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<?php
/**
 * Phinx
 *
 * (The MIT license)
 * Copyright (c) 2015 Rob Morgan
 * Copyright (c) 2015 Woody Gilk
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated * documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

namespace Phinx\Wrapper;

use Phinx\Console\PhinxApplication;
use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Output\StreamOutput;

/**
 * Phinx text wrapper: a way to run `status`, `migrate`, and `rollback` commands
 * and get the output of the command back as plain text.
 *
 * @author Woody Gilk <woody.gilk@gmail.com>
 */
class TextWrapper
{
    /**
     * @var PhinxApplication
     */
    private $app;

/**
     * @var array
     */
    private $options = array();

/**
     * @var integer
     */
    private $exit_code;

/**
     * @param PhinxApplication $app
     * @param array $options
     */
    public function __construct(PhinxApplication $app, array $options = array())
    {
        $this->app = $app;
        $this->options = $options;
    }

/**
     * Get the application instance.
     *
     * @return PhinxApplication
     */
    public function getApp()
    {
        return $this->app;
    }

/**
     * Returns the exit code from the last run command.
     * @return integer
     */
    public function getExitCode()
    {
        return $this->exit_code;
    }

/**
     * Returns the output from running the "status" command.
     * @param  string $env environment name (optional)
     * @return string
     */
    public function getStatus($env = null)
    {
        $command = array('status');
        if ($env ?: $this->hasOption('environment')) {
            $command += array('-e' => $env ?: $this->getOption('environment'));
        }
        if ($this->hasOption('configuration')) {
            $command += array('-c' => $this->getOption('configuration'));
        }
        if ($this->hasOption('parser')) {
            $command += array('-p' => $this->getOption('parser'));
        }
        return $this->executeRun($command);
    }

/**
     * Returns the output from running the "migrate" command.
     * @param  string $env environment name (optional)
     * @param  string $target target version (optional)
     * @return string
     */
    public function getMigrate($env = null, $target = null)
    {
        $command = array('migrate');
        if ($env ?: $this->hasOption('environment')) {
            $command += array('-e' => $env ?: $this->getOption('environment'));
        }
        if ($this->hasOption('configuration')) {
            $command += array('-c' => $this->getOption('configuration'));
        }
        if ($this->hasOption('parser')) {
            $command += array('-p' => $this->getOption('parser'));
        }
        if ($target) {
            $command += array('-t' => $target);
        }
        return $this->executeRun($command);
    }

/**
     * Returns the output from running the "seed:run" command.
     * @param  string|null       $env environment name
     * @param  string|null       $target target version
     * @param  array|string|null $seed array of seed names or seed name
     * @return string
     */
    public function getSeed($env = null, $target = null, $seed = null)
    {
        $command = array ('seed:run');
        if ($env ?: $this->hasOption('environment')) {
            $command += array('-e' => $env ?: $this->getOption('environment'));
        }
        if ($this->hasOption('configuration')) {
            $command += array('-c' => $this->getOption('configuration'));
        }
        if ($this->hasOption('parser')) {
            $command += array('-p' => $this->getOption('parser'));
        }
        if ($target) {
            $command += array('-t' => $target);
        }
        if ($seed) {
            $seed = (array) $seed;
            $command += array('-s' => $seed);
        }
        return $this->executeRun($command);
    }

/**
     * Returns the output from running the "rollback" command.
     * @param  string $env environment name (optional)
     * @param  mixed $target target version, or 0 (zero) fully revert (optional)
     * @return string
     */
    public function getRollback($env = null, $target = null)
    {
        $command = array('rollback');
        if ($env ?: $this->hasOption('environment')) {
            $command += array('-e' => $env ?: $this->getOption('environment'));
        }
        if ($this->hasOption('configuration')) {
            $command += array('-c' => $this->getOption('configuration'));
        }
        if ($this->hasOption('parser')) {
            $command += array('-p' => $this->getOption('parser'));
        }
        if (isset($target)) {
            // Need to use isset() with rollback, because -t0 is a valid option!
            // See http://docs.phinx.org/en/latest/commands.html#the-rollback-command
            $command += array('-t' => $target);
        }
        return $this->executeRun($command);
    }

/**
     * Check option from options array
     *
     * @param  string $key
     * @return bool
     */
    protected function hasOption($key)
    {
        return isset($this->options[$key]);
    }

/**
     * Get option from options array
     *
     * @param  string $key
     * @return string|null
     */
    protected function getOption($key)
    {
        if (!isset($this->options[$key])) {
            return null;
        }
        return $this->options[$key];
    }

/**
     * Set option in options array
     *
     * @param  string $key
     * @param  string $value
     * @return object
     */
    public function setOption($key, $value)
    {
        $this->options[$key] = $value;
        return $this;
    }

/**
     * Execute a command, capturing output and storing the exit code.
     *
     * @param  array $command
     * @return string
     */
    protected function executeRun(array $command)
    {
        // Output will be written to a temporary stream, so that it can be
        // collected after running the command.
        $stream = fopen('php://temp', 'w+');

// Execute the command, capturing the output in the temporary stream
        // and storing the exit code for debugging purposes.
        $this->exit_code = $this->app->doRun(new ArrayInput($command), new StreamOutput($stream));

// Get the output of the command and close the stream, which will
        // destroy the temporary file.
        $result = stream_get_contents($stream, -1, 0);
        fclose($stream);

return $result;
    }
}

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