EntriesYamlParser.php

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<?php
/***
 * @author                        Timon Amstutz <timon.amstutz@ilub.unibe.ch>
 * @version                       $Id$
 *
 */
namespace ILIAS\UI\Implementation\Crawler;

use Symfony\Component\Yaml;
use ILIAS\UI\Implementation\Crawler\Entry as Entry;

class EntriesYamlParser implements YamlParser
{
    const PARSER_STATE_OUTSIDE = 1;
    const PARSER_STATE_ENTRY = 2;
    const PARSER_STATE_SEEKING_RETURN = 3;
    const PARSER_STATE_SEEKING_FUNCTION_NAME = 4;

    protected $items = array();

    protected $ef = null;

    protected $file_path = "none";

    public function __construct()
    {
        $this->ef = new Exception\Factory();
    }

    public function parseYamlStringArrayFromFile($filePath)
    {
        $this->file_path = $filePath;
        $content = $this->getFileContentAsString($filePath);
        return $this->parseYamlStringArrayFromString($content);
    }

    public function parseArrayFromFile($filePath)
    {
        $this->file_path = $filePath;
        $content = $this->getFileContentAsString($filePath);
        return $this->parseArrayFromString($content);
    }

    public function parseEntriesFromFile($filePath)
    {
        $this->file_path = $filePath;
        $content = $this->getFileContentAsString($filePath);
        return $this->parseEntriesFromString($content);
    }

    public function parseYamlStringArrayFromString($content)
    {
        return $this->getYamlEntriesFromString($content);
    }

    public function parseArrayFromString($content)
    {
        return $this->getPHPArrayFromYamlArray(
            $this->getYamlEntriesFromString($content)
        );
    }

    public function parseEntriesFromString($content)
    {
        $entries_array = $this->parseArrayFromString($content);
        return $this->getEntriesFromArray($entries_array);
    }

    protected function getFileContentAsString($filePath)
    {
        if (!file_exists($filePath)) {
            throw $this->ef->exception(Exception\CrawlerException::INVALID_FILE_PATH, $filePath);
        }
        $content = file_get_contents($filePath);
        if (!$content) {
            throw $this->ef->exception(Exception\CrawlerException::FILE_OPENING_FAILED, $filePath);
        }
        return $content;
    }

    protected function getYamlEntriesFromString($content)
    {
        $parser_state = self::PARSER_STATE_OUTSIDE;
        $current_entry = "";
        $yaml_entries = array();

        foreach (preg_split("/((\r?\n)|(\r\n?))/", $content) as $line) {
            if ($parser_state === self::PARSER_STATE_OUTSIDE) {
                if (preg_match('/---/', $line)) {
                    $current_entry = "";
                    $parser_state = self::PARSER_STATE_ENTRY;
                }
                if (preg_match('/\@return/', $line)) {
                    throw $this->ef->exception(
                        Exception\CrawlerException::ENTRY_WITH_NO_YAML_DESCRIPTION,
                        " in file: " . $this->file_path . ", " . $line
                    );
                }
                if (preg_match('/public function (.*)\(/', $line)) {
                    throw $this->ef->exception(
                        Exception\CrawlerException::ENTRY_WITH_NO_YAML_DESCRIPTION,
                        " in file: " . $this->file_path . ", " . $line
                    );
                }
            } elseif ($parser_state === self::PARSER_STATE_ENTRY) {
                if (!preg_match('/(\*$)|(---)/', $line)) {
                    $current_entry .= $this->purifyYamlLine($line);
                }
                if (preg_match('/---/', $line)) {
                    $parser_state = self::PARSER_STATE_SEEKING_RETURN;
                }
                if (preg_match('/\@return/', $line)) {
                    throw $this->ef->exception(
                        Exception\CrawlerException::ENTRY_WITH_NO_YAML_DESCRIPTION,
                        " in file: " . $this->file_path . ", " . $line
                    );
                }
                if (preg_match('/public function (.*)\(/', $line)) {
                    throw $this->ef->exception(
                        Exception\CrawlerException::ENTRY_WITH_NO_YAML_DESCRIPTION,
                        " in file: " . $this->file_path . ", " . $line
                    );
                }
            } elseif ($parser_state === self::PARSER_STATE_SEEKING_RETURN) {
                if (preg_match('/\@return/', $line)) {
                    $current_entry .= "namespace: " . ltrim($this->purifyYamlLine($line), '@return');
                    $parser_state = self::PARSER_STATE_SEEKING_FUNCTION_NAME;
                }
                if (preg_match('/---/', $line)) {
                    throw $this->ef->exception(
                        Exception\CrawlerException::ENTRY_WITH_NO_VALID_RETURN_STATEMENT,
                        " in file: " . $this->file_path . " line " . $current_entry
                    );
                }
                if (preg_match('/public function (.*)\(/', $line)) {
                    throw $this->ef->exception(
                        Exception\CrawlerException::ENTRY_WITH_NO_VALID_RETURN_STATEMENT,
                        " in file: " . $this->file_path . " line " . $current_entry
                    );
                }
            } else {
                if (preg_match('/public function (.*)\(/', $line, $matches)) {
                    preg_match('/public function (.*)\(/', $line, $matches);
                    $current_entry .= "function_name: " . $matches[1];
                    $yaml_entries[] = $current_entry;
                    $parser_state = self::PARSER_STATE_OUTSIDE;
                }
                if (preg_match('/---/', $line)) {
                    throw $this->ef->exception(
                        Exception\CrawlerException::ENTRY_WITHOUT_FUNCTION,
                        " in file: " . $this->file_path . " line " . $current_entry
                    );
                }
            }
        }
        if ($parser_state === self::PARSER_STATE_SEEKING_RETURN) {
            throw $this->ef->exception(
                Exception\CrawlerException::ENTRY_WITH_NO_VALID_RETURN_STATEMENT,
                " in file: " . $this->file_path . " line " . $current_entry
            );
        } elseif ($parser_state === self::PARSER_STATE_ENTRY) {
            throw $this->ef->exception(
                Exception\CrawlerException::ENTRY_WITH_NO_YAML_DESCRIPTION,
                " in file: " . $this->file_path
            );
        } elseif ($parser_state === self::PARSER_STATE_SEEKING_FUNCTION_NAME) {
            ;
            throw $this->ef->exception(
                Exception\CrawlerException::ENTRY_WITHOUT_FUNCTION,
                " in file: " . $this->file_path
            );
        }
        return $yaml_entries;
    }

    protected function purifyYamlLine($line)
    {
        return str_replace("* ", "", ltrim($line)) . PHP_EOL;
    }

    protected function getPHPArrayFromYamlArray($yaml_entries)
    {
        $entries = array();
        $parser = new Yaml\Parser();

        foreach ($yaml_entries as $yaml_entry) {
            try {
                $entries[] = $parser->parse($yaml_entry);
            } catch (\Exception $e) {
                throw $this->ef->exception(Exception\CrawlerException::PARSING_YAML_ENTRY_FAILED, " file: " . $this->file_path . "; " . $e);
            }
        }


        array_walk_recursive($entries, function (&$item) {
            $item = rtrim($item, PHP_EOL);
        });

        return $entries;
    }

    protected function getEntriesFromArray(array $entries_array)
    {
        $entries = new Entry\ComponentEntries();

        foreach ($entries_array as $entry_data) {
            $entries->addEntry($this->getEntryFromData($entry_data));
        }

        return $entries;
    }

    protected function getEntryFromData(array $entry_data)
    {
        $entry_data['title'] = self::fromCamelCaseToWords($entry_data['function_name']);

        if (!array_key_exists("title", $entry_data) || !$entry_data['title'] || $entry_data['title'] == "") {
            throw $this->ef->exception(Exception\CrawlerException::ENTRY_TITLE_MISSING, " File: " . $this->file_path);
        }
        if (!array_key_exists("namespace", $entry_data) || !$entry_data['namespace'] || $entry_data['namespace'] == "") {
            throw $this->ef->exception(Exception\CrawlerException::ENTRY_WITH_NO_VALID_RETURN_STATEMENT, " File: " . $this->file_path);
        }

        $entry_data['id'] = str_replace(
            "\\",
            "",
            str_replace("\\ILIAS\\UI\\", "", str_replace("\\ILIAS\\UI\\Component\\", "", $entry_data['namespace']))
        )
                . self::toUpperCamelCase($entry_data['title'], ' ');
        $entry_data['abstract'] = preg_match("/Factory/", $entry_data['namespace']);
        $entry_data['path'] = str_replace("/ILIAS", "src", str_replace("\\", "/", $entry_data['namespace']));

        try {
            $entry = new Entry\ComponentEntry($entry_data);
        } catch (\Exception $e) {
            throw $this->ef->exception(
                Exception\CrawlerException::PARSING_YAML_ENTRY_FAILED,
                " could not convert data to entry, message: '" . $e->getMessage() . "' file: " . $this->file_path
            );
        }

        return $entry;
    }

    public static function toUpperCamelCase($string, $seperator)
    {
        return str_replace($seperator, '', ucwords($string));
    }

    public static function toLowerCamelCase($string, $seperator)
    {
        return str_replace($seperator, '', lcfirst(ucwords($string)));
    }

    public static function fromCamelCaseToWords($camelCaseString)
    {
        return join(preg_split('/(?<=[a-z])(?=[A-Z])/x', ucwords($camelCaseString)), " ");
    }
}