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<?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, $formdata = null) {
global $CFG, $DB, $OUTPUT;
$lat = '';
$long = '';
if ($formdata) {
$fieldname = 'field_' . $this->field->id . '_0';
$lat = $formdata->$fieldname;
$fieldname = 'field_' . $this->field->id . '_1';
$long = $formdata->$fieldname;
} else 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 class="form-inline"><tr><td align="right">';
$classes = 'mod-data-input form-control-static';
$str .= '<label for="field_'.$this->field->id.'_0" class="' . $classes . '">' . get_string('latitude', 'data');
if ($this->field->required) {
$str .= $OUTPUT->pix_icon('req', get_string('requiredelement', 'form'));
}
$classes = 'form-control mx-1';
$str .= '</label></td><td>';
$str .= '<input class="' . $classes . '" type="text" name="field_'.$this->field->id.'_0" ';
$str .= ' id="field_'.$this->field->id.'_0" value="';
$str .= s($lat).'" size="10" />°N</td></tr>';
$classes = 'mod-data-input form-control-static';
$str .= '<tr><td align="right"><label for="field_'.$this->field->id.'_1" class="' . $classes . '">';
$str .= get_string('longitude', 'data');
if ($this->field->required) {
$str .= $OUTPUT->pix_icon('req', get_string('requiredelement', 'form'));
}
$classes = 'form-control mx-1';
$str .= '</label></td><td><input class="' . $classes . '" type="text" ';
$str .= 'name="field_'.$this->field->id.'_1" id="field_'.$this->field->id.'_1" value="';
$str .= s($long).'" size="10" />°E</td>';
$str .= '</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);
if ($latitude && $longitude) {
$options[$latlong->la . ',' . $latlong->lo] = $latitude . ' ' . $longitude;
}
}
$latlongsrs->close();
$classes = array('class' => 'accesshide');
$return = html_writer::label(get_string('latlong', 'data'), 'menuf_'.$this->field->id, false, $classes);
$classes = array('class' => 'custom-select');
$return .= html_writer::select($options, 'f_'.$this->field->id, $value, array('' => get_string('menuchoose', 'data')),
$classes);
return $return;
}
public function parse_search_field($defaults = null) {
$param = 'f_'.$this->field->id;
if (empty($defaults[$param])) {
$defaults = array($param => '');
}
return optional_param($param, $defaults[$param], 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>";
$str .= '<select id="jumpto" name="jumpto" class="custom-select">';
foreach($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" class="btn ml-1 btn-secondary" value="' . get_string('go');
$str .= '" onclick="if(previousSibling.value){self.location=previousSibling.value}"/>';
$str .= '</form>';
} else {
$str = "$compasslat, $compasslong";
}
return $str;
}
return false;
}
function update_content_import($recordid, $value, $name='') {
$values = explode(" ", $value, 2);
foreach ($values as $index => $value) {
$this->update_content($recordid, $value, $name . '_' . $index);
}
}
function update_content($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);
}
/**
* Check if a field from an add form is empty
*
* @param mixed $value
* @param mixed $name
* @return bool
*/
function notemptyfield($value, $name) {
return isset($value) && !($value == '');
}
/**
* Validate values for this field.
* Both the Latitude and the Longitude fields need to be filled in.
*
* @param array $values The entered values for the lat. and long.
* @return string|bool Error message or false.
*/
public function field_validation($values) {
$valuecount = 0;
// The lat long class has two values that need to be checked.
foreach ($values as $value) {
if (isset($value->value) && !($value->value == '')) {
$valuecount++;
}
}
// If we have nothing filled in or both filled in then everything is okay.
if ($valuecount == 0 || $valuecount == 2) {
return false;
}
// If we get here then only one field has been filled in.
return get_string('latlongboth', 'data');
}
/**
* Return the plugin configs for external functions.
*
* @return array the list of config parameters
* @since Moodle 3.3
*/
public function get_config_for_external() {
// Return all the config parameters.
$configs = [];
for ($i = 1; $i <= 10; $i++) {
$configs["param$i"] = $this->field->{"param$i"};
}
return $configs;
}
}