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<?php |
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namespace Turahe\Counters\Classes; |
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use Turahe\Counters\Models\Counter; |
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use Turahe\Counters\Exceptions\CounterDoesNotExist; |
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use Turahe\Counters\Exceptions\CounterAlreadyExists; |
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/** |
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* Class Counters. |
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* @package Turahe\Counters\Classes |
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*/ |
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class Counters |
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{ |
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/** |
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* @param $key |
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* @param $name |
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* @param int $initial_value |
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* @param int $step |
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* Creating a record in counters table with $key, $name, $inital_value, $step |
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*/ |
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public function create($key, $name, $initial_value = 0, $step = 1) |
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{ |
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$value = $initial_value; |
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try { |
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Counter::query()->create( |
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compact('key', 'name', 'initial_value', 'step', 'value') |
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); |
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} catch (\Exception $e) { |
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throw CounterAlreadyExists::create($key); |
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} |
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} |
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/** |
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* @param $key |
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* @return \Illuminate\Database\Eloquent\Builder|\Illuminate\Database\Eloquent\Model|Counter |
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* Get a counter object for the given $key |
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*/ |
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public function get($key) |
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{ |
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$counter = Counter::query()->where('key', $key)->first(); |
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if (is_null($counter)) { |
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throw CounterDoesNotExist::create($key); |
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} |
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return $counter; |
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} |
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/** |
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* @param $key |
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* @param null $default |
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* @return mixed|null|string |
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* get the counter value for the given $key, |
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* $default will be returned in case the key is not found |
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*/ |
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public function getValue($key, $default = null) |
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{ |
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$counter = Counter::query()->where('key', $key)->first(); |
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if ($counter) { |
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return $counter->value; |
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} elseif (! is_null($default)) { |
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return $default; |
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} |
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throw CounterDoesNotExist::create($key); |
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} |
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/** |
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* @param $key |
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* @param $value |
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* set the value of the given counter's key |
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*/ |
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public function setValue($key, $value) |
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{ |
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Counter::query()->where('key', $key)->update(['value' => $value]); |
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} |
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/** |
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* @param $key |
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* @param $step |
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* set the step value for a given counter's |
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*/ |
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public function setStep($key, $step) |
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{ |
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Counter::query()->where('key', $key)->update(['step' => $step]); |
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} |
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/** |
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* @param $key |
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* @param null $step |
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* @return \Illuminate\Database\Eloquent\Model|Counters|null |
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* increment the counter with the step |
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*/ |
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public function increment($key, $step = null) |
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{ |
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$counter = $this->get($key); |
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if ($counter) { |
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$counter->update(['value' => $counter->value + ($step ?? $counter->step)]); |
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} |
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return $counter; |
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} |
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/** |
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* @param $key |
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* @param null $step |
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* @return \Illuminate\Database\Eloquent\Model|Counters|null |
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* decrement the counter with the step |
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*/ |
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public function decrement($key, $step = null) |
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{ |
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$counter = $this->get($key); |
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if ($counter) { |
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$counter->update(['value' => $counter->value - ($step ?? $counter->step)]); |
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} |
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return $counter; |
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} |
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/** |
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* @param $key |
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* @return \Illuminate\Database\Eloquent\Model|Counters|null |
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*/ |
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public function reset($key) |
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{ |
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$counter = $this->get($key); |
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if ($counter) { |
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$counter->update(['value' => $counter->initial_value]); |
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} |
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return $counter; |
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} |
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/** |
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* @param $key |
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* This function will store a cookie for the counter key |
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* If the cookie already exist, the counter will not incremented again |
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* @param null $step |
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*/ |
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public function incrementIfNotHasCookies($key, $step = null) |
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{ |
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$cookieName = $this->getCookieName($key); |
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if (! array_key_exists($cookieName, $_COOKIE)) { |
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$this->increment($key, $step); |
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setcookie($cookieName, 1); |
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} |
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} |
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/** |
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* @param $key |
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* This function will store a cookie for the counter key |
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* If the cookie already exist, the counter will not decremented again |
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* @param null $step |
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*/ |
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public function decrementIfNotHasCookies($key, $step = null) |
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{ |
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$cookieName = $this->getCookieName($key); |
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if (! array_key_exists($cookieName, $_COOKIE)) { |
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$this->decrement($key, $step); |
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setcookie($cookieName, 1); |
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} |
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} |
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/** |
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* @param $key |
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* @return string |
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*/ |
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private function getCookieName($key) |
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{ |
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return 'counters-cookie-'.$key; |
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} |
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} |
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