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Developer Documentation

See Release Notes

  • Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
  • Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
  • PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.
<?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/>.

/**
 * This file contains all global functions to do with manipulating portfolios.
 *
 * Everything else that is logically namespaced by class is in its own file
 * in lib/portfolio/ directory.
 *
 * Major Contributors
 *     - Penny Leach <penny@catalyst.net.nz>
 *
 * @package core_portfolio
 * @category portfolio
 * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

// require some of the sublibraries first.
// this is not an exhaustive list, the others are pulled in as they're needed
// so we don't have to always include everything unnecessarily for performance

// very lightweight list of constants. always needed and no further dependencies
require_once($CFG->libdir . '/portfolio/constants.php');
// a couple of exception deinitions. always needed and no further dependencies
require_once($CFG->libdir . '/portfolio/exceptions.php');  // exception classes used by portfolio code
// The base class for the caller classes. We always need this because we're either drawing a button,
// in which case the button needs to know the calling class definition, which requires the base class,
// or we're exporting, in which case we need the caller class anyway.
require_once($CFG->libdir . '/portfolio/caller.php');

// the other dependencies are included on demand:
// libdir/portfolio/formats.php  - the classes for the export formats
// libdir/portfolio/forms.php    - all portfolio form classes (requires formslib)
// libdir/portfolio/plugin.php   - the base class for the export plugins
// libdir/portfolio/exporter.php - the exporter class


/**
 * Use this to add a portfolio button or icon or form to a page.
 *
 * These class methods do not check permissions. the caller must check permissions first.
 * Later, during the export process, the caller class is instantiated and the check_permissions method is called
 * If you are exporting a single file, you should always call set_format_by_file($file)
 * This class can be used like this:
 * <code>
 * $button = new portfolio_add_button();
 * $button->set_callback_options('name_of_caller_class', array('id' => 6), 'yourcomponent'); eg. mod_forum
 * $button->render(PORTFOLIO_ADD_FULL_FORM, get_string('addeverythingtoportfolio', 'yourcomponent'));
 * </code>
 * or like this:
 * <code>
 * $button = new portfolio_add_button(array('callbackclass' => 'name_of_caller_class', 'callbackargs' => array('id' => 6), 'callbackcomponent' => 'yourcomponent')); eg. mod_forum
 * $somehtml .= $button->to_html(PORTFOLIO_ADD_TEXT_LINK);
 * </code>
< *{@link http://docs.moodle.org/dev/Adding_a_Portfolio_Button_to_a_page} for more information
* * @package core_portfolio * @category portfolio * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com} * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class portfolio_add_button { /** @var string the name of the callback functions */ private $callbackclass; /** @var array can be an array of arguments to pass back to the callback functions (passed by reference)*/ private $callbackargs; /** @var string caller file */ private $callbackcomponent; /** @var array array of more specific formats (eg based on mime detection) */ private $formats; /** @var array array of portfolio instances */ private $instances; /** @var stored_file for single-file exports */ private $file; /** @var string for writing specific types of files*/ private $intendedmimetype; /** * Constructor. Either pass the options here or set them using the helper methods. * Generally the code will be clearer if you use the helper methods. * * @param array $options keyed array of options: * key 'callbackclass': name of the caller class (eg forum_portfolio_caller') * key 'callbackargs': the array of callback arguments your caller class wants passed to it in the constructor * key 'callbackcomponent': the file containing the class definition of your caller class. * See set_callback_options for more information on these three. * key 'formats': an array of PORTFOLIO_FORMATS this caller will support * See set_formats or set_format_by_file for more information on this. */ public function __construct($options=null) { global $SESSION, $CFG; if (empty($CFG->enableportfolios)) { debugging('Building portfolio add button while portfolios is disabled. This code can be optimised.', DEBUG_DEVELOPER); } $cache = cache::make('core', 'portfolio_add_button_portfolio_instances'); $instances = $cache->get('instances'); if ($instances === false) { $instances = portfolio_instances(); $cache->set('instances', $instances); } $this->instances = $instances; if (empty($options)) { return true; } $constructoroptions = array('callbackclass', 'callbackargs', 'callbackcomponent'); foreach ((array)$options as $key => $value) { if (!in_array($key, $constructoroptions)) { throw new portfolio_button_exception('invalidbuttonproperty', 'portfolio', $key); } } $this->set_callback_options($options['callbackclass'], $options['callbackargs'], $options['callbackcomponent']); } /** * Function to set the callback options * * @param string $class Name of the class containing the callback functions * activity components should ALWAYS use their name_portfolio_caller * other locations must use something unique * @param array $argarray This can be an array or hash of arguments to pass * back to the callback functions (passed by reference) * these MUST be primatives to be added as hidden form fields. * and the values get cleaned to PARAM_ALPHAEXT or PARAM_FLOAT or PARAM_PATH * @param string $component This is the name of the component in Moodle, eg 'mod_forum' */ public function set_callback_options($class, array $argarray, $component) { global $CFG; // Require the base class first before any other files. require_once($CFG->libdir . '/portfolio/caller.php'); // Include any potential callback files and check for errors. portfolio_include_callback_file($component, $class); // This will throw exceptions but should not actually do anything other than verify callbackargs. $test = new $class($argarray); unset($test); $this->callbackcomponent = $component; $this->callbackclass = $class; $this->callbackargs = $argarray; } /** * Sets the available export formats for this content. * This function will also poll the static function in the caller class * and make sure we're not overriding a format that has nothing to do with mimetypes. * Eg: if you pass IMAGE here but the caller can export LEAP2A it will keep LEAP2A as well. * @see portfolio_most_specific_formats for more information * @see portfolio_format_from_mimetype * * @param array $formats if the calling code knows better than the static method on the calling class (base_supported_formats). * Eg: if it's going to be a single file, or if you know it's HTML, you can pass it here instead. * This is almost always the case so it should be use all the times * portfolio_format_from_mimetype for how to get the appropriate formats to pass here for uploaded files. * or just call set_format_by_file instead */ public function set_formats($formats=null) { if (is_string($formats)) { $formats = array($formats); } if (empty($formats)) { $formats = array(); } if (empty($this->callbackclass)) { throw new portfolio_button_exception('noclassbeforeformats', 'portfolio'); } $callerformats = call_user_func(array($this->callbackclass, 'base_supported_formats')); $this->formats = portfolio_most_specific_formats($formats, $callerformats); } /** * Reset formats to the default, * which is usually what base_supported_formats returns */ public function reset_formats() { $this->set_formats(); } /** * If we already know we have exactly one file, * bypass set_formats and just pass the file * so we can detect the formats by mimetype. * * @param stored_file $file file to set the format from * @param array $extraformats any additional formats other than by mimetype * eg leap2a etc */ public function set_format_by_file(stored_file $file, $extraformats=null) { $this->file = $file; $fileformat = portfolio_format_from_mimetype($file->get_mimetype()); if (is_string($extraformats)) { $extraformats = array($extraformats); } else if (!is_array($extraformats)) { $extraformats = array(); } $this->set_formats(array_merge(array($fileformat), $extraformats)); } /** * Correllary this is use to set_format_by_file, but it is also used when there is no stored_file and * when we're writing out a new type of file (like csv or pdf) * * @param string $extn the file extension we intend to generate * @param array $extraformats any additional formats other than by mimetype * eg leap2a etc */ public function set_format_by_intended_file($extn, $extraformats=null) { $mimetype = mimeinfo('type', 'something. ' . $extn); $fileformat = portfolio_format_from_mimetype($mimetype); $this->intendedmimetype = $fileformat; if (is_string($extraformats)) { $extraformats = array($extraformats); } else if (!is_array($extraformats)) { $extraformats = array(); } $this->set_formats(array_merge(array($fileformat), $extraformats)); } /** * Echo the form/button/icon/text link to the page * * @param int $format format to display the button or form or icon or link. * See constants PORTFOLIO_ADD_XXX for more info. * optional, defaults to PORTFOLIO_ADD_FULL_FORM * @param string $addstr string to use for the button or icon alt text or link text. * this is whole string, not key. optional, defaults to 'Export to portfolio'; */ public function render($format=null, $addstr=null) { echo $this->to_html($format, $addstr); } /** * Returns the form/button/icon/text link as html * * @param int $format format to display the button or form or icon or link. * See constants PORTFOLIO_ADD_XXX for more info. * Optional, defaults to PORTFOLIO_ADD_FULL_FORM * @param string $addstr string to use for the button or icon alt text or link text. * This is whole string, not key. optional, defaults to 'Add to portfolio'; * @return void|string|moodle_url */ public function to_html($format=null, $addstr=null) { global $CFG, $COURSE, $OUTPUT, $USER; if (!$this->is_renderable()) { return; } if (empty($this->callbackclass) || empty($this->callbackcomponent)) { throw new portfolio_button_exception('mustsetcallbackoptions', 'portfolio'); } if (empty($this->formats)) { // use the caller defaults $this->set_formats(); } $url = new moodle_url('/portfolio/add.php'); foreach ($this->callbackargs as $key => $value) { if (!empty($value) && !is_string($value) && !is_numeric($value)) { $a = new stdClass(); $a->key = $key; $a->value = print_r($value, true); debugging(get_string('nonprimative', 'portfolio', $a)); return; } $url->param('ca_' . $key, $value); } $url->param('sesskey', sesskey()); $url->param('callbackcomponent', $this->callbackcomponent); $url->param('callbackclass', $this->callbackclass); $url->param('course', (!empty($COURSE)) ? $COURSE->id : 0); $url->param('callerformats', implode(',', $this->formats)); $mimetype = null; if ($this->file instanceof stored_file) { $mimetype = $this->file->get_mimetype(); } else if ($this->intendedmimetype) { $mimetype = $this->intendedmimetype; } $selectoutput = ''; if (count($this->instances) == 1) { $tmp = array_values($this->instances); $instance = $tmp[0]; $formats = portfolio_supported_formats_intersect($this->formats, $instance->supported_formats()); if (count($formats) == 0) { // bail. no common formats. //debugging(get_string('nocommonformats', 'portfolio', (object)array('location' => $this->callbackclass, 'formats' => implode(',', $this->formats)))); return; } if ($error = portfolio_instance_sanity_check($instance)) { // bail, plugin is misconfigured //debugging(get_string('instancemisconfigured', 'portfolio', get_string($error[$instance->get('id')], 'portfolio_' . $instance->get('plugin')))); return; } if (!$instance->allows_multiple_exports() && $already = portfolio_existing_exports($USER->id, $instance->get('plugin'))) { //debugging(get_string('singleinstancenomultiallowed', 'portfolio')); return; } if ($mimetype&& !$instance->file_mime_check($mimetype)) { // bail, we have a specific file or mimetype and this plugin doesn't support it //debugging(get_string('mimecheckfail', 'portfolio', (object)array('plugin' => $instance->get('plugin'), 'mimetype' => $mimetype))); return; } $url->param('instance', $instance->get('id')); } else { if (!$selectoutput = portfolio_instance_select($this->instances, $this->formats, $this->callbackclass, $mimetype, 'instance', true)) { return; } } // If we just want a moodle_url to redirect to, do it now. if ($format == PORTFOLIO_ADD_MOODLE_URL) { return $url; } // if we just want a url to redirect to, do it now if ($format == PORTFOLIO_ADD_FAKE_URL) { return $url->out(false); } if (empty($addstr)) { $addstr = get_string('addtoportfolio', 'portfolio'); } if (empty($format)) { $format = PORTFOLIO_ADD_FULL_FORM; } $formoutput = '<form method="post" action="' . $CFG->wwwroot . '/portfolio/add.php" id="portfolio-add-button">' . "\n"; $formoutput .= html_writer::input_hidden_params($url); $linkoutput = ''; switch ($format) { case PORTFOLIO_ADD_FULL_FORM: $formoutput .= $selectoutput; $formoutput .= "\n" . '<input type="submit" class="btn btn-secondary" value="' . $addstr .'" />'; $formoutput .= "\n" . '</form>'; break; case PORTFOLIO_ADD_ICON_FORM: $formoutput .= $selectoutput; $formoutput .= "\n" . '<button class="portfolio-add-icon">' . $OUTPUT->pix_icon('t/portfolioadd', $addstr) . '</button>'; $formoutput .= "\n" . '</form>'; break; case PORTFOLIO_ADD_ICON_LINK: $linkoutput = $OUTPUT->action_icon($url, new pix_icon('t/portfolioadd', $addstr, '', array('class' => 'portfolio-add-icon smallicon'))); break; case PORTFOLIO_ADD_TEXT_LINK: $linkoutput = html_writer::link($url, $addstr, array('class' => 'portfolio-add-link', 'title' => $addstr)); break; default: debugging(get_string('invalidaddformat', 'portfolio', $format)); } $output = (in_array($format, array(PORTFOLIO_ADD_FULL_FORM, PORTFOLIO_ADD_ICON_FORM)) ? $formoutput : $linkoutput); return $output; } /** * Perform some internal checks. * These are not errors, just situations * where it's not appropriate to add the button * * @return bool */ private function is_renderable() { global $CFG; if (empty($CFG->enableportfolios)) { return false; } if (defined('PORTFOLIO_INTERNAL')) { // something somewhere has detected a risk of this being called during inside the preparation // eg forum_print_attachments return false; } if (empty($this->instances) || count($this->instances) == 0) { return false; } return true; } /** * Getter for $format property * * @return array */ public function get_formats() { return $this->formats; } /** * Getter for $callbackargs property * * @return array */ public function get_callbackargs() { return $this->callbackargs; } /** * Getter for $callbackcomponent property * * @return string */ public function get_callbackcomponent() { return $this->callbackcomponent; } /** * Getter for $callbackclass property * * @return string */ public function get_callbackclass() { return $this->callbackclass; } } /** * Returns a drop menu with a list of available instances. * * @param array $instances array of portfolio plugin instance objects - the instances to put in the menu * @param array $callerformats array of PORTFOLIO_FORMAT_XXX constants - the formats the caller supports (this is used to filter plugins) * @param string $callbackclass the callback class name - used for debugging only for when there are no common formats * @param string $mimetype if we already know we have exactly one file, or are going to write one, pass it here to do mime filtering. * @param string $selectname the name of the select element. Optional, defaults to instance. * @param bool $return whether to print or return the output. Optional, defaults to print. * @param bool $returnarray if returning, whether to return the HTML or the array of options. Optional, defaults to HTML. * @return void|array|string the html, from <select> to </select> inclusive. */ function portfolio_instance_select($instances, $callerformats, $callbackclass, $mimetype=null, $selectname='instance', $return=false, $returnarray=false) { global $CFG, $USER; if (empty($CFG->enableportfolios)) { return; } $insane = portfolio_instance_sanity_check(); $pinsane = portfolio_plugin_sanity_check(); $count = 0; $selectoutput = "\n" . '<label class="accesshide" for="instanceid">' . get_string('plugin', 'portfolio') . '</label>'; $selectoutput .= "\n" . '<select id="instanceid" name="' . $selectname . '" class="custom-select">' . "\n"; $existingexports = portfolio_existing_exports_by_plugin($USER->id); foreach ($instances as $instance) { $formats = portfolio_supported_formats_intersect($callerformats, $instance->supported_formats()); if (count($formats) == 0) { // bail. no common formats. continue; } if (array_key_exists($instance->get('id'), $insane)) { // bail, plugin is misconfigured //debugging(get_string('instanceismisconfigured', 'portfolio', get_string($insane[$instance->get('id')], 'portfolio_' . $instance->get('plugin')))); continue; } else if (array_key_exists($instance->get('plugin'), $pinsane)) { // bail, plugin is misconfigured //debugging(get_string('pluginismisconfigured', 'portfolio', get_string($pinsane[$instance->get('plugin')], 'portfolio_' . $instance->get('plugin')))); continue; } if (!$instance->allows_multiple_exports() && in_array($instance->get('plugin'), $existingexports)) { // bail, already exporting something with this plugin and it doesn't support multiple exports continue; } if ($mimetype && !$instance->file_mime_check($mimetype)) { //debugging(get_string('mimecheckfail', 'portfolio', (object)array('plugin' => $instance->get('plugin'), 'mimetype' => $mimetype()))); // bail, we have a specific file and this plugin doesn't support it continue; } $count++; $selectoutput .= "\n" . '<option value="' . $instance->get('id') . '">' . $instance->get('name') . '</option>' . "\n"; $options[$instance->get('id')] = $instance->get('name'); } if (empty($count)) { // bail. no common formats. //debugging(get_string('nocommonformats', 'portfolio', (object)array('location' => $callbackclass, 'formats' => implode(',', $callerformats)))); return; } $selectoutput .= "\n" . "</select>\n"; if (!empty($returnarray)) { return $options; } if (!empty($return)) { return $selectoutput; } echo $selectoutput; } /** * Return all portfolio instances * * @todo MDL-15768 - check capabilities here * @param bool $visibleonly Don't include hidden instances. Defaults to true and will be overridden to true if the next parameter is true * @param bool $useronly Check the visibility preferences and permissions of the logged in user. Defaults to true. * @return array of portfolio instances (full objects, not just database records) */ function portfolio_instances($visibleonly=true, $useronly=true) { global $DB, $USER; $values = array(); $sql = 'SELECT * FROM {portfolio_instance}'; if ($visibleonly || $useronly) { $values[] = 1; $sql .= ' WHERE visible = ?'; } if ($useronly) { $sql .= ' AND id NOT IN ( SELECT instance FROM {portfolio_instance_user} WHERE userid = ? AND name = ? AND ' . $DB->sql_compare_text('value') . ' = ? )'; $values = array_merge($values, array($USER->id, 'visible', 0)); } $sql .= ' ORDER BY name'; $instances = array(); foreach ($DB->get_records_sql($sql, $values) as $instance) { $instances[$instance->id] = portfolio_instance($instance->id, $instance); } return $instances; } /** * Return whether there are visible instances in portfolio. * * @return bool true when there are some visible instances. */ function portfolio_has_visible_instances() { global $DB; return $DB->record_exists('portfolio_instance', array('visible' => 1)); } /** * Supported formats currently in use. * Canonical place for a list of all formats * that portfolio plugins and callers * can use for exporting content * * @return array keyed array of all the available export formats (constant => classname) */ function portfolio_supported_formats() { return array( PORTFOLIO_FORMAT_FILE => 'portfolio_format_file', PORTFOLIO_FORMAT_IMAGE => 'portfolio_format_image', PORTFOLIO_FORMAT_RICHHTML => 'portfolio_format_richhtml', PORTFOLIO_FORMAT_PLAINHTML => 'portfolio_format_plainhtml', PORTFOLIO_FORMAT_TEXT => 'portfolio_format_text', PORTFOLIO_FORMAT_VIDEO => 'portfolio_format_video', PORTFOLIO_FORMAT_PDF => 'portfolio_format_pdf', PORTFOLIO_FORMAT_DOCUMENT => 'portfolio_format_document', PORTFOLIO_FORMAT_SPREADSHEET => 'portfolio_format_spreadsheet', PORTFOLIO_FORMAT_PRESENTATION => 'portfolio_format_presentation', /*PORTFOLIO_FORMAT_MBKP, */ // later PORTFOLIO_FORMAT_LEAP2A => 'portfolio_format_leap2a', PORTFOLIO_FORMAT_RICH => 'portfolio_format_rich', ); } /** * Deduce export format from file mimetype * This function returns the revelant portfolio export format * which is used to determine which portfolio plugins can be used * for exporting this content * according to the given mime type * this only works when exporting exactly <b>one</b> file, or generating a new one * (like a pdf or csv export) * * @param string $mimetype (usually $file->get_mimetype()) * @return string the format constant (see PORTFOLIO_FORMAT_XXX constants) */ function portfolio_format_from_mimetype($mimetype) { global $CFG; static $alreadymatched; if (empty($alreadymatched)) { $alreadymatched = array(); } if (array_key_exists($mimetype, $alreadymatched)) { return $alreadymatched[$mimetype]; } $allformats = portfolio_supported_formats(); require_once($CFG->libdir . '/portfolio/formats.php'); foreach ($allformats as $format => $classname) { $supportedmimetypes = call_user_func(array($classname, 'mimetypes')); if (!is_array($supportedmimetypes)) { debugging("one of the portfolio format classes, $classname, said it supported something funny for mimetypes, should have been array..."); debugging(print_r($supportedmimetypes, true)); continue; } if (in_array($mimetype, $supportedmimetypes)) { $alreadymatched[$mimetype] = $format; return $format; } } return PORTFOLIO_FORMAT_FILE; // base case for files... } /** * Intersection of plugin formats and caller formats. * Walks both the caller formats and portfolio plugin formats * and looks for matches (walking the hierarchy as well) * and returns the intersection * * @param array $callerformats formats the caller supports * @param array $pluginformats formats the portfolio plugin supports * @return array */ function portfolio_supported_formats_intersect($callerformats, $pluginformats) { global $CFG; $allformats = portfolio_supported_formats(); $intersection = array(); foreach ($callerformats as $cf) { if (!array_key_exists($cf, $allformats)) { if (!portfolio_format_is_abstract($cf)) { debugging(get_string('invalidformat', 'portfolio', $cf)); } continue; } require_once($CFG->libdir . '/portfolio/formats.php'); $cfobj = new $allformats[$cf](); foreach ($pluginformats as $p => $pf) { if (!array_key_exists($pf, $allformats)) { if (!portfolio_format_is_abstract($pf)) { debugging(get_string('invalidformat', 'portfolio', $pf)); } unset($pluginformats[$p]); // to avoid the same warning over and over continue; } if ($cfobj instanceof $allformats[$pf]) { $intersection[] = $cf; } } } return $intersection; } /** * Tiny helper to figure out whether a portfolio format is abstract * * @param string $format the format to test * @return bool */ function portfolio_format_is_abstract($format) { if (class_exists($format)) { $class = $format; } else if (class_exists('portfolio_format_' . $format)) { $class = 'portfolio_format_' . $format; } else { $allformats = portfolio_supported_formats(); if (array_key_exists($format, $allformats)) { $class = $allformats[$format]; } } if (empty($class)) { return true; // it may as well be, we can't instantiate it :) } $rc = new ReflectionClass($class); return $rc->isAbstract(); } /** * Return the combination of the two arrays of formats with duplicates in terms of specificity removed * and also removes conflicting formats. * Use case: a module is exporting a single file, so the general formats would be FILE and MBKP * while the specific formats would be the specific subclass of FILE based on mime (say IMAGE) * and this function would return IMAGE and MBKP * * @param array $specificformats array of more specific formats (eg based on mime detection) * @param array $generalformats array of more general formats (usually more supported) * @return array merged formats with dups removed */ function portfolio_most_specific_formats($specificformats, $generalformats) { global $CFG; $allformats = portfolio_supported_formats(); if (empty($specificformats)) { return $generalformats; } else if (empty($generalformats)) { return $specificformats; } $removedformats = array(); foreach ($specificformats as $k => $f) { // look for something less specific and remove it, ie outside of the inheritance tree of the current formats. if (!array_key_exists($f, $allformats)) { if (!portfolio_format_is_abstract($f)) { throw new portfolio_button_exception('invalidformat', 'portfolio', $f); } } if (in_array($f, $removedformats)) { // already been removed from the general list //debugging("skipping $f because it was already removed"); unset($specificformats[$k]); } require_once($CFG->libdir . '/portfolio/formats.php'); $fobj = new $allformats[$f]; foreach ($generalformats as $key => $cf) { if (in_array($cf, $removedformats)) { //debugging("skipping $cf because it was already removed"); continue; } $cfclass = $allformats[$cf]; $cfobj = new $allformats[$cf]; if ($fobj instanceof $cfclass && $cfclass != get_class($fobj)) { //debugging("unsetting $key $cf because it's not specific enough ($f is better)"); unset($generalformats[$key]); $removedformats[] = $cf; continue; } // check for conflicts if ($fobj->conflicts($cf)) { //debugging("unsetting $key $cf because it conflicts with $f"); unset($generalformats[$key]); $removedformats[] = $cf; continue; } if ($cfobj->conflicts($f)) { //debugging("unsetting $key $cf because it reverse-conflicts with $f"); $removedformats[] = $cf; unset($generalformats[$key]); continue; } } //debugging('inside loop'); //print_object($generalformats); } //debugging('final formats'); $finalformats = array_unique(array_merge(array_values($specificformats), array_values($generalformats))); //print_object($finalformats); return $finalformats; } /** * Helper function to return a format object from the constant * * @param string $name the constant PORTFOLIO_FORMAT_XXX * @return portfolio_format */ function portfolio_format_object($name) { global $CFG; require_once($CFG->libdir . '/portfolio/formats.php'); $formats = portfolio_supported_formats(); return new $formats[$name]; } /** * Helper function to return an instance of a plugin (with config loaded) * * @param int $instanceid id of instance * @param object $record database row that corresponds to this instance * this is passed to avoid unnecessary lookups * Optional, and the record will be retrieved if null. * @return object of portfolio_plugin_XXX */ function portfolio_instance($instanceid, $record=null) { global $DB, $CFG; if ($record) { $instance = $record; } else { if (!$instance = $DB->get_record('portfolio_instance', array('id' => $instanceid))) { throw new portfolio_exception('invalidinstance', 'portfolio'); } } require_once($CFG->libdir . '/portfolio/plugin.php'); require_once($CFG->dirroot . '/portfolio/'. $instance->plugin . '/lib.php'); $classname = 'portfolio_plugin_' . $instance->plugin; return new $classname($instanceid, $instance); } /** * Helper function to call a static function on a portfolio plugin class. * This will figure out the classname and require the right file and call the function. * You can send a variable number of arguments to this function after the first two * and they will be passed on to the function you wish to call. * * @param string $plugin name of plugin * @param string $function function to call * @return mixed */ function portfolio_static_function($plugin, $function) { global $CFG; $pname = null; if (is_object($plugin) || is_array($plugin)) { $plugin = (object)$plugin; $pname = $plugin->name; } else { $pname = $plugin; } $args = func_get_args(); if (count($args) <= 2) { $args = array(); } else { array_shift($args); array_shift($args); } require_once($CFG->libdir . '/portfolio/plugin.php'); require_once($CFG->dirroot . '/portfolio/' . $plugin . '/lib.php'); return call_user_func_array(array('portfolio_plugin_' . $plugin, $function), $args); } /** * Helper function to check all the plugins for sanity and set any insane ones to invisible. * * @param array $plugins array of supported plugin types * @return array array of insane instances (keys= id, values = reasons (keys for plugin lang) */ function portfolio_plugin_sanity_check($plugins=null) { global $DB; if (is_string($plugins)) { $plugins = array($plugins); } else if (empty($plugins)) { $plugins = core_component::get_plugin_list('portfolio'); $plugins = array_keys($plugins); } $insane = array(); foreach ($plugins as $plugin) { if ($result = portfolio_static_function($plugin, 'plugin_sanity_check')) { $insane[$plugin] = $result; } } if (empty($insane)) { return array(); } list($where, $params) = $DB->get_in_or_equal(array_keys($insane)); $where = ' plugin ' . $where; $DB->set_field_select('portfolio_instance', 'visible', 0, $where, $params); return $insane; } /** * Helper function to check all the instances for sanity and set any insane ones to invisible. * * @param array $instances array of plugin instances * @return array array of insane instances (keys= id, values = reasons (keys for plugin lang) */ function portfolio_instance_sanity_check($instances=null) { global $DB; if (empty($instances)) { $instances = portfolio_instances(false); } else if (!is_array($instances)) { $instances = array($instances); } $insane = array(); foreach ($instances as $instance) { if (is_object($instance) && !($instance instanceof portfolio_plugin_base)) { $instance = portfolio_instance($instance->id, $instance); } else if (is_numeric($instance)) { $instance = portfolio_instance($instance); } if (!($instance instanceof portfolio_plugin_base)) { debugging('something weird passed to portfolio_instance_sanity_check, not subclass or id'); continue; } if ($result = $instance->instance_sanity_check()) { $insane[$instance->get('id')] = $result; } } if (empty($insane)) { return array(); } list ($where, $params) = $DB->get_in_or_equal(array_keys($insane)); $where = ' id ' . $where; $DB->set_field_select('portfolio_instance', 'visible', 0, $where, $params); portfolio_insane_notify_admins($insane, true); return $insane; } /** * Helper function to display a table of plugins (or instances) and reasons for disabling * * @param array $insane array of portfolio plugin * @param array $instances if reporting instances rather than whole plugins, pass the array (key = id, value = object) here * @param bool $return option to deliver the report in html format or print it out directly to the page. * @return void|string of portfolio report in html table format */ function portfolio_report_insane($insane, $instances=false, $return=false) { global $OUTPUT; if (empty($insane)) { return; } static $pluginstr; if (empty($pluginstr)) { $pluginstr = get_string('plugin', 'portfolio'); } if ($instances) { $headerstr = get_string('someinstancesdisabled', 'portfolio'); } else { $headerstr = get_string('somepluginsdisabled', 'portfolio'); } $output = $OUTPUT->notification($headerstr, 'notifyproblem'); $table = new html_table(); $table->head = array($pluginstr, ''); $table->data = array(); foreach ($insane as $plugin => $reason) { if ($instances) { $instance = $instances[$plugin]; $plugin = $instance->get('plugin'); $name = $instance->get('name'); } else { $name = $plugin; } $table->data[] = array($name, get_string($reason, 'portfolio_' . $plugin)); } $output .= html_writer::table($table); $output .= '<br /><br /><br />'; if ($return) { return $output; } echo $output; } /** * Helper function to rethrow a caught portfolio_exception as an export exception. * Used because when a portfolio_export exception is thrown the export is cancelled * throws portfolio_export_exceptiog * * @param portfolio_exporter $exporter current exporter object * @param object $exception exception to rethrow */ function portfolio_export_rethrow_exception($exporter, $exception) { throw new portfolio_export_exception($exporter, $exception->errorcode, $exception->module, $exception->link, $exception->a); } /** * Try and determine expected_time for purely file based exports * or exports that might include large file attachments. * * @param stored_file|array $totest - either an array of stored_file objects or a single stored_file object * @return string PORTFOLIO_TIME_XXX */ function portfolio_expected_time_file($totest) { global $CFG; if ($totest instanceof stored_file) { $totest = array($totest); } $size = 0; foreach ($totest as $file) { if (!($file instanceof stored_file)) { debugging('something weird passed to portfolio_expected_time_file - not stored_file object'); debugging(print_r($file, true)); continue; } $size += $file->get_filesize(); } $fileinfo = portfolio_filesize_info(); $moderate = $high = 0; // avoid warnings foreach (array('moderate', 'high') as $setting) { $settingname = 'portfolio_' . $setting . '_filesize_threshold'; if (empty($CFG->{$settingname}) || !array_key_exists($CFG->{$settingname}, $fileinfo['options'])) { debugging("weird or unset admin value for $settingname, using default instead"); $$setting = $fileinfo[$setting]; } else { $$setting = $CFG->{$settingname}; } } if ($size < $moderate) { return PORTFOLIO_TIME_LOW; } else if ($size < $high) { return PORTFOLIO_TIME_MODERATE; } return PORTFOLIO_TIME_HIGH; } /** * The default filesizes and threshold information for file based transfers. * This shouldn't need to be used outside the admin pages and the portfolio code * * @return array */ function portfolio_filesize_info() { $filesizes = array(); $sizelist = array(10240, 51200, 102400, 512000, 1048576, 2097152, 5242880, 10485760, 20971520, 52428800); foreach ($sizelist as $size) {
< $filesizes[$size] = display_size($size);
> $filesizes[$size] = display_size($size, 0);
} return array( 'options' => $filesizes, 'moderate' => 1048576, 'high' => 5242880, ); } /** * Try and determine expected_time for purely database based exports * or exports that might include large parts of a database. * * @param int $recordcount number of records trying to export * @return string PORTFOLIO_TIME_XXX */ function portfolio_expected_time_db($recordcount) { global $CFG; if (empty($CFG->portfolio_moderate_db_threshold)) { set_config('portfolio_moderate_db_threshold', 20); } if (empty($CFG->portfolio_high_db_threshold)) { set_config('portfolio_high_db_threshold', 50); } if ($recordcount < $CFG->portfolio_moderate_db_threshold) { return PORTFOLIO_TIME_LOW; } else if ($recordcount < $CFG->portfolio_high_db_threshold) { return PORTFOLIO_TIME_MODERATE; } return PORTFOLIO_TIME_HIGH; } /** * Function to send portfolio report to admins * * @param array $insane array of insane plugins * @param array $instances (optional) if reporting instances rather than whole plugins */ function portfolio_insane_notify_admins($insane, $instances=false) { global $CFG; if (defined('ADMIN_EDITING_PORTFOLIO')) { return true; } $admins = get_admins(); if (empty($admins)) { return; } if ($instances) { $instances = portfolio_instances(false, false); } $site = get_site(); $a = new StdClass; $a->sitename = format_string($site->fullname, true, array('context' => context_course::instance(SITEID))); $a->fixurl = "$CFG->wwwroot/$CFG->admin/settings.php?section=manageportfolios"; $a->htmllist = portfolio_report_insane($insane, $instances, true); $a->textlist = ''; foreach ($insane as $k => $reason) { if ($instances) { $a->textlist = $instances[$k]->get('name') . ': ' . $reason . "\n"; } else { $a->textlist = $k . ': ' . $reason . "\n"; } } $subject = get_string('insanesubject', 'portfolio'); $plainbody = get_string('insanebody', 'portfolio', $a); $htmlbody = get_string('insanebodyhtml', 'portfolio', $a); $smallbody = get_string('insanebodysmall', 'portfolio', $a); foreach ($admins as $admin) { $eventdata = new \core\message\message(); $eventdata->courseid = SITEID; $eventdata->modulename = 'portfolio'; $eventdata->component = 'portfolio'; $eventdata->name = 'notices'; $eventdata->userfrom = get_admin(); $eventdata->userto = $admin; $eventdata->subject = $subject; $eventdata->fullmessage = $plainbody; $eventdata->fullmessageformat = FORMAT_PLAIN; $eventdata->fullmessagehtml = $htmlbody; $eventdata->smallmessage = $smallbody; message_send($eventdata); } } /** * Setup page export * * @param moodle_page $PAGE global variable from page object * @param portfolio_caller_base $caller plugin type caller */ function portfolio_export_pagesetup($PAGE, $caller) { // set up the context so that build_navigation works nice $caller->set_context($PAGE); list($extranav, $cm) = $caller->get_navigation(); // and now we know the course for sure and maybe the cm, call require_login with it require_login($PAGE->course, false, $cm);
<
> $PAGE->activityheader->set_attrs([ > 'description' => '', > 'hidecompletion' => true > ]);
foreach ($extranav as $navitem) { $PAGE->navbar->add($navitem['name']); } $PAGE->navbar->add(get_string('exporting', 'portfolio')); } /** * Get export type id * * @param string $type plugin type * @param int $userid the user to check for * @return mixed|bool */ function portfolio_export_type_to_id($type, $userid) { global $DB; $sql = 'SELECT t.id FROM {portfolio_tempdata} t JOIN {portfolio_instance} i ON t.instance = i.id WHERE t.userid = ? AND i.plugin = ?'; return $DB->get_field_sql($sql, array($userid, $type)); } /** * Return a list of current exports for the given user. * This will not go through and call rewaken_object, because it's heavy. * It's really just used to figure out what exports are currently happening. * This is useful for plugins that don't support multiple exports per session * * @param int $userid the user to check for * @param string $type (optional) the portfolio plugin to filter by * @return array */ function portfolio_existing_exports($userid, $type=null) { global $DB; $sql = 'SELECT t.*,t.instance,i.plugin,i.name FROM {portfolio_tempdata} t JOIN {portfolio_instance} i ON t.instance = i.id WHERE t.userid = ? '; $values = array($userid); if ($type) { $sql .= ' AND i.plugin = ?'; $values[] = $type; } return $DB->get_records_sql($sql, $values); } /** * Return an array of existing exports by type for a given user. * This is much more lightweight than existing_exports because it only returns the types, rather than the whole serialised data * so can be used for checking availability of multiple plugins at the same time. * @see existing_exports * * @param int $userid the user to check for * @return array */ function portfolio_existing_exports_by_plugin($userid) { global $DB; $sql = 'SELECT t.id,i.plugin FROM {portfolio_tempdata} t JOIN {portfolio_instance} i ON t.instance = i.id WHERE t.userid = ? '; $values = array($userid); return $DB->get_records_sql_menu($sql, $values); } /** * Return default common options for {@link format_text()} when preparing a content to be exported. * It is important not to apply filters and not to clean the HTML in format_text() * * @return stdClass */ function portfolio_format_text_options() { $options = new stdClass(); $options->para = false; $options->newlines = true; $options->filter = false; $options->noclean = true; $options->overflowdiv = false; return $options; } /** * callback function from {@link portfolio_rewrite_pluginfile_urls} * looks through preg_replace matches and replaces content with whatever the active portfolio export format says * * @param int $contextid module context id * @param string $component module name (eg:mod_assignment) * @param string $filearea normal file_area arguments * @param int $itemid component item id * @param portfolio_format $format exporter format type * @param array $options extra options to pass through to the file_output function in the format (optional) * @param array $matches internal matching * @return object|array|string */ function portfolio_rewrite_pluginfile_url_callback($contextid, $component, $filearea, $itemid, $format, $options, $matches) { $matches = $matches[0]; // No internal matching. // Loads the HTML. $dom = new DomDocument(); if (!$dom->loadHTML($matches)) { return $matches; } // Navigates to the node. $xpath = new DOMXPath($dom); $nodes = $xpath->query('/html/body/child::*'); if (empty($nodes) || count($nodes) > 1) { // Unexpected sequence, none or too many nodes. return $matches; } $dom = $nodes->item(0); $attributes = array(); foreach ($dom->attributes as $attr => $node) { $attributes[$attr] = $node->value; } // now figure out the file $fs = get_file_storage(); $key = 'href'; if (!array_key_exists('href', $attributes) && array_key_exists('src', $attributes)) { $key = 'src'; } if (!array_key_exists($key, $attributes)) { debugging('Couldn\'t find an attribute to use that contains @@PLUGINFILE@@ in portfolio_rewrite_pluginfile'); return $matches; } $filename = substr($attributes[$key], strpos($attributes[$key], '@@PLUGINFILE@@') + strlen('@@PLUGINFILE@@')); $filepath = '/'; if (strpos($filename, '/') !== 0) { $bits = explode('/', $filename); $filename = array_pop($bits); $filepath = implode('/', $bits); } if (!$file = $fs->get_file($contextid, $component, $filearea, $itemid, $filepath, urldecode($filename))) { debugging("Couldn't find a file from the embedded path info context $contextid component $component filearea $filearea itemid $itemid filepath $filepath name $filename"); return $matches; } if (empty($options)) { $options = array(); } $options['attributes'] = $attributes; return $format->file_output($file, $options); } /** * Function to require any potential callback files, throwing exceptions * if an issue occurs. * * @param string $component This is the name of the component in Moodle, eg 'mod_forum' * @param string $class Name of the class containing the callback functions * activity components should ALWAYS use their name_portfolio_caller * other locations must use something unique */ function portfolio_include_callback_file($component, $class = null) { global $CFG; require_once($CFG->libdir . '/adminlib.php'); // It's possible that they are passing a file path rather than passing a component. // We want to try and convert this to a component name, eg. mod_forum. $pos = strrpos($component, '/'); if ($pos !== false) { // Get rid of the first slash (if it exists). $component = ltrim($component, '/'); // Get a list of valid plugin types. $plugintypes = core_component::get_plugin_types(); // Assume it is not valid for now. $isvalid = false; // Go through the plugin types. foreach ($plugintypes as $type => $path) { // Getting the path relative to the dirroot. $path = preg_replace('|^' . preg_quote($CFG->dirroot, '|') . '/|', '', $path); if (strrpos($component, $path) === 0) { // Found the plugin type. $isvalid = true; $plugintype = $type; $pluginpath = $path; } } // Throw exception if not a valid component. if (!$isvalid) { throw new coding_exception('Somehow a non-valid plugin path was passed, could be a hackz0r attempt, exiting.'); } // Remove the file name. $component = trim(substr($component, 0, $pos), '/'); // Replace the path with the type. $component = str_replace($pluginpath, $plugintype, $component); // Ok, replace '/' with '_'. $component = str_replace('/', '_', $component); // Place a debug message saying the third parameter should be changed. debugging('The third parameter sent to the function set_callback_options should be the component name, not a file path, please update this.', DEBUG_DEVELOPER); } // Check that it is a valid component. if (!get_component_version($component)) { throw new portfolio_button_exception('nocallbackcomponent', 'portfolio', '', $component); } // Obtain the component's location. if (!$componentloc = core_component::get_component_directory($component)) { throw new portfolio_button_exception('nocallbackcomponent', 'portfolio', '', $component); } // Check if the component contains the necessary file for the portfolio plugin. // These are locallib.php, portfoliolib.php and portfolio_callback.php. $filefound = false; if (file_exists($componentloc . '/locallib.php')) { $filefound = true; require_once($componentloc . '/locallib.php'); } if (file_exists($componentloc . '/portfoliolib.php')) { $filefound = true; debugging('Please standardise your plugin by renaming your portfolio callback file to locallib.php, or if that file already exists moving the portfolio functionality there.', DEBUG_DEVELOPER); require_once($componentloc . '/portfoliolib.php'); } if (file_exists($componentloc . '/portfolio_callback.php')) { $filefound = true; debugging('Please standardise your plugin by renaming your portfolio callback file to locallib.php, or if that file already exists moving the portfolio functionality there.', DEBUG_DEVELOPER); require_once($componentloc . '/portfolio_callback.php'); } // Ensure that we found a file we can use, if not throw an exception. if (!$filefound) { throw new portfolio_button_exception('nocallbackfile', 'portfolio', '', $component); } if (!is_null($class)) { // If class is specified, check it exists and extends portfolio_caller_base. if (!class_exists($class) || !is_subclass_of($class, 'portfolio_caller_base')) { throw new portfolio_button_exception('nocallbackclass', 'portfolio', '', $class); } } } /** * Go through all the @@PLUGINFILE@@ matches in some text, * extract the file information and pass it back to the portfolio export format * to regenerate the html to output * * @param string $text the text to search through * @param int $contextid normal file_area arguments * @param string $component module name * @param string $filearea normal file_area arguments * @param int $itemid normal file_area arguments * @param portfolio_format $format the portfolio export format * @param array $options additional options to be included in the plugin file url (optional) * @return mixed */ function portfolio_rewrite_pluginfile_urls($text, $contextid, $component, $filearea, $itemid, $format, $options=null) { $patterns = array( '(<(a|A)[^<]*?href="@@PLUGINFILE@@/[^>]*?>.*?</(a|A)>)', '(<(img|IMG)\s[^<]*?src="@@PLUGINFILE@@/[^>]*?/?>)', ); $pattern = '~' . implode('|', $patterns) . '~'; $callback = partial('portfolio_rewrite_pluginfile_url_callback', $contextid, $component, $filearea, $itemid, $format, $options); return preg_replace_callback($pattern, $callback, $text); } // this function has to go last, because the regexp screws up syntax highlighting in some editors
<