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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Console;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\ArgvInput;
use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Output\Output;
use Symfony\Component\Console\Output\ConsoleOutput;
use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Command\HelpCommand;
use Symfony\Component\Console\Command\ListCommand;
use Symfony\Component\Console\Helper\HelperSet;
use Symfony\Component\Console\Helper\FormatterHelper;
use Symfony\Component\Console\Helper\DialogHelper;
/**
* An Application is the container for a collection of commands.
*
* It is the main entry point of a Console application.
*
* This class is optimized for a standard CLI environment.
*
* Usage:
*
* $app = new Application('myapp', '1.0 (stable)');
* $app->add(new SimpleCommand());
* $app->run();
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @api
*/
class Application
{
private $commands;
private $wantHelps = false;
private $runningCommand;
private $name;
private $version;
private $catchExceptions;
private $autoExit;
private $definition;
private $helperSet;
/**
* Constructor.
*
* @param string $name The name of the application
* @param string $version The version of the application
*
* @api
*/
public function __construct($name = 'UNKNOWN', $version = 'UNKNOWN')
{
$this->name = $name;
$this->version = $version;
$this->catchExceptions = true;
$this->autoExit = true;
$this->commands = array();
$this->helperSet = $this->getDefaultHelperSet();
$this->definition = $this->getDefaultInputDefinition();
foreach ($this->getDefaultCommands() as $command) {
$this->add($command);
}
}
/**
* Runs the current application.
*
* @param InputInterface $input An Input instance
* @param OutputInterface $output An Output instance
*
* @return integer 0 if everything went fine, or an error code
*
* @throws \Exception When doRun returns Exception
*
* @api
*/
public function run(InputInterface $input = null, OutputInterface $output = null)
{
if (null === $input) {
$input = new ArgvInput();
}
if (null === $output) {
$output = new ConsoleOutput();
}
try {
$statusCode = $this->doRun($input, $output);
} catch (\Exception $e) {
if (!$this->catchExceptions) {
throw $e;
}
if ($output instanceof ConsoleOutputInterface) {
$this->renderException($e, $output->getErrorOutput());
} else {
$this->renderException($e, $output);
}
$statusCode = $e->getCode();
$statusCode = is_numeric($statusCode) && $statusCode ? $statusCode : 1;
}
if ($this->autoExit) {
if ($statusCode > 255) {
$statusCode = 255;
}
// @codeCoverageIgnoreStart
exit($statusCode);
// @codeCoverageIgnoreEnd
}
return $statusCode;
}
/**
* Runs the current application.
*
* @param InputInterface $input An Input instance
* @param OutputInterface $output An Output instance
*
* @return integer 0 if everything went fine, or an error code
*/
public function doRun(InputInterface $input, OutputInterface $output)
{
$name = $this->getCommandName($input);
if (true === $input->hasParameterOption(array('--ansi'))) {
$output->setDecorated(true);
} elseif (true === $input->hasParameterOption(array('--no-ansi'))) {
$output->setDecorated(false);
}
if (true === $input->hasParameterOption(array('--help', '-h'))) {
if (!$name) {
$name = 'help';
$input = new ArrayInput(array('command' => 'help'));
} else {
$this->wantHelps = true;
}
}
if (true === $input->hasParameterOption(array('--no-interaction', '-n'))) {
$input->setInteractive(false);
}
if (function_exists('posix_isatty') && $this->getHelperSet()->has('dialog')) {
$inputStream = $this->getHelperSet()->get('dialog')->getInputStream();
if (!posix_isatty($inputStream)) {
$input->setInteractive(false);
}
}
if (true === $input->hasParameterOption(array('--quiet', '-q'))) {
$output->setVerbosity(OutputInterface::VERBOSITY_QUIET);
} elseif (true === $input->hasParameterOption(array('--verbose', '-v'))) {
$output->setVerbosity(OutputInterface::VERBOSITY_VERBOSE);
}
if (true === $input->hasParameterOption(array('--version', '-V'))) {
$output->writeln($this->getLongVersion());
return 0;
}
if (!$name) {
$name = 'list';
$input = new ArrayInput(array('command' => 'list'));
}
// the command name MUST be the first element of the input
$command = $this->find($name);
$this->runningCommand = $command;
$statusCode = $command->run($input, $output);
$this->runningCommand = null;
return is_numeric($statusCode) ? $statusCode : 0;
}
/**
* Set a helper set to be used with the command.
*
* @param HelperSet $helperSet The helper set
*
* @api
*/
public function setHelperSet(HelperSet $helperSet)
{
$this->helperSet = $helperSet;
}
/**
* Get the helper set associated with the command.
*
* @return HelperSet The HelperSet instance associated with this command
*
* @api
*/
public function getHelperSet()
{
return $this->helperSet;
}
/**
* Gets the InputDefinition related to this Application.
*
* @return InputDefinition The InputDefinition instance
*/
public function getDefinition()
{
return $this->definition;
}
/**
* Gets the help message.
*
* @return string A help message.
*/
public function getHelp()
{
$messages = array(
$this->getLongVersion(),
'',
'<comment>Usage:</comment>',
sprintf(" [options] command [arguments]\n"),
'<comment>Options:</comment>',
);
foreach ($this->getDefinition()->getOptions() as $option) {
$messages[] = sprintf(' %-29s %s %s',
'<info>--'.$option->getName().'</info>',
$option->getShortcut() ? '<info>-'.$option->getShortcut().'</info>' : ' ',
$option->getDescription()
);
}
return implode(PHP_EOL, $messages);
}
/**
* Sets whether to catch exceptions or not during commands execution.
*
* @param Boolean $boolean Whether to catch exceptions or not during commands execution
*
* @api
*/
public function setCatchExceptions($boolean)
{
$this->catchExceptions = (Boolean) $boolean;
}
/**
* Sets whether to automatically exit after a command execution or not.
*
* @param Boolean $boolean Whether to automatically exit after a command execution or not
*
* @api
*/
public function setAutoExit($boolean)
{
$this->autoExit = (Boolean) $boolean;
}
/**
* Gets the name of the application.
*
* @return string The application name
*
* @api
*/
public function getName()
{
return $this->name;
}
/**
* Sets the application name.
*
* @param string $name The application name
*
* @api
*/
public function setName($name)
{
$this->name = $name;
}
/**
* Gets the application version.
*
* @return string The application version
*
* @api
*/
public function getVersion()
{
return $this->version;
}
/**
* Sets the application version.
*
* @param string $version The application version
*
* @api
*/
public function setVersion($version)
{
$this->version = $version;
}
/**
* Returns the long version of the application.
*
* @return string The long application version
*
* @api
*/
public function getLongVersion()
{
if ('UNKNOWN' !== $this->getName() && 'UNKNOWN' !== $this->getVersion()) {
return sprintf('<info>%s</info> version <comment>%s</comment>', $this->getName(), $this->getVersion());
}
return '<info>Console Tool</info>';
}
/**
* Registers a new command.
*
* @param string $name The command name
*
* @return Command The newly created command
*
* @api
*/
public function register($name)
{
return $this->add(new Command($name));
}
/**
* Adds an array of command objects.
*
* @param Command[] $commands An array of commands
*
* @api
*/
public function addCommands(array $commands)
{
foreach ($commands as $command) {
$this->add($command);
}
}
/**
* Adds a command object.
*
* If a command with the same name already exists, it will be overridden.
*
* @param Command $command A Command object
*
* @return Command The registered command
*
* @api
*/
public function add(Command $command)
{
$command->setApplication($this);
if (!$command->isEnabled()) {
$command->setApplication(null);
return;
}
$this->commands[$command->getName()] = $command;
foreach ($command->getAliases() as $alias) {
$this->commands[$alias] = $command;
}
return $command;
}
/**
* Returns a registered command by name or alias.
*
* @param string $name The command name or alias
*
* @return Command A Command object
*
* @throws \InvalidArgumentException When command name given does not exist
*
* @api
*/
public function get($name)
{
if (!isset($this->commands[$name])) {
throw new \InvalidArgumentException(sprintf('The command "%s" does not exist.', $name));
}
$command = $this->commands[$name];
if ($this->wantHelps) {
$this->wantHelps = false;
$helpCommand = $this->get('help');
$helpCommand->setCommand($command);
return $helpCommand;
}
return $command;
}
/**
* Returns true if the command exists, false otherwise.
*
* @param string $name The command name or alias
*
* @return Boolean true if the command exists, false otherwise
*
* @api
*/
public function has($name)
{
return isset($this->commands[$name]);
}
/**
* Returns an array of all unique namespaces used by currently registered commands.
*
* It does not returns the global namespace which always exists.
*
* @return array An array of namespaces
*/
public function getNamespaces()
{
$namespaces = array();
foreach ($this->commands as $command) {
$namespaces[] = $this->extractNamespace($command->getName());
foreach ($command->getAliases() as $alias) {
$namespaces[] = $this->extractNamespace($alias);
}
}
return array_values(array_unique(array_filter($namespaces)));
}
/**
* Finds a registered namespace by a name or an abbreviation.
*
* @param string $namespace A namespace or abbreviation to search for
*
* @return string A registered namespace
*
* @throws \InvalidArgumentException When namespace is incorrect or ambiguous
*/
public function findNamespace($namespace)
{
$allNamespaces = array();
foreach ($this->getNamespaces() as $n) {
$allNamespaces[$n] = explode(':', $n);
}
$found = array();
foreach (explode(':', $namespace) as $i => $part) {
$abbrevs = static::getAbbreviations(array_unique(array_values(array_filter(array_map(function ($p) use ($i) { return isset($p[$i]) ? $p[$i] : ''; }, $allNamespaces)))));
if (!isset($abbrevs[$part])) {
$message = sprintf('There are no commands defined in the "%s" namespace.', $namespace);
if (1 <= $i) {
$part = implode(':', $found).':'.$part;
}
if ($alternatives = $this->findAlternativeNamespace($part, $abbrevs)) {
$message .= "\n\nDid you mean one of these?\n ";
$message .= implode("\n ", $alternatives);
}
throw new \InvalidArgumentException($message);
}
if (count($abbrevs[$part]) > 1) {
throw new \InvalidArgumentException(sprintf('The namespace "%s" is ambiguous (%s).', $namespace, $this->getAbbreviationSuggestions($abbrevs[$part])));
}
$found[] = $abbrevs[$part][0];
}
return implode(':', $found);
}
/**
* Finds a command by name or alias.
*
* Contrary to get, this command tries to find the best
* match if you give it an abbreviation of a name or alias.
*
* @param string $name A command name or a command alias
*
* @return Command A Command instance
*
* @throws \InvalidArgumentException When command name is incorrect or ambiguous
*
* @api
*/
public function find($name)
{
// namespace
$namespace = '';
$searchName = $name;
if (false !== $pos = strrpos($name, ':')) {
$namespace = $this->findNamespace(substr($name, 0, $pos));
$searchName = $namespace.substr($name, $pos);
}
// name
$commands = array();
foreach ($this->commands as $command) {
if ($this->extractNamespace($command->getName()) == $namespace) {
$commands[] = $command->getName();
}
}
$abbrevs = static::getAbbreviations(array_unique($commands));
if (isset($abbrevs[$searchName]) && 1 == count($abbrevs[$searchName])) {
return $this->get($abbrevs[$searchName][0]);
}
if (isset($abbrevs[$searchName]) && count($abbrevs[$searchName]) > 1) {
$suggestions = $this->getAbbreviationSuggestions($abbrevs[$searchName]);
throw new \InvalidArgumentException(sprintf('Command "%s" is ambiguous (%s).', $name, $suggestions));
}
// aliases
$aliases = array();
foreach ($this->commands as $command) {
foreach ($command->getAliases() as $alias) {
if ($this->extractNamespace($alias) == $namespace) {
$aliases[] = $alias;
}
}
}
$aliases = static::getAbbreviations(array_unique($aliases));
if (!isset($aliases[$searchName])) {
$message = sprintf('Command "%s" is not defined.', $name);
if ($alternatives = $this->findAlternativeCommands($searchName, $abbrevs)) {
$message .= "\n\nDid you mean one of these?\n ";
$message .= implode("\n ", $alternatives);
}
throw new \InvalidArgumentException($message);
}
if (count($aliases[$searchName]) > 1) {
throw new \InvalidArgumentException(sprintf('Command "%s" is ambiguous (%s).', $name, $this->getAbbreviationSuggestions($aliases[$searchName])));
}
return $this->get($aliases[$searchName][0]);
}
/**
* Gets the commands (registered in the given namespace if provided).
*
* The array keys are the full names and the values the command instances.
*
* @param string $namespace A namespace name
*
* @return array An array of Command instances
*
* @api
*/
public function all($namespace = null)
{
if (null === $namespace) {
return $this->commands;
}
$commands = array();
foreach ($this->commands as $name => $command) {
if ($namespace === $this->extractNamespace($name, substr_count($namespace, ':') + 1)) {
$commands[$name] = $command;
}
}
return $commands;
}
/**
* Returns an array of possible abbreviations given a set of names.
*
* @param array $names An array of names
*
* @return array An array of abbreviations
*/
static public function getAbbreviations($names)
{
$abbrevs = array();
foreach ($names as $name) {
for ($len = strlen($name) - 1; $len > 0; --$len) {
$abbrev = substr($name, 0, $len);
if (!isset($abbrevs[$abbrev])) {
$abbrevs[$abbrev] = array($name);
} else {
$abbrevs[$abbrev][] = $name;
}
}
}
// Non-abbreviations always get entered, even if they aren't unique
foreach ($names as $name) {
$abbrevs[$name] = array($name);
}
return $abbrevs;
}
/**
* Returns a text representation of the Application.
*
* @param string $namespace An optional namespace name
* @param boolean $raw Whether to return raw command list
*
* @return string A string representing the Application
*/
public function asText($namespace = null, $raw = false)
{
$commands = $namespace ? $this->all($this->findNamespace($namespace)) : $this->commands;
$width = 0;
foreach ($commands as $command) {
$width = strlen($command->getName()) > $width ? strlen($command->getName()) : $width;
}
$width += 2;
if ($raw) {
$messages = array();
foreach ($this->sortCommands($commands) as $space => $commands) {
foreach ($commands as $name => $command) {
$messages[] = sprintf("%-${width}s %s", $name, $command->getDescription());
}
}
return implode(PHP_EOL, $messages);
}
$messages = array($this->getHelp(), '');
if ($namespace) {
$messages[] = sprintf("<comment>Available commands for the \"%s\" namespace:</comment>", $namespace);
} else {
$messages[] = '<comment>Available commands:</comment>';
}
// add commands by namespace
foreach ($this->sortCommands($commands) as $space => $commands) {
if (!$namespace && '_global' !== $space) {
$messages[] = '<comment>'.$space.'</comment>';
}
foreach ($commands as $name => $command) {
$messages[] = sprintf(" <info>%-${width}s</info> %s", $name, $command->getDescription());
}
}
return implode(PHP_EOL, $messages);
}
/**
* Returns an XML representation of the Application.
*
* @param string $namespace An optional namespace name
* @param Boolean $asDom Whether to return a DOM or an XML string
*
* @return string|DOMDocument An XML string representing the Application
*/
public function asXml($namespace = null, $asDom = false)
{
$commands = $namespace ? $this->all($this->findNamespace($namespace)) : $this->commands;
$dom = new \DOMDocument('1.0', 'UTF-8');
$dom->formatOutput = true;
$dom->appendChild($xml = $dom->createElement('symfony'));
$xml->appendChild($commandsXML = $dom->createElement('commands'));
if ($namespace) {
$commandsXML->setAttribute('namespace', $namespace);
} else {
$namespacesXML = $dom->createElement('namespaces');
$xml->appendChild($namespacesXML);
}
// add commands by namespace
foreach ($this->sortCommands($commands) as $space => $commands) {
if (!$namespace) {
$namespaceArrayXML = $dom->createElement('namespace');
$namespacesXML->appendChild($namespaceArrayXML);
$namespaceArrayXML->setAttribute('id', $space);
}
foreach ($commands as $name => $command) {
if ($name !== $command->getName()) {
continue;
}
if (!$namespace) {
$commandXML = $dom->createElement('command');
$namespaceArrayXML->appendChild($commandXML);
$commandXML->appendChild($dom->createTextNode($name));
}
$node = $command->asXml(true)->getElementsByTagName('command')->item(0);
$node = $dom->importNode($node, true);
$commandsXML->appendChild($node);
}
}
return $asDom ? $dom : $dom->saveXml();
}
/**
* Renders a caught exception.
*
* @param Exception $e An exception instance
* @param OutputInterface $output An OutputInterface instance
*/
public function renderException($e, $output)
{
$strlen = function ($string) {
if (!function_exists('mb_strlen')) {
return strlen($string);
}
if (false === $encoding = mb_detect_encoding($string)) {
return strlen($string);
}
return mb_strlen($string, $encoding);
};
do {
$title = sprintf(' [%s] ', get_class($e));
$len = $strlen($title);
$width = $this->getTerminalWidth() ? $this->getTerminalWidth() - 1 : PHP_INT_MAX;
$lines = array();
foreach (preg_split("{\r?\n}", $e->getMessage()) as $line) {
foreach (str_split($line, $width - 4) as $line) {
$lines[] = sprintf(' %s ', $line);
$len = max($strlen($line) + 4, $len);
}
}
$messages = array(str_repeat(' ', $len), $title.str_repeat(' ', max(0, $len - $strlen($title))));
foreach ($lines as $line) {
$messages[] = $line.str_repeat(' ', $len - $strlen($line));
}
$messages[] = str_repeat(' ', $len);
$output->writeln("");
$output->writeln("");
foreach ($messages as $message) {
$output->writeln('<error>'.$message.'</error>');
}
$output->writeln("");
$output->writeln("");
if (OutputInterface::VERBOSITY_VERBOSE === $output->getVerbosity()) {
$output->writeln('<comment>Exception trace:</comment>');
// exception related properties
$trace = $e->getTrace();
array_unshift($trace, array(
'function' => '',
'file' => $e->getFile() != null ? $e->getFile() : 'n/a',
'line' => $e->getLine() != null ? $e->getLine() : 'n/a',
'args' => array(),
));
for ($i = 0, $count = count($trace); $i < $count; $i++) {
$class = isset($trace[$i]['class']) ? $trace[$i]['class'] : '';
$type = isset($trace[$i]['type']) ? $trace[$i]['type'] : '';
$function = $trace[$i]['function'];
$file = isset($trace[$i]['file']) ? $trace[$i]['file'] : 'n/a';
$line = isset($trace[$i]['line']) ? $trace[$i]['line'] : 'n/a';
$output->writeln(sprintf(' %s%s%s() at <info>%s:%s</info>', $class, $type, $function, $file, $line));
}
$output->writeln("");
$output->writeln("");
}
} while ($e = $e->getPrevious());
if (null !== $this->runningCommand) {
$output->writeln(sprintf('<info>%s</info>', sprintf($this->runningCommand->getSynopsis(), $this->getName())));
$output->writeln("");
$output->writeln("");
}
}
/**
* Tries to figure out the terminal width in which this application runs
*
* @return int|null
*/
protected function getTerminalWidth()
{
if (defined('PHP_WINDOWS_VERSION_BUILD') && $ansicon = getenv('ANSICON')) {
return preg_replace('{^(\d+)x.*$}', '$1', $ansicon);
}
if (preg_match("{rows.(\d+);.columns.(\d+);}i", $this->getSttyColumns(), $match)) {
return $match[2];
}
}
/**
* Tries to figure out the terminal height in which this application runs
*
* @return int|null
*/
protected function getTerminalHeight()
{
if (defined('PHP_WINDOWS_VERSION_BUILD') && $ansicon = getenv('ANSICON')) {
return preg_replace('{^\d+x\d+ \(\d+x(\d+)\)$}', '$1', trim($ansicon));
}
if (preg_match("{rows.(\d+);.columns.(\d+);}i", $this->getSttyColumns(), $match)) {
return $match[1];
}
}
/**
* Gets the name of the command based on input.
*
* @param InputInterface $input The input interface
*
* @return string The command name
*/
protected function getCommandName(InputInterface $input)
{
return $input->getFirstArgument('command');
}
/**
* Gets the default input definition.
*
* @return InputDefinition An InputDefinition instance
*/
protected function getDefaultInputDefinition()
{
return new InputDefinition(array(
new InputArgument('command', InputArgument::REQUIRED, 'The command to execute'),
new InputOption('--help', '-h', InputOption::VALUE_NONE, 'Display this help message.'),
new InputOption('--quiet', '-q', InputOption::VALUE_NONE, 'Do not output any message.'),
new InputOption('--verbose', '-v', InputOption::VALUE_NONE, 'Increase verbosity of messages.'),
new InputOption('--version', '-V', InputOption::VALUE_NONE, 'Display this application version.'),
new InputOption('--ansi', '', InputOption::VALUE_NONE, 'Force ANSI output.'),
new InputOption('--no-ansi', '', InputOption::VALUE_NONE, 'Disable ANSI output.'),
new InputOption('--no-interaction', '-n', InputOption::VALUE_NONE, 'Do not ask any interactive question.'),
));
}
/**
* Gets the default commands that should always be available.
*
* @return array An array of default Command instances
*/
protected function getDefaultCommands()
{
return array(new HelpCommand(), new ListCommand());
}
/**
* Gets the default helper set with the helpers that should always be available.
*
* @return HelperSet A HelperSet instance
*/
protected function getDefaultHelperSet()
{
return new HelperSet(array(
new FormatterHelper(),
new DialogHelper(),
));
}
/**
* Runs and parses stty -a if it's available, suppressing any error output
*
* @return string
*/
private function getSttyColumns()
{
$descriptorspec = array(1 => array('pipe', 'w'), 2 => array('pipe', 'w'));
$process = proc_open('stty -a | grep columns', $descriptorspec, $pipes, null, null, array('suppress_errors' => true));
if (is_resource($process)) {
$info = stream_get_contents($pipes[1]);
fclose($pipes[1]);
fclose($pipes[2]);
proc_close($process);
return $info;
}
}
/**
* Sorts commands in alphabetical order.
*
* @param array $commands An associative array of commands to sort
*
* @return array A sorted array of commands
*/
private function sortCommands($commands)
{
$namespacedCommands = array();
foreach ($commands as $name => $command) {
$key = $this->extractNamespace($name, 1);
if (!$key) {
$key = '_global';
}
$namespacedCommands[$key][$name] = $command;
}
ksort($namespacedCommands);
foreach ($namespacedCommands as &$commands) {
ksort($commands);
}
return $namespacedCommands;
}
/**
* Returns abbreviated suggestions in string format.
*
* @param array $abbrevs Abbreviated suggestions to convert
*
* @return string A formatted string of abbreviated suggestions
*/
private function getAbbreviationSuggestions($abbrevs)
{
return sprintf('%s, %s%s', $abbrevs[0], $abbrevs[1], count($abbrevs) > 2 ? sprintf(' and %d more', count($abbrevs) - 2) : '');
}
/**
* Returns the namespace part of the command name.
*
* @param string $name The full name of the command
* @param string $limit The maximum number of parts of the namespace
*
* @return string The namespace of the command
*/
private function extractNamespace($name, $limit = null)
{
$parts = explode(':', $name);
array_pop($parts);
return implode(':', null === $limit ? $parts : array_slice($parts, 0, $limit));
}
/**
* Finds alternative commands of $name
*
* @param string $name The full name of the command
* @param array $abbrevs The abbreviations
*
* @return array A sorted array of similar commands
*/
private function findAlternativeCommands($name, $abbrevs)
{
$callback = function($item) {
return $item->getName();
};
return $this->findAlternatives($name, $this->commands, $abbrevs, $callback);
}
/**
* Finds alternative namespace of $name
*
* @param string $name The full name of the namespace
* @param array $abbrevs The abbreviations
*
* @return array A sorted array of similar namespace
*/
private function findAlternativeNamespace($name, $abbrevs)
{
return $this->findAlternatives($name, $this->getNamespaces(), $abbrevs);
}
/**
* Finds alternative of $name among $collection,
* if nothing is found in $collection, try in $abbrevs
*
* @param string $name The string
* @param array|Traversable $collection The collecion
* @param array $abbrevs The abbreviations
* @param Closure|string|array $callback The callable to transform collection item before comparison
*
* @return array A sorted array of similar string
*/
private function findAlternatives($name, $collection, $abbrevs, $callback = null) {
$alternatives = array();
foreach ($collection as $item) {
if (null !== $callback) {
$item = call_user_func($callback, $item);
}
$lev = levenshtein($name, $item);
if ($lev <= strlen($name) / 3 || false !== strpos($item, $name)) {
$alternatives[$item] = $lev;
}
}
if (!$alternatives) {
foreach ($abbrevs as $key => $values) {
$lev = levenshtein($name, $key);
if ($lev <= strlen($name) / 3 || false !== strpos($key, $name)) {
foreach ($values as $value) {
$alternatives[$value] = $lev;
}
}
}
}
asort($alternatives);
return array_keys($alternatives);
}
}
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