From 28c36dd085a6343cc00281f4cdb7b7b4e69f409e Mon Sep 17 00:00:00 2001
From: Stephen Bourget <sbourget@goffstown.k12.nh.us>
Date: Sun, 8 Feb 2015 20:17:41 -0500
Subject: [PATCH] MDL-48883 Lesson: Add event for content page viewed

---
 .../classes/event/content_page_viewed.php     | 89 +++++++++++++++++++
 mod/lesson/lang/en/lesson.php                 |  1 +
 mod/lesson/pagetypes/branchtable.php          |  9 ++
 3 files changed, 99 insertions(+)
 create mode 100644 mod/lesson/classes/event/content_page_viewed.php

diff --git a/mod/lesson/classes/event/content_page_viewed.php b/mod/lesson/classes/event/content_page_viewed.php
new file mode 100644
index 00000000000..90875cfa66e
--- /dev/null
+++ b/mod/lesson/classes/event/content_page_viewed.php
@@ -0,0 +1,89 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * The mod_lesson content page viewed event class.
+ *
+ * @package    mod_lesson
+ * @copyright  2015 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later.
+ */
+
+namespace mod_lesson\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * The mod_lesson content page viewed event class.
+ *
+ * @package    mod_lesson
+ * @since      Moodle 2.9
+ * @copyright  2015 Stephen Bourget
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later.
+ */
+class content_page_viewed extends \core\event\base {
+
+    /**
+     * Set basic properties for the event.
+     */
+    protected function init() {
+        $this->data['objecttable'] = 'lesson_pages';
+        $this->data['crud'] = 'r';
+        $this->data['edulevel'] = self::LEVEL_PARTICIPATING;
+    }
+
+    /**
+     * Returns localised general event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventcontentpageviewed', 'mod_lesson');
+    }
+
+    /**
+     * Get URL related to the action.
+     *
+     * @return \moodle_url
+     */
+    public function get_url() {
+        return new \moodle_url('/mod/lesson/view.php', array('id' => $this->contextinstanceid, 'pageid' => $this->objectid));
+    }
+
+    /**
+     * Returns non-localised event description with id's for admin use only.
+     *
+     * @return string
+     */
+    public function get_description() {
+        return "The user with id '$this->userid' has viewed the content page with id '$this->objectid' in " .
+            "the lesson activity with course module id '$this->contextinstanceid'.";
+    }
+
+    /**
+     * Custom validations.
+     *
+     * @throws \coding_exception when validation fails.
+     * @return void
+     */
+    protected function validate_data() {
+        parent::validate_data();
+        // Make sure this class is never used without proper object details.
+        if (!$this->contextlevel === CONTEXT_MODULE) {
+            throw new \coding_exception('Context level must be CONTEXT_MODULE.');
+        }
+    }
+}
diff --git a/mod/lesson/lang/en/lesson.php b/mod/lesson/lang/en/lesson.php
index 500d025cc65..57d05edbfe9 100644
--- a/mod/lesson/lang/en/lesson.php
+++ b/mod/lesson/lang/en/lesson.php
@@ -174,6 +174,7 @@ $string['essayemailsubject'] = 'Your grade for {$a} question';
 $string['essayresponses'] = 'Essay responses';
 $string['essays'] = 'Essays';
 $string['essayscore'] = 'Essay score';
+$string['eventcontentpageviewed'] = 'Content page viewed';
 $string['eventessayassessed'] = 'Essay assessed';
 $string['eventessayattemptviewed'] = 'Essay attempt viewed';
 $string['eventhighscoreadded'] = 'Highscore added';
diff --git a/mod/lesson/pagetypes/branchtable.php b/mod/lesson/pagetypes/branchtable.php
index c382ffafd3d..095495bee0a 100644
--- a/mod/lesson/pagetypes/branchtable.php
+++ b/mod/lesson/pagetypes/branchtable.php
@@ -145,6 +145,15 @@ class lesson_page_type_branchtable extends lesson_page {
             $output .= $renderer->slideshow_end();
         }
 
+        // Trigger an event: content page viewed.
+        $eventparams = array(
+            'context' => context_module::instance($PAGE->cm->id),
+            'objectid' => $this->properties->id
+            );
+
+        $event = \mod_lesson\event\content_page_viewed::create($eventparams);
+        $event->trigger();
+
         return $output;
     }