feat: respect disposition status for staffing status

src/Entity/Assignment.php

@@ -421,6 +421,13 @@ class Assignment implements BlameableEntityInterface, TimestampableEntityInterfa
         return $this;
     }
 
+    public function getConfirmedDispositions(): Collection
+    {
+        return $this->dispositions->filter(function (Disposition $disposition) {
+            return Disposition::STATUS_CONFIRMED === $disposition->getStatus();
+        });
+    }
+
     public function getContact(): ?User
     {
         return $this->contact;
@@ -483,7 +490,9 @@ class Assignment implements BlameableEntityInterface, TimestampableEntityInterfa
 
     public function isStaffed(): bool
     {
-        return $this->availableDispositions === $this->dispositions->count();
+        $confirmedDispositions = $this->getConfirmedDispositions();
+
+        return $this->availableDispositions === $confirmedDispositions->count();
     }
 
     public function isUnstaffed(): bool
@@ -493,8 +502,10 @@ class Assignment implements BlameableEntityInterface, TimestampableEntityInterfa
 
     public function isPartlyStaffed(): bool
     {
-        return $this->availableDispositions > $this->dispositions->count()
+        $confirmedDispositions = $this->getConfirmedDispositions();
-            && 0 < $this->dispositions->count();
+
+        return $this->availableDispositions > $confirmedDispositions->count()
+            && 0 < $confirmedDispositions->count();
     }
 
     public function isStaffing(): bool