookmark.id))


@bookmark_bp.route('/delete/<int:bookmark_id>', methods=['GET'])
@login_required
def delete(bookmark_id=None):
    "Delete a bookmark."
    bookmark = BookmarkController(current_user.id).delete(bookmark_id)
    flash(gettext("Bookmark %(bookmark_name)s successfully deleted.",
                  bookmark_name=bookmark.title), 'success')
    return redirect(url_for('bookmarks.list_'))


@bookmarks_bp.route('/delete', methods=['GET'])
@login_required
def delete_all():
    "Delete all bookmarks."
    bookmark = BookmarkController(current_user.id).read().delete()
    db.session.commit()
    flash(gettext("Bookmarks successfully deleted."), 'success')
    return redirect(redirect_url())


@bookmark_bp.route('/bookmarklet', methods=['GET', 'POST'])
@login_required
def bookmarklet():
    bookmark_contr = BookmarkController(current_user.id)
    href = (request.args if request.method == 'GET' else request.form)\
            .get('href', None)
    if not href:
        flash(gettext("Couldn't add bookmark: url missing."), "error")
        raise BadRequest("url is missing")
    title = (request.args if request.method == 'GET' else request.form)\
            .get('title', None)
    if not title:
        title = href

    bookmark_exists = bookmark_contr.read(**{'href': href}).all()
    if bookmark_exists:
        flash(gettext("Couldn't add bookmark: bookmark already exists."),
                "warning")
        return redirect(url_for('bookmark.form',
                                            bookmark_id=bookmark_exists[0].id))

    bookmark_attr = {'href': href,
                    'description': '',
                    'title': title,
                    'shared': True,
                    'to_read': True}

    new_bookmark = bookmark_contr.create(**bookmark_attr)
    flash(gettext('Bookmark successfully created.'), 'success')
    return redirect(url_for('bookmark.form', bookmark_id=new_bookmark.id))


@bookmark_bp.route('/import_pinboard', methods=['POST'])
@login_required
def import_pinboard():
    bookmarks = request.files.get('jsonfile', None)
    if bookmarks:
        try:
            nb_bookmarks = import_pinboard_json(current_user, bookmarks.read())
            flash(gettext("%(nb_bookmarks)s bookmarks successfully imported.",
                          nb_bookmarks=nb_bookmarks), 'success')
        except Exception as e:
            flash(gettext('Error when importing bookmarks.'), 'error')

    return redirect(redirect_url())


@bookmarks_bp.route('/export', methods=['GET'])
@login_required
def export():
    bookmarks = export_bookmarks(current_user)
    response = make_response(bookmarks)
    response.mimetype = 'application/json'
    response.headers["Content-Disposition"] \
            = 'attachment; filename=newspipe_bookmarks_export.json'
    return response
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