<?php

# Moved up here because it is used in several spots.
# These are the valid columns that you can filter on.
$filterFields = array( 'Component', 'ServerId', 'Pid', 'Level', 'File', 'Line' );

switch ( $_REQUEST['task'] )
{
    case 'create' :
    {
        // Silently ignore bogus requests
        if ( !empty($_POST['level']) && !empty($_POST['message']) )
        {
            logInit( array( 'id' => "web_js" ) );

            $string = $_POST['message'];

            $file = !empty($_POST['file']) ? preg_replace( '/\w+:\/\/\w+\//', '', $_POST['file'] ) : '';
            if ( !empty( $_POST['line'] ) )
                $line = $_POST['line'];
            else
                $line = NULL;

            $levels = array_flip(Logger::$codes);
            if ( !isset($levels[$_POST['level']]) )
                Panic( "Unexpected logger level '".$_POST['level']."'" );
            $level = $levels[$_POST['level']];
            Logger::fetch()->logPrint( $level, $string, $file, $line );
        }
        ajaxResponse();
        break;
    }
    case 'query' :
    {
        if ( !canView( 'System' ) )
            ajaxError( 'Insufficient permissions to view log entries' );

        $servers = Server::find_all();
        $servers_by_Id = array();
# There is probably a better way to do this.
        foreach ( $servers as $server ) {
          $servers_by_Id[$server->Id()] = $server;
        }

        $minTime = isset($_REQUEST['minTime'])?$_REQUEST['minTime']:NULL;
        $maxTime = isset($_REQUEST['maxTime'])?$_REQUEST['maxTime']:NULL;

        $limit = 100;
        if ( isset($_REQUEST['limit']) ) {
          if ( ( !is_integer( $_REQUEST['limit'] ) and !ctype_digit($_REQUEST['limit']) ) ) {
            Error("Invalid value for limit " . $_REQUEST['limit'] );
          } else {
            $limit = $_REQUEST['limit'];
          }
        }
        $sortField = 'TimeKey';
        if ( isset($_REQUEST['sortField']) ) {
          if ( ! in_array( $_REQUEST['sortField'], $filterFields ) and ( $_REQUEST['sortField'] != 'TimeKey' ) ) {
            Error("Invalid sort field " . $_REQUEST['sortField'] );
          } else {
            $sortField = $_REQUEST['sortField'];
          }
        }
        $sortOrder = (isset($_REQUEST['sortOrder']) and $_REQUEST['sortOrder']) == 'asc' ? 'asc':'desc';
        $filter = isset($_REQUEST['filter'])?$_REQUEST['filter']:array();

        $total = dbFetchOne( 'SELECT count(*) AS Total FROM Logs', 'Total' );
        $sql = 'SELECT * FROM Logs';
        $where = array();
        $values = array();
        if ( $minTime ) {
          $where[] = "TimeKey > ?";
          $values[] = $minTime;
        } elseif ( $maxTime ) {
          $where[] = "TimeKey < ?";
          $values[] = $maxTime;
        }

        foreach ( $filter as $field=>$value ) {
          if ( ! in_array( $field, $filterFields ) ) {
            Error("$field is not in valid filter fields");
            continue;
          }
          if ( $field == 'Level' ){
            $where[] = $field." <= ?";
            $values[] = $value;
          } else {
            $where[] = $field." = ?";
            $values[] = $value;
          }
        }
        if ( count($where) )
          $sql.= ' WHERE '.join( ' AND ', $where );
        $sql .= " order by ".$sortField." ".$sortOrder." limit ".$limit;
        $logs = array();
        foreach ( dbFetchAll( $sql, NULL, $values ) as $log ) {
            $log['DateTime'] = preg_replace( '/^\d+/', strftime( '%Y-%m-%d %H:%M:%S', intval($log['TimeKey']) ), $log['TimeKey'] );
            $log['Server'] = ( $log['ServerId'] and isset($servers_by_Id[$log['ServerId']]) ) ? $servers_by_Id[$log['ServerId']]->Name() : '';
            $log['Message'] = preg_replace('/[\x00-\x1F\x7F-\xFF]/', '', $log['Message'] );
            $logs[] = $log;
        }
        $options = array();
        $where = array();
        $values = array();
        foreach( $filter as $field=>$value ) {
            if ( $field == 'Level' ) {
                $where[$field] = $field." <= ?";
                $values[$field] = $value;
            } else {
                $where[$field] = $field." = ?";
                $values[$field] = $value;
            } 
        }
        foreach( $filterFields as $field )
        {
            $sql = "SELECT DISTINCT $field FROM Logs WHERE NOT isnull($field)";
            $fieldWhere = array_diff_key( $where, array( $field=>true ) );
            $fieldValues = array_diff_key( $values, array( $field=>true ) );
            if ( count($fieldWhere) )
                $sql.= " AND ".join( ' AND ', $fieldWhere );
            $sql.= " ORDER BY $field ASC";
            if ( $field == 'Level' )
            {
                foreach( dbFetchAll( $sql, $field, array_values($fieldValues) ) as $value )
                    if ( $value <= Logger::INFO )
                        $options[$field][$value] = Logger::$codes[$value];
                    else
                        $options[$field][$value] = "DB".$value;
            }
            elseif ( $field == 'ServerId' )
            {
                foreach( dbFetchAll( $sql, $field, array_values($fieldValues) ) as $value )
                        $options['ServerId'][$value] = ( $value and isset($servers_by_Id[$value]) ) ? $servers_by_Id[$value]->Name() : '';

            }
            else
            {
                foreach( dbFetchAll( $sql, $field, array_values( $fieldValues ) ) as $value )
                    if ( $value != '' )
                        $options[$field][] = $value;
            }
        }
        if ( count($filter) )
        {
            $sql = "SELECT count(*) AS Available FROM Logs WHERE ".join( ' AND ', $where );
            $available = dbFetchOne( $sql, 'Available', array_values($values) );
        }
        ajaxResponse( array(
            'updated' => preg_match( '/%/', DATE_FMT_CONSOLE_LONG )?strftime( DATE_FMT_CONSOLE_LONG ):date( DATE_FMT_CONSOLE_LONG ), 
            'total' => $total,
            'available' => isset($available)?$available:$total,
            'logs' => $logs,
            'state' => logState(),
            'options' => $options
        ) );
        break;
    }
    case 'export' :
    {
        if ( !canView( 'System' ) )
            ajaxError( 'Insufficient permissions to export logs' );

        $minTime = isset($_POST['minTime'])?$_POST['minTime']:NULL;
        $maxTime = isset($_POST['maxTime'])?$_POST['maxTime']:NULL;
        if ( !is_null($minTime) && !is_null($maxTime) && $minTime > $maxTime )
        {
            $tempTime = $minTime;
            $minTime = $maxTime;
            $maxTime = $tempTime;
        }
        //$limit = isset($_POST['limit'])?$_POST['limit']:1000;
        $filter = isset($_POST['filter'])?$_POST['filter']:array();
        $sortField = 'TimeKey';
        if ( isset($_POST['sortField']) ) {
          if ( ! in_array( $_POST['sortField'], $filterFields ) and ( $_POST['sortField'] != 'TimeKey' ) ) {
            Error("Invalid sort field " . $_POST['sortField'] );
          } else {
            $sortField = $_POST['sortField'];
          }
        }
        $sortOrder = (isset($_POST['sortOrder']) and $_POST['sortOrder']) == 'asc' ? 'asc':'desc';

        $servers = Server::find_all();
        $servers_by_Id = array();
        # There is probably a better way to do this.
        foreach ( $servers as $server ) {
          $servers_by_Id[$server->Id()] = $server;
        }

        $sql = "select * from Logs";
        $where = array();
        $values = array();
        if ( $minTime )
        {
            preg_match( '/(.+)(\.\d+)/', $minTime, $matches );
            $minTime = strtotime($matches[1]).$matches[2];
            $where[] = "TimeKey >= ?";
            $values[] = $minTime;
        }
        if ( $maxTime )
        {
            preg_match( '/(.+)(\.\d+)/', $maxTime, $matches );
            $maxTime = strtotime($matches[1]).$matches[2];
            $where[] = "TimeKey <= ?";
            $values[] = $maxTime;
        }
        foreach ( $filter as $field=>$value ) {
            if ( $value != '' ) {
                if ( $field == 'Level' ) {
                    $where[] = $field." <= ?";
                    $values[] = $value;
                } else {
                    $where[] = $field." = ?'";
                    $values[] = $value;
                }
            }
        }
        if ( count($where) )
            $sql.= " where ".join( " and ", $where );
        $sql .= " order by ".$sortField." ".$sortOrder;
        //$sql .= " limit ".dbEscape($limit);
        $format = isset($_POST['format'])?$_POST['format']:'text';
        switch( $format )
        {
            case 'text' :
                $exportExt = "txt";
                break;
            case 'tsv' :
                $exportExt = "tsv";
                break;
            case 'html' :
                $exportExt = "html";
                break;
            case 'xml' :
                $exportExt = "xml";
                break;
            default :
                Fatal( "Unrecognised log export format '$format'" );
        }
        $exportKey = substr(md5(rand()),0,8);
        $exportFile = "zm-log.$exportExt";
        $exportPath = ZM_PATH_SWAP."/zm-log-$exportKey.$exportExt";
        if ( !($exportFP = fopen( $exportPath, "w" )) )
            Fatal( "Unable to open log export file $exportPath" );
        $logs = array();
        foreach ( dbFetchAll( $sql, NULL, $values ) as $log )
        {
            $log['DateTime'] = preg_replace( '/^\d+/', strftime( "%Y-%m-%d %H:%M:%S", intval($log['TimeKey']) ), $log['TimeKey'] );
            $log['Server'] = ( $log['ServerId'] and isset($servers_by_Id[$log['ServerId']]) ) ? $servers_by_Id[$log['ServerId']]->Name() : '';
            $logs[] = $log;
        }
        switch( $format )
        {
            case 'text' :
            {
                foreach ( $logs as $log )
                {
                    if ( $log['Line'] )
                        fprintf( $exportFP, "%s %s[%d].%s-%s/%d [%s]\n", $log['DateTime'], $log['Component'], $log['Pid'], $log['Code'], $log['File'], $log['Line'], $log['Message'] );
                    else
                        fprintf( $exportFP, "%s %s[%d].%s-%s [%s]\n", $log['DateTime'], $log['Component'], $log['Pid'], $log['Code'], $log['File'], $log['Message'] );
                }
                break;
            }
            case 'tsv' :
            {
# This line doesn't need fprintf, it could use fwrite
                fprintf( $exportFP, join( "\t",
											translate('DateTime'),
											translate('Component'),
											translate('Server'),
											translate('Pid'),
											translate('Level'),
											translate('Message'),
											translate('File'),
											translate('Line')
											)."\n" );
                foreach ( $logs as $log )
                {
									fprintf( $exportFP, "%s\t%s\t%s\t%d\t%s\t%s\t%s\t%s\n", $log['DateTime'], $log['Component'], $log['Server'], $log['Pid'], $log['Code'], $log['Message'], $log['File'], $log['Line'] );
                }
                break;
            }
            case 'html' :
            {
                fwrite( $exportFP,
'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <title>'.translate('ZoneMinderLog').'</title>
    <style type="text/css">
body, h3, p, table, td {
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: 11px;
}
table {
    border-collapse: collapse;
    width: 100%;
}
th {
    font-weight: bold;
}
th, td {
    border: 1px solid #888888;
    padding: 1px 2px;
}
tr.log-fat td {
    background-color:#ffcccc;
    font-weight: bold;
    font-style: italic;
}
tr.log-err td {
    background-color:#ffcccc;
}
tr.log-war td {
    background-color: #ffe4b5;
}
tr.log-dbg td {
    color: #666666;
    font-style: italic;
}
    </style>
  </head>
  <body>
    <h3>'.translate('ZoneMinderLog').'</h3>
    <p>'.htmlspecialchars(preg_match( '/%/', DATE_FMT_CONSOLE_LONG )?strftime( DATE_FMT_CONSOLE_LONG ):date( DATE_FMT_CONSOLE_LONG )).'</p>
    <p>'.count($logs).' '.translate('Logs').'</p>
    <table>
      <tbody>
        <tr><th>'.translate('DateTime').'</th><th>'.translate('Component').'</th><th>'.translate('Server').'</th><th>'.translate('Pid').'</th><th>'.translate('Level').'</th><th>'.translate('Message').'</th><th>'.translate('File').'</th><th>'.translate('Line').'</th></tr>
' );
                foreach ( $logs as $log )
                {
                    $classLevel = $log['Level'];
                    if ( $classLevel < Logger::FATAL )
                        $classLevel = Logger::FATAL;
                    elseif ( $classLevel > Logger::DEBUG )
                        $classLevel = Logger::DEBUG;
                    $logClass = 'log-'.strtolower(Logger::$codes[$classLevel]);
                    fprintf( $exportFP, "        <tr class=\"%s\"><td>%s</td><td>%s</td><td>%s</td><td>%d</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td></tr>\n", $logClass, $log['DateTime'], $log['Component'], $log['Server'], $log['Pid'], $log['Code'], $log['Message'], $log['File'], $log['Line'] );
                }
                fwrite( $exportFP, 
'      </tbody>
    </table>
  </body>
</html>' );
                break;
            }
            case 'xml' :
            {
                fwrite( $exportFP,
'<?xml version="1.0" encoding="utf-8"?>
<logexport title="'.translate('ZoneMinderLog').'" date="'.htmlspecialchars(preg_match( '/%/', DATE_FMT_CONSOLE_LONG )?strftime( DATE_FMT_CONSOLE_LONG ):date( DATE_FMT_CONSOLE_LONG )).'">
  <selector>'.$_POST['selector'].'</selector>' );
                foreach ( $filter as $field=>$value )
                    if ( $value != '' )
                      fwrite( $exportFP, 
'  <filter>
    <'.strtolower($field).'>'.htmlspecialchars($value).'</'.strtolower($field).'>
  </filter>' );
                fwrite( $exportFP, 
'  <columns>
    <column field="datetime">'.translate('DateTime').'</column><column field="component">'.translate('Component').'</column><column field="'.translate('Server').'</column><column field="pid">'.translate('Pid').'</column><column field="level">'.translate('Level').'</column><column field="message">'.translate('Message').'</column><column field="file">'.translate('File').'</column><column field="line">'.translate('Line').'</column>
  </columns>
  <logs count="'.count($logs).'">
' );
                foreach ( $logs as $log )
                {
                    fprintf( $exportFP, 
"    <log>
      <datetime>%s</datetime>
      <component>%s</component>
      <server>%s</server>
      <pid>%d</pid>
      <level>%s</level>
      <message><![CDATA[%s]]></message>
      <file>%s</file>
      <line>%d</line>
    </log>\n", $log['DateTime'], $log['Component'], $log['Server'], $log['Pid'], $log['Code'], utf8_decode( $log['Message'] ), $log['File'], $log['Line'] );
                }
                fwrite( $exportFP, 
'  </logs>
</logexport>' );
                break;
            }
                $exportExt = "xml";
                break;
        }
        fclose( $exportFP );
        ajaxResponse( array(
            'key' => $exportKey,
            'format' => $format,
        ) );
        break;
    }
    case 'download' :
    {
        if ( !canView( 'System' ) )
            ajaxError( 'Insufficient permissions to download logs' );

        if ( empty($_REQUEST['key']) )
            Fatal( "No log export key given" );
        $exportKey = $_REQUEST['key'];
        if ( empty($_REQUEST['format']) )
            Fatal( "No log export format given" );
        $format = $_REQUEST['format'];
        
        switch( $format )
        {
            case 'text' :
                $exportExt = "txt";
                break;
            case 'tsv' :
                $exportExt = "tsv";
                break;
            case 'html' :
                $exportExt = "html";
                break;
            case 'xml' :
                $exportExt = "xml";
                break;
            default :
                Fatal( "Unrecognised log export format '$format'" );
        }

        $exportFile = "zm-log.$exportExt";
        $exportPath = ZM_PATH_SWAP."/zm-log-$exportKey.$exportExt";

        header( "Pragma: public" );
        header( "Expires: 0" );
        header( "Cache-Control: must-revalidate, post-check=0, pre-check=0" );
        header( "Cache-Control: private", false ); // required by certain browsers
        header( "Content-Description: File Transfer" );
        header( 'Content-Disposition: attachment; filename="'.$exportFile.'"' );
        header( "Content-Transfer-Encoding: binary" );
        header( "Content-Type: application/force-download" );
        header( "Content-Length: ".filesize($exportPath) );
        readfile( $exportPath );
        exit( 0 );
        break;
    }
}

ajaxError( 'Unrecognised action or insufficient permissions' );

?>