plugins/labels.py

   1 from electrum.util import print_error
   2 from electrum_gui.i18n import _
   3 import httplib, urllib
   4 import hashlib
   5 import json
   6 from urlparse import urlparse, parse_qs
   7 try:
   8     import PyQt4
   9 except:
  10     sys.exit("Error: Could not import PyQt4 on Linux systems, you may try 'sudo apt-get install python-qt4'")
  11
  12 from PyQt4.QtGui import *
  13 from PyQt4.QtCore import *
  14 import PyQt4.QtCore as QtCore
  15 import PyQt4.QtGui as QtGui
  16 from electrum_gui import bmp, pyqrnative, BasePlugin
  17 from electrum_gui.i18n import _
  18
  19 class Plugin(BasePlugin):
  20
  21     def __init__(self, gui):
  22         self.target_host = 'labelectrum.herokuapp.com'
  23         BasePlugin.__init__(self, gui, 'labels', _('Label Sync'),_('This plugin can sync your labels accross multiple Electrum installs by using a remote database to save your data. Labels are not encrypted, \
  24 transactions and addresses are however. This code might increase the load of your wallet with a few micoseconds as it will sync labels on each startup.\n\n\
  25 To get started visit http://labelectrum.herokuapp.com/ to sign up for an account.'))
  26
  27         self.wallet = gui.wallet
  28         self.gui = gui
  29         self.config = gui.config
  30         self.labels = self.wallet.labels
  31         self.transactions = self.wallet.transactions
  32
  33         self.wallet_id = hashlib.sha256(str(self.config.get("master_public_key"))).digest().encode('hex')
  34
  35         addresses = []
  36         for k, account in self.wallet.accounts.items():
  37             for address in account[0]:
  38                 addresses.append(address)
  39
  40         self.addresses = addresses
  41
  42     def auth_token(self):
  43         return self.config.get("plugin_label_api_key")
  44
  45     def init_gui(self):
  46         if self.is_enabled() and self.auth_token():
  47             # If there is an auth token we can try to actually start syncing
  48             self.full_pull()
  49
  50     def is_available(self):
  51         return True
  52
  53     def set_label(self, item,label, changed):
  54         if not changed:
  55             return
  56
  57         hashed = hashlib.sha256(item).digest().encode('hex')
  58         bundle = {"label": {"external_id": hashed, "text": label}}
  59         params = json.dumps(bundle)
  60         connection = httplib.HTTPConnection(self.target_host)
  61         connection.request("POST", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
  62
  63         response = connection.getresponse()
  64         if response.reason == httplib.responses[httplib.NOT_FOUND]:
  65             return
  66         response = json.loads(response.read())
  67
  68     def close_settings_dialog(self):
  69         # When you enable the plugin for the first time this won't exist.
  70         if self.is_enabled():
  71             if hasattr(self, 'auth_token_edit'):
  72                 self.config.set_key("plugin_label_api_key", str(self.auth_token_edit.text()))
  73             else:
  74                 QMessageBox.information(None, _("Label sync loaded"), _("Please open the settings again to configure the label sync plugin."))
  75
  76     def create_settings_tab(self, tabs):
  77         def check_for_api_key(api_key):
  78             if api_key and len(api_key) > 12:
  79               self.config.set_key("plugin_label_api_key", str(self.auth_token_edit.text()))
  80               self.upload.setEnabled(True)
  81               self.download.setEnabled(True)
  82             else:
  83               self.upload.setEnabled(False)
  84               self.download.setEnabled(False)
  85
  86         cloud_tab = QWidget()
  87         layout = QGridLayout(cloud_tab)
  88         layout.addWidget(QLabel("API Key: "),0,0)
  89
  90         self.auth_token_edit = QLineEdit(self.auth_token())
  91         self.auth_token_edit.textChanged.connect(check_for_api_key)
  92
  93         layout.addWidget(self.auth_token_edit, 0,1,1,2)
  94         layout.addWidget(QLabel("Label sync options: "),1,0)
  95
  96         self.upload = QPushButton("Force upload")
  97         self.upload.clicked.connect(self.full_push)
  98         layout.addWidget(self.upload, 1,1)
  99
 100         self.download = QPushButton("Force download")
 101         self.download.clicked.connect(lambda: self.full_pull(True))
 102         layout.addWidget(self.download, 1,2)
 103
 104         check_for_api_key(self.auth_token())
 105
 106         tabs.addTab(cloud_tab, "Label sync")
 107
 108     def full_push(self):
 109         if self.do_full_push():
 110             QMessageBox.information(None, _("Labels synced"), _("Your labels have been uploaded."))
 111
 112     def full_pull(self, force = False):
 113         if self.do_full_pull(force) and force:
 114             QMessageBox.information(None, _("Labels synced"), _("Your labels have been synced, please restart Electrum for the changes to take effect."))
 115
 116     def do_full_push(self):
 117         bundle = {"labels": {}}
 118         for key, value in self.labels.iteritems():
 119             hashed = hashlib.sha256(key).digest().encode('hex')
 120             bundle["labels"][hashed] = value
 121
 122         params = json.dumps(bundle)
 123         connection = httplib.HTTPConnection(self.target_host)
 124         connection.request("POST", ("/api/wallets/%s/labels/batch.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
 125
 126         response = connection.getresponse()
 127         if response.reason == httplib.responses[httplib.NOT_FOUND]:
 128             return
 129         try:
 130             response = json.loads(response.read())
 131         except ValueError as e:
 132             return False
 133
 134         if "error" in response:
 135             QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 136             return False
 137
 138         return True
 139
 140     def do_full_pull(self, force = False):
 141         connection = httplib.HTTPConnection(self.target_host)
 142         connection.request("GET", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())),"", {'Content-Type': 'application/json'})
 143         response = connection.getresponse()
 144         if response.reason == httplib.responses[httplib.NOT_FOUND]:
 145             return
 146         try:
 147             response = json.loads(response.read())
 148         except ValueError as e:
 149             return False
 150
 151         if "error" in response:
 152             QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 153             return False
 154
 155         for label in response:
 156             for key in self.addresses:
 157                 target_hashed = hashlib.sha256(key).digest().encode('hex')
 158                 if label["external_id"] == target_hashed:
 159                    if force or not self.labels.get(key):
 160                        self.labels[key] = label["text"]
 161             for key, value in self.transactions.iteritems():
 162                 target_hashed = hashlib.sha256(key).digest().encode('hex')
 163                 if label["external_id"] == target_hashed:
 164                    if force or not self.labels.get(key):
 165                        self.labels[key] = label["text"]
 166         return True