3 files changed, 87 insertions, 17 deletions
diff --git a/src/main/java/edu/brown/cs/student/stars/Main.java b/src/main/java/edu/brown/cs/student/term/Main.java
index 61127b5..c436b2e 100644
--- a/src/main/java/edu/brown/cs/student/stars/Main.java
+++ b/src/main/java/edu/brown/cs/student/term/Main.java
@@ -1,24 +1,11 @@
-package edu.brown.cs.student.stars;
-
-import java.io.File;
-import java.io.IOException;
-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.util.Map;
+package edu.brown.cs.student.term;
 
+import edu.brown.cs.student.term.repl.Command;
+import edu.brown.cs.student.term.repl.REPL;
 import joptsimple.OptionParser;
 import joptsimple.OptionSet;
-import spark.ExceptionHandler;
-import spark.ModelAndView;
-import spark.Request;
-import spark.Response;
-import spark.Spark;
-import spark.TemplateViewRoute;
-import spark.template.freemarker.FreeMarkerEngine;
-
-import com.google.common.collect.ImmutableMap;
 
-import freemarker.template.Configuration;
+import java.util.HashMap;
 
 /**
  * The Main class of our project. This is where execution begins.
@@ -57,6 +44,11 @@ public final class Main {
       //runSparkServer((int) options.valueOf("port"));
     }
 
+    HashMap<String, Command> commandHashMap = new HashMap<>();
+    /** add commands to map here! */
+    REPL repl = new REPL(commandHashMap);
+    repl.runREPL();
+
     // TODO: Process commands in a REPL
   }
 }
 \ No newline at end of file
diff --git a/src/main/java/edu/brown/cs/student/term/repl/Command.java b/src/main/java/edu/brown/cs/student/term/repl/Command.java
new file mode 100644
index 0000000..f8b0b04
--- /dev/null
+++ b/src/main/java/edu/brown/cs/student/term/repl/Command.java
@@ -0,0 +1,19 @@
+package edu.brown.cs.student.term.repl;
+
+/**
+ * Interface implemented by all five StarsCommand commands.
+ * Implemented by StarsCommand, NaiveNeighbors, NaiveRadiusCommand, RadiusCommand, NeighborsCommand
+ */
+public interface Command {
+  /**
+   * Main run method for every command.
+   * @param args arguments for the command
+   */
+  String run(String[] args);
+
+  /**
+   * Used to print command output to GUI.
+   * @return    String representing neighbors found by NeighborsCommand and RadiusCommand commands
+   */
+  String toString();
+}
diff --git a/src/main/java/edu/brown/cs/student/term/repl/REPL.java b/src/main/java/edu/brown/cs/student/term/repl/REPL.java
new file mode 100644
index 0000000..0be7e3f
--- /dev/null
+++ b/src/main/java/edu/brown/cs/student/term/repl/REPL.java
@@ -0,0 +1,59 @@
+package edu.brown.cs.student.term.repl;
+import edu.brown.cs.student.term.repl.Command;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * REPL Class maps input to proper class and function for that command.
+ */
+public class REPL {
+
+  private Map<String, Command> commands;
+
+  /**
+   * Constructor for a REPL object.
+   */
+  public REPL(HashMap<String, Command> userCommands) {
+    commands = userCommands;
+  }
+
+  /**
+   * Gets the current map of commands the REPL supports.
+   * @return the command map
+   */
+  public Map<String, Command> getReplCommandMap() {
+    return commands; }
+
+  /**
+   * Reads user input, maps it to the correct command, and continues.
+   */
+  public void runREPL() {
+    BufferedReader commandHandler = new BufferedReader(new InputStreamReader(System.in));
+    try {
+      String command = commandHandler.readLine();
+      while (command != null) {
+        String[] commandPieces = command.split("\\s+(?=([^\"]*\"[^\"]*\")*[^\"]*$)");
+
+        if (commands.containsKey(commandPieces[0])) {
+          Command desiredCommand = commands.get(commandPieces[0]);
+
+          String[] arguments = Arrays.copyOfRange(commandPieces, 1, commandPieces.length);
+
+          desiredCommand.run(arguments);
+        } else {
+          System.out.println("ERROR: Sorry, command not recognized! Please try again.");
+        }
+
+        command = commandHandler.readLine();
+      }
+    } catch (IOException e) {
+      //might wanna change this later
+      System.out.println("ERROR: Could not locate specified file!");
+    }
+  }
+}