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November 28, 2015 09:29
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/** | |
* This sample demonstrates a simple driver built against the Alexa Lighting Api. | |
* For additional details, please refer to the Alexa Lighting API developer documentation | |
* https://developer.amazon.com/public/binaries/content/assets/html/alexa-lighting-api.html | |
*/ | |
var https = require('https'); | |
var REMOTE_CLOUD_BASE_PATH = '/'; | |
var REMOTE_CLOUD_HOSTNAME = 'www.amazon.com'; | |
var https = require('https'); | |
/** | |
* Main entry point. | |
* Incoming events from Alexa Lighting APIs are processed via this method. | |
*/ | |
exports.handler = function(event, context) { | |
log('Input', event); | |
switch (event.header.namespace) { | |
/** | |
* The namespace of "Discovery" indicates a request is being made to the lambda for | |
* discovering all appliances associated with the customer's appliance cloud account. | |
* can use the accessToken that is made available as part of the payload to determine | |
* the customer. | |
*/ | |
case 'Discovery': | |
handleDiscovery(event, context); | |
break; | |
case 'System': | |
handleHealthCheck(event, context); | |
break; | |
/** | |
* The namespace of "Control" indicates a request is being made to us to turn a | |
* given device on, off or brighten. This message comes with the "appliance" | |
* parameter which indicates the appliance that needs to be acted on. | |
*/ | |
case 'Control': | |
handleControl(event, context); | |
break; | |
/** | |
* We received an unexpected message | |
*/ | |
default: | |
log('Err', 'No supported namespace: ' + event.header.namespace); | |
context.fail('Something went wrong'); | |
break; | |
} | |
}; | |
function handleHealthCheck(event, context){ | |
healthcheck = { | |
"header": { | |
"namespace": "System", | |
"name": "HealthCheckResponse", | |
"payloadVersion": "1" | |
}, | |
"payload": { | |
"isHealthy": true, | |
"description": "The system is currently healthy" | |
} | |
} | |
context.succeed(healthcheck); | |
} | |
/** | |
* This method is invoked when we receive a "Discovery" message from Alexa Connected Home Skill. | |
* We are expected to respond back with a list of appliances that we have discovered for a given | |
* customer. | |
*/ | |
function handleDiscovery(accessToken, context) { | |
/** | |
* Crafting the response header | |
*/ | |
var headers = { | |
namespace: 'Discovery', | |
name: 'DiscoverAppliancesResponse', | |
payloadVersion: '1' | |
}; | |
var options={ | |
auth: "username", | |
hostname: "hostname", | |
method: "GET", | |
path: "/api/devices", | |
port: 443, | |
} | |
appliances = [] | |
https.get(options, function(res){ | |
var body = ''; | |
res.on('data', function(chunk){ | |
body += chunk; | |
}); | |
res.on('end', function(){ | |
var response = JSON.parse(body); | |
var length = response.devices.length | |
for(x = 0; x<length; x++) | |
{ | |
console.log(response.devices[x]) | |
var device = { | |
"manufacturerName": "pimatic", | |
"modelName": "pimatic", | |
"version": "1", | |
"isReachable": true, | |
"additionalApplianceDetails": {} | |
} | |
device["applianceId"] = response.devices[x].id | |
device["friendlyName"] = response.devices[x].name | |
device["friendlyDescription"] = response.devices[x].name | |
appliances.push(device) | |
} | |
/** | |
* Craft the final response back to Alexa Connected Home Skill. This will include all the | |
* discoverd appliances. | |
*/ | |
var payloads = { | |
discoveredAppliances: appliances | |
}; | |
var result = { | |
header: headers, | |
payload: payloads | |
}; | |
log('Discovery', result); | |
context.succeed(result); | |
}); | |
}).on('error', function(e){ | |
console.log("Got an error: ", e); | |
}); | |
} | |
/** | |
* Control events are processed here. | |
* This is called when Alexa requests an action (IE turn off appliance). | |
*/ | |
function handleControl(event, context) { | |
/** | |
* Fail the invocation if the header is unexpected. This example only demonstrates | |
* turn on / turn off, hence we are filtering on anything that is not SwitchOnOffRequest. | |
*/ | |
if (event.header.namespace != 'Control' || event.header.name != 'SwitchOnOffRequest') { | |
context.fail(generateControlError('SwitchOnOffRequest', 'UNSUPPORTED_OPERATION', 'Unrecognized operation')); | |
} | |
if (event.header.namespace === 'Control' && event.header.name === 'SwitchOnOffRequest') { | |
/** | |
* Retrieve the appliance id and accessToken from the incoming message. | |
*/ | |
var applianceId = event.payload.appliance.applianceId; | |
var accessToken = event.payload.accessToken.trim(); | |
log('applianceId', applianceId); | |
/** | |
* Make a remote call to execute the action based on accessToken and the applianceId and the switchControlAction | |
* Some other examples of checks: | |
* validate the appliance is actually reachable else return TARGET_OFFLINE error | |
* validate the authentication has not expired else return EXPIRED_ACCESS_TOKEN error | |
* Please see the technical documentation for detailed list of errors | |
*/ | |
var basePath = ''; | |
if (event.payload.switchControlAction === 'TURN_ON') { | |
basePath = '/api/device/' + applianceId + '/turnOn'; | |
} else if (event.payload.switchControlAction === 'TURN_OFF') { | |
basePath = '/api/device/' + applianceId + '/turnOff'; | |
} | |
var options={ | |
auth: "username:passowrd", | |
hostname: "hostname", | |
method: "GET", | |
path: basePath, | |
port: 443, | |
} | |
var serverError = function (e) { | |
log('Error', e.message); | |
/** | |
* Craft an error response back to Alexa Connected Home Skill | |
*/ | |
context.fail(generateControlError('SwitchOnOffRequest', 'DEPENDENT_SERVICE_UNAVAILABLE', 'Unable to connect to server')); | |
}; | |
var callback = function(response) { | |
var str = ''; | |
response.on('data', function(chunk) { | |
str += chunk.toString('utf-8'); | |
}); | |
response.on('end', function() { | |
/** | |
* Test the response from remote endpoint (not shown) and craft a response message | |
* back to Alexa Connected Home Skill | |
*/ | |
log('done with result'); | |
var headers = { | |
namespace: 'Control', | |
name: 'SwitchOnOffResponse', | |
payloadVersion: '1' | |
}; | |
var payloads = { | |
success: true | |
}; | |
var result = { | |
header: headers, | |
payload: payloads | |
}; | |
log('Done with result', result); | |
context.succeed(result); | |
}); | |
response.on('error', serverError); | |
}; | |
/** | |
* Make an HTTPS call to remote endpoint. | |
*/ | |
https.get(options, callback) | |
.on('error', serverError).end(); | |
} | |
} | |
/** | |
* Utility functions. | |
*/ | |
function log(title, msg) { | |
console.log('*************** ' + title + ' *************'); | |
console.log(msg); | |
console.log('*************** ' + title + ' End*************'); | |
} | |
function generateControlError(name, code, description) { | |
var headers = { | |
namespace: 'Control', | |
name: name, | |
payloadVersion: '1' | |
}; | |
var payload = { | |
exception: { | |
code: code, | |
description: description | |
} | |
}; | |
var result = { | |
header: headers, | |
payload: payload | |
}; | |
return result; | |
}console.log("placeholder"); |
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