MDL-69269 contentbank: add support to download content

contentbank/classes/contenttype.php

@@ -46,6 +46,11 @@ abstract class contenttype {
     /** Plugin implements edition feature */
     const CAN_EDIT = 'edit';
 
+    /** Plugin implements download feature
+     *  @since  Moodle 3.10
+    */
+    const CAN_DOWNLOAD = 'download';
+
     /** @var \context This contenttype's context. **/
     protected $context = null;
 
@@ -220,6 +225,31 @@ abstract class contenttype {
         return '';
     }
 
+    /**
+     * Returns the URL to download the content.
+     *
+     * @since  Moodle 3.10
+     * @param  content $content The content to be downloaded.
+     * @return string           URL with the content to download.
+     */
+    public function get_download_url(content $content): string {
+        $downloadurl = '';
+        $file = $content->get_file();
+        if (!empty($file)) {
+            $url  = \moodle_url::make_pluginfile_url(
+                $file->get_contextid(),
+                $file->get_component(),
+                $file->get_filearea(),
+                $file->get_itemid(),
+                $file->get_filepath(),
+                $file->get_filename()
+            );
+            $downloadurl = $url->out(false);
+        }
+
+        return $downloadurl;
+    }
+
     /**
      * Returns the HTML code to render the icon for content bank contents.
      *
@@ -392,6 +422,38 @@ abstract class contenttype {
         return true;
     }
 
+    /**
+     * Returns whether or not the user has permission to download the content.
+     *
+     * @since  Moodle 3.10
+     * @param  content $content The content to be downloaded.
+     * @return bool    True if the user can download the content. False otherwise.
+     */
+    final public function can_download(content $content): bool {
+        if (!$this->is_feature_supported(self::CAN_DOWNLOAD)) {
+            return false;
+        }
+
+        if (!$this->can_access()) {
+            return false;
+        }
+
+        $hascapability = has_capability('moodle/contentbank:downloadcontent', $this->context);
+        return $hascapability && $this->is_download_allowed($content);
+    }
+
+    /**
+     * Returns plugin allows downloading.
+     *
+     * @since  Moodle 3.10
+     * @param  content $content The content to be downloaed.
+     * @return bool    True if plugin allows downloading. False otherwise.
+     */
+    protected function is_download_allowed(content $content): bool {
+        // Plugins can overwrite this function to add any check they need.
+        return true;
+    }
+
     /**
      * Returns the plugin supports the feature.
      *

contentbank/contenttype/h5p/classes/contenttype.php

@@ -110,7 +110,7 @@ class contenttype extends \core_contentbank\contenttype {
      * @return array
      */
     protected function get_implemented_features(): array {
-        return [self::CAN_UPLOAD, self::CAN_EDIT];
+        return [self::CAN_UPLOAD, self::CAN_EDIT, self::CAN_DOWNLOAD];
     }
 
     /**

contentbank/contenttype/h5p/tests/contenttype_h5p_test.php

@@ -147,4 +147,40 @@ class contenttype_h5p_contenttype_plugin_testcase extends advanced_testcase {
         $this->assertNotEquals($defaulticon, $findicon);
         $this->assertContains('find', $findicon, '', true);
     }
+
+    /**
+     * Tests get_download_url result.
+     *
+     * @covers ::get_download_url
+     */
+    public function test_get_download_url() {
+        global $CFG;
+
+        $this->resetAfterTest();
+        $systemcontext = context_system::instance();
+        $this->setAdminUser();
+        $contenttype = new contenttype_h5p\contenttype($systemcontext);
+
+        // Add an H5P fill the blanks file to the content bank.
+        $filename = 'filltheblanks.h5p';
+        $filepath = $CFG->dirroot . '/h5p/tests/fixtures/' . $filename;
+        $generator = $this->getDataGenerator()->get_plugin_generator('core_contentbank');
+        $contents = $generator->generate_contentbank_data('contenttype_h5p', 1, 0, $systemcontext, true, $filepath);
+        $filltheblanks = array_shift($contents);
+
+        // Check before deploying the URL is returned OK.
+        $url1 = $contenttype->get_download_url($filltheblanks);
+        $this->assertNotEmpty($url1);
+        $this->assertContains($filename, $url1);
+
+        // Deploy the contents though the player to create the H5P DB entries and know specific content type.
+        $h5pplayer = new \core_h5p\player($filltheblanks->get_file_url(), new \stdClass(), true);
+        $h5pplayer->add_assets_to_page();
+        $h5pplayer->output();
+
+        // Once the H5P has been deployed, the URL is still the same.
+        $url2 = $contenttype->get_download_url($filltheblanks);
+        $this->assertNotEmpty($url2);
+        $this->assertEquals($url1, $url2);
+    }
 }

contentbank/tests/behat/download_content.feature

@@ -0,0 +1,61 @@
+@core @core_contentbank @contentbank_h5p @_file_upload @javascript
+Feature: Download H5P content from the content bank
+  In order export H5P content from the content bank
+  As an admin
+  I need to be able to download any H5P content from the content bank
+
+  Background:
+    Given the following "users" exist:
+      | username    | firstname | lastname | email              |
+      | manager     | Max       | Manager  | man@example.com    |
+    And the following "role assigns" exist:
+      | user        | role      | contextlevel  | reference     |
+      | manager     | manager   | System        |               |
+    And the following "contentbank content" exist:
+      | contextlevel | reference | contenttype     | user    | contentname              | filepath                               |
+      | System       |           | contenttype_h5p | admin   | filltheblanksadmin.h5p   | /h5p/tests/fixtures/filltheblanks.h5p  |
+      | System       |           | contenttype_h5p | manager | filltheblanksmanager.h5p | /h5p/tests/fixtures/filltheblanks.h5p  |
+    And I log in as "admin"
+    And I am on site homepage
+    And I turn editing mode on
+    And I add the "Navigation" block if not present
+    And I configure the "Navigation" block
+    And I set the following fields to these values:
+      | Page contexts | Display throughout the entire site |
+    And I press "Save changes"
+
+  Scenario: Admins can download content from the content bank
+    Given I click on "Site pages" "list_item" in the "Navigation" "block"
+    And I click on "Content bank" "link" in the "Navigation" "block"
+    And I follow "filltheblanksmanager.h5p"
+    And I open the action menu in "region-main-settings-menu" "region"
+    And I should see "Download"
+    When I choose "Download" in the open action menu
+    Then I should see "filltheblanksmanager.h5p"
+
+  Scenario: Users can download content created by different users
+    Given the following "permission overrides" exist:
+      | capability                            | permission | role    | contextlevel | reference |
+      | moodle/contentbank:manageanycontent   | Prohibit   | manager | System       |           |
+    And I log out
+    And I log in as "manager"
+    When I click on "Site pages" "list_item" in the "Navigation" "block"
+    And I click on "Content bank" "link" in the "Navigation" "block"
+    And I should see "filltheblanksadmin.h5p"
+    And I follow "filltheblanksadmin.h5p"
+    And I open the action menu in "region-main-settings-menu" "region"
+    Then I should see "Download"
+    And I should not see "Rename"
+
+  Scenario: Users without the required capability cannot download content
+    Given the following "permission overrides" exist:
+      | capability                            | permission | role    | contextlevel | reference |
+      | moodle/contentbank:downloadcontent    | Prohibit   | manager | System       |           |
+    And I log out
+    And I log in as "manager"
+    When I click on "Site pages" "list_item" in the "Navigation" "block"
+    And I click on "Content bank" "link" in the "Navigation" "block"
+    And I should see "filltheblanksmanager.h5p"
+    And I follow "filltheblanksmanager.h5p"
+    And I open the action menu in "region-main-settings-menu" "region"
+    Then I should not see "Download"

contentbank/tests/contenttype_test.php

@@ -348,7 +348,7 @@ class core_contenttype_contenttype_testcase extends \advanced_testcase {
     /**
      * Helper function to setup 3 users (manager1, manager2 and user) and 4 contents (3 created by manager1 and 1 by user).
      */
-    protected function contenttype_setup_scenario_data(): void {
+    protected function contenttype_setup_scenario_data(string $contenttype = 'contenttype_testable'): void {
         global $DB;
         $systemcontext = context_system::instance();
 
@@ -358,14 +358,17 @@ class core_contenttype_contenttype_testcase extends \advanced_testcase {
         $this->managerroleid = $DB->get_field('role', 'id', array('shortname' => 'manager'));
         $this->getDataGenerator()->role_assign($this->managerroleid, $this->manager1->id);
         $this->getDataGenerator()->role_assign($this->managerroleid, $this->manager2->id);
+        $editingteacherrolerid = $DB->get_field('role', 'id', ['shortname' => 'editingteacher']);
         $this->user = $this->getDataGenerator()->create_user();
+        $this->getDataGenerator()->role_assign($editingteacherrolerid, $this->user->id);
 
         // Add some content to the content bank.
         $generator = $this->getDataGenerator()->get_plugin_generator('core_contentbank');
-        $this->contents[$this->manager1->id] = $generator->generate_contentbank_data(null, 3, $this->manager1->id);
+        $this->contents[$this->manager1->id] = $generator->generate_contentbank_data($contenttype, 3, $this->manager1->id);
-        $this->contents[$this->user->id] = $generator->generate_contentbank_data(null, 1, $this->user->id);
+        $this->contents[$this->user->id] = $generator->generate_contentbank_data($contenttype, 1, $this->user->id);
 
-        $this->contenttype = new \contenttype_testable\contenttype($systemcontext);
+        $contenttypeclass = "\\$contenttype\\contenttype";
+        $this->contenttype = new $contenttypeclass($systemcontext);
     }
 
     /**
@@ -510,4 +513,70 @@ class core_contenttype_contenttype_testcase extends \advanced_testcase {
         $this->assertFalse($contenttype->can_manage($contentbyteacher));
         $this->assertFalse($contenttype->can_manage($contentbyadmin));
     }
+
+    /**
+     * Test the behaviour of can_download().
+     *
+     * @covers ::can_download
+     */
+    public function test_can_download() {
+        global $DB;
+
+        $this->resetAfterTest();
+        $this->contenttype_setup_scenario_data('contenttype_h5p');
+
+        $managercontent = array_shift($this->contents[$this->manager1->id]);
+        $usercontent = array_shift($this->contents[$this->user->id]);
+
+        // Check the content has been created as expected.
+        $records = $DB->count_records('contentbank_content');
+        $this->assertEquals(4, $records);
+
+        // Check user can download content created by anybody.
+        $this->setUser($this->user);
+        $this->assertTrue($this->contenttype->can_download($usercontent));
+        $this->assertTrue($this->contenttype->can_download($managercontent));
+
+        // Check manager can download all the content too.
+        $this->setUser($this->manager1);
+        $this->assertTrue($this->contenttype->can_download($managercontent));
+        $this->assertTrue($this->contenttype->can_download($usercontent));
+
+        // Unassign capability to manager role and check she cannot download content anymore.
+        unassign_capability('moodle/contentbank:downloadcontent', $this->managerroleid);
+        $this->assertFalse($this->contenttype->can_download($managercontent));
+        $this->assertFalse($this->contenttype->can_download($usercontent));
+    }
+
+    /**
+     * Tests get_download_url result.
+     *
+     * @covers ::get_download_url
+     */
+    public function test_get_download_url() {
+        global $CFG;
+
+        $this->resetAfterTest();
+        $this->setAdminUser();
+        $systemcontext = context_system::instance();
+
+        // Add some content to the content bank.
+        $filename = 'filltheblanks.h5p';
+        $filepath = $CFG->dirroot . '/h5p/tests/fixtures/' . $filename;
+        $generator = $this->getDataGenerator()->get_plugin_generator('core_contentbank');
+        $contents = $generator->generate_contentbank_data('contenttype_testable', 1, 0, $systemcontext, true, $filepath);
+        $content = array_shift($contents);
+
+        // Check the URL is returned OK for a content with file.
+        $contenttype = new contenttype($systemcontext);
+        $url = $contenttype->get_download_url($content);
+        $this->assertNotEmpty($url);
+        $this->assertContains($filename, $url);
+
+        // Check the URL is empty when the content hasn't any file.
+        $record = new stdClass();
+        $content = $contenttype->create_content($record);
+        $url = $contenttype->get_download_url($content);
+        $this->assertEmpty($url);
+    }
 }

contentbank/view.php

@@ -84,6 +84,15 @@ if ($contenttype->can_manage($content)) {
         $attributes
     ));
 }
+if ($contenttype->can_download($content)) {
+    // Add the download content item to the menu.
+    $actionmenu->add_secondary_action(new action_menu_link(
+        new moodle_url($contenttype->get_download_url($content)),
+        new pix_icon('t/download', get_string('download')),
+        get_string('download'),
+        false
+    ));
+}
 if ($contenttype->can_delete($content)) {
     // Add the delete content item to the menu.
     $attributes = [

lang/en/role.php

@@ -153,6 +153,7 @@ $string['confirmunassignno'] = 'Cancel';
 $string['contentbank:access'] = 'Access the content bank';
 $string['contentbank:deleteanycontent'] = 'Delete any content from the content bank';
 $string['contentbank:deleteowncontent'] = 'Delete content from own content bank';
+$string['contentbank:downloadcontent'] = 'Download a content from the content bank';
 $string['contentbank:manageanycontent'] = 'Manage any content from the content bank';
 $string['contentbank:manageowncontent'] = 'Manage content from own content bank';
 $string['contentbank:upload'] = 'Upload new content to the content bank';

lib/db/access.php

@@ -2565,4 +2565,15 @@ $capabilities = array(
             'editingteacher' => CAP_ALLOW,
         )
     ],
+
+    // Allow users to download content.
+    'moodle/contentbank:downloadcontent' => [
+        'captype' => 'read',
+        'contextlevel' => CONTEXT_COURSE,
+        'archetypes' => [
+            'manager' => CAP_ALLOW,
+            'coursecreator' => CAP_ALLOW,
+            'editingteacher' => CAP_ALLOW,
+        ]
+    ],
 );

version.php

@@ -29,7 +29,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$version  = 2020082700.00;              // YYYYMMDD      = weekly release date of this DEV branch.
+$version  = 2020082700.01;              // YYYYMMDD      = weekly release date of this DEV branch.
                                         //         RR    = release increments - 00 in DEV branches.
                                         //           .XX = incremental changes.
 $release  = '3.10dev (Build: 20200827)';// Human-friendly version name