GitElephant\Objects\Diff\DiffChunk

Complexity

Total Complexity

30

Size/Duplication

Total Lines	297
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Test Coverage

Coverage

58.75%

Importance

Changes

0

19 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	7	1
B	parseLines()	0	23	7
A	getLinesNumbers()	0	20	3
A	getDestStartLine()	0	4	1
A	getDestEndLine()	0	4	1
A	getOriginStartLine()	0	4	1
A	getOriginEndLine()	0	4	1
A	getHeaderLine()	0	13	2
A	getLines()	0	4	1
A	offsetExists()	0	4	1
A	offsetSet()	0	8	2
A	offsetUnset()	0	4	1
A	current()	0	4	1
A	next()	0	4	1
A	key()	0	4	1
A	valid()	0	4	1
A	rewind()	0	4	1
A	count()	0	4	1
A	offsetGet()	0	4	2

<?php

/**
 * GitElephant - An abstraction layer for git written in PHP
 * Copyright (C) 2013  Matteo Giachino
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see [http://www.gnu.org/licenses/].
 */

namespace GitElephant\Objects\Diff;

/**
 * A single portion of a file changed in a diff
 *
 * @author Matteo Giachino <matteog@gmail.com>
 */
class DiffChunk implements \ArrayAccess, \Countable, \Iterator
{
    /**
     * the cursor position
     *
     * @var int
     */
    private $position;

    /**
     * diff start line from original file
     *
     * @var int
     */
    private $originStartLine;

    /**
     * diff end line from original file
     *
     * @var int
     */
    private $originEndLine;

    /**
     * diff start line from destination file
     *
     * @var int
     */
    private $destStartLine;

    /**
     * diff end line from destination file
     *
     * @var int
     */
    private $destEndLine;

    /**
     * hunk header line
     *
     * @var string
     */
    private $headerLine;

    /**
     * array of lines
     *
     * @var array<DiffChunkLine>
     */
    private $lines = [];

    /**
     * Class constructor
     *
     * @param array $lines output lines from git binary
     *
     * @throws \Exception
     */
    public function __construct(array $lines)
    {
        $this->position = 0;

        $this->getLinesNumbers($lines[0]);
        $this->parseLines(array_slice($lines, 1));
    }

    /**
     * Parse lines
     *
     * @param array $lines output lines
     *
     * @throws \Exception
     */
    private function parseLines(array $lines): void
    {
        $originUnchanged = $this->originStartLine;
        $destUnchanged = $this->destStartLine;

        $deleted = $this->originStartLine;
        $new = $this->destStartLine;
        foreach ($lines as $line) {
            if (preg_match('/^\+(.*)/', $line)) {
                $this->lines[] = new DiffChunkLineAdded($new++, preg_replace('/\+(.*)/', ' $1', $line));
                $destUnchanged++;
            } elseif (preg_match('/^-(.*)/', $line)) {
                $this->lines[] = new DiffChunkLineDeleted($deleted++, preg_replace('/-(.*)/', ' $1', $line));
                $originUnchanged++;
            } elseif (preg_match('/^ (.*)/', $line) || $line == '') {
                $this->lines[] = new DiffChunkLineUnchanged($originUnchanged++, $destUnchanged++, $line);
                $deleted++;
                $new++;
            } elseif (!preg_match('/\\ No newline at end of file/', $line)) {
                throw new \Exception(sprintf('GitElephant was unable to parse the line %s', $line));
            }
        }
    }

    /**
     * Get line numbers
     *
     * @param string $line a single line
     */
    private function getLinesNumbers(string $line): void
    {
        $matches = [];
        preg_match('/@@ -(.*) \+(.*) @@?(.*)/', $line, $matches);
        if (!strpos($matches[1], ',')) {
            // one line
            $this->originStartLine = $matches[1];

The property $originStartLine was declared of type integer, but $matches[1] is of type string. Maybe add a type cast?

            $this->originEndLine = $matches[1];

The property $originEndLine was declared of type integer, but $matches[1] is of type string. Maybe add a type cast?

        } else {
            [$this->originStartLine, $this->originEndLine] = explode(',', $matches[1]);
        }

        if (!strpos($matches[2], ',')) {
            // one line
            $this->destStartLine = $matches[2];

The property $destStartLine was declared of type integer, but $matches[2] is of type string. Maybe add a type cast?

            $this->destEndLine = $matches[2];

The property $destEndLine was declared of type integer, but $matches[2] is of type string. Maybe add a type cast?

        } else {
            [$this->destStartLine, $this->destEndLine] = explode(',', $matches[2]);
        }
    }

    /**
     * destStartLine getter
     *
     * @return int
     */
    public function getDestStartLine(): int
    {
        return $this->destStartLine;
    }

    /**
     * destEndLine getter
     *
     * @return int
     */
    public function getDestEndLine(): int
    {
        return $this->destEndLine;
    }

    /**
     * originStartLine getter
     *
     * @return int
     */
    public function getOriginStartLine(): int
    {
        return $this->originStartLine;
    }

    /**
     * originEndLine getter
     *
     * @return int
     */
    public function getOriginEndLine(): int
    {
        return $this->originEndLine;
    }

    /**
     * Get hunk header line
     *
     * @return string
     */
    public function getHeaderLine(): string
    {
        if (null === $this->headerLine) {
            $line = '@@';
            $line .= ' -' . $this->getOriginStartLine() . ',' . $this->getOriginEndLine();
            $line .= ' +' . $this->getDestStartLine() . ',' . $this->getDestEndLine();
            $line .= ' @@';

            $this->headerLine = $line;
        }

        return $this->headerLine;
    }

    /**
     * Get Lines
     *
     * @return array
     */
    public function getLines(): array
    {
        return $this->lines;
    }

    /**
     * ArrayAccess interface
     *
     * @param int $offset offset
     *
     * @return bool
     */
    public function offsetExists($offset): bool
    {
        return isset($this->lines[$offset]);
    }

    /**
     * ArrayAccess interface
     *
     * @param int $offset offset
     *
     * @return DiffChunkLine|null
     */
    public function offsetGet($offset)
    {
        return isset($this->lines[$offset]) ? $this->lines[$offset] : null;
    }

    /**
     * ArrayAccess interface
     *
     * @param int|null   $offset offset
     * @param mixed $value  value
     */
    public function offsetSet($offset, $value): void
    {
        if (is_null($offset)) {
            $this->lines[] = $value;
        } else {
            $this->lines[$offset] = $value;
        }
    }

    /**
     * ArrayAccess interface
     *
     * @param int $offset offset
     */
    public function offsetUnset($offset): void
    {
        unset($this->lines[$offset]);
    }

    /**
     * Countable interface
     *
     * @return int
     */
    public function count(): int
    {
        return count($this->lines);
    }

    /**
     * Iterator interface
     *
     * @return mixed
     */
    public function current()
    {
        return $this->lines[$this->position];
    }

    /**
     * Iterator interface
     */
    public function next(): void
    {
        ++$this->position;
    }

    /**
     * Iterator interface
     *
     * @return int
     */
    public function key(): int
    {
        return $this->position;
    }

    /**
     * Iterator interface
     *
     * @return bool
     */
    public function valid(): bool
    {
        return isset($this->lines[$this->position]);
    }

    /**
     * Iterator interface
     */
    public function rewind(): void
    {
        $this->position = 0;
    }
}