3 files changed, 248 insertions, 0 deletions
diff --git a/ufund-api/src/main/java/com/ufund/api/ufundapi/service/AuthService.java b/ufund-api/src/main/java/com/ufund/api/ufundapi/service/AuthService.java
new file mode 100644
index 0000000..5a1a492
--- /dev/null
+++ b/ufund-api/src/main/java/com/ufund/api/ufundapi/service/AuthService.java
@@ -0,0 +1,70 @@
+package com.ufund.api.ufundapi.service;
+
+import com.ufund.api.ufundapi.model.User;
+import com.ufund.api.ufundapi.model.UserAuth;
+import com.ufund.api.ufundapi.persistence.UserAuthDAO;
+import org.springframework.stereotype.Component;
+
+import java.io.IOException;
+
+@Component
+public class AuthService {
+
+    private final UserAuthDAO userAuthDAO;
+    private final UserService userService;
+
+    public AuthService(UserAuthDAO userAuthDAO, UserService userService) {
+        this.userAuthDAO = userAuthDAO;
+        this.userService = userService;
+    }
+
+    /**
+     * Check if the provided key has access to the provided user.
+     *
+     * @param targetUsername The targetUsername of the user trying to be accessed.
+     * @param key The api key obtained by the client from logging in.
+     * @throws IllegalAccessException Thrown if access was denied to the user.
+     */
+    public void authenticate(String targetUsername, String key) throws IllegalAccessException, IOException {
+        var userAuth = userAuthDAO.getUserAuth(key);
+        if (userAuth == null) {
+            throw new IllegalAccessException("Unauthenticated");
+        }
+
+        var username = userAuth.getUsername();
+        var userType = userService.getUser(username).getType();
+        if (!username.equals(targetUsername) && userType != User.UserType.MANAGER) {
+            throw new IllegalAccessException("Unauthorized");
+        }
+    }
+
+    /**
+     * Attempt to log in with the provided credentials
+     *
+     * @param username The username of the user
+     * @param password The password of the user
+     * @return An API key if the authentication was successful.
+     * @throws IllegalAccessException Thrown if the username or password was incorrect
+     * @throws IOException If there was an issue saving the authentication
+     */
+    public String login(String username, String password) throws IllegalAccessException, IOException {
+        var usr = userService.getUser(username);
+        if (usr == null || !usr.verifyPassword(password)) {
+            throw new IllegalAccessException("Unauthorized");
+        }
+        var userAuth = UserAuth.generate(username);
+        userAuthDAO.addUserAuth(userAuth);
+        return userAuth.getKey();
+    }
+
+    /**
+     * Logs out the current user
+     *
+     * @param key The API key to of the client
+     * @throws IOException Thrown if there was an error saving the authentication
+     */
+    public void logout(String key) throws IOException {
+        userAuthDAO.removeUserAuth(key);
+    }
+
+}
diff --git a/ufund-api/src/main/java/com/ufund/api/ufundapi/service/CupboardService.java b/ufund-api/src/main/java/com/ufund/api/ufundapi/service/CupboardService.java
new file mode 100644
index 0000000..78f8f85
--- /dev/null
+++ b/ufund-api/src/main/java/com/ufund/api/ufundapi/service/CupboardService.java
@@ -0,0 +1,106 @@
+package com.ufund.api.ufundapi.service;
+
+import java.io.IOException;
+import java.util.Arrays;
+
+import org.springframework.stereotype.Component;
+
+import com.ufund.api.ufundapi.DuplicateKeyException;
+import com.ufund.api.ufundapi.model.Need;
+import com.ufund.api.ufundapi.persistence.CupboardDAO;
+
+@Component
+public class CupboardService {
+
+    private final CupboardDAO cupboardDAO;
+
+    public CupboardService(CupboardDAO cupboardDAO) {
+        this.cupboardDAO = cupboardDAO;
+    }
+
+    /**
+     * Creates a new Need
+     *
+     * @param name The name of the need to create
+     * @param maxGoal The max goal of the new need
+     * @param goalType The goal type of the new need
+     * @return The need that was created
+     * @throws IOException Thrown if there was any issue saving the data
+     * @throws DuplicateKeyException If there already exists a need with the same name
+     */
+    public Need createNeed(String name, double maxGoal, Need.GoalType goalType) throws IOException, DuplicateKeyException {
+
+        if (maxGoal <= 0) {
+            throw new IllegalArgumentException("Max Goal must be greater than zero");
+        }
+
+        for (Need searchNeed : cupboardDAO.getNeeds()) {
+            if (searchNeed.getName().equalsIgnoreCase(name)) {
+                throw new DuplicateKeyException("Duplicate names are not allowed");
+            }
+        }
+
+        Need need = new Need(name, goalType, maxGoal);
+        return cupboardDAO.addNeed(need);
+
+    }
+
+    /**
+     * Get all the needs in the cupboard
+     *
+     * @return An array containing all needs
+     * @throws IOException Thrown if there was any issue saving the data
+     */
+    public Need[] getNeeds() throws IOException {
+        return cupboardDAO.getNeeds();
+    }
+
+    /**
+     * Returns an array of needs filtered by a search
+     *
+     * @param search The search substring
+     * @return The requested array
+     * @throws IOException Thrown if there was any issue saving the data
+     */
+    public Need[] searchNeeds(String search) throws IOException {
+        return Arrays.stream(cupboardDAO.getNeeds())
+                .filter(i -> i.getName().toLowerCase().contains(search.toLowerCase()))
+                .toArray(Need[]::new);
+    }
+
+    /**
+     * Gets a need with the specified ID
+     *
+     * @param id the ID of the need
+     * @return The resulting Need or null if the need was not found
+     */
+    public Need getNeed(int id) throws IOException {
+        return cupboardDAO.getNeed(id);
+    }
+
+    /**
+     * Updates a need
+     *
+     * @param id The ID of the need to update
+     * @param need The need object to set (note: the ID is ignored)
+     * @return The updated need object
+     * @throws IOException Thrown if there was an issue saving the changes
+     */
+    public Need updateNeed(Need need, int id) throws IOException {
+        if (need.getId() != id) {
+            throw new IllegalArgumentException("ID in URL and body must match");
+        }
+        return cupboardDAO.updateNeed(need);
+    }
+
+    /**
+     * Delete a need from the cupboard
+     *
+     * @param id the ID of the need
+     * @return True if the need was deleted
+     * @throws IOException Thrown on any problem removing the need
+     */
+    public boolean deleteNeed(int id) throws IOException {
+        return cupboardDAO.deleteNeed(id);
+    }
+}
diff --git a/ufund-api/src/main/java/com/ufund/api/ufundapi/service/UserService.java b/ufund-api/src/main/java/com/ufund/api/ufundapi/service/UserService.java
new file mode 100644
index 0000000..935ee72
--- /dev/null
+++ b/ufund-api/src/main/java/com/ufund/api/ufundapi/service/UserService.java
@@ -0,0 +1,72 @@
+package com.ufund.api.ufundapi.service;
+
+import java.io.IOException;
+
+import com.ufund.api.ufundapi.DuplicateKeyException;
+import com.ufund.api.ufundapi.model.User;
+import com.ufund.api.ufundapi.persistence.UserDAO;
+import org.springframework.stereotype.Component;
+
+@Component
+public class UserService {
+
+    private final UserDAO userDAO;
+
+    public UserService(UserDAO userDao) {
+        this.userDAO = userDao;
+    }
+
+    /**
+     * Creates a new user
+     *
+     * @param username The username of the user
+     * @param password The password of the user
+     * @return The created user object
+     * @throws IOException Thrown on any problem saving the file
+     */
+    public User createUser(String username, String password) throws IOException, DuplicateKeyException {
+        if (userDAO.getUser(username) != null) {
+            throw new DuplicateKeyException("A user with this name already exists");
+        }
+        User user = User.create(username, password);
+        return userDAO.addUser(user);
+    }
+
+    /**
+     * Gets a user with the given username
+     *
+     * @param username The username of the user
+     * @return The user object with that username
+     * @throws IOException If there was any problem saving the file
+     */
+    public User getUser(String username) throws IOException {
+        return userDAO.getUser(username);
+    }
+
+    /**
+     * Updates a user
+     *
+     * @param user The ID of the user to update
+     * @param username The user object to set (note: the ID is ignored)
+     * @return The updated user object
+     * @throws IOException Thrown if there was any issue saving the data
+     */
+    public User updateUser(User user, String username) throws IOException {
+        if (!user.getUsername().equals(username)) {
+            throw new IllegalArgumentException("ID in URL and body must match");
+        }
+        return userDAO.updateUser(user);
+    }
+
+    /**
+     * Deletes a user
+     *
+     * @param username The username of the user to delete
+     * @return True if the user was deleted
+     * @throws IOException Thrown if there was any issue saving the data
+     */
+    public boolean deleteUser(String username) throws IOException {
+        return userDAO.deleteUser(username);
+    }
+    
+}