Add object for storing API secrets.

src/main/java/moe/nekojimi/musicsearcher/SecretStore.java

@@ -0,0 +1,59 @@
+package moe.nekojimi.musicsearcher;
+
+import com.amihaiemil.eoyaml.Yaml;
+import com.amihaiemil.eoyaml.YamlMapping;
+import com.amihaiemil.eoyaml.YamlNode;
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+/**
+ *
+ * @author jim
+ */
+public class SecretStore 
+{
+    private static SecretStore secretStore;
+    
+    public static SecretStore get()
+    {
+        if (secretStore == null)
+            secretStore = new SecretStore();
+        return secretStore;
+    }
+    
+    private Map<String,String> secrets = new HashMap<>();
+    
+    private SecretStore()
+    {
+        try 
+        {
+            File file = new File("secrets.yml");
+            if (!file.exists())
+            {
+                System.out.println("WARNING: couldn't find secrets.yml. No API secrets available.");
+                return;
+            }
+            
+            YamlMapping yaml = Yaml.createYamlInput(file).readYamlMapping();
+            for (YamlNode key : yaml.keys())
+                secrets.put(key.asScalar().value(), yaml.string(key));
+        } catch (IOException ex) {
+            Logger.getLogger(SecretStore.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }
+    
+    public String getSecret(String key)
+    {
+        return secrets.getOrDefault(key,"");
+    }
+}