motion.py

   1 from flask import g
   2 from flask import Flask
   3 from flask import render_template, redirect
   4 from flask import request
   5 from functools import wraps
   6 import postgresql
   7 import filters
   8 from flaskext.markdown import Markdown
   9 from markdown.extensions import Extension
  10 from datetime import date, time, datetime
  11
  12 def get_db():
  13     db = getattr(g, '_database', None)
  14     if db is None:
  15         db = g._database = postgresql.open(app.config.get("DATABASE"), user=app.config.get("USER"), password=app.config.get("PASSWORD"))
  16     #db.row_factory = sqlite3.Row
  17     return db
  18
  19 app = Flask(__name__)
  20 app.register_blueprint(filters.blueprint)
  21
  22 class EscapeHtml(Extension):
  23     def extendMarkdown(self, md, md_globals):
  24         del md.preprocessors['html_block']
  25         del md.inlinePatterns['html']
  26
  27 md = Markdown(app, extensions=[EscapeHtml()])
  28
  29 class default_settings(object):
  30     COPYRIGHTSTART="2017"
  31     COPYRIGHTNAME="WPIA"
  32     COPYRIGHTLINK="https://wpia.club"
  33     IMPRINTLINK="https://documents.wpia.club/imprint.html"
  34     DATAPROTECTIONLINK="https://documents.wpia.club/data_privacy_policy_html_pages_en.html"
  35
  36
  37 # Load config
  38 app.config.from_object('motion.default_settings')
  39 app.config.from_pyfile('config.py')
  40
  41
  42 class ConfigProxy:
  43     def __init__(self, name):
  44         self.name = name
  45     @property
  46     def per_host(self):
  47         dict = app.config.get(self.name)
  48         if dict is None:
  49             return None
  50         return dict.get(request.host)
  51
  52 prefix = ConfigProxy("GROUP_PREFIX")
  53 times = ConfigProxy("DURATION")
  54 debuguser = ConfigProxy("DEBUGUSER")
  55
  56 @app.before_request
  57 def lookup_user():
  58     global prefix
  59
  60     env = request.environ
  61     user = None
  62     my_debuguser = debuguser.per_host
  63     if my_debuguser is not None:
  64         parts = my_debuguser.split("/", 1)
  65         user = parts[0]
  66         roles = parts[1]
  67
  68     if "USER_ROLES" in env:
  69         parts = env.get("USER_ROLES").split("/", 1)
  70         user = parts[0]
  71         roles = parts[1]
  72
  73     if "USER" in env and "ROLES" in env:
  74         user = env.get("USER")
  75         roles = env.get("ROLES")
  76
  77     if user is None:
  78         return "Server misconfigured", 500
  79     roles = roles.split(" ")
  80
  81     if user == "<invalid>":
  82         return "Access denied", 403;
  83
  84     db = get_db()
  85     with db.xact():
  86         rv = db.prepare("SELECT id FROM voter WHERE email=$1")(user)
  87         if len(rv) == 0:
  88             db.prepare("INSERT INTO voter(\"email\") VALUES($1)")(user)
  89             rv = db.prepare("SELECT id FROM voter WHERE email=$1")(user)
  90         g.voter = rv[0].get("id");
  91     g.user = user
  92     g.roles = {}
  93
  94     for r in roles:
  95         a = r.split(":", 1)
  96         if len(r)!=0:
  97             val = a[1]
  98             if a[0] not in g.roles:
  99                 g.roles[a[0]] = []
 100             if val == "*":
 101                 g.roles[a[0]] = [group for group in prefix.per_host]
 102             else:
 103                 g.roles[a[0]].append(val)
 104     return None
 105
 106 @app.context_processor
 107 def init_footer_variables():
 108     if int(app.config.get("COPYRIGHTSTART"))<datetime.now().year:
 109         version_year = "%s - %s" % (app.config.get("COPYRIGHTSTART"), datetime.now().year)
 110     else:
 111         version_year = datetime.now().year
 112
 113     return dict(
 114         footer = dict( version_year=version_year,
 115             copyright_link=app.config.get("COPYRIGHTLINK"),
 116             copyright_name=app.config.get("COPYRIGHTNAME"),
 117             imprint_link=app.config.get("DATAPROTECTIONLINK"),
 118             dataprotection_link=app.config.get("DATAPROTECTIONLINK")
 119         )
 120     )
 121
 122
 123 def get_allowed_cats(action):
 124     return g.roles.get(action, []);
 125
 126 def may(action, motion):
 127     return motion in get_allowed_cats(action)
 128
 129 @app.teardown_appcontext
 130 def close_connection(exception):
 131     db = getattr(g, '_database', None)
 132     if db is not None:
 133         db.close()
 134
 135 def init_db():
 136     with app.app_context():
 137         db = get_db()
 138         try:
 139             ver = db.prepare("SELECT version FROM schema_version")()[0][0];
 140             print("Database Schema version: ", ver)
 141         except postgresql.exceptions.UndefinedTableError:
 142             g._database = None
 143             db = get_db()
 144             ver = 0
 145
 146         if ver < 1:
 147             with app.open_resource('sql/schema.sql', mode='r') as f:
 148                 db.execute(f.read())
 149             return
 150
 151         if ver < 2:
 152             with app.open_resource('sql/from_1.sql', mode='r') as f:
 153                 db.execute(f.read())
 154                 ct={}
 155                 for group in [group for group in prefix[app.config.get("DEFAULT_HOST")]]:
 156                     ct[group] = {"dt": "", "c": 0}
 157
 158                 p = db.prepare("UPDATE \"motion\" SET \"identifier\"=$1 WHERE \"id\"=$2")
 159                 for row in db.prepare("SELECT id, \"type\", \"posed\" FROM \"motion\" ORDER BY \"id\" ASC"):
 160                     dt=row[2].strftime("%Y%m%d")
 161                     if ct[row[1]]["dt"] != dt:
 162                         ct[row[1]]["dt"] = dt
 163                         ct[row[1]]["c"] = 0
 164                     ct[row[1]]["c"] = ct[row[1]]["c"] + 1
 165                     name=prefix[app.config.get("DEFAULT_HOST")][row[1]]+"."+dt+"."+("%03d" % ct[row[1]]["c"])
 166                     p(name, row[0])
 167                 db.prepare("ALTER TABLE \"motion\" ALTER COLUMN \"identifier\" SET NOT NULL")()
 168                 db.prepare("UPDATE \"schema_version\" SET \"version\"=2")()
 169                 db.prepare("CREATE UNIQUE INDEX motion_ident ON motion (identifier)")()
 170
 171         if ver < 3:
 172             with app.open_resource('sql/from_2.sql', mode='r') as f:
 173                 db.execute(f.read())
 174                 db.prepare("UPDATE \"motion\" SET \"host\"=$1")(app.config.get("DEFAULT_HOST"))
 175                 db.prepare("ALTER TABLE \"motion\" ALTER COLUMN \"host\" SET NOT NULL")()
 176                 db.prepare("UPDATE \"schema_version\" SET \"version\"=3")()
 177
 178 init_db()
 179
 180 @app.route("/")
 181 def main():
 182     start=int(request.args.get("start", "-1"));
 183     q = "SELECT motion.*, votes.*, poser.email AS poser, canceler.email AS canceler, (motion.deadline > CURRENT_TIMESTAMP AND canceled is NULL) AS running FROM motion LEFT JOIN (SELECT motion_id, "\
 184                              + "COUNT(CASE WHEN result='yes' THEN 'yes' ELSE NULL END) as yes, "\
 185                              + "COUNT(CASE WHEN result='no' THEN 'no' ELSE NULL END) as no, "\
 186                              + "COUNT(CASE WHEN result='abstain' THEN 'abstain' ELSE NULL END) as abstain "\
 187                              + "FROM vote GROUP BY motion_id) as votes ON votes.motion_id=motion.id "\
 188                              + "LEFT JOIN voter poser ON poser.id = motion.posed_by "\
 189                              + "LEFT JOIN voter canceler ON canceler.id = motion.canceled_by "
 190     prev=None
 191     if start == -1:
 192         p = get_db().prepare(q + "WHERE motion.host = $1 ORDER BY motion.id DESC LIMIT 11")
 193         rv = p(request.host)
 194     else:
 195         p = get_db().prepare(q + "WHERE motion.host = $1 AND motion.id <= $2 ORDER BY motion.id DESC LIMIT 11")
 196         rv = p(request.host, start)
 197         rs = get_db().prepare("SELECT id FROM motion WHERE motion.host = $1 AND motion.id > $2 ORDER BY id ASC LIMIT 10")(request.host, start)
 198         if len(rs) == 10:
 199             prev = rs[9][0]
 200         else:
 201             prev = -1
 202     return render_template('index.html', motions=rv[:10], more=rv[10]["id"] if len(rv) == 11 else None, times=times.per_host, prev=prev,
 203                            categories=get_allowed_cats("create"), singlemotion=False)
 204
 205 def rel_redirect(loc):
 206     r = redirect(loc)
 207     r.autocorrect_location_header = False
 208     return r
 209
 210 @app.route("/motion", methods=['POST'])
 211 def put_motion():
 212     cat=request.form.get("category", "")
 213     if cat not in get_allowed_cats("create"):
 214         return "Forbidden", 403
 215     time = int(request.form.get("days", "3"));
 216     if time not in times.per_host:
 217         return "Error, invalid length", 400
 218     title=request.form.get("title", "")
 219     title=title.strip()
 220     if title =='':
 221         return "Error, missing title", 400
 222     content=request.form.get("content", "")
 223     content=content.strip()
 224     if content =='':
 225         return "Error, missing content", 400
 226
 227     db = get_db()
 228     with db.xact():
 229         t = db.prepare("SELECT CURRENT_TIMESTAMP")()[0][0];
 230         s = db.prepare("SELECT MAX(\"identifier\") FROM \"motion\" WHERE \"type\"=$1 AND \"host\"=$2 AND DATE(\"posed\")=DATE(CURRENT_TIMESTAMP)")
 231         sr = s(cat, request.host)
 232         ident=""
 233         if len(sr) == 0 or sr[0][0] is None:
 234             ident=prefix.per_host[cat]+"."+t.strftime("%Y%m%d")+".001"
 235         else:
 236             ident=prefix.per_host[cat]+"."+t.strftime("%Y%m%d")+"."+("%03d" % (int(sr[0][0].split(".")[2])+1))
 237         p = db.prepare("INSERT INTO motion(\"name\", \"content\", \"deadline\", \"posed_by\", \"type\", \"identifier\", \"host\") VALUES($1, $2, CURRENT_TIMESTAMP + $3 * interval '1 days', $4, $5, $6, $7)")
 238         p(title, content, time, g.voter, cat, ident, request.host)
 239     return rel_redirect("/")
 240
 241 def motion_edited(motion):
 242     return rel_redirect("/?start=" + str(motion) + "#motion-" + str(motion))
 243
 244 def validate_motion_access(privilege):
 245     def decorator(f):
 246         def decorated_function(motion):
 247             db = get_db()
 248             with db.xact():
 249                 rv = db.prepare("SELECT id, type, deadline < CURRENT_TIMESTAMP AS expired, canceled FROM motion WHERE identifier=$1 AND host=$2")(motion, request.host);
 250                 if len(rv) == 0:
 251                     return "Error, Not found", 404
 252                 id = rv[0].get("id")
 253                 if not may(privilege, rv[0].get("type")):
 254                     return "Forbidden", 403
 255                 if rv[0].get("canceled") is not None:
 256                     return "Error, motion was canceled", 403
 257                 if rv[0].get("expired"):
 258                     return "Error, out of time", 403
 259             return f(motion, id)
 260         decorated_function.__name__ = f.__name__
 261         return decorated_function
 262     return decorator
 263
 264 @app.route("/motion/<string:motion>/cancel", methods=['POST'])
 265 @validate_motion_access('cancel')
 266 def cancel_motion(motion, id):
 267     if request.form.get("reason", "none") == "none":
 268         return "Error, form requires reason", 500
 269     rv = get_db().prepare("UPDATE motion SET canceled=CURRENT_TIMESTAMP, cancelation_reason=$1, canceled_by=$2 WHERE identifier=$3 AND host=$4 AND canceled is NULL")(request.form.get("reason", ""), g.voter, motion, request.host)
 270     return motion_edited(id)
 271
 272 @app.route("/motion/<string:motion>/finish", methods=['POST'])
 273 @validate_motion_access('finish')
 274 def finish_motion(motion, id):
 275     rv = get_db().prepare("UPDATE motion SET deadline=CURRENT_TIMESTAMP WHERE identifier=$1 AND host=$2 AND canceled is NULL")(motion, request.host)
 276     return motion_edited(id)
 277
 278 @app.route("/motion/<string:motion>")
 279 def show_motion(motion):
 280     p = get_db().prepare("SELECT motion.*, poser.email AS poser, canceler.email AS canceler, (motion.deadline > CURRENT_TIMESTAMP AND canceled is NULL) AS running, vote.result FROM motion "\
 281                          + "LEFT JOIN vote on vote.motion_id=motion.id AND vote.voter_id=$2 "\
 282                          + "LEFT JOIN voter poser ON poser.id = motion.posed_by "\
 283                          + "LEFT JOIN voter canceler ON canceler.id = motion.canceled_by "
 284                          + "WHERE motion.identifier=$1 AND motion.host=$3")
 285     rv = p(motion, g.voter, request.host)
 286     if len(rv) == 0:
 287         return "Error, Not found", 404
 288     votes = None
 289     if may("audit", rv[0].get("type")) and not rv[0].get("running") and not rv[0].get("canceled"):
 290         votes = get_db().prepare("SELECT vote.result, voter.email FROM vote INNER JOIN voter ON voter.id = vote.voter_id WHERE vote.motion_id=$1")(rv[0].get("id"));
 291     return render_template('single_motion.html', motion=rv[0], may_vote=may("vote", rv[0].get("type")), may_cancel=may("cancel", rv[0].get("type")), may_finish=may("finish", rv[0].get("type")), votes=votes, singlemotion=True)
 292
 293 @app.route("/motion/<string:motion>/vote", methods=['POST'])
 294 @validate_motion_access('vote')
 295 def vote(motion, id):
 296     v = request.form.get("vote", "abstain")
 297     db = get_db()
 298     p = db.prepare("SELECT * FROM vote WHERE motion_id = $1 AND voter_id = $2")
 299     rv = p(id, g.voter)
 300     if len(rv) == 0:
 301         db.prepare("INSERT INTO vote(motion_id, voter_id, result) VALUES($1,$2,$3)")(id, g.voter, v)
 302     else:
 303         db.prepare("UPDATE vote SET result=$3, entered=CURRENT_TIMESTAMP WHERE motion_id=$1 AND voter_id = $2")(id, g.voter, v)
 304     return motion_edited(id)