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 import aes
  17 import base64
  18 from electrum_gui import bmp, pyqrnative, BasePlugin
  19 from electrum_gui.i18n import _
  20 from electrum_gui.gui_classic import HelpButton
  21
  22 class Plugin(BasePlugin):
  23     def version(self):
  24         return "0.2"
  25
  26     def encode(self, message):
  27         encrypted = aes.encryptData(self.encode_password, unicode(message))
  28         encoded_message = base64.b64encode(encrypted)
  29
  30         return encoded_message
  31
  32     def decode(self, message):
  33         decoded_message = aes.decryptData(self.encode_password, base64.b64decode(unicode(message)) )
  34
  35         return decoded_message
  36
  37     def __init__(self, gui):
  38         self.target_host = 'labelectrum.herokuapp.com'
  39         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, \
  40 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\
  41 To get started visit http://labelectrum.herokuapp.com/ to sign up for an account.'))
  42
  43         self.wallet = gui.wallet
  44         self.gui = gui
  45         self.config = gui.config
  46         self.labels = self.wallet.labels
  47         self.transactions = self.wallet.transactions
  48         self.encode_password = hashlib.sha1(self.config.get("master_public_key")).digest().encode('hex')[:32]
  49
  50         self.wallet_id = hashlib.sha256(str(self.config.get("master_public_key"))).digest().encode('hex')
  51
  52         addresses = []
  53         for k, account in self.wallet.accounts.items():
  54             for address in account[0]:
  55                 addresses.append(address)
  56
  57         self.addresses = addresses
  58
  59     def auth_token(self):
  60         return self.config.get("plugin_label_api_key")
  61
  62     def init_gui(self):
  63         if self.is_enabled() and self.auth_token():
  64             # If there is an auth token we can try to actually start syncing
  65             self.full_pull()
  66
  67     def is_available(self):
  68         return True
  69
  70     def requires_settings(self):
  71         return True
  72
  73     def set_label(self, item,label, changed):
  74         if not changed:
  75             return
  76
  77         bundle = {"label": {"external_id": self.encode(item), "text": self.encode(label)}}
  78         params = json.dumps(bundle)
  79         connection = httplib.HTTPConnection(self.target_host)
  80         connection.request("POST", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
  81
  82         response = connection.getresponse()
  83         if response.reason == httplib.responses[httplib.NOT_FOUND]:
  84             return
  85         response = json.loads(response.read())
  86
  87     def settings_dialog(self):
  88         def check_for_api_key(api_key):
  89             if api_key and len(api_key) > 12:
  90               self.config.set_key("plugin_label_api_key", str(self.auth_token_edit.text()))
  91               self.upload.setEnabled(True)
  92               self.download.setEnabled(True)
  93               self.accept.setEnabled(True)
  94             else:
  95               self.upload.setEnabled(False)
  96               self.download.setEnabled(False)
  97               self.accept.setEnabled(False)
  98
  99         d = QDialog(self.gui)
 100         layout = QGridLayout(d)
 101         layout.addWidget(QLabel("API Key: "),0,0)
 102
 103         self.auth_token_edit = QLineEdit(self.auth_token())
 104         self.auth_token_edit.textChanged.connect(check_for_api_key)
 105
 106         layout.addWidget(QLabel("Label sync options: "),2,0)
 107         layout.addWidget(self.auth_token_edit, 0,1,1,2)
 108
 109         decrypt_key_text =  QLineEdit(self.encode_password)
 110         decrypt_key_text.setReadOnly(True)
 111         layout.addWidget(decrypt_key_text, 1,1)
 112         layout.addWidget(QLabel("Decryption key: "),1,0)
 113         layout.addWidget(HelpButton("This key can be used on the LabElectrum website to decrypt your data in case you want to review it online."),1,2)
 114
 115         self.upload = QPushButton("Force upload")
 116         self.upload.clicked.connect(self.full_push)
 117         layout.addWidget(self.upload, 2,1)
 118
 119         self.download = QPushButton("Force download")
 120         self.download.clicked.connect(lambda: self.full_pull(True))
 121         layout.addWidget(self.download, 2,2)
 122
 123         c = QPushButton(_("Cancel"))
 124         c.clicked.connect(d.reject)
 125
 126         self.accept = QPushButton(_("Done"))
 127         self.accept.clicked.connect(d.accept)
 128
 129         layout.addWidget(c,3,1)
 130         layout.addWidget(self.accept,3,2)
 131
 132         check_for_api_key(self.auth_token())
 133
 134         if d.exec_():
 135           return True
 136         else:
 137           return False
 138
 139     def toggle(self):
 140         enabled = not self.is_enabled()
 141         self.set_enabled(enabled)
 142         self.init_gui()
 143
 144         if not self.auth_token() and enabled: # First run, throw plugin settings in your face
 145             if self.settings_dialog():
 146               self.set_enabled(True)
 147               return True
 148             else:
 149               self.set_enabled(False)
 150               return False
 151         return enabled
 152
 153     def full_push(self):
 154         if self.do_full_push():
 155             QMessageBox.information(None, _("Labels uploaded"), _("Your labels have been uploaded."))
 156
 157     def full_pull(self, force = False):
 158         if self.do_full_pull(force) and force:
 159             QMessageBox.information(None, _("Labels synchronized"), _("Your labels have been synchronized."))
 160             self.gui.update_history_tab()
 161             self.gui.update_completions()
 162             self.gui.update_receive_tab()
 163             self.gui.update_contacts_tab()
 164
 165     def do_full_push(self):
 166         bundle = {"labels": {}}
 167         for key, value in self.labels.iteritems():
 168             encoded = self.encode(key)
 169             bundle["labels"][encoded] = self.encode(value)
 170
 171         params = json.dumps(bundle)
 172         connection = httplib.HTTPConnection(self.target_host)
 173         connection.request("POST", ("/api/wallets/%s/labels/batch.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
 174
 175         response = connection.getresponse()
 176         if response.reason == httplib.responses[httplib.NOT_FOUND]:
 177             return
 178         try:
 179             response = json.loads(response.read())
 180         except ValueError as e:
 181             return False
 182
 183         if "error" in response:
 184             QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 185             return False
 186
 187         return True
 188
 189     def do_full_pull(self, force = False):
 190         connection = httplib.HTTPConnection(self.target_host)
 191         connection.request("GET", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())),"", {'Content-Type': 'application/json'})
 192         response = connection.getresponse()
 193         if response.reason == httplib.responses[httplib.NOT_FOUND]:
 194             return
 195         try:
 196             response = json.loads(response.read())
 197         except ValueError as e:
 198             return False
 199
 200         if "error" in response:
 201             QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 202             return False
 203
 204         for label in response:
 205              decoded_key = self.decode(label["external_id"])
 206              decoded_label = self.decode(label["text"])
 207              if force or not self.labels.get(decoded_key):
 208                  self.labels[decoded_key] = decoded_label
 209         return True