Format data for high charts representation - node.js

Question

I have data in the below format. I want to plot a line chart to compare data for years 2017 and 2018 for al the months with total.
const listItems = [{
"id": 1,
"total": 21.15,
"dat": "2017-10-21T08:32:36.000Z"
},
{
"id": 2,
"total": 22,
"dat": "2017-11-24T13:46:16.000Z"
},{
"id": 3,
"total": 11,
"dat": "2017-11-24T13:46:16.000Z"
},
{
"id": 4,
"total": 12,
"dat": "2018-04-02T09:15:35.000Z",
}
]
i want to represent Line chart in the below format :
var xAxis = {
categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'
]
};
var series = [{
name: '2017',
data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2,
26.5, 23.3, 18.3, 13.9, 9.6
]
},
{
name: '2018',
data: [-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8,
24.1, 20.1, 14.1, 8.6, 2.5
]
}
];
basically the data represents sum of all the months .

Answer 1

First, write a function that mines month from date, for example:
var dateToMonth = (date) => {
var matched = /[\d]{4}-([\d]{2})-[.]*/g.exec(date)[1];
return matched;
};
also write someone else for mining year. And even an in_array function:
function inArray(needle, haystack) {
var length = haystack.length;
for(var i = 0; i < length; i++) {
if(haystack[i] == needle) return true;
}
return false;
}
Then you have to write a function that iterates your data and sum sum data of same months:
var format = (data) => {
var month_format = [0,0,0,0,0,0,0,0,0,0,0,0];
var last_format = [];
data.map(e => {
var year = dateToYear(e.date);
var years = last_format.map(data_e => data_e.name);
if (!inArray(year, years)) last_format.add({name: year, data: month_format});
var month = dateToMonth(e.date);
last_format.forEach(i => {
if (i.name === year) i[month - a] += e.data;
});
});
return last_format;
};