Step 2: Update the Lambda function (original) (raw)

In this topic, you update your myDateTimeFunction.js file. In the next step, you use the file to deploy the updated function. This triggers CodeDeploy to deploy it by shifting production traffic from the current version of the Lambda function to the updated version.

To update your Lambda function

1. Open myDateTimeFunction.js.
2. Remove the two comment markers ("/*" and "*/") and the explanatory text at the start and end of the case named time in the switch block.
   The uncommented code lets you pass a new parameter, time, to the function. If you pass time to the updated function, it returns the currenthour, minute, and second.
3. Save myDateTimeFunction.js. It should look like the following:

'use strict';  
exports.handler = function(event, context, callback) {  
  if (event.body) {  
    event = JSON.parse(event.body);  
  }  
  var sc; // Status code  
  var result = ""; // Response payload  
  switch(event.option) {  
    case "date":  
      switch(event.period) {  
        case "yesterday":  
          result = setDateResult("yesterday");  
          sc = 200;  
          break;  
        case "today":  
          result = setDateResult();  
          sc = 200;  
          break;  
        case "tomorrow":  
          result = setDateResult("tomorrow");  
          sc = 200;  
          break;  
        default:  
          result = {  
            "error": "Must specify 'yesterday', 'today', or 'tomorrow'."  
          };  
          sc = 400;  
          break;  
      }  
      break;  
      case "time":  
        var d = new Date();  
        var h = d.getHours();  
        var mi = d.getMinutes();  
        var s = d.getSeconds();  
        result = {  
          "hour": h,  
          "minute": mi,  
          "second": s  
        };  
        sc = 200;  
        break;  
      default:  
        result = {  
          "error": "Must specify 'date' or 'time'."  
        };  
        sc = 400;  
      break;  
  }  
  const response = {  
    statusCode: sc,  
    headers: { "Content-type": "application/json" },  
    body: JSON.stringify( result )  
  };  
  callback(null, response);  
  function setDateResult(option) {  
    var d = new Date(); // Today  
    var mo; // Month  
    var da; // Day  
    var y; // Year  
    switch(option) {  
      case "yesterday":  
        d.setDate(d.getDate() - 1);  
        break;  
      case "tomorrow":  
        d.setDate(d.getDate() + 1);  
      default:  
       break;  
    }  
    mo = d.getMonth() + 1; // Months are zero offset (0-11)  
    da = d.getDate();  
    y = d.getFullYear();  
    result = {  
      "month": mo,  
      "day": da,  
      "year": y  
    };  
    return result;  
  }  
};  

(Optional) inspect and test your infrastructure

Step 3: Deploy the updated Lambda function

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