GitHub Status Page Charts

(function() {

  $(function() {
    var render, renderGraphs;
    render = function(data, canvas) {
      var add_gradient, area, bad_at, dateEnd, dateStart, daySpan, format, gradient, h, line, lines, main_path, max, min, numdays, padb, padl, padr, padt, subs, ticks, timeFormat, transition, units, vis, w, warn_at, x, xAxis, y, yAxis, yax, _ref;
      w = canvas.width();
      h = canvas.height();
      units = canvas.attr('data-unit');
      add_gradient = canvas.attr('data-warn-at') != null;
      if (!data.length) {
        return;
      }
      format = function(d) {
        return d + units;
      };
      timeFormat = function(d) {
        if (d < 60) {
          return "" + d + "m";
        } else {
          return "" + (d / 60) + "h";
        }
      };
      data = data.map(function(d, i) {
        return [new Date(d[0] * 1000), d[1]];
      }).sort(function(a, b) {
        return d3.ascending(a[0], b[0]);
      });
      numdays = data.length;
      _ref = [6, 50, 2, 16], padt = _ref[0], padl = _ref[1], padr = _ref[2], padb = _ref[3];
      max = d3.max(data, function(d) {
        return d[1];
      });
      min = d3.min(data, function(d) {
        return d[1];
      });
      if (units === '%') {
        if (max === min) {
          max = 100;
        }
        if (!(min < 99)) {
          min = 99;
        }
      }
      dateStart = data[0][0];
      dateEnd = data[data.length - 1][0];
      daySpan = Math.round((dateEnd - dateStart) / (1000 * 60 * 60 * 24));
      x = d3.time.scale().domain([dateStart, dateEnd]).range([0, w - padl - padr]);
      y = d3.scale.linear().domain([min, max]).range([h - padb - padt, 0]);
      if (daySpan === 1) {
        ticks = 3;
        subs = 6;
      } else if (daySpan === 7) {
        ticks = 4;
        subs = 1;
      } else {
        ticks = 4;
        subs = 6;
      }
      xAxis = d3.svg.axis().scale(x).tickSize(5).tickSubdivide(subs).ticks(ticks).orient("bottom").tickFormat(function(d) {
        if (daySpan <= 1) {
          return d3.time.format('%H:%M')(d).replace(/\s/, '').replace(/^0/, '');
        } else {
          return d3.time.format('%m/%d')(d).replace(/\s/, '').replace(/^0/, '').replace(/\/0/, '/');
        }
      });
      yAxis = d3.svg.axis().scale(y).orient("left").tickPadding(5).tickSize(w).ticks(2).tickFormat(format);
      vis = d3.select(canvas.get(0)).data(data).append('svg').attr('width', w).attr('height', h + padt + padb).attr('class', 'viz').append('svg:g').attr('transform', "translate(" + padl + "," + padt + ")");
      if (add_gradient) {
        warn_at = parseFloat(canvas.attr('data-warn-at'));
        bad_at = parseFloat(canvas.attr('data-bad-at'));
        transition = warn_at - (warn_at - bad_at) / 2;
        gradient = vis.append("svg:defs").append("svg:linearGradient").attr("id", "gradient").attr("x1", "0%").attr("y1", "0%").attr("x2", "0%").attr("y2", "100%").attr("spreadMethod", "pad");
        gradient.append("svg:stop").attr("offset", 100 * y(warn_at) / h + '%').attr("stop-color", "#396").attr("stop-opacity", 1);
        gradient.append("svg:stop").attr("offset", 100 * y(transition) / h + '%').attr("stop-color", "#F29D50").attr("stop-opacity", 1);
        gradient.append("svg:stop").attr("offset", 100 * y(bad_at) / h + '%').attr("stop-color", "#c00").attr("stop-opacity", 1);
      }
      vis.append("g").attr("class", "x axis").attr('transform', "translate(0, " + (h - padt - padb) + ")").call(xAxis);
      area = d3.svg.area().x(function(d) {
        return x(d[0]);
      }).y0(function(d) {
        return y(d[1]);
      }).y1(function(d) {
        return y(0);
      }).interpolate('basis');
      line = d3.svg.line().x(function(d) {
        return x(d[0]);
      }).y(function(d) {
        return y(d[1]);
      }).interpolate('basis');
      yax = vis.append("g").attr("transform", "translate(" + w + ", 0)").attr("class", "y axis");
      yax.call(yAxis).selectAll('.y.axis g').classed('zero', function(d, i) {
        return d === 0;
      }).classed('add', function(d, i) {
        return d > 0;
      }).classed('del', function(d, i) {
        return d < 0;
      });
      lines = vis.selectAll('path.cumulative').data([data]).enter();
      main_path = lines.append('path').attr('class', 'path').attr('d', line);
      if (add_gradient) {
        if (d3.min(data, function(d) {
          return d[1];
        }) === 100) {
          return main_path.style("stroke", "#396");
        } else {
          return main_path.style("stroke", "url(#gradient)");
        }
      }
    };
    renderGraphs = function() {
      return $('.graph-container').html('').each(function() {
        var $canvas, data;
        $canvas = $(this);
        data = JSON.parse($canvas.attr('data-string') || '[]');
        return render(data, $canvas);
      });
    };
    renderGraphs();
    $('#graph_data').on('pjax:end', function() {
      return renderGraphs();
    });
    $(window).on('orientationchange', function() {
      return renderGraphs();
    });
    return $(window).on('resize', function() {
      return renderGraphs();
    });
  });