Add task transitions history

app/Template/task/sidebar.php

@@ -4,6 +4,9 @@
         <li>
             <?= $this->a(t('Summary'), 'task', 'show', array('task_id' => $task['id'], 'project_id' => $task['project_id'])) ?>
         </li>
+        <li>
+            <?= $this->a(t('Transitions'), 'task', 'transitions', array('task_id' => $task['id'], 'project_id' => $task['project_id'])) ?>
+        </li>
         <?php if ($task['time_estimated'] > 0 || $task['time_spent'] > 0): ?>
         <li>
             <?= $this->a(t('Time tracking'), 'task', 'timesheet', array('task_id' => $task['id'], 'project_id' => $task['project_id'])) ?>

app/Template/task/transitions.php

@@ -0,0 +1,26 @@
+<div class="page-header">
+    <h2><?= t('Transitions') ?></h2>
+</div>
+
+<?php if (empty($transitions)): ?>
+    <p class="alert"><?= t('There is nothing to show.') ?></p>
+<?php else: ?>
+    <table class="table-stripped">
+        <tr>
+            <th><?= t('Date') ?></th>
+            <th><?= t('Source column') ?></th>
+            <th><?= t('Destination column') ?></th>
+            <th><?= t('Executer') ?></th>
+            <th><?= t('Time spent in the column') ?></th>
+        </tr>
+        <?php foreach ($transitions as $transition): ?>
+        <tr>
+            <td><?= dt('%B %e, %Y at %k:%M %p', $transition['date']) ?></td>
+            <td><?= $this->e($transition['src_column']) ?></td>
+            <td><?= $this->e($transition['dst_column']) ?></td>
+            <td><?= $this->a($this->e($transition['name'] ?: $transition['username']), 'user', 'show', array('user_id' => $transition['user_id'])) ?></td>
+            <td><?= n(round($transition['time_spent'] / 3600, 2)).' '.t('hours') ?></td>
+        </tr>
+        <?php endforeach ?>
+    </table>
+<?php endif ?>