Suilven\RandomEnglish\RandomEnglishGenerator

Complexity

Total Complexity

27

Size/Duplication

Total Lines	312
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

0

17 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	setConfig()	0	4	1
A	sentence()	0	23	2
A	title()	0	4	1
A	paragraph()	0	11	2
A	pluralNoun()	0	6	1
A	verbing()	0	7	1
A	pluralNounCheck()	0	10	2
A	ingVerbCheck()	0	10	2
A	augmentIfPluralNoun()	0	9	2
A	augmentIfIngVerb()	0	9	2
A	augmentSentenceTitleCase()	0	9	2
A	makeArrayIntoSentence()	0	10	1
A	fixEndOfSentence()	0	5	1
A	getRandomWord()	0	8	1
A	getWordOrRandomWord()	0	31	4
A	chooseRandomWord()	0	25	1

<?php declare(strict_types = 1);

namespace Suilven\RandomEnglish;

use Suilven\RandomEnglish\Helper\LanguageHelper;

class RandomEnglishGenerator
{

    private const POSSIBLE_WORD_TYPES = [
        'noun',
        'countable_noun',

        'adjective',
        'preposition',
        'conjunction',
        'contraction',
        'control_verb',

        'sequence_adverb',
        'frequency_adverb',

        // pluralize and ing these?
        'intransitive_verb',
        'irregular_verb',
        'transitive_verb',
        'verb',
        'adverb',

        'intransitive_verb_ing',
        'irregular_verb_ing',
        'transitive_verb_ing',
        'verb_ing',


        // positions
        'locative',

        'plural_noun',


        // names
        'mens_name',
        'womens_name',
        'country',
        'colour',
    ];

    /** @var string configuration file for sentences */
    private $config = '';

    public function __construct()
    {
        $configFile = \dirname(__FILE__) . '/../config/sentence-structure.cfg';
        $this->setConfig(\file_get_contents($configFile));
    }


    /** @param string $newConfig configuration file of how sentence structures */
    public function setConfig(string $newConfig): void
    {
        $this->config = \trim($newConfig);
    }


    /**
     * Generate a random sentence
     *
     * @param bool $titleCase true to generate a title, false (default) to generate a sentence
     * @return string a random sentence
     */
    public function sentence(bool $titleCase = false): string
    {
        // choose a random sentence structure
        $structures = \explode(\PHP_EOL, $this->config);
        \shuffle($structures);
        $structure = $structures[0];

        $expression = '/[\s]+/';
        $splits = \preg_split($expression, $structure, -1, \PREG_SPLIT_NO_EMPTY);

        $sentenceArray = [];

        /** @var string $possiblyRandomWord */
        foreach ($splits as $possiblyRandomWord) {
            $word = $this->getWordOrRandomWord($possiblyRandomWord);
            $sentenceArray[] = $word;
        }

        $result = $this->makeArrayIntoSentence($sentenceArray);
        $this->augmentSentenceTitleCase($titleCase, $result);

        return $result;
    }


    /**
     * Generate a random title
     *
     * @return string a random sentence, all in caps, no trailing full stop
     */
    public function title(): string
    {
        return $this->sentence(true);
    }


    /**
     * @param int $maxSentences The maximum number of sentences
     * @return string a paragraph of random sentences
     */
    public function paragraph(int $maxSentences = 10): string
    {
        $nParagraph = \rand(1, $maxSentences);
        $sentences = [];

        for ($i = 0; $i < $nParagraph; $i++) {
            $sentences[] = $this->sentence();
        }

        return \implode("  ", $sentences);
    }


    /** @return string a plural noun */
    public function pluralNoun(): string
    {
        $plurableNoun = $this->getRandomWord('countable_noun');

        return $plurableNoun . 's';
    }


    /** @return string the ing version of a verb, e.g. run -> running */
    public function verbing(): string
    {
        // @todo Choose a random verb source file
        $ingVerb = $this->getRandomWord('verb');

        return $ingVerb . 'ing';
    }


    /**
     * @param string $wordType The word type, e.g. 'noun' or 'verb'
     * @return bool true if this is a plural noun
     */
    public function pluralNounCheck(string &$wordType, string &$possiblyRandomWord): bool
    {
        $pluralNoun = ($wordType === 'plural_noun');
        if ($pluralNoun) {
            $wordType = 'noun';
            $possiblyRandomWord = \str_replace('plural_', '', $possiblyRandomWord);
        }

        return $pluralNoun;
    }


    /** @return bool true if this is a verb with ing */
    public function ingVerbCheck(string &$wordType, string &$possiblyRandomWord): bool
    {
        $ing = \substr($wordType, -4) === '_ing';
        if ($ing) {
            $wordType = \str_replace('_ing', '', $wordType);
            $possiblyRandomWord = \str_replace('_ing', '', $possiblyRandomWord);
        }

        return $ing;
    }


    public function augmentIfPluralNoun(bool $pluralNoun, string &$randomWord): void
    {
        if (!$pluralNoun) {
            return;
        }

        $helper = new LanguageHelper();
        $randomWord = $helper->pluralizeNoun($randomWord);
    }


    public function augmentIfIngVerb(bool $ing, string &$randomWord): void
    {
        if (!$ing) {
            return;
        }

        $helper = new LanguageHelper();
        $randomWord = $helper->ingVerb($randomWord);
    }


    public function augmentSentenceTitleCase(bool $titleCase, string &$result): void
    {
        if (!$titleCase) {
            return;
        }

        $result = \ucwords($result);
        $result = \substr_replace($result, "", -1);
    }


    /**
     * Convert an array of strings into a sentence
     * 1) Capitalize first letter
     * 2) Glue words together with a space
     * 3) Add a full stop
     * 4) Deal with diferent sentence endings such as ! or ?
     *
     * @param array<string> $sentenceArray a sentence whose words are in an array of strings
     * @return string a sentence
     */
    public function makeArrayIntoSentence(array $sentenceArray): string
    {
        // ensure sentence starts with a capital
        $sentenceArray[0] = \ucfirst($sentenceArray[0]);

        $sentence = \implode(" ", $sentenceArray) . '.';
        $this->fixEndOfSentence($sentence);

        return $sentence;
    }


    /**
     * If a sentence ended with a question or exclamation mark prior to having a full stop appended, deal with it
     *
     * @param string $result The sentence, by reference, prior to being fixed
     */
    public function fixEndOfSentence(string &$result): void
    {
        $result = \str_replace('?.', '?', $result);
        $result = \str_replace('!.', '?', $result);
    }


    /**
     * @param string $wordType the type of word, e.g. noun, verb
     * @return string a random word for the given word type
     */
    private function getRandomWord(string $wordType): string
    {
        $wordsFile = \dirname(__FILE__) . '/../words/english_' . $wordType . 's.txt';
        $words = \explode(\PHP_EOL, \trim(\file_get_contents($wordsFile)));
        \shuffle($words);

        return $words[0];
    }


    /** @return string the above string as is, or a possibly randomized version, e.g. a random noun */
    private function getWordOrRandomWord(string $possiblyRandomWord): string
    {
        $result = $possiblyRandomWord;

        if (\strstr($possiblyRandomWord, '|')) {
            $splits = \explode('|', $possiblyRandomWord);
            \shuffle($splits);
            $result = $splits[0];
        } else {
            foreach (self::POSSIBLE_WORD_TYPES as $wordType) {
                $pluralNoun = $this->pluralNounCheck($wordType, $possiblyRandomWord);
                $ing = $this->ingVerbCheck($wordType, $possiblyRandomWord);

                $start = '[' . $wordType . ']';

                // check the start of the word as it may be suffixed by likes of a question of exclamation mark.
                // If no match for the possible word type continue until the next one
                if (\substr($possiblyRandomWord, 0, \strlen($start)) !== $start) {
                    continue;
                }

                // ---- we are now getting a random word from a file ----
                $result = $this->chooseRandomWord($possiblyRandomWord, $wordType, $pluralNoun, $ing);

                break;
            }
        }

        // no randomized word has been found, aka no [verb] or [noun], thus append the possibly random word as is
        return $result;
    }


    /**
     * @param string $wordType noun, verb, adjective etc
     * @param bool $pluralizeNoun if true pluralize a noun
     * @param bool $makeVerbIng if true make a verb an ing verb, e.g. run -> running
     */
    private function chooseRandomWord(
        string $randomWordTypeWithSuffix,
        string $wordType,
        bool $pluralizeNoun,
        bool $makeVerbIng
    ): string {
        $start = '[' . $wordType . ']';
       // error_log('WT:' . $randomWordTypeWithSuffix);

        // note the suffix of the word, and append this to the random word
        $restOfWord = \str_replace($start, '', $randomWordTypeWithSuffix);

        // This avoids having to use 'countrie' in the sentence structure file : country -> countries
        $wordType = \str_replace('country', 'countrie', $wordType);

        /** @var string $randomWord */
        $randomWord = $this->getRandomWord($wordType);

        // augment the random word if a plural noun or an ing verb
        $this->augmentIfPluralNoun($pluralizeNoun, $randomWord);
        $this->augmentIfIngVerb($makeVerbIng, $randomWord);

        // add the random word, and then the suffix of the word such as ?! or !!
        return $randomWord . $restOfWord;
    }
}