1 files changed, 198 insertions, 0 deletions
diff --git a/Week9/src/com/camilstaps/shop/UserInteraction.java b/Week9/src/com/camilstaps/shop/UserInteraction.java
new file mode 100644
index 0000000..a857f85
--- /dev/null
+++ b/Week9/src/com/camilstaps/shop/UserInteraction.java
@@ -0,0 +1,198 @@
+/**
+ * Copyright (c) 2015 Camil Staps <info@camilstaps.nl>
+ * See the LICENSE file for copying permission.
+ */
+
+package com.camilstaps.shop;
+
+import java.util.Set;
+
+/**
+ * Interact with the user: provide and request information.
+ * @author Camil Staps, s4498062
+ */
+public abstract class UserInteraction {
+    
+    /**
+     * Show a String
+     * @param string 
+     */
+    abstract void putString(String string);
+    
+    /**
+     * Show a String with a linefeed
+     * @param string 
+     */
+    void putStringLn(String string) {
+        putString(string + System.lineSeparator());
+    }
+    
+    /**
+     * Get a String as input
+     * @return 
+     */
+    abstract String getString();
+    
+    /**
+     * Get a String as input, after outputting a question
+     * @param question
+     * @return 
+     */
+    String getString(String question) {
+        putString(question);
+        return getString();
+    }
+    
+    /**
+     * Get a String as input, and throw an Exception when it's empty
+     * @return
+     * @throws InputRequiredException 
+     */
+    String getRequiredString() throws InputRequiredException {
+        String result = getString();
+        if (result.isEmpty()) throw new InputRequiredException();
+        return result;
+    }
+    
+    /**
+     * Get a String as input, after outputting a question, and throw an 
+     * Exception when the input is empty
+     * @param question
+     * @return
+     * @throws InputRequiredException 
+     */
+    String getRequiredString(String question) throws InputRequiredException {
+        putString(question);
+        return getRequiredString();
+    }
+    
+    /**
+     * Get a float as input
+     * @return 
+     */
+    abstract float getFloat();
+    
+    /**
+     * Get a float as input, after outputting a question
+     * @param question
+     * @return 
+     */
+    float getFloat(String question) {
+        putString(question);
+        return getFloat();
+    }
+    
+    /**
+     * Get a boolean as input
+     * @return 
+     */
+    abstract boolean getBoolean();
+    
+    /**
+     * Get a boolean as input, after outputting a question
+     * @param question
+     * @return 
+     */
+    boolean getBoolean(String question) {
+        putString(question);
+        return getBoolean();
+    }
+    
+    /**
+     * Get a Command as input
+     * @return 
+     */
+    abstract Command getCommand();
+
+    /**
+     * Let the user choose from an array of options, after outputting a question
+     * @param question
+     * @param options
+     * @return the index of the choice in the options array
+     */
+    abstract int getChoice(String question, String[] options);
+    
+    /**
+     * Let the user choose from a Set of Articles
+     * @param set
+     * @return 
+     */
+    Article getArticle(Set<Article> set) {
+        String[] articleNames = new String[set.size()];
+        Article[] articles = new Article[set.size()];
+        int i = 0;
+        for (Article a : set) {
+            articleNames[i] = a.toString();
+            articles[i++] = a;
+        }
+        return articles[getChoice("Article: ", articleNames)];
+    }
+    
+    /**
+     * Let the user choose an Article
+     * @return
+     * @throws InputRequiredException
+     * @throws ItemNotFoundException 
+     */
+    Article getArticle() throws InputRequiredException, ItemNotFoundException {
+        String name = getRequiredString("Name article: ");
+        return Database.getInstance().getArticle(name);
+    }
+    
+    /**
+     * Let the user choose an Article from the Articles of a specific User
+     * @param user
+     * @return 
+     */
+    Article getArticle(User user) {
+        return getArticle(user.getArticles());
+    }
+    
+    /**
+     * Let the user choose a category
+     * @return
+     * @throws ItemNotFoundException 
+     */
+    Category getCategory() throws ItemNotFoundException {
+        String[] categories = Database.getInstance().getCategoryNames();
+        return Database.getInstance().getCategory(categories[getChoice("Category: ", categories)]);
+    }
+    
+    /**
+     * Let the user choose a User
+     * @return
+     * @throws InputRequiredException
+     * @throws ItemNotFoundException 
+     */
+    User getUser() throws InputRequiredException, ItemNotFoundException {
+        return Database.getInstance().getUser(getRequiredString("Number user: "));
+    }
+    
+    /**
+     * Let the user choose an order
+     * @return
+     * @throws InputRequiredException
+     * @throws ItemNotFoundException 
+     */
+    Order getOrder() throws InputRequiredException, ItemNotFoundException {
+        return getOrder(getUser());
+    }
+    
+    /**
+     * Let the user choose an order, from the orders of a specific User
+     * @param user
+     * @return 
+     */
+    Order getOrder(User user) {
+        Set<Order> orders = user.getOrders();
+        String[] orderStrings = new String[orders.size()];
+        Order[] orderObjects = new Order[orders.size()];
+        int i = 0;
+        for (Order o : orders) {
+            orderStrings[i] = o.toString();
+            orderObjects[i++] = o;
+        }
+        return orderObjects[getChoice("Order: ", orderStrings)];
+    }
+
+}
+\ No newline at end of file