Add numeric age attribute for user model

app/User.php

@@ -232,6 +232,30 @@ class User extends Authenticatable
         return $this->hasMany(Couple::class, 'manager_id');
     }
 
+    public function getAgeAttribute()
+    {
+        $ageDetail = null;
+        $yearOnlySuffix = Carbon::now()->format('-m-d');
+
+        if ($this->dob && !$this->dod) {
+            $ageDetail = Carbon::parse($this->dob)->diffInYears();
+        }
+        if (!$this->dob && $this->yob) {
+            $ageDetail = Carbon::parse($this->yob.$yearOnlySuffix)->diffInYears();
+        }
+        if ($this->dob && $this->dod) {
+            $ageDetail = Carbon::parse($this->dob)->diffInYears($this->dod);
+        }
+        if (!$this->dob && $this->yob && !$this->dod && $this->yod) {
+            $ageDetail = Carbon::parse($this->yob.$yearOnlySuffix)->diffInYears($this->yod.$yearOnlySuffix);
+        }
+        if ($this->dob && $this->yob && $this->dod && $this->yod) {
+            $ageDetail = Carbon::parse($this->dob)->diffInYears($this->dod);
+        }
+
+        return $ageDetail;
+    }
+
     public function getAgeDetailAttribute()
     {
         $ageDetail = null;

tests/Unit/UserTest.php

@@ -149,6 +149,39 @@ class UserTest extends TestCase
 
     /**
      * @test
+     * @dataProvider userAgeDataProvider
+     */
+    public function user_has_age_attribute($today, $dob, $yob, $dod, $yod, $age)
+    {
+        Carbon::setTestNow($today);
+        $user = factory(User::class)->make([
+            'dob' => $dob, 'yob' => $yob, 'dod' => $dod, 'yod' => $yod,
+        ]);
+
+        $this->assertEquals($age, $user->age);
+
+        Carbon::setTestNow();
+    }
+
+    /**
+     * Provide data for calculating user age.
+     * Returning array of today, dob, yob, dod, yod, and age.
+     *
+     * @return array
+     */
+    public function userAgeDataProvider()
+    {
+        return [
+            ['2018-02-02', '1997-01-01', '1997', null, null, 21],
+            ['2018-02-02', '1997-01-01', null, null, null, 21],
+            ['2018-02-02', null, '1997', null, null, 21],
+            ['2018-02-02', '1997-01-01', '1997', '2017-01-01', '2017', 20],
+            ['2018-02-02', null, '1997', null, '2017', 20],
+        ];
+    }
+
+    /**
+     * @test
      * @dataProvider userAgeDetailDataProvider
      */
     public function user_has_age_detail_attribute($today, $dob, $yob, $dod, $yod, $age)