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<?php
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/**
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* The exif2gmap simply adds Google map and Maker depends on geotag(EXIF gpsdata) in your <a href=> listed jpeg on node.
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* Written by Takashi Ikebe (iktaka@gmail.com).
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*/
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$exif2gmap_debug=0;
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/**
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* Implementation of hook_help().
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*/
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function exif2gmap_help($path, $arg) {
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switch ($path) {
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case 'admin/help#exif2gmap':
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return '<p>'. t('Display exif2gmap functions.') .'</p>';
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break;
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case "admin/modules#description":
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return '<p>'. t('Control exif2gmap functions.') .'</p>';
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}
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}
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/**
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* Implementation of hook_perm().
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*/
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function exif2gmap_perm() {
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return array('access exif2gmap', 'administer exif2gmap');
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}
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function exif2gmap_admin_settings() {
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$form['exif2gmap'] = array(
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'#type' => 'fieldset',
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'#title' => t('exif2gmap settings'),
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'#description' => t('Create the google map and marker use geotag infomation in exif.'),
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);
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$form['exif2gmap']['exif2gmap_valid'] = array(
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'#type' => 'checkbox',
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'#title' => t('Enable exif2gmap filter'),
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'#return_value' => 1,
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'#default_value' => variable_get('exif2gmap_valid', 0),
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);
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$form['exif2gmap']['exif2gmap_MapKey'] = array(
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'#type' => 'textfield',
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'#title' => t('Google Map API Key'),
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'#default_value'=> variable_get('exif2gmap_MapKey', ''),
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'#size' => 50,
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'#maxlength' => 100,
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'#description' => t('Google Map API Key(http://code.google.com/apis/maps/)'),
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'#attributes' => NULL,
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'#required' => TRUE,
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);
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$form['exif2gmap']['exif2gmap_GMwidth'] = array(
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'#type' => 'textfield',
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'#title' => t('google map size(width)'),
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'#default_value'=> variable_get('exif2gmap_GMwidth', ''),
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'#size' => 10,
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'#maxlength' => 15,
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'#description' => t('Enter width of map size.(Like 600px)'),
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'#attributes' => NULL,
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'#required' => TRUE,
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);
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$form['exif2gmap']['exif2gmap_GMheight'] = array(
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'#type' => 'textfield',
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'#title' => t('google map size(height)'),
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'#default_value'=> variable_get('exif2gmap_GMheight', ''),
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'#size' => 10,
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'#maxlength' => 15,
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'#description' => t('Enter width of map size.(Like 400px)'),
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'#attributes' => NULL,
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'#required' => TRUE,
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);
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return system_settings_form($form);
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}
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/**
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* Implementation of hook_menu().
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*/
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function exif2gmap_menu() {
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$items = array();
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$items['admin/settings/exif2gmap'] = array(
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'title' => 'exif2gmap',
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'description' => 'Control which and where exif2gmap links should be active.',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('exif2gmap_admin_settings'),
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'access arguments' => array('administer exif2gmap'),
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'type' => MENU_NORMAL_ITEM,
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);
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return $items;
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}
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/**
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* Implementation of hook_filter(), which enables exif2gmap keyword automatic link.
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*/
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function exif2gmap_filter($op, $delta = 0, $format = -1, $text = '') {
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switch ($op) {
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case 'list':
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return array(
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0 => t('exif2gmap'),
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);
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case 'no cache':
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switch ($delta) {
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case 0:
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return 0;
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default:
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return 0;
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}
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case 'description':
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switch ($delta) {
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case 0:
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return t('Enable exif2gmap.');
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default:
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return;
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}
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case 'process':
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switch ($delta) {
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case 0:
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if(($text != NULL)&&variable_get('exif2gmap_valid','')){
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$temp= exif2gmap_process($text, $format);
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if($temp == NULL){
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return $text;
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}
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return $temp;
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}
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default:
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return $text;
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}
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case 'settings':
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switch ($delta) {
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case 0:
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return exif2gmap_admin_settings($format);
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default:
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return;
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}
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default:
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return $text;
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}
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}
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function get_gpsdata($filename){
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if($exif2gmap_debug){
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drupal_set_message("get_gpsdata called ". $filename);
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}
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$exif = exif_read_data($filename,'COMPUTED');
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if($exif==FALSE){
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if($exif2gmap_debug){
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drupal_set_message("get_gpsdata failed\n");
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}
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}
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if($exif2gmap_debug){
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drupal_set_message("exif=". print_r($exif));
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}
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$GPS=array();
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foreach ($exif as $key=>$value)
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{
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if($key == 'GPSLatitudeRef'){
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$GPS['GPSLatitudeRef']=$value;
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}
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if($key == 'GPSLongitudeRef' ){
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$GPS['GPSLongitudeRef']=$value;
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}
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if($key == 'GPSLatitude'){
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$GPS['GPSLatitude']=$value;
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}
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if($key == 'GPSLongitude'){
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$GPS['GPSLongitude']=$value;
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}
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}
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if(isset($GPS['GPSLatitude'])){
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return $GPS;
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}
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return NULL;
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}
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function get_xxxitude( $gps, $type = 'lat' ) {
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$prefix = array( 'N' => '', 'S' => '-', 'E' => '', 'W' => '-' );
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$num = $type != 'lon' ? 'GPSLatitude' : 'GPSLongitude';
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$ref = $num . 'Ref';
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if ( ! isset( $gps[$ref] ) || ! isset( $prefix[$gps[$ref]] ) ) return '';
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if ( ! isset( $gps[$num] ) || ! is_array( $gps[$num] ) ) return '';
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$temp = array();
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foreach ( $gps[$num] as $expr ) eval("\$temp[] = $expr;");
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if($exif2gmap_debug){
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drupal_set_message($ref .":".$gps[$ref]. ":".$prefix[$gps[$ref]]);
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}
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$ret=$prefix[$gps[$ref]];
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$ret .= $temp[0]+($temp[1]/60)+($temp[2]/(60*60));
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return $ret;
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}
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/**
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* Core part of exif2gmap google map marker.
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*
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*/
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function exif2gmap_process($text, $format = -1) {
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//parse text in order to check gps exif.
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$mapkey=variable_get('exif2gmap_MapKey','');
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$width=variable_get('exif2gmap_GMwidth', '');
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$height=variable_get('exif2gmap_GMheight', '');
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$url = trim(url('<front>', array('absolute' => TRUE)),"/");
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$res=array();
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preg_match_all('/<a.*href=["\']([^"\']*)["\'][^>]*>(.*?)<\/a>/', $text, $res,PREG_SET_ORDER);
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$cnt=count($res);
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if($exif2gmap_debug){
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drupal_set_message($text);
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drupal_set_message(print_r($res));
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drupal_set_message("count=".$cnt);
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}
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$ans=array();
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$j=-1;
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for($i=0;$i<$cnt;$i++){
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$pos=strrpos($res[$i][1],'.');
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if($pos!=FALSE){
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$type=NULL;
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$type=strtolower(substr($res[$i][1],$pos+1,strlen($res[$i][1])));
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if($exif2gmap_debug){
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drupal_set_message("res=". $res[$i][1]. " type=" .$type);
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}
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if(strcmp($type,'jpg')!=0 && strcmp($type,'jpeg')!=0){
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//type is not jpeg..
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if($exif2gmap_debug){
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drupal_set_message("type is not jpeg". $type);
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}
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$gps=NULL;
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}else{
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//check basepath.
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$head=strtolower(substr($res[$i][1],0,4));
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if($exif2gmap_debug){
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drupal_set_message($head);
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}
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if(strcmp($head,"http")!=0){
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$fname=$url.$res[$i][1];
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}else{
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$fname=$res[$i][1];
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}
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$gps=get_gpsdata($fname);
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if($gps!=NULL){
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$j++;
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$ans[$j]=array();
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$ans[$j]['lat']=get_xxxitude( $gps, 'lat' );
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$ans[$j]['lon']=get_xxxitude( $gps, 'lon' );
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$ans[$j]['fpath']=$fname;
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$ans[$j]['tag']=$res[$i][0];
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}
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}
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}
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}
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if($exif2gmap_debug){
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drupal_set_message(print_r($ans));
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drupal_set_message("latnum=" .count($ans));
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drupal_set_message("gps=". print_r($gps));
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}
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//Map Center point.
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$Clat=0;
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$Clon=0;
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if(count($ans)==0){
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return $text;
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}
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$SW=260;
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$NE=-260;
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for($i=0;$i<count($ans);$i++){
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$Clat += $ans[$i]['lat'];
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$Clon += $ans[$i]['lon'];
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if(($ans[$i]['lat']+$ans[$i]['lon'])>$NE){
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$NE=$ans[$i]['lat']+$ans[$i]['lon'];
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$NElat=$ans[$i]['lat'];
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$NElon=$ans[$i]['lon'];
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}
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if(($ans[$i]['lat']+$ans[$i]['lon'])<$SW){
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$SW=$ans[$i]['lat']+$ans[$i]['lon'];
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$SWlat=$ans[$i]['lat'];
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$SWlon=$ans[$i]['lon'];
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}
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}
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$Clat=$Clat/count($ans);
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$Clon=$Clon/count($ans);
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if($exif2gmap_debug){
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drupal_set_message("Clat=" .$Clat." Clon=".$Clon);
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}
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//google map javascript maker...
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$digest=hash("sha256",$text);
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$script = 'var map; window.onload= function load(){ if (GBrowserIsCompatible()) {
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map = new GMap2(document.getElementById("map'.$digest.'"));
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';
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$script .= 'map.setCenter(new GLatLng(' .$Clat. ',' .$Clon. '), 7);
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';
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$script .= 'map.addControl(new GLargeMapControl());
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';
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$script .= 'var rectObj = new GLatLngBounds(new GLatLng('.$SWlat.','.$SWlon.'), new GLatLng('.$NElat.','.$NElon.'));';
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$script .= 'var zm = map.getBoundsZoomLevel(rectObj); map.setZoom(zm-1)';
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//Marker part.
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for($i=0;$i<count($ans);$i++){
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$script .= '
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var marker'.$i.'= new GMarker(new GLatLng(' .$ans[$i]['lat']. ',' .$ans[$i]['lon']. '));';
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$script .= 'GEvent.addListener(marker'.$i.', "mouseover", function(){';
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$tag=str_replace( '"','\'',$ans[$i]['tag']);
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$script .= 'marker'.$i.'.openInfoWindowHtml("' .$tag. '");});';
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$script .= 'map.addOverlay(marker'.$i.');';
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}
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$script .='}}';
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//inline coding..
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drupal_set_html_head('<script type="text/javascript" src="http://maps.google.com/maps?file=api&v=2&key='.$mapkey.'"></script>');
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drupal_add_js($script,'inline');
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//add div portion.
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$text .= '<br><div id="map'.$digest.'" style="width: '.$width.'; height: '.$height.'"></div>';
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return $text;
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}
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