<?php
require_once( 'database.php' );
require_once( 'Storage.php' );

class Event {
  public function __construct( $IdOrRow ) {
    $row = NULL;
    if ( $IdOrRow ) {
      if ( is_integer( $IdOrRow ) or is_numeric( $IdOrRow ) ) {
        $row = dbFetchOne( 'SELECT *,unix_timestamp(StartTime) as Time FROM Events WHERE Id=?', NULL, array( $IdOrRow ) );
        if ( ! $row ) {
          Error("Unable to load Event record for Id=" . $IdOrRow );
        }
      } elseif ( is_array( $IdOrRow ) ) {
        $row = $IdOrRow;
      } else {
        Error("Unknown argument passed to Event Constructor ($IdOrRow)");
        return;
      }
    } # end if isset($IdOrRow)

    if ( $row ) {
      foreach ($row as $k => $v) {
        $this->{$k} = $v;
      }
    } else {
      Error("No row for Event " . $IdOrRow );
    }
  } // end function __construct
  public function Storage() {
    return new Storage( isset($this->{'StorageId'}) ? $this->{'StorageId'} : NULL );
  }
  public function __call( $fn, array $args){
    if ( array_key_exists( $fn, $this ) ) {
      return $this->{$fn};
#array_unshift($args, $this);
#call_user_func_array( $this->{$fn}, $args);
    }
  }

  public function Time() {
    if ( ! isset( $this->{'Time'} ) ) {
      $this->{'Time'} = strtotime($this->{'StartTime'});
    }
    return $this->{'Time'};
  }

  public function Path() {
    $Storage = $this->Storage();
    return $Storage->Path().'/'.$this->Relative_Path();
  }
  public function Relative_Path() {
    $event_path = "";

    if ( ZM_USE_DEEP_STORAGE )
    {
      $event_path = 
        $this->{'MonitorId'}
      .'/'.strftime( "%y/%m/%d/%H/%M/%S",
          $this->Time()
          )
        ;
    }
    else
    {
      $event_path = 
        $this->{'MonitorId'}
      .'/'.$this->{'Id'}
      ;
    }

    return( $event_path );

  }

  public function Link_Path() {
    if ( ZM_USE_DEEP_STORAGE ) {
      return $this->{'MonitorId'} .'/'.strftime( "%y/%m/%d/.", $this->Time()).$this->{'Id'};
    }
    Error("Calling Link_Path when not using deep storage");
    return '';
  }

  public function delete() {
    # This wouldn't work with foreign keys
    dbQuery( 'DELETE FROM Events WHERE Id = ?', array($this->{'Id'}) );
    if ( !ZM_OPT_FAST_DELETE ) {
      dbQuery( 'DELETE FROM Stats WHERE EventId = ?', array($this->{'Id'}) );
      dbQuery( 'DELETE FROM Frames WHERE EventId = ?', array($this->{'Id'}) );
      if ( ZM_USE_DEEP_STORAGE ) {

# Assumption: All events haev a start time
        $start_date = date_parse( $this->{'StartTime'} );
        if ( ! $start_date ) {
          Error("Unable to parse start time for event " . $this->{'Id'} . ' not deleting files.' );
          return;
        }
        $start_date['year'] = $start_date['year'] % 100;

        $Storage = $this->Storage();
# So this is  because ZM creates a link under teh day pointing to the time that the event happened. 
        if ( ! $this->Link_Path() ) {
          Error("Unable to determine link path for event " . $this->{'Id'} . ' not deleting files.' );
          return;
        }
        
        $eventlink_path = $Storage->Path().'/'.$this->Link_Path();

        if ( $id_files = glob( $eventlink_path ) ) {
          if ( ! $eventPath = readlink($id_files[0]) ) {
            Error("Unable to read link at $id_files[0]");
            return;
          }
# I know we are using arrays here, but really there can only ever be 1 in the array
          $eventPath = preg_replace( '/\.'.$this->{'Id'}.'$/', $eventPath, $id_files[0] );
          deletePath( $eventPath );
          deletePath( $id_files[0] );
          $pathParts = explode(  '/', $eventPath );
          for ( $i = count($pathParts)-1; $i >= 2; $i-- ) {
            $deletePath = join( '/', array_slice( $pathParts, 0, $i ) );
            if ( !glob( $deletePath."/*" ) ) {
              deletePath( $deletePath );
            }
          }
        } else {
          Warning( "Found no event files under $eventlink_path" );
        } # end if found files
      } else {
        $eventPath = $this->Path();
        deletePath( $eventPath );
      } # USE_DEEP_STORAGE OR NOT
    } # ! ZM_OPT_FAST_DELETE
  } # end Event->delete

  public function getStreamSrc( $args, $querySep='&amp;' ) {
    return ( ZM_BASE_PATH != '/' ? ZM_BASE_PATH : '' ).'/index.php?view=view_video&eid='.$this->{'Id'};

    $streamSrc = ZM_BASE_URL.ZM_PATH_ZMS;

    $args[] = "source=event&event=".$this->{'Id'};

    if ( ZM_OPT_USE_AUTH ) {
      if ( ZM_AUTH_RELAY == "hashed" ) {
        $args[] = "auth=".generateAuthHash( ZM_AUTH_HASH_IPS );
      } elseif ( ZM_AUTH_RELAY == "plain" ) {
        $args[] = "user=".$_SESSION['username'];
        $args[] = "pass=".$_SESSION['password'];
      } elseif ( ZM_AUTH_RELAY == "none" ) {
        $args[] = "user=".$_SESSION['username'];
      }
    }
    if ( !in_array( "mode=single", $args ) && !empty($GLOBALS['connkey']) ) {
      $args[] = "connkey=".$GLOBALS['connkey'];
    }
    if ( ZM_RAND_STREAM ) {
      $args[] = "rand=".time();
    }

    if ( count($args) ) {
      $streamSrc .= "?".join( $querySep, $args );
    }

    return( $streamSrc );
  } // end function getStreamSrc

  function DiskSpace() {
    return folder_size( $this->Path() );
  }

  function createListThumbnail( $overwrite=false ) {
# Load the frame with the highest score to use as a thumbnail
  if ( !($frame = dbFetchOne( "SELECT * FROM Frames WHERE EventId=? AND Score=? ORDER BY FrameId LIMIT 1", NULL, array( $this->{'Id'}, $this->{'MaxScore'} ) )) )
    return( false );

  $frameId = $frame['FrameId'];

  if ( ZM_WEB_LIST_THUMB_WIDTH ) {
    $thumbWidth = ZM_WEB_LIST_THUMB_WIDTH;
    $scale = (SCALE_BASE*ZM_WEB_LIST_THUMB_WIDTH)/$this->{'Width'};
    $thumbHeight = reScale( $this->{'Height'}, $scale );
  } elseif ( ZM_WEB_LIST_THUMB_HEIGHT ) {
    $thumbHeight = ZM_WEB_LIST_THUMB_HEIGHT;
    $scale = (SCALE_BASE*ZM_WEB_LIST_THUMB_HEIGHT)/$this->{'Height'};
    $thumbWidth = reScale( $this->{'Width'}, $scale );
  } else {
    Fatal( "No thumbnail width or height specified, please check in Options->Web" );
  }

  $imageData = $this->getImageSrc( $frame, $scale, false, $overwrite );
  if ( ! $imageData ) {
    return ( false );
  }
  $thumbData = $frame;
  $thumbData['Path'] = $imageData['thumbPath'];
  $thumbData['Width'] = (int)$thumbWidth;
  $thumbData['Height'] = (int)$thumbHeight;

  return( $thumbData );
}
function getImageSrc( $frame, $scale=SCALE_BASE, $captureOnly=false, $overwrite=false ) {
  $Storage = new Storage( $this->{'StorageId'} );
  $Event = $this;
  $eventPath = $Event->Path();

  if ( !is_array($frame) )
    $frame = array( 'FrameId'=>$frame, 'Type'=>'' );

  if ( file_exists( $eventPath.'/snapshot.jpg' ) ) {
    $captImage = "snapshot.jpg";
  } else {
    $captImage = sprintf( "%0".ZM_EVENT_IMAGE_DIGITS."d-capture.jpg", $frame['FrameId'] );
    if ( ! file_exists( $eventPath.'/'.$captImage ) ) {
# Generate the frame JPG
      if ( $Event->DefaultVideo() ) {
        $command ='ffmpeg -v 0 -i '.$eventPath.'/'.$Event->DefaultVideo().' -vf "select=gte(n\\,'.$frame['FrameId'].'),setpts=PTS-STARTPTS" '.$eventPath.'/'.$captImage;
        Debug( "Running $command" );
        $output = array();
        $retval = 0;
        exec( $command, $output, $retval );
        Debug("Retval: $retval, output: " . implode("\n", $output));
      } else {
        Error("Can't create frame images from video becuase there is no video file for this event (".$Event->DefaultVideo() );
      }
    }
  }

  $captPath = $eventPath.'/'.$captImage;
  if ( ! file_exists( $captPath ) ) {
    Error( "Capture file does not exist at $captPath" );
    return '';
  }
  $thumbCaptPath = ZM_DIR_IMAGES.'/'.$this->{'Id'}.'-'.$captImage;
  
  //echo "CI:$captImage, CP:$captPath, TCP:$thumbCaptPath<br>";

  $analImage = sprintf( "%0".ZM_EVENT_IMAGE_DIGITS."d-analyse.jpg", $frame['FrameId'] );
  $analPath = $eventPath.'/'.$analImage;

  $thumbAnalPath = ZM_DIR_IMAGES.'/'.$this->{'Id'}.'-'.$analImage;
  //echo "AI:$analImage, AP:$analPath, TAP:$thumbAnalPath<br>";

  $alarmFrame = $frame['Type']=='Alarm';

  $hasAnalImage = $alarmFrame && file_exists( $analPath ) && filesize( $analPath );
  $isAnalImage = $hasAnalImage && !$captureOnly;

  if ( !ZM_WEB_SCALE_THUMBS || $scale >= SCALE_BASE || !function_exists( 'imagecreatefromjpeg' ) ) {
    $imagePath = $thumbPath = $isAnalImage?$analPath:$captPath;
    $imageFile = $imagePath;
    $thumbFile = $thumbPath;
  } else {
    if ( version_compare( phpversion(), "4.3.10", ">=") )
      $fraction = sprintf( "%.3F", $scale/SCALE_BASE );
    else
      $fraction = sprintf( "%.3f", $scale/SCALE_BASE );
    $scale = (int)round( $scale );

    $thumbCaptPath = preg_replace( "/\.jpg$/", "-$scale.jpg", $thumbCaptPath );
    $thumbAnalPath = preg_replace( "/\.jpg$/", "-$scale.jpg", $thumbAnalPath );

    if ( $isAnalImage ) {
      $imagePath = $analPath;
      $thumbPath = $thumbAnalPath;
    } else {
      $imagePath = $captPath;
      $thumbPath = $thumbCaptPath;
    }

    $thumbFile = $thumbPath;
    if ( $overwrite || !file_exists( $thumbFile ) || !filesize( $thumbFile ) )
    {
      // Get new dimensions
      list( $imageWidth, $imageHeight ) = getimagesize( $imagePath );
      $thumbWidth = $imageWidth * $fraction;
      $thumbHeight = $imageHeight * $fraction;

      // Resample
      $thumbImage = imagecreatetruecolor( $thumbWidth, $thumbHeight );
      $image = imagecreatefromjpeg( $imagePath );
      imagecopyresampled( $thumbImage, $image, 0, 0, 0, 0, $thumbWidth, $thumbHeight, $imageWidth, $imageHeight );

      if ( !imagejpeg( $thumbImage, $thumbPath ) )
        Error( "Can't create thumbnail '$thumbPath'" );
    }
  }

  $imageData = array(
      'eventPath' => $eventPath,
      'imagePath' => $imagePath,
      'thumbPath' => $thumbPath,
      'imageFile' => $imagePath,
      'thumbFile' => $thumbFile,
      'imageClass' => $alarmFrame?"alarm":"normal",
      'isAnalImage' => $isAnalImage,
      'hasAnalImage' => $hasAnalImage,
      );

  return( $imageData );
}

} # end class

?>