Add charts (based on JFreeChart)

Currently only an expense report is supported, but more will come.
Also moved rest templates into own toplevel package.

financer-web-client/src/main/java/de/financer/chart/AccountGroupExpensesChartGenerator.java

@@ -0,0 +1,40 @@
+package de.financer.chart;
+
+import de.financer.config.FinancerConfig;
+import de.financer.dto.AccountGroupExpense;
+import de.financer.template.GetAccountGroupExpensesTemplate;
+import de.financer.util.ControllerUtils;
+import org.apache.commons.collections4.IterableUtils;
+import org.jfree.chart.ChartFactory;
+import org.jfree.chart.JFreeChart;
+import org.jfree.data.general.DefaultPieDataset;
+import org.jfree.data.general.PieDataset;
+import org.springframework.context.MessageSource;
+import org.springframework.context.i18n.LocaleContextHolder;
+
+import java.time.LocalDate;
+
+public class AccountGroupExpensesChartGenerator {
+    public JFreeChart generateChart(FinancerConfig financerConfig, LocalDate periodStart, LocalDate periodEnd, MessageSource messageSource) {
+        final String start = ControllerUtils.formatDate(financerConfig, periodStart);
+        final String end = ControllerUtils.formatDate(financerConfig, periodEnd);
+
+        final Iterable<AccountGroupExpense> expenses = new GetAccountGroupExpensesTemplate()
+                .exchange(financerConfig, start, end).getBody();
+
+        final PieDataset dataSet = createDataSet(expenses);
+
+        return ChartFactory.createPieChart(messageSource
+                .getMessage("financer.chart.account-group-expenses-current-period.title", null, LocaleContextHolder
+                        .getLocale()), dataSet);
+    }
+
+    private PieDataset createDataSet(Iterable<AccountGroupExpense> data) {
+        final DefaultPieDataset dataSet = new DefaultPieDataset();
+
+        IterableUtils.toList(data).stream()
+                     .forEach((ex) -> dataSet.setValue(ex.getAccountGroup().getName(), ex.getExpense()));
+
+        return dataSet;
+    }
+}

financer-web-client/src/main/java/de/financer/controller/AccountController.java

@@ -2,7 +2,7 @@ package de.financer.controller;
 
 import de.financer.ResponseReason;
 import de.financer.config.FinancerConfig;
-import de.financer.controller.template.*;
+import de.financer.template.*;
 import de.financer.form.NewAccountForm;
 import de.financer.model.*;
 import de.financer.util.ControllerUtils;
@@ -19,7 +19,6 @@ import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.util.UriComponentsBuilder;
 
-import java.time.LocalDate;
 import java.util.List;
 
 @Controller

financer-web-client/src/main/java/de/financer/controller/AccountGroupController.java

@@ -2,7 +2,7 @@ package de.financer.controller;
 
 import de.financer.ResponseReason;
 import de.financer.config.FinancerConfig;
-import de.financer.controller.template.StringTemplate;
+import de.financer.template.StringTemplate;
 import de.financer.form.NewAccountGroupForm;
 import de.financer.util.ControllerUtils;
 import org.springframework.beans.factory.annotation.Autowired;

financer-web-client/src/main/java/de/financer/controller/ChartController.java

@@ -0,0 +1,40 @@
+package de.financer.controller;
+
+import de.financer.chart.AccountGroupExpensesChartGenerator;
+import de.financer.config.FinancerConfig;
+import de.financer.util.ExpensePeriod;
+import org.jfree.chart.ChartUtils;
+import org.jfree.chart.JFreeChart;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.MessageSource;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@Controller
+public class ChartController {
+    @Autowired
+    private FinancerConfig financerConfig;
+
+    @Autowired
+    private MessageSource messageSource;
+
+    @GetMapping("/getAccountGroupExpensesCurrentPeriod")
+    public void getAccountGroupExpensesCurrentPeriod(HttpServletResponse response) {
+        final ExpensePeriod period = ExpensePeriod
+                .getCurrentExpensePeriod(this.financerConfig.getMonthPeriodStartDay());
+
+        JFreeChart chart = new AccountGroupExpensesChartGenerator()
+                .generateChart(this.financerConfig, period.getStart(), period.getEnd(), this.messageSource);
+
+        response.setContentType("image/png");
+
+        try {
+            ChartUtils.writeChartAsPNG(response.getOutputStream(), chart, 1024, 768);
+        } catch (IOException ioe) {
+            // TODO
+        }
+    }
+}

financer-web-client/src/main/java/de/financer/controller/Function.java

@@ -10,6 +10,7 @@ public enum Function {
 
     ACC_GP_CREATE_ACCOUNT_GROUP("accountGroups/createAccountGroup"),
     ACC_GP_GET_ALL("accountGroups/getAll"),
+    ACC_GP_GET_ACC_GP_EXPENSES("accountGroups/getAccountGroupExpenses"),
 
     TR_GET_ALL("transactions/getAll"),
     TR_GET_ALL_FOR_ACCOUNT("transactions/getAllForAccount"),

financer-web-client/src/main/java/de/financer/controller/RecurringTransactionController.java

@@ -2,7 +2,7 @@ package de.financer.controller;
 
 import de.financer.ResponseReason;
 import de.financer.config.FinancerConfig;
-import de.financer.controller.template.*;
+import de.financer.template.*;
 import de.financer.form.NewRecurringTransactionForm;
 import de.financer.form.RecurringToTransactionWithAmountForm;
 import de.financer.model.Account;

financer-web-client/src/main/java/de/financer/controller/TransactionController.java

@@ -2,10 +2,10 @@ package de.financer.controller;
 
 import de.financer.ResponseReason;
 import de.financer.config.FinancerConfig;
-import de.financer.controller.template.GetAccountByKeyTemplate;
-import de.financer.controller.template.GetAllAccountsTemplate;
-import de.financer.controller.template.GetAllTransactionsForAccountTemplate;
-import de.financer.controller.template.StringTemplate;
+import de.financer.template.GetAccountByKeyTemplate;
+import de.financer.template.GetAllAccountsTemplate;
+import de.financer.template.GetAllTransactionsForAccountTemplate;
+import de.financer.template.StringTemplate;
 import de.financer.form.NewTransactionForm;
 import de.financer.model.Account;
 import de.financer.model.AccountStatus;

financer-web-client/src/main/java/de/financer/template/FinancerRestTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;

financer-web-client/src/main/java/de/financer/template/GetAccountByKeyTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;

financer-web-client/src/main/java/de/financer/template/GetAccountGroupExpensesTemplate.java

@@ -0,0 +1,24 @@
+package de.financer.template;
+
+import de.financer.config.FinancerConfig;
+import de.financer.controller.Function;
+import de.financer.dto.AccountGroupExpense;
+import de.financer.model.Account;
+import de.financer.model.Transaction;
+import de.financer.util.ControllerUtils;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.util.UriComponentsBuilder;
+
+public class GetAccountGroupExpensesTemplate {
+    public ResponseEntity<Iterable<AccountGroupExpense>> exchange(FinancerConfig financerConfig, String start, String end) {
+        final UriComponentsBuilder expensesBuilder = UriComponentsBuilder
+                .fromHttpUrl(ControllerUtils.buildUrl(financerConfig, Function.ACC_GP_GET_ACC_GP_EXPENSES))
+                .queryParam("periodStart", start)
+                .queryParam("periodEnd", end);
+
+        return new FinancerRestTemplate<Iterable<AccountGroupExpense>>()
+                .exchange(expensesBuilder.toUriString(), new ParameterizedTypeReference<Iterable<AccountGroupExpense>>() {
+                });
+    }
+}

financer-web-client/src/main/java/de/financer/template/GetAllAccountGroupsTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;

financer-web-client/src/main/java/de/financer/template/GetAllAccountsTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;

financer-web-client/src/main/java/de/financer/template/GetAllActiveRecurringTransactionsTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;

financer-web-client/src/main/java/de/financer/template/GetAllRecurringTransactionsDueTodayTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;

financer-web-client/src/main/java/de/financer/template/GetAllRecurringTransactionsTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;

financer-web-client/src/main/java/de/financer/template/GetAllTransactionsForAccountTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;

financer-web-client/src/main/java/de/financer/template/GetCurrentAssetsTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;

financer-web-client/src/main/java/de/financer/template/GetExpensesCurrentPeriodTemplate.java

@@ -1,8 +1,7 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import de.financer.config.FinancerConfig;
 import de.financer.controller.Function;
-import de.financer.model.Transaction;
 import de.financer.util.ControllerUtils;
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.ResponseEntity;

financer-web-client/src/main/java/de/financer/template/StringTemplate.java

@@ -1,4 +1,4 @@
-package de.financer.controller.template;
+package de.financer.template;
 
 import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.ResponseEntity;

financer-web-client/src/main/resources/i18n/message.properties

@@ -136,6 +136,8 @@ financer.heading.recurring-to-transaction-with-amount=financer\: create transact
 
 financer.cancel-back-to-overview=Cancel and back to overview
 
+financer.chart.account-group-expenses-current-period.title=Expenses of the current period grouped by account group
+
 financer.error-message.UNKNOWN_ERROR=An unknown error occurred!
 financer.error-message.INVALID_ACCOUNT_TYPE=The selected account type is not valid!
 financer.error-message.FROM_ACCOUNT_NOT_FOUND=The specified from account has not been found!

financer-web-client/src/main/resources/i18n/message_de_DE.properties

@@ -134,4 +134,6 @@ financer.heading.recurring-transaction-list.active=financer\: aktive wiederkehre
 financer.heading.recurring-transaction-list.all=financer\: alle wiederkehrende Buchungen
 financer.heading.recurring-to-transaction-with-amount=financer\: Buchung mit Betrag aus wiederkehrender Buchung erstellen
 
-financer.cancel-back-to-overview=Abbrechen und zur \u00DCbersicht
+financer.cancel-back-to-overview=Abbrechen und zur \u00DCbersicht
+
+financer.chart.account-group-expenses-current-period.title=Ausgaben in der aktuellen Periode gruppiert nach Konto-Gruppe

financer-web-client/src/main/resources/templates/account/accountOverview.html

@@ -16,7 +16,9 @@
     </div>
     <div th:title="#{'financer.account-overview.tooltip.status.current-expenses'(${#temporals.format(periodStart)}, ${#temporals.format(periodEnd)})}">
         <span th:text="#{financer.account-overview.status.current-expenses}"/>
-        <span th:text="${#numbers.formatDecimal(currentExpenses/100D, 1, 'DEFAULT', 2, 'DEFAULT') + currencySymbol}"/>
+        <a th:href="@{/getAccountGroupExpensesCurrentPeriod}">
+            <span th:text="${#numbers.formatDecimal(currentExpenses/100D, 1, 'DEFAULT', 2, 'DEFAULT') + currencySymbol}" />
+        </a>
     </div>
     <div>
         <span th:text="#{financer.account-overview.status.recurring-transaction-due-today}"/>