Added sample profile generator.

src/main/java/com/andrewlalis/perfin/control/ProfilesViewController.java

@@ -2,6 +2,7 @@ package com.andrewlalis.perfin.control;
 
 import com.andrewlalis.perfin.PerfinApp;
 import com.andrewlalis.perfin.data.ProfileLoadException;
+import com.andrewlalis.perfin.data.SampleProfileGenerator;
 import com.andrewlalis.perfin.data.util.FileUtil;
 import com.andrewlalis.perfin.model.Profile;
 import com.andrewlalis.perfin.model.ProfileBackups;
@@ -58,6 +59,16 @@ public class ProfilesViewController {
         }
     }
 
+    @FXML public void createSampleProfile() {
+        SampleProfileGenerator generator = new SampleProfileGenerator(PerfinApp.profileLoader);
+        try {
+            generator.createSampleProfile();
+            refreshAvailableProfiles();
+        } catch (Exception e) {
+            Popups.error(profilesVBox, e);
+        }
+    }
+
     private void refreshAvailableProfiles() {
         List<String> profileNames = ProfileLoader.getAvailableProfiles();
         String currentProfile = Profile.getCurrent() == null ? null : Profile.getCurrent().name();

src/main/java/com/andrewlalis/perfin/data/SampleProfileGenerator.java

@@ -0,0 +1,186 @@
+package com.andrewlalis.perfin.data;
+
+import com.andrewlalis.perfin.data.pagination.PageRequest;
+import com.andrewlalis.perfin.data.util.DateUtil;
+import com.andrewlalis.perfin.model.*;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.nio.file.Files;
+import java.sql.SQLException;
+import java.time.LocalDateTime;
+import java.util.*;
+
+public class SampleProfileGenerator {
+    private final ProfileLoader profileLoader;
+
+    private final Random random;
+
+    public SampleProfileGenerator(ProfileLoader profileLoader) {
+        this.profileLoader = profileLoader;
+        this.random = new Random();
+    }
+
+    public Profile createSampleProfile() throws ProfileLoadException, SQLException, IOException {
+        String name = getNewSampleProfileName();
+        Profile profile = profileLoader.load(name);
+        generateRandomAccounts(profile);
+        generateBrokerageAccountAssetRecords(profile);
+        generateRandomTransactions(profile);
+        return profile;
+    }
+
+    private String getNewSampleProfileName() {
+        int i = 1;
+        while (true) {
+            String name = "sample-" + i;
+            if (Files.notExists(Profile.getDir(name))) {
+                return name;
+            }
+            i++;
+        }
+    }
+
+    private void generateRandomAccounts(Profile profile) {
+        final int accountsToCreate = random.nextInt(5, 11);
+        AccountRepository accountRepo = profile.dataSource().getAccountRepository();
+        BalanceRecordRepository balanceRecordRepo = profile.dataSource().getBalanceRecordRepository();
+        for (int i = 0; i < accountsToCreate; i++) {
+            long id = accountRepo.insert(
+                    randomChoice(AccountType.values()),
+                    randomAccountNumber(),
+                    "Sample Account " + i,
+                    randomChoice(Currency.getInstance("USD"), Currency.getInstance("EUR")),
+                    "Description for sample account " + i + "."
+            );
+            Account account = accountRepo.findById(id).orElseThrow();
+            BigDecimal initialBalance = randomMoneyValue(account.getCurrency(), 0, 5000, true);
+            if (account.getType() == AccountType.CREDIT_CARD) {
+                BigDecimal creditLimit = randomMoneyValue(account.getCurrency(), 200, 10000, false);
+                accountRepo.saveCreditCardProperties(new CreditCardProperties(id, creditLimit));
+            }
+            balanceRecordRepo.insert(DateUtil.nowAsUTC(), account.id, BalanceRecordType.CASH, initialBalance, account.getCurrency(), Collections.emptyList());
+        }
+    }
+
+    private void generateBrokerageAccountAssetRecords(Profile profile) {
+        AccountRepository accountRepo = profile.dataSource().getAccountRepository();
+        BalanceRecordRepository balanceRecordRepo = profile.dataSource().getBalanceRecordRepository();
+        List<Account> accounts = accountRepo.findAll(PageRequest.unpaged()).items();
+        for (var account : accounts) {
+            if (account.getType() == AccountType.BROKERAGE) {
+                LocalDateTime cutoff = account.getCreatedAt().minusYears(5);
+                LocalDateTime currentTimestamp = account.getCreatedAt().minusDays(random.nextInt(1, 30));
+                BigDecimal assetValue = randomMoneyValue(account.getCurrency(), 1000, 1_000_000, true);
+                while (currentTimestamp.isAfter(cutoff)) {
+                    balanceRecordRepo.insert(
+                            currentTimestamp,
+                            account.id,
+                            BalanceRecordType.ASSETS,
+                            assetValue,
+                            account.getCurrency(),
+                            Collections.emptyList()
+                    );
+                    double valueAdjustment = random.nextGaussian() * assetValue.doubleValue() / 100.0 - 0.2;
+                    assetValue = assetValue.subtract(BigDecimal.valueOf(valueAdjustment)).setScale(4, RoundingMode.HALF_UP);
+                    currentTimestamp = currentTimestamp.minusDays(random.nextInt(7, 60));
+                }
+            }
+        }
+    }
+
+    private void generateRandomTransactions(Profile profile) {
+        AccountRepository accountRepo = profile.dataSource().getAccountRepository();
+        TransactionRepository transactionRepo = profile.dataSource().getTransactionRepository();
+        TransactionVendorRepository vendorRepo = profile.dataSource().getTransactionVendorRepository();
+        TransactionCategoryRepository categoryRepo = profile.dataSource().getTransactionCategoryRepository();
+        final int vendorCount = 50;
+        for (int i = 0; i < vendorCount; i++) {
+            vendorRepo.insert("Vendor " + i);
+        }
+        List<String> vendors = vendorRepo.findAll().stream().map(TransactionVendor::getName).toList();
+        final int tagCount = 10;
+        List<String> tags = new ArrayList<>(tagCount);
+        for (int i = 0; i < tagCount; i++) {
+            tags.add("tag-" + i);
+        }
+        List<String> categories = categoryRepo.findAll().stream().map(TransactionCategory::getName).toList();
+
+        for (var account : accountRepo.findAll(PageRequest.unpaged()).items()) {
+            LocalDateTime cutoff = account.getCreatedAt().minusMonths(3);
+            LocalDateTime timestamp = account.getCreatedAt().minusSeconds(random.nextInt(60, 60*60*24));
+            while (timestamp.isAfter(cutoff)) {
+                String vendor = null;
+                if (randomChance(0.75)) {
+                    vendor = randomChoice(vendors);
+                }
+                String category = null;
+                if (randomChance(0.8)) {
+                    category = randomChoice(categories);
+                }
+                Set<String> tagsToUse = new HashSet<>();
+                if (randomChance(0.75)) {
+                    for (int i = 0; i < random.nextInt(3); i++) {
+                        tagsToUse.add(randomChoice(tags));
+                    }
+                }
+                BigDecimal transactionAmount = randomMoneyValue(account.getCurrency(), 1, 500, true);
+                CreditAndDebitAccounts accounts = new CreditAndDebitAccounts(account, null);
+                if (randomChance(0.1)) {
+                    accounts = new CreditAndDebitAccounts(null, account);
+                    transactionAmount = randomMoneyValue(account.getCurrency(), 500, 2000, true);
+                }
+
+                transactionRepo.insert(
+                        timestamp,
+                        transactionAmount,
+                        account.getCurrency(),
+                        "Sample transaction description.",
+                        accounts,
+                        vendor,
+                        category,
+                        tagsToUse,
+                        Collections.emptyList(),
+                        Collections.emptyList()
+                );
+
+                timestamp = timestamp.minusSeconds(random.nextInt(60, 60*60*24 * 30));
+            }
+        }
+    }
+
+    private BigDecimal randomMoneyValue(Currency currency, int min, int max, boolean includeDecimals) {
+        int wholeValue = random.nextInt(min, max + 1);
+        BigDecimal value = BigDecimal.valueOf(wholeValue * 10000L, 4);
+        if (includeDecimals && currency.getDefaultFractionDigits() > 0) {
+            int orderOfMagnitude = (int) Math.pow(10, currency.getDefaultFractionDigits());
+            int decimalValue = random.nextInt( orderOfMagnitude + 1);
+            BigDecimal fractionalValue = BigDecimal.valueOf(decimalValue, currency.getDefaultFractionDigits());
+            value = value.add(fractionalValue);
+        }
+        return value.setScale(4, RoundingMode.HALF_UP);
+    }
+
+    private String randomAccountNumber() {
+        String alphabet = "0123456789";
+        StringBuilder sb = new StringBuilder(16);
+        for (int i = 0; i < 16; i++) {
+            sb.append(alphabet.charAt(random.nextInt(alphabet.length())));
+        }
+        return sb.toString();
+    }
+
+    @SafeVarargs
+    private <T> T randomChoice(T... items) {
+        return items[random.nextInt(items.length)];
+    }
+
+    private <T> T randomChoice(List<T> items) {
+        return items.get(random.nextInt(items.size()));
+    }
+
+    private boolean randomChance(double percentChance) {
+        return random.nextDouble() <= percentChance;
+    }
+}

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

@@ -52,6 +52,7 @@ public class ProfileBackups {
     }
 
     public static LocalDateTime getLastBackupTimestamp(String name) {
+        if (Files.notExists(getBackupDir(name))) return null;
         try (var files = Files.list(getBackupDir(name))) {
             return files.map(ProfileBackups::getTimestampFromBackup)
                     .max(LocalDateTime::compareTo)

src/main/resources/profiles-view.fxml

@@ -37,6 +37,7 @@
         </ScrollPane>
     </center>
     <bottom>
+        <VBox>
             <BorderPane>
                 <left>
                     <AnchorPane styleClass="std-padding">
@@ -54,5 +55,9 @@
                     </VBox>
                 </right>
             </BorderPane>
+            <HBox styleClass="std-spacing,std-padding">
+                <Button text="Create Sample Profile" styleClass="small-font" onAction="#createSampleProfile"/>
+            </HBox>
+        </VBox>
     </bottom>
 </BorderPane>