File: /home/iestorre/moodleAW/moodleMGGL/mod/data/field/picture/field.class.php
<?php
///////////////////////////////////////////////////////////////////////////
// //
// NOTICE OF COPYRIGHT //
// //
// Moodle - Modular Object-Oriented Dynamic Learning Environment //
// http://moodle.org //
// //
// Copyright (C) 1999-onwards Moodle Pty Ltd http://moodle.com //
// //
// This program 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 2 of the License, or //
// (at your option) any later version. //
// //
// This program 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: //
// //
// http://www.gnu.org/copyleft/gpl.html //
// //
///////////////////////////////////////////////////////////////////////////
class data_field_picture extends data_field_base {
var $type = 'picture';
var $previewwidth = 50;
var $previewheight = 50;
function display_add_field($recordid=0) {
global $CFG, $DB, $OUTPUT, $USER, $PAGE;
$file = false;
$content = false;
$displayname = '';
$alttext = '';
$itemid = null;
$fs = get_file_storage();
if ($recordid) {
if ($content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
file_prepare_draft_area($itemid, $this->context->id, 'mod_data', 'content', $content->id);
if (!empty($content->content)) {
if ($file = $fs->get_file($this->context->id, 'mod_data', 'content', $content->id, '/', $content->content)) {
$usercontext = context_user::instance($USER->id);
if (!$files = $fs->get_area_files($usercontext->id, 'user', 'draft', $itemid, 'id DESC', false)) {
return false;
}
if ($thumbfile = $fs->get_file($usercontext->id, 'user', 'draft', $itemid, '/', 'thumb_'.$content->content)) {
$thumbfile->delete();
}
if (empty($content->content1)) {
// Print icon if file already exists
$src = moodle_url::make_draftfile_url($itemid, '/', $file->get_filename());
$displayname = $OUTPUT->pix_icon(file_file_icon($file), get_mimetype_description($file), 'moodle', array('class' => 'icon')). '<a href="'.$src.'" >'.s($file->get_filename()).'</a>';
} else {
$displayname = get_string('nofilesattached', 'repository');
}
}
}
$alttext = $content->content1;
}
} else {
$itemid = file_get_unused_draft_itemid();
}
$str = '<div title="'.s($this->field->description).'">';
$str .= '<fieldset><legend><span class="accesshide">'.$this->field->name.'</span></legend>';
$str .= '<noscript>';
if ($file) {
$src = file_encode_url($CFG->wwwroot.'/pluginfile.php/', $this->context->id.'/mod_data/content/'.$content->id.'/'.$file->get_filename());
$str .= '<img width="'.s($this->previewwidth).'" height="'.s($this->previewheight).'" src="'.$src.'" alt="" />';
}
$str .= '</noscript>';
$options = new stdClass();
$options->maxbytes = $this->field->param3;
$options->maxfiles = 1; // Only one picture permitted.
$options->itemid = $itemid;
$options->accepted_types = array('web_image');
$options->return_types = FILE_INTERNAL;
$options->context = $PAGE->context;
if (!empty($file)) {
$options->filename = $file->get_filename();
$options->filepath = '/';
}
$fm = new form_filemanager($options);
// Print out file manager.
$output = $PAGE->get_renderer('core', 'files');
$str .= $output->render($fm);
$str .= '<div class="mdl-left">';
$str .= '<input type="hidden" name="field_'.$this->field->id.'_file" value="'.$itemid.'" />';
$str .= '<label for="field_'.$this->field->id.'_alttext">'.get_string('alttext','data') .'</label> <input type="text" name="field_'
.$this->field->id.'_alttext" id="field_'.$this->field->id.'_alttext" value="'.s($alttext).'" />';
$str .= '</div>';
$str .= '</fieldset>';
$str .= '</div>';
return $str;
}
// TODO delete this function and instead subclass data_field_file - see MDL-16493
function get_file($recordid, $content=null) {
global $DB;
if (empty($content)) {
if (!$content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
return null;
}
}
$fs = get_file_storage();
if (!$file = $fs->get_file($this->context->id, 'mod_data', 'content', $content->id, '/', $content->content)) {
return null;
}
return $file;
}
function display_search_field($value = '') {
return '<label class="accesshide" for="f_'.$this->field->id.'">' . get_string('fieldname', 'data') . '</label>' .
'<input type="text" size="16" id="f_'.$this->field->id.'" name="f_'.$this->field->id.'" value="'.$value.'" />';
}
function parse_search_field() {
return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS);
}
function generate_sql($tablealias, $value) {
global $DB;
static $i=0;
$i++;
$name = "df_picture_$i";
return array(" ({$tablealias}.fieldid = {$this->field->id} AND ".$DB->sql_like("{$tablealias}.content", ":$name", false).") ", array($name=>"%$value%"));
}
function display_browse_field($recordid, $template) {
global $CFG, $DB;
if (!$content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
return false;
}
if (empty($content->content)) {
return '';
}
$alt = $content->content1;
$title = $alt;
if ($template == 'listtemplate') {
$src = file_encode_url($CFG->wwwroot.'/pluginfile.php', '/'.$this->context->id.'/mod_data/content/'.$content->id.'/'.'thumb_'.$content->content);
// no need to add width/height, because the thumb is resized properly
$str = '<a href="view.php?d='.$this->field->dataid.'&rid='.$recordid.'"><img src="'.$src.'" alt="'.s($alt).'" title="'.s($title).'" class="list_picture"/></a>';
} else {
$src = file_encode_url($CFG->wwwroot.'/pluginfile.php', '/'.$this->context->id.'/mod_data/content/'.$content->id.'/'.$content->content);
$width = $this->field->param1 ? ' width="'.s($this->field->param1).'" ':' ';
$height = $this->field->param2 ? ' height="'.s($this->field->param2).'" ':' ';
$str = '<a href="'.$src.'"><img '.$width.$height.' src="'.$src.'" alt="'.s($alt).'" title="'.s($title).'" class="list_picture"/></a>';
}
return $str;
}
function update_field() {
global $DB, $OUTPUT;
// Get the old field data so that we can check whether the thumbnail dimensions have changed
$oldfield = $DB->get_record('data_fields', array('id'=>$this->field->id));
$DB->update_record('data_fields', $this->field);
// Have the thumbnail dimensions changed?
if ($oldfield && ($oldfield->param4 != $this->field->param4 || $oldfield->param5 != $this->field->param5)) {
// Check through all existing records and update the thumbnail
if ($contents = $DB->get_records('data_content', array('fieldid'=>$this->field->id))) {
$fs = get_file_storage();
if (count($contents) > 20) {
echo $OUTPUT->notification(get_string('resizingimages', 'data'), 'notifysuccess');
echo "\n\n";
// To make sure that ob_flush() has the desired effect
ob_flush();
}
foreach ($contents as $content) {
if (!$file = $fs->get_file($this->context->id, 'mod_data', 'content', $content->id, '/', $content->content)) {
continue;
}
if ($thumbfile = $fs->get_file($this->context->id, 'mod_data', 'content', $content->id, '/', 'thumb_'.$content->content)) {
$thumbfile->delete();
}
@set_time_limit(300);
// Might be slow!
$this->update_thumbnail($content, $file);
}
}
}
return true;
}
function update_content($recordid, $value, $name='') {
global $CFG, $DB, $USER;
if (!$content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
// Quickly make one now!
$content = new stdClass();
$content->fieldid = $this->field->id;
$content->recordid = $recordid;
$id = $DB->insert_record('data_content', $content);
$content = $DB->get_record('data_content', array('id'=>$id));
}
$names = explode('_', $name);
switch ($names[2]) {
case 'file':
$fs = get_file_storage();
$fs->delete_area_files($this->context->id, 'mod_data', 'content', $content->id);
$usercontext = context_user::instance($USER->id);
$files = $fs->get_area_files($usercontext->id, 'user', 'draft', $value);
if (count($files)<2) {
// no file
} else {
$count = 0;
foreach ($files as $draftfile) {
$file_record = array('contextid'=>$this->context->id, 'component'=>'mod_data', 'filearea'=>'content', 'itemid'=>$content->id, 'filepath'=>'/');
if (!$draftfile->is_directory()) {
$file_record['filename'] = $draftfile->get_filename();
$content->content = $draftfile->get_filename();
$file = $fs->create_file_from_storedfile($file_record, $draftfile);
// If the file is not a valid image, redirect back to the upload form.
if ($file->get_imageinfo() === false) {
$url = new moodle_url('/mod/data/edit.php', array('d' => $this->field->dataid));
redirect($url, get_string('invalidfiletype', 'error', $file->get_filename()));
}
$DB->update_record('data_content', $content);
$this->update_thumbnail($content, $file);
if ($count > 0) {
break;
} else {
$count++;
}
}
}
}
break;
case 'alttext':
// only changing alt tag
$content->content1 = clean_param($value, PARAM_NOTAGS);
$DB->update_record('data_content', $content);
break;
default:
break;
}
}
function update_thumbnail($content, $file) {
// (Re)generate thumbnail image according to the dimensions specified in the field settings.
// If thumbnail width and height are BOTH not specified then no thumbnail is generated, and
// additionally an attempted delete of the existing thumbnail takes place.
$fs = get_file_storage();
$file_record = array('contextid'=>$file->get_contextid(), 'component'=>$file->get_component(), 'filearea'=>$file->get_filearea(),
'itemid'=>$file->get_itemid(), 'filepath'=>$file->get_filepath(),
'filename'=>'thumb_'.$file->get_filename(), 'userid'=>$file->get_userid());
try {
// this may fail for various reasons
$fs->convert_image($file_record, $file, $this->field->param4, $this->field->param5, true);
return true;
} catch (Exception $e) {
debugging($e->getMessage());
return false;
}
}
function text_export_supported() {
return false;
}
function file_ok($path) {
return true;
}
}