oblig ferdi

src/main/java/no/uib/inf101/terminal/CmdCd.java

+package no.uib.inf101.terminal;
+
+public class CmdCd implements Command {
+    Context context = new Context();
+
+
+    @Override
+    public void setContext(Context context){
+
+    }
+    
+    @Override
+    public String getName(){
+        return "cd";
+    }
+
+    @Override
+    public String run(String[] args){
+        if (args.length == 0) {
+            this.context.goToHome();
+            return "";
+          } else if (args.length > 1) {
+            return "cd: too many arguments";
+          }
+          String path = args[0];
+          if (this.context.goToPath(path)) {
+            return "";
+          } else {
+            return "cd: no such file or directory: " + path;
+          }
+    }
+}

src/main/java/no/uib/inf101/terminal/CmdLs.java

+package no.uib.inf101.terminal;
+
+import java.io.File;
+
+public class CmdLs implements Command {
+    Context context = new Context();
+
+
+    @Override
+    public void setContext(Context context){
+
+    }
+    
+    @Override
+    public String getName(){
+        return "ls";
+    }
+
+    @Override
+    public String run(String[] args){
+        File cwd = this.context.getCwd();
+        String s = "";
+        for (File file : cwd.listFiles()) {
+          s += file.getName();
+          s += " ";
+        }
+        return s;
+    }
+}

src/main/java/no/uib/inf101/terminal/CmdPwd.java

+package no.uib.inf101.terminal;
+
+public class CmdPwd implements Command{
+    Context context = new Context();
+
+
+    @Override
+    public void setContext(Context context){
+
+    }
+    
+    @Override
+    public String getName(){
+        return "pwd";
+    }
+
+    @Override
+    public String run(String[] args){
+        return this.context.getCwd().getAbsolutePath();
+    }
+}

src/main/java/no/uib/inf101/terminal/Command.java

@@ -4,4 +4,6 @@ public interface Command {
     String run(String[] args);
 
     String getName();
+
+    default void setContext(Context context) { /* do nothing */ };  
 }

src/main/java/no/uib/inf101/terminal/SimpleShell.java

@@ -33,7 +33,6 @@ public class SimpleShell implements CommandLineInterface {
   private final List<String> history = new ArrayList<>();
   /** The command currently being typed */
   private String currentCommand = "";
-  // TODO 4: Create instance variable storing Command objects
   private final HashMap<String, Command> allCommands = new HashMap<>();
   
   //////////////////////////////////////////////////////////////////////
@@ -43,7 +42,6 @@ public class SimpleShell implements CommandLineInterface {
 
   /** Constructor for SimpleShell */
   public SimpleShell() {
-    // TODO 7-8-9: Install core commands SimpleShell supports (pwd, ls, cd)
   }
 
   /**
@@ -77,9 +75,9 @@ public class SimpleShell implements CommandLineInterface {
     return s;
   }
 
-  // TODO 5: Add method to install a command
  public void installCommand(Command command){
   this.allCommands.put(command.getName(), command);
+  command.setContext(this.context);
 }
 
   //////////////////////////////////////////////////////////////////////
@@ -119,7 +117,10 @@ public class SimpleShell implements CommandLineInterface {
    * @return  The output of the command
    */
   private String executeCommand(String commandName, String[] args) {
-    // TODO 6: Call run on Command object for given commandName if present
+    Command command = this.allCommands.get(commandName);
+    if (command != null) {
+      return command.run(args);
+    } 
     // TODO 7-8-9: Remove if's for cd, ls, pwd once installed as commands
     if (Objects.equals(commandName, "pwd")) {
       return this.doPwd(args);