每天laravel-20160701|Repository

<?php

namespace Illuminate\Cache;

use Closure;
use DateTime;
use ArrayAccess;
use Carbon\Carbon;
use BadMethodCallException;
use Illuminate\Contracts\Cache\Store;
use Illuminate\Support\Traits\Macroable;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Contracts\Cache\Repository as CacheContract;
// a namespace be used enough
class Repository implements CacheContract, ArrayAccess
{// two interface that should be implements by Repository
    use Macroable {
        __call as macroCall;
    }// use Macroable that we will be a __call

    /** * The cache store implementation. * The cache store * @var \Illuminate\Contracts\Cache\Store */
    protected $store;// a Cache Store instance of the implementation

    /** * The event dispatcher implementation. * * @var \Illuminate\Contracts\Events\Dispatcher */
    protected $events;// The event dispatcher implementation a events interface

    /** * The default number of minutes to store items. * * @var int */
    protected $default = 60; // a normal time[minutes]or[seconds] to set the value into the store items .
    // normal set it is 60 second

    /** * Create a new cache repository instance. * * @param \Illuminate\Contracts\Cache\Store $store * @return void */
    public function __construct(Store $store)
    {
        $this->store = $store;
    }// a big __set to Create a new instance about Cache, repository
    // a library to store.

    /** * Set the event dispatcher instance. * * @param \Illuminate\Contracts\Events\Dispatcher $events * @return void */
    public function setEventDispatcher(Dispatcher $events)
    {
        $this->events = $events;
    }// Set the event dispatcher instance.
    // a big set to the events.

    /** * Fire an event for this cache instance. * * @param string $event * @param array $payload * @return void */
    // Fire an event for this cache instance.
    protected function fireCacheEvent($event, $payload)// fire cache event
    {
        if (! isset($this->events)) {
            return;
        }// check this is a normal events

        switch ($event) {// this->events is a instance about a class, then the events is a way or a type
            case 'hit':// case hit:
                if (count($payload) == 2) {
                    $payload[] = [];
                }

                return $this->events->fire(new Events\CacheHit($payload[0], $payload[1], $payload[2]));
            case 'missed':// case missed:
                if (count($payload) == 1) {
                    $payload[] = [];
                }

                return $this->events->fire(new Events\CacheMissed($payload[0], $payload[1]));
            case 'delete':// case delete:
                if (count($payload) == 1) {
                    $payload[] = [];
                }

                return $this->events->fire(new Events\KeyForgotten($payload[0], $payload[1]));
            case 'write':// cache write:
                if (count($payload) == 3) {
                    $payload[] = [];
                }

                return $this->events->fire(new Events\KeyWritten($payload[0], $payload[1], $payload[2], $payload[3]));
        }
    }// a switch way to change the result

    /** * Determine if an item exists in the cache. * * @param string $key * @return bool */
    public function has($key)
    {
        return ! is_null($this->get($key));
    }// determine[check] the item has exists in the cache.

    /** * Retrieve an item from the cache by key. Retrieve an item from the cache by key. * * @param string $key * @param mixed $default * @return mixed */
    public function get($key, $default = null)// get item by key.
    {
        if (is_array($key)) {
            return $this->many($key);
        }// the key is a array ,will back a item array by many.

        $value = $this->store->get($this->itemKey($key));// get item[value] by key

        if (is_null($value)) {// null the value
            $this->fireCacheEvent('missed', [$key]);//missed

            $value = value($default);
        } else {
            $this->fireCacheEvent('hit', [$key, $value]);// hit
        }

        return $value;
    }

    /** * Retrieve multiple items from the cache by key.// Retrieve multiple items from the cache * * Items not found in the cache will have a null value.// items not found in the cache will have a null value * * @param array $keys * @return array */
    public function many(array $keys)
    {
        $normalizedKeys = [];

        foreach ($keys as $key => $value) {
            $normalizedKeys[] = is_string($key) ? $key : $value;
        }

        $values = $this->store->many($normalizedKeys);

        foreach ($values as $key => &$value) {
            if (is_null($value)) {
                $this->fireCacheEvent('missed', [$key]);

                $value = isset($keys[$key]) ? value($keys[$key]) : null;
            } else {
                $this->fireCacheEvent('hit', [$key, $value]);
            }
        }

        return $values;
    }








































    // 2016-04-05
    /** * Retrieve an item from the cache and delete it. * * @param string $key * @param mixed $default * @return mixed */
    public function pull($key, $default = null)// Retrieve an item from the cache and delete it.
    {// like pop push , pull
        $value = $this->get($key, $default);// first we will get value by key

        $this->forget($key);// then forget the key, the same to delete the item by key

        return $value;// return the key
    }

    /** * Store an item in the cache. * * @param string $key * @param mixed $value * @param \DateTime|int $minutes * @return void */
    public function put($key, $value, $minutes = null)// Store an item in the cache.
    {
        if (is_array($key) && filter_var($value, FILTER_VALIDATE_INT) !== false) {
            return $this->putMany($key, $value);
        }// if is a array and check the filter var has int, the return putMany

        $minutes = $this->getMinutes($minutes);// change minutes to you wants

        if (! is_null($minutes)) {// check has times [minutes]
            $this->store->put($this->itemKey($key), $value, $minutes);// put key

            $this->fireCacheEvent('write', [$key, $value, $minutes]);// fire cache event
        }
    }// to set a item in cache use a key

    /** * Store multiple items in the cache for a given number of minutes. * * @param array $values * @param int $minutes * @return void */
    public function putMany(array $values, $minutes)// Store multiple item in the cache for a
    {// given number of minutes
        $minutes = $this->getMinutes($minutes);// get a normal time

        if (! is_null($minutes)) {// has time
            $this->store->putMany($values, $minutes);// use a api to set way

            foreach ($values as $key => $value) {
                $this->fireCacheEvent('write', [$key, $value, $minutes]);
            }// a long a way to check the write event
        }
    }

    /** * Store an item in the cache if the key does not exist. * * @param string $key * @param mixed $value * @param \DateTime|int $minutes * @return bool */
    public function add($key, $value, $minutes)// Store an item in the cache if the key does not exist.
    {// add values by key in to the cache
        $minutes = $this->getMinutes($minutes);// get a minutes

        if (is_null($minutes)) {
            return false;
        }// no time no value

        if (method_exists($this->store, 'add')) {
            return $this->store->add($this->itemKey($key), $value, $minutes);
        }// check has the add method, or done null

        if (is_null($this->get($key))) {// no value
            $this->put($key, $value, $minutes);// put a key and value

            return true;
        }

        return false;
    }

    /** * Store an item in the cache indefinitely. * * @param string $key * @param mixed $value * @return void */
    public function forever($key, $value)// Store an item in the cache indefinitely
    {
        $this->store->forever($this->itemKey($key), $value);// use api to set the key forever

        $this->fireCacheEvent('write', [$key, $value, 0]);// send a event to
    }

    /** * Get an item from the cache, or store the default value. * * @param string $key * @param \DateTime|int $minutes * @param \Closure $callback * @return mixed */
    // Get an item from the cache ,or store the default value.
    public function remember($key, $minutes, Closure $callback)
    {
        // If the item exists in the cache we will just return this immediately
        // otherwise we will execute the given Closure and cache the result
        // of that execution for the given number of minutes in storage.
        if (! is_null($value = $this->get($key))) {
            return $value;
        }// has the item then back it

        $this->put($key, $value = $callback(), $minutes);// set the

        return $value;
    }// a number to be remember

    /** * Get an item from the cache, or store the default value forever. * * @param string $key * @param \Closure $callback * @return mixed */
    public function sear($key, Closure $callback)
    {
        return $this->rememberForever($key, $callback);
    }// Get an item from the cache, or store the default value forever
    // like a 38 women, has the key ,i use it,or i will set a default value,like kill it,
    // even a forever

    /** * Get an item from the cache, or store the default value forever. * Get an item from the cache, or store the * @param string $key * @param \Closure $callback * @return mixed */
    // a method like sear ,means to remember Forever
    public function rememberForever($key, Closure $callback)
    {
        // If the item exists in the cache we will just return this immediately
        // otherwise we will execute the given Closure and cache the result
        // of that execution for the given number of minutes. It's easy.
        if (! is_null($value = $this->get($key))) {
            return $value;
        }

        $this->forever($key, $value = $callback());

        return $value;
    }// if the item exists in the cache we will just return this immediately
    // otherwise we will execute the given Closure and cache the result of that execution for
    // the given of minutes ,it is easy

    /** * Remove an item from the cache. * * @param string $key * @return bool */
    public function forget($key)// delete or remove or forget an item from the cache
    {
        $success = $this->store->forget($this->itemKey($key));// a api to forget

        $this->fireCacheEvent('delete', [$key]);// fire event deltet

        return $success;// get result, more time it is success!
    }

    /** * Begin executing a new tags operation if the store supports it. * * @param array|mixed $names * @return \Illuminate\Cache\TaggedCache * * @throws \BadMethodCallException */
    public function tags($names)// Begin executing a new tags operation if the store supports it.
    {
        if (method_exists($this->store, 'tags')) {// check has the method tags
            $taggedCache = $this->store->tags($names);// change the name to

            if (! is_null($this->events)) {
                $taggedCache->setEventDispatcher($this->events);
            }

            $taggedCache->setDefaultCacheTime($this->default);

            return $taggedCache;// set Default Cache then
        }

        throw new BadMethodCallException('This cache store does not support tagging.');
    }

    /** * Format the key for a cache item. * * @param string $key * @return string */
    protected function itemKey($key)
    {
        return $key;
    }// Format the key for a cache item. but do nothing

    /** * Get the default cache time. * * @return int */
    public function getDefaultCacheTime()
    {
        return $this->default;// a default about time
    }// Get the default cache time.

    /** * Set the default cache time in minutes. * * @param int $minutes * @return void */
    public function setDefaultCacheTime($minutes)
    {
        $this->default = $minutes;
    }// Set the default cache time in minutes.

    /** * Get the cache store implementation. * * @return \Illuminate\Contracts\Cache\Store */
    public function getStore()
    {
        return $this->store;// back an instance
    }// get the cache store implementation.

    /** * Determine if a cached value exists. * * @param string $key * @return bool */
    public function offsetExists($key)
    {
        return $this->has($key);// check has a key
    }// Determine if a cached value exists

    /** * Retrieve an item from the cache by key. * * @param string $key * @return mixed */
    public function offsetGet($key)
    {
        return $this->get($key);
    }// Retrieve an item from the cache by key.

    /** * Store an item in the cache for the default time. * * @param string $key * @param mixed $value * @return void */
    public function offsetSet($key, $value)
    {
        $this->put($key, $value, $this->default);
    }// Store an item in the

    /** * Remove an item from the cache. * * @param string $key * @return void */
    public function offsetUnset($key)
    {
        $this->forget($key);
    }// a remove an item from the cache. method

    /** * Calculate the number of minutes with the given duration. * * @param \DateTime|int $duration * @return int|null */
    protected function getMinutes($duration)
    {
        if ($duration instanceof DateTime) {
            $fromNow = Carbon::now()->diffInMinutes(Carbon::instance($duration), false);

            return $fromNow > 0 ? $fromNow : null;
        }

        return is_string($duration) ? (int) $duration : $duration;
    }// Calculate the number of minutes with the given duration.
    // get time duration for a int times

    /** * Handle dynamic calls into macros or pass missing methods to the store. * Handle dynamic calls into macros or pass missing methods to the store. * @param string $method * @param array $parameters * @return mixed */
    // dynamic calls into macros or pass missing methods
    public function __call($method, $parameters)
    {
        if (static::hasMacro($method)) {
            return $this->macroCall($method, $parameters);
        }// static:: method to check has a method

        return call_user_func_array([$this->store, $method], $parameters);
    }// call_user_func_array()

    /** * Clone cache repository instance. * * @return void */
    public function __clone()
    {
        $this->store = clone $this->store;
    }// Clone cache repository instance.
}