first commit

lib/classes/analytics/analyser/courses.php

@@ -0,0 +1,139 @@
+<?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/>.
+
+/**
+ * Courses analyser working at course level (insights for the course teachers).
+ *
+ * @package   core
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\analyser;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Courses analyser working at course level (insights for the course teachers).
+ *
+ * @package   core
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class courses extends \core_analytics\local\analyser\by_course {
+
+    /**
+     * Samples origin is course table.
+     *
+     * @return string
+     */
+    public function get_samples_origin() {
+        return 'course';
+    }
+
+    /**
+     * Just one sample per analysable.
+     *
+     * @return bool
+     */
+    public static function one_sample_per_analysable() {
+        return true;
+    }
+
+    /**
+     * Returns the analysable of a sample
+     *
+     * @param int $sampleid
+     * @return \core_analytics\analysable
+     */
+    public function get_sample_analysable($sampleid) {
+        return \core_analytics\course::instance($sampleid);
+    }
+
+    /**
+     * This provides samples' course and context.
+     *
+     * @return string[]
+     */
+    protected function provided_sample_data() {
+        return array('course', 'context');
+    }
+
+    /**
+     * Returns the context of a sample.
+     *
+     * @param int $sampleid
+     * @return \context
+     */
+    public function sample_access_context($sampleid) {
+        return \context_course::instance($sampleid);
+    }
+
+    /**
+     * This will return just one course as we analyse 'by_course'.
+     *
+     * @param \core_analytics\analysable $course
+     * @return array
+     */
+    public function get_all_samples(\core_analytics\analysable $course) {
+
+        $context = \context_course::instance($course->get_id());
+
+        // Just 1 sample per analysable.
+        return array(
+            array($course->get_id() => $course->get_id()),
+            array($course->get_id() => array('course' => $course->get_course_data(), 'context' => $context))
+        );
+    }
+
+    /**
+     * Returns samples data from sample ids.
+     *
+     * @param int[] $sampleids
+     * @return array
+     */
+    public function get_samples($sampleids) {
+        global $DB;
+
+        list($sql, $params) = $DB->get_in_or_equal($sampleids, SQL_PARAMS_NAMED);
+        $courses = $DB->get_records_select('course', "id $sql", $params);
+
+        $courseids = array_keys($courses);
+        $sampleids = array_combine($courseids, $courseids);
+
+        $courses = array_map(function($course) {
+            return array('course' => $course, 'context' => \context_course::instance($course->id));
+        }, $courses);
+
+        // No related data attached.
+        return array($sampleids, $courses);
+    }
+
+    /**
+     * Returns the sample description
+     *
+     * @param int $sampleid
+     * @param int $contextid
+     * @param array $sampledata
+     * @return array array(string, \renderable)
+     */
+    public function sample_description($sampleid, $contextid, $sampledata) {
+        $description = format_string(
+            get_course_display_name_for_list($sampledata['course']), true, array('context' => $sampledata['context']));
+        $courseimage = new \pix_icon('i/course', get_string('course'));
+        return array($description, $courseimage);
+    }
+}

lib/classes/analytics/analyser/site_courses.php

@@ -0,0 +1,139 @@
+<?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/>.
+
+/**
+ * Site courses analyser working at system level (insights for the site admin).
+ *
+ * @package   core
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\analyser;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Site courses analyser working at system level (insights for the site admin).
+ *
+ * @package   core
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class site_courses extends \core_analytics\local\analyser\sitewide {
+
+    /**
+     * Samples origin is course table.
+     *
+     * @return string
+     */
+    public function get_samples_origin() {
+        return 'course';
+    }
+
+    /**
+     * Returns the sample analysable
+     *
+     * @param int $sampleid
+     * @return \core_analytics\analysable
+     */
+    public function get_sample_analysable($sampleid) {
+        return new \core_analytics\site();
+    }
+
+    /**
+     * Data this analyer samples provide.
+     *
+     * @return string[]
+     */
+    protected function provided_sample_data() {
+        return array('course', 'context');
+    }
+
+    /**
+     * Returns the sample context.
+     *
+     * @param int $sampleid
+     * @return \context
+     */
+    public function sample_access_context($sampleid) {
+        return \context_system::instance();
+    }
+
+    /**
+     * Returns all site courses.
+     *
+     * @param \core_analytics\analysable $site
+     * @return array
+     */
+    public function get_all_samples(\core_analytics\analysable $site) {
+        global $DB;
+
+        // Getting courses from DB instead of from the site as these samples
+        // will be stored in memory and we just want the id.
+        $select = 'id != 1';
+        $courses = get_courses('all', 'c.sortorder ASC');
+        unset($courses[SITEID]);
+
+        $courseids = array_keys($courses);
+        $sampleids = array_combine($courseids, $courseids);
+
+        $courses = array_map(function($course) {
+            return array('course' => $course, 'context' => \context_course::instance($course->id));
+        }, $courses);
+
+        // No related data attached.
+        return array($sampleids, $courses);
+    }
+
+    /**
+     * Return all complete samples data from sample ids.
+     *
+     * @param int[] $sampleids
+     * @return array
+     */
+    public function get_samples($sampleids) {
+        global $DB;
+
+        list($sql, $params) = $DB->get_in_or_equal($sampleids, SQL_PARAMS_NAMED);
+        $courses = $DB->get_records_select('course', "id $sql", $params);
+
+        $courseids = array_keys($courses);
+        $sampleids = array_combine($courseids, $courseids);
+
+        $courses = array_map(function($course) {
+            return array('course' => $course, 'context' => \context_course::instance($course->id));
+        }, $courses);
+
+        // No related data attached.
+        return array($sampleids, $courses);
+    }
+
+    /**
+     * Returns the description of a sample.
+     *
+     * @param int $sampleid
+     * @param int $contextid
+     * @param array $sampledata
+     * @return array array(string, \renderable)
+     */
+    public function sample_description($sampleid, $contextid, $sampledata) {
+        $description = format_string(
+            get_course_display_name_for_list($sampledata['course']), true, array('context' => $sampledata['context']));
+        $courseimage = new \pix_icon('i/course', get_string('course'));
+        return array($description, $courseimage);
+    }
+}

lib/classes/analytics/analyser/student_enrolments.php

@@ -0,0 +1,251 @@
+<?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/>.
+
+/**
+ * Student enrolments analyser.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\analyser;
+
+defined('MOODLE_INTERNAL') || die();
+
+require_once($CFG->dirroot . '/lib/enrollib.php');
+
+/**
+ * Student enrolments analyser.
+ *
+ * It does return all student enrolments including the suspended ones.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class student_enrolments extends \core_analytics\local\analyser\by_course {
+
+    /**
+     * @var array Cache for user_enrolment id - course id relation.
+     */
+    protected $samplecourses = array();
+
+    /**
+     * Defines the origin of the samples in the database.
+     *
+     * @return string
+     */
+    public function get_samples_origin() {
+        return 'user_enrolments';
+    }
+
+    /**
+     * Returns the student enrolment course context.
+     *
+     * @param int $sampleid
+     * @return \context
+     */
+    public function sample_access_context($sampleid) {
+        return \context_course::instance($this->get_sample_courseid($sampleid));
+    }
+
+    /**
+     * Returns the student enrolment course.
+     *
+     * @param int $sampleid
+     * @return \core_analytics\analysable
+     */
+    public function get_sample_analysable($sampleid) {
+        $course = enrol_get_course_by_user_enrolment_id($sampleid);
+        return \core_analytics\course::instance($course);
+    }
+
+    /**
+     * Data provided by get_all_samples & get_samples.
+     *
+     * @return string[]
+     */
+    protected function provided_sample_data() {
+        return array('user_enrolments', 'context', 'course', 'user');
+    }
+
+    /**
+     * We need to delete associated data if a user requests his data to be deleted.
+     *
+     * @return bool
+     */
+    public function processes_user_data() {
+        return true;
+    }
+
+    /**
+     * Join the samples origin table with the user id table.
+     *
+     * @param string $sampletablealias
+     * @return string
+     */
+    public function join_sample_user($sampletablealias) {
+        return "JOIN {user_enrolments} ue ON {$sampletablealias}.sampleid = ue.id " .
+               "JOIN {user} u ON u.id = ue.userid";
+    }
+
+    /**
+     * All course student enrolments.
+     *
+     * It does return all student enrolments including the suspended ones.
+     *
+     * @param \core_analytics\analysable $course
+     * @return array
+     */
+    public function get_all_samples(\core_analytics\analysable $course) {
+
+        $enrolments = enrol_get_course_users($course->get_id());
+
+        // We fetch all enrolments, but we are only interested in students.
+        $studentids = $course->get_students();
+
+        $samplesdata = array();
+        foreach ($enrolments as $userenrolmentid => $user) {
+
+            if (empty($studentids[$user->id])) {
+                // Not a student or an analysed one.
+                continue;
+            }
+
+            $sampleid = $userenrolmentid;
+            $samplesdata[$sampleid]['user_enrolments'] = (object)array(
+                'id' => $user->ueid,
+                'status' => $user->uestatus,
+                'enrolid' => $user->ueenrolid,
+                'userid' => $user->id,
+                'timestart' => $user->uetimestart,
+                'timeend' => $user->uetimeend,
+                'modifierid' => $user->uemodifierid,
+                'timecreated' => $user->uetimecreated,
+                'timemodified' => $user->uetimemodified
+            );
+            unset($user->ueid);
+            unset($user->uestatus);
+            unset($user->ueenrolid);
+            unset($user->uetimestart);
+            unset($user->uetimeend);
+            unset($user->uemodifierid);
+            unset($user->uetimecreated);
+            unset($user->uetimemodified);
+
+            // This student has been already analysed. We analyse each student once.
+            unset($studentids[$user->id]);
+
+            $samplesdata[$sampleid]['course'] = $course->get_course_data();
+            $samplesdata[$sampleid]['context'] = $course->get_context();
+            $samplesdata[$sampleid]['user'] = $user;
+
+            // Fill the cache.
+            $this->samplecourses[$sampleid] = $course->get_id();
+        }
+
+        $enrolids = array_keys($samplesdata);
+        return array(array_combine($enrolids, $enrolids), $samplesdata);
+    }
+
+    /**
+     * Returns all samples from the samples ids.
+     *
+     * @param int[] $sampleids
+     * @return array
+     */
+    public function get_samples($sampleids) {
+        global $DB;
+
+        $enrolments = enrol_get_course_users(false, false, array(), $sampleids);
+
+        // Some course enrolments.
+        list($enrolsql, $params) = $DB->get_in_or_equal($sampleids, SQL_PARAMS_NAMED);
+
+        $samplesdata = array();
+        foreach ($enrolments as $userenrolmentid => $user) {
+
+            $sampleid = $userenrolmentid;
+            $samplesdata[$sampleid]['user_enrolments'] = (object)array(
+                'id' => $user->ueid,
+                'status' => $user->uestatus,
+                'enrolid' => $user->ueenrolid,
+                'userid' => $user->id,
+                'timestart' => $user->uetimestart,
+                'timeend' => $user->uetimeend,
+                'modifierid' => $user->uemodifierid,
+                'timecreated' => $user->uetimecreated,
+                'timemodified' => $user->uetimemodified
+            );
+            unset($user->ueid);
+            unset($user->uestatus);
+            unset($user->ueenrolid);
+            unset($user->uetimestart);
+            unset($user->uetimeend);
+            unset($user->uemodifierid);
+            unset($user->uetimecreated);
+            unset($user->uetimemodified);
+
+            // Enrolment samples are grouped by the course they belong to, so all $sampleids belong to the same
+            // course, $courseid and $coursemodinfo will only query the DB once and cache the course data in memory.
+            $courseid = $this->get_sample_courseid($sampleid);
+            $coursemodinfo = get_fast_modinfo($courseid);
+            $coursecontext = \context_course::instance($courseid);
+
+            $samplesdata[$sampleid]['course'] = $coursemodinfo->get_course();
+            $samplesdata[$sampleid]['context'] = $coursecontext;
+            $samplesdata[$sampleid]['user'] = $user;
+
+            // Fill the cache.
+            $this->samplecourses[$sampleid] = $coursemodinfo->get_course()->id;
+        }
+
+        $enrolids = array_keys($samplesdata);
+        return array(array_combine($enrolids, $enrolids), $samplesdata);
+    }
+
+    /**
+     * Returns the student enrolment course id.
+     *
+     * @param int $sampleid
+     * @return int
+     */
+    protected function get_sample_courseid($sampleid) {
+        global $DB;
+
+        if (empty($this->samplecourses[$sampleid])) {
+            $course = enrol_get_course_by_user_enrolment_id($sampleid);
+            $this->samplecourses[$sampleid] = $course->id;
+        }
+
+        return $this->samplecourses[$sampleid];
+    }
+
+    /**
+     * Returns the visible name of a sample + a renderable to display as sample picture.
+     *
+     * @param int $sampleid
+     * @param int $contextid
+     * @param array $sampledata
+     * @return array array(string, \renderable)
+     */
+    public function sample_description($sampleid, $contextid, $sampledata) {
+        $description = fullname($sampledata['user'], true, array('context' => $contextid));
+        return array($description, new \user_picture($sampledata['user']));
+    }
+
+}

lib/classes/analytics/analyser/users.php

@@ -0,0 +1,192 @@
+<?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/>.
+
+/**
+ * Users analyser (insights for users).
+ *
+ * @package   core
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\analyser;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Users analyser (insights for users).
+ *
+ * @package   core
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class users extends \core_analytics\local\analyser\base {
+
+    /**
+     * The site users are the analysable elements returned by this analyser.
+     *
+     * @param string|null $action 'prediction', 'training' or null if no specific action needed.
+     * @param \context[] $contexts Only analysables that depend on the provided contexts. All analysables in the system if empty.
+     * @return \Iterator
+     */
+    public function get_analysables_iterator(?string $action = null, array $contexts = []) {
+        global $DB, $CFG;
+
+        $siteadmins = explode(',', $CFG->siteadmins);
+
+        list($sql, $params) = $this->get_iterator_sql('user', CONTEXT_USER, $action, 'u', $contexts);
+
+        $sql .= " AND u.deleted = :deleted AND u.confirmed = :confirmed AND u.suspended = :suspended";
+        $params = $params + ['deleted' => 0, 'confirmed' => 1, 'suspended' => 0];
+
+        $ordersql = $this->order_sql('timecreated', 'ASC', 'u');
+
+        $recordset = $DB->get_recordset_sql($sql, $params);
+        if (!$recordset->valid()) {
+            $this->add_log(get_string('nousersfound'));
+            return new \ArrayIterator([]);
+        }
+
+        return new \core\dml\recordset_walk($recordset, function($record) use ($siteadmins) {
+
+            if (in_array($record->id, $siteadmins) || isguestuser($record->id)) {
+                // Skip admins and the guest user.
+                return false;
+            }
+            $context = \context_helper::preload_from_record($record);
+            return \core_analytics\user::instance($record, $context);
+        });
+    }
+
+    /**
+     * Just one sample per analysable.
+     *
+     * @return bool
+     */
+    public static function one_sample_per_analysable() {
+        return true;
+    }
+
+    /**
+     * Samples origin is user table.
+     *
+     * @return string
+     */
+    public function get_samples_origin() {
+        return 'user';
+    }
+
+    /**
+     * Returns the analysable of a sample
+     *
+     * @param int $sampleid
+     * @return \core_analytics\analysable
+     */
+    public function get_sample_analysable($sampleid) {
+        return \core_analytics\user::instance($sampleid);
+    }
+
+    /**
+     * This provides samples' user and context.
+     *
+     * @return string[]
+     */
+    protected function provided_sample_data() {
+        return ['user', 'context'];
+    }
+
+    /**
+     * Returns the context of a sample.
+     *
+     * @param int $sampleid
+     * @return \context
+     */
+    public function sample_access_context($sampleid) {
+        return \context_user::instance($sampleid);
+    }
+
+    /**
+     * This will return just one user as we analyse users separately.
+     *
+     * @param \core_analytics\analysable $user
+     * @return array
+     */
+    public function get_all_samples(\core_analytics\analysable $user) {
+
+        $context = \context_user::instance($user->get_id());
+
+        // Just 1 sample per analysable.
+        return [
+            [$user->get_id() => $user->get_id()],
+            [$user->get_id() => ['user' => $user->get_user_data(), 'context' => $context]]
+        ];
+    }
+
+    /**
+     * Returns samples data from sample ids.
+     *
+     * @param int[] $sampleids
+     * @return array
+     */
+    public function get_samples($sampleids) {
+        global $DB;
+
+        list($sql, $params) = $DB->get_in_or_equal($sampleids, SQL_PARAMS_NAMED);
+        $users = $DB->get_records_select('user', "id $sql", $params);
+
+        $userids = array_keys($users);
+        $sampleids = array_combine($userids, $userids);
+
+        $users = array_map(function($user) {
+            return ['user' => $user, 'context' => \context_user::instance($user->id)];
+        }, $users);
+
+        // No related data attached.
+        return [$sampleids, $users];
+    }
+
+    /**
+     * Returns the description of a sample.
+     *
+     * @param int $sampleid
+     * @param int $contextid
+     * @param array $sampledata
+     * @return array array(string, \renderable)
+     */
+    public function sample_description($sampleid, $contextid, $sampledata) {
+        $description = fullname($sampledata['user']);
+        return [$description, new \user_picture($sampledata['user'])];
+    }
+
+    /**
+     * We need to delete associated data if a user requests his data to be deleted.
+     *
+     * @return bool
+     */
+    public function processes_user_data() {
+        return true;
+    }
+
+    /**
+     * Join the samples origin table with the user id table.
+     *
+     * @param string $sampletablealias
+     * @return string
+     */
+    public function join_sample_user($sampletablealias) {
+        return "JOIN {user} u ON u.id = {$sampletablealias}.sampleid";
+    }
+}

lib/classes/analytics/indicator/any_access_after_end.php

@@ -0,0 +1,88 @@
+<?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/>.
+
+/**
+ * Any access after the official end of the course.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Any access after the official end of the course.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class any_access_after_end extends \core_analytics\local\indicator\binary {
+
+    /**
+     * Returns the name.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('indicator:accessesafterend');
+    }
+
+    /**
+     * required_sample_data
+     *
+     * @return string[]
+     */
+    public static function required_sample_data() {
+        return array('user', 'course', 'context');
+    }
+
+    /**
+     * calculate_sample
+     *
+     * @param int $sampleid
+     * @param string $samplesorigin
+     * @param int $starttime
+     * @param int $endtime
+     * @return float
+     */
+    protected function calculate_sample($sampleid, $samplesorigin, $starttime = false, $endtime = false) {
+        global $DB;
+
+        $user = $this->retrieve('user', $sampleid);
+        $course = \core_analytics\course::instance($this->retrieve('course', $sampleid));
+
+        // Filter by context to use the db table index.
+        $context = $this->retrieve('context', $sampleid);
+        $select = "userid = :userid AND contextlevel = :contextlevel AND contextinstanceid = :contextinstanceid AND " .
+            "timecreated > :end";
+        $params = array('userid' => $user->id, 'contextlevel' => $context->contextlevel,
+            'contextinstanceid' => $context->instanceid, 'end' => $course->get_end());
+        $logstore = \core_analytics\manager::get_analytics_logstore();
+        $nlogs = $logstore->get_events_select_count($select, $params);
+        if ($nlogs) {
+            return self::get_max_value();
+        } else {
+            return self::get_min_value();
+        }
+
+    }
+}

lib/classes/analytics/indicator/any_access_before_start.php

@@ -0,0 +1,91 @@
+<?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/>.
+
+/**
+ * Any access before the official start of the course.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Any access before the official start of the course.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class any_access_before_start extends \core_analytics\local\indicator\binary {
+
+    /**
+     * Returns the name.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('indicator:accessesbeforestart');
+    }
+
+    /**
+     * required_sample_data
+     *
+     * @return string[]
+     */
+    public static function required_sample_data() {
+        return array('user', 'course', 'context');
+    }
+
+    /**
+     * calculate_sample
+     *
+     * @param int $sampleid
+     * @param string $samplesorigin
+     * @param int $starttime
+     * @param int $endtime
+     * @return float
+     */
+    protected function calculate_sample($sampleid, $samplesorigin, $starttime = false, $endtime = false) {
+        global $DB;
+
+        $user = $this->retrieve('user', $sampleid);
+        $course = \core_analytics\course::instance($this->retrieve('course', $sampleid));
+
+        if (!$logstore = \core_analytics\manager::get_analytics_logstore()) {
+            throw new \coding_exception('No available log stores');
+        }
+
+        // Filter by context to use the logstore_standard_log db table index.
+        $context = $this->retrieve('context', $sampleid);
+        $select = "userid = :userid AND contextlevel = :contextlevel AND contextinstanceid = :contextinstanceid AND " .
+            "timecreated < :start";
+        $params = array('userid' => $user->id, 'contextlevel' => $context->contextlevel,
+            'contextinstanceid' => $context->instanceid, 'start' => $course->get_start());
+
+        $nlogs = $logstore->get_events_select_count($select, $params);
+        if ($nlogs) {
+            return self::get_max_value();
+        } else {
+            return self::get_min_value();
+        }
+    }
+}

lib/classes/analytics/indicator/any_course_access.php

@@ -0,0 +1,138 @@
+<?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/>.
+
+/**
+ * Any access indicator.
+ *
+ * @package   core
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Any access indicator.
+ *
+ * @package   core
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class any_course_access extends \core_analytics\local\indicator\binary {
+
+    /** @var array user last access. */
+    protected $lastaccesses = [];
+
+    /**
+     * Returns the name.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('indicator:anycourseaccess');
+    }
+
+    /**
+     * required_sample_data
+     *
+     * @return string[]
+     */
+    public static function required_sample_data() {
+        return array('course', 'user');
+    }
+
+    /**
+     * Store userid => timeaccess relation if the provided analysable is a course.
+     *
+     * @param  \core_analytics\analysable $analysable
+     * @return null
+     */
+    public function fill_per_analysable_caches(\core_analytics\analysable $analysable) {
+        global $DB;
+
+        if ($analysable instanceof \core_analytics\course) {
+            // Indexed by userid (there is a UNIQUE KEY at DB level).
+            $this->lastaccesses = $DB->get_records('user_lastaccess', ['courseid' => $analysable->get_id()],
+                '', 'userid, timeaccess');
+        }
+    }
+
+    /**
+     * calculate_sample
+     *
+     * @param int $sampleid
+     * @param string $sampleorigin
+     * @param int $starttime
+     * @param int $endtime
+     * @return float
+     */
+    protected function calculate_sample($sampleid, $sampleorigin, $starttime = false, $endtime = false) {
+
+        $course = $this->retrieve('course', $sampleid);
+        $user = $this->retrieve('user', $sampleid);
+
+        // We first try using user_lastaccess as it is much faster than the log table.
+        if (empty($this->lastaccesses[$user->id]->timeaccess)) {
+            // The user never accessed.
+            return self::get_min_value();
+        } else if (!$starttime && !$endtime) {
+            // No time restrictions, so all good as long as there is a record.
+            return self::get_max_value();
+        } else if ($starttime && $this->lastaccesses[$user->id]->timeaccess < $starttime) {
+            // The last access is prior to $starttime.
+            return self::get_min_value();
+        } else if ($endtime && $this->lastaccesses[$user->id]->timeaccess < $endtime) {
+            // The last access is before the $endtime.
+            return self::get_max_value();
+        } else if ($starttime && !$endtime && $starttime <= $this->lastaccesses[$user->id]->timeaccess) {
+            // No end time, so max value as long as the last access is after $starttime.
+            return self::get_max_value();
+        }
+
+        // If the last access is after $endtime we can not know for sure if the user accessed or not
+        // between $starttime and $endtime, we need to check the logs table in this case. Note that
+        // it is unlikely that we will reach this point as this indicator will be used in models whose
+        // dates are in the past.
+
+        if (!$logstore = \core_analytics\manager::get_analytics_logstore()) {
+            throw new \coding_exception('No available log stores');
+        }
+
+        // Filter by context to use the logstore_standard_log db table index.
+        $select = "userid = :userid AND courseid = :courseid";
+        $params = ['courseid' => $course->id, 'userid' => $user->id];
+
+        if ($starttime) {
+            $select .= " AND timecreated > :starttime";
+            $params['starttime'] = $starttime;
+        }
+        if ($endtime) {
+            $select .= " AND timecreated <= :endtime";
+            $params['endtime'] = $endtime;
+        }
+
+        $nlogs = $logstore->get_events_select_count($select, $params);
+        if ($nlogs) {
+            return self::get_max_value();
+        } else {
+            return self::get_min_value();
+        }
+    }
+}

lib/classes/analytics/indicator/any_write_action.php

@@ -0,0 +1,106 @@
+<?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/>.
+
+/**
+ * Write actions indicator.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Write actions indicator.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class any_write_action extends \core_analytics\local\indicator\binary {
+
+    /**
+     * Returns the name.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('indicator:anywrite');
+    }
+
+    /**
+     * required_sample_data
+     *
+     * @return string[]
+     */
+    public static function required_sample_data() {
+        // User is not required, calculate_sample can handle its absence.
+        return array('context');
+    }
+
+    /**
+     * calculate_sample
+     *
+     * @param int $sampleid
+     * @param string $sampleorigin
+     * @param int $starttime
+     * @param int $endtime
+     * @return float
+     */
+    protected function calculate_sample($sampleid, $sampleorigin, $starttime = false, $endtime = false) {
+        global $DB;
+
+        $select = '';
+        $params = array();
+
+        if ($user = $this->retrieve('user', $sampleid)) {
+            $select .= "userid = :userid AND ";
+            $params = $params + array('userid' => $user->id);
+        }
+
+        if (!$logstore = \core_analytics\manager::get_analytics_logstore()) {
+            throw new \coding_exception('No available log stores');
+        }
+
+        // Filter by context to use the logstore_standard_log db table index.
+        $context = $this->retrieve('context', $sampleid);
+        $select .= "contextlevel = :contextlevel AND contextinstanceid = :contextinstanceid AND " .
+            "(crud = 'c' OR crud = 'u')";
+        $params = $params + array('contextlevel' => $context->contextlevel,
+            'contextinstanceid' => $context->instanceid);
+
+        if ($starttime) {
+            $select .= " AND timecreated > :starttime";
+            $params['starttime'] = $starttime;
+        }
+        if ($endtime) {
+            $select .= " AND timecreated <= :endtime";
+            $params['endtime'] = $endtime;
+        }
+
+        $nlogs = $logstore->get_events_select_count($select, $params);
+        if ($nlogs) {
+            return self::get_max_value();
+        } else {
+            return self::get_min_value();
+        }
+    }
+}

lib/classes/analytics/indicator/any_write_action_in_course.php

@@ -0,0 +1,101 @@
+<?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/>.
+
+/**
+ * Write actions in a course indicator.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Write actions in a course indicator.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class any_write_action_in_course extends \core_analytics\local\indicator\binary {
+
+    /**
+     * Returns the name.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('indicator:anywriteincourse');
+    }
+
+    /**
+     * required_sample_data
+     *
+     * @return string[]
+     */
+    public static function required_sample_data() {
+        // User is not required, calculate_sample can handle its absence.
+        return array('course');
+    }
+
+    /**
+     * calculate_sample
+     *
+     * @param int $sampleid
+     * @param string $sampleorigin
+     * @param int $starttime
+     * @param int $endtime
+     * @return float
+     */
+    protected function calculate_sample($sampleid, $sampleorigin, $starttime = false, $endtime = false) {
+        global $DB;
+
+        if (!$logstore = \core_analytics\manager::get_analytics_logstore()) {
+            throw new \coding_exception('No available log stores');
+        }
+
+        // Filter by context to use the logstore_standard_log db table index.
+        $course = $this->retrieve('course', $sampleid);
+        $select = "courseid = :courseid AND anonymous = :anonymous AND (crud = 'c' OR crud = 'u')";
+        $params = array('courseid' => $course->id, 'anonymous' => '0');
+
+        if ($user = $this->retrieve('user', $sampleid)) {
+            $select .= " AND userid = :userid";
+            $params['userid'] = $user->id;
+        }
+
+        if ($starttime) {
+            $select .= " AND timecreated > :starttime";
+            $params['starttime'] = $starttime;
+        }
+        if ($endtime) {
+            $select .= " AND timecreated <= :endtime";
+            $params['endtime'] = $endtime;
+        }
+
+        $nlogs = $logstore->get_events_select_count($select, $params);
+        if ($nlogs) {
+            return self::get_max_value();
+        } else {
+            return self::get_min_value();
+        }
+    }
+}

lib/classes/analytics/indicator/read_actions.php

@@ -0,0 +1,114 @@
+<?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/>.
+
+/**
+ * Read actions indicator.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\indicator;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Read actions indicator.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class read_actions extends \core_analytics\local\indicator\linear {
+
+    /**
+     * Returns the name.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('indicator:readactions');
+    }
+
+    /**
+     * required_sample_data
+     *
+     * @return string[]
+     */
+    public static function required_sample_data() {
+        // User is not required, calculate_sample can handle its absence.
+        return array('context');
+    }
+
+    /**
+     * calculate_sample
+     *
+     * @param int $sampleid
+     * @param string $sampleorigin
+     * @param int $starttime
+     * @param int $endtime
+     * @return float
+     */
+    protected function calculate_sample($sampleid, $sampleorigin, $starttime = false, $endtime = false) {
+
+        if (!$starttime || !$endtime) {
+            return null;
+        }
+
+        $select = '';
+        $params = array();
+
+        if ($user = $this->retrieve('user', $sampleid)) {
+            $select .= "userid = :userid AND ";
+            $params = $params + array('userid' => $user->id);
+        }
+
+        if (!$logstore = \core_analytics\manager::get_analytics_logstore()) {
+            throw new \coding_exception('No available log stores');
+        }
+
+        // Filter by context to use the logstore_standard_log db table index.
+        $context = $this->retrieve('context', $sampleid);
+        $select .= "contextlevel = :contextlevel AND contextinstanceid = :contextinstanceid AND " .
+            "crud = 'r' AND timecreated > :starttime AND timecreated <= :endtime";
+        $params = $params + array('contextlevel' => $context->contextlevel,
+            'contextinstanceid' => $context->instanceid, 'starttime' => $starttime, 'endtime' => $endtime);
+        $nrecords = $logstore->get_events_select_count($select, $params);
+        // We define a list of ranges to fit $nrecords into it
+        // # Done absolutely nothing
+        // # Not much really, just accessing the course once a week
+        // # More than just accessing the course, some interaction
+        // # Significant contribution, will depend on the course anyway.
+
+        // We need to adapt the limits to the time range duration.
+        $nweeks = $this->get_time_range_weeks_number($starttime, $endtime);
+
+        // Careful with this, depends on the course.
+        $limit = $nweeks * 3 * 10;
+        $ranges = array(
+            array('eq', 0),
+            // 1 course access per week (3 records are easily generated).
+            array('le', $nweeks * 3),
+            // 3 course accesses per week doing some stuff.
+            array('le', $limit),
+            array('gt', $limit)
+        );
+        return $this->classify_value($nrecords, $ranges);
+    }
+}

lib/classes/analytics/time_splitting/deciles.php

@@ -0,0 +1,59 @@
+<?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/>.
+
+/**
+ * 10 parts time splitting method.
+ *
+ * @package   core
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * 10 parts time splitting method.
+ *
+ * @package   core
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class deciles extends \core_analytics\local\time_splitting\equal_parts {
+
+    /**
+     * Returns a lang_string object representing the name for the time splitting method.
+     *
+     * Used as column identificator.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:deciles');
+    }
+
+    /**
+     * 10 parts.
+     *
+     * @return int
+     */
+    protected function get_number_parts() {
+        return 10;
+    }
+}

lib/classes/analytics/time_splitting/deciles_accum.php

@@ -0,0 +1,59 @@
+<?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/>.
+
+/**
+ * Range processor splitting the course in ten parts and accumulating data.
+ *
+ * @package   core
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Range processor splitting the course in ten parts and accumulating data.
+ *
+ * @package   core
+ * @copyright 2017 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class deciles_accum extends \core_analytics\local\time_splitting\accumulative_parts {
+
+    /**
+     * Returns a lang_string object representing the name for the time splitting method.
+     *
+     * Used as column identificator.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:decilesaccum');
+    }
+
+    /**
+     * 10 parts.
+     *
+     * @return int
+     */
+    protected function get_number_parts() {
+        return 10;
+    }
+}

lib/classes/analytics/time_splitting/no_splitting.php

@@ -0,0 +1,80 @@
+<?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/>.
+
+/**
+ * No time splitting method.
+ *
+ * Used when time is not a factor to consider into the equation.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * No time splitting method.
+ *
+ * Used when time is not a factor to consider into the equation.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class no_splitting extends \core_analytics\local\time_splitting\base {
+
+    /**
+     * Returns a lang_string object representing the name for the time splitting method.
+     *
+     * Used as column identificator.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:nosplitting');
+    }
+
+    /**
+     * ready_to_predict
+     *
+     * @param array $range
+     * @return true
+     */
+    public function ready_to_predict($range) {
+        return true;
+    }
+
+    /**
+     * define_ranges
+     *
+     * @return array
+     */
+    protected function define_ranges() {
+        return [
+            [
+                'start' => 0,
+                'end' => \core_analytics\analysable::MAX_TIME,
+                // Time is ignored as we overwrite ready_to_predict.
+                'time' => 0
+            ]
+        ];
+    }
+}

lib/classes/analytics/time_splitting/one_month_after_start.php

@@ -0,0 +1,56 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates predictions one month after the analysable start.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates predictions one month after the analysable start.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class one_month_after_start extends \core_analytics\local\time_splitting\after_start {
+
+    /**
+     * The time splitting method name.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:onemonthafterstart');
+    }
+
+    /**
+     * The period we should wait until we generate predictions for this.
+     *
+     * @param  \core_analytics\analysable $analysable Not used in this implementation.
+     * @return \DateInterval
+     */
+    protected function wait_period(\core_analytics\analysable $analysable) {
+        return new \DateInterval('P1M');
+    }
+}

lib/classes/analytics/time_splitting/one_week_after_start.php

@@ -0,0 +1,56 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates predictions one week after the analysable start.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates predictions one week after the analysable start.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class one_week_after_start extends \core_analytics\local\time_splitting\after_start {
+
+    /**
+     * The time splitting method name.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:oneweekafterstart');
+    }
+
+    /**
+     * The period we should wait until we generate predictions for this.
+     *
+     * @param  \core_analytics\analysable $analysable Not used in this implementation.
+     * @return \DateInterval
+     */
+    protected function wait_period(\core_analytics\analysable $analysable) {
+        return new \DateInterval('P1W');
+    }
+}

lib/classes/analytics/time_splitting/past_3_days.php

@@ -0,0 +1,55 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates predictions every 3 days.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates predictions every 3 days.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class past_3_days extends \core_analytics\local\time_splitting\past_periodic {
+
+    /**
+     * The time splitting method name.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:past3days');
+    }
+
+    /**
+     * Once every 3 days.
+     *
+     * @return \DateInterval
+     */
+    public function periodicity() {
+        return new \DateInterval('P3D');
+    }
+}

lib/classes/analytics/time_splitting/past_month.php

@@ -0,0 +1,55 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates monthly predictions.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates monthly predictions.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class past_month extends \core_analytics\local\time_splitting\past_periodic {
+
+    /**
+     * The time splitting method name.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:pastmonth');
+    }
+
+    /**
+     * Once a month.
+     *
+     * @return \DateInterval
+     */
+    public function periodicity() {
+        return new \DateInterval('P1M');
+    }
+}

lib/classes/analytics/time_splitting/past_week.php

@@ -0,0 +1,54 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates weekly predictions.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates weekly predictions.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class past_week extends \core_analytics\local\time_splitting\past_periodic {
+
+    /**
+     * The time splitting method name.
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:pastweek');
+    }
+
+    /**
+     * Once per week.
+     *
+     * @return \DateInterval
+     */
+    public function periodicity() {
+        return new \DateInterval('P1W');
+    }
+}

lib/classes/analytics/time_splitting/quarters.php

@@ -0,0 +1,59 @@
+<?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/>.
+
+/**
+ * Quarters time splitting method.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Quarters time splitting method.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class quarters extends \core_analytics\local\time_splitting\equal_parts {
+
+    /**
+     * Returns a lang_string object representing the name for the time spliting method.
+     *
+     * Used as column identificator.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:quarters');
+    }
+
+    /**
+     * 4 parts
+     *
+     * @return int
+     */
+    protected function get_number_parts() {
+        return 4;
+    }
+}

lib/classes/analytics/time_splitting/quarters_accum.php

@@ -0,0 +1,59 @@
+<?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/>.
+
+/**
+ * Range processor splitting the course in quarters and accumulating data.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Range processor splitting the course in quarters and accumulating data.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class quarters_accum extends \core_analytics\local\time_splitting\accumulative_parts {
+
+    /**
+     * Returns a lang_string object representing the name for the time spliting method.
+     *
+     * Used as column identificator.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:quartersaccum');
+    }
+
+    /**
+     * 4 parts.
+     *
+     * @return int
+     */
+    protected function get_number_parts() {
+        return 4;
+    }
+}

lib/classes/analytics/time_splitting/single_range.php

@@ -0,0 +1,67 @@
+<?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/>.
+
+/**
+ * Single time splitting method.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Single time splitting method.
+ *
+ * @package   core
+ * @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class single_range extends \core_analytics\local\time_splitting\base
+        implements \core_analytics\local\time_splitting\before_now {
+
+    /**
+     * Returns a lang_string object representing the name for the time spliting method.
+     *
+     * Used as column identificator.
+     *
+     * If there is a corresponding '_help' string this will be shown as well.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:singlerange');
+    }
+
+    /**
+     * One single range covering all analysable duration.
+     *
+     * @return array
+     */
+    protected function define_ranges() {
+        // Key 'time' == 0 because we want it to start predicting from the beginning.
+        return [
+            [
+                'start' => $this->analysable->get_start(),
+                'end' => $this->analysable->get_end(),
+                'time' => 0
+            ]
+        ];
+    }
+}

lib/classes/analytics/time_splitting/ten_percent_after_start.php

@@ -0,0 +1,81 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates predictions 3 days after the analysable start.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates predictions 3 days after the analysable start.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class ten_percent_after_start extends \core_analytics\local\time_splitting\after_start {
+
+    /**
+     * The time splitting method name.
+     *
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:tenpercentafterstart');
+    }
+
+    /**
+     * Extended as we require and end date here.
+     *
+     * @param \core_analytics\analysable $analysable
+     * @return bool
+     */
+    public function is_valid_analysable(\core_analytics\analysable $analysable) {
+
+        // We require an end date to calculate the 10%.
+        if (!$analysable->get_end()) {
+            return false;
+        }
+
+        return parent::is_valid_analysable($analysable);
+    }
+
+    /**
+     * The period we should wait until we generate predictions for this.
+     *
+     * @throws \coding_exception
+     * @param  \core_analytics\analysable $analysable
+     * @return \DateInterval
+     */
+    protected function wait_period(\core_analytics\analysable $analysable) {
+
+        if (!$analysable->get_end() || !$analysable->get_start()) {
+            throw new \coding_exception('Analysables with no start or end should be discarded in is_valid_analysable.');
+        }
+
+        $diff = $analysable->get_end() - $analysable->get_start();
+
+        // A 10% of $diff.
+        return new \DateInterval('PT' . intval($diff / 10) . 'S');
+    }
+}

lib/classes/analytics/time_splitting/upcoming_3_days.php

@@ -0,0 +1,53 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates insights every three days and calculates indicators using upcoming dates.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates insights every three days and calculates indicators using upcoming dates.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class upcoming_3_days extends \core_analytics\local\time_splitting\upcoming_periodic {
+
+    /**
+     * The time splitting method name.
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:upcoming3days');
+    }
+
+    /**
+     * Once every three days.
+     * @return \DateInterval
+     */
+    public function periodicity() {
+        return new \DateInterval('P3D');
+    }
+}

lib/classes/analytics/time_splitting/upcoming_fortnight.php

@@ -0,0 +1,53 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates insights every fortnight and calculates indicators using upcoming dates.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates insights every fortnight and calculates indicators using upcoming dates.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class upcoming_fortnight extends \core_analytics\local\time_splitting\upcoming_periodic {
+
+    /**
+     * The time splitting method name.
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:upcomingfortnight');
+    }
+
+    /**
+     * Every two weeks.
+     * @return \DateInterval
+     */
+    public function periodicity() {
+        return new \DateInterval('P2W');
+    }
+}

lib/classes/analytics/time_splitting/upcoming_week.php

@@ -0,0 +1,53 @@
+<?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/>.
+
+/**
+ * Time splitting method that generates weekly predictions.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core\analytics\time_splitting;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Time splitting method that generates weekly predictions.
+ *
+ * @package   core_analytics
+ * @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class upcoming_week extends \core_analytics\local\time_splitting\upcoming_periodic {
+
+    /**
+     * The time splitting method name.
+     * @return \lang_string
+     */
+    public static function get_name(): \lang_string {
+        return new \lang_string('timesplitting:upcomingweek');
+    }
+
+    /**
+     * Once per week.
+     * @return \DateInterval
+     */
+    public function periodicity() {
+        return new \DateInterval('P1W');
+    }
+}