David Monllao
222 lines
10 KiB
PHP
222 lines
10 KiB
PHP
<?php
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///////////////////////////////////////////////////////////////////////////
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// //
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// NOTICE OF COPYRIGHT //
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// //
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// Moodle - Modular Object-Oriented Dynamic Learning Environment //
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// http://moodle.org //
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// //
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// Copyright (C) 1999-onwards Moodle Pty Ltd http://moodle.com //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation; either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details: //
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// //
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// http://www.gnu.org/copyleft/gpl.html //
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// //
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///////////////////////////////////////////////////////////////////////////
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class data_field_latlong extends data_field_base {
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var $type = 'latlong';
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// This is an array of URL schemes for linking out to services, using the float values of lat and long.
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// In each scheme, the special markers @lat@ and @long@ will be replaced by the float values.
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// The config options for the field store each service name that should be displayed, in a comma-separated
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// field. Therefore please DO NOT include commas in the service names if you are adding extra services.
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// Parameter data used:
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// "param1" is a comma-separated list of the linkout service names that are enabled for this instance
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// "param2" indicates the label that will be used in generating Google Earth KML files: -1 for item #, -2 for lat/long, positive number for the (text) field to use.
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var $linkoutservices = array(
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"Google Maps" => "http://maps.google.com/maps?q=@lat@,+@long@&iwloc=A&hl=en",
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"Google Earth" => "@wwwroot@/mod/data/field/latlong/kml.php?d=@dataid@&fieldid=@fieldid@&rid=@recordid@",
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"Geabios" => "http://www.geabios.com/html/services/maps/PublicMap.htm?lat=@lat@&lon=@long@&fov=0.3&title=Moodle%20data%20item",
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"OpenStreetMap" => "http://www.openstreetmap.org/index.html?lat=@lat@&lon=@long@&zoom=11",
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"Multimap" => "http://www.multimap.com/map/browse.cgi?scale=200000&lon=@long@&lat=@lat@&icon=x"
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);
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// Other map sources listed at http://kvaleberg.com/extensions/mapsources/index.php?params=51_30.4167_N_0_7.65_W_region:earth
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function display_add_field($recordid=0) {
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global $CFG, $DB;
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$lat = '';
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$long = '';
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if ($recordid) {
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if ($content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
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$lat = $content->content;
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$long = $content->content1;
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}
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}
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$str = '<div title="'.s($this->field->description).'">';
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$str .= '<fieldset><legend><span class="accesshide">'.$this->field->name.'</span></legend>';
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$str .= '<table><tr><td align="right">';
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$str .= '<label for="field_'.$this->field->id.'_0">' . get_string('latitude', 'data') . '</label></td><td><input type="text" name="field_'.$this->field->id.'_0" id="field_'.$this->field->id.'_0" value="'.s($lat).'" size="10" />°N</td></tr>';
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$str .= '<tr><td align="right"><label for="field_'.$this->field->id.'_1">' . get_string('longitude', 'data') . '</label></td><td><input type="text" name="field_'.$this->field->id.'_1" id="field_'.$this->field->id.'_1" value="'.s($long).'" size="10" />°E</td></tr>';
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$str .= '</table>';
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$str .= '</fieldset>';
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$str .= '</div>';
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return $str;
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}
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function display_search_field($value = '') {
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global $CFG, $DB;
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$varcharlat = $DB->sql_compare_text('content');
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$varcharlong= $DB->sql_compare_text('content1');
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$latlongsrs = $DB->get_recordset_sql(
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"SELECT DISTINCT $varcharlat AS la, $varcharlong AS lo
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FROM {data_content}
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WHERE fieldid = ?
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ORDER BY $varcharlat, $varcharlong", array($this->field->id));
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$options = array();
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foreach ($latlongsrs as $latlong) {
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$options[$latlong->la . ',' . $latlong->lo] = $latlong->la . ',' . $latlong->lo;
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}
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$latlongsrs->close();
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$return = html_writer::label(get_string('latlong', 'data'), 'menuf_'.$this->field->id, false, array('class' => 'accesshide'));
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$return .= html_writer::select($options, 'f_'.$this->field->id, $value);
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return $return;
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}
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function parse_search_field() {
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return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS);
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}
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function generate_sql($tablealias, $value) {
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global $DB;
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static $i=0;
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$i++;
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$name1 = "df_latlong1_$i";
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$name2 = "df_latlong2_$i";
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$varcharlat = $DB->sql_compare_text("{$tablealias}.content");
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$varcharlong= $DB->sql_compare_text("{$tablealias}.content1");
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$latlong[0] = '';
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$latlong[1] = '';
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$latlong = explode (',', $value, 2);
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return array(" ({$tablealias}.fieldid = {$this->field->id} AND $varcharlat = :$name1 AND $varcharlong = :$name2) ",
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array($name1=>$latlong[0], $name2=>$latlong[1]));
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}
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function display_browse_field($recordid, $template) {
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global $CFG, $DB;
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if ($content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
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$lat = $content->content;
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if (strlen($lat) < 1) {
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return false;
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}
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$long = $content->content1;
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if (strlen($long) < 1) {
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return false;
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}
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if($lat < 0) {
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$compasslat = sprintf('%01.4f', -$lat) . '°S';
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} else {
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$compasslat = sprintf('%01.4f', $lat) . '°N';
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}
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if($long < 0) {
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$compasslong = sprintf('%01.4f', -$long) . '°W';
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} else {
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$compasslong = sprintf('%01.4f', $long) . '°E';
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}
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// Now let's create the jump-to-services link
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$servicesshown = explode(',', $this->field->param1);
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// These are the different things that can be magically inserted into URL schemes
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$urlreplacements = array(
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'@lat@'=> $lat,
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'@long@'=> $long,
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'@wwwroot@'=> $CFG->wwwroot,
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'@contentid@'=> $content->id,
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'@dataid@'=> $this->data->id,
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'@courseid@'=> $this->data->course,
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'@fieldid@'=> $content->fieldid,
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'@recordid@'=> $content->recordid,
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);
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if(sizeof($servicesshown)==1 && $servicesshown[0]) {
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$str = " <a href='"
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. str_replace(array_keys($urlreplacements), array_values($urlreplacements), $this->linkoutservices[$servicesshown[0]])
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."' title='$servicesshown[0]'>$compasslat, $compasslong</a>";
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} elseif (sizeof($servicesshown)>1) {
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$str = '<form id="latlongfieldbrowse">';
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$str .= "$compasslat, $compasslong\n";
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$str .= "<label class='accesshide' for='jumpto'>". get_string('jumpto') ."</label>";
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$str .= "<select id='jumpto' name='jumpto'>";
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foreach($servicesshown as $servicename){
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// Add a link to a service
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$str .= "\n <option value='"
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. str_replace(array_keys($urlreplacements), array_values($urlreplacements), $this->linkoutservices[$servicename])
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. "'>".htmlspecialchars($servicename)."</option>";
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}
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// NB! If you are editing this, make sure you don't break the javascript reference "previousSibling"
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// which allows the "Go" button to refer to the drop-down selector.
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$str .= "\n</select><input type='button' value='" . get_string('go') . "' onclick='if(previousSibling.value){self.location=previousSibling.value}'/>";
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$str .= '</form>';
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} else {
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$str = "$compasslat, $compasslong";
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}
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return $str;
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}
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return false;
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}
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function update_content($recordid, $value, $name='') {
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global $DB;
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$content = new stdClass();
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$content->fieldid = $this->field->id;
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$content->recordid = $recordid;
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$value = trim($value);
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if (strlen($value) > 0) {
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$value = floatval($value);
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} else {
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$value = null;
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}
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$names = explode('_', $name);
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switch ($names[2]) {
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case 0:
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// update lat
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$content->content = $value;
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break;
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case 1:
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// update long
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$content->content1 = $value;
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break;
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default:
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break;
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}
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if ($oldcontent = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
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$content->id = $oldcontent->id;
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return $DB->update_record('data_content', $content);
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} else {
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return $DB->insert_record('data_content', $content);
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}
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}
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function get_sort_sql($fieldname) {
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global $DB;
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return $DB->sql_cast_char2real($fieldname, true);
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}
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function export_text_value($record) {
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return sprintf('%01.4f', $record->content) . ' ' . sprintf('%01.4f', $record->content1);
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}
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}
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