308 lines
12 KiB
PHP
308 lines
12 KiB
PHP
<?php
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/*
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Plugin Name: Freifunk Metadata Shortcodes
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Plugin URI: http://mschuette.name/
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Description: Defines shortcodes to display Freifunk metadata
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Version: 0.2
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Author: Martin Schuette
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Author URI: http://mschuette.name/
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*/
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define('FF_META_DEFAULT_CACHETIME', 15);
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define('FF_META_DEFAULT_DIR', 'https://raw.githubusercontent.com/freifunk/directory.api.freifunk.net/master/directory.json');
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define('FF_META_DEFAULT_CITY', 'hamburg');
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/* gets metadata from URL, handles caching */
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function ff_meta_getmetadata ($url) {
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$url_hash = hash('crc32', $url);
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// Caching
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if ( false === ( $metajson = get_transient( "ff_metadata_${url_hash}" ) ) ) {
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$metajson = wp_remote_retrieve_body( wp_remote_get($url) );
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$cachetime = get_option( 'ff_meta_cachetime', FF_META_DEFAULT_CACHETIME) * MINUTE_IN_SECONDS;
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set_transient( "ff_metadata_${url_hash}", $metajson, $cachetime );
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}
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$metadata = json_decode ( $metajson, $assoc = true );
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return $metadata;
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}
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if ( ! shortcode_exists( 'ff_state' ) ) {
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add_shortcode( 'ff_state', 'ff_meta_shortcode_handler');
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}
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if ( ! shortcode_exists( 'ff_services' ) ) {
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add_shortcode( 'ff_services', 'ff_meta_shortcode_handler');
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}
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if ( ! shortcode_exists( 'ff_contact' ) ) {
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add_shortcode( 'ff_contact', 'ff_meta_shortcode_handler');
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}
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if ( ! shortcode_exists( 'ff_location' ) ) {
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add_shortcode( 'ff_location', 'ff_meta_shortcode_handler');
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}
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// Example:
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// [ff_state]
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// [ff_state hamburg]
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function ff_meta_shortcode_handler( $atts, $content, $name ) {
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// $atts[0] holds the city name, if given
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if (empty($atts[0])) {
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$city = get_option( 'ff_meta_city', FF_META_DEFAULT_CITY );
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} else {
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$city = $atts[0];
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}
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if (false === ($directory = ff_meta_getmetadata ( FF_META_DEFAULT_DIR ))
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|| empty($directory[$city])) {
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return "<!-- FF Meta Error: cannot get directory.json, or no URL for '$city' -->\n";
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}
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$url = $directory[$city];
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if (false === ($metadata = ff_meta_getmetadata ($url))) {
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return "<!-- FF Meta Error: cannot get metadata from $url -->\n";
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}
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$outstr = "<div class=\"ff $name\">";
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switch ($name) {
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case 'ff_state':
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$state = $metadata['state'];
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$outstr .= sprintf('%s', $state['nodes']);
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break;
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case 'ff_location':
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// normal per-city code
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$loc = $metadata['location'];
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$loc_name = (isset($loc['address']) && isset($loc['address']['Name'])) ? $loc['address']['Name'] : '';
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$loc_street = (isset($loc['address']) && isset($loc['address']['Street'])) ? $loc['address']['Street'] : '';
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$loc_zip = (isset($loc['address']) && isset($loc['address']['Zipcode'])) ? $loc['address']['Zipcode'] : '';
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$loc_city = isset($loc['city']) ? $loc['city'] : '';
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$loc_lon = isset($loc['lon']) ? $loc['lon'] : '';
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$loc_lat = isset($loc['lat']) ? $loc['lat'] : '';
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if (empty($loc_name) || empty($loc_street) || empty($loc_zip)) {
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return '';
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}
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// TODO: style address + map as single box
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// TODO: once it is "ready" package openlayers.js into the plugin (cf. http://docs.openlayers.org/library/deploying.html)
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// TODO: handle missing values (i.e. only name & city)
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$outstr .= '<p>';
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$outstr .= sprintf('%s<br/>%s<br/>%s %s',
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$loc_name, $loc_street, $loc_zip, $loc_city);
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$outstr .= '</p>';
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// gather all location data
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if ( false === ( $json_locs = get_transient( "ff_metadata_json_locs" ) ) ) {
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$all_locs = array();
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$arr_select = array('lat' => 1, 'lon' => 1);
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foreach ($directory as $tmp_city => $url) {
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try {
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$tmp_meta = ff_meta_getmetadata($url);
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if (!empty($tmp_meta['location'])) {
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$tmp_loc = array_intersect_key($tmp_meta['location'], $arr_select);
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$all_locs[$tmp_city] = $tmp_loc;
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}
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} catch (Exception $e) {
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// pass
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}
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}
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$json_locs = json_encode($all_locs);
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$cachetime = get_option( 'ff_meta_cachetime', FF_META_DEFAULT_CACHETIME) * MINUTE_IN_SECONDS;
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set_transient( "ff_metadata_json_locs", $json_locs, $cachetime );
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}
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if ( !empty($loc_name) && !empty($loc_name) ) {
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$icon_url = plugin_dir_url(__FILE__) . "freifunk_marker.png";
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$outstr .= <<<EOT
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<div id="mapdiv_$loc_city" style="width: 75%; height: 15em;"></div>
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<style type="text/css"> <!--
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/* There seems to be a bug in OpenLayers' style.css (?). Original bottom:4.5em is far too high. */
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#OpenLayers_Control_Attribution_7 { bottom: 3px; }
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--></style>
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<script src="http://www.openlayers.org/api/OpenLayers.js"></script>
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<script>
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map = new OpenLayers.Map("mapdiv_$loc_city");
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map.addLayer(new OpenLayers.Layer.OSM());
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var lonLat = new OpenLayers.LonLat( $loc_lon, $loc_lat )
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.transform(
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new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
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map.getProjectionObject() // to Spherical Mercator Projection
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);
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var markers = new OpenLayers.Layer.Markers( "Markers" );
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map.addLayer(markers);
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markers.addMarker(new OpenLayers.Marker(lonLat));
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var size = new OpenLayers.Size(20,16);
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var offset = new OpenLayers.Pixel(0, -(size.h/2));
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var icon = new OpenLayers.Icon('$icon_url',size,offset);
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var ff_loc = $json_locs;
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delete ff_loc["$city"];
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for (key in ff_loc) {
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markers.addMarker(new OpenLayers.Marker(
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new OpenLayers.LonLat( ff_loc[key]['lon'], ff_loc[key]['lat'] )
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.transform(new OpenLayers.Projection("EPSG:4326"),map.getProjectionObject()),
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icon.clone()
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));
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}
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var zoom=12;
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map.setCenter (lonLat, zoom);
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</script>
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EOT;
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}
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break;
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case 'ff_services':
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$outstr .= '<ul>';
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if (isset($metadata['services'])) {
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$services = $metadata['services'];
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foreach ($services as $service) {
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$outstr .= sprintf('<li>%s (%s): <a href="%s">%s</a></li>',
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$service['serviceName'], $service['serviceDescription'],
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$service['internalUri'], $service['internalUri']);
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}
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}
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$outstr .= '</ul>';
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break;
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case 'ff_contact':
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$outstr .= '<p>';
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$contact = $metadata['contact'];
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// Output -- rather ugly but the data is not uniform, some fields are URIs, some are usernames, ...
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if (!empty($contact['email'])) {
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$outstr .= sprintf("E-Mail: <a href=\"mailto:%s\">%s</a><br />\n", $contact['email'], $contact['email']);
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}
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if (!empty($contact['ml'])) {
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$outstr .= sprintf("Mailingliste: <a href=\"mailto:%s\">%s</a><br />\n", $contact['ml'], $contact['ml']);
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}
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if (!empty($contact['irc'])) {
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$outstr .= sprintf("IRC: <a href=\"%s\">%s</a><br />\n", $contact['irc'], $contact['irc']);
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}
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if (!empty($contact['twitter'])) {
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// catch username instead of URI
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if ($contact['twitter'][0] === "@") {
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$twitter_url = 'http://twitter.com/'.ltrim($contact['twitter'], "@");
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$twitter_handle = $contact['twitter'];
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} else {
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$twitter_url = $contact['twitter'];
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$twitter_handle = '@' . substr($contact['twitter'], strrpos($contact['twitter'], '/') + 1);
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}
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$outstr .= sprintf("Twitter: <a href=\"%s\">%s</a><br />\n", $twitter_url, $twitter_handle);
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}
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if (!empty($contact['facebook'])) {
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$outstr .= sprintf("Facebook: <a href=\"%s\">%s</a><br />\n", $contact['facebook'], $contact['facebook']);
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}
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if (!empty($contact['googleplus'])) {
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$outstr .= sprintf("G+: <a href=\"%s\">%s</a><br />\n", $contact['googleplus'], $contact['googleplus']);
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}
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if (!empty($contact['jabber'])) {
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$outstr .= sprintf("XMPP: <a href=\"xmpp:%s\">%s</a><br />\n", $contact['jabber'], $contact['jabber']);
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}
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$outstr .= '</p>';
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break;
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default:
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return "";
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break;
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}
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// Output
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$outstr .= "</div>";
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return $outstr;
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}
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// Options Page:
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add_action( 'admin_menu', 'ff_meta_admin_menu' );
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function ff_meta_admin_menu() {
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add_options_page(
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'FF Meta Plugin', // page title
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'FF Meta', // menu title
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'manage_options', // req'd capability
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'ff_meta_plugin', // menu slug
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'ff_meta_options_page' // callback function
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);
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}
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add_action( 'admin_init', 'ff_meta_admin_init' );
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function ff_meta_admin_init() {
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register_setting(
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'ff_meta_settings-group', // group name
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'ff_meta_cachetime' // option name
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);
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register_setting(
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'ff_meta_settings-group', // group name
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'ff_meta_city' // option name
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);
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add_settings_section(
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'ff_meta_section-one', // ID
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'Section One', // Title
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'ff_meta_section_one_callback', // callback to fill
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'ff_meta_plugin' // page to display on
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);
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add_settings_field(
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'ff_meta_city', // ID
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'Default community', // Title
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'ff_meta_city_callback', // callback to fill field
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'ff_meta_plugin', // menu page=slug to display field on
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'ff_meta_section-one', // section to display the field in
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array('label_for' => 'ff_meta_city_id') // ID of input element
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);
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add_settings_field(
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'ff_meta_cachetime', // ID
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'Cache time', // Title
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'ff_meta_cachetime_callback', // callback to fill field
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'ff_meta_plugin', // menu page=slug to display field on
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'ff_meta_section-one', // section to display the field in
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array('label_for' => 'ff_meta_cachetime_id') // ID of input element
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);
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}
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function ff_meta_section_one_callback() {
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echo 'This Plugin provides shortcodes to display information from the Freifunk meta.json.';
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}
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function ff_meta_cachetime_callback() {
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$time = get_option( 'ff_meta_cachetime', FF_META_DEFAULT_CACHETIME );
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echo "<input type='number' name='ff_meta_cachetime' id='ff_meta_cachetime_id' class='small-text code' value='$time' /> minutes"
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."<p class='description'>Data from external URLs is cached for this number of minutes.</p>";
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}
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function ff_meta_city_callback() {
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if (false === ($directory = ff_meta_getmetadata ( FF_META_DEFAULT_DIR ))) {
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// TODO: error handling
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return;
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}
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$default_city = get_option( 'ff_meta_city', FF_META_DEFAULT_CITY );
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echo "<select name='ff_meta_city' id='ff_meta_city_id' size='1'>";
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foreach (array_keys($directory) as $city) {
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$prettycity = ucwords(str_replace(array('_', '-'), ' ', $city));
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$selected = selected( $default_city, $city );
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echo "<option value='$city' $selected>$prettycity</option>";
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}
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echo "</select>";
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echo "<p class='description'>This is the default city parameter.</p>";
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}
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function ff_meta_options_page() {
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?>
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<div class="wrap">
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<h2>Freifunk Meta Plugin Options</h2>
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<form action="options.php" method="POST">
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<?php settings_fields( 'ff_meta_settings-group' ); ?>
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<?php do_settings_sections( 'ff_meta_plugin' ); ?>
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<?php submit_button(); ?>
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</form>
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</div>
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<?php
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}
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register_uninstall_hook( __FILE__, 'ff_meta_uninstall_hook' );
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function ff_meta_uninstall_hook() {
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delete_option( 'ff_meta_city' );
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delete_option( 'ff_meta_cachetime' );
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}
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