17.using persistence in a controller

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id 'org.springframework.boot' version '2.2.1.RELEASE'
+	id 'org.springframework.boot' version '2.4.4'
 	id 'io.spring.dependency-management' version '1.0.8.RELEASE'
 	id 'java'
 }
@@ -22,6 +22,9 @@ repositories {
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'mysql:mysql-connector-java'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
 	developmentOnly 'org.springframework.boot:spring-boot-devtools'
 	testImplementation('org.springframework.boot:spring-boot-starter-test') {
 		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.0-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

src/main/java/org/launchcode/codingevents/controllers/EventController.java

@@ -1,14 +1,14 @@
 package org.launchcode.codingevents.controllers;
 
+import org.launchcode.codingevents.data.EventData;
+import org.launchcode.codingevents.models.Event;
+import org.launchcode.codingevents.models.EventType;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.validation.Errors;
+import org.springframework.web.bind.annotation.*;
 
-import java.util.ArrayList;
-import java.util.List;
+import javax.validation.Valid;
 
 /**
  * Created by Chris Bay
@@ -17,24 +17,49 @@
 @RequestMapping("events")
 public class EventController {
 
-    private static List<String> events = new ArrayList<>();
-
     @GetMapping
     public String displayAllEvents(Model model) {
         model.addAttribute("title", "All Events");
-        model.addAttribute("events", events);
+        model.addAttribute("events", EventData.getAll());
         return "events/index";
     }
 
     @GetMapping("create")
     public String displayCreateEventForm(Model model) {
         model.addAttribute("title", "Create Event");
+        model.addAttribute(new Event());
+        model.addAttribute("types", EventType.values());
         return "events/create";
     }
 
     @PostMapping("create")
-    public String processCreateEventForm(@RequestParam String eventName) {
-        events.add(eventName);
+    public String processCreateEventForm(@ModelAttribute @Valid Event newEvent,
+                                         Errors errors, Model model) {
+        if(errors.hasErrors()) {
+            model.addAttribute("title", "Create Event");
+            return "events/create";
+        }
+
+        EventData.add(newEvent);
+        return "redirect:";
+    }
+
+    @GetMapping("delete")
+    public String displayDeleteEventForm(Model model) {
+        model.addAttribute("title", "Delete Events");
+        model.addAttribute("events", EventData.getAll());
+        return "events/delete";
+    }
+
+    @PostMapping("delete")
+    public String processDeleteEventsForm(@RequestParam(required = false) int[] eventIds) {
+
+        if (eventIds != null) {
+            for (int id : eventIds) {
+                EventData.remove(id);
+            }
+        }
+
         return "redirect:";
     }
 

src/main/java/org/launchcode/codingevents/data/EventData.java

@@ -0,0 +1,32 @@
+package org.launchcode.codingevents.data;
+
+import org.launchcode.codingevents.models.Event;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Created by Chris Bay
+ */
+public class EventData {
+
+    private static final Map<Integer, Event> events = new HashMap<>();
+
+    public static Collection<Event> getAll() {
+        return events.values();
+    }
+
+    public static Event getById(int id) {
+        return events.get(id);
+    }
+
+    public static void add(Event event) {
+        events.put(event.getId(), event);
+    }
+
+    public static void remove(int id) {
+        events.remove(id);
+    }
+
+}

src/main/java/org/launchcode/codingevents/data/EventRepository.java

@@ -0,0 +1,12 @@
+package org.launchcode.codingevents.data;
+
+import org.launchcode.codingevents.models.Event;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+/**
+ * Created by Chris Bay
+ */
+@Repository
+public interface EventRepository extends CrudRepository<Event, Integer> {
+}

src/main/java/org/launchcode/codingevents/models/Event.java

@@ -0,0 +1,96 @@
+package org.launchcode.codingevents.models;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.validation.constraints.Email;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.Size;
+import java.util.Objects;
+
+/**
+ * Created by Chris Bay
+ */
+@Entity
+public class Event {
+
+    @Id
+    @GeneratedValue
+    private int id;
+
+    @NotBlank(message = "Name is required")
+    @Size(min = 3, max = 50, message = "Name must be between 3 and 50 characters")
+    private String name;
+
+    @Size(max = 500, message = "Description too long!")
+    private String description;
+
+    @NotBlank(message = "Email is required")
+    @Email(message = "Invalid email. Try again.")
+    private String contactEmail;
+
+    private EventType type;
+
+    public Event(String name, String description, String contactEmail, EventType type) {
+        this.name = name;
+        this.description = description;
+        this.contactEmail = contactEmail;
+        this.type = type;
+    }
+
+    public Event() {}
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public String getContactEmail() {
+        return contactEmail;
+    }
+
+    public void setContactEmail(String contactEmail) {
+        this.contactEmail = contactEmail;
+    }
+
+    public EventType getType() {
+        return type;
+    }
+
+    public void setType(EventType type) {
+        this.type = type;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    @Override
+    public String toString() {
+        return name;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Event event = (Event) o;
+        return id == event.id;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id);
+    }
+}

src/main/java/org/launchcode/codingevents/models/EventType.java

@@ -0,0 +1,22 @@
+package org.launchcode.codingevents.models;
+
+/**
+ * Created by Chris Bay
+ */
+public enum EventType {
+
+    CONFERENCE("Conference"),
+    MEETUP("Meetup"),
+    WORKSHOP("Workshop"),
+    SOCIAL("Social");
+
+    private final String displayName;
+
+    EventType(String displayName) {
+        this.displayName = displayName;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+}

src/main/resources/application.properties

@@ -1 +1,17 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/coding_events_demo
+spring.datasource.username=coding_events_demo
+spring.datasource.password=Learn2code!
+
+# Specify the DBMS
+spring.jpa.database = MYSQL
+
+# Show or not log for each sql query
+spring.jpa.show-sql = false
+
+# Hibernate ddl auto (create, create-drop, update)
+spring.jpa.hibernate.ddl-auto = update
+
+# Use spring.jpa.properties.* for Hibernate native properties (the prefix is
+# stripped before adding them to the entity manager)
+spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL8Dialect
 

src/main/resources/static/styles.css

@@ -1,3 +1,6 @@
 body {
-  font-size: 18px;
+  font-size: 14px;
+}
+.error {
+  color: red;
 }

src/main/resources/templates/events/create.html

@@ -1,13 +1,42 @@
 <!DOCTYPE html>
 <html lang="en" xmlns:th="http://www.thymeleaf.org/">
 <head th:replace="fragments :: head"></head>
-<body>
+<body class="container">
 
 <header th:replace="fragments :: header"></header>
 
 <form method="post">
-    <input type="text" name="eventName">
-    <input type="submit" value="Create">
+    <div class="form-group">
+        <label>Name
+            <input th:field="${event.name}" class="form-control">
+        </label>
+        <p class="error" th:errors="${event.name}"></p>
+    </div>
+    <div class="form-group">
+        <label>Description
+            <input th:field="${event.description}" class="form-control">
+        </label>
+        <p class="error" th:errors="${event.description}"></p>
+    </div>
+    <div class="form-group">
+        <label>Contact Email
+            <input th:field="${event.contactEmail}" class="form-control">
+        </label>
+        <p class="error" th:errors="${event.contactEmail}"></p>
+    </div>
+    <div class="form-group">
+        <label>Type
+        <select th:field="${event.type}">
+            <option th:each="type : ${types}"
+                    th:value="${type}"
+                    th:text="${type.displayName}"
+            ></option>
+        </select>
+        </label>
+    </div>
+    <div class="form-group">
+        <input type="submit" value="Create" class="btn btn-success">
+    </div>
 </form>
 
 </body>

src/main/resources/templates/events/delete.html

@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org/">
+<head th:replace="fragments :: head"></head>
+<body class="container">
+
+<header th:replace="fragments :: header"></header>
+
+<form method="post">
+
+    <th:block th:each="event : ${events}">
+        <div class="form-group">
+        <label>
+            <span th:text="${event.name}"></span>
+            <input type="checkbox" name="eventIds" th:value="${event.id}" class="form-control">
+        </label>
+        </div>
+    </th:block>
+
+    <input type="submit" value="Delete" class="btn btn-danger">
+</form>
+
+</body>
+</html>

src/main/resources/templates/events/index.html

@@ -1,15 +1,28 @@
 <!DOCTYPE html>
 <html lang="en" xmlns:th="http://www.thymeleaf.org/">
 <head th:replace="fragments :: head"></head>
-<body>
+<body class="container">
 
 <header th:replace="fragments :: header"></header>
 
-<ul>
-    <th:block th:each="event : ${events}">
-        <li th:text="${event}"></li>
-    </th:block>
-</ul>
+<table class="table table-striped">
+    <thead>
+        <tr>
+            <th>ID</th>
+            <th>Name</th>
+            <th>Description</th>
+            <th>Contact Email</th>
+            <th>Type</th>
+        </tr>
+    </thead>
+    <tr th:each="event : ${events}">
+        <td th:text="${event.id}"></td>
+        <td th:text="${event.name}"></td>
+        <td th:text="${event.description}"></td>
+        <td th:text="${event.contactEmail}"></td>
+        <td th:text="${event.type.displayName}"></td>
+    </tr>
+</table>
 
 </body>
 </html>