<%#= render :partial => 'nav' %>
<table class="table table-bordered">
  <tbody>
    <tr>
      <td class="d3">
      </td>
    </tr>
  </tbody>
</table>

<% content_for :head do %>
<%= javascript_include_tag '/d3.v3.min.js' %>

    <style type="text/css">

path.link {
  fill: none;
  stroke: #666;
  stroke-width: 1.5px;
}

path.link.derived_from {
  stroke: green;
  stroke-dasharray: 0,4 1;
}

path.link.can_write {
  stroke: green;
}

path.link.member_of {
  stroke: blue;
  stroke-dasharray: 0,4 1;
}

path.link.created {
  stroke: red;
}

circle.node {
  fill: #ccc;
  stroke: #333;
  stroke-width: 1.5px;
}

edgetext {
  font: 12px sans-serif;
  pointer-events: none;
    text-align: center;
}

text {
  font: 12px sans-serif;
  pointer-events: none;
}

text.shadow {
  stroke: #fff;
  stroke-width: 3px;
  stroke-opacity: .8;
}

    </style>
<% end %>

<% content_for :js do %>

jQuery(function($){

    var links = <%= raw d3ify_links(@links).to_json %>;

    var nodes = {};

    // Compute the distinct nodes from the links.
    links.forEach(function(link) {
	link.source = nodes[link.source] || (nodes[link.source] = {name: link.source});
	link.target = nodes[link.target] || (nodes[link.target] = {name: link.target});
    });

    var fill_for = {'ldvyl': 'green',
		    'j58dm': 'red',
		    '4zz18': 'blue'};
    jQuery.each(nodes, function(i, node) {
	var m = node.name.match(/-([a-z0-9]{5})-/)
	if (m)
	    node.fill = fill_for[m[1]] || '#ccc';
	else if (node.name.match(/^[0-9a-f]{32}/))
	    node.fill = fill_for['4zz18'];
	else
	    node.fill = '#ccc';
    });

    var w = 960,
    h = 600;

    var force = d3.layout.force()
	.nodes(d3.values(nodes))
	.links(links)
	.size([w, h])
	.linkDistance(150)
	.charge(-300)
	.on("tick", tick)
	.start();

    var svg = d3.select("td.d3").append("svg:svg")
	.attr("width", w)
	.attr("height", h);

    // Per-type markers, as they don't inherit styles.
    svg.append("svg:defs").selectAll("marker")
	.data(["member_of", "owner", "derived_from"])
	.enter().append("svg:marker")
	.attr("id", String)
	.attr("viewBox", "0 -5 10 10")
	.attr("refX", 15)
	.attr("refY", -1.5)
	.attr("markerWidth", 6)
	.attr("markerHeight", 6)
	.attr("orient", "auto")
	.append("svg:path")
	.attr("d", "M0,-5L10,0L0,5");

    var path = svg.append("svg:g").selectAll("path")
	.data(force.links())
	.enter().append("svg:path")
	.attr("class", function(d) { return "link " + d.type; })
	.attr("marker-end", function(d) { return "url(#" + d.type + ")"; });

    var circle = svg.append("svg:g").selectAll("circle")
	.data(force.nodes())
	.enter().append("svg:circle")
	.attr("r", 6)
	.style("fill", function(d) { return d.fill; })
	.call(force.drag);

    var text = svg.append("svg:g").selectAll("g")
	.data(force.nodes())
	.enter().append("svg:g");

    // A copy of the text with a thick white stroke for legibility.
    text.append("svg:text")
	.attr("x", 8)
	.attr("y", ".31em")
	.attr("class", "shadow")
	.text(function(d) { return d.name.replace(/^([0-9a-z]{5}-){2}/,''); });

    text.append("svg:text")
	.attr("x", 8)
	.attr("y", ".31em")
	.text(function(d) { return d.name.replace(/^([0-9a-z]{5}-){2}/,''); });

    var edgetext = svg.append("svg:g").selectAll("g")
	.data(force.links())
	.enter().append("svg:g");

    edgetext
	.append("svg:text")
	.attr("x","-5em")
	.attr("y","-0.2em")
	.text(function(d) { return d.type; });

    // Use elliptical arc path segments to doubly-encode directionality.
    function tick() {
	path.attr("d", function(d) {
	    var dx = d.target.x - d.source.x,
            dy = d.target.y - d.source.y,
            // dr = Math.sqrt(dx * dx + dy * dy);
            dr = 0;
	    return "M" + d.source.x + "," + d.source.y + "A" + dr + "," + dr + " 0 0,1 " + d.target.x + "," + d.target.y;
	});

	circle.attr("transform", function(d) {
	    return "translate(" + d.x + "," + d.y + ")";
	});

	text.attr("transform", function(d) {
	    return "translate(" + d.x + "," + d.y + ")";
	});

	edgetext.attr("transform", function(d) {
	    return "translate(" +
		(d.source.x + d.target.x)/2 + "," +
		(d.source.y + d.target.y)/2 +
		")rotate(" +
		(Math.atan2(d.target.y - d.source.y, d.target.x - d.source.x) * 180 / Math.PI) +
		")";
	});
    }

})(jQuery);
<% end %>