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#!venv/bin/python

from flask import Flask, render_template, jsonify, request
from flask_sqlalchemy import SQLAlchemy
from lxml import etree
from argparse import ArgumentParser
import requests
import json

# Use this on FreeBSD when you've compiled pyopenssl with openssl from ports
# import urllib3.contrib.pyopenssl
# urllib3.contrib.pyopenssl.inject_into_urllib3()

parser = ArgumentParser(description="C3 rating helper")
parser.add_argument("-i", action="store_true", dest="frab_import", default=False, help="import events from frab")
parser.add_argument("-c", "--config", help="Config file location", default="./config.json")
args = parser.parse_args()

with open(args.config, mode="r", encoding="utf-8") as json_file:
    config_data = json.load(json_file)

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///'+config_data.get('frab-conference')+'-'+config_data.get('track')+'.db'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['SECRET_KEY'] = 'Silence is golden. Gerd Eist.'
app.jinja_env.trim_blocks = True
app.jinja_env.lstrip_blocks = True

db = SQLAlchemy(app)

class Event(db.Model):
    """An event as dumped from frab"""
    frab_id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(1024))
    subtitle = db.Column(db.String(1024))
    abstract = db.Column(db.Text())
    description = db.Column(db.Text())
    state = db.Column(db.String(64))
    event_type = db.Column(db.String(64))
    speakers = db.Column(db.String(1024))
    coordinator = db.Column(db.String(1024))
    notes = db.Column(db.Text())

class EventRating(db.Model):
    """A rating as given by a logged in user"""
    id = db.Column(db.Integer, primary_key=True)
    submitter = db.Column(db.String(1024))
    event_id = db.Column(db.Integer, db.ForeignKey('event.frab_id'))
    event = db.relationship('Event', backref=db.backref('ratings', lazy='dynamic'))
    comment = db.Column(db.Text())
    rating_dict = db.Column(db.String(1024), server_default="{}")

@app.route("/")
def root():
    events = Event.query.all()
    return render_template('index.html', events=events, json=json, config=config_data, cat=config_data.get('categories'))

@app.route('/api/ratings')
def get_ratings():
    return jsonify(EventRating.query.all())

@app.route('/api/set_event_state/<eventid>', methods=['POST'])
def set_sevent_state(eventid):
    content = request.json
    dbevent = Event.query.get(eventid)
    dbevent.state = content.get('state', 'new')
    db.session.commit()
    return jsonify({"result":"ok"})

@app.route('/api/set_event_coordinator/<eventid>', methods=['POST'])
def set_sevent_coordinator(eventid):
    content = request.json
    dbevent = Event.query.get(eventid)
    dbevent.coordinator = content['coordinator']
    db.session.commit()
    return jsonify({"result":"ok"})

@app.route('/api/remove_event/<eventid>', methods=['POST'])
def remove_event(eventid):
    dbevent = Event.query.get(eventid)
    if dbevent.state == 'gone':
        db.session.delete(dbevent)
    db.session.commit()
    return jsonify({"result":"ok"})

@app.route('/api/remove_rating/<eventid>', methods=['POST'])
def remove_rating(eventid):
    content = request.json
    rating = EventRating.query.filter_by(event_id = eventid, submitter = content['author']).first()
    if rating:
        db.session.delete(rating)
        db.session.commit()
    return jsonify({"result":"ok"})

@app.route('/api/add_rating/<eventid>', methods=['POST'])
def add_rating(eventid):
    content = request.json
    print ( str(eventid) + " " + str(content))
    r = content.get('ratings', '{}');

    rating = EventRating.query.filter_by(event_id = eventid, submitter = content['author']).first()

    rd = json.dumps({ k: r.get(k,'0') for k in ['category1', 'category2', 'category3', 'category4'] })
    if rating:
        if 'comment' in content:
            rating.comment = content['comment']
        rating.rating_dict = rd
    else:
        db.session.add( EventRating( submitter = content.get('author','anonymous'), event_id = eventid, comment = content['comment'], rating_dict = rd))

    db.session.commit()
    return jsonify({"result":"ok"})

def fetch_talks(config):
    sess = requests.Session()
    new_session_page = sess.get(config.get('frab-url'))
    tree = etree.HTML(new_session_page.text)
    auth_token = tree.xpath("//meta[@name='csrf-token']")[0].get("content")
    login_data = dict()
    login_data['user[email]'] = config.get('frab-user')
    login_data['user[password]'] = config.get('frab-password')
    login_data['user[remember_me]'] = 1
    login_data['authenticity_token'] = auth_token

    frab = config.get('frab-url')
    conf = config.get('frab-conference')
    track = config.get('track-name')

    sess.post(frab + 'users/sign_in?conference_acronym=' + conf + '&locale=en', login_data, verify=False)
    response = sess.get(frab + 'en/'+conf+'/events?track_name=' + track + '&format=json', verify=False, stream=True)

    talks_json = json.loads(response.text)

#    with open('dump.txt', mode='wb') as localfile:
#        localfile.write(response.content)

    imported = 0
    for json_event in talks_json['events']:
#        print (json_event)
        rawhtml = sess.get(frab + 'en/' + conf + '/events/'+ str(json_event['id']), verify=False, stream=True)
        tree = etree.HTML(rawhtml.text)
        submission_notes = tree.xpath('//b[text()="Submission Notes(user and admin):"]')[0].tail.strip()

        dbevent = Event.query.get(json_event['id'])
        speakers = { speaker['id']: speaker['full_public_name'] for speaker in json_event['speakers'] }
        if dbevent:
            dbevent.title = json_event['title']
            dbevent.subtitle = json_event['subtitle']
            dbevent.abstract = json_event['abstract']
            dbevent.description = json_event['description']
            dbevent.event_type = json_event['type']
            dbevent.notes = submission_notes
            if 'state' in json_event:
                if json_event['state'] != 'new' or dbevent.state == 'gone':
                    dbevent.state = json_event['state']
            dbevent.speakers = json.dumps(speakers)
        else:
            db.session.add( Event( frab_id = json_event['id'], title = json_event['title'], subtitle = json_event['subtitle'], abstract = json_event['abstract'], description = json_event['description'], speakers = json.dumps(speakers), state = json_event.get('state', 'new'), event_type = json_event['type'], notes = submission_notes) )
            imported += 1
    for goner in Event.query.filter( Event.frab_id.notin_([ ev['id'] for ev in talks_json['events'] ])).all():
        goner.state = 'gone'
    db.session.commit()
    print ('Conference: ' + conf + ', track: ' + track + ', imported ' + str(len(talks_json['events'])) + ' events, ' + str(imported) + ' new.')


if __name__ == "__main__":
    db.create_all()
    if args.frab_import:
        fetch_talks(config_data)
    else:
        app.run(host=config_data.get('host'), port=int(config_data.get('port')))