discard elapsed timeフラグの立ったチェックインの表示対応

app/Ejaculation.php

@@ -105,4 +105,33 @@ class Ejaculation extends Model
             'is_too_sensitive' => $this->is_too_sensitive,
         ]);
     }
+
+    public function ejaculatedSpan(): string
+    {
+        if (array_key_exists('ejaculated_span', $this->attributes)) {
+            if ($this->ejaculated_span === null) {
+                return '精通';
+            }
+            if ($this->discard_elapsed_time) {
+                return '0日 0時間 0分'; // TODO: 気の効いたフレーズにする
+            }
+
+            return $this->ejaculated_span;
+        } else {
+            $previous = Ejaculation::select('ejaculated_date')
+                ->where('user_id', $this->user_id)
+                ->where('ejaculated_date', '<', $this->ejaculated_date)
+                ->orderByDesc('ejaculated_date')
+                ->first();
+
+            if ($previous === null) {
+                return '精通';
+            }
+            if ($this->discard_elapsed_time) {
+                return '0日 0時間 0分';
+            }
+
+            return $this->ejaculated_date->diff($previous->ejaculated_date)->format('%a日 %h時間 %i分');
+        }
+    }
 }