<?php

namespace Matrix\Operators;

use Matrix\Matrix;
use \Matrix\Builder;
use Matrix\Exception;
use Throwable;

class Multiplication extends Operator
{
    /**
     * Execute the multiplication
     *
     * @param mixed $value The matrix or numeric value to multiply the current base value by
     * @throws Exception If the provided argument is not appropriate for the operation
     * @return $this The operation object, allowing multiple multiplications to be chained
     **/
    public function execute($value, string $type = 'multiplication'): Operator
    {
        if (is_array($value)) {
            $value = new Matrix($value);
        }

        if (is_object($value) && ($value instanceof Matrix)) {
            return $this->multiplyMatrix($value, $type);
        } elseif (is_numeric($value)) {
            return $this->multiplyScalar($value, $type);
        }

        throw new Exception("Invalid argument for $type");
    }

    /**
     * Execute the multiplication for a scalar
     *
     * @param mixed $value The numeric value to multiply with the current base value
     * @return $this The operation object, allowing multiple mutiplications to be chained
     **/
    protected function multiplyScalar($value, string $type = 'multiplication'): Operator
    {
        try {
            for ($row = 0; $row < $this->rows; ++$row) {
                for ($column = 0; $column < $this->columns; ++$column) {
                    $this->matrix[$row][$column] *= $value;
                }
            }
        } catch (Throwable $e) {
            throw new Exception("Invalid argument for $type");
        }

        return $this;
    }

    /**
     * Execute the multiplication for a matrix
     *
     * @param Matrix $value The numeric value to multiply with the current base value
     * @return $this The operation object, allowing multiple mutiplications to be chained
     * @throws Exception If the provided argument is not appropriate for the operation
     **/
    protected function multiplyMatrix(Matrix $value, string $type = 'multiplication'): Operator
    {
        $this->validateReflectingDimensions($value);

        $newRows = $this->rows;
        $newColumns = $value->columns;
        $matrix = Builder::createFilledMatrix(0, $newRows, $newColumns)
            ->toArray();
        try {
            for ($row = 0; $row < $newRows; ++$row) {
                for ($column = 0; $column < $newColumns; ++$column) {
                    $columnData = $value->getColumns($column + 1)->toArray();
                    foreach ($this->matrix[$row] as $key => $valueData) {
                        $matrix[$row][$column] += $valueData * $columnData[$key][0];
                    }
                }
            }
        } catch (Throwable $e) {
            throw new Exception("Invalid argument for $type");
        }
        $this->matrix = $matrix;

        return $this;
    }
}

• [F] Addition.php
  Delete
• [F] DirectSum.php
  Delete
• [F] Division.php
  Delete
• [F] Multiplication.php
  Delete
• [F] Operator.php
  Delete
• [F] Subtraction.php
  Delete

Blog Section

Discover the Latest in Digital Payments and NFC Technology

Dive into our blog to explore the cutting-edge trends in digital payments and NFC technology. Stay updated on the innovations that are revolutionizing transactions, boosting security, and making payments quicker and more convenient. Learn how these advancements are shaping the future of financial interactions and driving the global transition towards a cashless world.

The Rise of Contactless Payments:...

In recent years, contactless payments have surged in popularity, driven...

Visit Blog

March 27, 2024

Enhancing Payment Security: The Role...

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational...

Visit Blog

March 27, 2024

The Future of Digital Wallets:...

Digital wallets have fundamentally transformed how we manage money, offering a streamlined, secure, and highly...

Visit Blog

March 27, 2024