function issues_history_stats_plot(url, _b, _s) {

  var svg = d3.select("svg"),

      margin = {top: 20, right: 20, bottom: 30, left: 50},

      width = $('#stats').width() - margin.left - margin.right,

      height = +svg.attr("height") - margin.top - margin.bottom,

      g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

  var parseTime = d3.timeParse("%Y-%m-%d");

  var x = d3.scaleTime()

      .rangeRound([0, width]);

  var y = d3.scaleLinear()

      .rangeRound([height, 0]);

  var area = d3.area()

      .x(function(d) { return x(d.date); })

      .y1(function(d) { return y(d.value); });

  function draw_graph(data) {

    x.domain(d3.extent(data, function(d) { return d.date; }));

    y.domain([0, d3.max(data, function(d) { return d.value; })]);

    area.y0(y(0));

    g.append("path")

        .datum(data)

        .attr("fill", "steelblue")

        .attr("d", area);

    g.append("g")

        .attr("transform", "translate(0," + height + ")")

        .call(d3.axisBottom(x));

    g.append("g")

        .call(d3.axisLeft(y))

      .append("text")

        .attr("fill", "#000")

        .attr("transform", "rotate(-90)")

        .attr("y", 6)

        .attr("dy", "0.71em")

        .attr("text-anchor", "end")

        .text("Open Issues");

  }

  d3.json(url, function(d) {

    var _out = [];

    for (var _d in d.stats) {

      var t = {};

      t.date = parseTime(_d.split('T', 1)[0]);

      t.value = d.stats[_d];

      _out.push(t);

    }

    draw_graph(_out);

    _b.show();

    _s.hide();

  });

}

function show_commits_authors(data) {

  var _b = $("#data_stats");

  var html = '
Authors stats
 Since '

    + new Date(data.results[3]*1000) + ' there has been '

    + data.results[0] + ' commits found in this repo, from '

    + data.results[2] + ' contributors
\n'

    + '
\n';

  for (const key in data.results[1]){

    const cnt = data.results[1][key][0];

    for (let entry in data.results[1][key][1]){

      entry = data.results[1][key][1][entry];

      html += '  

        + view_commits_url.replace('---', entry[1]) + '">'

        + ' '

        + entry[0]

        + '
' + cnt + ' commits
'

        + '\n';

    }

  }

  html += '';

  _b.html(html);

  _b.show();

}

function show_commits_history(data) {

  var _b = $("#data_stats");

  var parseTime = d3.timeParse("%Y-%m-%d");

  var _out = data.results.map(function(x){

    var t = {};

    t.date = parseTime(x[0]);

    t.value = x[1];

    return t;

  });

  var svg = d3.select("svg"),

      margin = {top: 20, right: 20, bottom: 30, left: 50},

      width = $('#stats').width() - margin.left - margin.right,

      height = +svg.attr("height") - margin.top - margin.bottom,

      g = svg.append("g").attr(

        "transform", "translate(" + margin.left + "," + margin.top + ")");

  var x = d3.scaleTime()

      .rangeRound([0, width]);

  var y = d3.scaleLinear()

      .rangeRound([height, 0]);

  var area = d3.area()

      .x(function(d) { return x(d.date); })

      .y1(function(d) { return y(d.value); });

  function draw_graph(data) {

    x.domain(d3.extent(data, function(d) { return d.date; }));

    y.domain([0, d3.max(data, function(d) { return d.value; })]);

    area.y0(y(0));

    g.append("path")

        .datum(data)

        .attr("fill", "steelblue")

        .attr("d", area);

    g.append("g")

        .attr("transform", "translate(0," + height + ")")

        .call(d3.axisBottom(x));

    g.append("g")

        .call(d3.axisLeft(y))

      .append("text")

        .attr("fill", "#000")

        .attr("transform", "rotate(-90)")

        .attr("y", 6)

        .attr("dy", "0.71em")

        .attr("text-anchor", "end")

        .text("Number of commits");

  }

  draw_graph(_out);

  _b.show();

}

function process_async(url, _data, callback) {

  $.post(url, _data)

  .done(function(data) {

    wait_for_task(data.url, callback);

  })

}

function wait_for_task(url, callback) {

  $.get(url)

  .done(function(data){

    callback(data);

    $("#data_stats_spinner").hide();

  })

  .fail(function(){

    window.setTimeout(function() {wait_for_task(url, callback);}, 1000);

  });

}