Add developer keys visualization

Well, almost add it- it is currently commented out as I have a few more
things I'd like to take care of, namely correcting static files
versioning and caching, to ensure this doesn't break things.

This is a force-directed graph drawn using D3 as the package treemap
already does. We color the dots by "group", e.g. "dev", "tu", or
"master", and then outline developer keys in green if they have at least
3 master key signatures, red if they have fewer. Hovering over a circle
will show you who's key you are seeing in the visualization.

Signed-off-by: Dan McGee <dan@archlinux.org>

2 files changed, 139 insertions, 3 deletions

diff --git a/media/archweb.css b/media/archweb.css
index f4bb92f..a354cb9 100644
--- a/media/archweb.css
+++ b/media/archweb.css
@@ -986,3 +986,15 @@ ul.signoff-list {
         font-size: 0.85em;
         line-height: 1em;
     }
+
+#visualize-keys svg {
+    width: 100%;
+}
+
+    #visualize-keys circle {
+        stroke-width: 1.5px;
+    }
+
+    #visualize-keys line {
+        stroke: #888;
+    }
diff --git a/media/visualize.js b/media/visualize.js
index d9196d4..e73171e 100644
--- a/media/visualize.js
+++ b/media/visualize.js
@@ -1,5 +1,5 @@
 function packages_treemap(chart_id, orderings, default_order) {
-    var jq_div = $(chart_id),
+    var jq_div = jQuery(chart_id),
         color = d3.scale.category20();
     var key_func = function(d) { return d.key; };
     var value_package_count = function(d) { return d.count; },
@@ -109,7 +109,7 @@ function packages_treemap(chart_id, orderings, default_order) {
         });
     };
 
-    $.each(orderings, function(k, v) {
+    jQuery.each(orderings, function(k, v) {
         make_group_button(k, v);
     });
 
@@ -120,7 +120,131 @@ function packages_treemap(chart_id, orderings, default_order) {
             .data(treemap.size([jq_div.width(), jq_div.height()]), key_func)
             .call(cell);
     };
-    $(window).resize(function() {
+    jQuery(window).resize(function() {
+        if (resize_timeout) {
+            clearTimeout(resize_timeout);
+        }
+        resize_timeout = setTimeout(real_resize, 200);
+    });
+}
+
+function developer_keys(chart_id, data_url) {
+    var jq_div = jQuery(chart_id),
+        r = 10;
+
+    var force = d3.layout.force()
+        .gravity(0.1)
+        .charge(-200)
+        .linkStrength(0.2)
+        .size([jq_div.width(), jq_div.height()]);
+
+    var svg = d3.select(chart_id)
+        .append("svg");
+
+    d3.json(data_url, function(json) {
+        var fill = d3.scale.category20();
+
+        var index_for_key = function(key) {
+            var i;
+            key = key.slice(-8);
+            for (i = 0; i < json.nodes.length; i++) {
+                var node_key = json.nodes[i].key;
+                if (node_key && node_key.slice(-8) === key) {
+                    return i;
+                }
+            }
+        };
+
+        /* filter edges to only include those that we have two nodes for */
+        var edges = jQuery.grep(json.edges, function(d, i) {
+            d.source = index_for_key(d.signer);
+            d.target = index_for_key(d.signee);
+            return d.source >= 0 && d.target >= 0;
+        });
+
+        jQuery.map(json.nodes, function(d, i) { d.master_sigs = 0; });
+        jQuery.map(edges, function(d, i) {
+            if (json.nodes[d.source].group === "master") {
+                json.nodes[d.target].master_sigs += 1;
+            }
+        });
+        jQuery.map(json.nodes, function(d, i) {
+            if (d.group === "dev" || d.group === "tu") {
+                d.approved = d.master_sigs >= 3;
+            } else {
+                d.approved = null;
+            }
+        });
+
+        var link = svg.selectAll("line")
+            .data(edges)
+            .enter()
+            .append("line");
+
+        var node = svg.selectAll("circle")
+            .data(json.nodes)
+            .enter().append("circle")
+            .attr("r", function(d) {
+                switch (d.group) {
+                case "master":
+                    return r * 1.6 - 0.75;
+                case "cacert":
+                    return r * 1.4 - 0.75;
+                case "dev":
+                case "tu":
+                default:
+                    return r - 0.75;
+                }
+            })
+            .style("fill", function(d) { return fill(d.group); })
+            .style("stroke", function(d) {
+                if (d.approved === null) {
+                    return d3.rgb(fill(d.group)).darker();
+                } else if (d.approved) {
+                    return "green";
+                } else {
+                    return "red";
+                }
+            })
+            .call(force.drag);
+        node.append("title").text(function(d) { return d.name; });
+
+        var distance = function(d, i) {
+            /* place a long line between all master keys and other keys.
+             * however, other connected clusters should be close together. */
+            if (d.source.group === "master" || d.target.group === "master") {
+                return 200;
+            } else {
+                return 50;
+            }
+        };
+
+        var tick = function() {
+            var offset = r * 2,
+                w = jq_div.width(),
+                h = jq_div.height();
+            node.attr("cx", function(d) { return (d.x = Math.max(offset, Math.min(w - offset, d.x))); })
+                .attr("cy", function(d) { return (d.y = Math.max(offset, Math.min(h - offset, d.y))); });
+
+            link.attr("x1", function(d) { return d.source.x; })
+                .attr("y1", function(d) { return d.source.y; })
+                .attr("x2", function(d) { return d.target.x; })
+                .attr("y2", function(d) { return d.target.y; });
+        };
+
+        force.nodes(json.nodes)
+            .links(edges)
+            .linkDistance(distance)
+            .on("tick", tick)
+            .start();
+    });
+
+    var resize_timeout = null;
+    var real_resize = function() {
+        resize_timeout = null;
+        force.size([jq_div.width(), jq_div.height()]);
+    };
+    jQuery(window).resize(function() {
         if (resize_timeout) {
             clearTimeout(resize_timeout);
         }