diff --git a/admin/user-edit.php b/admin/user-edit.php
index 9e16df0..cd1f906 100644
--- a/admin/user-edit.php
+++ b/admin/user-edit.php
@@ -1,640 +1,656 @@
 <?php
 # Linux Day 2016 - single user edit page
-# Copyright (C) 2016, 2017, 2018, 2019 Valerio Bozzolan, Linux Day Torino
+# Copyright (C) 2016, 2017, 2018, 2019, 2020 Valerio Bozzolan, Linux Day Torino
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as published by
 # the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 require 'load.php';
 
 $user = null;
 
 if( isset( $_GET['uid'] ) ) {
 	$user = User::factoryFromUID( @ $_GET['uid'] )
 		->queryRow();
 
 	if( !$user ) {
 		die( "not found" );
 	}
 
 	if( !$user->hasPermissionToEditUser() ) {
 		error_die( "Can't edit user" );
 	}
 
 } else {
 
 	if( !has_permission( 'edit-users' ) ) {
 		error_die( "Can't create user" );
 	}
 
 }
 
 // register form submit action
 if( is_action( 'save-user' ) ) {
 
 	// avoid spaces
 	if( $_POST['email'] ) {
 		$_POST['email'] = luser_input( $_POST['email'], 32 );
 	}
 
 	// generate Gravatar
 	if( $_POST['email'] ) {
 		$_POST['gravatar'] = md5( $_POST['email'] );
 	}
 
 	// prepare data sent via POST
 	$data = [];
 	$data[] = new DBCol( User::NAME,          $_POST['name'],     's'     );
 	$data[] = new DBCol( User::SURNAME,       $_POST['surname'],  's'     );
 	$data[] = new DBCol( User::UID,           $_POST['uid'],      's'     );
 	$data[] = new DBCol( User::EMAIL,         $_POST['email'],    'snull' );
 	$data[] = new DBCol( User::WEBSITE,       $_POST['site'],     'snull' );
 	$data[] = new DBCol( User::IMAGE,         $_POST['image'],    'snull' );
 	$data[] = new DBCol( User::GRAVATAR,      $_POST['gravatar'], 'snull' );
 	$data[] = new DBCol( User::FACEBOOK,      $_POST['facebook'], 'snull' );
 	$data[] = new DBCol( User::LINKEDIN,      $_POST['linkedin'], 'snull' );
 	$data[] = new DBCol( User::GITHUB,        $_POST['github'],   'snull' );
 	$data[] = new DBCol( User::TWITTER,       $_POST['twitter'],  'snull' );
+	$data[] = new DBCol( User::META_WIKI,     $_POST['metawiki'], 'snull' );
 	$data[] = new DBCol( User::LOVED_LICENSE, $_POST['lovelicense'], 'snull' );
 
 	// for each language save the biography
 	foreach( all_languages() as $lang ) {
 
 		// generic column name in this language
 		$field = sprintf( 'user_bio_%s', $lang->getISO() );
 
 		// sent column value
 		$value = $_POST[ $field ] ?? null;
 
 		// prepare to be saved
 		$data[] = new DBCol( $field, $value, 'snull' );
 	}
 
 	// promote empty strings to null
 	foreach( $data as $row ) {
 		$row->promoteNULL();
 	}
 
 	if( $user ) {
 		// update existing user
 		User::factoryByID( $user->getUserID() )
 			->update( $data );
 	} else {
 		// insert a new User
 		User::factory()
 			->insertRow( $data );
 	}
 
 	$id = $user
 		? $user->getUserID()
 		: last_inserted_ID();
 
 	$user = User::factoryByID( $id )
 		->queryRow();
 
 	// POST -> redirect -> GET
 	http_redirect( $user->getUserEditURL(), 303 );
 }
 
 /**
  * Change the Image
  */
 if( $user && is_action( 'change-image' ) ) {
 
 	// prepare the image uploader
 	$image = new FileUploader( 'image', [
 		'category'          => 'image',
 		'override-filename' => "user-" . $user->getUserUID(),
 	] );
 
 	// prepare the image pathnames
 	$img_url  =                LATEST_CONFERENCE_UID . _ .  'images';
 	$img_path = ABSPATH . __ . LATEST_CONFERENCE_UID . __ . 'images';
 
 	// really upload that shitty image somewhere
 	if( $image->fileChoosed() ) {
 		$ok = $image->uploadTo( $img_path, $status, $filename, $ext );
 		if( $ok ) {
 
 			// now update
 			( new QueryUser() )
 				->whereUser( $user )
 				->update( [
 					'user_image' => $img_url . "/$filename.$ext",
 				] );
 
 			// POST-redirect-GET
 			http_redirect( $user->getUserEditURL(), 303 );
 
 		} else {
 			die( $image->getErrorMessage() );
 		}
 	}
 }
 
 // register action to create a Skill
 if( is_action( 'create-skill' ) && isset( $_POST['skill_title'], $_POST['skill_type'] ) ) {
 
 	// generate a Skill UID
 	$skill_uid = generate_slug( $_POST['skill_title'], 32 );
 
 	// check if already exists
 	$skill = ( new QuerySkill() )
 		->whereSkillUID( $skill_uid )
 		->queryRow();
 
 	// create the Skill
 	if( !$skill ) {
 		( new QuerySkill() )
 			->insertRow( [
 				'skill_uid'   => $skill_uid,
 				'skill_title' => $_POST['skill_title'],
 				'skill_type'  => $_POST['skill_type'],
 			] );
 	}
 
 }
 
 // register action to edit an existing Skill
 if( isset( $_POST['skill_uid'], $_POST['skill_score'] ) ) {
 
 	// find existing Skill
 	$skill = Skill::factoryFromUID( $_POST['skill_uid'] )
 		->queryRow();
 
 	// eventually create the Skill
 	if( !$skill ) {
 		( new QuerySkill() )
 			->insertRow( [
 				'skill_uid' => $_POST['skill_uid'],
 			] );
 
 		// retrieve last inserted Skill
 		$skill = ( new QuerySkill() )
 			->whereSkillID( last_inserted_ID() )
 			->queryRow();
 	}
 
 	// query the UserSkill
 	$query_userskill = ( new QueryUserSkill() )
 			->whereUser(  $user  )
 			->whereSkill( $skill );
 
 	// eventually change an existing skill
 	if( is_action( 'change-skill' ) ) {
 
 		// delete the Skill or just update?
 		if( isset( $_POST['skill_delete'] ) ) {
 
 			$query_userskill->delete();
 
 		} else {
 			// update the score
 			$query_userskill->update( [
 				'skill_score' => (int)$_POST['skill_score'],
 			] );
 		}
 	}
 
 	// eventually add a skill
 	if( is_action( 'add-skill' ) ) {
 
 		// eventually delete
 		$query_userskill->delete();
 
 		// then add the skill
 		( new QueryUserSkill() )
 			->insertRow( [
 				'user_ID'     => $user->getUserID(),
 				'skill_ID'    => $skill->getSkillID(),
 				'skill_score' => $_POST['skill_score'],
 			] );
 	}
 
 }
 
 // register action to delete the user
 if( $user && is_action( 'delete-user' ) ) {
 
 	// delete the user from the database
 	User::factory()
 		->whereInt( 'user_ID', $user->getUserID() )
 		->delete();
 
 	// POST -> redirect -> GET
 	http_redirect( $user->getUserEditURL(), 303 );
 }
 
 Header::spawn( null, [
 	'title' =>
 		$user
 			? sprintf(
 			  	__("Modifica %s"),
 			  	$user->getUserFullname()
 			  )
 			: __( "Aggiungi Utente" )
 	,
 ] );
 ?>
 
 	<?php if( $user ): ?>
 		<p><?= HTML::a(
 			$user->getUserURL(),
 			__( "Vedi" ) . icon('account_box', 'left')
 		) ?></p>
 	<?php endif ?>
 
 	<form method="post">
 		<?php form_action( 'save-user' ) ?>
 		<div class="row">
 
 			<!-- name -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-name"><?= __( "Nome" ) ?></label>
 						<input type="text" name="name" id="user-name"<?=
 							$user
 								? value( $user->get( User::NAME ) )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /name -->
 
 			<!-- surname -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-surname"><?= __( "Cognome" ) ?></label>
 						<input type="text" name="surname" id="user-surname"<?=
 							$user
 								? value( $user->get( User::SURNAME ) )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /surname -->
 
 			<!-- nickname -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-nickname"><?= __( "Nickname" ) ?></label>
 						<input type="text" name="uid" id="user-nickname"<?=
 							$user
 								? value( $user->getUserUID() )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /surname -->
 
 			<!-- e-mail -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-email"><?= __( "E-mail" ) ?></label>
 						<input type="text" name="email" id="user-email"<?=
 							$user
 								? value( $user->getUserEmail() )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /e-mail -->
 
 			<!-- gravatar -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-gravatar"><?= __( "Gravatar" ) ?></label>
 						<input type="text" name="gravatar" id="user-gravatar"<?=
 							$user && $user->hasUserGravatar()
 								? value( $user->getUserGravatarUID() )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /gravatar -->
 
 			<!-- website -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-website"><?= __( "Sito web" ) ?></label>
 						<input type="text" name="site" id="user-website"<?=
 							$user
 								? value( $user->get( User::WEBSITE ) )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /website -->
 
 			<!-- Facebook -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-facebook">Facebook</label>
 						<input type="text" name="facebook" id="user-facebook"<?=
 							$user
 								? value( $user->get( User::FACEBOOK ) )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /Facebook -->
 
 			<!-- Twitter -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-twitter">Twitter</label>
 						<input type="text" name="twitter" id="user-twitter"<?=
 							$user
 								? value( $user->get( User::TWITTER ) )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /Twitter ->
 
 			<!-- Linkedin -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-linkedin">Linkedin</label>
 						<input type="text" name="linkedin" id="user-linkedin"<?=
 							$user
 								? value( $user->get( User::LINKEDIN ) )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /Linkedin -->
 
 			<!-- GitHub -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-github">GitHub</label>
 						<input type="text" name="github" id="user-github"<?=
 							$user
 								? value( $user->get( User::GITHUB ) )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /GitHub -->
 
 			<!-- image -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<div class="input-field">
 						<label for="user-image"><?= __( "Immagine" ) ?></label>
 						<input type="text" name="image" id="user-image"<?=
 							$user
 								? value( $user->get( User::IMAGE ) )
 								: ''
 						?> />
 					</div>
 				</div>
 			</div>
 			<!-- /image -->
 
+			<!-- Meta-wiki -->
+			<div class="col s12 m6 l4">
+				<div class="card-panel">
+					<div class="input-field">
+						<label for="user-metawiki"><?= __( "Meta-wiki" ) ?></label>
+						<input type="text" name="metawiki" id="user-metawiki"<?=
+							$user
+								? value( $user->get( User::META_WIKI ) )
+								: ''
+						?> />
+					</div>
+				</div>
+			</div>
+			<!-- /Meta-wiki -->
+
 			<!-- license -->
 			<div class="col s12 m6 l4">
 				<div class="card-panel">
 					<label><?= __( "Licenza preferita" ) ?></label>
 					<select name="lovelicense">
 						<option value=""<?= selected( $user && !$user->hasUserLovelicense() ) ?>><?= __( "Nessuna" ) ?></option>
 						<?php foreach( Licenses::instance()->all() as $license ): ?>
 							<option<?php
 								// option value
 								echo value( $license->getCode() );
 
 								// option selected or not
 								if( $user ) {
 									echo selected( $license->getCode(), $user->get( 'user_lovelicense' ) );
 								}
 
 							?>><?= esc_html( $license->getShort() ) ?></option>
 						<?php endforeach ?>
 					</select>
 
 					<?php
 						if( $user && $user->hasUserLovelicense() ) {
 							echo $user->getUserLovelicense()->getLink();
 						}
 					?>
 				</div>
 			</div>
 			<!-- /license -->
 
 		</div>
 
 		<!-- bio -->
 		<div class="row">
 			<?php foreach( all_languages() as $lang ): ?>
 				<?php $field = sprintf( 'user_bio_%s', $lang->getISO() ) ?>
 				<div class="col s12">
 					<div class="card-panel">
 						<p><?= sprintf(
 							__( "Biografia (%s)" ),
 							$lang->getHuman()
 						) ?><?p>
 						<textarea name="<?= esc_attr( $field ) ?>" class="materialize-textarea"><?= esc_html(
 							$user
 								? $user->get( $field )
 								: ''
 						) ?></textarea>
 						<?php if( $user && $lang->getISO() === 'it' ): ?>
 							<p>Legacy description translated by the community:</p>
 							<textarea class="materialize-textarea" readonly="readonly"><?= esc_html( __( $user->get( $field ) ) ) ?></textarea>
 						<?php endif ?>
 					</div>
 				</div>
 			<?php endforeach ?>
 		</div>
 		<!-- bio -->
 
 		<button type="submit" class="btn"><?= __( "Salva" ) ?></button>
 	</form>
 
 	<!-- image -->
 	<?php if( $user ): ?>
 		<form method="post" enctype="multipart/form-data">
 			<?php form_action( 'change-image' ) ?>
 			<div class="row">
 				<div class="col s12">
 					<div class="card-panel">
 
 						<h3><?= __( "Nuova Immagine" ) ?></h3>
 
 						<div class="file-field input-field">
 							<div class="btn">
 								<span><?= __( "Sfoglia" ) ?></span>
 								<input name="image" type="file" />
 							</div>
 							<div class="file-path-wrapper">
 								<input class="file-path validate" type="text" />
 							</div>
 						</div>
 						<button type="submit" class="btn waves-effect"><?= __( "Carica" ) ?></button>
 					</div>
 				</div>
 			</div>
 		</form>
 	<?php endif ?>
 	<!-- /image -->
 
 	<!-- list Skill and Interest -->
 	<?php if( $user ): ?>
 		<?php $skills = $user->factoryUserSkills()
 			->queryGenerator();
 		?>
 		<?php if( $skills->valid() ): ?>
 			<h3><?php printf(
 				__( "Modifica %s" ),
 				__( "Skill" )
 			) ?></h3>
 			<div class="row">
 				<?php $i = 0; ?>
 				<?php foreach( $skills as $skill ): ?>
 					<div class="col s12 m4">
 						<div class="card-panel">
 							<form method="post">
 								<?php form_action( 'change-skill' ) ?>
 								<div class="row">
 									<div class="col s6">
 										<input type="text" name="skill_uid" value="<?= $skill->getSkillUID() ?>" />
 									</div>
 									<div class="col s6">
 										<input type="text" name="skill_score" value="<?= $skill->getSkillScore() ?>" />
 									</div>
 									<div class="col s6">
 										<input type="checkbox" name="skill_delete" value="yes" id="skill-<?= $i ?>" />
 										<label for="skill-<?= $i++ ?>"><?= __("Elimina") ?></label>
 									</div>
 									<div class="col s6">
 										<button type="submit" class="btn"><?= __("Salva") ?></button>
 									</div>
 									<div class="col s12">
 										<p><?= $skill->getSkillPhrase() ?></p>
 									</div>
 								</div>
 							</form>
 						</div>
 					</div>
 				<?php endforeach ?>
 			</div>
 		<?php endif ?>
 	<?php endif ?>
 	<!-- /list Skill and Interest -->
 
 	<!-- add Skill and Interest -->
 	<?php if( $user ): ?>
 		<h3><?php printf(
 			__( "Aggiungi %s"),
 			__( "Skill" )
 		) ?></h3>
 		<div class="row">
 			<div class="col s12 m4">
 				<div class="card-panel">
 					<form method="post">
 						<?php form_action( 'add-skill' ) ?>
 						<div class="row">
 							<div class="col s6">
 								<select name="skill_uid" class="browser-default" required="required">
 									<?php $skills = Skill::factory()
 										->orderBy('skill_uid')
 										->queryGenerator();
 									?>
 									<option name="" selected="" value="" disabled="disabled"></option>
 									<?php foreach( $skills as $skill ): ?>
 										<option value="<?= $skill->getSkillUID() ?>"><?= esc_html( $skill->getSkillUID() ) ?></option>
 									<?php endforeach ?>
 								</select>
 							</div>
 							<div class="col s6">
 								<input type="text" name="skill_score" value="0" />
 							</div>
 							<div class="col s6">
 								<button type="submit" class="btn"><?= __("Aggiungi") ?></button>
 							</div>
 						</div>
 					</form>
 				</div>
 			</div>
 		</div>
 	<?php endif ?>
 	<!-- /Add Skill and Interest -->
 
 	<?php if( $user ): ?>
 		<h3><?php printf(
 			__( "Crea %s"),
 			__( "Skill" )
 		) ?></h3>
 		<div class="row">
 			<div class="col s12 m4">
 				<div class="card-panel">
 					<form method="post">
 						<?php form_action( 'create-skill' ) ?>
 						<div class="row">
 							<div class="col s12 input-field">
 								<label for="new-skill-title" class="active"><?= __( "Titolo" ) ?></label>
 								<input id="new-skill-title" name="skill_title" required="required" />
 							</div>
 							<div class="col s12 input-field">
 								<select id="new-skill-type" name="skill_type" required="required" />
 									<option value="programming"><?= __( "Programmazione" ) ?></option>
 									<option value="interest"><?=    __( "Interesse"      ) ?></option>
 								</select>
 								<label for="new-skill-type"><?= __( "Tipo" ) ?></label>
 							</div>
 							<div class="col s12">
 								<button type="submit" class="btn"><?= __("Aggiungi") ?></button>
 							</div>
 						</div>
 					</form>
 				</div>
 			</div>
 		</div>
 	<?php endif ?>
 
 	<!-- delete -->
 	<?php if( $user ): ?>
 		<div class="row">
 			<div class="col s12">
 				<form method="post">
 					<?php form_action( 'delete-user' ) ?>
 					<button type="submit" class="btn waves-effect red right"><?= __( "Elimina" ) ?></button>
 				</form>
 			</div>
 		</div>
 	<?php endif ?>
 	<!-- /delete -->
 <?php
 
 Footer::spawn();
diff --git a/includes/class-User.php b/includes/class-User.php
index eec5580..78021bd 100644
--- a/includes/class-User.php
+++ b/includes/class-User.php
@@ -1,475 +1,475 @@
 <?php
 # Linux Day 2016 - Construct a database user
-# Copyright (C) 2016, 2017, 2018, 2019 Valerio Bozzolan, Linux Day Torino
+# Copyright (C) 2016, 2017, 2018, 2019, 2020 Valerio Bozzolan, Linux Day Torino
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as published by
 # the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 trait UserTrait {
 
 	/**
 	 * Get the user ID
 	 *
 	 * @return int
 	 */
 	public function getUserID() {
 		return $this->nonnull( User::ID );
 	}
 
 	/**
 	 * Get the user UID
 	 *
 	 * @return string
 	 */
 	public function getUserUID() {
 		return $this->get( User::UID );
 	}
 
 	/**
 	 * Get the user e-mail
 	 *
 	 * @return string
 	 */
 	public function getUserEmail() {
 		return $this->get( User::EMAIL );
 	}
 
 	/**
 	 * Check if the user is public
 	 *
 	 * @return bool
 	 */
 	public function isUserPublic() {
 		return $this->get( User::IS_PUBLIC );
 	}
 
 	/**
 	 * Check if I can see this user
 	 *
 	 * @return bool
 	 */
 	public function isUserVisible() {
 		return $this->isUserPublic() || $this->isUserMyself();
 	}
 
 	/**
 	 * Get the user full name
 	 *
 	 * @return string
 	 */
 	public function getUserFullname() {
 		return sprintf(
 			__("%s %s"),
 			$this->get( User::NAME ),
 			$this->get( User::SURNAME )
 		);
 	}
 
 	/**
 	 * Get the User URL
 	 *
 	 * The User URL is based on the CURRENT_CONFERENCE_UID.
 	 *
 	 * @param boolean $absolute Set to true to force an absolute URL
 	 * @return string
 	 */
 	public function getUserURL( $absolute = false ) {
 		$url = sprintf( PERMALINK_USER,
 			CURRENT_CONFERENCE_UID,
 			$this->getUserUID()
 		);
 		$url = site_page( $url, $absolute );
 		return keep_url_in_language( $url );
 	}
 
 	function getUserLink( $base = null, $html_class = null) {
 		$name = $this->getUserFullname();
 
 		return HTML::a(
 			$this->getUserURL( $base ),
 			esc_html( $name ),
 			sprintf( __("Profilo utente di %s"), $name ),
 			$html_class
 		);
 	}
 
 	/**
 	 * Check if the User has a Gravatar image
 	 *
 	 * @return int
 	 */
 	public function hasUserGravatar() {
 		return $this->has( User::GRAVATAR ) || $this->has( User::EMAIL );
 	}
 
 	/**
 	 * Get the md5 of the E-mail
 	 *
 	 * @return string|null
 	 */
 	public function getUserGravatarUID() {
 		return $this->get( User::GRAVATAR );
 	}
 
 	/**
 	 * Check if the User has an image
 	 *
 	 * @return boolean
 	 */
 	public function hasUserImage() {
 		return $this->has( User::IMAGE ) || $this->has( User::GRAVATAR );
 	}
 
 	/**
 	 * Get the URL of the user image
 	 *
 	 * @param  int     $size     Suggested width
 	 * @param  boolean $absolute Set true to force an absolute URL
 	 * @return string
 	 */
 	public function getUserImage( $size = 256, $absolute = false ) {
 		$image = $this->get( User::IMAGE );
 		if( ! $image ) {
 			$image = 'https://www.gravatar.com/avatar/' . $this->getUserGravatarUID() . '?s=' . $size;
 		}
 		return site_page( $image, $absolute );
 	}
 
 	/**
 	 * It has an user bio?
 	 *
 	 * @return bool
 	 */
 	public function hasUserBio() {
 		return null !== $this->get('user_bio');
 	}
 
 	function getUserBio() {
 		return $this->get('user_bio');
 	}
 
 	function getUserBioHTML($args = []) {
 		return Markdown::parse( __( $this->getUserBIO() ), $args);
 	}
 
 	/**
 	 * Check if the user is somehow social
 	 *
 	 * @return bool
 	 */
 	public function isUserSocial() {
 		foreach( User::allSocialFields() as $field ) {
 			if( $this->has( $field ) ) {
 				return true;
 			}
 		}
 		return false;
 	}
 
 	/**
 	 * Get the user Facebook profile URL
 	 *
 	 * @return string URL
 	 */
 	public function getUserFacebruck() {
 		return 'https://facebook.com/' . $this->get( User::FACEBOOK );
 	}
 
 	/**
 	 * Get the user Google+ profile URL
 	 *
 	 * @return string URL
 	 */
 	public function getUserGuggolpluz() {
 		return 'https://plus.google.com/' . $this->get( User::GOOGLE_PLUS );
 	}
 
 	/**
 	 * Get the user Twitter profile URL
 	 *
 	 * @return string URL
 	 */
 	public function getUserTuitt() {
 		return 'https://twitter.com/' . $this->get( User::TWITTER );
 	}
 
 	/**
 	 * Get the user Linkedin profile URL
 	 *
 	 * @return string URL
 	 */
 	public function getUserLinkeddon() {
 		return 'https://www.linkedin.com/in/' . $this->get( User::LINKEDIN );
 	}
 
 	/**
 	 * Get the user GitHub profile URL
 	 *
 	 * @return string URL
 	 */
 	public function getUserGithubbo() {
 		return 'https://github.com/' . $this->get( User::GITHUB );
 	}
 
 	/**
 	 * Get the user Wikimedia Meta-wiki URL
 	 *
 	 * @return string
 	 */
 	public function getUserMetaWikiURL() {
 		$username = $this->get( User::META_WIKI );
 		$username = str_replace( ' ', '_', $username );
 		return sprintf(
 			'https://meta.wikimedia.org/wiki/User:%s',
 			$username
 		);
 	}
 
 	/**
 	 * Get the edit URL to this user
 	 *
 	 * @return string
 	 */
 	public function getUserEditURL() {
 		$url = http_build_get_query( '2016/user-edit.php', [
 			'uid' => $this->getUserUID(),
 		] );
 		return site_page( $url );
 	}
 
 	/**
 	 * Can you edit this user?
 	 *
 	 * @return bool
 	 */
 	public function hasPermissionToEditUser() {
 		if( has_permission('edit-users') ) {
 			return true;
 		}
 		if( has_permission('edit-account') && $this->isUserMyself() ) {
 			return true;
 		}
 		return false;
 	}
 
 	/**
 	 * Is this user myself?
 	 *
 	 * @return bool
 	 */
 	public function isUserMyself() {
 		return is_logged() && get_user()->getUserID() === $this->getUserID();
 	}
 
 	/**
 	 * Check if the User has a loved license
 	 *
 	 * @return
 	 */
 	public function hasUserLovelicense() {
 		return $this->has( User::LOVED_LICENSE );
 	}
 
 	/**
 	 * Get the User loved license
 	 *
 	 * @return License
 	 */
 	public function getUserLovelicense() {
 		return license( $this->get( User::LOVED_LICENSE ) );
 	}
 
 	function factoryUserSkills() {
 		return UserSkill::factorySkillByUser( $this->getUserID() );
 	}
 
 	function factoryUserEvents() {
 		return FullEvent::factoryByUser( $this->getUserID() );
 	}
 
 	/**
 	 * Normalize a User object
 	 */
 	protected function normalizeUser() {
 		$this->integers( User::ID );
 		$this->booleans(
 			User::IS_PUBLIC,
 			User::IS_ACTIVE
 		);
 	}
 }
 
 class User extends Sessionuser {
 	use UserTrait;
 
 	/**
 	 * Name column
 	 */
 	const NAME = 'user_name';
 
 	/**
 	 * Aristocratic title column
 	 */
 	const ARISTOCRATIC_TITLE = 'user_title';
 
 	/**
 	 * ID column
 	 */
 	const SURNAME = 'user_surname';
 
 	/**
 	 * He/she public column
 	 */
 	const IS_PUBLIC = 'user_public';
 
 	/**
 	 * Image column
 	 */
 	const IMAGE = 'user_image';
 
 	/**
 	 * E-mail
 	 */
 	const EMAIL = 'user_email';
 
 	/**
 	 * Gravatar column
 	 */
 	const GRAVATAR = 'user_gravatar';
 
 	/**
 	 * RSS column
 	 */
 	const RSS = 'user_rss';
 
 	/**
 	 * Facebook username column
 	 */
 	const FACEBOOK = 'user_fb';
 
 	/**
 	 * Linkedin username column
 	 */
 	const LINKEDIN = 'user_lnkd';
 
 	/**
 	 * Google+ username column
 	 */
 	const GOOGLE_PLUS = 'user_googl';
 
 	/**
 	 * Twitter username
 	 */
 	const TWITTER = 'user_twtr';
 
 	/**
 	 * GitHub username
 	 */
 	const GITHUB = 'user_github';
 
 	/**
 	 * Personal website column
 	 */
 	const WEBSITE = 'user_site';
 
 	/**
 	 * Loved license column
 	 */
 	const LOVED_LICENSE = 'user_lovelicense';
 
 	/**
 	 * Biography column
 	 */
 	const BIO = 'user_bio';
 
 	/**
 	 * Username in Meta-wiki
 	 */
 	const META_WIKI = 'user_metawiki';
 
 	/**
 	 * Complete ID column name
 	 */
 	const ID_ = self::T . DOT . self::ID;
 
 	/**
 	 * Maximum UID length
 	 */
 	const MAXLEN_UID = 64;
 
 	/**
 	 * Constructor
 	 */
 	public function __construct() {
 		$this->normalizeUser();
 	}
 
 	/**
 	 * Get all the user social fields
 	 *
 	 * @return array
 	 */
 	public static function allSocialFields() {
 		return [
 			User::RSS,
 			User::FACEBOOK,
 			User::LINKEDIN,
 			User::GOOGLE_PLUS,
 			User::TWITTER,
 			User::GITHUB,
 			User::META_WIKI,
 		];
 	}
 
 	/**
 	 * Factory users by an event
 	 *
 	 * @param $event_ID int
 	 * @return Query
 	 */
 	public static function factoryByEvent( $event_ID ) {
 		return self::factory()
 			->from('event_user')
 			->equals('event_user.user_ID', 'user.user_ID')
 			->whereInt('event_user.event_ID', $event_ID );
 	}
 
 	/**
 	 * Generate the appropriate SELECT for the User Bio
 	 *
 	 * @return string
 	 */
 	public static function BIO_L10N() {
 		return i18n_coalesce( 'user_bio', 'user_bio_%s' );
 	}
 
 	/**
 	 * Get all the public User fields
 	 *
 	 * @return array
 	 */
 	public static function fields() {
 		return [
 			self::ID,
 			self::UID,
 			self::GRAVATAR,
 			self::NAME,
 			self::SURNAME,
 			self::IMAGE,
 			self::WEBSITE,
 			self::LOVED_LICENSE,
 			self::BIO_L10N(),
 		];
 	}
 
 }