[Add] Process cd and ls commands.

client/src/client_network.cpp

@@ -66,8 +66,10 @@ std::string ClientNetwork::receive_response(void) {
   memset(buffer, 0, sizeof(buffer));
 
   void* socket_ptr = _socket;
+  /* Wait up to 2 seconds for data to be available. */
   if(NET_WaitUntilInputAvailable(&socket_ptr, 1, 2000) > 0) {
-    if(NET_ReadFromStreamSocket(_socket, buffer, sizeof(buffer)) > 0) {
+    int bytes_received = NET_ReadFromStreamSocket(_socket, buffer, sizeof(buffer)-1);
+    if(bytes_received > 0) {
       return std::string(buffer);
     }
   }

client/src/terminal.cpp

@@ -1,4 +1,5 @@
 #include <cstdio>
+#include <sstream>
 #include <SDL3/SDL.h>
 #include <GL/glew.h>
 #include <SDL3/SDL_events.h>
@@ -10,13 +11,14 @@
 Terminal::Terminal(void) {
   /* Placeholder welcome message to history. */
   _history.push_back("Welcome to Bettola");
-  _scroll_offset = 0;
   _network = new ClientNetwork();
   if(_network->connect("localhost", 8080)) {
     _history.push_back("Connection to server Success!");
   } else {
     _history.push_back("Connection to server failed!");
   }
+  _current_path = "/";
+  _scroll_offset = 0;
 }
 
 Terminal::~Terminal(void) {
@@ -33,8 +35,16 @@ void Terminal::_on_ret_press(void) {
   printf("Command entered: %s\n", _input_buffer.c_str());
   _network->send_command(_input_buffer.c_str());
   std::string response = _network->receive_response();
-  if(!response.empty()) {
-    _history.push_back(response);
+  /* Check if the response is a new path for the prompt. */
+  if(response.rfind("/", 0) == 0 && response.find('\n') == std::string::npos) {
+    _current_path = response;
+  } else if(!response.empty()) {
+    /* Otherwise, it's command out. Split it by newline and add to history. */
+    std::stringstream ss(response);
+    std::string line;
+    while(std::getline(ss, line, '\n')) {
+      _history.push_back(line);
+    }
   }
 
   if(_input_buffer == "clear") {
@@ -106,7 +116,7 @@ void Terminal::render(TextRenderer* renderer, int x, int y, int width, int heigh
   }
 
   /* Draw current input line. */
-  std::string line_to_render = "> " + _input_buffer;
+  std::string line_to_render = _current_path + "> " + _input_buffer;
   if(show_cursor) {
     line_to_render += "_";
   }

client/src/terminal.h

@@ -21,5 +21,6 @@ private:
   std::string _input_buffer;
   std::vector<std::string> _history;
   int _scroll_offset;
+  std::string _current_path;
   ClientNetwork* _network;
 };

common/src/vfs.cpp

@@ -0,0 +1,11 @@
+#include "vfs.h"
+
+std::string get_full_path(vfs_node* node) {
+  if(node->parent == nullptr) {
+    return "/";
+  }
+  if(node->parent->parent == nullptr) { /* If parent is root. */
+    return "/" + node->name;
+  }
+  return get_full_path(node->parent) + "/" + node->name;
+}

common/src/vfs.h

@@ -24,3 +24,5 @@ struct vfs_node {
   vfs_child_map children;
   vfs_node* parent;
 };
+
+std::string get_full_path(vfs_node* node);

server/src/network_manager.cpp

@@ -1,6 +1,7 @@
 #include <cstdio>
 #include <cstring>
 
+#include "SDL_net.h"
 #include "vfs.h"
 
 #include "network_manager.h"
@@ -72,8 +73,37 @@ void NetworkManager::_handle_client_activity(void) {
 }
 
 void NetworkManager::_process_command(Player* player, char* command) {
-  /* We'll just do 'ls' for now. */
-  if(strncmp(command, "ls", 2) == 0) {
+  /* Remove trailing newline for command comparison. */
+  std::string cmd_str = command;
+  if(!cmd_str.empty() && cmd_str.back() == '\n') {
+    cmd_str.pop_back();
+  }
+  if(strncmp(command, "cd ", 3) == 0) {
+    /* Handle 'cd' command. */
+    std::string target_dir_name = command + 3;
+    /* Remove trailing newline if it exists. */
+    if(!target_dir_name.empty() && target_dir_name.back() == '\n') {
+      target_dir_name.pop_back();
+    }
+
+    if(target_dir_name == "..") {
+      if(player->current_dir->parent) {
+        player->current_dir = player->current_dir->parent;
+      }
+    } else if(player->current_dir->children.count(target_dir_name)) {
+      vfs_node* target_node = player->current_dir->children[target_dir_name];
+      if(target_node->type == DIR_NODE) {
+        player->current_dir = target_node;
+      } else {
+        /* It's a file, not a directory. */
+        NET_WriteToStreamSocket(player->socket, "cd: not a directory\n", 22);
+        return;
+      }
+    }
+    /* On successful cd, send back the new path for the prompt. */
+    std::string new_path = get_full_path(player->current_dir);
+    NET_WriteToStreamSocket(player->socket, new_path.c_str(), new_path.length()+1);
+  } else if(cmd_str == "ls") {
     std::string response = "";
     if(player->current_dir && player->current_dir->type == DIR_NODE) {
       for(auto const& [name, node] : player->current_dir->children) {
@@ -81,11 +111,18 @@ void NetworkManager::_process_command(Player* player, char* command) {
         if(node->type == DIR_NODE) {
           response += "/";
         }
-        response += "\n";
+        response += "  ";
       }
     }
     /* NET_WriteToStreamSocket is essentially the new send function in SDL3. */
     NET_WriteToStreamSocket(player->socket, response.c_str(), response.length()+1);
+  } else if(cmd_str == "clear") {
+    /* Send an empty reply to unblock. */
+    NET_WriteToStreamSocket(player->socket, "", 1);
+  } else {
+    /* Unknown command. */
+    std::string response = "Unknown command: " + cmd_str + "\n";
+    NET_WriteToStreamSocket(player->socket, response.c_str(), response.length()+1);
   }
 }