MDL-70820 mod_survey: custom completion implementation

mod/survey/classes/completion/custom_completion.php

@@ -0,0 +1,70 @@
+<?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/>.
+
+declare(strict_types=1);
+
+namespace mod_survey\completion;
+
+use core_completion\activity_custom_completion;
+
+/**
+ * Activity custom completion subclass for the survey activity.
+ *
+ * Class for defining mod_survey's custom completion rules and fetching the completion statuses
+ * of the custom completion rules for a given survey instance and a user.
+ *
+ * @package mod_survey
+ * @copyright Simey Lameze <simey@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class custom_completion extends activity_custom_completion {
+
+    /**
+     * Fetches the completion state for a given completion rule.
+     *
+     * @param string $rule The completion rule.
+     * @return int The completion state.
+     */
+    public function get_state(string $rule): int {
+        global $DB;
+
+        $this->validate_rule($rule);
+
+        // Survey only supports completionsubmit as a custom rule.
+        $status = $DB->record_exists('survey_answers', ['survey' => $this->cm->instance, 'userid' => $this->userid]);
+        return $status ? COMPLETION_COMPLETE : COMPLETION_INCOMPLETE;
+    }
+
+    /**
+     * Fetch the list of custom completion rules that this module defines.
+     *
+     * @return array
+     */
+    public static function get_defined_custom_rules(): array {
+        return ['completionsubmit'];
+    }
+
+    /**
+     * Returns an associative array of the descriptions of custom completion rules.
+     *
+     * @return array
+     */
+    public function get_custom_rule_descriptions(): array {
+        return [
+            'completionsubmit' => get_string('completiondetail:submit', 'survey')
+        ];
+    }
+}

mod/survey/lang/en/survey.php

@@ -82,6 +82,7 @@ $string['attls9short'] = 'argue with authors';
 $string['cannotfindanswer'] = 'There are no answers for this survey yet.';
 $string['cannotfindquestion'] = 'Question doesn\'t exist';
 $string['cannotfindsurveytmpt'] = 'No survey templates found!';
+$string['completiondetail:submit'] = 'Submit answers';
 $string['completionsubmit'] = 'Student must submit to this activity to complete it';
 $string['ciqintro'] = 'While thinking about recent events in this class, answer the questions below.';
 $string['ciqname'] = 'Critical incidents';

mod/survey/tests/custom_completion_test.php

@@ -0,0 +1,217 @@
+<?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/>.
+
+/**
+ * Contains unit tests for core_completion/activity_custom_completion.
+ *
+ * @package   mod_survey
+ * @copyright Simey Lameze <simey@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+declare(strict_types=1);
+
+namespace mod_survey;
+
+use advanced_testcase;
+use cm_info;
+use coding_exception;
+use mod_survey\completion\custom_completion;
+use moodle_exception;
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+require_once($CFG->libdir . '/completionlib.php');
+
+/**
+ * Class for unit testing mod_survey/activity_custom_completion.
+ *
+ * @package   mod_survey
+ * @copyright Simey Lameze <simey@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class activity_custom_completion_test extends advanced_testcase {
+
+    /**
+     * Data provider for get_state().
+     *
+     * @return array[]
+     */
+    public function get_state_provider(): array {
+        return [
+            'Undefined rule' => [
+                'somenonexistentrule', COMPLETION_DISABLED, false, null, coding_exception::class
+            ],
+            'Rule not available' => [
+                'completionsubmit', COMPLETION_DISABLED, false, null, moodle_exception::class
+            ],
+            'Rule available, user has not submitted' => [
+                'completionsubmit', COMPLETION_ENABLED, false, COMPLETION_INCOMPLETE, null
+            ],
+            'Rule available, user has submitted' => [
+                'completionsubmit', COMPLETION_ENABLED, true, COMPLETION_COMPLETE, null
+            ],
+        ];
+    }
+
+    /**
+     * Test for get_state().
+     *
+     * @dataProvider get_state_provider
+     * @param string $rule The custom completion rule.
+     * @param int $available Whether this rule is available.
+     * @param bool $submitted
+     * @param int|null $status Expected status.
+     * @param string|null $exception Expected exception.
+     */
+    public function test_get_state(string $rule, int $available, ?bool $submitted, ?int $status, ?string $exception) {
+        global $DB;
+
+        if (!is_null($exception)) {
+            $this->expectException($exception);
+        }
+
+        // Custom completion rule data for cm_info::customdata.
+        $customdataval = [
+            'customcompletionrules' => [
+                $rule => $available
+            ]
+        ];
+
+        // Build a mock cm_info instance.
+        $mockcminfo = $this->getMockBuilder(cm_info::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['__get'])
+            ->getMock();
+
+        // Mock the return of the magic getter method when fetching the cm_info object's customdata and instance values.
+        $mockcminfo->expects($this->any())
+            ->method('__get')
+            ->will($this->returnValueMap([
+                ['customdata', $customdataval],
+                ['instance', 1],
+            ]));
+
+        // Mock the DB calls.
+        $DB = $this->createMock(get_class($DB));
+        $DB->expects($this->atMost(1))
+            ->method('record_exists')
+            ->willReturn($submitted);
+
+        $customcompletion = new custom_completion($mockcminfo, 2);
+        $this->assertEquals($status, $customcompletion->get_state($rule));
+    }
+
+    /**
+     * Test for get_defined_custom_rules().
+     */
+    public function test_get_defined_custom_rules() {
+        $rules = custom_completion::get_defined_custom_rules();
+        $this->assertCount(1, $rules);
+        $this->assertEquals('completionsubmit', reset($rules));
+    }
+
+    /**
+     * Test for get_defined_custom_rule_descriptions().
+     */
+    public function test_get_custom_rule_descriptions() {
+        // Get defined custom rules.
+        $rules = custom_completion::get_defined_custom_rules();
+
+        // Build a mock cm_info instance.
+        $mockcminfo = $this->getMockBuilder(cm_info::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['__get'])
+            ->getMock();
+
+        // Instantiate a custom_completion object using the mocked cm_info.
+        $customcompletion = new custom_completion($mockcminfo, 1);
+
+        // Get custom rule descriptions.
+        $ruledescriptions = $customcompletion->get_custom_rule_descriptions();
+
+        // Confirm that defined rules and rule descriptions are consistent with each other.
+        $this->assertEquals(count($rules), count($ruledescriptions));
+        foreach ($rules as $rule) {
+            $this->assertArrayHasKey($rule, $ruledescriptions);
+        }
+    }
+
+    /**
+     * Test for is_defined().
+     */
+    public function test_is_defined() {
+        // Build a mock cm_info instance.
+        $mockcminfo = $this->getMockBuilder(cm_info::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $customcompletion = new custom_completion($mockcminfo, 1);
+
+        // Rule is defined.
+        $this->assertTrue($customcompletion->is_defined('completionsubmit'));
+
+        // Undefined rule.
+        $this->assertFalse($customcompletion->is_defined('somerandomrule'));
+    }
+
+    /**
+     * Data provider for test_get_available_custom_rules().
+     *
+     * @return array[]
+     */
+    public function get_available_custom_rules_provider(): array {
+        return [
+            'Completion submit available' => [
+                COMPLETION_ENABLED, ['completionsubmit']
+            ],
+            'Completion submit not available' => [
+                COMPLETION_DISABLED, []
+            ],
+        ];
+    }
+
+    /**
+     * Test for get_available_custom_rules().
+     *
+     * @dataProvider get_available_custom_rules_provider
+     * @param int $status
+     * @param array $expected
+     */
+    public function test_get_available_custom_rules(int $status, array $expected) {
+        $customdataval = [
+            'customcompletionrules' => [
+                'completionsubmit' => $status
+            ]
+        ];
+
+        // Build a mock cm_info instance.
+        $mockcminfo = $this->getMockBuilder(cm_info::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['__get'])
+            ->getMock();
+
+        // Mock the return of magic getter for the customdata attribute.
+        $mockcminfo->expects($this->any())
+            ->method('__get')
+            ->with('customdata')
+            ->willReturn($customdataval);
+
+        $customcompletion = new custom_completion($mockcminfo, 1);
+        $this->assertEquals($expected, $customcompletion->get_available_custom_rules());
+    }
+}