Added GMail actions support, solves #49

platypush/message/request/__init__.py

@@ -113,14 +113,19 @@ class Request(Message):
 
                 if context_argname in context:
                     try:
-                        context_value = eval("context['{}']{}".format(
+                        try:
-                            context_argname, path if path else ''))
+                            context_value = eval("context['{}']{}".format(
+                                context_argname, path if path else ''))
+                        except:
+                            context_value = eval(inner_expr)
 
                         if callable(context_value):
                             context_value = context_value()
                         if isinstance(context_value, datetime.date):
                             context_value = context_value.isoformat()
-                    except: context_value = expr
+                    except Exception as e:
+                        logging.exception(e)
+                        context_value = expr
 
                     parsed_value += prefix + (
                         json.dumps(context_value)
@@ -128,7 +133,12 @@ class Request(Message):
                         or isinstance(context_value, dict)
                         else str(context_value))
 
-                else: parsed_value += prefix + expr
+                else:
+                    try:
+                        parsed_value += prefix + eval(inner_expr)
+                    except Exception as e:
+                        logging.exception(e)
+                        parsed_value += prefix + expr
             else:
                 parsed_value += value
                 value = ''
@@ -162,7 +172,8 @@ class Request(Message):
 
         def _thread_func(n_tries):
             if self.action.startswith('procedure.'):
-                response = self._execute_procedure(n_tries=n_tries)
+                context['n_tries'] = n_tries
+                response = self._execute_procedure(**context)
                 self._send_response(response)
                 return response
             else:

platypush/plugins/google/__init__.py

@@ -0,0 +1,36 @@
+import os
+
+from platypush.plugins import Plugin
+from platypush.plugins.google.credentials import get_credentials
+
+
+class GooglePlugin(Plugin):
+    """
+    Executes calls to the Google APIs using the google-api-python-client.
+    In order to use Google services (like GMail, Maps, Calendar etc.) with
+    your account you need to:
+
+        1. Create your Google application, if you don't have one already, on
+        the developers console, https://console.developers.google.com
+
+        2. Click on "Credentials", then "Create credentials" -> "OAuth client ID"
+
+        3 Select "Other", enter whichever description you like, and create
+
+        4. Click on the "Download JSON" icon next to your newly created client ID
+
+        5. Generate a credentials file for the needed scope:
+
+            $ python -m platypush.plugins.google.credentials 'https://www.googleapis.com/auth/gmail.compose' ~/client_secret.json
+    """
+
+    def __init__(self, scopes, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.credentials = {}
+
+        for scope in scopes:
+            self.credentials[scope] = get_credentials(scope)
+
+
+# vim:sw=4:ts=4:et:
+

platypush/plugins/google/credentials.py

@@ -0,0 +1,82 @@
+import argparse
+import httplib2
+import os
+import sys
+
+from oauth2client import client
+from oauth2client import tools
+from oauth2client.file import Storage
+
+
+def get_credentials_filename(scope):
+    from platypush.config import Config
+
+    scope_name = scope.split('/')[-1]
+    credentials_dir = os.path.join(
+        Config.get('workdir'), 'credentials', 'google')
+
+    if not os.path.exists(credentials_dir):
+        os.makedirs(credentials_dir)
+
+    return os.path.join(credentials_dir, scope_name + '.json')
+
+
+def get_credentials(scope):
+    credentials_file = get_credentials_filename(scope)
+    if not os.path.exists(credentials_file):
+        raise RuntimeError('Credentials file {} not found. Generate it through:\n' +
+                           '\tpython -m platypush.google.credentials "{}"' +
+                           '<path to client_secret.json>\n' +
+                           '\t\t[--auth_host_name AUTH_HOST_NAME]\n' +
+                           '\t\t[--noauth_local_webserver]\n' +
+                           '\t\t[--auth_host_port [AUTH_HOST_PORT [AUTH_HOST_PORT ...]]]\n' +
+                           '\t\t[--logging_level {DEBUG,INFO,WARNING,ERROR,CRITICAL}]\n'.
+                           format(credentials_file, scope_name))
+
+    store = Storage(credentials_file)
+    credentials = store.get()
+
+    if not credentials or credentials.invalid:
+        credentials.refresh(httplib2.Http())
+
+    return credentials
+
+
+def generate_credentials(client_secret_path, scope):
+    credentials_file = get_credentials_filename(scope)
+    store = Storage(credentials_file)
+
+    flow = client.flow_from_clientsecrets(client_secret_path, scope)
+    flow.user_agent = 'Platypush'
+    flow.access_type = 'offline'
+    flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
+    credentials = tools.run_flow(flow, store, flags)
+    print('Storing credentials to ' + credentials_file)
+
+
+def main():
+    """
+    Generates a Google API credentials file given client secret JSON and scopes.
+    Usage:
+        python -m platypush.plugins.google.credentials [client_secret.json location] [comma-separated list of scopes]
+    """
+
+    scope = sys.argv.pop(1) if len(sys.argv) > 1 \
+              else input('Comma separated list of OAuth scopes: ')
+
+    client_secret_path = os.path.expanduser(
+        sys.argv.pop(1) if len(sys.argv) > 1
+        else input('Google credentials JSON file location: '))
+
+    # Uncomment to force headless (no browser spawned) authentication
+    # sys.argv.append('--noauth_local_webserver')
+
+    generate_credentials(client_secret_path, scope)
+
+
+if __name__ == '__main__':
+    main()
+
+
+# vim:sw=4:ts=4:et:
+

platypush/plugins/google/mail.py

@@ -0,0 +1,77 @@
+import base64
+import httplib2
+import mimetypes
+
+from apiclient import discovery
+
+from email.mime.audio import MIMEAudio
+from email.mime.base import MIMEBase
+from email.mime.image import MIMEImage
+from email.mime.multipart import MIMEMultipart
+from email.mime.text import MIMEText
+
+from platypush.message.response import Response
+from platypush.plugins.google import GooglePlugin
+
+
+class GoogleMailPlugin(GooglePlugin):
+    scopes = ['https://www.googleapis.com/auth/gmail.modify']
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(scopes=self.scopes, *args, **kwargs)
+
+
+    def compose(self, sender, to, subject, body, file=None):
+        message = MIMEMultipart() if file else MIMEText(body)
+        message['to'] = to
+        message['from'] = sender
+        message['subject'] = subject
+
+        if file:
+            msg = MIMEText(body)
+            message.attach(msg)
+            content_type, encoding = mimetypes.guess_type(file)
+
+            if content_type is None or encoding is not None:
+                content_type = 'application/octet-stream'
+            main_type, sub_type = content_type.split('/', 1)
+
+            with open(file, 'rb') as fp:
+                if main_type == 'text':
+                    msg = mimetypes.MIMEText(fp.read(), _subtype=sub_type)
+                elif main_type == 'image':
+                    msg = MIMEImage(fp.read(), _subtype=sub_type)
+                elif main_type == 'audio':
+                    msg = MIMEAudio(fp.read(), _subtype=sub_type)
+                else:
+                    msg = MIMEBase(main_type, sub_type)
+                    msg.set_payload(fp.read())
+
+            filename = os.path.basename(file)
+            msg.add_header('Content-Disposition', 'attachment', filename=filename)
+            message.attach(msg)
+
+        service = self._get_service()
+        body = { 'raw': base64.urlsafe_b64encode(message.as_bytes()).decode() }
+        message = (service.users().messages().send(
+            userId='me', body=body).execute())
+
+        return Response(output=message)
+
+
+    def get_labels(self):
+        service = self._get_service()
+        results = service.users().labels().list(userId='me').execute()
+        labels = results.get('labels', [])
+        return Response(output=labels)
+
+
+    def _get_service(self):
+        scope = self.scopes[0]
+        credentials = self.credentials[scope]
+        http = credentials.authorize(httplib2.Http())
+        return discovery.build('gmail', 'v1', http=http, cache_discovery=False)
+
+
+# vim:sw=4:ts=4:et:
+

platypush/procedure/__init__.py

@@ -78,7 +78,8 @@ class Procedure(object):
         response = Response()
 
         for request in self.requests:
-            response = request.execute(n_tries, async=self.async, **context)
+            context['async'] = self.async; context['n_tries'] = n_tries
+            response = request.execute(**context)
 
             if not self.async:
                 if isinstance(response.output, dict):
@@ -125,13 +126,13 @@ class LoopProcedure(Procedure):
         self.requests = requests
 
 
-    def execute(self, n_tries=1, async=None, **context):
+    def execute(self, async=None, **context):
         iterable = Request.expand_value_from_context(self.iterable, **context)
         response = Response()
 
         for item in iterable:
             context[self.iterator_name] = item
-            response = super().execute(n_tries, **context)
+            response = super().execute(**context)
 
         return response
 

requirements.txt

@@ -30,6 +30,9 @@ ouimeaux
 google-assistant-sdk[samples]
 google-assistant-library
 
+# Google APIs general layer support
+google-api-python-client
+
 # Last.FM scrobbler plugin support
 pylast
 

setup.py

@@ -73,6 +73,7 @@ setup(
         'Support for OMXPlayer plugin': ['omxplayer'],
         'Support for YouTube in the OMXPlayer plugin': ['youtube-dl'],
         'Support for Google Assistant': ['google-assistant-library'],
+        'Support for the Google APIs': ['google-api-python-client'],
         'Support for most of the HTTP poll backends': ['python-dateutil'],
         'Support for Last.FM scrobbler plugin': ['pylast'],
         # 'Support for Flic buttons': ['git+ssh://git@github.com/50ButtonsEach/fliclib-linux-hci']