5 files changed, 153 insertions, 26 deletions
diff --git a/phpBB/includes/acp/acp_logs.php b/phpBB/includes/acp/acp_logs.php
index 4322cd006d..6b7ed1d269 100644
--- a/phpBB/includes/acp/acp_logs.php
+++ b/phpBB/includes/acp/acp_logs.php
@@ -54,7 +54,7 @@ class acp_logs
 		{
 			if (confirm_box(true))
 			{
-				$where_sql = '';
+				$conditions = array();
 
 				if ($deletemark && sizeof($marked))
 				{
@@ -63,19 +63,25 @@ class acp_logs
 					{
 						$sql_in[] = $mark;
 					}
-					$where_sql = ' AND ' . $db->sql_in_set('log_id', $sql_in);
+					$conditions['log_id'] = $sql_in;
 					unset($sql_in);
 				}
 
-				if ($where_sql || $deleteall)
+				if ($deleteall)
 				{
-					$sql = 'DELETE FROM ' . LOG_TABLE . "
-						WHERE log_type = {$this->log_type}
-						$where_sql";
-					$db->sql_query($sql);
+					if ($sort_days)
+					{
+						$conditions['log_time'] = array('>=', time() - ($sort_days * 86400));
+					}
 
-					add_log('admin', 'LOG_CLEAR_' . strtoupper($mode));
+					$keywords = utf8_normalize_nfc(request_var('keywords', '', true));
+					$conditions['keywords'] = $keywords;
 				}
+
+				$conditions['log_type'] = $this->log_type;
+
+				$phpbb_log = $phpbb_container->get('log');
+				$phpbb_log->delete($mode, $conditions);
 			}
 			else
 			{
diff --git a/phpBB/includes/mcp/mcp_logs.php b/phpBB/includes/mcp/mcp_logs.php
index c55f56ae0c..a0c1bc02ec 100644
--- a/phpBB/includes/mcp/mcp_logs.php
+++ b/phpBB/includes/mcp/mcp_logs.php
@@ -36,7 +36,7 @@ class mcp_logs
 	function main($id, $mode)
 	{
 		global $auth, $db, $user, $template;
-		global $config, $phpbb_root_path, $phpEx, $phpbb_container;
+		global $config, $phpbb_root_path, $phpEx, $phpbb_container, $phpbb_log;
 
 		$user->add_lang('acp/common');
 
@@ -114,27 +114,35 @@ class mcp_logs
 			{
 				if ($deletemark && sizeof($marked))
 				{
-					$sql = 'DELETE FROM ' . LOG_TABLE . '
-						WHERE log_type = ' . LOG_MOD . '
-							AND ' . $db->sql_in_set('forum_id', $forum_list) . '
-							AND ' . $db->sql_in_set('log_id', $marked);
-					$db->sql_query($sql);
+					$conditions = array(
+						'log_type'	=> LOG_MOD,
+						'forum_id'	=> $forum_list,
+						'log_id'	=> $marked,
+					);
 
-					add_log('admin', 'LOG_CLEAR_MOD');
+					$phpbb_log->delete('mod', $conditions);
 				}
 				else if ($deleteall)
 				{
-					$sql = 'DELETE FROM ' . LOG_TABLE . '
-						WHERE log_type = ' . LOG_MOD . '
-							AND ' . $db->sql_in_set('forum_id', $forum_list);
+					$keywords = utf8_normalize_nfc(request_var('keywords', '', true));
+
+					$conditions = array(
+						'log_type'	=> LOG_MOD,
+						'forum_id'	=> $forum_list,
+						'keywords'	=> $keywords,
+					);
+
+					if ($sort_days)
+					{
+						$conditions['log_time'] = array('>=', time() - ($sort_days * 86400));
+					}
 
 					if ($mode == 'topic_logs')
 					{
-						$sql .= ' AND topic_id = ' . $topic_id;
+						$conditions['topic_logs'] = $topic_id;
 					}
-					$db->sql_query($sql);
 
-					add_log('admin', 'LOG_CLEAR_MOD');
+					$phpbb_log->delete('mod', $conditions);
 				}
 			}
 			else
diff --git a/phpBB/phpbb/log/log.php b/phpBB/phpbb/log/log.php
index d83fa90a8e..453cb740bb 100644
--- a/phpBB/phpbb/log/log.php
+++ b/phpBB/phpbb/log/log.php
@@ -332,6 +332,98 @@ class log implements \phpbb\log\log_interface
 	}
 
 	/**
+	* {@inheritDoc}
+	*/
+	public function delete($mode, $conditions = array())
+	{
+		switch ($mode)
+		{
+			case 'admin':
+				$log_type = LOG_ADMIN;
+				break;
+
+			case 'mod':
+				$log_type = LOG_MOD;
+				break;
+
+			case 'user':
+				$log_type = LOG_USERS;
+				break;
+
+			case 'users':
+				$log_type = LOG_USERS;
+				break;
+
+			case 'critical':
+				$log_type = LOG_CRITICAL;
+				break;
+
+			default:
+				$log_type = false;
+		}
+
+		/**
+		* Allows to modify log data before we delete it from the database
+		*
+		* NOTE: if sql_ary does not contain a log_type value, the entry will
+		* not be deleted in the database. So ensure to set it, if needed.
+		*
+		* @event core.delete_log
+		* @var	string	mode			Mode of the entry we log
+		* @var	string	log_type		Type ID of the log (should be different than false)
+		* @var	array	conditions		An array of conditions, 3 different  forms are accepted
+		* 								1) <key> => <value> transformed into 'AND <key> = <value>' (value should be an integer)
+		*								2) <key> => array(<operator>, <value>) transformed into 'AND <key> <operator> <value>' (values can't be an array)
+		*								3) <key> => array('IN' => array(<values>)) transformed into 'AND <key> IN <values>'
+		*								A special field, keywords, can also be defined. In this case only the log entries that have the keywords in log_operation or log_data will be deleted.
+		* @since 3.1.0-b4
+		*/
+		$vars = array(
+			'mode',
+			'log_type',
+			'conditions',
+		);
+		extract($this->dispatcher->trigger_event('core.delete_log', compact($vars)));
+
+		if ($log_type === false)
+		{
+			return;
+		}
+
+		$sql_where = 'WHERE log_type = ' . $log_type;
+		foreach ($conditions as $field => $field_value)
+		{
+			$sql_where .= ' AND ';
+
+			if ($field == 'keywords')
+			{
+				$sql_where .= $this->generate_sql_keyword($field_value, '', '');
+			}
+			else
+			{
+				if (is_array($field_value) && sizeof($field_value) == 2 && !is_array($field_value[1]))
+				{
+					$sql_where .= $field . ' ' . $field_value[0] . ' ' . $field_value[1];
+				}
+				else if (is_array($field_value) && isset($field_value['IN']) && is_array($field_value['IN']))
+				{
+					$sql_where .= $this->db->sql_in_set($field, $field_value['IN']);
+				}
+				else
+				{
+					$sql_where .= $field . ' = ' . $field_value;
+				}
+			}
+		}
+
+		$sql = 'DELETE FROM ' . LOG_TABLE . "
+					$sql_where";
+		$this->db->sql_query($sql);
+
+		$this->add('admin', $this->user->data['user_id'], $this->user->ip, 'LOG_CLEAR_' . strtoupper($mode));
+	}
+
+	/**
 	* Grab the logs from the database
 	*
 	* {@inheritDoc}
@@ -638,11 +730,13 @@ class log implements \phpbb\log\log_interface
 	/**
 	* Generates a sql condition for the specified keywords
 	*
-	* @param	string	$keywords	The keywords the user specified to search for
+	* @param	string	$keywords			The keywords the user specified to search for
+	* @param	string	$table_alias		The alias of the logs' table ('l.' by default)
+	* @param	string	$statement_operator	The operator used to prefix the statement ('AND' by default)
 	*
 	* @return	string		Returns the SQL condition searching for the keywords
 	*/
-	protected function generate_sql_keyword($keywords)
+	protected function generate_sql_keyword($keywords, $table_alias = 'l.', $statement_operator = 'AND')
 	{
 		// Use no preg_quote for $keywords because this would lead to sole
 		// backslashes being added. We also use an OR connection here for
@@ -687,12 +781,12 @@ class log implements \phpbb\log\log_interface
 				}
 			}
 
-			$sql_keywords = 'AND (';
+			$sql_keywords = $statement_operator . ' (';
 			if (!empty($operations))
 			{
-				$sql_keywords .= $this->db->sql_in_set('l.log_operation', $operations) . ' OR ';
+				$sql_keywords .= $this->db->sql_in_set($table_alias . 'log_operation', $operations) . ' OR ';
 			}
-			$sql_lower = $this->db->sql_lower_text('l.log_data');
+			$sql_lower = $this->db->sql_lower_text($table_alias . 'log_data');
 			$sql_keywords .= " $sql_lower " . implode(" OR $sql_lower ", $keywords) . ')';
 		}
 
diff --git a/phpBB/phpbb/log/log_interface.php b/phpBB/phpbb/log/log_interface.php
index 2a44ebecb6..5932f722aa 100644
--- a/phpBB/phpbb/log/log_interface.php
+++ b/phpBB/phpbb/log/log_interface.php
@@ -69,6 +69,18 @@ interface log_interface
 	public function add($mode, $user_id, $log_ip, $log_operation, $log_time = false, $additional_data = array());
 
 	/**
+	* Delete entries in the logs
+	*
+	* @param 	string	$mode		The mode defines which log_type is used and from which log the entries are deleted
+	* @param 	array	$conditions	An array of conditions, 3 different  forms are accepted
+	* 								1) <key> => <value> transformed into 'AND <key> = <value>' (value should be an integer)
+	*								2) <key> => array(<operator>, <value>) transformed into 'AND <key> <operator> <value>' (values can't be an array)
+	*								3) <key> => array('IN' => array(<values>)) transformed into 'AND <key> IN <values>'
+	*								A special field, keywords, can also be defined. In this case only the log entries that have the keywords in log_operation or log_data will be deleted.
+	*/
+	public function delete($mode, $conditions = array());
+
+	/**
 	* Grab the logs from the database
 	*
 	* @param	string	$mode			The mode defines which log_type is used and ifrom which log the entry is retrieved
diff --git a/phpBB/phpbb/log/null.php b/phpBB/phpbb/log/null.php
index 7b11cc9e21..baa78895ea 100644
--- a/phpBB/phpbb/log/null.php
+++ b/phpBB/phpbb/log/null.php
@@ -51,6 +51,13 @@ class null implements log_interface
 	/**
 	* {@inheritdoc}
 	*/
+	public function delete($mode, $conditions = array())
+	{
+	}
+
+	/**
+	* {@inheritdoc}
+	*/
 	public function get_logs($mode, $count_logs = true, $limit = 0, $offset = 0, $forum_id = 0, $topic_id = 0, $user_id = 0, $log_time = 0, $sort_by = 'l.log_time DESC', $keywords = '')
 	{
 		return array();