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tablelib.php
<?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/>.
/**
* @package core
* @subpackage lib
* @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();
/**#@+
* These constants relate to the table's handling of URL parameters.
*/
define('TABLE_VAR_SORT', 1);
define('TABLE_VAR_HIDE', 2);
define('TABLE_VAR_SHOW', 3);
define('TABLE_VAR_IFIRST', 4);
define('TABLE_VAR_ILAST', 5);
define('TABLE_VAR_PAGE', 6);
define('TABLE_VAR_RESET', 7);
define('TABLE_VAR_DIR', 8);
/**#@-*/
/**#@+
* Constants that indicate whether the paging bar for the table
* appears above or below the table.
*/
define('TABLE_P_TOP', 1);
define('TABLE_P_BOTTOM', 2);
/**#@-*/
/**
* @package moodlecore
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class flexible_table {
var $uniqueid = NULL;
var $attributes = array();
var $headers = array();
/**
* @var string A column which should be considered as a header column.
*/
protected $headercolumn = null;
/**
* @var string For create header with help icon.
*/
private $helpforheaders = array();
var $columns = array();
var $column_style = array();
var $column_class = array();
var $column_suppress = array();
var $column_nosort = array('userpic');
private $column_textsort = array();
/** @var boolean Stores if setup has already been called on this flixible table. */
var $setup = false;
var $baseurl = NULL;
var $request = array();
/**
* @var bool Whether or not to store table properties in the user_preferences table.
*/
private $persistent = false;
var $is_collapsible = false;
var $is_sortable = false;
/**
* @var string The field name to sort by.
*/
protected $sortby;
/**
* @var string $sortorder The direction for sorting.
*/
protected $sortorder;
var $use_pages = false;
var $use_initials = false;
var $maxsortkeys = 2;
var $pagesize = 30;
var $currpage = 0;
var $totalrows = 0;
var $currentrow = 0;
var $sort_default_column = NULL;
var $sort_default_order = SORT_ASC;
/**
* Array of positions in which to display download controls.
*/
var $showdownloadbuttonsat= array(TABLE_P_TOP);
/**
* @var string Key of field returned by db query that is the id field of the
* user table or equivalent.
*/
public $useridfield = 'id';
/**
* @var string which download plugin to use. Default '' means none - print
* html table with paging. Property set by is_downloading which typically
* passes in cleaned data from $
*/
var $download = '';
/**
* @var bool whether data is downloadable from table. Determines whether
* to display download buttons. Set by method downloadable().
*/
var $downloadable = false;
/**
* @var bool Has start output been called yet?
*/
var $started_output = false;
var $exportclass = null;
/**
* @var array For storing user-customised table properties in the user_preferences db table.
*/
private $prefs = array();
/** @var $sheettitle */
protected $sheettitle;
/** @var $filename */
protected $filename;
/**
* Constructor
* @param string $uniqueid all tables have to have a unique id, this is used
* as a key when storing table properties like sort order in the session.
*/
function __construct($uniqueid) {
$this->uniqueid = $uniqueid;
$this->request = array(
TABLE_VAR_SORT => 'tsort',
TABLE_VAR_HIDE => 'thide',
TABLE_VAR_SHOW => 'tshow',
TABLE_VAR_IFIRST => 'tifirst',
TABLE_VAR_ILAST => 'tilast',
TABLE_VAR_PAGE => 'page',
TABLE_VAR_RESET => 'treset',
TABLE_VAR_DIR => 'tdir',
);
}
/**
* Call this to pass the download type. Use :
* $download = optional_param('download', '', PARAM_ALPHA);
* To get the download type. We assume that if you call this function with
* params that this table's data is downloadable, so we call is_downloadable
* for you (even if the param is '', which means no download this time.
* Also you can call this method with no params to get the current set
* download type.
* @param string $download dataformat type. One of csv, xhtml, ods, etc
* @param string $filename filename for downloads without file extension.
* @param string $sheettitle title for downloaded data.
* @return string download dataformat type. One of csv, xhtml, ods, etc
*/
function is_downloading($download = null, $filename='', $sheettitle='') {
if ($download!==null) {
$this->sheettitle = $sheettitle;
$this->is_downloadable(true);
$this->download = $download;
$this->filename = clean_filename($filename);
$this->export_class_instance();
}
return $this->download;
}
/**
* Get, and optionally set, the export class.
* @param $exportclass (optional) if passed, set the table to use this export class.
* @return table_default_export_format_parent the export class in use (after any set).
*/
function export_class_instance($exportclass = null) {
if (!is_null($exportclass)) {
$this->started_output = true;
$this->exportclass = $exportclass;
$this->exportclass->table = $this;
} else if (is_null($this->exportclass) && !empty($this->download)) {
$this->exportclass = new table_dataformat_export_format($this, $this->download);
if (!$this->exportclass->document_started()) {
$this->exportclass->start_document($this->filename, $this->sheettitle);
}
}
return $this->exportclass;
}
/**
* Probably don't need to call this directly. Calling is_downloading with a
* param automatically sets table as downloadable.
*
* @param bool $downloadable optional param to set whether data from
* table is downloadable. If ommitted this function can be used to get
* current state of table.
* @return bool whether table data is set to be downloadable.
*/
function is_downloadable($downloadable = null) {
if ($downloadable !== null) {
$this->downloadable = $downloadable;
}
return $this->downloadable;
}
/**
* Call with boolean true to store table layout changes in the user_preferences table.
* Note: user_preferences.value has a maximum length of 1333 characters.
* Call with no parameter to get current state of table persistence.
*
* @param bool $persistent Optional parameter to set table layout persistence.
* @return bool Whether or not the table layout preferences will persist.
*/
public function is_persistent($persistent = null) {
if ($persistent == true) {
$this->persistent = true;
}
return $this->persistent;
}
/**
* Where to show download buttons.
* @param array $showat array of postions in which to show download buttons.
* Containing TABLE_P_TOP and/or TABLE_P_BOTTOM
*/
function show_download_buttons_at($showat) {
$this->showdownloadbuttonsat = $showat;
}
/**
* Sets the is_sortable variable to the given boolean, sort_default_column to
* the given string, and the sort_default_order to the given integer.
* @param bool $bool
* @param string $defaultcolumn
* @param int $defaultorder
* @return void
*/
function sortable($bool, $defaultcolumn = NULL, $defaultorder = SORT_ASC) {
$this->is_sortable = $bool;
$this->sort_default_column = $defaultcolumn;
$this->sort_default_order = $defaultorder;
}
/**
* Use text sorting functions for this column (required for text columns with Oracle).
* Be warned that you cannot use this with column aliases. You can only do this
* with real columns. See MDL-40481 for an example.
* @param string column name
*/
function text_sorting($column) {
$this->column_textsort[] = $column;
}
/**
* Do not sort using this column
* @param string column name
*/
function no_sorting($column) {
$this->column_nosort[] = $column;
}
/**
* Is the column sortable?
* @param string column name, null means table
* @return bool
*/
function is_sortable($column = null) {
if (empty($column)) {
return $this->is_sortable;
}
if (!$this->is_sortable) {
return false;
}
return !in_array($column, $this->column_nosort);
}
/**
* Sets the is_collapsible variable to the given boolean.
* @param bool $bool
* @return void
*/
function collapsible($bool) {
$this->is_collapsible = $bool;
}
/**
* Sets the use_pages variable to the given boolean.
* @param bool $bool
* @return void
*/
function pageable($bool) {
$this->use_pages = $bool;
}
/**
* Sets the use_initials variable to the given boolean.
* @param bool $bool
* @return void
*/
function initialbars($bool) {
$this->use_initials = $bool;
}
/**
* Sets the pagesize variable to the given integer, the totalrows variable
* to the given integer, and the use_pages variable to true.
* @param int $perpage
* @param int $total
* @return void
*/
function pagesize($perpage, $total) {
$this->pagesize = $perpage;
$this->totalrows = $total;
$this->use_pages = true;
}
/**
* Assigns each given variable in the array to the corresponding index
* in the request class variable.
* @param array $variables
* @return void
*/
function set_control_variables($variables) {
foreach ($variables as $what => $variable) {
if (isset($this->request[$what])) {
$this->request[$what] = $variable;
}
}
}
/**
* Gives the given $value to the $attribute index of $this->attributes.
* @param string $attribute
* @param mixed $value
* @return void
*/
function set_attribute($attribute, $value) {
$this->attributes[$attribute] = $value;
}
/**
* What this method does is set the column so that if the same data appears in
* consecutive rows, then it is not repeated.
*
* For example, in the quiz overview report, the fullname column is set to be suppressed, so
* that when one student has made multiple attempts, their name is only printed in the row
* for their first attempt.
* @param int $column the index of a column.
*/
function column_suppress($column) {
if (isset($this->column_suppress[$column])) {
$this->column_suppress[$column] = true;
}
}
/**
* Sets the given $column index to the given $classname in $this->column_class.
* @param int $column
* @param string $classname
* @return void
*/
function column_class($column, $classname) {
if (isset($this->column_class[$column])) {
$this->column_class[$column] = ' '.$classname; // This space needed so that classnames don't run together in the HTML
}
}
/**
* Sets the given $column index and $property index to the given $value in $this->column_style.
* @param int $column
* @param string $property
* @param mixed $value
* @return void
*/
function column_style($column, $property, $value) {
if (isset($this->column_style[$column])) {
$this->column_style[$column][$property] = $value;
}
}
/**
* Sets all columns' $propertys to the given $value in $this->column_style.
* @param int $property
* @param string $value
* @return void
*/
function column_style_all($property, $value) {
foreach (array_keys($this->columns) as $column) {
$this->column_style[$column][$property] = $value;
}
}
/**
* Sets $this->baseurl.
* @param moodle_url|string $url the url with params needed to call up this page
*/
function define_baseurl($url) {
$this->baseurl = new moodle_url($url);
}
/**
* @param array $columns an array of identifying names for columns. If
* columns are sorted then column names must correspond to a field in sql.
*/
function define_columns($columns) {
$this->columns = array();
$this->column_style = array();
$this->column_class = array();
$colnum = 0;
foreach ($columns as $column) {
$this->columns[$column] = $colnum++;
$this->column_style[$column] = array();
$this->column_class[$column] = '';
$this->column_suppress[$column] = false;
}
}
/**
* @param array $headers numerical keyed array of displayed string titles
* for each column.
*/
function define_headers($headers) {
$this->headers = $headers;
}
/**
* Mark a specific column as being a table header using the column name defined in define_columns.
*
* Note: Only one column can be a header, and it will be rendered using a th tag.
*
* @param string $column
*/
public function define_header_column(string $column) {
$this->headercolumn = $column;
}
/**
* Defines a help icon for the header
*
* Always use this function if you need to create header with sorting and help icon.
*
* @param renderable[] $helpicons An array of renderable objects to be used as help icons
*/
public function define_help_for_headers($helpicons) {
$this->helpforheaders = $helpicons;
}
/**
* Must be called after table is defined. Use methods above first. Cannot
* use functions below till after calling this method.
* @return type?
*/
function setup() {
global $SESSION;
if (empty($this->columns) || empty($this->uniqueid)) {
return false;
}
// Load any existing user preferences.
if ($this->persistent) {
$this->prefs = json_decode(get_user_preferences('flextable_' . $this->uniqueid), true);
$oldprefs = $this->prefs;
} else if (isset($SESSION->flextable[$this->uniqueid])) {
$this->prefs = $SESSION->flextable[$this->uniqueid];
$oldprefs = $this->prefs;
}
// Set up default preferences if needed.
if (!$this->prefs or optional_param($this->request[TABLE_VAR_RESET], false, PARAM_BOOL)) {
$this->prefs = array(
'collapse' => array(),
'sortby' => array(),
'i_first' => '',
'i_last' => '',
'textsort' => $this->column_textsort,
);
}
if (!isset($oldprefs)) {
$oldprefs = $this->prefs;
}
if (($showcol = optional_param($this->request[TABLE_VAR_SHOW], '', PARAM_ALPHANUMEXT)) &&
isset($this->columns[$showcol])) {
$this->prefs['collapse'][$showcol] = false;
} else if (($hidecol = optional_param($this->request[TABLE_VAR_HIDE], '', PARAM_ALPHANUMEXT)) &&
isset($this->columns[$hidecol])) {
$this->prefs['collapse'][$hidecol] = true;
if (array_key_exists($hidecol, $this->prefs['sortby'])) {
unset($this->prefs['sortby'][$hidecol]);
}
}
// Now, update the column attributes for collapsed columns
foreach (array_keys($this->columns) as $column) {
if (!empty($this->prefs['collapse'][$column])) {
$this->column_style[$column]['width'] = '10px';
}
}
$this->set_sorting_preferences();
$ilast = optional_param($this->request[TABLE_VAR_ILAST], null, PARAM_RAW);
if (!is_null($ilast) && ($ilast ==='' || strpos(get_string('alphabet', 'langconfig'), $ilast) !== false)) {
$this->prefs['i_last'] = $ilast;
}
$ifirst = optional_param($this->request[TABLE_VAR_IFIRST], null, PARAM_RAW);
if (!is_null($ifirst) && ($ifirst === '' || strpos(get_string('alphabet', 'langconfig'), $ifirst) !== false)) {
$this->prefs['i_first'] = $ifirst;
}
// Save user preferences if they have changed.
if ($this->prefs != $oldprefs) {
if ($this->persistent) {
set_user_preference('flextable_' . $this->uniqueid, json_encode($this->prefs));
} else {
$SESSION->flextable[$this->uniqueid] = $this->prefs;
}
}
unset($oldprefs);
if (empty($this->baseurl)) {
debugging('You should set baseurl when using flexible_table.');
global $PAGE;
$this->baseurl = $PAGE->url;
}
$this->currpage = optional_param($this->request[TABLE_VAR_PAGE], 0, PARAM_INT);
$this->setup = true;
// Always introduce the "flexible" class for the table if not specified
if (empty($this->attributes)) {
$this->attributes['class'] = 'flexible table table-striped table-hover';
} else if (!isset($this->attributes['class'])) {
$this->attributes['class'] = 'flexible table table-striped table-hover';
} else if (!in_array('flexible', explode(' ', $this->attributes['class']))) {
$this->attributes['class'] = trim('flexible table table-striped table-hover ' . $this->attributes['class']);
}
}
/**
* Get the order by clause from the session or user preferences, for the table with id $uniqueid.
* @param string $uniqueid the identifier for a table.
* @return SQL fragment that can be used in an ORDER BY clause.
*/
public static function get_sort_for_table($uniqueid) {
global $SESSION;
if (isset($SESSION->flextable[$uniqueid])) {
$prefs = $SESSION->flextable[$uniqueid];
} else if (!$prefs = json_decode(get_user_preferences('flextable_' . $uniqueid), true)) {
return '';
}
if (empty($prefs['sortby'])) {
return '';
}
if (empty($prefs['textsort'])) {
$prefs['textsort'] = array();
}
return self::construct_order_by($prefs['sortby'], $prefs['textsort']);
}
/**
* Prepare an an order by clause from the list of columns to be sorted.
* @param array $cols column name => SORT_ASC or SORT_DESC
* @return SQL fragment that can be used in an ORDER BY clause.
*/
public static function construct_order_by($cols, $textsortcols=array()) {
global $DB;
$bits = array();
foreach ($cols as $column => $order) {
if (in_array($column, $textsortcols)) {
$column = $DB->sql_order_by_text($column);
}
if ($order == SORT_ASC) {
$bits[] = $column . ' ASC';
} else {
$bits[] = $column . ' DESC';
}
}
return implode(', ', $bits);
}
/**
* @return SQL fragment that can be used in an ORDER BY clause.
*/
public function get_sql_sort() {
return self::construct_order_by($this->get_sort_columns(), $this->column_textsort);
}
/**
* Get the columns to sort by, in the form required by {@link construct_order_by()}.
* @return array column name => SORT_... constant.
*/
public function get_sort_columns() {
if (!$this->setup) {
throw new coding_exception('Cannot call get_sort_columns until you have called setup.');
}
if (empty($this->prefs['sortby'])) {
return array();
}
foreach ($this->prefs['sortby'] as $column => $notused) {
if (isset($this->columns[$column])) {
continue; // This column is OK.
}
if (in_array($column, get_all_user_name_fields()) &&
isset($this->columns['fullname'])) {
continue; // This column is OK.
}
// This column is not OK.
unset($this->prefs['sortby'][$column]);
}
return $this->prefs['sortby'];
}
/**
* @return int the offset for LIMIT clause of SQL
*/
function get_page_start() {
if (!$this->use_pages) {
return '';
}
return $this->currpage * $this->pagesize;
}
/**
* @return int the pagesize for LIMIT clause of SQL
*/
function get_page_size() {
if (!$this->use_pages) {
return '';
}
return $this->pagesize;
}
/**
* @return string sql to add to where statement.
*/
function get_sql_where() {
global $DB;
$conditions = array();
$params = array();
if (isset($this->columns['fullname'])) {
static $i = 0;
$i++;
if (!empty($this->prefs['i_first'])) {
$conditions[] = $DB->sql_like('firstname', ':ifirstc'.$i, false, false);
$params['ifirstc'.$i] = $this->prefs['i_first'].'%';
}
if (!empty($this->prefs['i_last'])) {
$conditions[] = $DB->sql_like('lastname', ':ilastc'.$i, false, false);
$params['ilastc'.$i] = $this->prefs['i_last'].'%';
}
}
return array(implode(" AND ", $conditions), $params);
}
/**
* Add a row of data to the table. This function takes an array or object with
* column names as keys or property names.
*
* It ignores any elements with keys that are not defined as columns. It
* puts in empty strings into the row when there is no element in the passed
* array corresponding to a column in the table. It puts the row elements in
* the proper order (internally row table data is stored by in arrays with
* a numerical index corresponding to the column number).
*
* @param object|array $rowwithkeys array keys or object property names are column names,
* as defined in call to define_columns.
* @param string $classname CSS class name to add to this row's tr tag.
*/
function add_data_keyed($rowwithkeys, $classname = '') {
$this->add_data($this->get_row_from_keyed($rowwithkeys), $classname);
}
/**
* Add a number of rows to the table at once. And optionally finish output after they have been added.
*
* @param (object|array|null)[] $rowstoadd Array of rows to add to table, a null value in array adds a separator row. Or a
* object or array is added to table. We expect properties for the row array as would be
* passed to add_data_keyed.
* @param bool $finish
*/
public function format_and_add_array_of_rows($rowstoadd, $finish = true) {
foreach ($rowstoadd as $row) {
if (is_null($row)) {
$this->add_separator();
} else {
$this->add_data_keyed($this->format_row($row));
}
}
if ($finish) {
$this->finish_output(!$this->is_downloading());
}
}
/**
* Add a seperator line to table.
*/
function add_separator() {
if (!$this->setup) {
return false;
}
$this->add_data(NULL);
}
/**
* This method actually directly echoes the row passed to it now or adds it
* to the download. If this is the first row and start_output has not
* already been called this method also calls start_output to open the table
* or send headers for the downloaded.
* Can be used as before. print_html now calls finish_html to close table.
*
* @param array $row a numerically keyed row of data to add to the table.
* @param string $classname CSS class name to add to this row's tr tag.
* @return bool success.
*/
function add_data($row, $classname = '') {
if (!$this->setup) {
return false;
}
if (!$this->started_output) {
$this->start_output();
}
if ($this->exportclass!==null) {
if ($row === null) {
$this->exportclass->add_seperator();
} else {
$this->exportclass->add_data($row);
}
} else {
$this->print_row($row, $classname);
}
return true;
}
/**
* You should call this to finish outputting the table data after adding
* data to the table with add_data or add_data_keyed.
*
*/
function finish_output($closeexportclassdoc = true) {
if ($this->exportclass!==null) {
$this->exportclass->finish_table();
if ($closeexportclassdoc) {
$this->exportclass->finish_document();
}
} else {
$this->finish_html();
}
}
/**
* Hook that can be overridden in child classes to wrap a table in a form
* for example. Called only when there is data to display and not
* downloading.
*/
function wrap_html_start() {
}
/**
* Hook that can be overridden in child classes to wrap a table in a form
* for example. Called only when there is data to display and not
* downloading.
*/
function wrap_html_finish() {
}
/**
* Call appropriate methods on this table class to perform any processing on values before displaying in table.
* Takes raw data from the database and process it into human readable format, perhaps also adding html linking when
* displaying table as html, adding a div wrap, etc.
*
* See for example col_fullname below which will be called for a column whose name is 'fullname'.
*
* @param array|object $row row of data from db used to make one row of the table.
* @return array one row for the table, added using add_data_keyed method.
*/
function format_row($row) {
if (is_array($row)) {
$row = (object)$row;
}
$formattedrow = array();
foreach (array_keys($this->columns) as $column) {
$colmethodname = 'col_'.$column;
if (method_exists($this, $colmethodname)) {
$formattedcolumn = $this->$colmethodname($row);
} else {
$formattedcolumn = $this->other_cols($column, $row);
if ($formattedcolumn===NULL) {
$formattedcolumn = $row->$column;
}
}
$formattedrow[$column] = $formattedcolumn;
}
return $formattedrow;
}
/**
* Fullname is treated as a special columname in tablelib and should always
* be treated the same as the fullname of a user.
* @uses $this->useridfield if the userid field is not expected to be id
* then you need to override $this->useridfield to point at the correct
* field for the user id.
*
* @param object $row the data from the db containing all fields from the
* users table necessary to construct the full name of the user in
* current language.
* @return string contents of cell in column 'fullname', for this row.
*/
function col_fullname($row) {
global $PAGE, $COURSE;
$name = fullname($row, has_capability('moodle/site:viewfullnames', $PAGE->context));
if ($this->download) {
return $name;
}
$userid = $row->{$this->useridfield};
if ($COURSE->id == SITEID) {
$profileurl = new moodle_url('/user/profile.php', array('id' => $userid));
} else {
$profileurl = new moodle_url('/user/view.php',
array('id' => $userid, 'course' => $COURSE->id));
}
return html_writer::link($profileurl, $name);
}
/**
* You can override this method in a child class. See the description of
* build_table which calls this method.
*/
function other_cols($column, $row) {
return NULL;
}
/**
* Used from col_* functions when text is to be displayed. Does the
* right thing - either converts text to html or strips any html tags
* depending on if we are downloading and what is the download type. Params
* are the same as format_text function in weblib.php but some default
* options are changed.
*/
function format_text($text, $format=FORMAT_MOODLE, $options=NULL, $courseid=NULL) {
if (!$this->is_downloading()) {
if (is_null($options)) {
$options = new stdClass;
}
//some sensible defaults
if (!isset($options->para)) {
$options->para = false;
}
if (!isset($options->newlines)) {
$options->newlines = false;
}
if (!isset($options->smiley)) {
$options->smiley = false;
}
if (!isset($options->filter)) {
$options->filter = false;
}
return format_text($text, $format, $options);
} else {
$eci = $this->export_class_instance();
return $eci->format_text($text, $format, $options, $courseid);
}
}
/**
* This method is deprecated although the old api is still supported.
* @deprecated 1.9.2 - Jun 2, 2008
*/
function print_html() {
if (!$this->setup) {
return false;
}
$this->finish_html();
}
/**
* This function is not part of the public api.
* @return string initial of first name we are currently filtering by
*/
function get_initial_first() {
if (!$this->use_initials) {
return NULL;
}
return $this->prefs['i_first'];
}
/**
* This function is not part of the public api.
* @return string initial of last name we are currently filtering by
*/
function get_initial_last() {
if (!$this->use_initials) {
return NULL;
}
return $this->prefs['i_last'];
}
/**
* Helper function, used by {@link print_initials_bar()} to output one initial bar.
* @param array $alpha of letters in the alphabet.
* @param string $current the currently selected letter.
* @param string $class class name to add to this initial bar.
* @param string $title the name to put in front of this initial bar.
* @param string $urlvar URL parameter name for this initial.
*
* @deprecated since Moodle 3.3
*/
protected function print_one_initials_bar($alpha, $current, $class, $title, $urlvar) {
debugging('Method print_one_initials_bar() is no longer used and has been deprecated, ' .
'to print initials bar call print_initials_bar()', DEBUG_DEVELOPER);
echo html_writer::start_tag('div', array('class' => 'initialbar ' . $class)) .
$title . ' : ';
if ($current) {
echo html_writer::link($this->baseurl->out(false, array($urlvar => '')), get_string('all'));
} else {
echo html_writer::tag('strong', get_string('all'));
}
foreach ($alpha as $letter) {
if ($letter === $current) {
echo html_writer::tag('strong', $letter);
} else {
echo html_writer::link($this->baseurl->out(false, array($urlvar => $letter)), $letter);
}
}
echo html_writer::end_tag('div');
}
/**
* This function is not part of the public api.
*/
function print_initials_bar() {
global $OUTPUT;
$ifirst = $this->get_initial_first();
$ilast = $this->get_initial_last();
if (is_null($ifirst)) {
$ifirst = '';
}
if (is_null($ilast)) {
$ilast = '';
}
if ((!empty($ifirst) || !empty($ilast) ||$this->use_initials)
&& isset($this->columns['fullname'])) {
$prefixfirst = $this->request[TABLE_VAR_IFIRST];
$prefixlast = $this->request[TABLE_VAR_ILAST];
echo $OUTPUT->initials_bar($ifirst, 'firstinitial', get_string('firstname'), $prefixfirst, $this->baseurl);
echo $OUTPUT->initials_bar($ilast, 'lastinitial', get_string('lastname'), $prefixlast, $this->baseurl);
}
}
/**
* This function is not part of the public api.
*/
function print_nothing_to_display() {
global $OUTPUT;
// Render button to allow user to reset table preferences.
echo $this->render_reset_button();
$this->print_initials_bar();
echo $OUTPUT->heading(get_string('nothingtodisplay'));
}
/**
* This function is not part of the public api.
*/
function get_row_from_keyed($rowwithkeys) {
if (is_object($rowwithkeys)) {
$rowwithkeys = (array)$rowwithkeys;
}
$row = array();
foreach (array_keys($this->columns) as $column) {
if (isset($rowwithkeys[$column])) {
$row [] = $rowwithkeys[$column];
} else {
$row[] ='';
}
}
return $row;
}
/**
* Get the html for the download buttons
*
* Usually only use internally
*/
public function download_buttons() {
global $OUTPUT;
if ($this->is_downloadable() && !$this->is_downloading()) {
return $OUTPUT->download_dataformat_selector(get_string('downloadas', 'table'),
$this->baseurl->out_omit_querystring(), 'download', $this->baseurl->params());
} else {
return '';
}
}
/**
* This function is not part of the public api.
* You don't normally need to call this. It is called automatically when
* needed when you start adding data to the table.
*
*/
function start_output() {
$this->started_output = true;
if ($this->exportclass!==null) {
$this->exportclass->start_table($this->sheettitle);
$this->exportclass->output_headers($this->headers);
} else {
$this->start_html();
$this->print_headers();
echo html_writer::start_tag('tbody');
}
}
/**
* This function is not part of the public api.
*/
function print_row($row, $classname = '') {
echo $this->get_row_html($row, $classname);
}
/**
* Generate html code for the passed row.
*
* @param array $row Row data.
* @param string $classname classes to add.
*
* @return string $html html code for the row passed.
*/
public function get_row_html($row, $classname = '') {
static $suppress_lastrow = NULL;
$rowclasses = array();
if ($classname) {
$rowclasses[] = $classname;
}
$rowid = $this->uniqueid . '_r' . $this->currentrow;
$html = '';
$html .= html_writer::start_tag('tr', array('class' => implode(' ', $rowclasses), 'id' => $rowid));
// If we have a separator, print it
if ($row === NULL) {
$colcount = count($this->columns);
$html .= html_writer::tag('td', html_writer::tag('div', '',
array('class' => 'tabledivider')), array('colspan' => $colcount));
} else {
$colbyindex = array_flip($this->columns);
foreach ($row as $index => $data) {
$column = $colbyindex[$index];
$attributes = [
'class' => "cell c{$index}" . $this->column_class[$column],
'id' => "{$rowid}_c{$index}",
'style' => $this->make_styles_string($this->column_style[$column]),
];
$celltype = 'td';
if ($this->headercolumn && $column == $this->headercolumn) {
$celltype = 'th';
$attributes['scope'] = 'row';
}
if (empty($this->prefs['collapse'][$column])) {
if ($this->column_suppress[$column] && $suppress_lastrow !== NULL && $suppress_lastrow[$index] === $data) {
$content = '&nbsp;';
} else {
$content = $data;
}
} else {
$content = '&nbsp;';
}
$html .= html_writer::tag($celltype, $content, $attributes);
}
}
$html .= html_writer::end_tag('tr');
$suppress_enabled = array_sum($this->column_suppress);
if ($suppress_enabled) {
$suppress_lastrow = $row;
}
$this->currentrow++;
return $html;
}
/**
* This function is not part of the public api.
*/
function finish_html() {
global $OUTPUT, $PAGE;
if (!$this->started_output) {
//no data has been added to the table.
$this->print_nothing_to_display();
} else {
// Print empty rows to fill the table to the current pagesize.
// This is done so the header aria-controls attributes do not point to
// non existant elements.
$emptyrow = array_fill(0, count($this->columns), '');
while ($this->currentrow < $this->pagesize) {
$this->print_row($emptyrow, 'emptyrow');
}
echo html_writer::end_tag('tbody');
echo html_writer::end_tag('table');
echo html_writer::end_tag('div');
$this->wrap_html_finish();
// Paging bar
if(in_array(TABLE_P_BOTTOM, $this->showdownloadbuttonsat)) {
echo $this->download_buttons();
}
if($this->use_pages) {
$pagingbar = new paging_bar($this->totalrows, $this->currpage, $this->pagesize, $this->baseurl);
$pagingbar->pagevar = $this->request[TABLE_VAR_PAGE];
echo $OUTPUT->render($pagingbar);
}
// Dynamic Table content.
if (is_a($this, \core_table\dynamic::class)) {
echo html_writer::end_tag('div');
$PAGE->requires->js_call_amd('core_table/dynamic', 'init');
}
}
}
/**
* Generate the HTML for the collapse/uncollapse icon. This is a helper method
* used by {@link print_headers()}.
* @param string $column the column name, index into various names.
* @param int $index numerical index of the column.
* @return string HTML fragment.
*/
protected function show_hide_link($column, $index) {
global $OUTPUT;
// Some headers contain <br /> tags, do not include in title, hence the
// strip tags.
$ariacontrols = '';
for ($i = 0; $i < $this->pagesize; $i++) {
$ariacontrols .= $this->uniqueid . '_r' . $i . '_c' . $index . ' ';
}
$ariacontrols = trim($ariacontrols);
if (!empty($this->prefs['collapse'][$column])) {
$linkattributes = array('title' => get_string('show') . ' ' . strip_tags($this->headers[$index]),
'aria-expanded' => 'false',
'aria-controls' => $ariacontrols);
return html_writer::link($this->baseurl->out(false, array($this->request[TABLE_VAR_SHOW] => $column)),
$OUTPUT->pix_icon('t/switch_plus', get_string('show')), $linkattributes);
} else if ($this->headers[$index] !== NULL) {
$linkattributes = array('title' => get_string('hide') . ' ' . strip_tags($this->headers[$index]),
'aria-expanded' => 'true',
'aria-controls' => $ariacontrols);
return html_writer::link($this->baseurl->out(false, array($this->request[TABLE_VAR_HIDE] => $column)),
$OUTPUT->pix_icon('t/switch_minus', get_string('hide')), $linkattributes);
}
}
/**
* This function is not part of the public api.
*/
function print_headers() {
global $CFG, $OUTPUT, $PAGE;
echo html_writer::start_tag('thead');
echo html_writer::start_tag('tr');
foreach ($this->columns as $column => $index) {
$icon_hide = '';
if ($this->is_collapsible) {
$icon_hide = $this->show_hide_link($column, $index);
}
$primarysortcolumn = '';
$primarysortorder = '';
if (reset($this->prefs['sortby'])) {
$primarysortcolumn = key($this->prefs['sortby']);
$primarysortorder = current($this->prefs['sortby']);
}
switch ($column) {
case 'fullname':
// Check the full name display for sortable fields.
if (has_capability('moodle/site:viewfullnames', $PAGE->context)) {
$nameformat = $CFG->alternativefullnameformat;
} else {
$nameformat = $CFG->fullnamedisplay;
}
if ($nameformat == 'language') {
$nameformat = get_string('fullnamedisplay');
}
$requirednames = order_in_string(get_all_user_name_fields(), $nameformat);
if (!empty($requirednames)) {
if ($this->is_sortable($column)) {
// Done this way for the possibility of more than two sortable full name display fields.
$this->headers[$index] = '';
foreach ($requirednames as $name) {
$sortname = $this->sort_link(get_string($name),
$name, $primarysortcolumn === $name, $primarysortorder);
$this->headers[$index] .= $sortname . ' / ';
}
$helpicon = '';
if (isset($this->helpforheaders[$index])) {
$helpicon = $OUTPUT->render($this->helpforheaders[$index]);
}
$this->headers[$index] = substr($this->headers[$index], 0, -3). $helpicon;
}
}
break;
case 'userpic':
// do nothing, do not display sortable links
break;
default:
if ($this->is_sortable($column)) {
$helpicon = '';
if (isset($this->helpforheaders[$index])) {
$helpicon = $OUTPUT->render($this->helpforheaders[$index]);
}
$this->headers[$index] = $this->sort_link($this->headers[$index],
$column, $primarysortcolumn == $column, $primarysortorder) . $helpicon;
}
}
$attributes = array(
'class' => 'header c' . $index . $this->column_class[$column],
'scope' => 'col',
);
if ($this->headers[$index] === NULL) {
$content = '&nbsp;';
} else if (!empty($this->prefs['collapse'][$column])) {
$content = $icon_hide;
} else {
if (is_array($this->column_style[$column])) {
$attributes['style'] = $this->make_styles_string($this->column_style[$column]);
}
$helpicon = '';
if (isset($this->helpforheaders[$index]) && !$this->is_sortable($column)) {
$helpicon = $OUTPUT->render($this->helpforheaders[$index]);
}
$content = $this->headers[$index] . $helpicon . html_writer::tag('div',
$icon_hide, array('class' => 'commands'));
}
echo html_writer::tag('th', $content, $attributes);
}
echo html_writer::end_tag('tr');
echo html_writer::end_tag('thead');
}
/**
* Calculate the preferences for sort order based on user-supplied values and get params.
*/
protected function set_sorting_preferences(): void {
$sortorder = $this->sortorder;
$sortby = $this->sortby;
if ($sortorder === null || $sortby === null) {
$sortorder = optional_param($this->request[TABLE_VAR_DIR], $this->sort_default_order, PARAM_INT);
$sortby = optional_param($this->request[TABLE_VAR_SORT], '', PARAM_ALPHANUMEXT);
}
$isvalidsort = $sortby && $this->is_sortable($sortby);
$isvalidsort = $isvalidsort && empty($this->prefs['collapse'][$sortby]);
$isrealcolumn = isset($this->columns[$sortby]);
$isfullnamefield = isset($this->columns['fullname']) && in_array($sortby, get_all_user_name_fields());
if ($isvalidsort && ($isrealcolumn || $isfullnamefield)) {
if (array_key_exists($sortby, $this->prefs['sortby'])) {
// This key already exists somewhere. Change its sortorder and bring it to the top.
$sortorder = $this->prefs['sortby'][$sortby] = $sortorder;
unset($this->prefs['sortby'][$sortby]);
$this->prefs['sortby'] = array_merge(array($sortby => $sortorder), $this->prefs['sortby']);
} else {
// Key doesn't exist, so just add it to the beginning of the array, ascending order
$this->prefs['sortby'] = array_merge(array($sortby => $sortorder), $this->prefs['sortby']);
}
// Finally, make sure that no more than $this->maxsortkeys are present into the array.
$this->prefs['sortby'] = array_slice($this->prefs['sortby'], 0, $this->maxsortkeys);
}
// If a default order is defined and it is not in the current list of order by columns, add it at the end.
// This prevents results from being returned in a random order if the only order by column contains equal values.
if (!empty($this->sort_default_column) && !array_key_exists($this->sort_default_column, $this->prefs['sortby'])) {
$defaultsort = array($this->sort_default_column => $this->sort_default_order);
$this->prefs['sortby'] = array_merge($this->prefs['sortby'], $defaultsort);
}
}
/**
* Set the preferred table sorting attributes.
*
* @param string $sortby The field to sort by.
* @param int $sortorder The sort order.
*/
public function set_sorting(string $sortby, string $sortorder): void {
$this->sortby = $sortby;
$this->sortorder = $sortorder;
}
/**
* Generate the HTML for the sort icon. This is a helper method used by {@link sort_link()}.
* @param bool $isprimary whether an icon is needed (it is only needed for the primary sort column.)
* @param int $order SORT_ASC or SORT_DESC
* @return string HTML fragment.
*/
protected function sort_icon($isprimary, $order) {
global $OUTPUT;
if (!$isprimary) {
return '';
}
if ($order == SORT_ASC) {
return $OUTPUT->pix_icon('t/sort_asc', get_string('asc'));
} else {
return $OUTPUT->pix_icon('t/sort_desc', get_string('desc'));
}
}
/**
* Generate the correct tool tip for changing the sort order. This is a
* helper method used by {@link sort_link()}.
* @param bool $isprimary whether the is column is the current primary sort column.
* @param int $order SORT_ASC or SORT_DESC
* @return string the correct title.
*/
protected function sort_order_name($isprimary, $order) {
if ($isprimary && $order != SORT_ASC) {
return get_string('desc');
} else {
return get_string('asc');
}
}
/**
* Generate the HTML for the sort link. This is a helper method used by {@link print_headers()}.
* @param string $text the text for the link.
* @param string $column the column name, may be a fake column like 'firstname' or a real one.
* @param bool $isprimary whether the is column is the current primary sort column.
* @param int $order SORT_ASC or SORT_DESC
* @return string HTML fragment.
*/
protected function sort_link($text, $column, $isprimary, $order) {
// If we are already sorting by this column, switch direction.
if (array_key_exists($column, $this->prefs['sortby'])) {
$sortorder = $this->prefs['sortby'][$column] == SORT_ASC ? SORT_DESC : SORT_ASC;
} else {
$sortorder = $order;
}
$params = [
$this->request[TABLE_VAR_SORT] => $column,
$this->request[TABLE_VAR_DIR] => $sortorder,
];
return html_writer::link($this->baseurl->out(false, $params),
$text . get_accesshide(get_string('sortby') . ' ' .
$text . ' ' . $this->sort_order_name($isprimary, $order)),
[
'data-sortable' => $this->is_sortable($column),
'data-sortby' => $column,
'data-sortorder' => $sortorder,
]) . ' ' . $this->sort_icon($isprimary, $order);
}
protected function get_sort_order(): array {
$sortbys = $this->prefs['sortby'];
$sortby = key($sortbys);
return [
'sortby' => $sortby,
'sortorder' => $sortbys[$sortby],
];
}
/**
* This function is not part of the public api.
*/
function start_html() {
global $OUTPUT;
if (is_a($this, \core_table\dynamic::class)) {
$sortdata = $this->get_sort_order();
echo html_writer::start_tag('div', [
'data-region' => 'core_table/dynamic',
'data-table-handler' => get_class($this),
'data-table-uniqueid' => $this->uniqueid,
'data-table-filters' => json_encode($this->get_filterset()),
'data-table-sortby' => $sortdata['sortby'],
'data-table-sortorder' => $sortdata['sortorder'],
]);
}
// Render button to allow user to reset table preferences.
echo $this->render_reset_button();
// Do we need to print initial bars?
$this->print_initials_bar();
// Paging bar
if ($this->use_pages) {
$pagingbar = new paging_bar($this->totalrows, $this->currpage, $this->pagesize, $this->baseurl);
$pagingbar->pagevar = $this->request[TABLE_VAR_PAGE];
echo $OUTPUT->render($pagingbar);
}
if (in_array(TABLE_P_TOP, $this->showdownloadbuttonsat)) {
echo $this->download_buttons();
}
$this->wrap_html_start();
// Start of main data table
echo html_writer::start_tag('div', array('class' => 'no-overflow'));
echo html_writer::start_tag('table', $this->attributes);
}
/**
* This function is not part of the public api.
* @param array $styles CSS-property => value
* @return string values suitably to go in a style="" attribute in HTML.
*/
function make_styles_string($styles) {
if (empty($styles)) {
return null;
}
$string = '';
foreach($styles as $property => $value) {
$string .= $property . ':' . $value . ';';
}
return $string;
}
/**
* Generate the HTML for the table preferences reset button.
*
* @return string HTML fragment, empty string if no need to reset
*/
protected function render_reset_button() {
if (!$this->can_be_reset()) {
return '';
}
$url = $this->baseurl->out(false, array($this->request[TABLE_VAR_RESET] => 1));
$html = html_writer::start_div('resettable mdl-right');
$html .= html_writer::link($url, get_string('resettable'));
$html .= html_writer::end_div();
return $html;
}
/**
* Are there some table preferences that can be reset?
*
* If true, then the "reset table preferences" widget should be displayed.
*
* @return bool
*/
protected function can_be_reset() {
// Loop through preferences and make sure they are empty or set to the default value.
foreach ($this->prefs as $prefname => $prefval) {
if ($prefname === 'sortby' and !empty($this->sort_default_column)) {
// Check if the actual sorting differs from the default one.
if (empty($prefval) or $prefval !== array($this->sort_default_column => $this->sort_default_order)) {
return true;
}
} else if ($prefname === 'collapse' and !empty($prefval)) {
// Check if there are some collapsed columns (all are expanded by default).
foreach ($prefval as $columnname => $iscollapsed) {
if ($iscollapsed) {
return true;
}
}
} else if (!empty($prefval)) {
// For all other cases, we just check if some preference is set.
return true;
}
}
return false;
}
}
/**
* @package moodlecore
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class table_sql extends flexible_table {
public $countsql = NULL;
public $countparams = NULL;
/**
* @var object sql for querying db. Has fields 'fields', 'from', 'where', 'params'.
*/
public $sql = NULL;
/**
* @var array|\Traversable Data fetched from the db.
*/
public $rawdata = NULL;
/**
* @var bool Overriding default for this.
*/
public $is_sortable = true;
/**
* @var bool Overriding default for this.
*/
public $is_collapsible = true;
/**
* @param string $uniqueid a string identifying this table.Used as a key in
* session vars.
*/
function __construct($uniqueid) {
parent::__construct($uniqueid);
// some sensible defaults
$this->set_attribute('cellspacing', '0');
$this->set_attribute('class', 'generaltable generalbox');
}
/**
* Take the data returned from the db_query and go through all the rows
* processing each col using either col_{columnname} method or other_cols
* method or if other_cols returns NULL then put the data straight into the
* table.
*
* After calling this function, don't forget to call close_recordset.
*/
public function build_table() {
if ($this->rawdata instanceof \Traversable && !$this->rawdata->valid()) {
return;
}
if (!$this->rawdata) {
return;
}
foreach ($this->rawdata as $row) {
$formattedrow = $this->format_row($row);
$this->add_data_keyed($formattedrow,
$this->get_row_class($row));
}
}
/**
* Closes recordset (for use after building the table).
*/
public function close_recordset() {
if ($this->rawdata && ($this->rawdata instanceof \core\dml\recordset_walk ||
$this->rawdata instanceof moodle_recordset)) {
$this->rawdata->close();
$this->rawdata = null;
}
}
/**
* Get any extra classes names to add to this row in the HTML.
* @param $row array the data for this row.
* @return string added to the class="" attribute of the tr.
*/
function get_row_class($row) {
return '';
}
/**
* This is only needed if you want to use different sql to count rows.
* Used for example when perhaps all db JOINS are not needed when counting
* records. You don't need to call this function the count_sql
* will be generated automatically.
*
* We need to count rows returned by the db seperately to the query itself
* as we need to know how many pages of data we have to display.
*/
function set_count_sql($sql, array $params = NULL) {
$this->countsql = $sql;
$this->countparams = $params;
}
/**
* Set the sql to query the db. Query will be :
* SELECT $fields FROM $from WHERE $where
* Of course you can use sub-queries, JOINS etc. by putting them in the
* appropriate clause of the query.
*/
function set_sql($fields, $from, $where, array $params = array()) {
$this->sql = new stdClass();
$this->sql->fields = $fields;
$this->sql->from = $from;
$this->sql->where = $where;
$this->sql->params = $params;
}
/**
* Query the db. Store results in the table object for use by build_table.
*
* @param int $pagesize size of page for paginated displayed table.
* @param bool $useinitialsbar do you want to use the initials bar. Bar
* will only be used if there is a fullname column defined for the table.
*/
function query_db($pagesize, $useinitialsbar=true) {
global $DB;
if (!$this->is_downloading()) {
if ($this->countsql === NULL) {
$this->countsql = 'SELECT COUNT(1) FROM '.$this->sql->from.' WHERE '.$this->sql->where;
$this->countparams = $this->sql->params;
}
$grandtotal = $DB->count_records_sql($this->countsql, $this->countparams);
if ($useinitialsbar && !$this->is_downloading()) {
$this->initialbars(true);
}
list($wsql, $wparams) = $this->get_sql_where();
if ($wsql) {
$this->countsql .= ' AND '.$wsql;
$this->countparams = array_merge($this->countparams, $wparams);
$this->sql->where .= ' AND '.$wsql;
$this->sql->params = array_merge($this->sql->params, $wparams);
$total = $DB->count_records_sql($this->countsql, $this->countparams);
} else {
$total = $grandtotal;
}
$this->pagesize($pagesize, $total);
}
// Fetch the attempts
$sort = $this->get_sql_sort();
if ($sort) {
$sort = "ORDER BY $sort";
}
$sql = "SELECT
{$this->sql->fields}
FROM {$this->sql->from}
WHERE {$this->sql->where}
{$sort}";
if (!$this->is_downloading()) {
$this->rawdata = $DB->get_records_sql($sql, $this->sql->params, $this->get_page_start(), $this->get_page_size());
} else {
$this->rawdata = $DB->get_records_sql($sql, $this->sql->params);
}
}
/**
* Convenience method to call a number of methods for you to display the
* table.
*/
function out($pagesize, $useinitialsbar, $downloadhelpbutton='') {
global $DB;
if (!$this->columns) {
$onerow = $DB->get_record_sql("SELECT {$this->sql->fields} FROM {$this->sql->from} WHERE {$this->sql->where}",
$this->sql->params, IGNORE_MULTIPLE);
//if columns is not set then define columns as the keys of the rows returned
//from the db.
$this->define_columns(array_keys((array)$onerow));
$this->define_headers(array_keys((array)$onerow));
}
$this->setup();
$this->query_db($pagesize, $useinitialsbar);
$this->build_table();
$this->close_recordset();
$this->finish_output();
}
}
/**
* @package moodlecore
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class table_default_export_format_parent {
/**
* @var flexible_table or child class reference pointing to table class
* object from which to export data.
*/
var $table;
/**
* @var bool output started. Keeps track of whether any output has been
* started yet.
*/
var $documentstarted = false;
/**
* Constructor
*
* @param flexible_table $table
*/
public function __construct(&$table) {
$this->table =& $table;
}
/**
* Old syntax of class constructor. Deprecated in PHP7.
*
* @deprecated since Moodle 3.1
*/
public function table_default_export_format_parent(&$table) {
debugging('Use of class name as constructor is deprecated', DEBUG_DEVELOPER);
self::__construct($table);
}
function set_table(&$table) {
$this->table =& $table;
}
function add_data($row) {
return false;
}
function add_seperator() {
return false;
}
function document_started() {
return $this->documentstarted;
}
/**
* Given text in a variety of format codings, this function returns
* the text as safe HTML or as plain text dependent on what is appropriate
* for the download format. The default removes all tags.
*/
function format_text($text, $format=FORMAT_MOODLE, $options=NULL, $courseid=NULL) {
//use some whitespace to indicate where there was some line spacing.
$text = str_replace(array('</p>', "\n", "\r"), ' ', $text);
return strip_tags($text);
}
}
/**
* Dataformat exporter
*
* @package core
* @subpackage tablelib
* @copyright 2016 Brendan Heywood (brendan@catalyst-au.net)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class table_dataformat_export_format extends table_default_export_format_parent {
/** @var $dataformat */
protected $dataformat;
/** @var $rownum */
protected $rownum = 0;
/** @var $columns */
protected $columns;
/**
* Constructor
*
* @param string $table An sql table
* @param string $dataformat type of dataformat for export
*/
public function __construct(&$table, $dataformat) {
parent::__construct($table);
if (ob_get_length()) {
throw new coding_exception("Output can not be buffered before instantiating table_dataformat_export_format");
}
$classname = 'dataformat_' . $dataformat . '\writer';
if (!class_exists($classname)) {
throw new coding_exception("Unable to locate dataformat/$dataformat/classes/writer.php");
}
$this->dataformat = new $classname;
// The dataformat export time to first byte could take a while to generate...
set_time_limit(0);
// Close the session so that the users other tabs in the same session are not blocked.
\core\session\manager::write_close();
}
/**
* Start document
*
* @param string $filename
* @param string $sheettitle
*/
public function start_document($filename, $sheettitle) {
$this->documentstarted = true;
$this->dataformat->set_filename($filename);
$this->dataformat->send_http_headers();
$this->dataformat->set_sheettitle($sheettitle);
$this->dataformat->start_output();
}
/**
* Start export
*
* @param string $sheettitle optional spreadsheet worksheet title
*/
public function start_table($sheettitle) {
$this->dataformat->set_sheettitle($sheettitle);
}
/**
* Output headers
*
* @param array $headers
*/
public function output_headers($headers) {
$this->columns = $headers;
if (method_exists($this->dataformat, 'write_header')) {
error_log('The function write_header() does not support multiple sheets. In order to support multiple sheets you ' .
'must implement start_output() and start_sheet() and remove write_header() in your dataformat.');
$this->dataformat->write_header($headers);
} else {
$this->dataformat->start_sheet($headers);
}
}
/**
* Add a row of data
*
* @param array $row One record of data
*/
public function add_data($row) {
$this->dataformat->write_record($row, $this->rownum++);
return true;
}
/**
* Finish export
*/
public function finish_table() {
if (method_exists($this->dataformat, 'write_footer')) {
error_log('The function write_footer() does not support multiple sheets. In order to support multiple sheets you ' .
'must implement close_sheet() and close_output() and remove write_footer() in your dataformat.');
$this->dataformat->write_footer($this->columns);
} else {
$this->dataformat->close_sheet($this->columns);
}
}
/**
* Finish download
*/
public function finish_document() {
$this->dataformat->close_output();
exit();
}
}
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