MDL-75441 mod_forum: Show add new post button to guest users

enrol/self/lib.php

@@ -231,7 +231,7 @@ class enrol_self_plugin extends enrol_plugin {
      * @return bool|string true if successful, else error message or false.
      */
     public function can_self_enrol(stdClass $instance, $checkuserenrolment = true) {
-        global $CFG, $DB, $OUTPUT, $USER;
+        global $DB, $OUTPUT, $USER;
 
         if ($checkuserenrolment) {
             if (isguestuser()) {
@@ -244,8 +244,10 @@ class enrol_self_plugin extends enrol_plugin {
             }
         }
 
-        if ($instance->status != ENROL_INSTANCE_ENABLED) {
-            return get_string('canntenrol', 'enrol_self');
+        // Check if self enrolment is available right now for users.
+        $result = $this->is_self_enrol_available($instance);
+        if ($result !== true) {
+            return $result;
         }
 
         // Check if user has the capability to enrol in this context.
@@ -253,6 +255,23 @@ class enrol_self_plugin extends enrol_plugin {
             return get_string('canntenrol', 'enrol_self');
         }
 
+        return true;
+    }
+
+    /**
+     * Does this plugin support some way to self enrol?
+     * This function doesn't check user capabilities. Use can_self_enrol to check capabilities.
+     *
+     * @param stdClass $instance enrolment instance
+     * @return bool - true means "Enrol me in this course" link could be available
+     */
+    public function is_self_enrol_available(stdClass $instance) {
+        global $CFG, $DB, $USER;
+
+        if ($instance->status != ENROL_INSTANCE_ENABLED) {
+            return get_string('canntenrol', 'enrol_self');
+        }
+
         if ($instance->enrolstartdate != 0 and $instance->enrolstartdate > time()) {
             return get_string('canntenrolearly', 'enrol_self', userdate($instance->enrolstartdate));
         }

enrol/self/tests/self_test.php

@@ -630,6 +630,137 @@ class self_test extends \advanced_testcase {
         $this->assertSame($expectederrorstring, $selfplugin->can_self_enrol($instance1, true));
     }
 
+    /**
+     * Test is_self_enrol_available function behavior.
+     *
+     * @covers ::is_self_enrol_available
+     */
+    public function test_is_self_enrol_available() {
+        global $DB, $CFG;
+
+        $this->resetAfterTest();
+        $this->preventResetByRollback(); // Messaging does not like transactions...
+
+        $selfplugin = enrol_get_plugin('self');
+
+        $user1 = $this->getDataGenerator()->create_user();
+        $user2 = $this->getDataGenerator()->create_user();
+
+        $studentrole = $DB->get_record('role', ['shortname' => 'student'], '*', MUST_EXIST);
+        $course = $this->getDataGenerator()->create_course();
+        $cohort1 = $this->getDataGenerator()->create_cohort();
+        $cohort2 = $this->getDataGenerator()->create_cohort();
+
+        // New enrolments are allowed and enrolment instance is enabled.
+        $instance = $DB->get_record('enrol', ['courseid' => $course->id, 'enrol' => 'self'], '*', MUST_EXIST);
+        $instance->customint6 = 1;
+        $DB->update_record('enrol', $instance);
+        $selfplugin->update_status($instance, ENROL_INSTANCE_ENABLED);
+        $this->setUser($user1);
+        $this->assertTrue($selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertTrue($selfplugin->is_self_enrol_available($instance));
+
+        $canntenrolerror = get_string('canntenrol', 'enrol_self');
+
+        // New enrolments are not allowed, but enrolment instance is enabled.
+        $instance->customint6 = 0;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertEquals($canntenrolerror, $selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertEquals($canntenrolerror, $selfplugin->is_self_enrol_available($instance));
+
+        // New enrolments are allowed, but enrolment instance is disabled.
+        $instance->customint6 = 1;
+        $DB->update_record('enrol', $instance);
+        $selfplugin->update_status($instance, ENROL_INSTANCE_DISABLED);
+        $this->setUser($user1);
+        $this->assertEquals($canntenrolerror, $selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertEquals($canntenrolerror, $selfplugin->is_self_enrol_available($instance));
+
+        // New enrolments are not allowed and enrolment instance is disabled.
+        $instance->customint6 = 0;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertEquals($canntenrolerror, $selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertEquals($canntenrolerror, $selfplugin->is_self_enrol_available($instance));
+
+        // Enable enrolment instance for the rest of the tests.
+        $selfplugin->update_status($instance, ENROL_INSTANCE_ENABLED);
+
+        // Enrol start date is in future.
+        $instance->customint6 = 1;
+        $instance->enrolstartdate = time() + 60;
+        $DB->update_record('enrol', $instance);
+        $error = get_string('canntenrolearly', 'enrol_self', userdate($instance->enrolstartdate));
+        $this->setUser($user1);
+        $this->assertEquals($error, $selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertEquals($error, $selfplugin->is_self_enrol_available($instance));
+
+        // Enrol start date is in past.
+        $instance->enrolstartdate = time() - 60;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertTrue($selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertTrue($selfplugin->is_self_enrol_available($instance));
+
+        // Enrol end date is in future.
+        $instance->enrolstartdate = 0;
+        $instance->enrolenddate = time() + 60;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertTrue($selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertTrue($selfplugin->is_self_enrol_available($instance));
+
+        // Enrol end date is in past.
+        $instance->enrolenddate = time() - 60;
+        $DB->update_record('enrol', $instance);
+        $error = get_string('canntenrollate', 'enrol_self', userdate($instance->enrolenddate));
+        $this->setUser($user1);
+        $this->assertEquals($error, $selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertEquals($error, $selfplugin->is_self_enrol_available($instance));
+
+        // Maximum enrolments reached.
+        $instance->customint3 = 1;
+        $instance->enrolenddate = 0;
+        $DB->update_record('enrol', $instance);
+        $selfplugin->enrol_user($instance, $user2->id, $studentrole->id);
+        $error = get_string('maxenrolledreached', 'enrol_self');
+        $this->setUser($user1);
+        $this->assertEquals($error, $selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertEquals($error, $selfplugin->is_self_enrol_available($instance));
+
+        // Maximum enrolments not reached.
+        $instance->customint3 = 3;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertTrue($selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertTrue($selfplugin->is_self_enrol_available($instance));
+
+        require_once("$CFG->dirroot/cohort/lib.php");
+        cohort_add_member($cohort1->id, $user2->id);
+
+        // Cohort test.
+        $instance->customint5 = $cohort1->id;
+        $DB->update_record('enrol', $instance);
+        $error = get_string('cohortnonmemberinfo', 'enrol_self', $cohort1->name);
+        $this->setUser($user1);
+        $this->assertStringContainsString($error, $selfplugin->is_self_enrol_available($instance));
+        $this->setGuestUser();
+        $this->assertStringContainsString($error, $selfplugin->is_self_enrol_available($instance));
+        $this->setUser($user2);
+        $this->assertEquals($canntenrolerror, $selfplugin->is_self_enrol_available($instance));
+    }
+
     /**
      * Test enrol_self_check_group_enrolment_key
      */

enrol/tests/enrollib_test.php

@@ -1581,4 +1581,134 @@ class enrollib_test extends advanced_testcase {
         $this->assertTrue((int)$secondrun > (int)$firstrun);
     }
 
+    /**
+     * Test enrol_selfenrol_available function behavior.
+     *
+     * @covers ::enrol_selfenrol_available
+     */
+    public function test_enrol_selfenrol_available() {
+        global $DB, $CFG;
+
+        $this->resetAfterTest();
+        $this->preventResetByRollback(); // Messaging does not like transactions...
+
+        $selfplugin = enrol_get_plugin('self');
+
+        $user1 = $this->getDataGenerator()->create_user();
+        $user2 = $this->getDataGenerator()->create_user();
+
+        $studentrole = $DB->get_record('role', ['shortname' => 'student'], '*', MUST_EXIST);
+        $course = $this->getDataGenerator()->create_course();
+        $cohort1 = $this->getDataGenerator()->create_cohort();
+        $cohort2 = $this->getDataGenerator()->create_cohort();
+
+        // New enrolments are allowed and enrolment instance is enabled.
+        $instance = $DB->get_record('enrol', ['courseid' => $course->id, 'enrol' => 'self'], '*', MUST_EXIST);
+        $instance->customint6 = 1;
+        $DB->update_record('enrol', $instance);
+        $selfplugin->update_status($instance, ENROL_INSTANCE_ENABLED);
+        $this->setUser($user1);
+        $this->assertTrue(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertTrue(enrol_selfenrol_available($course->id));
+
+        $canntenrolerror = get_string('canntenrol', 'enrol_self');
+
+        // New enrolments are not allowed, but enrolment instance is enabled.
+        $instance->customint6 = 0;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+
+        // New enrolments are allowed, but enrolment instance is disabled.
+        $instance->customint6 = 1;
+        $DB->update_record('enrol', $instance);
+        $selfplugin->update_status($instance, ENROL_INSTANCE_DISABLED);
+        $this->setUser($user1);
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+
+        // New enrolments are not allowed and enrolment instance is disabled.
+        $instance->customint6 = 0;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+
+        // Enable enrolment instance for the rest of the tests.
+        $selfplugin->update_status($instance, ENROL_INSTANCE_ENABLED);
+
+        // Enrol start date is in future.
+        $instance->customint6 = 1;
+        $instance->enrolstartdate = time() + 60;
+        $DB->update_record('enrol', $instance);
+        $error = get_string('canntenrolearly', 'enrol_self', userdate($instance->enrolstartdate));
+        $this->setUser($user1);
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+
+        // Enrol start date is in past.
+        $instance->enrolstartdate = time() - 60;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertTrue(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertTrue(enrol_selfenrol_available($course->id));
+
+        // Enrol end date is in future.
+        $instance->enrolstartdate = 0;
+        $instance->enrolenddate = time() + 60;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertTrue(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertTrue(enrol_selfenrol_available($course->id));
+
+        // Enrol end date is in past.
+        $instance->enrolenddate = time() - 60;
+        $DB->update_record('enrol', $instance);
+        $error = get_string('canntenrollate', 'enrol_self', userdate($instance->enrolenddate));
+        $this->setUser($user1);
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+
+        // Maximum enrolments reached.
+        $instance->customint3 = 1;
+        $instance->enrolenddate = 0;
+        $DB->update_record('enrol', $instance);
+        $selfplugin->enrol_user($instance, $user2->id, $studentrole->id);
+        $error = get_string('maxenrolledreached', 'enrol_self');
+        $this->setUser($user1);
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+
+        // Maximum enrolments not reached.
+        $instance->customint3 = 3;
+        $DB->update_record('enrol', $instance);
+        $this->setUser($user1);
+        $this->assertTrue(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertTrue(enrol_selfenrol_available($course->id));
+
+        require_once("$CFG->dirroot/cohort/lib.php");
+        cohort_add_member($cohort1->id, $user2->id);
+
+        // Cohort test.
+        $instance->customint5 = $cohort1->id;
+        $DB->update_record('enrol', $instance);
+        $error = get_string('cohortnonmemberinfo', 'enrol_self', $cohort1->name);
+        $this->setUser($user1);
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+        $this->setGuestUser();
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+        $this->setUser($user2);
+        $this->assertFalse(enrol_selfenrol_available($course->id));
+    }
 }

enrol/upgrade.txt

@@ -1,6 +1,10 @@
 This files describes API changes in /enrol/* - plugins,
 information provided here is intended especially for developers.
 
+=== 4.2 ===
+
+* New is_self_enrol_available() function has been created. Similar to can_self_enrol but without checking user capabilities.
+
 === 4.0 ===
 
 * Final deprecation of the following webservice:

lib/enrollib.php

@@ -1235,7 +1235,12 @@ function enrol_selfenrol_available($courseid) {
         if ($instance->enrol === 'guest') {
             continue;
         }
-        if ($plugins[$instance->enrol]->show_enrolme_link($instance)) {
+        if ((isguestuser() || !isloggedin()) &&
+            ($plugins[$instance->enrol]->is_self_enrol_available($instance) === true)) {
+            $result = true;
+            break;
+        }
+        if ($plugins[$instance->enrol]->show_enrolme_link($instance) === true) {
             $result = true;
             break;
         }
@@ -2011,6 +2016,17 @@ abstract class enrol_plugin {
         return false;
     }
 
+    /**
+     * Does this plugin support some way to self enrol?
+     * This function doesn't check user capabilities. Use can_self_enrol to check capabilities.
+     *
+     * @param stdClass $instance enrolment instance
+     * @return bool - true means "Enrol me in this course" link could be available.
+     */
+    public function is_self_enrol_available(stdClass $instance) {
+        return false;
+    }
+
     /**
      * Attempt to automatically enrol current user in course without any interaction,
      * calling code has to make sure the plugin and instance are active.

mod/forum/templates/discussion_list.mustache

@@ -62,13 +62,13 @@
         {{/forum.capabilities.create}}
         {{^forum.capabilities.create}}
             {{#forum.capabilities.selfenrol}}
-                <div class="py-3">
+                {{#enablediscussioncreation}}
                     <a class="btn btn-primary" href="{{forum.urls.create}}">
                         {{$discussion_create_text}}
                             {{#str}}addanewdiscussion, forum{{/str}}
                         {{/discussion_create_text}}
                     </a>
-                </div>
+                {{/enablediscussioncreation}}
             {{/forum.capabilities.selfenrol}}
         {{/forum.capabilities.create}}
         {{#forum.capabilities.grade}}

mod/forum/templates/forum_new_discussion_actionbar.mustache

@@ -47,3 +47,10 @@
         {{#str}}addanewdiscussion, forum{{/str}}
     </a>
 {{/forum.capabilities.create}}
+{{^forum.capabilities.create}}
+    {{#forum.capabilities.selfenrol}}
+        <a class="btn btn-primary" href="{{forum.urls.create}}">
+            {{#str}}addanewdiscussion, forum{{/str}}
+        </a>
+    {{/forum.capabilities.selfenrol}}
+{{/forum.capabilities.create}}

mod/forum/tests/behat/guest_users.feature

@@ -0,0 +1,143 @@
+@mod @mod_forum @javascript
+Feature: Guest and not logged users could see the option to add new post or reply
+  In order to guide users to create an account
+  As a guest or not logged user
+  I want to see the option to add new post or reply
+
+  Background:
+    Given the following config values are set as admin:
+      | enrol_guest | Yes |
+    And the following "users" exist:
+      | username | firstname | lastname | email                |
+      | teacher  | Teacher   | 1        | teacher@example.com |
+    And the following "courses" exist:
+      | fullname | shortname | category |
+      | Course 1 | C1        | 0        |
+    And the following "course enrolments" exist:
+      | user    | course | role           |
+      | teacher | C1     | editingteacher |
+    And I am on the "Course 1" "enrolment methods" page logged in as teacher
+    And I click on "Enable" "link" in the "Guest access" "table_row"
+
+  Scenario Outline: As a not enrolled guest I don't see the option to add a new discussion
+    Given the following "activities" exist:
+      | activity | name       | course | idnumber | type   |
+      | forum    | Forum      | C1     | forum    | <type> |
+    And I add a new discussion to "Forum" forum with:
+      | Subject | Forum discussion 1 |
+      | Message | How awesome is this forum discussion? |
+    And I log out
+    And I am on "Course 1" course homepage
+    When I press "Log in as a guest"
+    And I am on the "Forum" "forum activity" page
+    Then I should not see "Add discussion topic"
+    And I should see "Forum discussion 1"
+    And I click on "Forum discussion 1" "link"
+    And I should not see "Reply"
+
+    Examples:
+      | type       |
+      | general    |
+      | eachuser   |
+      | qanda      |
+
+  Scenario: As a not enrolled guest I don't see the option to add a new discussion in a single forum
+    Given the following "activities" exist:
+      | activity | name                      | course | idnumber | type   |
+      | forum    | Forum (single discussion) | C1     | forum    | single |
+    And I log out
+    And I am on "Course 1" course homepage
+    When I press "Log in as a guest"
+    And I am on the "Forum (single discussion)" "forum activity" page
+    Then I should not see "Add discussion topic"
+    And I should see "Forum (single discussion)"
+    And I should not see "Reply"
+
+  Scenario: As a not enrolled guest I don't see the option to add a new discussion in a blog type forum
+    Given the following "activities" exist:
+      | activity | name  | course | idnumber | type   |
+      | forum    | Forum | C1     | forum    | blog |
+    And I add a new discussion to "Forum" forum with:
+      | Subject | Forum discussion 1 |
+      | Message | How awesome is this forum discussion? |
+    And I log out
+    And I am on "Course 1" course homepage
+    When I press "Log in as a guest"
+    And I am on the "Forum" "forum activity" page
+    Then I should not see "Add discussion topic"
+    And I should see "Forum discussion 1"
+    And I should not see "Reply"
+
+  Scenario Outline: As an enrolled guest I see the option to add a new discussion
+    Given I am on the "Course 1" "enrolment methods" page logged in as teacher
+    And I click on "Enable" "link" in the "Self enrolment" "table_row"
+    And the following "activities" exist:
+      | activity | name       | course | idnumber | type   |
+      | forum    | Forum      | C1     | forum    | <type> |
+    And I add a new discussion to "Forum" forum with:
+      | Subject | Forum discussion 1 |
+      | Message | How awesome is this forum discussion? |
+    And I log out
+    And I am on "Course 1" course homepage
+    When I press "Log in as a guest"
+    And I am on the "Forum" "forum activity" page
+    Then I should see "Add discussion topic"
+    And I click on "Add discussion topic" "link"
+    And I should see "Sorry, guests are not allowed to post"
+    And I click on "Cancel" "button"
+    And I should see "Forum discussion 1"
+    And I click on "Forum discussion 1" "link"
+    And I should see "Reply"
+    And I click on "Reply" "link"
+    And I should see "Sorry, guests are not allowed to post"
+    And I click on "Continue" "button"
+    And I should see "Log in"
+
+    Examples:
+      | type       |
+      | general    |
+      | eachuser   |
+      | qanda      |
+
+  Scenario: As an enrolled guest I see the option to reply in a single forum
+    Given I am on the "Course 1" "enrolment methods" page logged in as teacher
+    And I click on "Enable" "link" in the "Self enrolment" "table_row"
+    And the following "activities" exist:
+      | activity | name                      | course | idnumber | type   |
+      | forum    | Forum (single discussion) | C1     | forum    | single |
+    And I log out
+    And I am on "Course 1" course homepage
+    When I press "Log in as a guest"
+    And I am on the "Forum (single discussion)" "forum activity" page
+    And I should see "Forum (single discussion)"
+    Then I should see "Reply"
+    And I click on "Reply" "link"
+    And I should see "Sorry, guests are not allowed to post"
+    And I click on "Cancel" "button"
+    And I should see "Reply"
+    And I click on "Reply" "link"
+    And I click on "Continue" "button"
+    And I should see "Log in"
+
+  Scenario: As an enrolled guest I see the option to reply in a blog type forum
+    Given I am on the "Course 1" "enrolment methods" page logged in as teacher
+    And I click on "Enable" "link" in the "Self enrolment" "table_row"
+    And the following "activities" exist:
+      | activity | name       | course | idnumber | type   |
+      | forum    | Forum      | C1     | forum    | blog |
+    And I add a new discussion to "Forum" forum with:
+      | Subject | Forum discussion 1 |
+      | Message | How awesome is this forum discussion? |
+    And I log out
+    And I am on "Course 1" course homepage
+    When I press "Log in as a guest"
+    And I am on the "Forum" "forum activity" page
+    Then I should see "Add discussion topic"
+    And I click on "Add discussion topic" "link"
+    And I should see "Sorry, guests are not allowed to post"
+    And I click on "Cancel" "button"
+    And I should see "Forum discussion 1"
+    And I click on "Add discussion topic" "link"
+    And I should see "Sorry, guests are not allowed to post"
+    And I click on "Continue" "button"
+    And I should see "Log in"