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.time.format("%Y-%m-%d %H:%M:%S").parse;
  15 WeightsDrawer.percentFormatter = d3.format(".2%");
  16
  17 WeightsDrawer.x = d3.time.scale()
  18     .range([0, WeightsDrawer.width]);
  19
  20 WeightsDrawer.y = d3.scale.linear()
  21     .range([WeightsDrawer.height, 0]);
  22
  23 WeightsDrawer.xAxis = d3.svg.axis()
  24     .scale(WeightsDrawer.x)
  25     .orient("bottom");
  26
  27 WeightsDrawer.yAxis = d3.svg.axis()
  28     .scale(WeightsDrawer.y)
  29     .orient("left")
  30     .tickFormat(function(d) { return (d == 0) ? "" : WeightsDrawer.percentFormatter(d); });
  31
  32 WeightsDrawer.area = d3.svg.area()
  33     .x(function(d) { return WeightsDrawer.x(d.date); })
  34     .y0(function(d) { return WeightsDrawer.y(d.y0); })
  35     .y1(function(d) { return WeightsDrawer.y(d.y0 + d.y); });
  36
  37 WeightsDrawer.stack = d3.layout.stack()
  38     .values(function(d) { return d.values; });
  39
  40 WeightsDrawer.onionoo_url = "https://onionoo.torproject.org/weights?type=relay&contact=adminsys@nos-oignons.net";
  41
  42 WeightsDrawer.periods = [
  43     { id: "1_month", label: L10n.t_1_month },
  44     { id: "3_months", label: L10n.t_3_months },
  45     { id: "1_year", label: L10n.t_1_year },
  46     { id: "5_years", label: L10n.t_5_years },
  47   ];
  48
  49 WeightsDrawer.current_period = WeightsDrawer.periods[0].id;
  50
  51 WeightsDrawer.sources = [
  52     { id: "consensus_weight_fraction", label: L10n.consensus_weight },
  53     { id: "exit_probability", label: L10n.exit_probability },
  54   ];
  55
  56 WeightsDrawer.current_source = WeightsDrawer.sources[0].id;
  57
  58 WeightsDrawer.extract_values = function(history, interval, minTime, maxTime) {
  59   var values = [];
  60   var first = history ? WeightsDrawer.parseTime(history.first) : maxTime;
  61   var last = history ? WeightsDrawer.parseTime(history.last) : minTime;
  62   var i = 0;
  63   for (var current = minTime; current <= maxTime; current = d3.time.second.offset(current, interval)) {
  64     values.push({ date: current,
  65                   y: (first <= current && current <= last) ? history.factor * history.values[i++] : 0
  66                 });
  67   }
  68   return values;
  69 }
  70
  71 WeightsDrawer.color = d3.scale.ordinal();
  72 WeightsDrawer.color.domain(nos_oignons_relays.map(function(r) {return r.fingerprint}));
  73 WeightsDrawer.color.range(nos_oignons_relays.map(function(r) {return r.color}));
  74
  75 WeightsDrawer.prototype.draw_weights_graph = function(raw_data) {
  76   var drawer = this;
  77
  78   // Purge non running relays
  79   raw_data.relays.forEach(function(r, i) {
  80     if (typeof r.consensus_weight_fraction === 'undefined') {
  81       raw_data.relays.splice(i, 1);
  82     }
  83   });
  84
  85   var form_source = d3.select(drawer.selector).append("form")
  86       .attr("action", "#");
  87   WeightsDrawer.sources.forEach(function(s) {
  88     var div = form_source.append("div");
  89     var radio = div.append("input")
  90       .attr("type", "radio")
  91       .attr("name", "source")
  92       .attr("id", "source_" + s.id)
  93       .on("click", function() { drawer.update_source(s.id); });
  94     div.append("label")
  95       .attr("for", "source_" + s.id)
  96       .text(s.label);
  97     if (s.id == WeightsDrawer.sources[0].id) {
  98       radio.attr("checked", true);
  99     }
 100   });
 101
 102   drawer.svg = d3.select(drawer.selector).append("svg")
 103       .attr("width", WeightsDrawer.width + WeightsDrawer.margin.left + WeightsDrawer.margin.right)
 104       .attr("height", WeightsDrawer.height + WeightsDrawer.margin.top + WeightsDrawer.margin.bottom)
 105     .append("g")
 106       .attr("transform", "translate(" + WeightsDrawer.margin.left + "," + WeightsDrawer.margin.top + ")");
 107
 108   var form_period = d3.select(drawer.selector).append("form")
 109       .attr("action", "#");
 110   WeightsDrawer.periods.forEach(function(p) {
 111     var div = form_period.append("div");
 112     var radio = div.append("input")
 113       .attr("type", "radio")
 114       .attr("name", "period")
 115       .attr("id", "period_" + p.id)
 116       .on("click", function() { drawer.update_period(p.id); });
 117     div.append("label")
 118       .attr("for", "period_" + p.id)
 119       .text(p.label);
 120     if (p.id == WeightsDrawer.periods[0].id) {
 121       radio.attr("checked", true);
 122     }
 123   });
 124
 125   WeightsDrawer.sources.map(function(s) { return s.id; }).forEach(function(source) {
 126     drawer.weights_data[source] = {};
 127     WeightsDrawer.periods.map(function(p) { return p.id; }).forEach(function(period) {
 128       var interval = d3.max(raw_data.relays, function(d) {
 129         return d[source][period] && d[source][period].interval;
 130       });
 131       raw_data.relays.forEach(function(d) {
 132         if ((d[source][period] && d[source][period].interval != interval)) {
 133           throw "PANIC: Different interval for different relays in the same time period.";
 134         }
 135       });
 136       var minTime = d3.min(raw_data.relays, function(d) {
 137         return d[source][period] && WeightsDrawer.parseTime(d[source][period].first);
 138       });
 139       var maxTime = d3.min(raw_data.relays, function(d) {
 140         return d[source][period] && WeightsDrawer.parseTime(d[source][period].last);
 141       });
 142
 143       var maxValue = 0;
 144
 145       var relays = WeightsDrawer.color.domain().map(function(fingerprint) {
 146         var relay_data = raw_data["relays"].filter(function(d) { return d.fingerprint == fingerprint; })[0];
 147
 148         var history = relay_data[source][period];
 149         var values = WeightsDrawer.extract_values(history, interval, minTime, maxTime);
 150         maxValue = maxValue + d3.max(values, function(d) { return d.y; });
 151
 152         return {
 153           fingerprint: fingerprint,
 154           values: values,
 155         };
 156       });
 157       drawer.weights_data[source][period] = {
 158         minTime: minTime,
 159         maxTime: maxTime,
 160         maxValue: maxValue,
 161         relays: relays
 162       };
 163     });
 164   });
 165
 166   WeightsDrawer.y.domain([0, drawer.weights_data[WeightsDrawer.current_source][WeightsDrawer.current_period].maxValue]);
 167
 168   WeightsDrawer.x.domain([drawer.weights_data[WeightsDrawer.current_source][WeightsDrawer.current_period].minTime, drawer.weights_data[WeightsDrawer.current_source][WeightsDrawer.current_period].maxTime]);
 169
 170   var weight_graph = drawer.svg.selectAll(".weight_graph")
 171       .data(WeightsDrawer.stack(drawer.weights_data[WeightsDrawer.current_source][WeightsDrawer.current_period].relays))
 172     .enter().append("path")
 173       .attr("class", "weight_graph area")
 174       .attr("d", function(d) { return WeightsDrawer.area(d.values); })
 175       .style("fill", function(d) { return WeightsDrawer.color(d.fingerprint); });
 176
 177   drawer.svg.append("g")
 178       .attr("class", "x axis")
 179       .attr("transform", "translate(0," + WeightsDrawer.height + ")")
 180       .call(WeightsDrawer.xAxis)
 181         .selectAll("text")
 182         .style("text-anchor", "end")
 183         .attr("transform", "rotate(-90) translate(-10, 0)");
 184
 185   drawer.svg.append("g")
 186       .attr("class", "y axis")
 187       .call(WeightsDrawer.yAxis);
 188
 189   var legend = drawer.svg.selectAll(".legend")
 190       .data(WeightsDrawer.color.domain().slice().reverse())
 191     .enter().append("g")
 192       .attr("class", "legend")
 193       .attr("transform", function(d, i) { return "translate(0," + ((i * 20) - WeightsDrawer.margin.top) + ")"; });
 194
 195   legend.append("rect")
 196       .attr("x", WeightsDrawer.width - 18)
 197       .attr("width", 18)
 198       .attr("height", 18)
 199       .style("fill", WeightsDrawer.color);
 200
 201   legend.append("text")
 202       .attr("x", WeightsDrawer.width - 24)
 203       .attr("y", 9)
 204       .attr("dy", ".35em")
 205       .style("text-anchor", "end")
 206       .text(function(d) {
 207         return nos_oignons_relays.filter(function(r) { return r.fingerprint == d; })[0].name;
 208       });
 209 };
 210
 211 WeightsDrawer.prototype.refresh_graph = function() {
 212   var drawer = this;
 213
 214   WeightsDrawer.x.domain([drawer.weights_data[drawer.current_source][drawer.current_period].minTime, drawer.weights_data[drawer.current_source][drawer.current_period].maxTime]);
 215   WeightsDrawer.y.domain([0, drawer.weights_data[drawer.current_source][drawer.current_period].maxValue]);
 216   var t = drawer.svg.transition().duration(300);
 217   t.select(".x.axis").call(WeightsDrawer.xAxis);
 218   t.select(".y.axis").call(WeightsDrawer.yAxis);
 219   t.selectAll(".weight_graph").style("fill-opacity", 0);
 220   t.each("end", function() {
 221     d3.selectAll(".weight_graph").data(WeightsDrawer.stack(drawer.weights_data[drawer.current_source][drawer.current_period].relays));
 222     d3.selectAll(".weight_graph").attr("d", function(d) { return WeightsDrawer.area(d.values); })
 223     var t2 = drawer.svg.transition().duration(100);
 224     t2.selectAll(".weight_graph").style("fill-opacity", 1);
 225   });
 226   d3.selectAll(".x.axis text")
 227     .style("text-anchor", "end")
 228     .attr("transform", "rotate(-90) translate(-10, 0)");
 229 }
 230
 231 WeightsDrawer.prototype.update_source = function(source) {
 232   this.current_source = source;
 233   this.refresh_graph();
 234 }
 235
 236 WeightsDrawer.prototype.update_period = function(period) {
 237   this.current_period = period;
 238   this.refresh_graph();
 239 }
 240
 241 WeightsDrawer.prototype.draw = function() {
 242   var drawer = this;
 243   d3.json(WeightsDrawer.onionoo_url, function(error, raw_data) {
 244     d3.select(drawer.selector).text("");
 245     drawer.draw_weights_graph(raw_data);
 246   });
 247 };