state-machine

{
  "StartAt": "ReadCSV",
  "States": {
    "ReadCSV": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:XXXXXXXXXXXXXXXX:function:lambda-read-CSV",
      "Next": "ProductOrServiceChoice"
    }, 
    "ProductOrServiceChoice": {
      "Type": "Choice",
      "Choices": [
        {
          "Variable": "$.reviewType",
          "StringEquals": "Product",
          "Next": "ProductSentimentAnalysis"
        },
        {
          "Variable": "$.reviewType",
          "StringEquals": "Service",
          "Next": "ServiceSentimentAnalysis"
        }
      ],
      "Default": "CategorisationFail"
    },
    "CategorisationFail": {
      "Type": "Fail",
      "Cause": "Input CSV could not be categorised into 'Product' or 'Service'."
    },
    "ProductSentimentAnalysis": {
      "Type" : "Task",
      "Resource": "arn:aws:lambda:XXXXXXXXXXXXXXXX:function:lambda-sentiment",
      "Next": "ProductResultChoice"
    },

    "ServiceSentimentAnalysis": {
      "Type" : "Task",
      "Resource": "arn:aws:lambda:XXXXXXXXXXXXXXXX:function:lambda-sentiment",
      "Next": "ServiceResultChoice"
    },
    "ProductResultChoice": {
      "Type": "Choice",
      "Choices": [
        {
      "Or": [
        {
          "Variable": "$.sentiment",
          "StringEquals": "POSITIVE"
        },
        {
          "Variable": "$.sentiment",
          "StringEquals": "NEUTRAL"
        }
        ],
        "Next": "WriteToDB"
        },
        {
          "Variable": "$.sentiment",
          "StringEquals": "NEGATIVE",
          "Next": "PublishToSNS"
        }
      ],
      "Default": "SentimentFail"
    },
    "SentimentFail": {
      "Type": "Fail",
      "Cause": "Sentiment Analysis Failed!"
    },
    "ServiceResultChoice": {
      "Type": "Choice",
      "Choices": [
        {
      "Or": [
        {
          "Variable": "$.sentiment",
          "StringEquals": "POSITIVE"
        },
        {
          "Variable": "$.sentiment",
          "StringEquals": "NEUTRAL"
        }
        ],
        "Next": "WriteToDB"
        },
        {
          "Variable": "$.sentiment",
          "StringEquals": "NEGATIVE",
          "Next": "PublishToSNS"
        }
      ],
      "Default": "SentimentFail"
    },
   "PublishToSNS": 
    {
     "Type": "Task",
     "Resource": "arn:aws:lambda:XXXXXXXXXXXXXXXX:function:lambda-SNS",
      "Next": "WriteToDB"
    },
    "WriteToDB": 
    {
     "Type": "Task",
     "Resource": "arn:aws:lambda:XXXXXXXXXXXXXXXX:function:lambda-write-db",
      "Next": "Success"
    }, 
     "Success": 
    {
      "Type": "Succeed"
    }
  }
}