Mtolhuys\LaravelSchematics\Services\RuleParser

Complexity

Total Complexity

31

Size/Duplication

Total Lines	281
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

0

15 Methods

Rating	Name	Duplication	Size	Complexity
A	parseRule()	0	27	3
A	toRule()	0	33	1
A	fieldsToMigrationMethods()	0	25	3
A	getAdditionalUpMethods()	0	10	5
A	isMethodOnly()	0	9	1
A	getMethod()	0	10	3
A	getMax()	0	10	2
A	getRenameFrom()	0	14	3
A	isRequired()	0	6	3
A	isIncrements()	0	10	1
A	isUnique()	0	4	1
A	isUnsigned()	0	5	2
A	hasChanged()	0	4	1
A	isForeign()	0	4	1
A	ruleContains()	0	8	1

<?php

namespace Mtolhuys\LaravelSchematics\Services;

use Mtolhuys\LaravelSchematics\Models\Migration;

class RuleParser
{
    /**
     * @param $rule
     * @return string|null
     */
    public static function parseRule($rule = null)
    {
        if (! $rule) {
            return 'string|max:255';
        }

        $valid = array_diff(explode('|', $rule), [
            'mediumIncrements',
            'smallIncrements',
            'tinyIncrements',
            'rememberToken',
            'softDeletesTz',
            'bigIncrements',
            'renameColumn',
            'softDeletes',
            'dropColumn',
            'increments',
            'macAddress',
            'unsigned',
        ]);

        if (empty($valid)) {
            return null;
        }

        return self::toRule(implode('|', $valid));
    }

    /**
     * @param string $rawRules
     * @return string
     */
    public static function toRule(string $rawRules): string
    {
        $translations = [
            'unsignedInteger' => 'numeric',
            'mediumInteger' => 'numeric',
            'smallInteger' => 'numeric',
            'tinyInteger' => 'numeric',
            'bigInteger' => 'numeric',
            'macAddress'  => 'string',
            'integer' => 'numeric',
            'decimal' => 'numeric',
            'dateTimeTz' => 'date',
            'dateTime' => 'date',
            'timestampTz' => 'date',
            'timestamp' => 'date',
            'string' => 'string',
            'ipAddress' => 'ip',
            'enum' => 'numeric',
            'point' => 'numeric',
            'polygon' => 'numeric',
            'longText' => 'string',
            'text' => 'string',
            'json' => 'json',
            'jsonb' => 'json',
            'time' => 'date_format:H:i',
        ];

        return str_replace(
            array_keys($translations),
            array_values($translations),
            $rawRules
        );
    }
    /**
     * Parse the rules to column creation methods
     *
     * @param $fields
     * @return string
     */
    public static function fieldsToMigrationMethods(array $fields): string
    {
        $columns = '';

        foreach ($fields as $field) {
            $column = key($field);
            $rule = $field[$column];
            $break = PHP_EOL . str_repeat(' ', 12);

            if (self::isMethodOnly($rule)) {
                $columns .= "\$table->{$rule}();{$break}";

                continue;
            }

            $max = self::getMax($rule);
            $method = self::getMethod($rule);
            $oldName = self::getRenameFrom($rule);
            $additional = self::getAdditionalUpMethods($rule);

            $columns .= "\$table->{$method}({$oldName}'$column'{$max}){$additional}{$break}";
        }

        return $columns;
    }

    /**
     * @param $rule
     * @return string
     */
    public static function getAdditionalUpMethods($rule): string
    {
        $methods = '';
        $methods .= self::isUnsigned($rule) ? '->unsigned()' : '';
        $methods .= !self::isRequired($rule) ? '->nullable()' : '';
        $methods .= self::isUnique($rule) ? '->unique()' : '';
        $methods .= self::hasChanged($rule) ? '->change()' : '';

        return "$methods;";
    }

    /**
     * Check if $rule should be handled as single method
     *
     * @param $rule
     * @return mixed|string
     */
    public static function isMethodOnly($rule)
    {

        return self::ruleContains($rule, [
            'softDeletes',
            'rememberToken',
            'softDeletesTz',
        ]);
    }

    /**
     * Check if $rule contains any of the possible methods
     *
     * @param $rule
     * @return mixed|string
     */
    public static function getMethod($rule)
    {
        foreach (Migration::$methods as $method) {
            if (stripos($rule, strtolower($method)) !== false) {
                return $method;
            }
        }

        return 'string';
    }

    /**
     * Parses the max:* rule
     *
     * @param $rule
     * @return string
     */
    public static function getMax($rule): string
    {
        $max = (int)substr($rule, strpos($rule, 'max:') + 4);

        if ($max > 0) {
            return ", $max";
        }

        return '';
    }

    /**
     * Gets old name for renaming column
     *
     * @param $rule
     * @return string
     */
    public static function getRenameFrom($rule): string
    {
        foreach (explode('|', $rule) as $token) {
            $hasRenameRule = stripos($token, 'from:') !== false;

            if ($hasRenameRule) {
                $from = substr($token, strpos($token, 'from:') + 5);

                return "'$from', ";
            }
        }

        return '';
    }

    /**
     * Checks if column can be set to nullable
     *
     * @param $rule
     * @return boolean
     */
    public static function isRequired($rule): bool
    {
        return self::ruleContains($rule, ['required'])
            || self::isIncrements($rule)
            || self::isUnique($rule);
    }

    /**
     * Checks if columns needs to be set to unique
     *
     * @param $rule
     * @return boolean
     */
    public static function isIncrements($rule): bool
    {
        return self::ruleContains($rule, [
            'increments',
            'bigIncrements',
            'mediumIncrements',
            'smallIncrements',
            'tinyIncrements',
        ]);
    }

    /**
     * Checks if columns needs to be set to unique
     *
     * @param $rule
     * @return boolean
     */
    public static function isUnique($rule): bool
    {
        return self::ruleContains($rule, ['unique']);
    }

    /**
     * Checks if columns is unsigned
     *
     * @param $rule
     * @return boolean
     */
    public static function isUnsigned($rule): bool
    {
        return self::ruleContains($rule, ['unsigned'])
            && ! self::ruleContains($rule, ['unsignedInteger']);
    }


    /**
     * Checks if columns has changed
     *
     * @param $rule
     * @return boolean
     */
    public static function hasChanged($rule): bool
    {
        return self::ruleContains($rule, ['change']);
    }

    /**
     * Checks if columns needs to be constructed as a foreign key
     *
     * @param $rule
     * @return boolean
     */
    public static function isForeign($rule): bool
    {
        return self::ruleContains($rule, ['foreign']);
    }

    /**
     * For aesthetic reasons
     *
     * @param $rule
     * @param $needles
     * @return bool
     */
    private static function ruleContains($rule, array $needles): bool
    {
        return !empty(array_filter(
            array_map(static function ($rule) use ($needles) {
                return in_array($rule, $needles, true);
            }, explode('|', $rule))
        ));
    }
}