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info@mschuette.name
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README.md
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README.md
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# Freifunk Metadata Wordpress Plugin
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A small Wordpress plugin to render Freifunk metadata.
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It reads (and caches) JSON input from a configured URL and provides shortcodes to output the data.
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Currently implemented are `[ff_services]` and `[ff_contact]`.
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freifunkmeta.php
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freifunkmeta.php
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<?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: 0.1
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Author: Martin Schuette
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Author URI: http://mschuette.name/
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*/
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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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set_transient( "ff_metadata_${url_hash}", $metajson, 1 * HOUR_IN_SECONDS );
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}
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$metadata = json_decode ( $metajson, $assoc = true );
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return $metadata;
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}
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if ( ! shortcode_exists( 'ff_services' ) ) {
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add_shortcode( 'ff_services', 'ff_meta_shortcode_services');
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}
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// Example:
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// [ff_services]
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// [ff_services url="http://meta.hamburg.freifunk.net/ffhh.json"]
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function ff_meta_shortcode_services( $atts ) {
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$default_url = get_option( 'ff_meta_url' );
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extract(shortcode_atts( array(
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'url' => $default_url,
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), $atts));
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$metadata = ff_meta_getmetadata ($url);
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$services = $metadata['services'];
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// Output
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$outstr = '<div class="ff ff_services"><ul>';
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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'], $service['internalUri']);
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}
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$outstr .= '</ul></div>';
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return $outstr;
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}
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if ( ! shortcode_exists( 'ff_contact' ) ) {
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add_shortcode( 'ff_contact', 'ff_meta_shortcode_contact');
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}
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// Example:
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// [ff_contact]
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// [ff_contact url="http://meta.hamburg.freifunk.net/ffhh.json"]
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function ff_meta_shortcode_contact( $atts ) {
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$default_url = get_option( 'ff_meta_url' );
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extract(shortcode_atts( array(
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'url' => $default_url,
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), $atts));
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$metadata = ff_meta_getmetadata ($url);
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$contact = $metadata['contact'];
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// Output -- rather ugly but the data is not uniform, some fields are URIs, some are usernames, ...
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$outstr = '<div class="ff ff_contact"><p>';
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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'], $contact['jabber']);
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}
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# maybe we do not want public phone numbers...
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#if (!empty($contact['phone'])) {
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# $outstr .= sprintf("Telephon: %s<br />\n", $contact['phone']);
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#}
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$outstr .= '</p></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_url' // 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_url', // ID
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'URL of meta.json', // Title
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'ff_meta_url_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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);
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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_url_callback() {
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$url = get_option( 'ff_meta_url' );
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echo "<input type='text' name='ff_meta_url' value='$url' />";
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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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