feat: add's Tyran Lesson 25 SQL and Library Repo

lesson_25/db/db_app/src/main/java/com/codedifferently/lesson25/models/LibraryDataModel.java

@@ -17,6 +17,7 @@ public class LibraryDataModel {
 
   public List<MediaItemModel> mediaItems;
   public List<LibraryGuestModel> guests;
+  public List<LibraryUserModel> users;
 
   public List<MediaItem> getMediaItems() {
     List<MediaItem> results = new ArrayList<>();
@@ -59,4 +60,12 @@ public Map<String, List<CheckoutModel>> getCheckoutsByEmail() {
     }
     return results;
   }
+
+  public List<LibraryUserModel> getUsers() {
+    if (this.users == null) {
+      return new ArrayList<>();
+    } else {
+      return this.users;
+    }
+  }
 }

lesson_25/db/db_app/src/main/java/com/codedifferently/lesson25/models/LibraryUserModel.java

@@ -0,0 +1,26 @@
+package com.codedifferently.lesson25.models;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import java.util.UUID;
+
+@Entity
+@Table(name = "library_users")
+public class LibraryUserModel {
+
+  @Id public UUID id;
+
+  @Column(unique = true, nullable = false)
+  public String email;
+
+  @Column(name = "first_name", nullable = false)
+  public String firstName;
+
+  @Column(name = "last_name", nullable = false)
+  public String lastName;
+
+  @Column(nullable = false)
+  public String password;
+}

lesson_25/db/db_app/src/main/java/com/codedifferently/lesson25/repository/LibraryUserRepository.java

@@ -0,0 +1,14 @@
+package com.codedifferently.lesson25.repository;
+
+import com.codedifferently.lesson25.models.LibraryUserModel;
+import java.util.List;
+import java.util.UUID;
+import org.springframework.data.repository.CrudRepository;
+
+public interface LibraryUserRepository extends CrudRepository<LibraryUserModel, UUID> {
+
+  @Override
+  List<LibraryUserModel> findAll();
+
+  LibraryUserModel findByEmail(String email);
+}

lesson_25/db/db_app/src/main/resources/queries/tyranricejr.sql

@@ -0,0 +1,19 @@
+-- SQL queries by tyranricejr for Lesson 25 assignment
+
+-- Query 1: Count of media items by type
+SELECT type, COUNT(*) as count 
+FROM media_items 
+GROUP BY type
+ORDER BY type;
+
+-- Query 2: Sum of total pages checked out by guests
+SELECT SUM(mi.pages) as total_pages_checked_out
+FROM checked_out_items coi
+JOIN media_items mi ON coi.item_id = mi.id
+WHERE mi.pages IS NOT NULL;
+
+-- Query 3: All 5 guests and any corresponding records in the checked_out_items table
+SELECT g.type, g.name, g.email, coi.item_id, coi.due_date
+FROM guests g
+LEFT JOIN checked_out_items coi ON g.email = coi.email
+ORDER BY g.name, coi.due_date;