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<?php

namespace Illuminate\Cache;

use Illuminate\Support\InteractsWithTime;

class ArrayStore extends TaggableStore
{
    use InteractsWithTime, RetrievesMultipleKeys;

/**
     * The array of stored values.
     *
     * @var array
     */
    protected $storage = [];

/**
     * Retrieve an item from the cache by key.
     *
     * @param  string|array  $key
     * @return mixed
     */
    public function get($key)
    {
        if (! isset($this->storage[$key])) {
            return;
        }

$item = $this->storage[$key];

$expiresAt = $item['expiresAt'] ?? 0;

if ($expiresAt !== 0 && $this->currentTime() > $expiresAt) {
            $this->forget($key);

return;
        }

return $item['value'];
    }

/**
     * Store an item in the cache for a given number of seconds.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @param  int  $seconds
     * @return bool
     */
    public function put($key, $value, $seconds)
    {
        $this->storage[$key] = [
            'value' => $value,
            'expiresAt' => $this->calculateExpiration($seconds),
        ];

return true;
    }

/**
     * Increment the value of an item in the cache.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @return int
     */
    public function increment($key, $value = 1)
    {
        if (! isset($this->storage[$key])) {
            $this->forever($key, $value);

return $this->storage[$key]['value'];
        }

$this->storage[$key]['value'] = ((int) $this->storage[$key]['value']) + $value;

return $this->storage[$key]['value'];
    }

/**
     * Decrement the value of an item in the cache.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @return int
     */
    public function decrement($key, $value = 1)
    {
        return $this->increment($key, $value * -1);
    }

/**
     * Store an item in the cache indefinitely.
     *
     * @param  string  $key
     * @param  mixed   $value
     * @return bool
     */
    public function forever($key, $value)
    {
        return $this->put($key, $value, 0);
    }

/**
     * Remove an item from the cache.
     *
     * @param  string  $key
     * @return bool
     */
    public function forget($key)
    {
        if (array_key_exists($key, $this->storage)) {
            unset($this->storage[$key]);

return true;
        }

return false;
    }

/**
     * Remove all items from the cache.
     *
     * @return bool
     */
    public function flush()
    {
        $this->storage = [];

return true;
    }

/**
     * Get the cache key prefix.
     *
     * @return string
     */
    public function getPrefix()
    {
        return '';
    }

/**
     * Get the expiration time of the key.
     *
     * @param  int  $seconds
     * @return int
     */
    protected function calculateExpiration($seconds)
    {
        return $this->toTimestamp($seconds);
    }

/**
     * Get the UNIX timestamp for the given number of seconds.
     *
     * @param  int  $seconds
     * @return int
     */
    protected function toTimestamp($seconds)
    {
        return $seconds > 0 ? $this->availableAt($seconds) : 0;
    }
}