Add CoinDesk BPI for exchange rate

Add CoinDesk BPI for exchange rate options. Choose between blockchain
and coindesk on the plugin settings page.

gui/qt/lite_window.py

@@ -178,8 +178,10 @@ class MiniWindow(QDialog):
         self.actuator = actuator
         self.config = config
         self.btc_balance = None
+        self.use_exchanges = ["Blockchain", "CoinDesk"]
         self.quote_currencies = ["BRL", "CNY", "EUR", "GBP", "RUB", "USD"]
         self.actuator.set_configured_currency(self.set_quote_currency)
+        self.actuator.set_configured_exchange(self.set_exchange)
 
         # Needed because price discovery is done in a different thread
         # which needs to be sent back to this main one to update the GUI
@@ -370,6 +372,13 @@ class MiniWindow(QDialog):
     def deactivate(self):
         pass
 
+    def set_exchange(self, use_exchange):
+        if use_exchange not in self.use_exchanges:
+            return
+        self.use_exchanges.remove(use_exchange)
+        self.use_exchanges.insert(0, use_exchange)
+        self.refresh_balance()
+
     def set_quote_currency(self, currency):
         """Set and display the fiat currency country."""
         if currency not in self.quote_currencies:
@@ -675,6 +684,11 @@ class MiniActuator:
         self.theme_name = theme_name
         self.g.config.set_key('litegui_theme',theme_name)
         self.load_theme()
+   
+    def set_configured_exchange(self, set_exchange):
+        use_exchange = self.g.config.get('use_exchange')
+        if use_exchange is not None:
+            set_exchange(use_exchange)
     
     def set_configured_currency(self, set_quote_currency):
         """Set the inital fiat currency conversion country (USD/EUR/GBP) in 
@@ -685,6 +699,10 @@ class MiniActuator:
         if currency is not None:
             set_quote_currency(currency)
 
+    def set_config_exchange(self, conversion_exchange):
+        self.g.config.set_key('exchange',conversion_exchange,True)
+        self.g.update_status()
+
     def set_config_currency(self, conversion_currency):
         """Change the wallet fiat currency country."""
         self.g.config.set_key('currency',conversion_currency,True)

plugins/exchange_rate.py

@@ -20,6 +20,11 @@ class Exchanger(threading.Thread):
         self.parent = parent
         self.quote_currencies = None
         self.lock = threading.Lock()
+        self.use_exchange = self.parent.config.get('use_exchange', "CoinDesk")
+        self.parent.exchanges = ["CoinDesk", "Blockchain"]
+        self.parent.currencies = ["EUR","GBP","USD"]
+        self.parent.win.emit(SIGNAL("refresh_exchanges_combo()"))
+        self.parent.win.emit(SIGNAL("refresh_currencies_combo()"))
         self.is_running = False
 
     def exchange(self, btc_amount, quote_currency):
@@ -29,7 +34,21 @@ class Exchanger(threading.Thread):
             quote_currencies = self.quote_currencies.copy()
         if quote_currency not in quote_currencies:
             return None
-        return btc_amount * quote_currencies[quote_currency]
+        if self.use_exchange == "CoinDesk":
+            try:
+                connection = httplib.HTTPSConnection('api.coindesk.com')
+                connection.request("GET", "/v1/bpi/currentprice/" + str(quote_currency) + ".json")
+            except Exception:
+                return
+            resp = connection.getresponse()
+            if resp.reason == httplib.responses[httplib.NOT_FOUND]:
+                return
+            try:
+                resp_rate = json.loads(resp.read())
+            except Exception:
+                return
+            return btc_amount * decimal.Decimal(str(resp_rate["bpi"][str(quote_currency)]["rate_float"]))
+        return btc_amount * decimal.Decimal(quote_currencies[quote_currency])
 
     def stop(self):
         self.is_running = False
@@ -37,12 +56,38 @@ class Exchanger(threading.Thread):
     def run(self):
         self.is_running = True
         while self.is_running:
-            self.update()
-            time.sleep(120)
+            self.use_exchange = self.parent.config.get('use_exchange', "Blockchain")
+            if self.use_exchange == "Blockchain":
+                self.update_bc()
+            elif self.use_exchange == "CoinDesk":
+                self.update_cd()
+            time.sleep(150)
+
+    def update_cd(self):
+        try:
+            connection = httplib.HTTPSConnection('api.coindesk.com')
+            connection.request("GET", "/v1/bpi/supported-currencies.json")
+        except Exception:
+            return
+        response = connection.getresponse()
+        if response.reason == httplib.responses[httplib.NOT_FOUND]:
+            return
+        try:
+            resp_currencies = json.loads(response.read())
+        except Exception:
+            return
+
+        quote_currencies = {}
+        for cur in resp_currencies:
+            quote_currencies[str(cur["currency"])] = 0.0
+        with self.lock:
+            self.quote_currencies = quote_currencies
+        self.parent.set_currencies(quote_currencies)
 
-    def update(self):
+
+    def update_bc(self):
         try:
-            connection = httplib.HTTPConnection('blockchain.info')
+            connection = httplib.HTTPSConnection('blockchain.info')
             connection.request("GET", "/ticker")
         except Exception:
             return
@@ -84,6 +129,7 @@ class Plugin(BasePlugin):
     def __init__(self,a,b):
         BasePlugin.__init__(self,a,b)
         self.currencies = [self.config.get('currency', "EUR")]
+        self.exchanges = [self.config.get('use_exchange', "CoinDesk")]
 
     def init(self):
         self.win = self.gui.main_window
@@ -93,16 +139,18 @@ class Plugin(BasePlugin):
         self.exchanger.start()
         self.gui.exchanger = self.exchanger #
 
-    def set_currencies(self, quote_currencies):
-        self.currencies = sorted(quote_currencies.keys())
+    def set_currencies(self, currency_options):
+        self.currencies = sorted(currency_options)
         self.win.emit(SIGNAL("refresh_currencies()"))
         self.win.emit(SIGNAL("refresh_currencies_combo()"))
 
+
     def set_quote_text(self, btc_balance, r):
         r[0] = self.create_quote_text(Decimal(btc_balance) / 100000000)
 
     def create_quote_text(self, btc_balance):
         quote_currency = self.config.get("currency", "EUR")
+        self.exchanger.use_exchange = self.config.get("use_exchange", "Blockchain")
         quote_balance = self.exchanger.exchange(btc_balance, quote_currency)
         if quote_balance is None:
             quote_text = ""
@@ -126,7 +174,15 @@ class Plugin(BasePlugin):
 
 
     def settings_widget(self, window):
+        return EnterButton(_('Settings'), self.settings_dialog)
+
+    def settings_dialog(self):
+        d = QDialog()
+        layout = QGridLayout(d)
+        layout.addWidget(QLabel("Exchange rate API: "), 0, 0)
+        layout.addWidget(QLabel("Currency: "), 1, 0)
         combo = QComboBox()
+        combo_ex = QComboBox()
 
         def on_change(x):
             cur_request = str(self.currencies[x])
@@ -134,6 +190,12 @@ class Plugin(BasePlugin):
                 self.config.set_key('currency', cur_request, True)
                 self.win.update_status()
 
+        def on_change_ex(x):
+            cur_request = str(self.exchanges[x])
+            if cur_request != self.config.get('use_exchange', "CoinDesk"):
+                self.config.set_key('use_exchange', cur_request, True)
+                self.win.update_status()
+
         def set_currencies(combo):
             try:
                 combo.clear()
@@ -146,10 +208,31 @@ class Plugin(BasePlugin):
                 index = 0
             combo.setCurrentIndex(index)
 
+        def set_exchanges(combo_ex):
+            try:
+                combo_ex.clear()
+            except Exception:
+                return
+            combo_ex.addItems(self.exchanges)
+            try:
+                index = self.exchanges.index(self.config.get('use_exchange', "Blockchain"))
+            except Exception:
+                index = 0
+            combo_ex.setCurrentIndex(index)
+
+        set_exchanges(combo_ex)
         set_currencies(combo)
         combo.currentIndexChanged.connect(on_change)
-        combo.connect(window, SIGNAL('refresh_currencies_combo()'), lambda: set_currencies(combo))
-        return combo
+        combo_ex.currentIndexChanged.connect(on_change_ex)
+        combo.connect(d, SIGNAL('refresh_currencies_combo()'), lambda: set_currencies(combo))
+        combo_ex.connect(d, SIGNAL('refresh_exchanges_combo()'), lambda: set_exchanges(combo_ex))
+        layout.addWidget(combo,1,1)
+        layout.addWidget(combo_ex,0,1)
+        
+        if d.exec_():
+            return True
+        else:
+            return False