feat: add tile preview with rotation

3 files changed, 50 insertions, 7 deletions

diff --git a/src/board.c b/src/board.c
index 263e205..056156c 100644
--- a/src/board.c
+++ b/src/board.c
@@ -48,6 +48,17 @@ int place_tile(Tile tile, int index, BoardUnit* board, int force) {
   return 1;
 }
 
+void rotate_tile(Tile* tile, int increment) {
+  char buffer[8];
+  for (int i = 0; i < 8; i++) {
+    buffer[i] = tile->edges[i % 4];
+  }
+
+  for (int i = 0; i < 4; i++) {
+    tile->edges[i] = buffer[i + (increment % 4)];
+  }
+}
+
 void traverse_structure(int group, int index, BoardUnit* board) {
   board[index].structure_group = group;
   for (int i = 0; i < 4; i++) {
diff --git a/src/board.h b/src/board.h
index e0acd1f..9745e3a 100644
--- a/src/board.h
+++ b/src/board.h
@@ -28,6 +28,7 @@ int is_center_index(int index);
 /* tiles */
 int is_allowed_placement(Tile tile, int index, BoardUnit* board);
 int place_tile(Tile tile, int index, BoardUnit* board, int force);
+void rotate_tile(Tile* tile, int increment);
 
 /* structures */
 void traverse_structure(int group, int index, BoardUnit* board);
diff --git a/src/main.c b/src/main.c
index 680b9c3..09ca804 100644
--- a/src/main.c
+++ b/src/main.c
@@ -25,6 +25,14 @@ void draw_structures(BoardUnit* board, WINDOW* win) {
   }
 }
 
+void preview_tile(Tile tile, WINDOW* win) {
+  mvwaddch(win, 1, 1, tile.center);
+  mvwaddch(win, 0, 1, tile.edges[0]);
+  mvwaddch(win, 1, 2, tile.edges[1]);
+  mvwaddch(win, 2, 1, tile.edges[2]);
+  mvwaddch(win, 1, 0, tile.edges[3]);
+}
+
 int main() {
   /* initialize curses */
   initscr();
@@ -48,6 +56,12 @@ int main() {
   box(input_box, 0, 0);
   wrefresh(input_box);
 
+  /* create tile inspector window */
+  WINDOW* tile_box = newwin(5, 5, BOARD_ROW_UNITS + 3, 60);
+  WINDOW* tile_win = derwin(tile_box, 3, 3, 1, 1);
+  box(tile_box, 0, 0);
+  wrefresh(tile_box);
+
   /* create messages window */
   WINDOW* messages_box = newwin(40, 60, BOARD_ROW_UNITS + 6, 0);
   WINDOW* messages_win = derwin(messages_box, 40 - 2, 60 - 2, 1, 1);
@@ -58,11 +72,18 @@ int main() {
   BoardUnit board[BOARD_UNITS];
   initialize_board(board);
 
+  Tile tileset[3] = {
+    { "RRRR", 'R', 0 },
+    { "FCCC", 'C', 0 },
+    { "FFFC", 'C', 0 }
+  };
+
   Tile tile = { "FRCR", 'R', 0 };
   place_tile(tile, translate_coordinate(24), board, 1);
 
   /* main loop */
   char position[3];
+  char rotation_input;
   while (1) {
     /* prepare */
     refresh_structure_groups(board);
@@ -74,18 +95,28 @@ int main() {
     wrefresh(board_win);
     wrefresh(structures_win);
 
-    /* user input */
-    box(input_box, 0, 0);
-    mvwaddstr(input_box, 0, 0, "Enter tile:");
-    wrefresh(input_box);
-    wgetnstr(input_win, tile.edges, 5);
-    wclear(input_win);
-    if (tile.edges[0] == 'q') break;
+    /* tile pickup */
+    tile = tileset[rand() % 3];
+
+    while (1) {
+      preview_tile(tile, tile_win);
+      wrefresh(tile_win);
 
+      rotation_input = wgetch(tile_win);
+      if (rotation_input == 10) break; /* enter key */
+      else if (rotation_input == 'j') rotate_tile(&tile, 1);
+      else if (rotation_input == 'k') rotate_tile(&tile, 3);
+    }
+
+    /* position prompt */
+    echo();
     box(input_box, 0, 0);
     mvwaddstr(input_box, 0, 0, "Enter position:");
     wrefresh(input_box);
     wgetnstr(input_win, position, 3);
+    noecho();
+
+    if (position[0] == 'q') break;
 
     int result = place_tile(tile, translate_coordinate(atoi(position)), board, 0);
     if (result) wprintw(messages_win, "Placed tile %s (%c) at position %i\n", tile.edges, tile.center, atoi(position));