DeleteTask

console.log('Loading function');
var AWS = require('aws-sdk');
AWS.config.region = 'ap-northeast-1';
var dynamodb = new AWS.DynamoDB();

exports.handler = function(event, context) {
    console.log(event);
    if(event.id === null) {
        context.fail("no such id");
        return;
    }

    var params = {
        TableName: 'Tasks',
        Key: {
            "id": {"N": String(event.id)}
        }
    };

    dynamodb.getItem(params, function(err, data){
       if(err || data.Item === null) {
           context.fail("data not found");
           return;
       } 
       console.log(data);
       var done = data.Item.done.BOOL;
       console.log(done);
       if(done) {
           console.log("find one and delete...");
           dynamodb.deleteItem(params, function (err2, data2) {
                err2 && console.log(err2);
                var output = {
                    'id': event.id
                };
                context.succeed(output);
                console.log("delete " + output.id);
            });
       } else {
           context.fail("this Task doesn't complete yet");
       }
    });
};