Allow user to clear memory of an agent

This closes #802.

app/assets/javascripts/pages/agent-show-page.js.coffee

@@ -2,6 +2,7 @@ class @AgentShowPage
   constructor: ->
     $(".agent-show #show-tabs a[href='#logs'], #logs .refresh").on "click", @fetchLogs
     $(".agent-show #logs .clear").on "click", @clearLogs
+    $(".agent-show #memory .clear").on "click", @clearMemory
 
     # Trigger tabs when navigated to.
     if tab = window.location.href.match(/tab=(\w+)\b/i)?[1]
@@ -39,6 +40,20 @@ class @AgentShowPage
         $("#logs .spinner").stop(true, true).fadeOut ->
           $("#logs .refresh, #logs .clear").show()
 
+  clearMemory: (e) ->
+    if confirm("Are you sure you want to clear memory of this Agent?")
+      agentId = $(e.target).closest("[data-agent-id]").data("agent-id")
+      e.preventDefault()
+      $("#memory .spinner").css(display: 'inline-block')
+      $("#memory .clear").hide()
+      $.post "/agents/#{agentId}/memory", { "_method": "DELETE" }
+        .done ->
+          $("#memory .spinner").fadeOut ->
+            $("#memory + .memory").text "{\n}\n"
+        .fail ->
+          $("#memory .spinner").fadeOut ->
+            $("#memory .clear").css(display: 'inline-block')
+
 $ ->
   Utils.registerPage(AgentShowPage, forPathsMatching: /^agents\/\d+/)
 

app/assets/stylesheets/application.css.scss.erb

@@ -61,7 +61,7 @@ img.odin {
   display: none;
 }
 
-img.spinner {
+.spinner {
   display: none;
   vertical-align: bottom;
 }
@@ -172,6 +172,13 @@ span.not-applicable:after {
   font-weight: bold;
 }
 
+// Memory
+
+#memory .action-icon {
+  display: inline-block;
+  cursor: pointer;
+}
+
 // Credentials
 
 #ace-credential-value {
@@ -285,3 +292,28 @@ $service-colors:      #55acee     #8fc857     #444444     #2c4762     #007EE5;
 .label-service {
   @include services;
 }
+
+// Font Awesome Spinner
+
+.fa-spin-custom {
+  @include animation(spin 1000ms infinite linear);
+}
+
+@mixin keyframes($name)
+{
+  @-webkit-keyframes $name {
+    @content;
+  }
+  @keyframes $name {
+    @content;
+  }
+}
+
+@include keyframes(spin) {
+  0% {
+    @include rotate(0deg);
+  }
+  100% {
+    @include rotate(359deg);
+  }
+}

app/controllers/agents_controller.rb

@@ -112,6 +112,16 @@ class AgentsController < ApplicationController
     end
   end
 
+  def destroy_memory
+    @agent = current_user.agents.find(params[:id])
+    @agent.update!(memory: {})
+
+    respond_to do |format|
+      format.html { redirect_back "Memory erased for '#{@agent.name}'" }
+      format.json { head :ok }
+    end
+  end
+
   def show
     @agent = current_user.agents.find(params[:id])
 

app/views/agents/show.html.erb

@@ -162,9 +162,13 @@
               <pre><%= Utils.pretty_jsonify @agent.options || {} %></pre>
             </p>
 
-            <p>
+            <p id="memory" data-agent-id="<%= @agent.id %>">
               <b>Memory:</b>
-              <pre><%= Utils.pretty_jsonify @agent.memory || {} %></pre>
+              <% if @agent.memory.present? %>
+                <i class="fa fa-spinner fa-spin spinner"></i>
+                <i class="fa fa-trash action-icon clear"></i>
+              <% end %>
+              <pre class="memory"><%= Utils.pretty_jsonify @agent.memory || {} %></pre>
             </p>
           </div>
         </div>

config/routes.rb

@@ -6,6 +6,7 @@ Huginn::Application.routes.draw do
       post :handle_details_post
       put :leave_scenario
       delete :remove_events
+      delete :memory, action: :destroy_memory
     end
 
     collection do