From 598c917eda342855ade0a0decb00402ecbebd511 Mon Sep 17 00:00:00 2001
From: Fabio Manganiello <blacklight86@gmail.com>
Date: Tue, 8 May 2018 15:51:47 +0200
Subject: [PATCH] Added Switchbot plugin

---
 .../plugins/switch/switchbot/__init__.py      | 145 ++++++++++++++++++
 .../plugins/switch/switchbot/__main__.py      |  75 +++++++++
 2 files changed, 220 insertions(+)
 create mode 100644 platypush/plugins/switch/switchbot/__init__.py
 create mode 100644 platypush/plugins/switch/switchbot/__main__.py

diff --git a/platypush/plugins/switch/switchbot/__init__.py b/platypush/plugins/switch/switchbot/__init__.py
new file mode 100644
index 00000000..34b3a5c9
--- /dev/null
+++ b/platypush/plugins/switch/switchbot/__init__.py
@@ -0,0 +1,145 @@
+import logging
+import struct
+import subprocess
+import time
+
+from bluetooth.ble import DiscoveryService, GATTRequester
+
+from platypush.message.response import Response
+
+from .. import SwitchPlugin
+
+class Scanner(object):
+    service_uuid = '1bc5d5a5-0200b89f-e6114d22-000da2cb'
+
+    def __init__(self, bt_interface=None, timeout_secs=None):
+        self.bt_interface = bt_interface
+        self.timeout_secs = timeout_secs if timeout_secs else 2
+
+
+    @classmethod
+    def _get_uuids(cls, device):
+        uuids = set()
+
+        for id in device['uuids']:
+            if isinstance(id, tuple):
+                uuid = ''
+                for i in range(0, len(id)):
+                    token = struct.pack('<I', id[i])
+                    for byte in token:
+                        uuid += hex(byte)[2:].zfill(2)
+                    uuid += ('-' if i < len(id)-1 else '')
+                uuids.add(uuid)
+            else:
+                uuids.add(hex(id)[2:])
+
+        return uuids
+
+
+    def scan(self):
+        service = DiscoveryService(self.bt_interface) \
+            if self.bt_interface else DiscoveryService()
+
+        devices = service.discover(self.timeout_secs)
+        return sorted([addr for addr, device in devices.items()
+                if self.service_uuid in self._get_uuids(device)])
+
+
+class Driver(object):
+    handle = 0x16
+    commands = {
+        'press' : '\x57\x01\x00',
+        'on'    : '\x57\x01\x01',
+        'off'   : '\x57\x01\x02',
+    }
+
+    def __init__(self, device, bt_interface=None, timeout_secs=None):
+        self.device = device
+        self.bt_interface = bt_interface
+        self.timeout_secs = timeout_secs if timeout_secs else 5
+        self.req = None
+
+
+    def connect(self):
+        if self.bt_interface:
+            self.req = GATTRequester(self.device, False, self.bt_interface)
+        else:
+            self.req = GATTRequester(self.device, False)
+
+        self.req.connect(True, 'random')
+        connect_start_time = time.time()
+        while not self.req.is_connected():
+            if time.time() - connect_start_time >= self.timeout_secs:
+                raise RuntimeError('Connection to {} timed out after {} seconds'
+                                   .format(self.device, self.timeout_secs))
+
+    def run_command(self, command):
+        self.req.write_by_handle(self.handle, self.commands[command])
+        data = self.req.read_by_handle(self.handle)
+        return data
+
+
+class SwitchSwitchbotPlugin(SwitchPlugin):
+    """
+    NOTE: since the interaction with the Switchbot requires root privileges
+    (in order to scan on the bluetooth interface or setting gattlib in random),
+    this plugin just wraps the module into a `sudo` flavor, since running
+    Platypush with root privileges should be considered as a very bad idea.
+    Make sure that your user has sudo privileges for running this bit of code.
+    """
+
+    def __init__(self, bt_interface=None, connect_timeout=None,
+                 scan_timeout=None, *args, **kwargs):
+        self.bt_interface = bt_interface
+        self.connect_timeout = connect_timeout if connect_timeout else 5
+        self.scan_timeout = scan_timeout if scan_timeout else 2
+
+
+    def _run(self, device, command=None):
+        output = None
+        errors = []
+
+        try:
+            output = subprocess.check_output((
+                'sudo python3 -m platypush.plugins.switch.switchbot ' +
+                '--device {} ' +
+                ('--interface {} '.format(self.bt_interface) if self.bt_interface else '') +
+                ('--connect-timeout {} '.format(self.connect_timeout) if self.connect_timeout else '') +
+                ('--{} '.format(command) if command else '')).format(device),
+                stderr=subprocess.STDOUT, shell=True).decode('utf-8')
+        except subprocess.CalledProcessError as e:
+            errors = [e.output.decode('utf-8')]
+
+        return Response(output=output, errors=errors)
+
+
+    def press(self, device):
+        return self._run(device)
+
+    def on(self, device):
+        return self._run(device, 'on')
+
+    def off(self, device):
+        return self._run(device, 'off')
+
+    def scan(self):
+        output = None
+        errors = []
+
+        try:
+            print('sudo python3 -m platypush.plugins.switch.switchbot --scan ' +
+                ('--interface {} '.format(self.bt_interface) if self.bt_interface else '') +
+                ('--scan-timeout {} '.format(self.scan_timeout) if self.scan_timeout else ''))
+
+            output = subprocess.check_output(
+                'sudo python3 -m platypush.plugins.switch.switchbot --scan ' +
+                ('--interface {} '.format(self.bt_interface) if self.bt_interface else '') +
+                ('--scan-timeout {} '.format(self.scan_timeout) if self.scan_timeout else ''),
+                stderr=subprocess.STDOUT, shell=True).decode('utf-8')
+        except subprocess.CalledProcessError as e:
+            errors = [e.output.decode('utf-8')]
+
+        return Response(output=output, errors=errors)
+
+# vim:sw=4:ts=4:et:
+
diff --git a/platypush/plugins/switch/switchbot/__main__.py b/platypush/plugins/switch/switchbot/__main__.py
new file mode 100644
index 00000000..62a3e28b
--- /dev/null
+++ b/platypush/plugins/switch/switchbot/__main__.py
@@ -0,0 +1,75 @@
+import argparse
+import sys
+
+from . import Driver
+from . import Scanner
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--scan', '-s', dest='scan', required=False, default=False, action='store_true',
+                        help="Run Switchbot in scan mode - scan devices to control")
+
+    parser.add_argument('--scan-timeout', dest='scan_timeout', required=False, default=None,
+                        help="Device scan timeout (default: 2 seconds)")
+
+    parser.add_argument('--connect-timeout', dest='connect_timeout', required=False, default=None,
+                        help="Device connection timeout (default: 5 seconds)")
+
+    parser.add_argument('--device', '-d', dest='device', required=False, default=None,
+                        help="Specify the address of a device to control")
+
+    parser.add_argument('--interface', '-i', dest='interface', required=False, default=None,
+                        help="Name of the bluetooth adapter (default: hci0 or whichever is the default)")
+
+    parser.add_argument('--press', '-p', dest='press', required=False, default=None, action='store_true',
+                        help="Send a press command (default)")
+
+    parser.add_argument('--on', dest='on', required=False, default=None, action='store_true',
+                        help="Send a press on command")
+
+    parser.add_argument('--off', dest='off', required=False, default=None, action='store_true',
+                        help="Send a press on command")
+
+    opts, args = parser.parse_known_args(sys.argv[1:])
+
+    if opts.scan:
+        scanner = Scanner(opts.interface, int(opts.scan_timeout))
+        devices = scanner.scan()
+
+        if not devices:
+            print('No Switchbots found')
+            sys.exit(1)
+
+        print('Found {} devices: {}'.format(len(devices), devices))
+        print('Enter the number of the device you want to control:')
+
+        for i in range(0, len(devices)):
+            print('\t{}\t{}'.format(i, devices[i]))
+
+        i = int(input())
+        bt_addr = devices[i]
+    elif opts.device:
+        bt_addr = opts.device
+    else:
+        raise RuntimeError('Please specify at least one mode between --scan and --device')
+
+    driver = Driver(device=bt_addr, bt_interface=opts.interface, timeout_secs=int(opts.connect_timeout))
+    driver.connect()
+    print('Connected!')
+
+    if opts.on:
+        driver.run_command('on')
+    elif opts.off:
+        driver.run_command('off')
+    else:
+        driver.run_command('press')
+
+    print('Command execution successful')
+
+
+if __name__ == '__main__':
+    main()
+
+
+# vim:sw=4:ts=4:et:
+