<?php

// Method in the ImportService, called during CSV import
    private function autoAssignCategory(array $position, array $importRules) {
        $categoryId = null;

        foreach ($importRules as $rule) {
            if ($rule->appliesToPosition($position)) {
                $categoryId = $rule->getCategoryId();
                break;
            }
        }

        return $categoryId;
    }



// ImportRule as returned by the ImportRuleService

class ImportRule {

    /** @var int */
    private $categoryId;

    /** @var string */
    private $categoryName;

    /** @var array */
    private $rules;


    public function __construct(int $categoryId, string $categoryName, array $rules) {
        $this->categoryId = $categoryId;
        $this->categoryName = $categoryName;
        $this->rules = $rules;
    }

    public function getCategoryId(): int {
        return $this->categoryId;
    }

    public function getCategoryName(): string {
        return $this->categoryName;
    }

    public function getRules(): array {
        return $this->rules;
    }

    public function setRules(array $rules) {
        $this->rules = $rules;
    }

    public function appliesToPosition(array $position) {
        foreach ($this->rules as $rule) {
            if (array_key_exists($rule->field, $position)) {
                if (property_exists($rule, 'regex') && !preg_match($rule->regex, $position[$rule->field])) {
                    return false;
                } else if (property_exists($rule, 'value') && (trim($position[$rule->field]) != trim($rule->value))) {
                    return false;
                }
            } else {
                // Field does not exist, so we skip this rule
                return false;
            }
        }
        return true;
    }

}