File: /home/iestorre/moodleAW/moodle10/mod/data/field/latlong/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_latlong extends data_field_base {
var $type = 'latlong';
// This is an array of URL schemes for linking out to services, using the float values of lat and long.
// In each scheme, the special markers @lat@ and @long@ will be replaced by the float values.
// The config options for the field store each service name that should be displayed, in a comma-separated
// field. Therefore please DO NOT include commas in the service names if you are adding extra services.
// Parameter data used:
// "param1" is a comma-separated list of the linkout service names that are enabled for this instance
// "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.
var $linkoutservices = array(
"Google Maps" => "http://maps.google.com/maps?q=@lat@,+@long@&iwloc=A&hl=en",
"Google Earth" => "@wwwroot@/mod/data/field/latlong/kml.php?d=@dataid@&fieldid=@fieldid@&rid=@recordid@",
"Geabios" => "http://www.geabios.com/html/services/maps/PublicMap.htm?lat=@lat@&lon=@long@&fov=0.3&title=Moodle%20data%20item",
"OpenStreetMap" => "http://www.openstreetmap.org/index.html?lat=@lat@&lon=@long@&zoom=11",
"Multimap" => "http://www.multimap.com/map/browse.cgi?scale=200000&lon=@long@&lat=@lat@&icon=x"
);
// Other map sources listed at http://kvaleberg.com/extensions/mapsources/index.php?params=51_30.4167_N_0_7.65_W_region:earth
function display_add_field($recordid=0) {
global $CFG, $DB;
$lat = '';
$long = '';
if ($recordid) {
if ($content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
$lat = $content->content;
$long = $content->content1;
}
}
$str = '<div title="'.s($this->field->description).'">';
$str .= '<fieldset><legend><span class="accesshide">'.$this->field->name.'</span></legend>';
$str .= '<table><tr><td align="right">';
$str .= '<label for="field_'.$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>';
$str .= '<tr><td align="right"><label for="field_'.$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>';
$str .= '</table>';
$str .= '</fieldset>';
$str .= '</div>';
return $str;
}
function display_search_field($value = '') {
global $CFG, $DB;
$varcharlat = $DB->sql_compare_text('content');
$varcharlong= $DB->sql_compare_text('content1');
$latlongsrs = $DB->get_recordset_sql(
"SELECT DISTINCT $varcharlat AS la, $varcharlong AS lo
FROM {data_content}
WHERE fieldid = ?
ORDER BY $varcharlat, $varcharlong", array($this->field->id));
$options = array();
foreach ($latlongsrs as $latlong) {
$latitude = format_float($latlong->la, 4);
$longitude = format_float($latlong->lo, 4);
$options[$latlong->la . ',' . $latlong->lo] = $latitude . ' ' . $longitude;
}
$latlongsrs->close();
$return = html_writer::label(get_string('latlong', 'data'), 'menuf_'.$this->field->id, false, array('class' => 'accesshide'));
$return .= html_writer::select($options, 'f_'.$this->field->id, $value);
return $return;
}
function parse_search_field() {
return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS);
}
function generate_sql($tablealias, $value) {
global $DB;
static $i=0;
$i++;
$name1 = "df_latlong1_$i";
$name2 = "df_latlong2_$i";
$varcharlat = $DB->sql_compare_text("{$tablealias}.content");
$varcharlong= $DB->sql_compare_text("{$tablealias}.content1");
$latlong[0] = '';
$latlong[1] = '';
$latlong = explode (',', $value, 2);
return array(" ({$tablealias}.fieldid = {$this->field->id} AND $varcharlat = :$name1 AND $varcharlong = :$name2) ",
array($name1=>$latlong[0], $name2=>$latlong[1]));
}
function display_browse_field($recordid, $template) {
global $CFG, $DB;
if ($content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
$lat = $content->content;
if (strlen($lat) < 1) {
return false;
}
$long = $content->content1;
if (strlen($long) < 1) {
return false;
}
// We use format_float to display in the regional format.
if($lat < 0) {
$compasslat = format_float(-$lat, 4) . '°S';
} else {
$compasslat = format_float($lat, 4) . '°N';
}
if($long < 0) {
$compasslong = format_float(-$long, 4) . '°W';
} else {
$compasslong = format_float($long, 4) . '°E';
}
// Now let's create the jump-to-services link
$servicesshown = explode(',', $this->field->param1);
// These are the different things that can be magically inserted into URL schemes
$urlreplacements = array(
'@lat@'=> $lat,
'@long@'=> $long,
'@wwwroot@'=> $CFG->wwwroot,
'@contentid@'=> $content->id,
'@dataid@'=> $this->data->id,
'@courseid@'=> $this->data->course,
'@fieldid@'=> $content->fieldid,
'@recordid@'=> $content->recordid,
);
if(sizeof($servicesshown)==1 && $servicesshown[0]) {
$str = " <a href='"
. str_replace(array_keys($urlreplacements), array_values($urlreplacements), $this->linkoutservices[$servicesshown[0]])
."' title='$servicesshown[0]'>$compasslat $compasslong</a>";
} elseif (sizeof($servicesshown)>1) {
$str = '<form id="latlongfieldbrowse">';
$str .= "$compasslat, $compasslong\n";
$str .= "<label class='accesshide' for='jumpto'>". get_string('jumpto') ."</label>";
$str .= "<select id='jumpto' name='jumpto'>";
foreach($servicesshown as $servicename){
// Add a link to a service
$str .= "\n <option value='"
. str_replace(array_keys($urlreplacements), array_values($urlreplacements), $this->linkoutservices[$servicename])
. "'>".htmlspecialchars($servicename)."</option>";
}
// NB! If you are editing this, make sure you don't break the javascript reference "previousSibling"
// which allows the "Go" button to refer to the drop-down selector.
$str .= "\n</select><input type='button' value='" . get_string('go') . "' onclick='if(previousSibling.value){self.location=previousSibling.value}'/>";
$str .= '</form>';
} else {
$str = "$compasslat, $compasslong";
}
return $str;
}
return false;
}
function update_content($recordid, $value, $name='') {
global $DB;
$content = new stdClass();
$content->fieldid = $this->field->id;
$content->recordid = $recordid;
// When updating these values (which might be region formatted) we should format
// the float to allow for a consistent float format in the database.
$value = unformat_float($value);
$value = trim($value);
if (strlen($value) > 0) {
$value = floatval($value);
} else {
$value = null;
}
$names = explode('_', $name);
switch ($names[2]) {
case 0:
// update lat
$content->content = $value;
break;
case 1:
// update long
$content->content1 = $value;
break;
default:
break;
}
if ($oldcontent = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) {
$content->id = $oldcontent->id;
return $DB->update_record('data_content', $content);
} else {
return $DB->insert_record('data_content', $content);
}
}
function get_sort_sql($fieldname) {
global $DB;
return $DB->sql_cast_char2real($fieldname, true);
}
function export_text_value($record) {
// The content here is from the database and does not require location formating.
return sprintf('%01.4f', $record->content) . ' ' . sprintf('%01.4f', $record->content1);
}
}