google-assistant-request-payload.json

{
  "responseId": "3e969628-cf8e-4d99-9bb3-4788f22a0866",
  "queryResult": {
    "queryText": "when is the next train from Stockholm",
    "action": "get-next-departure",
    "parameters": {
      "transportation-method": "train",
      "location": "Stockholm"
    },
    "allRequiredParamsPresent": true,
    "fulfillmentMessages": [{
      "text": {
        "text": [""]
      }
    }],
    "outputContexts": [{
      "name": "projects/stockholm-public-transport/agent/sessions/15478189104263347049375/contexts/google_assistant_input_type_voice",
      "parameters": {
        "transportation-method": "train",
        "location.original": "Stockholm",
        "location": "Stockholm",
        "transportation-method.original": "train"
      }
    }, {
      "name": "projects/stockholm-public-transport/agent/sessions/15478189104263347049375/contexts/actions_capability_audio_output",
      "parameters": {
        "transportation-method": "train",
        "location.original": "Stockholm",
        "location": "Stockholm",
        "transportation-method.original": "train"
      }
    }, {
      "name": "projects/stockholm-public-transport/agent/sessions/15478189104263347049375/contexts/actions_capability_media_response_audio",
      "parameters": {
        "transportation-method": "train",
        "location.original": "Stockholm",
        "location": "Stockholm",
        "transportation-method.original": "train"
      }
    }],
    "intent": {
      "name": "projects/stockholm-public-transport/agent/intents/6c404127-2aef-4b6c-af76-cf93c333642f",
      "displayName": "next-departure"
    },
    "intentDetectionConfidence": 1.0,
    "languageCode": "en-gb"
  },
  "originalDetectIntentRequest": {
    "source": "google",
    "version": "2",
    "payload": {
      "isInSandbox": true,
      "surface": {
        "capabilities": [{
          "name": "actions.capability.AUDIO_OUTPUT"
        }, {
          "name": "actions.capability.MEDIA_RESPONSE_AUDIO"
        }]
      },
      "inputs": [{
        "rawInputs": [{
          "query": "when is the next train from Stockholm",
          "inputType": "VOICE"
        }],
        "arguments": [{
          "rawText": "when is the next train from Stockholm",
          "textValue": "when is the next train from Stockholm",
          "name": "text"
        }],
        "intent": "actions.intent.TEXT"
      }],
      "user": {
        "locale": "en-GB",
        "userId": "15478189225731780762742"
      },
      "conversation": {
        "conversationId": "15478189104263347049375",
        "type": "ACTIVE",
        "conversationToken": "[]"
      }
    }
  },
  "session": "projects/stockholm-public-transport/agent/sessions/15478189104263347049375"
}

google-assitant-response-payload.php

 return [
        'payload' => [
            'google' => [
                'expectUserResponse' => false,
                "richResponse" => [
                    "items" => [
                        [
                            "simpleResponse" => [
                                "textToSpeech" => "$response"
                            ]
                        ]
                    ]
                ]
            ]
        ]
    ];