Integration of Webui with Ray (#32)

* Initial integration of webui with ray

* Re-organized calling of build-webui in setup.py

* Fixed Lint comments on js code

* Fixed more lint issues

* Fixed various issues

* Fixed directory in services.py

* Small changes.

* Changes to match lint

webui/task.js

@@ -0,0 +1,68 @@
+var jb = require('jbinary');
+var stream = require('stream');
+
+var task_argument = {
+  'jBinary.littleEndian': true,
+  is_ref: ['enum', 'int8', [true, false]],
+  padding: ['array', 'int8', 7],
+  reference: [
+    'if', 'is_ref',
+    {object_id: ['array', 'uint8', 20], padding: ['array', 'int8', 4]}
+  ],
+  value: [
+    'if_not', 'is_ref',
+    {offset: 'int64', length: 'int64', padding: ['array', 'int8', 8]}
+  ]
+};
+
+var task_spec_header = {
+  'jBinary.littleEndian': true,
+  function_id: ['array', 'uint8', 20],
+  padding: ['array', 'uint8', 4],
+  num_args: ['int64'],
+  arg_index: ['int64'],
+  num_returns: ['int64'],
+  args_value_size: ['int64'],
+  args_value_offset: ['int64'],
+  arguments: ['array', task_argument, 'num_args']
+};
+
+var task_instance = {
+  'jBinary.littleEndian': true,
+  task_iid: ['array', 'uint8', 20],
+  state: 'int32',
+  node_id: ['array', 'uint8', 20],
+  padding: ['array', 'uint8', 4],
+  task_spec_header: ['object', task_spec_header],
+};
+
+
+
+// Convert string or byte buffer of an object ID to hex string.
+function id_to_hex(id) {
+  return new Buffer(id).toString('hex');
+}
+
+module.exports = {
+  parse_task_instance: function(buffer) {
+    var binary = new jb(buffer, task_instance);
+    binary.read('padding');
+    var task_spec = binary.read('task_spec_header');
+    var arguments = [];
+    for (var i = 0; i < task_spec['arguments'].length; i++) {
+      var arg = task_spec['arguments'][i];
+      if (arg['is_ref']) {
+        console.log(arg['reference']['object_id']);
+        arguments.push(id_to_hex(arg['reference']['object_id']));
+      } else {
+        arguments.push("value");
+      }
+    }
+    var state = binary.read('state');
+    var node_id = binary.read('node_id');
+    return {
+      state: state, node_id: id_to_hex(node_id),
+          function_id: id_to_hex(task_spec['function_id']), arguments: arguments
+    }
+  }
+}