webui: Append server-pushed logging messages to the logging box

* Colorize the logging messages of different level with different colors
* Also add a different icon for each message

3 files changed, 62 insertions, 4 deletions

diff --git a/fg21sim/webui/static/css/main.css b/fg21sim/webui/static/css/main.css
index a574990..de40123 100644
--- a/fg21sim/webui/static/css/main.css
+++ b/fg21sim/webui/static/css/main.css
@@ -374,12 +374,40 @@ button,
     font-size: 1.6rem;
     font-weight: bold;
 }
+.panel-control {
+    float: right;
+}
 .panel-body {
     padding: 1.5rem;
 }
 
 
 /**
+ * Logging messages styles
+ */
+p.log {
+    font-size: 1.3rem;
+    margin-bottom: 0;
+}
+p.log span {
+    margin-right: 0.8rem;
+}
+p.log.log-debug {
+    color: inherit;
+}
+p.log.log-info {
+    color: #398439;
+}
+p.log.log-warning {
+    color: #d58512;
+}
+p.log.log-error,
+p.log.log-critical {
+    color: #ac2925;
+}
+
+
+/**
  * Horizontal rules
  */
 hr {
diff --git a/fg21sim/webui/static/js/console.js b/fg21sim/webui/static/js/console.js
index 6d5783a..f9e75dc 100644
--- a/fg21sim/webui/static/js/console.js
+++ b/fg21sim/webui/static/js/console.js
@@ -58,6 +58,30 @@ var updateTaskStatus = function (status) {
 
 
 /**
+ * Append the logging messages to the "#log-messages" panel box
+ *
+ * @param {Object} msg - Server pushed logging message of "action=log"
+ */
+var appendLogMessage = function (msg) {
+  var log_icons = {
+    debug: "<span class='icon fa fa-comment'></span>",
+    info: "<span class='icon fa fa-info-circle'></span>",
+    warning: "<span class='icon fa fa-warning'></span>",
+    error: "<span class='icon fa fa-times-circle'></span>",
+    critical: "<span class='icon fa fa-times-circle'></span>",
+  };
+  var level = msg.levelname.toLowerCase();
+  var ele = $("<p>").addClass("code log log-" + level);
+  ele.append($(log_icons[level]));
+  ele.append($("<span>").addClass("asctime").text(msg.asctime));
+  ele.append($("<span>").addClass("levelname").text(msg.levelname));
+  ele.append($("<span>").addClass("name").text(msg.name));
+  ele.append($("<span>").addClass("message").text(msg.message));
+  ele.appendTo("#log-messages");
+};
+
+
+/**
  * Get the task status from the server
  *
  * @param {Object} ws - The opened WebSocket object through which to send
@@ -84,7 +108,7 @@ var startServerTask = function (ws, time) {
  */
 var handleMsgConsole = function (msg) {
   if (msg.action === "log") {
-    // TODO: show the logging messages
+    appendLogMessage(msg);
   }
   else if (msg.action === "push") {
     // Update the task status
diff --git a/fg21sim/webui/templates/console.html b/fg21sim/webui/templates/console.html
index e7853c9..ca082cc 100644
--- a/fg21sim/webui/templates/console.html
+++ b/fg21sim/webui/templates/console.html
@@ -22,12 +22,18 @@
     <button type="button" class="button button-warning" id="task-stop" disabled="disabled"><span class="fa fa-stop" aria-hidden="true"></span> Stop</button>
   </p>
 
-  <div id="log-messages" class="panel panel-default">
+  <div class="panel panel-default">
     <div class="panel-heading">
       <span class="panel-title"><span class="fa fa-comments" aria-hidden="true"></span> Logging Messages</span>
+      <span class="panel-control">
+        <span id="log-toggle-debug" title="Toggle display of DEBUG messages" class="btn fa fa-comment" aria-hidden="true"></span>
+        <span id="log-toggle-info" title="Toggle display of INFO messages" class="btn fa fa-info-circle" aria-hidden="true"></span>
+        <span id="log-toggle-warning" title="Toggle display of WARNING messages" class="btn fa fa-warning" aria-hidden="true"></span>
+        <span id="log-toggle-error" title="Toggle display of ERROR messages" class="btn fa fa-times-circle" aria-hidden="true"></span>
+        <span id="log-delete" title="Delete all messages" class="btn fa fa-trash" aria-hidden="true"></span>
+      </span>
     </div>
-    <div class="panel-body">
-      <p>messages ...</p>
+    <div id="log-messages" class="panel-body">
     </div>
   </div>
 </section>