twilio - Twilio Voice - 允许当前呼叫者收听前一个呼叫者录制的语音邮件

如果没有办法在通话之间保持状态，这是不可能的。最好的方法是拥有某种类型的数据库，您可以存储记录 SID 并在未来的流程中引用它。您可以使用Twilio Sync之类的工具或Airtable来执行此操作，但它确实需要代码。

如果不涉及一些编码，我想不出一种方法来做到这一点。

替代方法是列出记录记录并将最近的记录从列表中拉出，但不理想，因为您不知道最后一次记录发生的时间。

另一种方法是修改与该 Studio Flow 的 Twilio 电话号码关联的 webhook，以将最后一个 Recording SID 传递到您的流中，然后使用该 SID 动态构建要播放的录制 URL，如下面的 JSON 流所示（您可以在创建新的 Studio Flow 时导入）。

不要忘记将recordingStatuscallback 设置为上述Twilio 函数，该函数会更新电话号码webhook 以传入录制SID。您将录制语音邮件小部件的录制状态回调设置为指向您唯一的功能域和功能路径（当前设置为：）https://magnolia-kitty-3234.twil.io/phUpdate。

随时改进以下内容并分享。

Twilio 功能代码

exports.handler = function(context, event, callback) {
    
    let client = context.getTwilioClient();
    
    const telephoneNumAccountSid = "PN..."; \\ set this to your Phone Number SID
    const accountSid = event.AccountSid; 
    const studioFlowSid = "FW..."; \\ set this to your Studio Flow SID
    const webhookUrl = `https://webhooks.twilio.com/v1/Accounts/${accountSid}/Flows/${studioFlowSid}`;
    const recordingSid = event.RecordingSid;

    client
        .incomingPhoneNumbers(telephoneNumAccountSid)
        .update({ voiceUrl: `${webhookUrl}?recording=${recordingSid}`, voiceFallbackUrl: `${webhookUrl}?recording=${recordingSid}` })
        .then (result => {
             console.log(result.voiceUrl);
             callback(null, "success");
         })
         .catch(err => {
             console.log(err);
             callback("error");
         });
};

工作室流 JSON

{
  "description": "A New Flow",
  "states": [
    {
      "name": "Trigger",
      "type": "trigger",
      "transitions": [
        {
          "event": "incomingMessage"
        },
        {
          "next": "set_variables_1",
          "event": "incomingCall"
        },
        {
          "event": "incomingRequest"
        }
      ],
      "properties": {
        "offset": {
          "x": 0,
          "y": 0
        }
      }
    },
    {
      "name": "split_1",
      "type": "split-based-on",
      "transitions": [
        {
          "next": "say_play_2",
          "event": "noMatch"
        },
        {
          "next": "gather_1",
          "event": "match",
          "conditions": [
            {
              "friendly_name": "{{trigger.call.recording}}",
              "arguments": [
                "{{trigger.call.recording}}"
              ],
              "type": "is_not_blank",
              "value": "Is Not Blank"
            }
          ]
        }
      ],
      "properties": {
        "input": "{{trigger.call.recording}}",
        "offset": {
          "x": 110,
          "y": 350
        }
      }
    },
    {
      "name": "say_play_1",
      "type": "say-play",
      "transitions": [
        {
          "event": "audioComplete"
        }
      ],
      "properties": {
        "play": "https://api.twilio.com/2010-04-01/Accounts/{{flow.variables.accountSid}}/Recordings/{{flow.variables.recording}}.mp3",
        "offset": {
          "x": 450,
          "y": 1110
        },
        "loop": 1
      }
    },
    {
      "name": "set_variables_1",
      "type": "set-variables",
      "transitions": [
        {
          "next": "split_1",
          "event": "next"
        }
      ],
      "properties": {
        "variables": [
          {
            "value": "{{trigger.call.recording}}",
            "key": "recording"
          },
          {
            "value": "{{trigger.call.AccountSid}}",
            "key": "accountSid"
          }
        ],
        "offset": {
          "x": 60,
          "y": 170
        }
      }
    },
    {
      "name": "say_play_2",
      "type": "say-play",
      "transitions": [
        {
          "next": "record_voicemail_1",
          "event": "audioComplete"
        }
      ],
      "properties": {
        "voice": "Polly.Joanna-Neural",
        "offset": {
          "x": -120,
          "y": 650
        },
        "loop": 1,
        "say": "Please leave a message at the beep!",
        "language": "en-US"
      }
    },
    {
      "name": "record_voicemail_1",
      "type": "record-voicemail",
      "transitions": [
        {
          "event": "recordingComplete"
        },
        {
          "event": "noAudio"
        },
        {
          "event": "hangup"
        }
      ],
      "properties": {
        "transcribe": false,
        "offset": {
          "x": -120,
          "y": 860
        },
        "trim": "trim-silence",
        "play_beep": "true",
        "recording_status_callback_url": "https://magnolia-kitty-3234.twil.io/phUpdate",
        "timeout": 5,
        "max_length": 3600
      }
    },
    {
      "name": "gather_1",
      "type": "gather-input-on-call",
      "transitions": [
        {
          "next": "split_2",
          "event": "keypress"
        },
        {
          "event": "speech"
        },
        {
          "event": "timeout"
        }
      ],
      "properties": {
        "number_of_digits": 1,
        "speech_timeout": "auto",
        "offset": {
          "x": 300,
          "y": 650
        },
        "loop": 1,
        "finish_on_key": "#",
        "say": "There is a previous recording, press 1 if you want to listen to it or 2 if you want to leave a new voicemail.",
        "stop_gather": true,
        "gather_language": "en",
        "profanity_filter": "true",
        "timeout": 5
      }
    },
    {
      "name": "split_2",
      "type": "split-based-on",
      "transitions": [
        {
          "event": "noMatch"
        },
        {
          "next": "say_play_1",
          "event": "match",
          "conditions": [
            {
              "friendly_name": "If value equal_to 1",
              "arguments": [
                "{{widgets.gather_1.Digits}}"
              ],
              "type": "equal_to",
              "value": "1"
            }
          ]
        },
        {
          "next": "say_play_2",
          "event": "match",
          "conditions": [
            {
              "friendly_name": "If value equal_to 2",
              "arguments": [
                "{{widgets.gather_1.Digits}}"
              ],
              "type": "equal_to",
              "value": "2"
            }
          ]
        }
      ],
      "properties": {
        "input": "{{widgets.gather_1.Digits}}",
        "offset": {
          "x": 280,
          "y": 870
        }
      }
    }
  ],
  "initial_state": "Trigger",
  "flags": {
    "allow_concurrent_calls": true
  }
}

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twilio - Twilio Voice - 允许当前呼叫者收听前一个呼叫者录制的语音邮件

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