How to convert from text to JSON using NodeJS?

Question

I want to convert a text file to JSON, but in a very particular way. My text file looks like this:

Data 1:
datapoint1-1 = 21
datapoint1-2 = 23
Data 2:
datapoint2-1 = 21
datapoint2-2 = 23
datapoint2-3 = 23

I want to create a JSON file that separates this data like this:

{
 {
 "Data": "1",
 "Datapoints": [
   {
    "datapoint1-1": "21",
    "datapoint1-2": "23"
   }
  ]
 },
 {
 "Data": "2",
 "Datapoints": [
  {
   "datapoint2-1": "21",
   "datapoint2-2": "23",
   "datapoint2-3": "23"
  }
 ]
 }
}

My first step has split the data into 2 arrays inside an array. The first array is Data 1 plus its data-points and the second is Data 2 plus its data-points.

Now I am stuck on how I can convert those arrays into the JSON format I want. Does anyone have an idea? or can direct me in the right direction for this?

Thanks,

Answer 1

Here is my solution

const input = `
  Data 1:
  datapoint1-1 = 21
  datapoint1-2 = 23
  Data 2:
  datapoint2-1 = 21
  datapoint2-2 = 23
  datapoint2-3 = 23
`

const array = input.split('\n').reverse()
const response = []
let template = {}
template['Datapoints'] = []
let switcher = false

array.map(arr => {
  // remove empty strings
  if (arr) {
    if (arr.includes('datapoint')) {
      const keyValue = arr.split(' = ')
      template.Datapoints.push({ [`${keyValue[0]}`]: keyValue[1] })
    } else {
      const keyValue = arr.split(' ')
      template.Datapoints.reverse()

      template[keyValue[0]] = keyValue[1].slice(0, -1)
      switcher = true
    }

    if (switcher) {
      response.push(template)
      template = {}
      template['Datapoints'] = []
      switcher = false
    }
  }
})

const finalResponse = response.reverse()

console.log(JSON.stringify(finalResponse, null, 2))

and in console you got

[
  {
    "Datapoints": [
      {
        "datapoint1-1": "21"
      },
      {
        "datapoint1-2": "23"
      }
    ],
    "Data": "1"
  },
  {
    "Datapoints": [
      {
        "datapoint2-1": "21"
      },
      {
        "datapoint2-2": "23"
      },
      {
        "datapoint2-3": "23"
      }
    ],
    "Data": "2"
  }
]

Answer 2

To convert text files in JSON you can use the JACKSON OBJECT MAPPER jar in your code. Create a simple POJO. It will read JSON string from a file and map it to your class. Then you would need to convert the JSON string value to java object. This will help you with the same.