Covered the JSON controller.

app/Repositories/Journal/JournalRepository.php

@@ -62,6 +62,26 @@ class JournalRepository implements JournalRepositoryInterface
         return $journal->transactions()->first()->account_id;
     }
 
+    /**
+     * @param TransactionType $dbType
+     *
+     * @return Collection
+     */
+    public function getJournalsOfType(TransactionType $dbType)
+    {
+        return Auth::user()->transactionjournals()->where('transaction_type_id', $dbType->id)->orderBy('id', 'DESC')->take(50)->get();
+    }
+
+    /**
+     * @param $type
+     *
+     * @return TransactionType
+     */
+    public function getTransactionType($type)
+    {
+        return TransactionType::whereType($type)->first();
+    }
+
     /**
      * @param string             $query
      * @param TransactionJournal $journal
@@ -289,5 +309,4 @@ class JournalRepository implements JournalRepositoryInterface
 
         return [$from, $to];
     }
-
 }

app/Repositories/Journal/JournalRepositoryInterface.php

@@ -4,6 +4,7 @@ namespace FireflyIII\Repositories\Journal;
 
 use FireflyIII\Models\Transaction;
 use FireflyIII\Models\TransactionJournal;
+use FireflyIII\Models\TransactionType;
 use Illuminate\Support\Collection;
 
 /**
@@ -13,6 +14,13 @@ use Illuminate\Support\Collection;
  */
 interface JournalRepositoryInterface
 {
+    /**
+     * Get users first transaction journal
+     *
+     * @return TransactionJournal
+     */
+    public function first();
+
     /**
      *
      * Get the account_id, which is the asset account that paid for the transaction.
@@ -23,6 +31,13 @@ interface JournalRepositoryInterface
      */
     public function getAssetAccount(TransactionJournal $journal);
 
+    /**
+     * @param TransactionType $dbType
+     *
+     * @return Collection
+     */
+    public function getJournalsOfType(TransactionType $dbType);
+
     /**
      * @param string             $query
      * @param TransactionJournal $journal
@@ -31,6 +46,13 @@ interface JournalRepositoryInterface
      */
     public function searchRelated($query, TransactionJournal $journal);
 
+
+    /**
+     * @param $type
+     *
+     * @return TransactionType
+     */
+    public function getTransactionType($type);
     /**
      * @param array $data
      *
@@ -45,11 +67,4 @@ interface JournalRepositoryInterface
      * @return mixed
      */
     public function update(TransactionJournal $journal, array $data);
-
-    /**
-     * Get users first transaction journal
-     *
-     * @return TransactionJournal
-     */
-    public function first();
 }