add auto uncover cells on second click to the cell with number, as it's done by left-right click on desktop minesweeper

minesweeper.c

@@ -313,6 +313,41 @@ static bool game_won(Minesweeper* minesweeper_state) {
 }
 
 static bool play_move(Minesweeper* minesweeper_state, int cursor_x, int cursor_y) {
+  if (minesweeper_state->playfield[cursor_x][cursor_y] >= TileType1 && minesweeper_state->playfield[cursor_x][cursor_y] <= TileType8) {
+    // click on an cleared cell with a number
+    // count the flags around
+    int flags = 0;
+    for (int y = cursor_y-1; y <= cursor_y+1; y++) {
+      for (int x = cursor_x-1; x <= cursor_x+1; x++) {
+        if ( x == cursor_x && y == cursor_y ) {
+          // we're on the cell the user selected, so ignore.
+          continue;
+        }
+        // make sure we don't go OOB
+        if ( x >= 0 && x < PLAYFIELD_WIDTH && y >= 0 && y < PLAYFIELD_HEIGHT) {
+          if (minesweeper_state->playfield[x][y] == TileTypeFlag) {
+              flags ++;
+          }
+        }
+      }
+    }
+    int mines = minesweeper_state->playfield[cursor_x][cursor_y];   // ¯\_(ツ)_/¯
+    if (flags == mines) {
+      // auto uncover all non-flags around (to win faster ;)
+      for (int auto_y = cursor_y-1; auto_y <= cursor_y+1; auto_y++) {
+        for (int auto_x = cursor_x-1; auto_x <= cursor_x+1; auto_x++) {
+          if ( auto_x == cursor_x && auto_y == cursor_y ) {
+            continue;
+          }
+          if ( auto_x >= 0 && auto_x < PLAYFIELD_WIDTH && auto_y >= 0 && auto_y < PLAYFIELD_HEIGHT) {
+            if (minesweeper_state->playfield[auto_x][auto_y] == TileTypeUncleared) {
+              play_move(minesweeper_state, auto_x, auto_y);
+            }
+          }
+        }
+      }
+    }
+  }
   if (minesweeper_state->playfield[cursor_x][cursor_y] != TileTypeUncleared) {
       // we're on an already uncovered field
       return true;