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Macide Celik 2019-10-28 15:45:47 +03:00 • committed by GitHub
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src/core/operations/CSVToJSON.mjs
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/**
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2018
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import OperationError from "../errors/OperationError.mjs";
import Utils from "../Utils.mjs";
/**
* CSV to JSON operation
*/
class CSVToJSON extends Operation {
/**
* CSVToJSON constructor
*/
constructor() {
super();
this.name = "CSV to JSON";
this.module = "Default";
this.description = "Converts a CSV file to JSON format.";
this.infoURL = "https://wikipedia.org/wiki/Comma-separated_values";
this.inputType = "string";
this.outputType = "JSON";
this.args = [
{
name: "Cell delimiters",
type: "binaryShortString",
value: ","
},
{
name: "Row delimiters",
type: "binaryShortString",
value: "\\r\\n"
},
{
name: "Format",
type: "option",
value: ["Array of dictionaries", "Array of arrays"]
}
];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {JSON}
*/
run(input, args) {
const [cellDelims, rowDelims, format] = args;
let json, header;
try {
json = Utils.parseCSV(input, cellDelims.split(""), rowDelims.split(""));
} catch (err) {
throw new OperationError("Unable to parse CSV: " + err);
}
switch (format) {
case "Array of dictionaries":
header = json[0];
return json.slice(1).map(row => {
const obj = {};
header.forEach((h, i) => {
obj[h] = row[i];
});
return obj;
});
case "Array of arrays":
default:
return json;
}
}
}
export default CSVToJSON;