改进 Drops 计算

app/Helpers.php

@@ -1,8 +1,67 @@
 <?php
 
 use Illuminate\Support\Carbon;
+use Illuminate\Support\Facades\Cache;
 
 function now($timezone = null)
 {
     return Carbon::now($timezone);
 }
+
+function getDrops($user_id)
+{
+    $cache_key = 'user_drops_' . $user_id;
+
+    $decimal = config('drops.decimal');
+
+    // 计算需要乘以多少
+    $multiple = 1;
+    for ($i = 0; $i < $decimal; $i++) {
+        $multiple *= 10;
+    }
+
+
+    $drops = Cache::get($cache_key) / (config('drops.decimal') * $multiple);
+
+    return $drops;
+}
+
+function reduceDrops($user_id, $amount = 0)
+{
+    $cache_key = 'user_drops_' . $user_id;
+
+    $decimal = config('drops.decimal');
+
+    // 计算需要乘以多少
+    $multiple = 1;
+    for ($i = 0; $i < $decimal; $i++) {
+        $multiple *= 10;
+    }
+
+    $amount = $amount * $multiple;
+
+    $drops = Cache::decrement($cache_key, $amount);
+
+    return $drops;
+}
+
+
+function addDrops($user_id, $amount = 0)
+{
+    $cache_key = 'user_drops_' . $user_id;
+
+    $decimal = config('drops.decimal');
+
+    // 计算需要乘以多少
+    $multiple = 1;
+    for ($i = 0; $i < $decimal; $i++) {
+        $multiple *= 10;
+    }
+
+    $amount = $amount * $multiple;
+
+    $drops = Cache::increment($cache_key, $amount);
+
+    return $drops;
+}
+

app/Http/Controllers/UserController.php

@@ -12,7 +12,8 @@ public function index(Request $request)
     {
         $user = $request->user();
 
-        $user['drops'] = (float) Cache::get('user_drops_' . $user['id'], 0);
+        $user['drops'] = getDrops($user['id']);
+        $user['drops_rate'] = config('drops.rate');
 
         return $this->success($user);
     }

app/Models/Host.php

@@ -78,19 +78,13 @@ public function cost($price = null)
     {
         $this->load('user');
 
-        $cache_key = 'user_drops_' . $this->user_id;
+        $drops = getDrops($this->user_id);
-
-        $drops = Cache::get($cache_key);
-
 
         if ($price !== null) {
             $this->price = $price;
         }
 
-
+        $amount = $price / config('drops.rate') + 1;
-        $amount = $price / Cache::get('drops_rate', 100) + 1;
-        $amount = intval(log10(abs($amount)) / 3);
-
 
         // if drops <= price
         if ($drops < $this->price) {
@@ -99,7 +93,7 @@ public function cost($price = null)
                 $need = $this->price - $drops;
 
                 // 算出需要补充多少余额
-                $need_amount = $need / Cache::get('drops_rate', 100) + 1;
+                $need_amount = $need / config('drops.rate') + 1;
 
                 $this->user->toDrops($amount + $need_amount);
             } catch (BalanceNotEnoughException) {
@@ -115,11 +109,7 @@ public function cost($price = null)
             ]);
         }
 
-        $this->price = intval(log10(abs($this->price)) / 3);
+        reduceDrops($this->user_id, $this->price);
-
-        echo $this->price;
-
-        Cache::decrement($cache_key, $this->price);
 
         return true;
     }

app/Models/User.php

@@ -46,10 +46,11 @@ class User extends Model implements AuthenticatableContract, AuthorizableContrac
 
     public function toDrops($amount = 1)
     {
-        $rate = Cache::get('drops_rate', 100);
+        $rate = config('drops.rate');
+
         $cache_key = 'user_drops_' . $this->id;
 
-        $drops = Cache::get($cache_key, 0);
+        $drops = getDrops($this->id);
 
         $total = 0;
 
@@ -59,7 +60,6 @@ public function toDrops($amount = 1)
 
         $total += $amount * $rate;
 
-
         $lock = Cache::lock("lock_" . $cache_key, 5);
         try {
             $lock->block(5);
@@ -67,8 +67,7 @@ public function toDrops($amount = 1)
             $this->balance -= $amount;
             $this->save();
 
-            // increment user drops
+            addDrops($this->id, $total);
-            Cache::increment($cache_key, $total);
 
             // if user balance <= 0
             if ($this->balance < $amount) {

app/Models/User/Drop.php

@@ -44,7 +44,7 @@ public static function boot()
             }
 
 
-            $rate = Cache::get('drops_rate', 100);
+            $rate =  config('drops.rate') ;
             $drops->total = $drops->amount * $rate;
 
             $this->cache_key = 'user_' . $drops->user_id;

bootstrap/app.php

@@ -70,6 +70,7 @@
 $app->configure('queue');
 $app->configure('session');
 $app->configure('alipay');
+$app->configure('drops');
 
 /*
 |--------------------------------------------------------------------------

config/drops.php

@@ -0,0 +1,6 @@
+<?php
+
+return [
+    'rate' => 1000,
+    'decimal' => 5,
+];