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 requires_settings(self):
  54         return True
  55
  56     def set_label(self, item,label, changed):
  57         if not changed:
  58             return
  59
  60         hashed = hashlib.sha256(item).digest().encode('hex')
  61         bundle = {"label": {"external_id": hashed, "text": label}}
  62         params = json.dumps(bundle)
  63         connection = httplib.HTTPConnection(self.target_host)
  64         connection.request("POST", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
  65
  66         response = connection.getresponse()
  67         if response.reason == httplib.responses[httplib.NOT_FOUND]:
  68             return
  69         response = json.loads(response.read())
  70
  71     def settings_dialog(self):
  72         def check_for_api_key(api_key):
  73             if api_key and len(api_key) > 12:
  74               self.config.set_key("plugin_label_api_key", str(self.auth_token_edit.text()))
  75               self.upload.setEnabled(True)
  76               self.download.setEnabled(True)
  77               self.accept.setEnabled(True)
  78             else:
  79               self.upload.setEnabled(False)
  80               self.download.setEnabled(False)
  81               self.accept.setEnabled(False)
  82
  83         d = QDialog(self.gui)
  84         layout = QGridLayout(d)
  85         layout.addWidget(QLabel("API Key: "),0,0)
  86
  87         self.auth_token_edit = QLineEdit(self.auth_token())
  88         self.auth_token_edit.textChanged.connect(check_for_api_key)
  89
  90         layout.addWidget(self.auth_token_edit, 0,1,1,2)
  91         layout.addWidget(QLabel("Label sync options: "),1,0)
  92
  93         self.upload = QPushButton("Force upload")
  94         self.upload.clicked.connect(self.full_push)
  95         layout.addWidget(self.upload, 1,1)
  96
  97         self.download = QPushButton("Force download")
  98         self.download.clicked.connect(lambda: self.full_pull(True))
  99         layout.addWidget(self.download, 1,2)
 100
 101         c = QPushButton(_("Cancel"))
 102         c.clicked.connect(d.reject)
 103
 104         self.accept = QPushButton(_("Done"))
 105         self.accept.clicked.connect(d.accept)
 106
 107         layout.addWidget(c,2,1)
 108         layout.addWidget(self.accept,2,2)
 109
 110         check_for_api_key(self.auth_token())
 111
 112         if d.exec_():
 113           return True
 114         else:
 115           return False
 116
 117     def toggle(self):
 118         enabled = not self.is_enabled()
 119         self.set_enabled(enabled)
 120         self.init_gui()
 121
 122         if not self.auth_token() and enabled: # First run, throw plugin settings in your face
 123             if self.settings_dialog():
 124               self.set_enabled(True)
 125               return True
 126             else:
 127               self.set_enabled(False)
 128               return False
 129         return enabled
 130
 131     def full_push(self):
 132         if self.do_full_push():
 133             QMessageBox.information(None, _("Labels uploaded"), _("Your labels have been uploaded."))
 134
 135     def full_pull(self, force = False):
 136         if self.do_full_pull(force) and force:
 137             QMessageBox.information(None, _("Labels synchronized"), _("Your labels have been synchronized."))
 138             self.gui.update_history_tab()
 139             self.gui.update_completions()
 140             self.gui.update_receive_tab()
 141             self.gui.update_contacts_tab()
 142
 143     def do_full_push(self):
 144         bundle = {"labels": {}}
 145         for key, value in self.labels.iteritems():
 146             hashed = hashlib.sha256(key).digest().encode('hex')
 147             bundle["labels"][hashed] = value
 148
 149         params = json.dumps(bundle)
 150         connection = httplib.HTTPConnection(self.target_host)
 151         connection.request("POST", ("/api/wallets/%s/labels/batch.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
 152
 153         response = connection.getresponse()
 154         if response.reason == httplib.responses[httplib.NOT_FOUND]:
 155             return
 156         try:
 157             response = json.loads(response.read())
 158         except ValueError as e:
 159             return False
 160
 161         if "error" in response:
 162             QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 163             return False
 164
 165         return True
 166
 167     def do_full_pull(self, force = False):
 168         connection = httplib.HTTPConnection(self.target_host)
 169         connection.request("GET", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())),"", {'Content-Type': 'application/json'})
 170         response = connection.getresponse()
 171         if response.reason == httplib.responses[httplib.NOT_FOUND]:
 172             return
 173         try:
 174             response = json.loads(response.read())
 175         except ValueError as e:
 176             return False
 177
 178         if "error" in response:
 179             QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 180             return False
 181
 182         for label in response:
 183             for key in self.addresses:
 184                 target_hashed = hashlib.sha256(key).digest().encode('hex')
 185                 if label["external_id"] == target_hashed:
 186                    if force or not self.labels.get(key):
 187                        self.labels[key] = label["text"]
 188             for key, value in self.transactions.iteritems():
 189                 target_hashed = hashlib.sha256(key).digest().encode('hex')
 190                 if label["external_id"] == target_hashed:
 191                    if force or not self.labels.get(key):
 192                        self.labels[key] = label["text"]
 193         return True