Enable keyword learning

client/application.js

@@ -70,6 +70,17 @@
         });
     }
 
+    function onLearn() {
+        var query = {
+            keyword: $('#keyword').val(),
+            params:  ctx.searchParams
+        };
+
+        $.getJSON('/node/addKeyword', query, function(results) {
+            console.log(results);
+        });
+    }
+
     function outputResults(results, count) {
         $('#results').empty();
 
@@ -104,6 +115,7 @@
                 }
 
                 $('#search').click(onSearch);
+                $('#learn').click(onLearn);
                 $('#keywords').selectpicker('refresh');
                 $('#keywords').change(function() {
                     $('#search').prop('disabled', $(this).val() === null);

client/index.html

@@ -91,7 +91,7 @@
                         <div class="modal-footer">
                             <div class="btn-group">
                                 <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
-                                <button type="button" class="btn btn-primary">Learn</button>
+                                <button type="button" class="btn btn-primary" id="learn">Learn</button>
                             </div>
                         </div>
                     </div>

server/search.js

@@ -147,6 +147,15 @@ function loadDb(params) {
 }
 
 function addKeyword(query, callback) {
+    if (!query.keyword) {
+        callback({
+            keyword: query.keyword,
+            success: false
+        });
+
+        return;
+    }
+
     getKeywords(function(keywords) {
         var result = {
             food:       0.0,