<?php namespace HashOver;

// Copyright (C) 2010-2021 Jacob Barkdull
// This file is part of HashOver.
//
// HashOver is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// HashOver is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with HashOver. If not, see <http://www.gnu.org/licenses/>.


class Statistics
{
protected $executionStart;
protected $executionEnd;
protected $executionMicroTime;

public $executionTime;
public $scriptMemory;
public $systemMemory;

// Starts script execution time in seconds
public function executionStart ()
{
$this->executionStart = microtime (true);
}

// Script execution ending time
public function executionEnd ($mode = 'javascript')
{
// End time in seconds
$this->executionEnd = microtime (true);

// Difference between start time and end time in seconds
$this->executionMicroTime = $this->executionEnd - $this->executionStart;

// Unit to divided memory bytes by (1,024² for mibibytes)
$division_unit = pow (1024, 2);

// Memory the script consumed divided by division unit
$script_memory = round (memory_get_peak_usage () / $division_unit, 2);
$this->scriptMemory = $script_memory . ' MiB';

// Memory the system consumed divided by division unit
$system_memory = round (memory_get_peak_usage (true) / $division_unit, 2);
$this->systemMemory = $system_memory . ' MiB';

// Display execution time in millisecond(s)
if ($this->executionMicroTime < 1) {
$this->executionTime = round ($this->executionMicroTime * 1000, 5) . ' ms';
} else {
// Display execution time in seconds
$this->executionTime = round ($this->executionMicroTime, 5) . ' Second';

// Add plural to any execution time other than one
if ($this->executionMicroTime !== 1) {
$this->executionTime .= 's';
}
}

// Statistics inner-comment
$statistics = PHP_EOL . PHP_EOL;
$statistics .= "\t" . 'HashOver Statistics' . PHP_EOL . PHP_EOL;
$statistics .= "\t" . 'Execution Time : ' . $this->executionTime . PHP_EOL;
$statistics .= "\t" . 'Script Memory Peak : ' . $this->scriptMemory . PHP_EOL;
$statistics .= "\t" . 'System Memory Peak : ' . $this->systemMemory;
$statistics .= PHP_EOL . PHP_EOL;

// Return statistics as JavaScript comment
if ($mode !== 'php') {
return PHP_EOL . '/*' . $statistics . '*/';
}

// Return statistics as HTML comment by default
return PHP_EOL . '<!--' . $statistics . '-->';
}
}