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#!/usr/bin/env python3
import datetime
import enum
import operator
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import os
import re
import unicodedata
from collections import OrderedDict, namedtuple
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from functools import partial
from http import HTTPStatus
from logging.handlers import SMTPHandler
from operator import attrgetter
from random import choice, sample, shuffle
from urllib.parse import quote, urljoin, urlparse
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import requests
from colorthief import ColorThief
from flask import (
    Flask, abort, make_response, redirect, render_template, request, url_for)
from flask.logging import default_handler
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from flask_caching import Cache
from flask_cdn import CDN
from flask_cdn import url_for as _cdn_url_for
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from flask_gravatar import Gravatar
from flask_sitemap import Sitemap
from icalendar import Calendar, Event
from jinja2 import TemplateNotFound
from lxml import html, objectify
from werkzeug.middleware.proxy_fix import ProxyFix
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NEWS_URL = 'https://discuss.tryton.org/c/news'
NEWS_RSS_URL = NEWS_URL + '.rss'
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CALENDAR_URL = 'https://discuss.tryton.org/upcoming-events'
CALENDAR_JSON = 'https://discuss.tryton.org/discourse-post-event/events.json'
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SUPPORTERS_URL = (
    'https://foundation.tryton.org:9000/foundation/foundation/1/supporters')
DONATORS_URL = (
    'https://foundation.tryton.org:9000/foundation/foundation/1/donators'
    '?account=732&account=734&duration=730')
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DONATIONS_URL = (
    'https://foundation.tryton.org:9000/foundation/foundation/1/donations'
    '?account=732&account=734')
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CRITICAL_CSS_DIR = os.environ.get('CRITICAL_CSS')
CRITICAL_CSS_COOKIE = 'critical-css'
cache = Cache(config={'CACHE_TYPE': 'simple'})
if os.environ.get('MEMCACHED'):
    cache.config['CACHE_TYPE'] = 'memcached'
    cache.config['CACHE_MEMCACHED_SERVERS'] = (
        os.environ['MEMCACHED'].split(','))
app = Flask(__name__)
app.wsgi_app = ProxyFix(app.wsgi_app)
app.config['SEND_FILE_MAX_AGE_DEFAULT'] = datetime.timedelta(days=365)
app.config['CACHE_DEFAULT_TIMEOUT'] = 60 * 60
app.config['PREFERRED_URL_SCHEME'] = 'https'
app.config['SERVER_NAME'] = os.environ.get('SERVER_NAME')
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app.config['SITEMAP_INCLUDE_RULES_WITHOUT_PARAMS'] = True
app.config['SITEMAP_VIEW_DECORATORS'] = [cache.cached()]
app.config['SITEMAP_IGNORE_ENDPOINTS'] = [
    'news-alt', 'news_rss', 'event-alt', 'success_stories-alt', 'download-alt',
    'presentations-alt', 'contribute-alt', 'foundation-alt', 'supporters-alt',
    'donate-alt', 'donate_thanks', 'donate_cancel', 'service_providers-alt',
    'sitemap.xml']
app.config['DOWNLOADS_DOMAIN'] = os.environ.get(
    'DOWNLOADS_DOMAIN', 'downloads.tryton.org')
app.config['VIDEOS_DOMAIN'] = os.environ.get(
    'VIDEOS_DOMAIN', 'videos.tryton.org')
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app.config['CDN_DOMAIN'] = os.environ.get('CDN_DOMAIN')
app.config['CDN_HTTPS'] = ast.literal_eval(os.environ.get('CDN_HTTPS', 'True'))
app.config['SITEMAP_IGNORE_ENDPOINTS'] = ['events', 'events-alt', 'events-ics']
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app.config['GRAVATAR_SIZE'] = 198
app.config['GRAVATAR_DEFAULT'] = 'mp'
app.config['GRAVATAR_USE_SSL'] = True
if app.config['CDN_DOMAIN']:
    app.config['GRAVATAR_BASE_URL'] = '%s://%s/' % (
        'https' if app.config['CDN_HTTPS'] else 'http',
        app.config['CDN_DOMAIN'])
else:
    app.config['GRAVATAR_BASE_URL'] = '/'
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app.jinja_env.lstrip_blocks = True
app.jinja_env.trim_blocks = True
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cache.init_app(app)
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CDN(app)
gravatar = Gravatar(app)
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sitemap = Sitemap(app=app)
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def url_for_self(**args):
    return url_for(request.endpoint, **dict(request.args, **args))


@app.context_processor
def inject_self():
    return dict(url_for_self=url_for_self)


def json_default(o):
    if hasattr(o, '__json__'):
        return o.__json__()
    raise TypeError(f'Object of type {o.__class__.__name__} '
        f'is not JSON serializable')


app.jinja_env.policies['json.dumps_kwargs'] = {
    'sort_keys': True,
    'default': json_default,
    }


_slugify_strip_re = re.compile(r'[^\w\s-]')
_slugify_hyphenate_re = re.compile(r'[-\s]+')


@app.template_filter('slugify')
def slugify(value):
    if not isinstance(value, str):
        value = str(value)
    value = unicodedata.normalize('NFKD', value)
    value = str(_slugify_strip_re.sub('', value).strip())
    return _slugify_hyphenate_re.sub('-', value)

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def url_for_downloads(*args):
    return urljoin(
        '//' + app.config['DOWNLOADS_DOMAIN'], os.path.join(*map(quote, args)))


@app.context_processor
def inject_url_for_dowloads():
    return dict(url_for_downloads=url_for_downloads)


def url_for_videos(*args):
    return urljoin(
        '//' + app.config['VIDEOS_DOMAIN'], os.path.join(*map(quote, args)))


@app.context_processor
def inject_url_for_videos():
    return dict(url_for_videos=url_for_videos)


def cdn_url_for(*args, **kwargs):
    if app.config['CDN_DOMAIN']:
        return _cdn_url_for(*args, **kwargs)
    else:
        return url_for(*args, **kwargs)


def cache_key_prefix_view():
    scheme = 'https' if request.is_secure else 'http'
    if not request.cookies.get(CRITICAL_CSS_COOKIE):
        return 'view/%s/%s/%s' % (
            scheme, request.path, critical_css(timestamp=True))
    else:
        return 'view/%s/%s' % (scheme, request.path)
LinkHeader = namedtuple(
    'LinkHeader', ['endpoint', 'values', 'params'])
PRECONNECT_HEADERS = [
    LinkHeader('index', {}, {'rel': 'preconnect'}),
    LinkHeader('static', {'filename': 'js/main.js'}, {
            'rel': 'preload', 'as': 'script', 'nopush': True}),
    ]
CSS_LINK_HEADERS = [
    LinkHeader(
        'static', {'filename': 'css/main.css'}, {
            'rel': 'preload', 'as': 'style', 'nopush': True}),
    LinkHeader(
        'static', {'filename': 'fonts/RobotoCondensed-Regular.woff2'}, {
            'rel': 'preload', 'as': 'font', 'nopush': True,
        'static', {'filename': 'fonts/material-icons.woff2'}, {
            'rel': 'preload', 'as': 'font', 'nopush': True,
    ]


def add_links(links):
    def format_param(param):
        key, value = param
        if value is True:
            return key
        else:
            return '%s=%s' % (key, value)

    def decorator(func):
        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            response = make_response(func(*args, **kwargs))
            for link in links:
                if (link.endpoint == 'index'
                        or (link.endpoint == 'static'
                            and link.values.get(
                                'filename', '').startswith('fonts/'))):
                    if (app.config['CDN_DOMAIN']
                            and not app.config['CDN_DEBUG']):
                        urls = app.url_map.bind(
                            app.config['CDN_DOMAIN'], url_scheme='https')
                        url = urls.build(
                            link.endpoint, link.values, force_external=True)
                        url = url_for(link.endpoint, **link.values)
                    url = cdn_url_for(link.endpoint, **link.values)
                params = '; '.join(map(format_param, link.params.items()))
                value = '<{url}>; {params}'.format(
                    url=url,
                    params=params)
                response.headers.add('Link', value)
            return response
        return wrapper
    return decorator


@app.after_request
def add_cache_control_header(response):
    if 'Cache-Control' not in response.headers:
        response.cache_control.max_age = app.config['CACHE_DEFAULT_TIMEOUT']
        response.cache_control.public = True
    return response


def url_for_canonical(endpoint=None, **values):
    if endpoint is None:
        endpoint = request.endpoint
    if not endpoint:
        return ''
    scheme = 'https' if not app.debug else None
    return url_for(endpoint, _external=True, _scheme=scheme, **values)


@app.context_processor
def inject_canonical():
    return dict(url_for_canonical=url_for_canonical)


def critical_css(timestamp=False):
    if (CRITICAL_CSS_DIR
            and request.endpoint
            and not request.cookies.get(CRITICAL_CSS_COOKIE)):
        file = os.path.join(CRITICAL_CSS_DIR, request.endpoint + '.css')
        if os.path.exists(file):
            if timestamp:
                return int(os.path.getmtime(file))
            else:
                return open(file, 'r').read()


@app.after_request
def add_critical_css_cookie(response):
    if (CRITICAL_CSS_DIR
            and response.mimetype == 'text/html'
            and not request.cookies.get(CRITICAL_CSS_COOKIE)):
        response.set_cookie(CRITICAL_CSS_COOKIE, '1')
    return response


@app.context_processor
def inject_critical_css():
    return dict(critical_css=critical_css)


@cache.memoize(timeout=365 * 24 * 60 * 60)
def dominant_color(path):
    if app.debug:
        return '#000'
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    try:
        color = ColorThief(
            os.path.join(app.static_folder, path)).get_color(quality=1)
    except Exception:
        return '#000'
    return '#%02x%02x%02x' % color


@app.context_processor
def inject_dominant_color():
    return dict(dominant_color=dominant_color)


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HEART = ('<span '
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    'class="material-icons beat" aria-hidden="true" '
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    'style="color:#d9534f; font-size: inherit; vertical-align: middle">'
    'favorite'
    '</span>')
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@app.route('/')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def index():
    return render_template(
        'index.html',
        news=list(news_items(3)),
        next_events=next_events(3))


@app.context_processor
def inject_menu():
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    menu = OrderedDict()
    menu['Tryton'] = [
        ('Success Stories', url_for('success_stories')),
        ('News', url_for('news')),
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        ('Get Tryton', url_for('download')),
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        ('Documentation', '//docs.tryton.org/'),
        ('Code', '//code.tryton.org/'),
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        ]
    menu['Community'] = [
        ('Forum', url_for('forum')),
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        ('Presentations', url_for('presentations')),
        ('Get Help', 'https://discuss.tryton.org/c/support'),
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        ('Contribute', url_for('contribute')),
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        ]
    menu['Foundation'] = [
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        ('About', url_for('foundation')),
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        ('Supporters', url_for('supporters')),
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        (HEART + ' Donations', url_for('donate')),
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        ]
    menu['Services'] = [
        ('Service Providers', url_for('service_providers')),
        ('Become a Service Provider', url_for('service_providers_start')),
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    return dict(menu=menu, datetime=datetime)
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@app.context_processor
def inject_copyright_dates():
    return dict(copyright_dates='2008-%s' % datetime.date.today().year)


@app.context_processor
def inject_heart():
    return dict(heart=HEART)


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@app.route('/robots.txt')
@cache.cached()
def static_from_root():
    response = make_response(render_template('robots.txt'))
    response.mimetype = 'text/plain'
    return response


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@app.route('/news')
@app.route('/news/index.html', endpoint='news-alt')
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def news():
    return redirect(NEWS_URL)


@app.route('/news.rss')
@app.route('/rss.xml')
def news_rss():
    return redirect(NEWS_RSS_URL)
@cache.memoize(timeout=60 * 60)
def fetch_news_items():
    return requests.get(NEWS_RSS_URL).content


def news_items(size=-1):
    try:
        root = objectify.fromstring(fetch_news_items())
    except Exception:
        app.logger.error('fail to fetch news', exc_info=True)
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    for item in root.xpath('/rss/channel/item')[:size]:
        yield item


@app.template_filter('news_text')
def news_text(content):
    block = html.fromstring(str(content))
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    for box in block.find_class('lightbox-wrapper'):
        box.drop_tree()
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    return block.text_content().strip()
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@app.route('/events')
@app.route('/events.html', endpoint='events-alt')
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def events():
    return redirect(CALENDAR_URL)


@app.route('/events.ics', endpoint='events-ics')
def events_ics():
    response = make_response(fetch_events())
    response.mimetype = 'text/calendar'
    return response


@cache.memoize(timeout=60 * 60 * 24)
def fetch_events():
    def parse_dt(value):
        return datetime.datetime.fromisoformat(value.rstrip('Z'))
    data = requests.get(CALENDAR_JSON).json()
    calendar = Calendar()
    for data in requests.get(CALENDAR_JSON).json()['events']:
        event = Event()
        if data.get('starts_at'):
            event.add('dtstart', parse_dt(data['starts_at']))
        if data.get('ends_at'):
            event.add('dtend', parse_dt(data['ends_at']))
        event['summary'] = data['name']
        event['url'] = urljoin(CALENDAR_JSON, data['post']['url'])
        calendar.add_component(event)
    return calendar.to_ical()


def next_events(size=-1):
    today = datetime.date.today()
    try:
        cal = Calendar.from_ical(fetch_events())
    except Exception:
        app.logger.error('fail to fetch events', exc_info=True)
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    events = []
    for event in cal.walk('vevent'):
        end_date = (event.get('dtend') or event.get('dtstart')).dt
        if date(end_date) >= today:
            events.append(event)

    def start_date(event):
        return date(event.get('dtstart').dt)

    return sorted(events, key=start_date)[:size]


@app.template_filter('date')
def date(datetime):
    if hasattr(datetime, 'date'):
        return datetime.date()
    return datetime


class Case:
    def __init__(self, title, description, story=False):
        self.title = title
        self.description = description
        self.story = story

    @property
    def name(self):
        return slugify(self.title.lower())

    @property
    def url(self):
        if self.story:
            return url_for('success_story', story=self.name)

    @property
    def logo(self):
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        return 'images/success-stories/%s.webp' % self.name
    def __eq__(self, other):
        if isinstance(other, str):
            return self.name == other
        elif isinstance(other, Case):
            return self.name == other.name
        return NotImplemented

    Case(title="ALS Swiss",
        description="A society for people suffering ALS disease.",
        story=True),
    Case(title="APAR @ AIIMS",
        description="Annual Performance Appraisal for the All Indian "
        "Institute of Medical Sciences",
        story=True),
        title="Advocate Consulting Legal Group",
        description="A legal firm servicing the general aviation industry",
        story=True),
    Case(
        title="Banque Française Mutualiste",
        description="A French bank for the public service."),
    Case(
        title="Blue Box Distribution",
        description="An international distributor of hair care products.",
        story=True),
    Case(
        title="CAMIR",
        description="A provider of spare parts for machinery.",
        story=True),
    Case(
        title="La Cave Thrace",
        description="Imports and distributes wine in France."),
    Case(
        title="Cultural Commons Collection Society",
        description="Collects and distributes music royalties."),
    Case(
        title="Expertise Vision",
        description="Produces vision based systems.",
        story=True),
    Case(
        title="Felber",
        description="A stamp and signalisation company.",
        story=True),
    Case(
        title="GotSHO LIMS",
        description="Software Solution for genomic world.",
        story=True),
    Case(
        title="Grufesa",
        description="Exports strawberries in Europe.",
        story=True),
    Case(
        title="Institut Mèdic per la Imatge",
        description="Provides all kinds of MRI scans, nuclear medicine "
        "and bone densitometry."),
    Case(
        title="Jordà",
        description="Installs and maintains lifts and elevators.",
        story=True),
    Case(
        title="Legna",
        description="Graphic design, digital printing "
        "and offset solution company",
        story=True),
    Case(
        title="Koolvet",
        description="Software for veterinary clinics that deal with small "
        "domestic pets and larger farm animals.",
        story=True),
    Case(
        title="MenschensKinder Teltow",
        description="Operates municipal day care centers and "
        "parent-child groups."),
    Case(
        title="Mifarma",
        description="Leading online parapharmacy.",
        story=True),
    Case(
        title="Lackierzentrum Reichenbach",
        description="Produces surface coating for automotive, aerospace, "
        "construction and mechanical engineering."),
    Case(
        title="Revelle",
        description="Consulting in developing countries and "
        "emerging economies.",
        story=True),
    Case(
        title="Sinclair Containers",
        description="Sells and rents containers.",
        story=True),
    Case(
        title="Skoda Autohaus Zeidler",
        description="A German car dealership and workshop for Skoda."),
    Case(
        title="Wenger Energie",
        description="A provider of vacuum degassing and filter systems.",
        story=True),
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@app.route('/success-stories')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def success_stories():
        sample(CASES, len(CASES)), key=attrgetter('story'), reverse=True)
    return render_template('success_stories.html', cases=cases)
@app.route('/business-cases.html', endpoint='success_stories-alt')
def success_stories_alt():
    return redirect(url_for('success_stories'))


@app.route('/success-stories/<story>')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def success_story(story):
    if story == '_':
        story = choice(CASES).name
    cases = [c for c in CASES if c.story or c.name == story]
    try:
        next_case = cases[(cases.index(story) + 1) % len(cases)]
    except ValueError:
        abort(HTTPStatus.NOT_FOUND)
            'success_stories/%s.html' % story, next_case=next_case,
            canonical=url_for_canonical(story=story))
    except TemplateNotFound:
        abort(HTTPStatus.NOT_FOUND)
@sitemap.register_generator
def success_story_generator():
    for case in CASES:
        if case.url:
            yield 'success_story', dict(story=case.name)


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@app.route('/download')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def download():
    return render_template('download.html')


@app.route('/download.html', endpoint='download-alt')
    return redirect(url_for('download'))


@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def forum():
    return render_template('forum.html')


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@app.route('/presentations')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def presentations():
    return render_template('presentations.html')


@app.route('/papers.html', endpoint='presentations-alt')
def presentations_alt():
    return redirect(url_for('presentations'))


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@app.route('/events/<event>')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def event(event):
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    class Day:
        def __init__(self, date, *events, location=None, full=False):
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            if not isinstance(date, datetime.date):
                date = datetime.date(*date)
            self.date = date
            self.full = full
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            self.events = []
            for event in events:
                self.add(*event)

        def add(self, summary, start, end, *args, location=None):
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            if not isinstance(start, datetime.time):
                start = datetime.time(*start)
            if not isinstance(end, datetime.time):
                end = datetime.time(*end)
            start = datetime.datetime.combine(self.date, start)
            end = datetime.datetime.combine(self.date, end)
            if not location:
                location = self.location
            self.events.append(Event(
                    summary, start, end, *args, location=location))
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        @property
        def start(self):
            if self.events:
                return min(e.start for e in self.events)

        @property
        def end(self):
            if self.events:
                return max(e.end for e in self.events)

    class Event:
        def __init__(self, summary, start, end, description='', profiles=(),
                location=None):
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            self.summary = summary
            self.start = start
            self.end = end
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            self.description = description
            self.profiles = [Profile(*p) for p in profiles]

    class Profile:
        def __init__(self, name, gravatar, company='', url=''):
            self.name = name
            self.gravatar = gravatar
            self.company = company
            self.url = url
        return render_template(
            'events/%s.html' % event, Day=Day,
            canonical=url_for_canonical(event=event))
    except TemplateNotFound:
        abort(HTTPStatus.NOT_FOUND)
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@app.route('/contribute')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def contribute():
    return render_template('contribute.html')


@app.route('/how-to-contribute.html', endpoint='contribute-alt')
def contribute_alt():
    return redirect(url_for('contribute'))


@app.route('/develop')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def develop():
    return render_template('develop.html')


@app.route('/develop/guidelines/code')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def guidelines_code():
    return render_template('guidelines/code.html')


@app.route('/develop/guidelines/documentation')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def guidelines_documentation():
    return render_template('guidelines/documentation.html')


@app.route('/develop/guidelines/help-text')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def guidelines_documentation_help():
    return render_template('guidelines/help.html')


@app.route('/develop/guidelines/howto')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def guidelines_documentation_howto():
    return render_template('guidelines/howto.html')


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@app.route('/foundation')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def foundation():
    return render_template('foundation.html')


@app.route('/foundation/', endpoint='foundation-alt')
def foundation_alt():
    return redirect(url_for('foundation'))


@cache.memoize(timeout=60 * 60 * 24)
def fetch_supporters():
    headers = {'Content-Type': 'application/json'}
    try:
        response = requests.get(SUPPORTERS_URL, headers=headers)
        return response.json()
    except Exception:
        app.logger.error('fail to fetch supporters', exc_info=True)
        return []
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@app.route('/supporters')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def supporters():
    def url(supporter, start):
        for website in supporter['websites']:
            if website.startswith(start):
                return website
    return render_template('supporters.html',
        supporters=fetch_supporters(),
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        discuss_url=partial(url, start='https://discuss.tryton.org/'),
        roundup_url=partial(url, start='https://bugs.tryton.org/'),
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        heptapod_url=partial(url, start='https://foss.heptapod.net/'))
@app.route('/foundation/supporters.html', endpoint='supporters-alt')
def supporters_alt():
    return redirect(url_for('supporters'))


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@cache.memoize(timeout=60 * 60 * 24)
def fetch_gravatar(hash, **params):
    url = 'https://secure.gravatar.com/avatar/' + hash
    response = requests.get(url, params=params)
    response.raise_for_status()
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    rv = make_response(response.content)
    rv.content_type = response.headers['Content-Type']
    rv.cache_control.max_age = 60 * 60 * 24
    rv.cache_control.public = True
    return rv


@app.route('/avatar/<hash>')
@cache.cached(query_string=True)
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def avatar(hash):
    if not set(request.args.keys()).issubset(set('sdr')):
        abort(HTTPStatus.BAD_REQUEST)
    if request.args.get('s'):
        try:
            if not (1 < int(request.args.get('s')) < 2048):
                abort(HTTPStatus.BAD_REQUEST)
        except ValueError:
            abort(HTTPStatus.BAD_REQUEST)
    if request.args.get('d') and request.args.get('d') not in {
            '404', 'mp', 'identicon', 'monsterid', 'wavatar', 'retro',
            'robohash', 'blank'}:
        abort(HTTPStatus.BAD_REQUEST)
    if request.args.get('r') and request.args.get('r') not in {
            'g', 'pg', 'r', 'x'}:
        abort(HTTPStatus.BAD_REQUEST)
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    return fetch_gravatar(hash, **request.args)


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@app.template_filter('hostname')
def hostname(url):
    return urlparse(url).hostname


@app.template_filter('url_local')
def url_local(url):
    return urlparse(url)._replace(scheme='', netloc='').geturl()


@cache.memoize(timeout=60 * 60 * 24)
def fetch_donators():
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    headers = {'Content-Type': 'application/json'}
    try:
        response = requests.get(DONATORS_URL, headers=headers)
        return response.json()
    except Exception:
        app.logger.error('fail to fetch donators', exc_info=True)
        return []


@cache.memoize(timeout=60 * 60 * 24)
def fetch_donations():
    headers = {'Content-Type': 'application/json'}
    try:
        response = requests.get(DONATIONS_URL, headers=headers)
        return response.json()
    except Exception:
        app.logger.error('fail to fetch donations', exc_info=True)
        return []


@app.route('/donate')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def donate():
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    return render_template('donate.html',
        donators=fetch_donators(),
        donations=fetch_donations())
@app.route('/foundation/donations.html', endpoint='donate-alt')
    return redirect(url_for('donate'))


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@app.route('/donate/thanks')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def donate_thanks():
    return render_template('donate_thanks.html')


@app.route('/donate/cancel')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
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def donate_cancel():
    return render_template('donate_cancel.html')


class Service(enum.Flag):
    NONE = 0
    CONSULTING = enum.auto()
    DEVELOPMENT = enum.auto()
    HOSTING = enum.auto()
    TRAINING = enum.auto()


class Provider:
    def __init__(self, name, positions, services=Service.NONE):
        self.name = name
        self.positions = positions
        self.services = services

    def __getattr__(self, name):
        if self.services:
            return self.services & getattr(Service, name.upper())

    def __json__(self):
        return {
            'name': self.name,
            'positions': self.positions,
            }


PROVIDERS = [
    Provider(name="Adiczion",
        positions=[(43.52153, 5.43150)],
        services=Service.CONSULTING | Service.DEVELOPMENT),
    Provider(name="B2CK",
        positions=[(50.631123, 5.567552)],
        services=Service.CONSULTING | Service.DEVELOPMENT | Service.TRAINING),
    Provider(name="Coopengo",
        positions=[(48.873278, 2.324776)],
        services=Service.DEVELOPMENT),
    Provider(name="Datalife",
        positions=[(37.9596885, -1.2086241)],
        services=Service.CONSULTING | Service.DEVELOPMENT),
    Provider(name="First Telecom",
        positions=[(38.0131591, 23.7721521)],
        services=Service.CONSULTING),
    Provider(name="gcoop",
        positions=[(-34.59675, -58.43035)],
        services=Service.CONSULTING | Service.DEVELOPMENT),
    Provider(name="IntegraPer",
        positions=[(-11.9753824, -77.0860785)],
        services=Service.CONSULTING | Service.DEVELOPMENT),
    Provider(name="INROWGA",
        positions=[(18.476389, -69.893333)],
        services=Service.CONSULTING),
    Provider(name="Kopen Software",
        positions=[(41.5995983, 0.5799085)],
        services=Service.CONSULTING | Service.DEVELOPMENT | Service.HOSTING
        | Service.TRAINING),
    Provider(name="Lampero",
        positions=[(44.4758631, 25.8231538)],
        services=Service.CONSULTING),
    Provider(name="Lava Lab Software",
        positions=[(-27.978905, 153.389466)],
        services=Service.CONSULTING | Service.DEVELOPMENT),
    Provider(name="m-ds",
        positions=[(52.520008, 13.404954)],
        services=Service.CONSULTING | Service.DEVELOPMENT),
    Provider(name="NaN-tic",
        positions=[(41.544063, 2.115122)],
        services=Service.CONSULTING | Service.DEVELOPMENT),
    Provider(name="power solutions",
        positions=[(47.0467674, 8.3048232)],
        services=Service.CONSULTING | Service.DEVELOPMENT | Service.HOSTING),
    Provider(name="SISalp",
        positions=[(45.903956, 6.099937), (43.132028, 5.935532)],
        services=Service.CONSULTING | Service.HOSTING),
    Provider(name="Virtual Things",
        positions=[(48.13585, 11.577415), (50.775116, 6.083565)],
        services=Service.CONSULTING | Service.DEVELOPMENT | Service.TRAINING),
@app.route('/service-providers')
@cache.cached(key_prefix=cache_key_prefix_view, query_string=True)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def service_providers():
    providers = PROVIDERS.copy()
    shuffle(providers)
    services = []
    environ = {}
    filters = {'consulting', 'development', 'hosting', 'training'}
    if not (request.args.keys() <= filters):
        abort(HTTPStatus.BAD_REQUEST)
    for filter_name in filters:
        environ[filter_name] = request.args.get(filter_name, type=int)
        if (environ[filter_name] is not None
                and environ[filter_name] not in {0, 1}):
            abort(HTTPStatus.BAD_REQUEST)
        if environ[filter_name]:
            services.append(getattr(Service, filter_name.upper()))
    if services:
        services = functools.reduce(operator.ior, services)
        providers = list(
            filter(lambda p: (p.services & services) == services, providers))
    return render_template(
        'service_providers.html', providers=providers, **environ)
@app.route('/services.html', endpoint='service_providers-alt')
def service_providers_alt():
    return redirect(url_for('service_providers'))


@app.route('/service-providers/start')
@cache.cached(key_prefix=cache_key_prefix_view)
@add_links(PRECONNECT_HEADERS + JS_LINK_HEADERS + CSS_LINK_HEADERS)
def service_providers_start():
    return render_template('service_providers_start.html')