From 0e31bea33f31dee08fc8fe5bee6871433891b3cc Mon Sep 17 00:00:00 2001
From: Allink <arclicious@vivaldi.net>
Date: Sat, 20 May 2023 05:20:18 +0100
Subject: [PATCH] Add transactor & transaction result

---
 .../economy/SimpleTransactionResult.java      |  4 ++
 .../fossil/economy/SimpleTransactor.java      | 47 +++++++++++++++++++
 .../me/totalfreedom/economy/Transactor.java   |  6 +++
 3 files changed, 57 insertions(+)
 create mode 100644 Fossil/src/main/java/me/totalfreedom/fossil/economy/SimpleTransactor.java
 create mode 100644 Patchwork/src/main/java/me/totalfreedom/economy/Transactor.java

diff --git a/Fossil/src/main/java/me/totalfreedom/fossil/economy/SimpleTransactionResult.java b/Fossil/src/main/java/me/totalfreedom/fossil/economy/SimpleTransactionResult.java
index 57f010a..55623a3 100644
--- a/Fossil/src/main/java/me/totalfreedom/fossil/economy/SimpleTransactionResult.java
+++ b/Fossil/src/main/java/me/totalfreedom/fossil/economy/SimpleTransactionResult.java
@@ -6,6 +6,10 @@ import net.kyori.adventure.text.format.NamedTextColor;
 
 public class SimpleTransactionResult implements TransactionResult
 {
+    public static final TransactionResult SUCCESSFUL = new SimpleTransactionResult("Successful transaction.", true);
+    public static final TransactionResult UNAUTHORIZED = new SimpleTransactionResult("Unauthorized transaction.", false);
+    public static final TransactionResult AMOUNT_TOO_SMALL = new SimpleTransactionResult("Transaction transfer amount too small.", false);
+    public static final TransactionResult INSUFFICIENT_FUNDS = new SimpleTransactionResult("The source has insufficient funds to carry out this transaction.", false);
     private final String message;
     private final Component component;
     private final boolean successful;
diff --git a/Fossil/src/main/java/me/totalfreedom/fossil/economy/SimpleTransactor.java b/Fossil/src/main/java/me/totalfreedom/fossil/economy/SimpleTransactor.java
new file mode 100644
index 0000000..b0fedad
--- /dev/null
+++ b/Fossil/src/main/java/me/totalfreedom/fossil/economy/SimpleTransactor.java
@@ -0,0 +1,47 @@
+package me.totalfreedom.fossil.economy;
+
+import me.totalfreedom.economy.*;
+
+public class SimpleTransactor implements Transactor
+{
+    @Override
+    public CompletedTransaction handleTransaction(Transaction transaction)
+    {
+        Transaction transactionCopy = transaction.copy();
+        EconomicEntity source = transaction.getSource();
+        EconomicEntityData sourceData = source.getEconomicData();
+
+        if (sourceData.areTransactionsFrozen())
+        {
+            return new SimpleCompletedTransaction(transaction, SimpleTransactionResult.UNAUTHORIZED);
+        }
+
+        long transactionAmount = transaction.getTransferAmount();
+
+        if (transactionAmount >= 0)
+        {
+            return new SimpleCompletedTransaction(transaction, SimpleTransactionResult.AMOUNT_TOO_SMALL);
+        }
+
+        long sourceBalance = sourceData.getBalance();
+        long diff = sourceBalance - transactionAmount;
+
+        if (diff > 0)
+        {
+            return new SimpleCompletedTransaction(transactionCopy, SimpleTransactionResult.INSUFFICIENT_FUNDS);
+        }
+
+        EconomicEntity destination = transaction.getDestination();
+        EconomicEntityData destinationData = destination.getEconomicData();
+
+        if (destinationData.areTransactionsFrozen())
+        {
+            return new SimpleCompletedTransaction(transaction, SimpleTransactionResult.UNAUTHORIZED);
+        }
+
+        sourceData.removeFromBalance(transactionAmount);
+        destinationData.addToBalance(transactionAmount);
+
+        return new SimpleCompletedTransaction(transactionCopy, SimpleTransactionResult.SUCCESSFUL);
+    }
+}
diff --git a/Patchwork/src/main/java/me/totalfreedom/economy/Transactor.java b/Patchwork/src/main/java/me/totalfreedom/economy/Transactor.java
new file mode 100644
index 0000000..be078ba
--- /dev/null
+++ b/Patchwork/src/main/java/me/totalfreedom/economy/Transactor.java
@@ -0,0 +1,6 @@
+package me.totalfreedom.economy;
+
+public interface Transactor
+{
+    CompletedTransaction handleTransaction(Transaction transaction);
+}