assets/weights_graphs.js

   1 function WeightsDrawer(selector) {
   2   this.selector = selector;
   3   this.current_source = "consensus_weight_fraction";
   4   this.current_period = "1_month";
   5   this.weights_data = {};
   6   this.svg = null;
   7 };
   8 WeightsDrawer.prototype = new WeightsDrawer();
   9
  10 WeightsDrawer.margin = {top: 50, right: 10, bottom: 90, left: 130};
  11 WeightsDrawer.width = 600 - WeightsDrawer.margin.left - WeightsDrawer.margin.right;
  12 WeightsDrawer.height = 400 - WeightsDrawer.margin.top - WeightsDrawer.margin.bottom;
  13
  14 WeightsDrawer.parseTime = d3.timeFormat("%Y-%m-%d %H:%M:%S").parse;
  15 WeightsDrawer.percentFormatter = d3.format("2%");
  16
  17 WeightsDrawer.x = d3.timeDay
  18     .range([0, WeightsDrawer.width]);
  19
  20 WeightsDrawer.y = d3.scaleLinear()
  21     .range([WeightsDrawer.height, 0]);
  22
  23 WeightsDrawer.xAxis = d3.axisBottom(WeightsDrawer.x);
  24
  25 WeightsDrawer.yAxis = d3.axisLeft(WeightsDrawer.y)
  26     .tickFormat(function(d) { return (d == 0) ? "" : WeightsDrawer.percentFormatter(d); });
  27
  28 WeightsDrawer.area = d3.area()
  29     .x(function(d) { return WeightsDrawer.x(d.date); })
  30     .y0(function(d) { return WeightsDrawer.y(d.y0); })
  31     .y1(function(d) { return WeightsDrawer.y(d.y0 + d.y); });
  32
  33 WeightsDrawer.stack = d3.stack()
  34     .value(function(d) { return d.values; });
  35
  36 WeightsDrawer.onionoo_url = "https://onionoo.torproject.org/weights?type=relay&contact=adminsys@nos-oignons.net";
  37
  38 WeightsDrawer.periods = [
  39     { id: "1_month", label: L10n.t_1_month },
  40     { id: "3_months", label: L10n.t_3_months },
  41     { id: "1_year", label: L10n.t_1_year },
  42     { id: "5_years", label: L10n.t_5_years },
  43   ];
  44
  45 WeightsDrawer.current_period = WeightsDrawer.periods[0].id;
  46
  47 WeightsDrawer.sources = [
  48     { id: "consensus_weight_fraction", label: L10n.consensus_weight },
  49     { id: "exit_probability", label: L10n.exit_probability },
  50   ];
  51
  52 WeightsDrawer.current_source = WeightsDrawer.sources[0].id;
  53
  54 WeightsDrawer.extract_values = function(history, interval, minTime, maxTime) {
  55   var values = [];
  56   var first = history ? WeightsDrawer.parseTime(history.first) : maxTime;
  57   var last = history ? WeightsDrawer.parseTime(history.last) : minTime;
  58   var i = 0;
  59   for (var current = minTime; current <= maxTime; current = d3.time.second.offset(current, interval)) {
  60     values.push({ date: current,
  61                   y: (first <= current && current <= last) ? history.factor * history.values[i++] : 0
  62                 });
  63   }
  64   return values;
  65 }
  66
  67 WeightsDrawer.color = d3.scaleOrdinal();
  68 WeightsDrawer.color.domain(nos_oignons_relays.map(function(r) {return r.fingerprint}));
  69 WeightsDrawer.color.range(nos_oignons_relays.map(function(r) {return r.color}));
  70
  71 WeightsDrawer.prototype.draw_weights_graph = function(raw_data) {
  72   var drawer = this;
  73
  74   // Purge non running relays
  75   raw_data.relays.forEach(function(r, i) {
  76     if (typeof r.consensus_weight_fraction === 'undefined') {
  77       raw_data.relays.splice(i, 1);
  78     }
  79   });
  80
  81   var form_source = d3.select(drawer.selector).append("form")
  82       .attr("id", "weight-sources")
  83       .attr("action", "#");
  84   WeightsDrawer.sources.forEach(function(s) {
  85     var div = form_source.append("div");
  86     var radio = div.append("input")
  87       .attr("type", "radio")
  88       .attr("name", "source")
  89       .attr("id", "source_" + s.id)
  90       .on("click", function() { drawer.update_source(s.id); });
  91     div.append("label")
  92       .attr("for", "source_" + s.id)
  93       .text(s.label);
  94     if (s.id == WeightsDrawer.sources[0].id) {
  95       radio.attr("checked", true);
  96     }
  97   });
  98
  99   drawer.svg = d3.select(drawer.selector).append("svg")
 100       .attr("width", WeightsDrawer.width + WeightsDrawer.margin.left + WeightsDrawer.margin.right)
 101       .attr("height", WeightsDrawer.height + WeightsDrawer.margin.top + WeightsDrawer.margin.bottom)
 102     .append("g")
 103       .attr("transform", "translate(" + WeightsDrawer.margin.left + "," + WeightsDrawer.margin.top + ")");
 104
 105   var form_period = d3.select(drawer.selector).append("form")
 106       .attr("class", "graph-period")
 107       .attr("action", "#");
 108   WeightsDrawer.periods.forEach(function(p) {
 109     var div = form_period.append("div");
 110     var radio = div.append("input")
 111       .attr("type", "radio")
 112       .attr("name", "period")
 113       .attr("id", "weights_period_" + p.id)
 114       .on("click", function() { drawer.update_period(p.id); });
 115     div.append("label")
 116       .attr("for", "weights_period_" + p.id)
 117       .text(p.label);
 118     if (p.id == WeightsDrawer.periods[0].id) {
 119       radio.attr("checked", true);
 120     }
 121   });
 122
 123   WeightsDrawer.sources.map(function(s) { return s.id; }).forEach(function(source) {
 124     drawer.weights_data[source] = {};
 125     WeightsDrawer.periods.map(function(p) { return p.id; }).forEach(function(period) {
 126       var interval = d3.max(raw_data.relays, function(d) {
 127         return d[source][period] && d[source][period].interval;
 128       });
 129       raw_data.relays.forEach(function(d) {
 130         if ((d[source][period] && d[source][period].interval != interval)) {
 131           throw "PANIC: Different interval for different relays in the same time period.";
 132         }
 133       });
 134       var minTime = d3.min(raw_data.relays, function(d) {
 135         return d[source][period] && WeightsDrawer.parseTime(d[source][period].first);
 136       });
 137       var maxTime = d3.min(raw_data.relays, function(d) {
 138         return d[source][period] && WeightsDrawer.parseTime(d[source][period].last);
 139       });
 140
 141       var maxValue = 0;
 142
 143       var relays = WeightsDrawer.color.domain().map(function(fingerprint) {
 144         var relay_data = raw_data["relays"].filter(function(d) { return d.fingerprint == fingerprint; })[0];
 145
 146         var history = relay_data[source][period];
 147         var values = WeightsDrawer.extract_values(history, interval, minTime, maxTime);
 148         maxValue = maxValue + d3.max(values, function(d) { return d.y; });
 149
 150         return {
 151           fingerprint: fingerprint,
 152           values: values,
 153         };
 154       });
 155       drawer.weights_data[source][period] = {
 156         minTime: minTime,
 157         maxTime: maxTime,
 158         maxValue: maxValue,
 159         relays: relays
 160       };
 161     });
 162   });
 163
 164   WeightsDrawer.y.domain([0, drawer.weights_data[WeightsDrawer.current_source][WeightsDrawer.current_period].maxValue]);
 165
 166   WeightsDrawer.x.domain([drawer.weights_data[WeightsDrawer.current_source][WeightsDrawer.current_period].minTime, drawer.weights_data[WeightsDrawer.current_source][WeightsDrawer.current_period].maxTime]);
 167
 168   var weight_graph = drawer.svg.selectAll(".weight_graph")
 169       .data(WeightsDrawer.stack(drawer.weights_data[WeightsDrawer.current_source][WeightsDrawer.current_period].relays))
 170     .enter().append("path")
 171       .attr("class", "weight_graph area")
 172       .attr("d", function(d) { return WeightsDrawer.area(d.values); })
 173       .style("fill", function(d) { return WeightsDrawer.color(d.fingerprint); });
 174
 175   drawer.svg.append("g")
 176       .attr("class", "x axis")
 177       .attr("transform", "translate(0," + WeightsDrawer.height + ")")
 178       .call(WeightsDrawer.xAxis)
 179         .selectAll("text")
 180         .style("text-anchor", "end")
 181         .attr("transform", "rotate(-90) translate(-10, 0)");
 182
 183   drawer.svg.append("g")
 184       .attr("class", "y axis")
 185       .call(WeightsDrawer.yAxis);
 186
 187   var legend = drawer.svg.selectAll(".legend")
 188       .data(WeightsDrawer.color.domain().slice().reverse())
 189     .enter().append("g")
 190       .attr("class", "legend")
 191       .attr("transform", function(d, i) { return "translate(0," + ((i * 20) - WeightsDrawer.margin.top) + ")"; });
 192
 193   legend.append("rect")
 194       .attr("x", WeightsDrawer.width - 18)
 195       .attr("width", 18)
 196       .attr("height", 18)
 197       .style("fill", WeightsDrawer.color);
 198
 199   legend.append("text")
 200       .attr("x", WeightsDrawer.width - 24)
 201       .attr("y", 9)
 202       .attr("dy", ".35em")
 203       .style("text-anchor", "end")
 204       .text(function(d) {
 205         return nos_oignons_relays.filter(function(r) { return r.fingerprint == d; })[0].name;
 206       });
 207 };
 208
 209 WeightsDrawer.prototype.refresh_graph = function() {
 210   var drawer = this;
 211
 212   WeightsDrawer.x.domain([drawer.weights_data[drawer.current_source][drawer.current_period].minTime, drawer.weights_data[drawer.current_source][drawer.current_period].maxTime]);
 213   WeightsDrawer.y.domain([0, drawer.weights_data[drawer.current_source][drawer.current_period].maxValue]);
 214   var t = drawer.svg.transition().duration(300);
 215   t.select(".x.axis").call(WeightsDrawer.xAxis);
 216   t.select(".y.axis").call(WeightsDrawer.yAxis);
 217   t.selectAll(".weight_graph").style("fill-opacity", 0);
 218   t.each("end", function() {
 219     d3.selectAll(".weight_graph").data(WeightsDrawer.stack(drawer.weights_data[drawer.current_source][drawer.current_period].relays));
 220     d3.selectAll(".weight_graph").attr("d", function(d) { return WeightsDrawer.area(d.values); })
 221     var t2 = drawer.svg.transition().duration(100);
 222     t2.selectAll(".weight_graph").style("fill-opacity", 1);
 223   });
 224   d3.selectAll(".x.axis text")
 225     .style("text-anchor", "end")
 226     .attr("transform", "rotate(-90) translate(-10, 0)");
 227 }
 228
 229 WeightsDrawer.prototype.update_source = function(source) {
 230   this.current_source = source;
 231   this.refresh_graph();
 232 }
 233
 234 WeightsDrawer.prototype.update_period = function(period) {
 235   this.current_period = period;
 236   this.refresh_graph();
 237 }
 238
 239 WeightsDrawer.prototype.draw = function() {
 240   var drawer = this;
 241   d3.json(WeightsDrawer.onionoo_url, function(error, raw_data) {
 242     d3.select(drawer.selector).text("");
 243     drawer.draw_weights_graph(raw_data);
 244   });
 245 };