Implement BookStoreWebRestrictions class

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/java/com/fjordtek/bookstore/service/session/BookStoreWebRestrictions.java

@@ -0,0 +1,68 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
+package com.fjordtek.bookstore.service.session;
+
+import java.util.Arrays;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Service;
+
+import com.fjordtek.bookstore.model.book.BookRepository;
+
+/**
+ *
+ * This service class is implemented due to major
+ * security risks we encounter when publishing this
+ * application on the Internet <b>without any</b>
+ * user account restrictions, as this was intended
+ * and required for application demonstration purposes.
+ *
+ * @author Pekka Helenius
+ *
+ */
+
+@Service
+public class BookStoreWebRestrictions {
+
+	@Autowired
+	private Environment env;
+
+	@Autowired
+	private BookRepository bookRepository;
+
+	private boolean areRestrictionsEnabled(String profile) {
+
+		if ( Arrays.stream(env.getActiveProfiles()).anyMatch(p -> p.contains(profile)) ) {
+			if (Boolean.parseBoolean(env.getProperty("security.enabled"))) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	public boolean limitBookMaxCount(String profile) {
+
+		if (areRestrictionsEnabled(profile)) {
+
+			if (env.getProperty("security.book.count.max") != null) {
+
+				try {
+					int bookCountMax = Integer.parseInt(env.getProperty("security.book.count.max"));
+
+					if (bookRepository.count() == bookCountMax) {
+						return true;
+					}
+
+				} catch (NumberFormatException e) {
+					// TODO logging
+				}
+
+			}
+
+		}
+
+		return false;
+	}
+
+}