src/main/java/com/andrewlalis/perfin/data/impl/JdbcDataSourceFactory.java

@@ -32,7 +32,7 @@ public class JdbcDataSourceFactory {
      * the profile has a newer schema version, we'll exit and prompt the user
      * to update their app.
      */
-    public static final int SCHEMA_VERSION = 1;
+    public static final int SCHEMA_VERSION = 2;
 
     public DataSource getDataSource(String profileName) throws ProfileLoadException {
         final boolean dbExists = Files.exists(getDatabaseFile(profileName));

src/main/java/com/andrewlalis/perfin/data/impl/migration/Migrations.java

@@ -4,10 +4,19 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+/**
+ * Utility class for defining and using all known migrations.
+ */
 public class Migrations {
+    /**
+     * Gets a list of migrations, as a map with the key being the version to
+     * migrate from. For example, a migration that takes us from version 42 to
+     * 43 would exist in the map with key 42.
+     * @return The map of all migrations.
+     */
     public static Map<Integer, Migration> getMigrations() {
         final Map<Integer, Migration> migrations = new HashMap<>();
-        migrations.put(1, new PlainSQLMigration("/sql/migration/M1_AddBalanceRecordDeleted.sql"));
+        migrations.put(1, new PlainSQLMigration("/sql/migration/M001_AddTransactionProperties.sql"));
         return migrations;
     }
 

src/main/java/com/andrewlalis/perfin/data/util/FileUtil.java

@@ -1,5 +1,6 @@
 package com.andrewlalis.perfin.data.util;
 
+import com.andrewlalis.perfin.model.Profile;
 import javafx.stage.FileChooser;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -103,4 +104,14 @@ public class FileUtil {
             throw new RuntimeException(e);
         }
     }
+
+    public static void copyResourceFile(String resource, Path dest) throws IOException {
+        try (
+                var in = Profile.class.getResourceAsStream(resource);
+                var out = Files.newOutputStream(dest)
+        ) {
+            if (in == null) throw new IOException("Could not load resource " + resource);
+            in.transferTo(out);
+        }
+    }
 }

src/main/java/com/andrewlalis/perfin/model/Profile.java

@@ -17,6 +17,8 @@ import java.util.List;
 import java.util.Properties;
 import java.util.function.Consumer;
 
+import static com.andrewlalis.perfin.data.util.FileUtil.copyResourceFile;
+
 /**
  * A profile is essentially a complete set of data that the application can
  * operate on, sort of like a save file or user account. The profile contains
@@ -153,16 +155,6 @@ public class Profile {
         copyResourceFile("/text/contentDirReadme.txt", getContentDir(name).resolve("README.txt"));
     }
 
-    private static void copyResourceFile(String resource, Path dest) throws IOException {
-        try (
-                var in = Profile.class.getResourceAsStream(resource);
-                var out = Files.newOutputStream(dest)
-        ) {
-            if (in == null) throw new IOException("Could not load resource " + resource);
-            in.transferTo(out);
-        }
-    }
-
     public static boolean validateName(String name) {
         return name != null &&
                 name.matches("\\w+") &&

src/main/resources/sql/migration/M001_AddTransactionProperties.sql

@@ -0,0 +1,73 @@
+/*
+Migration to add additional properties to transactions as per this GitHub issue:
+https://github.com/andrewlalis/perfin/issues/10
+
+Adds the following:
+- An optional "vendor" field and associated vendor entity.
+- An optional "category" field and associated category entity.
+- An optional set of "tags" that are user-defined strings.
+- An optional set of "line items" that comprise some subtotal of the transaction
+  and can be used to specify that X amount of the total was spent on some
+  specific item.
+- An optional address of the purchase.
+*/
+
+CREATE TABLE transaction_vendor (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    name VARCHAR(255) NOT NULL UNIQUE,
+    description VARCHAR(255)
+);
+
+CREATE TABLE transaction_category (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    parent_id BIGINT DEFAULT NULL,
+    name VARCHAR(63) NOT NULL UNIQUE,
+    color VARCHAR(6) NOT NULL DEFAULT 'FFFFFF',
+    CONSTRAINT fk_transaction_category_parent
+        FOREIGN KEY (parent_id) REFERENCES transaction_category(id)
+            ON UPDATE CASCADE ON DELETE CASCADE
+);
+
+CREATE TABLE transaction_tag (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    name VARCHAR(63) NOT NULL UNIQUE
+);
+
+CREATE TABLE transaction_tag_join (
+    transaction_id BIGINT NOT NULL,
+    tag_id BIGINT NOT NULL,
+    PRIMARY KEY (transaction_id, tag_id),
+    CONSTRAINT fk_transaction_tag_join_transaction
+        FOREIGN KEY (transaction_id) REFERENCES transaction(id)
+            ON UPDATE CASCADE ON DELETE CASCADE,
+    CONSTRAINT fk_transaction_tag_join_tag
+        FOREIGN KEY (tag_id) REFERENCES transaction_tag(id)
+            ON UPDATE CASCADE ON DELETE CASCADE
+);
+
+CREATE TABLE transaction_line_item (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    transaction_id BIGINT NOT NULL,
+    value_per_item NUMERIC(12, 4) NOT NULL,
+    quantity INT NOT NULL DEFAULT 1,
+    description VARCHAR(255) NOT NULL,
+    CONSTRAINT fk_transaction_line_item_transaction
+        FOREIGN KEY (transaction_id) REFERENCES transaction(id)
+            ON UPDATE CASCADE ON DELETE CASCADE,
+    CONSTRAINT ck_transaction_line_item_quantity_positive
+        CHECK quantity > 0
+);
+
+ALTER TABLE transaction
+    ADD COLUMN vendor_id BIGINT DEFAULT NULL AFTER description;
+ALTER TABLE transaction
+    ADD COLUMN category_id BIGINT DEFAULT NULL AFTER vendor_id;
+ALTER TABLE transaction
+    ADD CONSTRAINT fk_transaction_vendor
+        FOREIGN KEY (vendor_id) REFERENCES transaction_vendor(id)
+            ON UPDATE CASCADE ON DELETE SET NULL;
+ALTER TABLE transaction
+    ADD CONSTRAINT fk_transaction_category
+        FOREIGN KEY (category_id) REFERENCES transaction_category(id)
+            ON UPDATE CASCADE ON DELETE SET NULL;
+

src/main/resources/sql/schema.sql

@@ -8,14 +8,6 @@ CREATE TABLE account (
     currency VARCHAR(3) NOT NULL
 );
 
-CREATE TABLE transaction (
-    id BIGINT PRIMARY KEY AUTO_INCREMENT,
-    timestamp TIMESTAMP NOT NULL,
-    amount NUMERIC(12, 4) NOT NULL,
-    currency VARCHAR(3) NOT NULL,
-    description VARCHAR(255) NULL
-);
-
 CREATE TABLE attachment (
     id BIGINT PRIMARY KEY AUTO_INCREMENT,
     uploaded_at TIMESTAMP NOT NULL,
@@ -24,6 +16,45 @@ CREATE TABLE attachment (
     content_type VARCHAR(255) NOT NULL
 );
 
+/* TRANSACTION ENTITIES */
+
+CREATE TABLE transaction_vendor (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    name VARCHAR(255) NOT NULL UNIQUE,
+    description VARCHAR(255)
+);
+
+CREATE TABLE transaction_category (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    parent_id BIGINT DEFAULT NULL,
+    name VARCHAR(63) NOT NULL UNIQUE,
+    color VARCHAR(6) NOT NULL DEFAULT 'FFFFFF',
+    CONSTRAINT fk_transaction_category_parent
+        FOREIGN KEY (parent_id) REFERENCES transaction_category(id)
+            ON UPDATE CASCADE ON DELETE CASCADE
+);
+
+CREATE TABLE transaction_tag (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    name VARCHAR(63) NOT NULL UNIQUE
+);
+
+CREATE TABLE transaction (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    timestamp TIMESTAMP NOT NULL,
+    amount NUMERIC(12, 4) NOT NULL,
+    currency VARCHAR(3) NOT NULL,
+    description VARCHAR(255) NULL,
+    vendor_id BIGINT DEFAULT NULL,
+    category_id BIGINT DEFAULT NULL,
+    CONSTRAINT fk_transaction_vendor
+        FOREIGN KEY (vendor_id) REFERENCES transaction_vendor(id)
+            ON UPDATE CASCADE ON DELETE SET NULL,
+    CONSTRAINT fk_transaction_category
+        FOREIGN KEY (category_id) REFERENCES transaction_category(id)
+            ON UPDATE CASCADE ON DELETE SET NULL
+);
+
 CREATE TABLE account_entry (
     id BIGINT PRIMARY KEY AUTO_INCREMENT,
     timestamp TIMESTAMP NOT NULL,
@@ -52,6 +83,34 @@ CREATE TABLE transaction_attachment (
             ON UPDATE CASCADE ON DELETE CASCADE
 );
 
+CREATE TABLE transaction_tag_join (
+    transaction_id BIGINT NOT NULL,
+    tag_id BIGINT NOT NULL,
+    PRIMARY KEY (transaction_id, tag_id),
+    CONSTRAINT fk_transaction_tag_join_transaction
+        FOREIGN KEY (transaction_id) REFERENCES transaction(id)
+            ON UPDATE CASCADE ON DELETE CASCADE,
+    CONSTRAINT fk_transaction_tag_join_tag
+        FOREIGN KEY (tag_id) REFERENCES transaction_tag(id)
+            ON UPDATE CASCADE ON DELETE CASCADE
+);
+
+CREATE TABLE transaction_line_item (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT,
+    transaction_id BIGINT NOT NULL,
+    value_per_item NUMERIC(12, 4) NOT NULL,
+    quantity INT NOT NULL DEFAULT 1,
+    idx INT NOT NULL DEFAULT 0,
+    description VARCHAR(255) NOT NULL,
+    CONSTRAINT fk_transaction_line_item_transaction
+        FOREIGN KEY (transaction_id) REFERENCES transaction(id)
+            ON UPDATE CASCADE ON DELETE CASCADE,
+    CONSTRAINT ck_transaction_line_item_quantity_positive
+        CHECK quantity > 0
+);
+
+/* BALANCE RECORD ENTITIES */
+
 CREATE TABLE balance_record (
     id BIGINT PRIMARY KEY AUTO_INCREMENT,
     timestamp TIMESTAMP NOT NULL,