Extend configuration with preferences store

1 files changed, 76 insertions, 8 deletions

diff --git a/src/utils/Configuration.java b/src/utils/Configuration.java
index 0595a86..abb4df0 100644
--- a/src/utils/Configuration.java
+++ b/src/utils/Configuration.java
@@ -1,14 +1,82 @@
 package utils;
 
-// This class contains important values for the open authentication.
-public class Configuration
-{
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.Properties;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Global configuration including user-specific settings.
+ */
+public class Configuration {
+
     // The constumer secret value obtained from twitter.com
-    public static final String CONSUMER_SECRET   = "0aQLFiAwAgPHOYt6tziWoDftayQR7n3cUzMbGlhiNqsNNylLu4";
+    public static final String CONSUMER_SECRET = "0aQLFiAwAgPHOYt6tziWoDftayQR7n3cUzMbGlhiNqsNNylLu4";
     // The constumer public value obtained from twitter.com
-    public static final String CONSUMER_KEY      = "1Qc8Y5kmWIZy13m0hVxgGJOPt";
-    
+    public static final String CONSUMER_KEY = "1Qc8Y5kmWIZy13m0hVxgGJOPt";
+
     public static final String REQUEST_TOKEN_URL = "https://twitter.com/oauth/request_token";
-    public static final String AUTHORIZE_URL     = "https://twitter.com/oauth/authorize";
-    public static final String ACCESS_TOKEN_URL  = "https://twitter.com/oauth/access_token";
+    public static final String AUTHORIZE_URL = "https://twitter.com/oauth/authorize";
+    public static final String ACCESS_TOKEN_URL = "https://twitter.com/oauth/access_token";
+
+    private final Properties properties;
+    private final File storeFile;
+
+    private Configuration(File storeFile) {
+        this.storeFile = storeFile;
+        properties = new Properties(getDefaults());
+        try (FileInputStream fis = new FileInputStream(storeFile)) {
+            properties.load(fis);
+        } catch (FileNotFoundException ex) {
+            /* ignore non-existing configuration files, will be written later */
+        } catch (IOException ex) {
+            System.err.println("Could not load configuration: " + ex);
+        }
+    }
+
+    public static Configuration getConfig() {
+        return new Configuration(new File("config.txt"));
+    }
+
+    private Properties getDefaults() {
+        Properties defs = new Properties();
+        // set default preferences as needed
+        return defs;
+    }
+
+    /**
+     * Writes the configuration to file.
+     */
+    public void save() {
+        try (FileOutputStream fos = new FileOutputStream(storeFile)) {
+            properties.store(fos, "");
+        } catch (IOException ex) {
+            Logger.getLogger(getClass().getName()).log(Level.SEVERE,
+                    "Failed to save prefs", ex);
+        }
+    }
+
+    /**
+     * Changes a setting with the given key.
+     *
+     * @param key The key of the setting.
+     * @param val The new value for the setting.
+     */
+    public void setProperty(String key, String val) {
+        properties.setProperty(key, val);
+    }
+
+    /**
+     * Gets a setting with the given key.
+     *
+     * @param key Name of the configuration setting.
+     * @return The value for the key or null if there is none.
+     */
+    public String getProperty(String key) {
+        return properties.getProperty(key);
+    }
 }