Completed
Push — develop ( 7abf7e...ed0ab6 )
by Stuart
04:40
created

ShowProgress::addProgressCount()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 9
Code Lines 6

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 1
eloc 6
nc 1
nop 4
dl 0
loc 9
rs 9.6666
c 0
b 0
f 0
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<?php
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/**
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 * Copyright (c) 2016-present Ganbaro Digital Ltd
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 *   * Redistributions of source code must retain the above copyright
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 *     notice, this list of conditions and the following disclaimer.
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 *
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 *   * Redistributions in binary form must reproduce the above copyright
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 *     notice, this list of conditions and the following disclaimer in
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 *     the documentation and/or other materials provided with the
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 *     distribution.
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 *
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 *   * Neither the names of the copyright holders nor the names of his
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 *     contributors may be used to endorse or promote products derived
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 *     from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 *
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 * @category  Libraries
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 * @package   MissingBits/ConsoleOutput
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 * @author    Stuart Herbert <[email protected]>
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 * @copyright 2016-present Ganbaro Digital Ltd www.ganbarodigital.com
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 * @license   http://www.opensource.org/licenses/bsd-license.php  BSD License
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 * @link      http://ganbarodigital.github.io/php-the-missing-bits
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 */
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namespace GanbaroDigital\MissingBits\ConsoleOutput;
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/**
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 * echo a character for each item, along with '[x / y]' to show overall
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 * progress
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 */
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class ShowProgress
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{
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    /**
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     * echo a character for each item, along with '[x / y]' to show overall
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     * progress
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     *
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     * @param  string $progressChar
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     *         what should we output?
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     *         this should be a single character; ASCII codes are fine
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     *         as long as they only move the cursor 1 character to the
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     *         right after they have completed
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     * @param  int $currentProgress
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     *         how much progress has been made?
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     * @param  int $maxProgress
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     *         what is the maximum value of $currentProgress?
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     * @param  int $consoleWidth
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     *         how wide is the terminal display?
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     *         default assumes UNIX standard width of 80 chars
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     * @param  callback $printerFunc
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     *         what should we use to write to the console?
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     *         this needs to accept printf() arguments
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     * @return string
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     *         anything returned by your $printerFunc
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     */
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    public static function with($progressChar, $currentProgress, $maxProgress, $consoleWidth = 80, $printerFunc = 'printf')
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    {
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        // build the current progress
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        //
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        // we do this to ensure that we call `$printerFunc` a maximum
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        // of once
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        //
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        // hopefully this is better for performance
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        $format = "%s";
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        $formatParams = [ $progressChar ];
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        // do we need to output anything else?
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        $maxString = (string)$maxProgress;
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        $maxPerRow = $consoleWidth - 10 - (strlen($maxString) * 2);
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        $remainderPerRow = $currentProgress % $maxPerRow;
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        // have we reached 100% progress?
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        if ($currentProgress == $maxProgress) {
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            $format .= "%s";
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            $formatParams[] = str_repeat(' ', $remainderPerRow);
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            list($format, $formatParams) = self::addProgressCount($currentProgress, $maxProgress, $format, $formatParams);
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        }
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        else if ($remainderPerRow === 0) {
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            // we have reached the end of the console line
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            list($format, $formatParams) = self::addProgressCount($currentProgress, $maxProgress, $format, $formatParams);
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        }
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        // all done
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        return call_user_func_array($printerFunc, array_append_values([$format], $formatParams));
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    }
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    /**
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     * add a summary of progress to date to the existing format string
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     * and associated parameters
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     *
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     * @param  int $currentProgress
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     * @param  int $maxProgress
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     * @param  string $format
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     * @param  array $formatParams
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     * @return array
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     */
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    private static function addProgressCount($currentProgress, $maxProgress, $format, $formatParams)
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    {
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        $maxString = (string)$maxProgress;
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        $format .= ' [%' . strlen($maxString) . 's / %s]' . PHP_EOL;
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        $formatParams[] = (string)$currentProgress;
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        $formatParams[] = $maxString;
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        return [ $format, $formatParams ];
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    }
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}