Feat: Added Librarian Concept + Media support

lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/library/Librarian.java

@@ -0,0 +1,98 @@
+package com.codedifferently.lesson10.library;
+
+import com.codedifferently.lesson10.library.media.Dvd;
+import java.util.HashSet;
+import java.util.Set;
+
+/** Represents a librarian of a library. */
+public class Librarian extends Patron {
+ private Set<Dvd> dvds = new HashSet<>(); // Added for DVDs
+ private Set<Dvd> checkedOutDvds = new HashSet<>(); // Added for checked out DVDs
+
+ /**
+ * Create a new librarian with the given id.
+ *
+ * @param id The id of the librarian.
+ */
+ public Librarian(String id) {
+ super(id, "Librarian"); // Updated constructor call with role
+ }
+
+ /**
+ * Add a DVD to the librarian's collection.
+ *
+ * @param dvd The DVD to add.
+ */
+ public void addDvd(Dvd dvd) {
+ this.dvds.add(dvd);
+ }
+
+ /**
+ * Remove a DVD from the librarian's collection.
+ *
+ * @param dvd The DVD to remove.
+ */
+ public void removeDvd(Dvd dvd) {
+ this.dvds.remove(dvd);
+ }
+
+ /**
+ * Check out a DVD to a patron.
+ *
+ * @param dvd The DVD to check out.
+ * @param patron The patron to check out the DVD to.
+ * @return True if the DVD was checked out, false otherwise.
+ */
+ public boolean checkOutDvd(Dvd dvd, Patron patron) {
+ if (!canCheckOutDvd(dvd, patron)) {
+ return false;
+ }
+ this.checkedOutDvds.add(dvd);
+ return true;
+ }
+
+ private boolean canCheckOutDvd(Dvd dvd, Patron patron) {
+ if (!this.hasDvd(dvd)) {
+ return false;
+ }
+ if (!this.hasPatron(patron)) {
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Check in a DVD from a patron.
+ *
+ * @param dvd The DVD to check in.
+ * @param patron The patron returning the DVD.
+ * @return True if the DVD was returned, false otherwise.
+ */
+ public boolean checkInDvd(Dvd dvd, Patron patron) {
+ if (!this.checkedOutDvds.contains(dvd)) {
+ return false;
+ }
+ this.checkedOutDvds.remove(dvd);
+ return true;
+ }
+
+ /**
+ * Check if the librarian has the given DVD.
+ *
+ * @param dvd The DVD to check for.
+ * @return True if the librarian has the DVD, false otherwise.
+ */
+ public boolean hasDvd(Dvd dvd) {
+ return this.dvds.contains(dvd);
+ }
+
+ /**
+ * Check if the librarian has the given patron.
+ *
+ * @param patron The patron to check for.
+ * @return True if the librarian has the patron, false otherwise.
+ */
+ public boolean hasPatron(Patron patron) {
+ return this.getId().equals(patron.getId());
+ }
+}

lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/library/Library.java

@@ -12,6 +12,7 @@ public class Library {
  private Set<String> checkedOutIsbns = new HashSet<>();
  private Map<String, Set<Book>> checkedOutBooksByPatron = new HashMap<>();
  private Set<String> patronIds = new HashSet<>();
+ private Set<String> dvdIds = new HashSet<>(); // Added for DVDs
  private String id;
 
  /**
@@ -176,6 +177,6 @@ public String toString() {
  + checkedOutBooksByPatron
  + ", patronIds="
  + patronIds
- + '}';
+ + "}";
  }
 }

lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/library/Patron.java

@@ -59,6 +59,36 @@ public Set<Book> getCheckedOutBooks() throws LibraryNotSetException {
  return this.library.getCheckedOutByPatron(this);
  }
 
+ /**
+ * Check out a book from the library.
+ *
+ * @param book The book to check out.
+ * @return True if the book was successfully checked out, false otherwise.
+ */
+ public boolean checkOutBook(Book book) {
+ try {
+ return this.library.checkOutBook(book, this);
+ } catch (Exception e) {
+ System.out.println(e.getMessage());
+ return false;
+ }
+ }
+
+ /**
+ * Return a book to the library.
+ *
+ * @param book The book to return.
+ * @return True if the book was successfully returned, false otherwise.
+ */
+ public boolean checkInBook(Book book) {
+ try {
+ return this.library.checkInBook(book, this);
+ } catch (Exception e) {
+ System.out.println(e.getMessage());
+ return false;
+ }
+ }
+
  @Override
  public boolean equals(Object o) {
  if (this == o) return true;

lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/library/media/Dvd.java

@@ -0,0 +1,10 @@
+package com.codedifferently.lesson10.library.media;
+
+import com.codedifferently.lesson10.library.Book;
+import java.util.List;
+
+public class Dvd extends Book {
+ public Dvd(String id, String title, List<String> authors, int year) {
+ super(id, title, authors, year); // Updated constructor call with four arguments
+ }
+}

lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/library/media/Magazine.java

@@ -0,0 +1,25 @@
+package com.codedifferently.lesson10.library.media;
+
+public class Magazine {
+ private String title;
+ private String issueNumber;
+ private String publicationDate;
+
+ public Magazine(String title, String issueNumber, String publicationDate) {
+ this.title = title;
+ this.issueNumber = issueNumber;
+ this.publicationDate = publicationDate;
+ }
+
+ public String getTitle() {
+ return title;
+ }
+
+ public String getIssueNumber() {
+ return issueNumber;
+ }
+
+ public String getPublicationDate() {
+ return publicationDate;
+ }
+}

lesson_10/solid/solid_app/src/main/java/com/codedifferently/lesson10/library/media/Newspaper.java

@@ -0,0 +1,25 @@
+package com.codedifferently.lesson10.library.media;
+
+public class Newspaper {
+ private String title;
+ private String edition;
+ private String publicationDate;
+
+ public Newspaper(String title, String edition, String publicationDate) {
+ this.title = title;
+ this.edition = edition;
+ this.publicationDate = publicationDate;
+ }
+
+ public String getTitle() {
+ return title;
+ }
+
+ public String getEdition() {
+ return edition;
+ }
+
+ public String getPublicationDate() {
+ return publicationDate;
+ }
+}

lesson_10/solid/solid_app/src/test/java/com/codedifferently/lesson10/library/media/DvdTest.java

@@ -0,0 +1 @@
+

lesson_10/solid/solid_app/src/test/java/com/codedifferently/lesson10/library/media/MagazineTest.java

@@ -0,0 +1 @@
+

lesson_10/solid/solid_app/src/test/java/com/codedifferently/lesson10/library/media/NewspaperTest.java

@@ -0,0 +1 @@
+