Move logging logic from the controller to a component

ui/app/components/allocation-log.js

@@ -0,0 +1,84 @@
+import Ember from 'ember';
+import { logger } from 'nomad-ui/utils/classes/log';
+import { task } from 'ember-concurrency';
+
+const { Component, computed, inject, run } = Ember;
+
+export default Component.extend({
+  token: inject.service(),
+
+  classNames: ['boxed-section'],
+
+  allocation: null,
+  task: null,
+
+  didReceiveAttrs() {
+    if (this.get('allocation') && this.get('task')) {
+      this.send('toggleStream');
+    }
+  },
+
+  mode: 'stdout',
+
+  logUrl: computed('allocation.id', 'allocation.node.httpAddr', function() {
+    const address = this.get('allocation.node.httpAddr');
+    const allocation = this.get('allocation.id');
+
+    return `//${address}/v1/client/fs/logs/${allocation}`;
+  }),
+
+  logParams: computed('task', 'mode', function() {
+    return {
+      task: this.get('task'),
+      type: this.get('mode'),
+    };
+  }),
+
+  logger: logger('logUrl', 'logParams', function() {
+    const token = this.get('token');
+    return token.authorizedRequest.bind(token);
+  }),
+
+  head: task(function*() {
+    yield this.get('logger.gotoHead').perform();
+    run.scheduleOnce('afterRender', () => {
+      this.$('.cli-window').scrollTop(0);
+    });
+  }),
+
+  tail: task(function*() {
+    yield this.get('logger.gotoTail').perform();
+    run.scheduleOnce('afterRender', () => {
+      this.$('.cli-window').scrollTop(this.$('.cli-window')[0].scrollHeight);
+    });
+  }),
+
+  stream: task(function*() {
+    this.get('logger').on('tick', () => {
+      var cliWindow = this.$('.cli-window');
+      run.scheduleOnce('afterRender', () => {
+        cliWindow.scrollTop(cliWindow[0].scrollHeight);
+      });
+    });
+
+    yield this.get('logger').startStreaming();
+    this.get('logger').off('tick');
+  }),
+
+  actions: {
+    setMode(mode) {
+      this.send('stopStreaming');
+      this.set('mode', mode);
+    },
+    stopStreaming() {
+      this.get('logger').stop();
+    },
+    toggleStream() {
+      if (this.get('logger.isStreaming')) {
+        this.send('stopStreaming');
+      } else {
+        this.get('stream').perform();
+      }
+    },
+  },
+});

ui/app/styles/components.scss

@@ -1,6 +1,7 @@
 @import "./components/badge";
 @import "./components/boxed-section";
 @import "./components/breadcrumbs";
+@import "./components/cli-window";
 @import "./components/ember-power-select";
 @import "./components/empty-message";
 @import "./components/error-container";

ui/app/styles/components/cli-window.scss

@@ -0,0 +1,12 @@
+.cli-window {
+  background: transparent;
+  color: $white;
+
+  height: 500px;
+  max-height: 500px;
+  overflow: auto;
+
+  .is-light {
+    color: $text;
+  }
+}

ui/app/styles/core/buttons.scss

@@ -4,6 +4,7 @@ $button-box-shadow-standard: 0 2px 0 0 rgba($grey, 0.2);
   font-weight: $weight-bold;
   box-shadow: $button-box-shadow-standard;
   border: 1px solid transparent;
+  text-decoration: none;
 
   &:active,
   &.is-active,

ui/app/templates/allocations/allocation/task/logs.hbs

@@ -10,16 +10,6 @@
 {{#gutter-menu class="page-body"}}
   {{partial "allocations/allocation/task/subnav"}}
   <section class="section">
-    <button class="button is-primary" {{action "setMode" "stdout"}}>stdout</button>
-    <button class="button is-danger" {{action "setMode" "stderr"}}>stderr</button>
-    <button class="button is-outlined is-primary" onclick={{perform stream}}>Stream</button>
-    <button class="button is-outlined is-primary" onclick={{action "stopStreaming"}}>Stop</button>
-    <button class="button is-outlined is-primary" onclick={{perform head}}>Head</button>
-    <button class="button is-outlined is-primary" onclick={{perform tail}}>Tail</button>
-    <p class="content">Start: {{startOffset}}</p>
-    <p class="content">End: {{endOffset}}</p>
-    <div id="logs" style="max-height:300px; overflow:auto">
-      <pre><code>{{stdout.output}}</code></pre>
-    </div>
+    {{allocation-log allocation=model.allocation task=model.name}}
   </section>
 {{/gutter-menu}}

ui/app/templates/components/allocation-log.hbs

@@ -0,0 +1,14 @@
+<div class="boxed-section-head">
+  <button class="button is-info is-outlined" {{action "setMode" "stdout"}}>stdout</button>
+  <button class="button is-danger is-outlined" {{action "setMode" "stderr"}}>stderr</button>
+  <span class="pull-right">
+    <button class="button is-outlined" onclick={{perform head}}>Head</button>
+    <button class="button is-outlined" onclick={{perform tail}}>Tail</button>
+    <button class="button is-outlined" onclick={{action "toggleStream"}}>
+      {{if logger.isStreaming "Pause" "Play"}}
+    </button>
+  </span>
+</div>
+<div class="boxed-section-body is-dark is-full-bleed">
+  <pre class="cli-window"><code>{{logger.output}}</code></pre>
+</div>

ui/app/utils/classes/log.js

@@ -45,7 +45,7 @@ const Log = EmberObject.extend(Evented, {
         newTail = newTail.substr(newTail.length - 50000);
       }
       this.set('tail', newTail);
-      this.trigger('tick');
+      this.trigger('tick', chunk);
     };
 
     if (window.ReadableStream) {