Move from room to room!

01_text_adventure/game.c

@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <stdarg.h>
 #include "game.h"
+#include "transition.h"
 #include "input.h"
 #include "log.h"
 
@@ -74,6 +75,22 @@ Command command_from_string(const char *string) {
   return COMMAND_UNKNOWN;
 }
 
+#define INVALID_DIRECTIONAL_COMMAND "I can't go %s from here"
+void game_handle_directional_command(Game *g, const char *c) {
+  Room *r = g->current_room;
+  Transition *transition = find_transition(g->transitions, r, command_from_string(c));
+
+  if (transition) {
+    push_line_to_log(g->input->log, transition->description);
+    g->current_room = transition->to;
+  } else {
+    char *response = malloc(strlen(INVALID_DIRECTIONAL_COMMAND) + strlen(c) + 1);
+    sprintf(response, INVALID_DIRECTIONAL_COMMAND, c);
+    push_line_to_log(g->input->log, response);
+    free(response);
+  }
+}
+
 #define INVALID_COMMAND "I don't know how to "
 void game_handle_command(Game *g, const char *command) {
   Input *input = g->input;
@@ -85,6 +102,12 @@ void game_handle_command(Game *g, const char *command) {
   case COMMAND_LOOK:
     push_line_to_log(input->log, g->current_room->description);
     break;
+  case COMMAND_NORTH:
+  case COMMAND_SOUTH:
+  case COMMAND_EAST:
+  case COMMAND_WEST:
+    game_handle_directional_command(g, command);
+    break;
   default:
     char *response = malloc(strlen(INVALID_COMMAND) + strlen(command) + 1);
     sprintf(response, INVALID_COMMAND "%s", command);

01_text_adventure/main.c

@@ -15,6 +15,7 @@ int main(void) {
 
     Game *g = game_create();
     game_load_rooms(g);
+    game_load_transitions(g);
 
     game_run_until_close(g);
     CloseWindow();

01_text_adventure/transition.c

@@ -30,3 +30,12 @@ void game_load_transitions(Game *g) {
 
   fclose(transitions_file);
 }
+
+Transition *find_transition(Transitions *t, Room *from, Command via) {
+  for (int i = 0; i < t->count; i++) {
+    Transition *candidate = &t->transitions[i];
+    if (candidate->from == from && candidate->via == via) return candidate;
+  }
+
+  return NULL;
+}

01_text_adventure/transition.h

@@ -20,5 +20,6 @@ struct Transitions {
 };
 
 void game_load_transitions(Game *g);
+Transition *find_transition(Transitions *t, Room *from, Command via);
 
 #endif