app/utils.py

   1 # Content DB
   2 # Copyright (C) 2018  rubenwardy
   3 #
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  16
  17
  18 from flask import request, flash, abort, redirect
  19 from flask_user import *
  20 from flask_login import login_user, logout_user
  21 from app.models import *
  22 from app import app
  23 import random, string, os
  24
  25 def getExtension(filename):
  26         return filename.rsplit(".", 1)[1].lower() if "." in filename else None
  27
  28 def isFilenameAllowed(filename, exts):
  29         return getExtension(filename) in exts
  30
  31 def shouldReturnJson():
  32         return "application/json" in request.accept_mimetypes and \
  33                         not "text/html" in request.accept_mimetypes
  34
  35 def randomString(n):
  36         return ''.join(random.choice(string.ascii_lowercase + \
  37                         string.ascii_uppercase + string.digits) for _ in range(n))
  38
  39 def doFileUpload(file, allowedExtensions, fileTypeName):
  40         if not file or file is None or file.filename == "":
  41                 flash("No selected file", "error")
  42                 return None
  43
  44         ext = getExtension(file.filename)
  45         if ext is None or not ext in allowedExtensions:
  46                 flash("Please upload load " + fileTypeName, "error")
  47                 return None
  48
  49         filename = randomString(10) + "." + ext
  50         file.save(os.path.join("app/public/uploads", filename))
  51         return "/uploads/" + filename
  52
  53
  54 def _do_login_user(user, remember_me=False):
  55         def _call_or_get(v):
  56                 if callable(v):
  57                         return v()
  58                 else:
  59                         return v
  60
  61         # User must have been authenticated
  62         if not user:
  63                 return False
  64
  65         user.active = True
  66         if not user.rank.atLeast(UserRank.NEW_MEMBER):
  67                 user.rank = UserRank.NEW_MEMBER
  68
  69         db.session.commit()
  70
  71         # Check if user account has been disabled
  72         if not _call_or_get(user.is_active):
  73                 flash("Your account has not been enabled.", "error")
  74                 return False
  75
  76         # Check if user has a confirmed email address
  77         user_manager = current_app.user_manager
  78         if user_manager.enable_email and user_manager.enable_confirm_email \
  79                         and not current_app.user_manager.enable_login_without_confirm_email \
  80                         and not user.has_confirmed_email():
  81                 url = url_for("user.resend_confirm_email")
  82                 flash("Your email address has not yet been confirmed", "error")
  83                 return False
  84
  85         # Use Flask-Login to sign in user
  86         login_user(user, remember=remember_me)
  87         signals.user_logged_in.send(current_app._get_current_object(), user=user)
  88
  89         flash("You have signed in successfully.", "success")
  90
  91         return True
  92
  93 def loginUser(user):
  94         user_mixin = None
  95         if user_manager.enable_username:
  96                 user_mixin = user_manager.find_user_by_username(user.username)
  97
  98         return _do_login_user(user_mixin, False)
  99
 100 def rank_required(rank):
 101         def decorator(f):
 102                 @wraps(f)
 103                 def decorated_function(*args, **kwargs):
 104                         if not current_user.is_authenticated:
 105                                 return redirect(url_for("user.login"))
 106                         if not current_user.rank.atLeast(rank):
 107                                 abort(403)
 108
 109                         return f(*args, **kwargs)
 110
 111                 return decorated_function
 112         return decorator
 113
 114 def getPackageByInfo(author, name):
 115         user = User.query.filter_by(username=author).first()
 116         if user is None:
 117                 abort(404)
 118
 119         package = Package.query.filter_by(name=name, author_id=user.id, soft_deleted=False).first()
 120         if package is None:
 121                 abort(404)
 122
 123         return package
 124
 125 def is_package_page(f):
 126         @wraps(f)
 127         def decorated_function(*args, **kwargs):
 128                 if not ("author" in kwargs and "name" in kwargs):
 129                         abort(400)
 130
 131                 package = getPackageByInfo(kwargs["author"], kwargs["name"])
 132
 133                 del kwargs["author"]
 134                 del kwargs["name"]
 135
 136                 return f(package=package, *args, **kwargs)
 137
 138         return decorated_function
 139
 140 def triggerNotif(owner, causer, title, url):
 141         if owner.rank.atLeast(UserRank.NEW_MEMBER) and owner != causer:
 142                 Notification.query.filter_by(user=owner, url=url).delete()
 143                 notif = Notification(owner, causer, title, url)
 144                 db.session.add(notif)
 145
 146 def clearNotifications(url):
 147         if current_user.is_authenticated:
 148                 Notification.query.filter_by(user=current_user, url=url).delete()
 149                 db.session.commit()