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filters.php
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filters.php
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<?php
// filters.php
// Edit list of available text filters
require_once "../config.php";
require_once "$CFG->libdir/tablelib.php";
// defines
define( 'FILTER_TABLE','filter_administration_table' );
// check for allowed access
require_login();
if (!isadmin()) {
error( 'Only administrators can use the filters administration page' );
}
if (!$site = get_site()) {
error( 'Site is not defined in filters administration page' );
}
// get values from page
$params = new Object;
$params->action = optional_param( 'action','',PARAM_ALPHA );
$params->filterpath = optional_param( 'filterpath', '' );
$params->cachetext = optional_param( 'cachetext','0',PARAM_INT );
$params->filteruploadedfiles = optional_param( 'filteruploadedfiles','',PARAM_ALPHA );
$params->filterall = optional_param( 'filterall','',PARAM_ALPHA );
// get translated strings for use on page
$txt = new Object;
$txt->managefilters = get_string( 'managefilters' );
$txt->administration = get_string( 'administration' );
$txt->configuration = get_string( 'configuration' );
$txt->name = get_string( 'name' );
$txt->hide = get_string( 'hide' );
$txt->show = get_string( 'show' );
$txt->hideshow = "$txt->hide/$txt->show";
$txt->settings = get_string( 'settings' );
$txt->up = get_string( 'up' );
$txt->down = get_string( 'down' );
$txt->updown = "$txt->up/$txt->down";
$txt->cachetext = get_string( 'cachetext', 'admin' );
$txt->configcachetext = get_string( 'configcachetext', 'admin' );
$txt->filteruploadedfiles = get_string( 'filteruploadedfiles','admin' );
$txt->configfilteruploadedfiles = get_string( 'configfilteruploadedfiles','admin' );
$txt->filterall = get_string( 'filterall','admin' );
$txt->configfilterall = get_string( 'configfilterall','admin' );
$txt->cachecontrols = get_string( 'cachecontrols' );
$txt->yes = get_string( 'yes' );
$txt->no = get_string('no');
// get a list of possible filters (and translate name if possible)
// note filters can be in the dedicated filters area OR in their
// associated modules
$allfilters = array();
$filtersettings = array();
$filterlocations = array('mod','filter');
foreach ($filterlocations as $filterlocation) {
$plugins = get_list_of_plugins( $filterlocation );
foreach ($plugins as $plugin) {
$pluginpath = "$CFG->dirroot/$filterlocation/$plugin/filter.php";
$settingspath = "$CFG->dirroot/$filterlocation/$plugin/filterconfig.html";
if (is_readable( $pluginpath )) {
$name = trim( get_string("filtername", $plugin) );
if (empty($name) or ($name == '[[filtername]]')) {
$name = $plugin;
}
$allfilters[ "$filterlocation/$plugin" ] = ucfirst( $name );
}
if (is_readable($settingspath)) {
$filtersettings[] = "$filterlocation/$plugin";
}
}
}
// get all the currently selected filters
if (!empty($CFG->textfilters)) {
$installedfilters = explode( ',', $CFG->textfilters );
}
else {
$installedfilters = array();
}
// take this opportunity to clean up filters
$oldinstalledfilters = $installedfilters;
$installedfilters = array();
foreach ($oldinstalledfilters as $key => $installedfilter ) {
if (!empty( $installedfilter ) and array_key_exists( $installedfilter, $allfilters ) ) {
$installedfilters[ $key ] = $installedfilter;
}
}
set_config( 'textfilters', implode( ',', $installedfilters ) );
//======================
// Process Actions
//======================
if (($params->action=="hide") and confirm_sesskey()) {
$key=array_search( $params->filterpath, $installedfilters );
// check filterpath is valid
if ($key===false) {
error( "Filter $params->filterpath is not a currently installed filter" );
}
// just delete it
unset( $installedfilters[ $key ] );
set_config( 'textfilters', implode( ',', $installedfilters ) );
}
if (($params->action=="show") and confirm_sesskey()) {
// check filterpath is valid
if (!array_key_exists( $params->filterpath, $allfilters ) ) {
error( "Filter $params->filterpath is not a currently installed filter" );
}
if (array_search( $params->filterpath,$installedfilters ) ) {
error( "Filter $params->filterpath is already active" );
}
// add it to installed filters
$installedfilters[] = $params->filterpath;
set_config( 'textfilters', implode( ',', $installedfilters ) );
}
if (($params->action=="down") and confirm_sesskey()) {
$key=array_search( $params->filterpath, $installedfilters );
// check filterpath is valid
if ($key===false ) {
error( "Filter $params->filterpath is not a currently installed filter" );
}
if ($key>=(count($installedfilters)-1)) {
error( "Filter $params->filterpath cannot be moved any further down" );
}
// swap with $key+1
$fsave = $installedfilters[$key];
$installedfilters[$key] = $installedfilters[$key+1];
$installedfilters[$key+1] = $fsave;
set_config( 'textfilters', implode( ',', $installedfilters ) );
}
if (($params->action=="up") and confirm_sesskey()) {
$key=array_search( $params->filterpath, $installedfilters );
// check filterpath is valid
if ($key===false ) {
error( "Filter $params->filterpath is not a currently installed filter" );
}
if ($key<1) {
error( "Filter $params->filterpath cannot be moved any further up" );
}
// swap with $key-1
$fsave = $installedfilters[$key];
$installedfilters[$key] = $installedfilters[$key-1];
$installedfilters[$key-1] = $fsave;
set_config( 'textfilters', implode( ',', $installedfilters ) );
}
if (($params->action=="config") and confirm_sesskey()) {
set_config( 'cachetext', $params->cachetext );
set_config( 'filteruploadedfiles', $params->filteruploadedfiles );
set_config( 'filterall', $params->filterall );
}
//======================
// Build Display Objects
//======================
// construct the display array with installed filters
// at the top in the right order
$displayfilters = array();
foreach ($installedfilters as $installedfilter) {
$name = $allfilters[ $installedfilter ];
$displayfilters[ $installedfilter ] = $name;
}
foreach ($allfilters as $key => $filter) {
if (!array_key_exists( $key, $displayfilters )) {
$displayfilters[ $key ] = $filter;
}
}
// construct the flexible table ready to display
$table = new flexible_table(FILTER_TABLE);
$table->define_columns( array( 'name', 'hideshow', 'order', 'settings' ) );
$table->define_headers( array( $txt->name, $txt->hideshow, $txt->updown, $txt->settings ) );
$table->define_baseurl( "$CFG->wwwroot/admin/filters.php" );
$table->set_attribute( 'id', 'blocks' );
$table->set_attribute( 'class', 'flexible generaltable generalbox' );
$table->setup();
// some basic information
$url = strip_querystring( qualified_me() );
$myurl = "$url?sesskey=" . sesskey();
$img = "$CFG->pixpath/t";
// iterate through filters adding to display table
$updowncount = 1;
$installedfilterscount = count( $installedfilters );
foreach( $displayfilters as $path => $name ) {
$upath = urlencode( $path );
// get hide/show link
if (in_array( $path, $installedfilters )) {
$hideshow = "<a href=\"$myurl&action=hide&filterpath=$path\">";
$hideshow .= "<img src=\"$img/hide.gif\" alt=\"hide\"></a>";
$hidden = false;
}
else {
$hideshow = "<a href=\"$myurl&action=show&filterpath=$path\">";
$hideshow .= "<img src=\"$img/show.gif\" alt=\"show\"></a>";
$hidden = true;
}
// get up/down link (only if not hidden)
$updown = '';
if (!$hidden) {
if ($updowncount>1) {
$updown .= "<a href=\"$myurl&action=up&filterpath=$path\">";
$updown .= "<img src=\"$img/up.gif\" alt=\"up\"></a> ";
}
else {
$updown .= "<img src=\"$CFG->pixpath/spacer.gif\" height=\"16\" width=\"16\" alt=\"\"> ";
}
if ($updowncount<$installedfilterscount) {
$updown .= "<a href=\"$myurl&action=down&filterpath=$path\">";
$updown .= "<img src=\"$img/down.gif\" alt=\"down\"></a>";
}
else {
$updown .= "<img src=\"$CFG->pixpath/spacer.gif\" height=\"16\" width=\"16\" alt=\"\">";
}
++$updowncount;
}
// settings link (if defined)
$settings = '';
if (in_array( $path, $filtersettings )) {
$settings = "<a href=\"filter.php?filter=" . urlencode($path) . "\">";
$settings .= "{$txt->settings}</a>";
}
// write data into the table object
$table->add_data( array( $name, $hideshow, $updown, $settings ) );
}
// build options list for cache lifetime
$seconds = array(604800,86400,43200,10800,7200,3600,2700,1800,900,600,540,480,420,360,300,240,180,120,60,30,0);
unset($lifetimeoptions);
foreach ($seconds as $second) {
if ($second>=86400) {
$options[$second] = get_string('numdays','',$second/86400);
}
elseif ($second>=3600) {
$options[$second] = get_string('numhours','',$second/3600);
}
elseif ($second>=60) {
$options[$second] = get_string('numminutes','',$second/60);
}
elseif ($second>=1) {
$options[$second] = get_string('numseconds','',$second);
}
else {
$options[$second] = get_string('no');
}
}
// help button
$help = helpbutton( 'filters','','moodle',true,false,'',true );
//==============================
// Display logic
//==============================
print_header( "$site->shortname: $txt->managefilters", "$site->fullname",
"<a href=\"index.php\">$txt->administration</a> -> <a href=\"configure.php\">$txt->configuration</a> " .
"-> $txt->managefilters" );
print_heading( $txt->managefilters . $help );
// print the table of all the filters
$table->print_html();
// print the table for the cache controls
print_heading( $txt->cachecontrols );
print_simple_box_start('center');
?>
<form name="options" id="options" method="post" action="<?php echo $url; ?>" >
<input type="hidden" name="sesskey" value="<?php echo sesskey(); ?>" />
<input type="hidden" name="action" value="config" />
<table cellpadding="20">
<tr valign="top">
<td nowrap="nowrap" align="right"><?php echo $txt->cachetext; ?></td>
<td><?php choose_from_menu( $options, "cachetext", $CFG->cachetext, "", "", "" ); ?></td>
<td><?php echo $txt->configcachetext; ?></td>
</tr>
<tr valign="top">
<td nowrap="nowrap" align="right"><?php echo $txt->filteruploadedfiles; ?></td>
<td><?php choose_from_menu( array($txt->no,$txt->yes), "filteruploadedfiles", $CFG->filteruploadedfiles,"","",""); ?></td>
<td><?php echo $txt->configfilteruploadedfiles; ?></td>
</tr>
<tr valign="top">
<td nowrap="nowrap" align="right"><?php echo $txt->filterall; ?></td>
<td><?php choose_from_menu( array($txt->no,$txt->yes), "filterall", $CFG->filterall,"","",""); ?></td>
<td><?php echo $txt->configfilterall; ?></td>
</tr>
<tr valign="top">
<td> </td>
<td><input type="submit" value="<?php print_string('savechanges'); ?>" /></td>
<td> </td>
</tr>
</table>
</form>
<?php
print_simple_box_end();
print_footer();
?>