Merge pull request #1248 from virtualtam/refactor/namespacing

Ensure all PHP classes are properly namespaced

36 files changed, 493 insertions, 400 deletions

diff --git a/application/ApplicationUtils.php b/application/ApplicationUtils.php
index a3b2dcb1..7fe3cb32 100644
--- a/application/ApplicationUtils.php
+++ b/application/ApplicationUtils.php
@@ -1,4 +1,9 @@
 <?php
+namespace Shaarli;
+
+use Exception;
+use Shaarli\Config\ConfigManager;
+
 /**
  * Shaarli (application) utilities
  */
@@ -51,7 +56,7 @@ class ApplicationUtils
                 return false;
             }
         } else {
-            if (! is_file($remote)) {
+            if (!is_file($remote)) {
                 return false;
             }
             $data = file_get_contents($remote);
@@ -97,7 +102,7 @@ class ApplicationUtils
         // Do not check versions for visitors
         // Do not check if the user doesn't want to
         // Do not check with dev version
-        if (! $isLoggedIn || empty($enableCheck) || $currentVersion === 'dev') {
+        if (!$isLoggedIn || empty($enableCheck) || $currentVersion === 'dev') {
             return false;
         }
 
@@ -111,7 +116,7 @@ class ApplicationUtils
             return false;
         }
 
-        if (! in_array($branch, self::$GIT_BRANCHES)) {
+        if (!in_array($branch, self::$GIT_BRANCHES)) {
             throw new Exception(
                 'Invalid branch selected for updates: "' . $branch . '"'
             );
@@ -123,7 +128,7 @@ class ApplicationUtils
             self::$GIT_URL . '/' . $branch . '/' . self::$VERSION_FILE
         );
 
-        if (! $latestVersion) {
+        if (!$latestVersion) {
             // Only update the file's modification date
             file_put_contents($updateFile, $currentVersion);
             return false;
@@ -152,9 +157,9 @@ class ApplicationUtils
         if (version_compare($curVersion, $minVersion) < 0) {
             $msg = t(
                 'Your PHP version is obsolete!'
-                 . ' Shaarli requires at least PHP %s, and thus cannot run.'
-                 . ' Your PHP version has known security vulnerabilities and should be'
-                 . ' updated as soon as possible.'
+                . ' Shaarli requires at least PHP %s, and thus cannot run.'
+                . ' Your PHP version has known security vulnerabilities and should be'
+                . ' updated as soon as possible.'
             );
             throw new Exception(sprintf($msg, $minVersion));
         }
@@ -174,50 +179,50 @@ class ApplicationUtils
 
         // Check script and template directories are readable
         foreach (array(
-            'application',
-            'inc',
-            'plugins',
-            $rainTplDir,
-            $rainTplDir.'/'.$conf->get('resource.theme'),
-        ) as $path) {
-            if (! is_readable(realpath($path))) {
-                $errors[] = '"'.$path.'" '. t('directory is not readable');
+                     'application',
+                     'inc',
+                     'plugins',
+                     $rainTplDir,
+                     $rainTplDir . '/' . $conf->get('resource.theme'),
+                 ) as $path) {
+            if (!is_readable(realpath($path))) {
+                $errors[] = '"' . $path . '" ' . t('directory is not readable');
             }
         }
 
         // Check cache and data directories are readable and writable
         foreach (array(
-            $conf->get('resource.thumbnails_cache'),
-            $conf->get('resource.data_dir'),
-            $conf->get('resource.page_cache'),
-            $conf->get('resource.raintpl_tmp'),
-        ) as $path) {
-            if (! is_readable(realpath($path))) {
-                $errors[] = '"'.$path.'" '. t('directory is not readable');
+                     $conf->get('resource.thumbnails_cache'),
+                     $conf->get('resource.data_dir'),
+                     $conf->get('resource.page_cache'),
+                     $conf->get('resource.raintpl_tmp'),
+                 ) as $path) {
+            if (!is_readable(realpath($path))) {
+                $errors[] = '"' . $path . '" ' . t('directory is not readable');
             }
-            if (! is_writable(realpath($path))) {
-                $errors[] = '"'.$path.'" '. t('directory is not writable');
+            if (!is_writable(realpath($path))) {
+                $errors[] = '"' . $path . '" ' . t('directory is not writable');
             }
         }
 
         // Check configuration files are readable and writable
         foreach (array(
-            $conf->getConfigFileExt(),
-            $conf->get('resource.datastore'),
-            $conf->get('resource.ban_file'),
-            $conf->get('resource.log'),
-            $conf->get('resource.update_check'),
-        ) as $path) {
-            if (! is_file(realpath($path))) {
+                     $conf->getConfigFileExt(),
+                     $conf->get('resource.datastore'),
+                     $conf->get('resource.ban_file'),
+                     $conf->get('resource.log'),
+                     $conf->get('resource.update_check'),
+                 ) as $path) {
+            if (!is_file(realpath($path))) {
                 # the file may not exist yet
                 continue;
             }
 
-            if (! is_readable(realpath($path))) {
-                $errors[] = '"'.$path.'" '. t('file is not readable');
+            if (!is_readable(realpath($path))) {
+                $errors[] = '"' . $path . '" ' . t('file is not readable');
             }
-            if (! is_writable(realpath($path))) {
-                $errors[] = '"'.$path.'" '. t('file is not writable');
+            if (!is_writable(realpath($path))) {
+                $errors[] = '"' . $path . '" ' . t('file is not writable');
             }
         }
 
diff --git a/application/FileUtils.php b/application/FileUtils.php
index b89ea12b..30560bfc 100644
--- a/application/FileUtils.php
+++ b/application/FileUtils.php
@@ -1,6 +1,8 @@
 <?php
 
-require_once 'exceptions/IOException.php';
+namespace Shaarli;
+
+use Shaarli\Exceptions\IOException;
 
 /**
  * Class FileUtils
@@ -44,7 +46,7 @@ class FileUtils
 
         return file_put_contents(
             $file,
-            self::$phpPrefix.base64_encode(gzdeflate(serialize($content))).self::$phpSuffix
+            self::$phpPrefix . base64_encode(gzdeflate(serialize($content))) . self::$phpSuffix
         );
     }
 
@@ -62,7 +64,7 @@ class FileUtils
     {
         // Note that gzinflate is faster than gzuncompress.
         // See: http://www.php.net/manual/en/function.gzdeflate.php#96439
-        if (! is_readable($file)) {
+        if (!is_readable($file)) {
             return $default;
         }
 
diff --git a/application/History.php b/application/History.php
index 35ec016a..a5846652 100644
--- a/application/History.php
+++ b/application/History.php
@@ -1,4 +1,8 @@
 <?php
+namespace Shaarli;
+
+use DateTime;
+use Exception;
 
 /**
  * Class History
@@ -66,7 +70,7 @@ class History
      * History constructor.
      *
      * @param string $historyFilePath History file path.
-     * @param int    $retentionTime   History content rentention time in seconds.
+     * @param int    $retentionTime   History content retention time in seconds.
      *
      * @throws Exception if something goes wrong.
      */
@@ -166,11 +170,11 @@ class History
      */
     protected function check()
     {
-        if (! is_file($this->historyFilePath)) {
+        if (!is_file($this->historyFilePath)) {
             FileUtils::writeFlatDB($this->historyFilePath, []);
         }
 
-        if (! is_writable($this->historyFilePath)) {
+        if (!is_writable($this->historyFilePath)) {
             throw new Exception(t('History file isn\'t readable or writable'));
         }
     }
@@ -191,7 +195,7 @@ class History
      */
     protected function write()
     {
-        $comparaison = new DateTime('-'. $this->retentionTime . ' seconds');
+        $comparaison = new DateTime('-' . $this->retentionTime . ' seconds');
         foreach ($this->history as $key => $value) {
             if ($value['datetime'] < $comparaison) {
                 unset($this->history[$key]);
diff --git a/application/Languages.php b/application/Languages.php
index b9c5d0e8..5cda802e 100644
--- a/application/Languages.php
+++ b/application/Languages.php
@@ -3,7 +3,6 @@
 namespace Shaarli;
 
 use Gettext\GettextTranslator;
-use Gettext\Merge;
 use Gettext\Translations;
 use Gettext\Translator;
 use Gettext\TranslatorInterface;
diff --git a/application/Router.php b/application/Router.php
index beb3165b..05877acd 100644
--- a/application/Router.php
+++ b/application/Router.php
@@ -1,4 +1,5 @@
 <?php
+namespace Shaarli;
 
 /**
  * Class Router
@@ -75,43 +76,43 @@ class Router
             return self::$PAGE_LINKLIST;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_LOGIN) && $loggedIn === false) {
+        if (startsWith($query, 'do=' . self::$PAGE_LOGIN) && $loggedIn === false) {
             return self::$PAGE_LOGIN;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_PICWALL)) {
+        if (startsWith($query, 'do=' . self::$PAGE_PICWALL)) {
             return self::$PAGE_PICWALL;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_TAGCLOUD)) {
+        if (startsWith($query, 'do=' . self::$PAGE_TAGCLOUD)) {
             return self::$PAGE_TAGCLOUD;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_TAGLIST)) {
+        if (startsWith($query, 'do=' . self::$PAGE_TAGLIST)) {
             return self::$PAGE_TAGLIST;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_OPENSEARCH)) {
+        if (startsWith($query, 'do=' . self::$PAGE_OPENSEARCH)) {
             return self::$PAGE_OPENSEARCH;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_DAILY)) {
+        if (startsWith($query, 'do=' . self::$PAGE_DAILY)) {
             return self::$PAGE_DAILY;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_FEED_ATOM)) {
+        if (startsWith($query, 'do=' . self::$PAGE_FEED_ATOM)) {
             return self::$PAGE_FEED_ATOM;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_FEED_RSS)) {
+        if (startsWith($query, 'do=' . self::$PAGE_FEED_RSS)) {
             return self::$PAGE_FEED_RSS;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_THUMBS_UPDATE)) {
+        if (startsWith($query, 'do=' . self::$PAGE_THUMBS_UPDATE)) {
             return self::$PAGE_THUMBS_UPDATE;
         }
 
-        if (startsWith($query, 'do='. self::$AJAX_THUMB_UPDATE)) {
+        if (startsWith($query, 'do=' . self::$AJAX_THUMB_UPDATE)) {
             return self::$AJAX_THUMB_UPDATE;
         }
 
@@ -120,23 +121,23 @@ class Router
             return self::$PAGE_LINKLIST;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_TOOLS)) {
+        if (startsWith($query, 'do=' . self::$PAGE_TOOLS)) {
             return self::$PAGE_TOOLS;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_CHANGEPASSWORD)) {
+        if (startsWith($query, 'do=' . self::$PAGE_CHANGEPASSWORD)) {
             return self::$PAGE_CHANGEPASSWORD;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_CONFIGURE)) {
+        if (startsWith($query, 'do=' . self::$PAGE_CONFIGURE)) {
             return self::$PAGE_CONFIGURE;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_CHANGETAG)) {
+        if (startsWith($query, 'do=' . self::$PAGE_CHANGETAG)) {
             return self::$PAGE_CHANGETAG;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_ADDLINK)) {
+        if (startsWith($query, 'do=' . self::$PAGE_ADDLINK)) {
             return self::$PAGE_ADDLINK;
         }
 
@@ -148,27 +149,27 @@ class Router
             return self::$PAGE_DELETELINK;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_PINLINK)) {
+        if (startsWith($query, 'do=' . self::$PAGE_PINLINK)) {
             return self::$PAGE_PINLINK;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_EXPORT)) {
+        if (startsWith($query, 'do=' . self::$PAGE_EXPORT)) {
             return self::$PAGE_EXPORT;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_IMPORT)) {
+        if (startsWith($query, 'do=' . self::$PAGE_IMPORT)) {
             return self::$PAGE_IMPORT;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_PLUGINSADMIN)) {
+        if (startsWith($query, 'do=' . self::$PAGE_PLUGINSADMIN)) {
             return self::$PAGE_PLUGINSADMIN;
         }
 
-        if (startsWith($query, 'do='. self::$PAGE_SAVE_PLUGINSADMIN)) {
+        if (startsWith($query, 'do=' . self::$PAGE_SAVE_PLUGINSADMIN)) {
             return self::$PAGE_SAVE_PLUGINSADMIN;
         }
 
-        if (startsWith($query, 'do='. self::$GET_TOKEN)) {
+        if (startsWith($query, 'do=' . self::$GET_TOKEN)) {
             return self::$GET_TOKEN;
         }
 
diff --git a/application/Thumbnailer.php b/application/Thumbnailer.php
index 37ed97a1..a23f98e9 100644
--- a/application/Thumbnailer.php
+++ b/application/Thumbnailer.php
@@ -3,9 +3,9 @@
 namespace Shaarli;
 
 use Shaarli\Config\ConfigManager;
+use WebThumbnailer\Application\ConfigManager as WTConfigManager;
 use WebThumbnailer\Exception\WebThumbnailerException;
 use WebThumbnailer\WebThumbnailer;
-use WebThumbnailer\Application\ConfigManager as WTConfigManager;
 
 /**
  * Class Thumbnailer
diff --git a/application/api/ApiMiddleware.php b/application/api/ApiMiddleware.php
index 66eac133..5ffb8c6d 100644
--- a/application/api/ApiMiddleware.php
+++ b/application/api/ApiMiddleware.php
@@ -1,9 +1,8 @@
 <?php
 namespace Shaarli\Api;
 
-use Shaarli\Api\Exceptions\ApiException;
 use Shaarli\Api\Exceptions\ApiAuthorizationException;
-
+use Shaarli\Api\Exceptions\ApiException;
 use Shaarli\Config\ConfigManager;
 use Slim\Container;
 use Slim\Http\Request;
@@ -127,7 +126,7 @@ class ApiMiddleware
      */
     protected function setLinkDb($conf)
     {
-        $linkDb = new \LinkDB(
+        $linkDb = new \Shaarli\Bookmark\LinkDB(
             $conf->get('resource.datastore'),
             true,
             $conf->get('privacy.hide_public_links'),
diff --git a/application/api/ApiUtils.php b/application/api/ApiUtils.php
index fc5ecaf1..1824b5d0 100644
--- a/application/api/ApiUtils.php
+++ b/application/api/ApiUtils.php
@@ -1,8 +1,8 @@
 <?php
 namespace Shaarli\Api;
 
-use Shaarli\Base64Url;
 use Shaarli\Api\Exceptions\ApiAuthorizationException;
+use Shaarli\Http\Base64Url;
 
 /**
  * REST API utilities
@@ -12,7 +12,7 @@ class ApiUtils
     /**
      * Validates a JWT token authenticity.
      *
-     * @param string $token JWT token extracted from the headers.
+     * @param string $token  JWT token extracted from the headers.
      * @param string $secret API secret set in the settings.
      *
      * @throws ApiAuthorizationException the token is not valid.
@@ -50,7 +50,7 @@ class ApiUtils
     /**
      * Format a Link for the REST API.
      *
-     * @param array $link Link data read from the datastore.
+     * @param array  $link     Link data read from the datastore.
      * @param string $indexUrl Shaarli's index URL (used for relative URL).
      *
      * @return array Link data formatted for the REST API.
diff --git a/application/api/controllers/ApiController.php b/application/api/controllers/ApiController.php
index 9edefcf6..a6e7cbab 100644
--- a/application/api/controllers/ApiController.php
+++ b/application/api/controllers/ApiController.php
@@ -2,8 +2,9 @@
 
 namespace Shaarli\Api\Controllers;
 
+use Shaarli\Bookmark\LinkDB;
 use Shaarli\Config\ConfigManager;
-use \Slim\Container;
+use Slim\Container;
 
 /**
  * Abstract Class ApiController
@@ -25,12 +26,12 @@ abstract class ApiController
     protected $conf;
 
     /**
-     * @var \LinkDB
+     * @var LinkDB
      */
     protected $linkDb;
 
     /**
-     * @var \History
+     * @var HistoryController
      */
     protected $history;
 
diff --git a/application/api/controllers/History.php b/application/api/controllers/HistoryController.php
index 4582e8b2..9afcfa26 100644
--- a/application/api/controllers/History.php
+++ b/application/api/controllers/HistoryController.php
@@ -14,7 +14,7 @@ use Slim\Http\Response;
  *
  * @package Shaarli\Api\Controllers
  */
-class History extends ApiController
+class HistoryController extends ApiController
 {
     /**
      * Service providing operation regarding Shaarli datastore and settings.
diff --git a/application/api/controllers/Tags.php b/application/api/controllers/Tags.php
index 6dd78750..82f3ef74 100644
--- a/application/api/controllers/Tags.php
+++ b/application/api/controllers/Tags.php
@@ -4,7 +4,6 @@ namespace Shaarli\Api\Controllers;
 
 use Shaarli\Api\ApiUtils;
 use Shaarli\Api\Exceptions\ApiBadParametersException;
-use Shaarli\Api\Exceptions\ApiLinkNotFoundException;
 use Shaarli\Api\Exceptions\ApiTagNotFoundException;
 use Slim\Http\Request;
 use Slim\Http\Response;
diff --git a/application/api/exceptions/ApiLinkNotFoundException.php b/application/api/exceptions/ApiLinkNotFoundException.php
index c727f4f0..7c2bb56e 100644
--- a/application/api/exceptions/ApiLinkNotFoundException.php
+++ b/application/api/exceptions/ApiLinkNotFoundException.php
@@ -2,8 +2,6 @@
 
 namespace Shaarli\Api\Exceptions;
 
-use Slim\Http\Response;
-
 /**
  * Class ApiLinkNotFoundException
  *
diff --git a/application/api/exceptions/ApiTagNotFoundException.php b/application/api/exceptions/ApiTagNotFoundException.php
index eee152fe..66ace8bf 100644
--- a/application/api/exceptions/ApiTagNotFoundException.php
+++ b/application/api/exceptions/ApiTagNotFoundException.php
@@ -2,8 +2,6 @@
 
 namespace Shaarli\Api\Exceptions;
 
-use Slim\Http\Response;
-
 /**
  * Class ApiTagNotFoundException
  *
diff --git a/application/LinkDB.php b/application/bookmark/LinkDB.php
index 4bbc2950..c13a1141 100644
--- a/application/LinkDB.php
+++ b/application/bookmark/LinkDB.php
@@ -1,4 +1,15 @@
 <?php
+
+namespace Shaarli\Bookmark;
+
+use ArrayAccess;
+use Countable;
+use DateTime;
+use Iterator;
+use Shaarli\Bookmark\Exception\LinkNotFoundException;
+use Shaarli\Exceptions\IOException;
+use Shaarli\FileUtils;
+
 /**
  * Data storage for links.
  *
@@ -108,6 +119,7 @@ class LinkDB implements Iterator, Countable, ArrayAccess
         $redirector = '',
         $redirectorEncode = true
     ) {
+    
         $this->datastore = $datastore;
         $this->loggedIn = $isLoggedIn;
         $this->hidePublicLinks = $hidePublicLinks;
@@ -137,7 +149,7 @@ class LinkDB implements Iterator, Countable, ArrayAccess
         if (!isset($value['id']) || empty($value['url'])) {
             die(t('Internal Error: A link should always have an id and URL.'));
         }
-        if (($offset !== null && ! is_int($offset)) || ! is_int($value['id'])) {
+        if (($offset !== null && !is_int($offset)) || !is_int($value['id'])) {
             die(t('You must specify an integer as a key.'));
         }
         if ($offset !== null && $offset !== $value['id']) {
@@ -247,31 +259,31 @@ class LinkDB implements Iterator, Countable, ArrayAccess
         $this->links = array();
         $link = array(
             'id' => 1,
-            'title'=> t('The personal, minimalist, super-fast, database free, bookmarking service'),
-            'url'=>'https://shaarli.readthedocs.io',
-            'description'=>t(
+            'title' => t('The personal, minimalist, super-fast, database free, bookmarking service'),
+            'url' => 'https://shaarli.readthedocs.io',
+            'description' => t(
                 'Welcome to Shaarli! This is your first public bookmark. '
-                .'To edit or delete me, you must first login.
+                . 'To edit or delete me, you must first login.
 
 To learn how to use Shaarli, consult the link "Documentation" at the bottom of this page.
 
 You use the community supported version of the original Shaarli project, by Sebastien Sauvage.'
             ),
-            'private'=>0,
-            'created'=> new DateTime(),
-            'tags'=>'opensource software'
+            'private' => 0,
+            'created' => new DateTime(),
+            'tags' => 'opensource software'
         );
         $link['shorturl'] = link_small_hash($link['created'], $link['id']);
         $this->links[1] = $link;
 
         $link = array(
             'id' => 0,
-            'title'=> t('My secret stuff... - Pastebin.com'),
-            'url'=>'http://sebsauvage.net/paste/?8434b27936c09649#bR7XsXhoTiLcqCpQbmOpBi3rq2zzQUC5hBI7ZT1O3x8=',
-            'description'=> t('Shhhh! I\'m a private link only YOU can see. You can delete me too.'),
-            'private'=>1,
-            'created'=> new DateTime('1 minute ago'),
-            'tags'=>'secretstuff',
+            'title' => t('My secret stuff... - Pastebin.com'),
+            'url' => 'http://sebsauvage.net/paste/?8434b27936c09649#bR7XsXhoTiLcqCpQbmOpBi3rq2zzQUC5hBI7ZT1O3x8=',
+            'description' => t('Shhhh! I\'m a private link only YOU can see. You can delete me too.'),
+            'private' => 1,
+            'created' => new DateTime('1 minute ago'),
+            'tags' => 'secretstuff',
         );
         $link['shorturl'] = link_small_hash($link['created'], $link['id']);
         $this->links[0] = $link;
@@ -297,7 +309,7 @@ You use the community supported version of the original Shaarli project, by Seba
 
         $toremove = array();
         foreach ($this->links as $key => &$link) {
-            if (! $this->loggedIn && $link['private'] != 0) {
+            if (!$this->loggedIn && $link['private'] != 0) {
                 // Transition for not upgraded databases.
                 unset($this->links[$key]);
                 continue;
@@ -307,7 +319,7 @@ You use the community supported version of the original Shaarli project, by Seba
             sanitizeLink($link);
 
             // Remove private tags if the user is not logged in.
-            if (! $this->loggedIn) {
+            if (!$this->loggedIn) {
                 $link['tags'] = preg_replace('/(^|\s+)\.[^($|\s)]+\s*/', ' ', $link['tags']);
             }
 
@@ -324,10 +336,10 @@ You use the community supported version of the original Shaarli project, by Seba
             }
 
             // To be able to load links before running the update, and prepare the update
-            if (! isset($link['created'])) {
+            if (!isset($link['created'])) {
                 $link['id'] = $link['linkdate'];
                 $link['created'] = DateTime::createFromFormat(self::LINK_DATE_FORMAT, $link['linkdate']);
-                if (! empty($link['updated'])) {
+                if (!empty($link['updated'])) {
                     $link['updated'] = DateTime::createFromFormat(self::LINK_DATE_FORMAT, $link['updated']);
                 }
                 $link['shorturl'] = smallHash($link['linkdate']);
@@ -413,12 +425,12 @@ You use the community supported version of the original Shaarli project, by Seba
     /**
      * Filter links according to search parameters.
      *
-     * @param array  $filterRequest Search request content. Supported keys:
+     * @param array  $filterRequest  Search request content. Supported keys:
      *                                - searchtags: list of tags
      *                                - searchterm: term search
-     * @param bool   $casesensitive Optional: Perform case sensitive filter
-     * @param string $visibility    return only all/private/public links
-     * @param string $untaggedonly  return only untagged links
+     * @param bool   $casesensitive  Optional: Perform case sensitive filter
+     * @param string $visibility     return only all/private/public links
+     * @param bool   $untaggedonly   return only untagged links
      *
      * @return array filtered links, all links if no suitable filter was provided.
      */
@@ -428,6 +440,7 @@ You use the community supported version of the original Shaarli project, by Seba
         $visibility = 'all',
         $untaggedonly = false
     ) {
+    
         // Filter link database according to parameters.
         $searchtags = isset($filterRequest['searchtags']) ? escape($filterRequest['searchtags']) : '';
         $searchterm = isset($filterRequest['searchterm']) ? escape($filterRequest['searchterm']) : '';
@@ -443,8 +456,8 @@ You use the community supported version of the original Shaarli project, by Seba
     /**
      * Returns the list tags appearing in the links with the given tags
      *
-     * @param array $filteringTags tags selecting the links to consider
-     * @param string $visibility   process only all/private/public links
+     * @param array  $filteringTags tags selecting the links to consider
+     * @param string $visibility    process only all/private/public links
      *
      * @return array tag => linksCount
      */
diff --git a/application/LinkFilter.php b/application/bookmark/LinkFilter.php
index 8f147974..9b966307 100644
--- a/application/LinkFilter.php
+++ b/application/bookmark/LinkFilter.php
@@ -1,5 +1,10 @@
 <?php
 
+namespace Shaarli\Bookmark;
+
+use Exception;
+use Shaarli\Bookmark\Exception\LinkNotFoundException;
+
 /**
  * Class LinkFilter.
  *
@@ -10,22 +15,22 @@ class LinkFilter
     /**
      * @var string permalinks.
      */
-    public static $FILTER_HASH   = 'permalink';
+    public static $FILTER_HASH = 'permalink';
 
     /**
      * @var string text search.
      */
-    public static $FILTER_TEXT   = 'fulltext';
+    public static $FILTER_TEXT = 'fulltext';
 
     /**
      * @var string tag filter.
      */
-    public static $FILTER_TAG    = 'tags';
+    public static $FILTER_TAG = 'tags';
 
     /**
      * @var string filter by day.
      */
-    public static $FILTER_DAY    = 'FILTER_DAY';
+    public static $FILTER_DAY = 'FILTER_DAY';
 
     /**
      * @var string Allowed characters for hashtags (regex syntax).
@@ -58,7 +63,7 @@ class LinkFilter
      */
     public function filter($type, $request, $casesensitive = false, $visibility = 'all', $untaggedonly = false)
     {
-        if (! in_array($visibility, ['all', 'public', 'private'])) {
+        if (!in_array($visibility, ['all', 'public', 'private'])) {
             $visibility = 'all';
         }
 
@@ -117,7 +122,7 @@ class LinkFilter
         foreach ($this->links as $key => $value) {
             if ($value['private'] && $visibility === 'private') {
                 $out[$key] = $value;
-            } elseif (! $value['private'] && $visibility === 'public') {
+            } elseif (!$value['private'] && $visibility === 'public') {
                 $out[$key] = $value;
             }
         }
@@ -132,7 +137,7 @@ class LinkFilter
      *
      * @return array $filtered array containing permalink data.
      *
-     * @throws LinkNotFoundException if the smallhash doesn't match any link.
+     * @throws \Shaarli\Bookmark\Exception\LinkNotFoundException if the smallhash doesn't match any link.
      */
     private function filterSmallHash($smallHash)
     {
@@ -169,7 +174,7 @@ class LinkFilter
      *  - see https://github.com/shaarli/Shaarli/issues/75 for examples
      *
      * @param string $searchterms search query.
-     * @param string $visibility Optional: return only all/private/public links.
+     * @param string $visibility  Optional: return only all/private/public links.
      *
      * @return array search results.
      */
@@ -207,7 +212,7 @@ class LinkFilter
         foreach ($this->links as $id => $link) {
             // ignore non private links when 'privatonly' is on.
             if ($visibility !== 'all') {
-                if (! $link['private'] && $visibility === 'private') {
+                if (!$link['private'] && $visibility === 'private') {
                     continue;
                 } elseif ($link['private'] && $visibility === 'public') {
                     continue;
@@ -250,7 +255,9 @@ class LinkFilter
 
     /**
      * generate a regex fragment out of a tag
+     *
      * @param string $tag to to generate regexs from. may start with '-' to negate, contain '*' as wildcard
+     *
      * @return string generated regex fragment
      */
     private static function tag2regex($tag)
@@ -334,7 +341,7 @@ class LinkFilter
             // check level of visibility
             // ignore non private links when 'privateonly' is on.
             if ($visibility !== 'all') {
-                if (! $link['private'] && $visibility === 'private') {
+                if (!$link['private'] && $visibility === 'private') {
                     continue;
                 } elseif ($link['private'] && $visibility === 'public') {
                     continue;
@@ -377,7 +384,7 @@ class LinkFilter
         $filtered = [];
         foreach ($this->links as $key => $link) {
             if ($visibility !== 'all') {
-                if (! $link['private'] && $visibility === 'private') {
+                if (!$link['private'] && $visibility === 'private') {
                     continue;
                 } elseif ($link['private'] && $visibility === 'public') {
                     continue;
@@ -406,7 +413,7 @@ class LinkFilter
      */
     public function filterDay($day)
     {
-        if (! checkDateFormat('Ymd', $day)) {
+        if (!checkDateFormat('Ymd', $day)) {
             throw new Exception('Invalid date format');
         }
 
@@ -440,14 +447,3 @@ class LinkFilter
         return preg_split('/\s+/', $tagsOut, -1, PREG_SPLIT_NO_EMPTY);
     }
 }
-
-class LinkNotFoundException extends Exception
-{
-    /**
-     * LinkNotFoundException constructor.
-     */
-    public function __construct()
-    {
-        $this->message =  t('The link you are trying to reach does not exist or has been deleted.');
-    }
-}
diff --git a/application/LinkUtils.php b/application/bookmark/LinkUtils.php
index d56e019f..de5b61cb 100644
--- a/application/LinkUtils.php
+++ b/application/bookmark/LinkUtils.php
@@ -1,11 +1,13 @@
 <?php
 
+use Shaarli\Bookmark\LinkDB;
+
 /**
  * Get cURL callback function for CURLOPT_WRITEFUNCTION
  *
  * @param string $charset     to extract from the downloaded page (reference)
  * @param string $title       to extract from the downloaded page (reference)
- * @param string $curlGetInfo Optionnaly overrides curl_getinfo function
+ * @param string $curlGetInfo Optionally overrides curl_getinfo function
  *
  * @return Closure
  */
@@ -196,7 +198,7 @@ function space2nbsp($text)
  *
  * @param string $description shaare's description.
  * @param string $redirector  if a redirector is set, use it to gerenate links.
- * @param bool   $urlEncode  Use `urlencode()` on the URL after the redirector or not.
+ * @param bool   $urlEncode   Use `urlencode()` on the URL after the redirector or not.
  * @param string $indexUrl    URL to Shaarli's index.
 
  * @return string formatted description.
diff --git a/application/bookmark/exception/LinkNotFoundException.php b/application/bookmark/exception/LinkNotFoundException.php
new file mode 100644
index 00000000..f9414428
--- /dev/null
+++ b/application/bookmark/exception/LinkNotFoundException.php
@@ -0,0 +1,15 @@
+<?php
+namespace Shaarli\Bookmark\Exception;
+
+use Exception;
+
+class LinkNotFoundException extends Exception
+{
+    /**
+     * LinkNotFoundException constructor.
+     */
+    public function __construct()
+    {
+        $this->message = t('The link you are trying to reach does not exist or has been deleted.');
+    }
+}
diff --git a/application/config/ConfigJson.php b/application/config/ConfigJson.php
index 8c8d5610..4509357c 100644
--- a/application/config/ConfigJson.php
+++ b/application/config/ConfigJson.php
@@ -47,7 +47,7 @@ class ConfigJson implements ConfigIO
         $print = defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
         $data = self::getPhpHeaders() . json_encode($conf, $print) . self::getPhpSuffix();
         if (!file_put_contents($filepath, $data)) {
-            throw new \IOException(
+            throw new \Shaarli\Exceptions\IOException(
                 $filepath,
                 t('Shaarli could not create the config file. '.
                   'Please make sure Shaarli has the right to write in the folder is it installed in.')
diff --git a/application/config/ConfigManager.php b/application/config/ConfigManager.php
index 32aaea48..e6c35073 100644
--- a/application/config/ConfigManager.php
+++ b/application/config/ConfigManager.php
@@ -207,7 +207,7 @@ class ConfigManager
      *
      * @throws MissingFieldConfigException: a mandatory field has not been provided in $conf.
      * @throws UnauthorizedConfigException: user is not authorize to change configuration.
-     * @throws \IOException: an error occurred while writing the new config file.
+     * @throws \Shaarli\Exceptions\IOException: an error occurred while writing the new config file.
      */
     public function write($isLoggedIn)
     {
diff --git a/application/config/ConfigPhp.php b/application/config/ConfigPhp.php
index 9625fe1a..cad34594 100644
--- a/application/config/ConfigPhp.php
+++ b/application/config/ConfigPhp.php
@@ -27,7 +27,7 @@ class ConfigPhp implements ConfigIO
     /**
      * Map legacy config keys with the new ones.
      * If ConfigPhp is used, getting <newkey> will actually look for <legacykey>.
-     * The Updater will use this array to transform keys when switching to JSON.
+     * The updater will use this array to transform keys when switching to JSON.
      *
      * @var array current key => legacy key.
      */
@@ -124,7 +124,7 @@ class ConfigPhp implements ConfigIO
         if (!file_put_contents($filepath, $configStr)
             || strcmp(file_get_contents($filepath), $configStr) != 0
         ) {
-            throw new \IOException(
+            throw new \Shaarli\Exceptions\IOException(
                 $filepath,
                 t('Shaarli could not create the config file. '.
                   'Please make sure Shaarli has the right to write in the folder is it installed in.')
diff --git a/application/exceptions/IOException.php b/application/exceptions/IOException.php
index 18e46b77..2aa25e5c 100644
--- a/application/exceptions/IOException.php
+++ b/application/exceptions/IOException.php
@@ -1,4 +1,7 @@
 <?php
+namespace Shaarli\Exceptions;
+
+use Exception;
 
 /**
  * Exception class thrown when a filesystem access failure happens
@@ -17,6 +20,6 @@ class IOException extends Exception
     {
         $this->path = $path;
         $this->message = empty($message) ? t('Error accessing') : $message;
-        $this->message .= ' "' . $this->path .'"';
+        $this->message .= ' "' . $this->path . '"';
     }
 }
diff --git a/application/Cache.php b/application/feed/Cache.php
index e5d43e61..e5d43e61 100644
--- a/application/Cache.php
+++ b/application/feed/Cache.php
diff --git a/application/CachedPage.php b/application/feed/CachedPage.php
index e11cc52d..d809bdd9 100644
--- a/application/CachedPage.php
+++ b/application/feed/CachedPage.php
@@ -1,4 +1,7 @@
 <?php
+
+namespace Shaarli\Feed;
+
 /**
  * Simple cache system, mainly for the RSS/ATOM feeds
  */
@@ -24,7 +27,7 @@ class CachedPage
     {
         // TODO: check write access to the cache directory
         $this->cacheDir = $cacheDir;
-        $this->filename = $this->cacheDir.'/'.sha1($url).'.cache';
+        $this->filename = $this->cacheDir . '/' . sha1($url) . '.cache';
         $this->shouldBeCached = $shouldBeCached;
     }
 
diff --git a/application/FeedBuilder.php b/application/feed/FeedBuilder.php
index 73fafcbe..b66f2f91 100644
--- a/application/FeedBuilder.php
+++ b/application/feed/FeedBuilder.php
@@ -1,4 +1,7 @@
 <?php
+namespace Shaarli\Feed;
+
+use DateTime;
 
 /**
  * FeedBuilder class.
@@ -28,7 +31,7 @@ class FeedBuilder
     public static $DEFAULT_NB_LINKS = 50;
 
     /**
-     * @var LinkDB instance.
+     * @var \Shaarli\Bookmark\LinkDB instance.
      */
     protected $linkDB;
 
@@ -38,12 +41,12 @@ class FeedBuilder
     protected $feedType;
 
     /**
-     * @var array $_SERVER.
+     * @var array $_SERVER
      */
     protected $serverInfo;
 
     /**
-     * @var array $_GET.
+     * @var array $_GET
      */
     protected $userInput;
 
@@ -75,11 +78,12 @@ class FeedBuilder
     /**
      * Feed constructor.
      *
-     * @param LinkDB  $linkDB        LinkDB instance.
-     * @param string  $feedType      Type of feed.
-     * @param array   $serverInfo    $_SERVER.
-     * @param array   $userInput     $_GET.
-     * @param boolean $isLoggedIn True if the user is currently logged in, false otherwise.
+     * @param \Shaarli\Bookmark\LinkDB $linkDB     LinkDB instance.
+     * @param string                   $feedType   Type of feed.
+     * @param array                    $serverInfo $_SERVER.
+     * @param array                    $userInput  $_GET.
+     * @param boolean                  $isLoggedIn True if the user is currently logged in,
+     *                                             false otherwise.
      */
     public function __construct($linkDB, $feedType, $serverInfo, $userInput, $isLoggedIn)
     {
@@ -124,7 +128,7 @@ class FeedBuilder
         $data['show_dates'] = !$this->hideDates || $this->isLoggedIn;
         // Remove leading slash from REQUEST_URI.
         $data['self_link'] = escape(server_url($this->serverInfo))
-                           . escape($this->serverInfo['REQUEST_URI']);
+            . escape($this->serverInfo['REQUEST_URI']);
         $data['index_url'] = $pageaddr;
         $data['usepermalinks'] = $this->usePermalinks === true;
         $data['links'] = $linkDisplayed;
@@ -142,18 +146,18 @@ class FeedBuilder
      */
     protected function buildItem($link, $pageaddr)
     {
-        $link['guid'] = $pageaddr .'?'. $link['shorturl'];
+        $link['guid'] = $pageaddr . '?' . $link['shorturl'];
         // Check for both signs of a note: starting with ? and 7 chars long.
         if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
             $link['url'] = $pageaddr . $link['url'];
         }
         if ($this->usePermalinks === true) {
-            $permalink = '<a href="'. $link['url'] .'" title="'. t('Direct link') .'">'. t('Direct link') .'</a>';
+            $permalink = '<a href="' . $link['url'] . '" title="' . t('Direct link') . '">' . t('Direct link') . '</a>';
         } else {
-            $permalink = '<a href="'. $link['guid'] .'" title="'. t('Permalink') .'">'. t('Permalink') .'</a>';
+            $permalink = '<a href="' . $link['guid'] . '" title="' . t('Permalink') . '">' . t('Permalink') . '</a>';
         }
-        $link['description']  = format_description($link['description'], '', false, $pageaddr);
-        $link['description'] .= PHP_EOL .'<br>&#8212; '. $permalink;
+        $link['description'] = format_description($link['description'], '', false, $pageaddr);
+        $link['description'] .= PHP_EOL . '<br>&#8212; ' . $permalink;
 
         $pubDate = $link['created'];
         $link['pub_iso_date'] = $this->getIsoDate($pubDate);
@@ -164,7 +168,6 @@ class FeedBuilder
             $link['up_iso_date'] = $this->getIsoDate($upDate, DateTime::ATOM);
         } else {
             $link['up_iso_date'] = $this->getIsoDate($pubDate, DateTime::ATOM);
-            ;
         }
 
         // Save the more recent item.
@@ -223,11 +226,11 @@ class FeedBuilder
     public function getTypeLanguage()
     {
         // Use the locale do define the language, if available.
-        if (! empty($this->locale) && preg_match('/^\w{2}[_\-]\w{2}/', $this->locale)) {
-            $length = ($this->feedType == self::$FEED_RSS) ? 5 : 2;
+        if (!empty($this->locale) && preg_match('/^\w{2}[_\-]\w{2}/', $this->locale)) {
+            $length = ($this->feedType === self::$FEED_RSS) ? 5 : 2;
             return str_replace('_', '-', substr($this->locale, 0, $length));
         }
-        return ($this->feedType == self::$FEED_RSS) ? 'en-en' : 'en';
+        return ($this->feedType === self::$FEED_RSS) ? 'en-en' : 'en';
     }
 
     /**
@@ -287,7 +290,7 @@ class FeedBuilder
         }
 
         $intNb = intval($this->userInput['nb']);
-        if (! is_int($intNb) || $intNb == 0) {
+        if (!is_int($intNb) || $intNb == 0) {
             return self::$DEFAULT_NB_LINKS;
         }
 
diff --git a/application/Base64Url.php b/application/http/Base64Url.php
index 54d0fcd5..33fa7c1f 100644
--- a/application/Base64Url.php
+++ b/application/http/Base64Url.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Shaarli;
+namespace Shaarli\Http;
 
 /**
  * URL-safe Base64 operations
diff --git a/application/HttpUtils.php b/application/http/HttpUtils.php
index 9c438160..2ea9195d 100644
--- a/application/HttpUtils.php
+++ b/application/http/HttpUtils.php
@@ -1,4 +1,7 @@
 <?php
+
+use Shaarli\Http\Url;
+
 /**
  * GET an HTTP URL to retrieve its content
  * Uses the cURL library or a fallback method
@@ -38,7 +41,7 @@ function get_http_response($url, $timeout = 30, $maxBytes = 4194304, $curlWriteF
     $cleanUrl = $urlObj->idnToAscii();
 
     if (!filter_var($cleanUrl, FILTER_VALIDATE_URL) || !$urlObj->isHttp()) {
-        return array(array(0 => 'Invalid HTTP Url'), false);
+        return array(array(0 => 'Invalid HTTP UrlUtils'), false);
     }
 
     $userAgent =
diff --git a/application/Url.php b/application/http/Url.php
index 3b7f19c2..90444a2f 100644
--- a/application/Url.php
+++ b/application/http/Url.php
@@ -1,91 +1,6 @@
 <?php
-/**
- * Converts an array-represented URL to a string
- *
- * Source: http://php.net/manual/en/function.parse-url.php#106731
- *
- * @see http://php.net/manual/en/function.parse-url.php
- *
- * @param array $parsedUrl an array-represented URL
- *
- * @return string the string representation of the URL
- */
-function unparse_url($parsedUrl)
-{
-    $scheme   = isset($parsedUrl['scheme']) ? $parsedUrl['scheme'].'://' : '';
-    $host     = isset($parsedUrl['host']) ? $parsedUrl['host'] : '';
-    $port     = isset($parsedUrl['port']) ? ':'.$parsedUrl['port'] : '';
-    $user     = isset($parsedUrl['user']) ? $parsedUrl['user'] : '';
-    $pass     = isset($parsedUrl['pass']) ? ':'.$parsedUrl['pass']  : '';
-    $pass     = ($user || $pass) ? "$pass@" : '';
-    $path     = isset($parsedUrl['path']) ? $parsedUrl['path'] : '';
-    $query    = isset($parsedUrl['query']) ? '?'.$parsedUrl['query'] : '';
-    $fragment = isset($parsedUrl['fragment']) ? '#'.$parsedUrl['fragment'] : '';
 
-    return "$scheme$user$pass$host$port$path$query$fragment";
-}
-
-/**
- * Removes undesired query parameters and fragments
- *
- * @param string url Url to be cleaned
- *
- * @return string the string representation of this URL after cleanup
- */
-function cleanup_url($url)
-{
-    $obj_url = new Url($url);
-    return $obj_url->cleanup();
-}
-
-/**
- * Get URL scheme.
- *
- * @param string url Url for which the scheme is requested
- *
- * @return mixed the URL scheme or false if none is provided.
- */
-function get_url_scheme($url)
-{
-    $obj_url = new Url($url);
-    return $obj_url->getScheme();
-}
-
-/**
- * Adds a trailing slash at the end of URL if necessary.
- *
- * @param string $url URL to check/edit.
- *
- * @return string $url URL with a end trailing slash.
- */
-function add_trailing_slash($url)
-{
-    return $url . (!endsWith($url, '/') ? '/' : '');
-}
-
-/**
- * Replace not whitelisted protocols by 'http://' from given URL.
- *
- * @param string $url       URL to clean
- * @param array  $protocols List of allowed protocols (aside from http(s)).
- *
- * @return string URL with allowed protocol
- */
-function whitelist_protocols($url, $protocols)
-{
-    if (startsWith($url, '?') || startsWith($url, '/')) {
-        return $url;
-    }
-    $protocols = array_merge(['http', 'https'], $protocols);
-    $protocol = preg_match('#^(\w+):/?/?#', $url, $match);
-    // Protocol not allowed: we remove it and replace it with http
-    if ($protocol === 1 && ! in_array($match[1], $protocols)) {
-        $url = str_replace($match[0], 'http://', $url);
-    } elseif ($protocol !== 1) {
-        $url = 'http://' . $url;
-    }
-    return $url;
-}
+namespace Shaarli\Http;
 
 /**
  * URL representation and cleanup utilities
@@ -182,7 +97,7 @@ class Url
         }
         return $input;
     }
-    
+
     /**
      * Returns a string representation of this URL
      */
@@ -196,7 +111,7 @@ class Url
      */
     protected function cleanupQuery()
     {
-        if (! isset($this->parts['query'])) {
+        if (!isset($this->parts['query'])) {
             return;
         }
 
@@ -224,7 +139,7 @@ class Url
      */
     protected function cleanupFragment()
     {
-        if (! isset($this->parts['fragment'])) {
+        if (!isset($this->parts['fragment'])) {
             return;
         }
 
@@ -257,7 +172,7 @@ class Url
     public function idnToAscii()
     {
         $out = $this->cleanup();
-        if (! function_exists('idn_to_ascii') || ! isset($this->parts['host'])) {
+        if (!function_exists('idn_to_ascii') || !isset($this->parts['host'])) {
             return $out;
         }
         $asciiHost = idn_to_ascii($this->parts['host'], 0, INTL_IDNA_VARIANT_UTS46);
@@ -291,7 +206,7 @@ class Url
     }
 
     /**
-     * Test if the Url is an HTTP one.
+     * Test if the UrlUtils is an HTTP one.
      *
      * @return true is HTTP, false otherwise.
      */
diff --git a/application/http/UrlUtils.php b/application/http/UrlUtils.php
new file mode 100644
index 00000000..4bc84b82
--- /dev/null
+++ b/application/http/UrlUtils.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * Converts an array-represented URL to a string
+ *
+ * Source: http://php.net/manual/en/function.parse-url.php#106731
+ *
+ * @see http://php.net/manual/en/function.parse-url.php
+ *
+ * @param array $parsedUrl an array-represented URL
+ *
+ * @return string the string representation of the URL
+ */
+function unparse_url($parsedUrl)
+{
+    $scheme   = isset($parsedUrl['scheme']) ? $parsedUrl['scheme'].'://' : '';
+    $host     = isset($parsedUrl['host']) ? $parsedUrl['host'] : '';
+    $port     = isset($parsedUrl['port']) ? ':'.$parsedUrl['port'] : '';
+    $user     = isset($parsedUrl['user']) ? $parsedUrl['user'] : '';
+    $pass     = isset($parsedUrl['pass']) ? ':'.$parsedUrl['pass']  : '';
+    $pass     = ($user || $pass) ? "$pass@" : '';
+    $path     = isset($parsedUrl['path']) ? $parsedUrl['path'] : '';
+    $query    = isset($parsedUrl['query']) ? '?'.$parsedUrl['query'] : '';
+    $fragment = isset($parsedUrl['fragment']) ? '#'.$parsedUrl['fragment'] : '';
+
+    return "$scheme$user$pass$host$port$path$query$fragment";
+}
+
+/**
+ * Removes undesired query parameters and fragments
+ *
+ * @param string url UrlUtils to be cleaned
+ *
+ * @return string the string representation of this URL after cleanup
+ */
+function cleanup_url($url)
+{
+    $obj_url = new \Shaarli\Http\Url($url);
+    return $obj_url->cleanup();
+}
+
+/**
+ * Get URL scheme.
+ *
+ * @param string url UrlUtils for which the scheme is requested
+ *
+ * @return mixed the URL scheme or false if none is provided.
+ */
+function get_url_scheme($url)
+{
+    $obj_url = new \Shaarli\Http\Url($url);
+    return $obj_url->getScheme();
+}
+
+/**
+ * Adds a trailing slash at the end of URL if necessary.
+ *
+ * @param string $url URL to check/edit.
+ *
+ * @return string $url URL with a end trailing slash.
+ */
+function add_trailing_slash($url)
+{
+    return $url . (!endsWith($url, '/') ? '/' : '');
+}
+
+/**
+ * Replace not whitelisted protocols by 'http://' from given URL.
+ *
+ * @param string $url       URL to clean
+ * @param array  $protocols List of allowed protocols (aside from http(s)).
+ *
+ * @return string URL with allowed protocol
+ */
+function whitelist_protocols($url, $protocols)
+{
+    if (startsWith($url, '?') || startsWith($url, '/')) {
+        return $url;
+    }
+    $protocols = array_merge(['http', 'https'], $protocols);
+    $protocol = preg_match('#^(\w+):/?/?#', $url, $match);
+    // Protocol not allowed: we remove it and replace it with http
+    if ($protocol === 1 && ! in_array($match[1], $protocols)) {
+        $url = str_replace($match[0], 'http://', $url);
+    } elseif ($protocol !== 1) {
+        $url = 'http://' . $url;
+    }
+    return $url;
+}
diff --git a/application/NetscapeBookmarkUtils.php b/application/netscape/NetscapeBookmarkUtils.php
index 84dd2b20..2fb1a4a6 100644
--- a/application/NetscapeBookmarkUtils.php
+++ b/application/netscape/NetscapeBookmarkUtils.php
@@ -1,9 +1,16 @@
 <?php
 
+namespace Shaarli\Netscape;
+
+use DateTime;
+use DateTimeZone;
+use Exception;
+use Katzgrau\KLogger\Logger;
 use Psr\Log\LogLevel;
+use Shaarli\Bookmark\LinkDB;
 use Shaarli\Config\ConfigManager;
+use Shaarli\History;
 use Shaarli\NetscapeBookmarkParser\NetscapeBookmarkParser;
-use Katzgrau\KLogger\Logger;
 
 /**
  * Utilities to import and export bookmarks using the Netscape format
@@ -31,8 +38,8 @@ class NetscapeBookmarkUtils
     public static function filterAndFormat($linkDb, $selection, $prependNoteUrl, $indexUrl)
     {
         // see tpl/export.html for possible values
-        if (! in_array($selection, array('all', 'public', 'private'))) {
-            throw new Exception(t('Invalid export selection:') .' "'.$selection.'"');
+        if (!in_array($selection, array('all', 'public', 'private'))) {
+            throw new Exception(t('Invalid export selection:') . ' "' . $selection . '"');
         }
 
         $bookmarkLinks = array();
@@ -84,7 +91,7 @@ class NetscapeBookmarkUtils
             $status .= vsprintf(
                 t(
                     'was successfully processed in %d seconds: '
-                    .'%d links imported, %d links overwritten, %d links skipped.'
+                    . '%d links imported, %d links overwritten, %d links skipped.'
                 ),
                 [$duration, $importCount, $overwriteCount, $skipCount]
             );
@@ -95,11 +102,11 @@ class NetscapeBookmarkUtils
     /**
      * Imports Web bookmarks from an uploaded Netscape bookmark dump
      *
-     * @param array         $post      Server $_POST parameters
-     * @param array         $files     Server $_FILES parameters
-     * @param LinkDB        $linkDb    Loaded LinkDB instance
-     * @param ConfigManager $conf      instance
-     * @param History       $history   History instance
+     * @param array         $post    Server $_POST parameters
+     * @param array         $files   Server $_FILES parameters
+     * @param LinkDB        $linkDb  Loaded LinkDB instance
+     * @param ConfigManager $conf    instance
+     * @param History       $history History instance
      *
      * @return string Summary of the bookmark import status
      */
@@ -115,7 +122,7 @@ class NetscapeBookmarkUtils
         }
 
         // Overwrite existing links?
-        $overwrite = ! empty($post['overwrite']);
+        $overwrite = !empty($post['overwrite']);
 
         // Add tags to all imported links?
         if (empty($post['default_tags'])) {
@@ -138,7 +145,7 @@ class NetscapeBookmarkUtils
         );
         $logger = new Logger(
             $conf->get('resource.data_dir'),
-            ! $conf->get('dev.debug') ? LogLevel::INFO : LogLevel::DEBUG,
+            !$conf->get('dev.debug') ? LogLevel::INFO : LogLevel::DEBUG,
             [
                 'prefix' => 'import.',
                 'extension' => 'log',
@@ -193,7 +200,7 @@ class NetscapeBookmarkUtils
             }
 
             // Add a new link - @ used for UNIX timestamps
-            $newLinkDate = new DateTime('@'.strval($bkm['time']));
+            $newLinkDate = new DateTime('@' . strval($bkm['time']));
             $newLinkDate->setTimezone(new DateTimeZone(date_default_timezone_get()));
             $newLink['created'] = $newLinkDate;
             $newLink['id'] = $linkDb->getNextId();
diff --git a/application/PluginManager.php b/application/plugin/PluginManager.php
index 1ed4db4b..f7b24a8e 100644
--- a/application/PluginManager.php
+++ b/application/plugin/PluginManager.php
@@ -1,4 +1,8 @@
 <?php
+namespace Shaarli\Plugin;
+
+use Shaarli\Config\ConfigManager;
+use Shaarli\Plugin\Exception\PluginFileNotFoundException;
 
 /**
  * Class PluginManager
@@ -9,12 +13,14 @@ class PluginManager
 {
     /**
      * List of authorized plugins from configuration file.
+     *
      * @var array $authorizedPlugins
      */
     private $authorizedPlugins;
 
     /**
      * List of loaded plugins.
+     *
      * @var array $loadedPlugins
      */
     private $loadedPlugins = array();
@@ -31,12 +37,14 @@ class PluginManager
 
     /**
      * Plugins subdirectory.
+     *
      * @var string $PLUGINS_PATH
      */
     public static $PLUGINS_PATH = 'plugins';
 
     /**
      * Plugins meta files extension.
+     *
      * @var string $META_EXT
      */
     public static $META_EXT = 'meta';
@@ -84,9 +92,9 @@ class PluginManager
     /**
      * Execute all plugins registered hook.
      *
-     * @param string        $hook   name of the hook to trigger.
-     * @param array         $data   list of data to manipulate passed by reference.
-     * @param array         $params additional parameters such as page target.
+     * @param string $hook   name of the hook to trigger.
+     * @param array  $data   list of data to manipulate passed by reference.
+     * @param array  $params additional parameters such as page target.
      *
      * @return void
      */
@@ -118,7 +126,7 @@ class PluginManager
      * @param string $pluginName plugin's name.
      *
      * @return void
-     * @throws PluginFileNotFoundException - plugin files not found.
+     * @throws \Shaarli\Plugin\Exception\PluginFileNotFoundException - plugin files not found.
      */
     private function loadPlugin($dir, $pluginName)
     {
@@ -204,8 +212,8 @@ class PluginManager
 
                 $metaData[$plugin]['parameters'][$param]['value'] = '';
                 // Optional parameter description in parameter.PARAM_NAME=
-                if (isset($metaData[$plugin]['parameter.'. $param])) {
-                    $metaData[$plugin]['parameters'][$param]['desc'] = t($metaData[$plugin]['parameter.'. $param]);
+                if (isset($metaData[$plugin]['parameter.' . $param])) {
+                    $metaData[$plugin]['parameters'][$param]['desc'] = t($metaData[$plugin]['parameter.' . $param]);
                 }
             }
         }
@@ -223,22 +231,3 @@ class PluginManager
         return $this->errors;
     }
 }
-
-/**
- * Class PluginFileNotFoundException
- *
- * Raise when plugin files can't be found.
- */
-class PluginFileNotFoundException extends Exception
-{
-    /**
-     * Construct exception with plugin name.
-     * Generate message.
-     *
-     * @param string $pluginName name of the plugin not found
-     */
-    public function __construct($pluginName)
-    {
-        $this->message = sprintf(t('Plugin "%s" files not found.'), $pluginName);
-    }
-}
diff --git a/application/plugin/exception/PluginFileNotFoundException.php b/application/plugin/exception/PluginFileNotFoundException.php
new file mode 100644
index 00000000..e5386f02
--- /dev/null
+++ b/application/plugin/exception/PluginFileNotFoundException.php
@@ -0,0 +1,23 @@
+<?php
+namespace Shaarli\Plugin\Exception;
+
+use Exception;
+
+/**
+ * Class PluginFileNotFoundException
+ *
+ * Raise when plugin files can't be found.
+ */
+class PluginFileNotFoundException extends Exception
+{
+    /**
+     * Construct exception with plugin name.
+     * Generate message.
+     *
+     * @param string $pluginName name of the plugin not found
+     */
+    public function __construct($pluginName)
+    {
+        $this->message = sprintf(t('Plugin "%s" files not found.'), $pluginName);
+    }
+}
diff --git a/application/PageBuilder.php b/application/render/PageBuilder.php
index 2ca95832..0569b67f 100644
--- a/application/PageBuilder.php
+++ b/application/render/PageBuilder.php
@@ -1,5 +1,11 @@
 <?php
 
+namespace Shaarli\Render;
+
+use Exception;
+use RainTPL;
+use Shaarli\ApplicationUtils;
+use Shaarli\Bookmark\LinkDB;
 use Shaarli\Config\ConfigManager;
 use Shaarli\Thumbnailer;
 
@@ -37,7 +43,9 @@ class PageBuilder
      */
     protected $token;
 
-    /** @var bool $isLoggedIn Whether the user is logged in **/
+    /**
+     * @var bool $isLoggedIn Whether the user is logged in
+     */
     protected $isLoggedIn = false;
 
     /**
@@ -101,7 +109,7 @@ class PageBuilder
             ApplicationUtils::getVersionHash(SHAARLI_VERSION, $this->conf->get('credentials.salt'))
         );
         $this->tpl->assign('index_url', index_url($_SERVER));
-        $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
+        $visibility = !empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
         $this->tpl->assign('visibility', $visibility);
         $this->tpl->assign('untaggedonly', !empty($_SESSION['untaggedonly']));
         $this->tpl->assign('pagetitle', $this->conf->get('general.title', 'Shaarli'));
@@ -126,7 +134,7 @@ class PageBuilder
         $this->tpl->assign('thumbnails_width', $this->conf->get('thumbnails.width'));
         $this->tpl->assign('thumbnails_height', $this->conf->get('thumbnails.height'));
 
-        if (! empty($_SESSION['warnings'])) {
+        if (!empty($_SESSION['warnings'])) {
             $this->tpl->assign('global_warnings', $_SESSION['warnings']);
             unset($_SESSION['warnings']);
         }
@@ -189,16 +197,16 @@ class PageBuilder
 
     /**
      * Render a 404 page (uses the template : tpl/404.tpl)
-     * usage : $PAGE->render404('The link was deleted')
+     * usage: $PAGE->render404('The link was deleted')
      *
-     * @param string $message A messate to display what is not found
+     * @param string $message A message to display what is not found
      */
     public function render404($message = '')
     {
         if (empty($message)) {
             $message = t('The page you are trying to reach does not exist or has been deleted.');
         }
-        header($_SERVER['SERVER_PROTOCOL'] .' '. t('404 Not Found'));
+        header($_SERVER['SERVER_PROTOCOL'] . ' ' . t('404 Not Found'));
         $this->tpl->assign('error_message', $message);
         $this->renderPage('404');
     }
diff --git a/application/ThemeUtils.php b/application/render/ThemeUtils.php
index 16f2f6a2..86096c64 100644
--- a/application/ThemeUtils.php
+++ b/application/render/ThemeUtils.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Shaarli;
+namespace Shaarli\Render;
 
 /**
  * Class ThemeUtils
diff --git a/application/Updater.php b/application/updater/Updater.php
index 6b94c5e3..f12e3516 100644
--- a/application/Updater.php
+++ b/application/updater/Updater.php
@@ -1,11 +1,24 @@
 <?php
+
+namespace Shaarli\Updater;
+
+use Exception;
+use RainTPL;
+use ReflectionClass;
+use ReflectionException;
+use ReflectionMethod;
+use Shaarli\ApplicationUtils;
+use Shaarli\Bookmark\LinkDB;
+use Shaarli\Bookmark\LinkFilter;
 use Shaarli\Config\ConfigJson;
-use Shaarli\Config\ConfigPhp;
 use Shaarli\Config\ConfigManager;
+use Shaarli\Config\ConfigPhp;
+use Shaarli\Exceptions\IOException;
 use Shaarli\Thumbnailer;
+use Shaarli\Updater\Exception\UpdaterException;
 
 /**
- * Class Updater.
+ * Class updater.
  * Used to update stuff when a new Shaarli's version is reached.
  * Update methods are ran only once, and the stored in a JSON file.
  */
@@ -83,12 +96,12 @@ class Updater
         }
 
         if ($this->methods === null) {
-            throw new UpdaterException(t('Couldn\'t retrieve Updater class methods.'));
+            throw new UpdaterException(t('Couldn\'t retrieve updater class methods.'));
         }
 
         foreach ($this->methods as $method) {
             // Not an update method or already done, pass.
-            if (! startsWith($method->getName(), 'updateMethod')
+            if (!startsWith($method->getName(), 'updateMethod')
                 || in_array($method->getName(), $this->doneUpdates)
             ) {
                 continue;
@@ -139,7 +152,7 @@ class Updater
                 }
             }
             $this->conf->write($this->isLoggedIn);
-            unlink($this->conf->get('resource.data_dir').'/options.php');
+            unlink($this->conf->get('resource.data_dir') . '/options.php');
         }
 
         return true;
@@ -174,10 +187,10 @@ class Updater
         $subConfig = array('config', 'plugins');
         foreach ($subConfig as $sub) {
             foreach ($oldConfig[$sub] as $key => $value) {
-                if (isset($legacyMap[$sub .'.'. $key])) {
-                    $configKey = $legacyMap[$sub .'.'. $key];
+                if (isset($legacyMap[$sub . '.' . $key])) {
+                    $configKey = $legacyMap[$sub . '.' . $key];
                 } else {
-                    $configKey = $sub .'.'. $key;
+                    $configKey = $sub . '.' . $key;
                 }
                 $this->conf->set($configKey, $value);
             }
@@ -233,7 +246,7 @@ class Updater
             return true;
         }
 
-        $save = $this->conf->get('resource.data_dir') .'/datastore.'. date('YmdHis') .'.php';
+        $save = $this->conf->get('resource.data_dir') . '/datastore.' . date('YmdHis') . '.php';
         copy($this->conf->get('resource.datastore'), $save);
 
         $links = array();
@@ -307,7 +320,7 @@ class Updater
         // We run the update only if this folder still contains the template files.
         $tplDir = $this->conf->get('resource.raintpl_tpl');
         $tplFile = $tplDir . '/linklist.html';
-        if (! file_exists($tplFile)) {
+        if (!file_exists($tplFile)) {
             return true;
         }
 
@@ -331,7 +344,7 @@ class Updater
      */
     public function updateMethodMoveUserCss()
     {
-        if (! is_file('inc/user.css')) {
+        if (!is_file('inc/user.css')) {
             return true;
         }
 
@@ -367,11 +380,11 @@ class Updater
      */
     public function updateMethodPiwikUrl()
     {
-        if (! $this->conf->exists('plugins.PIWIK_URL') || startsWith($this->conf->get('plugins.PIWIK_URL'), 'http')) {
+        if (!$this->conf->exists('plugins.PIWIK_URL') || startsWith($this->conf->get('plugins.PIWIK_URL'), 'http')) {
             return true;
         }
 
-        $this->conf->set('plugins.PIWIK_URL', 'http://'. $this->conf->get('plugins.PIWIK_URL'));
+        $this->conf->set('plugins.PIWIK_URL', 'http://' . $this->conf->get('plugins.PIWIK_URL'));
         $this->conf->write($this->isLoggedIn);
 
         return true;
@@ -481,11 +494,11 @@ class Updater
             return true;
         }
 
-        if (! $this->conf->exists('general.download_max_size')) {
-            $this->conf->set('general.download_max_size', 1024*1024*4);
+        if (!$this->conf->exists('general.download_max_size')) {
+            $this->conf->set('general.download_max_size', 1024 * 1024 * 4);
         }
 
-        if (! $this->conf->exists('general.download_timeout')) {
+        if (!$this->conf->exists('general.download_timeout')) {
             $this->conf->set('general.download_timeout', 30);
         }
 
@@ -538,96 +551,3 @@ class Updater
         return true;
     }
 }
-
-/**
- * Class UpdaterException.
- */
-class UpdaterException extends Exception
-{
-    /**
-     * @var string Method where the error occurred.
-     */
-    protected $method;
-
-    /**
-     * @var Exception The parent exception.
-     */
-    protected $previous;
-
-    /**
-     * Constructor.
-     *
-     * @param string         $message  Force the error message if set.
-     * @param string         $method   Method where the error occurred.
-     * @param Exception|bool $previous Parent exception.
-     */
-    public function __construct($message = '', $method = '', $previous = false)
-    {
-        $this->method = $method;
-        $this->previous = $previous;
-        $this->message = $this->buildMessage($message);
-    }
-
-    /**
-     * Build the exception error message.
-     *
-     * @param string $message Optional given error message.
-     *
-     * @return string The built error message.
-     */
-    private function buildMessage($message)
-    {
-        $out = '';
-        if (! empty($message)) {
-            $out .= $message . PHP_EOL;
-        }
-
-        if (! empty($this->method)) {
-            $out .= t('An error occurred while running the update ') . $this->method . PHP_EOL;
-        }
-
-        if (! empty($this->previous)) {
-            $out .= '  '. $this->previous->getMessage();
-        }
-
-        return $out;
-    }
-}
-
-/**
- * Read the updates file, and return already done updates.
- *
- * @param string $updatesFilepath Updates file path.
- *
- * @return array Already done update methods.
- */
-function read_updates_file($updatesFilepath)
-{
-    if (! empty($updatesFilepath) && is_file($updatesFilepath)) {
-        $content = file_get_contents($updatesFilepath);
-        if (! empty($content)) {
-            return explode(';', $content);
-        }
-    }
-    return array();
-}
-
-/**
- * Write updates file.
- *
- * @param string $updatesFilepath Updates file path.
- * @param array  $updates         Updates array to write.
- *
- * @throws Exception Couldn't write version number.
- */
-function write_updates_file($updatesFilepath, $updates)
-{
-    if (empty($updatesFilepath)) {
-        throw new Exception(t('Updates file path is not set, can\'t write updates.'));
-    }
-
-    $res = file_put_contents($updatesFilepath, implode(';', $updates));
-    if ($res === false) {
-        throw new Exception(t('Unable to write updates in '. $updatesFilepath . '.'));
-    }
-}
diff --git a/application/updater/UpdaterUtils.php b/application/updater/UpdaterUtils.php
new file mode 100644
index 00000000..34d4f422
--- /dev/null
+++ b/application/updater/UpdaterUtils.php
@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * Read the updates file, and return already done updates.
+ *
+ * @param string $updatesFilepath Updates file path.
+ *
+ * @return array Already done update methods.
+ */
+function read_updates_file($updatesFilepath)
+{
+    if (! empty($updatesFilepath) && is_file($updatesFilepath)) {
+        $content = file_get_contents($updatesFilepath);
+        if (! empty($content)) {
+            return explode(';', $content);
+        }
+    }
+    return array();
+}
+
+/**
+ * Write updates file.
+ *
+ * @param string $updatesFilepath Updates file path.
+ * @param array  $updates         Updates array to write.
+ *
+ * @throws Exception Couldn't write version number.
+ */
+function write_updates_file($updatesFilepath, $updates)
+{
+    if (empty($updatesFilepath)) {
+        throw new Exception(t('Updates file path is not set, can\'t write updates.'));
+    }
+
+    $res = file_put_contents($updatesFilepath, implode(';', $updates));
+    if ($res === false) {
+        throw new Exception(t('Unable to write updates in '. $updatesFilepath . '.'));
+    }
+}
diff --git a/application/updater/exception/UpdaterException.php b/application/updater/exception/UpdaterException.php
new file mode 100644
index 00000000..20aceccf
--- /dev/null
+++ b/application/updater/exception/UpdaterException.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace Shaarli\Updater\Exception;
+
+use Exception;
+
+/**
+ * Class UpdaterException.
+ */
+class UpdaterException extends Exception
+{
+    /**
+     * @var string Method where the error occurred.
+     */
+    protected $method;
+
+    /**
+     * @var Exception The parent exception.
+     */
+    protected $previous;
+
+    /**
+     * Constructor.
+     *
+     * @param string         $message  Force the error message if set.
+     * @param string         $method   Method where the error occurred.
+     * @param Exception|bool $previous Parent exception.
+     */
+    public function __construct($message = '', $method = '', $previous = false)
+    {
+        $this->method = $method;
+        $this->previous = $previous;
+        $this->message = $this->buildMessage($message);
+    }
+
+    /**
+     * Build the exception error message.
+     *
+     * @param string $message Optional given error message.
+     *
+     * @return string The built error message.
+     */
+    private function buildMessage($message)
+    {
+        $out = '';
+        if (!empty($message)) {
+            $out .= $message . PHP_EOL;
+        }
+
+        if (!empty($this->method)) {
+            $out .= t('An error occurred while running the update ') . $this->method . PHP_EOL;
+        }
+
+        if (!empty($this->previous)) {
+            $out .= '  ' . $this->previous->getMessage();
+        }
+
+        return $out;
+    }
+}