Implement multi-tier info boxes

These use HTML inside of SVG, this allows us to style the SVG's much
easier, it also enables us to reference the dom nodes from within react.

spikes/architecture/d3-revamp/index.html

@@ -7,7 +7,7 @@
   stroke-opacity: 1;
 }
 
-.health {
+.health, .health_warn {
   font-family: LibreFranklin;
   font-size: 12px;
   font-weight: bold;
@@ -16,6 +16,10 @@
   text-align: center;
 }
 
+.health_warn {
+  font-size: 15px;
+}
+
 .stat {
   font-family: LibreFranklin;
   font-size: 12px;
@@ -25,6 +29,29 @@
   line-height: 1.5;
 }
 
+.node_statistics {
+  font-family: LibreFranklin;
+  font-size: 12px;
+  font-weight: normal;
+  font-style: normal;
+  font-stretch: normal;
+  line-height: 1.5;
+}
+
+.node_statistics p {
+  margin: 0 0 0 0;
+  color: rgba(255, 255, 255, 0.8);
+}
+
+.primary, .secondary {
+  font-family: LibreFranklin;
+  font-size: 12px;
+  font-weight: normal;
+  font-style: normal;
+  font-stretch: normal;
+  line-height: 1.5;
+}
+
 </style>
 <svg width='960' height='700'></svg>
 <script src='https://d3js.org/d3.v4.min.js'></script>
@@ -97,23 +124,9 @@ function rect(x, y, width, height, radius) {
 d3.json('services.json', function(error, graph) {
   if (error) throw error;
 
-  // Drawing the links between nodes
+  function createNode(elm) {
-  var link = svg.append('g')
-      .attr('class', 'links')
-    .selectAll('line')
-    .data(graph.links)
-    .enter().append('line')
-      .attr('stroke-width', '2px')
-
-  // And svg group, to contain all of the attributes in @antonas' first prototype
-  var node = svg.selectAll('.node')
-    .data(graph.nodes)
-    .enter()
-    .append('g')
-    .attr('class', 'node_group');
-
     // Box where label will live
-  node.append('path')
+    elm.append('path')
     .attr('class', 'node')
       .attr('d', topRoundedRect('0', '0', 170, 47, 4))
       .attr('stroke', '#343434')
@@ -121,7 +134,7 @@ d3.json('services.json', function(error, graph) {
       .attr('fill', '#464646')
 
     // Hover-over text for a node's label.
-  var text = node.append('g')
+    var text = elm.append('g')
 
     text.append('text')
     .attr('class', 'info_text')
@@ -149,7 +162,7 @@ d3.json('services.json', function(error, graph) {
       .text((d) => d.id == 'Memcached' ? '!' : '❤')
 
     // Box where stats will live
-  var stats = node.append('g');
+    var stats = elm.append('g');
 
     stats.append('path')
     .attr('class', 'node')
@@ -189,14 +202,159 @@ d3.json('services.json', function(error, graph) {
       .text('Network: 1.23kb/sec')
 
 
-  node.call(d3.drag()
+    elm.call(d3.drag()
             .on('start', dragstarted)
             .on('drag', dragged)
             .on('end', dragended));
 
-  node.append('title')
+    elm.append('title')
         .text(function(d) { return d.id; });
 
+  }
+
+  function createExtendedNode(elm) {
+    elm.append('path')
+    .attr('class', 'node')
+      .attr('d', topRoundedRect('0', '0', 170, 47, 4))
+      .attr('stroke', '#343434')
+      .attr('stroke-width', '1px')
+      .attr('fill', '#464646')
+
+    // Hover-over text for a node's label.
+    var text = elm.append('g')
+
+    text.append('text')
+    .attr('class', 'info_text')
+      .attr('x', '12')
+      .attr('y', '30')
+      .attr('text-anchor', 'start')
+      .attr('fill', '#fff')
+      .text(d => d.id)
+
+    // Box where stats will live
+    var stats = elm.append('g');
+    var primary = stats.append('g')
+
+    primary.append('path')
+    .attr('class', 'node')
+      .attr('d', rect('0', '-39', 170, 78, 2))
+      .attr('stroke', '#343434')
+      .attr('stroke-width', '1px')
+      .attr('fill', '#464646')
+
+    primary.append('text')
+    .attr('class', 'primary')
+      .attr('x', '12')
+      .attr('y', '70')
+      .attr('text-anchor', 'start')
+      .attr('fill', '#fff')
+      .text('Primary')
+
+    primary.append('circle')
+    .attr('class', 'alert')
+      .attr('cx', function () { return d3.select(this.parentNode).select('.primary').node().getBBox().width + 30 })
+      .attr('cy', '64')
+      .attr('stroke-width', '0px')
+      .attr('fill', 'rgb(229, 163, 57)')
+      .attr('r', '9px')
+
+    // An icon or label that exists within the circle, inside the infobox
+    primary.append('text')
+    .attr('class', 'health_warn')
+      .attr('x', function () { return d3.select(this.parentNode).select('.primary').node().getBBox().width + 30 })
+      .attr('y', '69')
+      .attr('text-anchor', 'middle')
+      .attr('fill', '#fff')
+      .text('☇')
+
+    var secondary = stats.append('g');
+
+    secondary.append('path')
+    .attr('class', 'node')
+      .attr('d', bottomRoundedRect('0', '-113', 170, 114, 4))
+      .attr('stroke', '#343434')
+      .attr('stroke-width', '1px')
+      .attr('fill', '#464646')
+
+    secondary.append('text')
+    .attr('class', 'secondary')
+      .attr('x', '12')
+      .attr('y', '150')
+      .attr('text-anchor', 'start')
+      .attr('fill', '#fff')
+      .text('Secondary')
+
+    secondary.append('circle')
+    .attr('class', 'alert')
+      .attr('cx', function () { return d3.select(this.parentNode).select('.secondary').node().getBBox().width + 30 })
+      .attr('cy', '144')
+      .attr('stroke-width', '0px')
+      .attr('fill', 'rgb(0,175,102)')
+      .attr('r', '9px')
+
+    // An icon or label that exists within the circle, inside the infobox
+    secondary.append('text')
+    .attr('class', 'health')
+      .attr('x', function () { return d3.select(this.parentNode).select('.secondary').node().getBBox().width + 30 })
+      .attr('y', '149')
+      .attr('text-anchor', 'middle')
+      .attr('fill', '#fff')
+      .text('❤')
+
+    var html = secondary
+      .append('switch')
+      .append('foreignObject')
+        .attr('requiredFeatures', 'http://www.w3.org/TR/SVG11/feature#Extensibility')
+        .attr('x', 12)
+        .attr('y', 160)
+        .attr('width', 160)
+        .attr('height', 100)
+        // From here everything will be rendered with react using a ref.
+        // However for now these values are hard-coded.
+      .append('xhtml:div')
+        .attr('class', 'node_statistics')
+
+        // Remove with react + dyanmic data.
+      html.append('p')
+        .text('CPU: 48%')
+      html.append('p')
+        .text('Memory: 54%')
+      html.append('p')
+        .text('Network: 1.75kb/sec')
+
+    elm.call(d3.drag()
+            .on('start', dragstarted)
+            .on('drag', dragged)
+            .on('end', dragended));
+
+  }
+
+  // Drawing the links between nodes
+  var link = svg.append('g')
+      .attr('class', 'links')
+    .selectAll('line')
+    .data(graph.links)
+    .enter().append('line')
+      .attr('stroke-width', '2px')
+
+  // And svg group, to contain all of the attributes in @antonas' first prototype
+  var node = svg.selectAll('.node')
+    .data(graph.nodes)
+    .enter()
+    .append('g')
+    .attr('class', 'node_group');
+
+  svg.selectAll('.node_group').each(function (d) {
+    // Create different type of node for services with Primaries + Secondaries
+    // We could extend this further to allow us to have as many nested services
+    // as wanted.
+    if (d.id === 'Percona') {
+      createExtendedNode(d3.select(this));
+    } else {
+      createNode(d3.select(this));
+    }
+  });
+
   simulation
       .nodes(graph.nodes)
       .on('tick', ticked);
@@ -209,6 +367,8 @@ d3.json('services.json', function(error, graph) {
   }
 
   function ticked() {
+    // TODO: Remove these values and pull them out of the height of the boxes 
+    // that the constraints belong to.
     r=180
     r2=130