Better command choosing logic

01_text_adventure/game.c

@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include "game.h"
 #include "input.h"
 #include "log.h"
@@ -31,12 +32,42 @@ void free_game(Game *g) {
   free(g);
 }
 
+bool string_in(const char *input, ...) {
+  va_list argp;
+  va_start(argp, input);
+  char *candidate;
+  while ((candidate = va_arg(argp, char*))) {
+    if (strcmp(input, candidate) == 0) {
+      va_end(argp);
+      return true;
+    }
+  }
+
+  return false;
+}
+
+Command command_from_string(const char *string) {
+  if (string_in(string, "QUIT", "Q", "EXIT", "CLOSE", NULL)) {
+    return COMMAND_QUIT;
+  } else if (string_in(string, "LOOK", "L", NULL)) {
+    return COMMAND_LOOK;
+  }
+
+  return COMMAND_UNKNOWN;
+}
+
 void game_handle_command(Game *g, const char *command) {
   Input *input = g->input;
-  if (strcmp(input->input_buffer, "QUIT") == 0) {
+
+  switch (command_from_string(command)) {
+  case COMMAND_QUIT:
     g->should_close = true;
-  } else if (strcmp(input->input_buffer, "LOOK") == 0) {
+    break;
+  case COMMAND_LOOK:
     push_line_to_log(input->log, g->current_room->description);
+    break;
+  default:
+    break;
   }
 }
 

01_text_adventure/game.h

@@ -1,8 +1,9 @@
 #ifndef _FD_GAME_
 #define _FD_GAME_
 
-#include <stdbool.h>
 typedef struct Game Game;
+
+#include <stdbool.h>
 #include "input.h"
 #include "room.h"
 #include "log.h"
@@ -15,6 +16,12 @@ struct Game {
   Room *current_room;
 };
 
+typedef enum Command {
+  COMMAND_LOOK,
+  COMMAND_QUIT,
+  COMMAND_UNKNOWN,
+} Command;
+
 Game *game_create(void);
 void game_handle_command(Game *g, const char *command);
 void game_load_rooms(Game *g);