Merge pull request #3 from panki27/flagsbased-uncover

Uncover surrounding fields if number of set flags is correct. Thanks @gelin

README.md

@@ -9,6 +9,7 @@ This is a Minesweeper implementation for the Flipper Zero device.
 - Arrow buttons to move
 - Push center button to open field
 - Hold center button to toggle flag
+- Push center button on an already open field that has the correct amount of flags surrounding it to auto-open the remaining ones (thanks @gelin!)
 
 ## Compiling
 

minesweeper.c

@@ -305,7 +305,6 @@ static bool game_won(Minesweeper* minesweeper_state) {
   dialog_message_set_header(message, header_text, 64, 3, AlignCenter, AlignTop);
   dialog_message_set_text(message, furi_string_get_cstr(tempStr), 64, 32, AlignCenter, AlignCenter);
   dialog_message_set_buttons(message, NULL, "Play again", NULL);
-  // TODO: create icon
   dialog_message_set_icon(message, NULL, 72, 17);
 
   DialogMessageButton choice = dialog_message_show(dialogs, message);
@@ -315,17 +314,60 @@ static bool game_won(Minesweeper* minesweeper_state) {
   return choice == DialogMessageButtonCenter;
 }
 
+// returns false if the move loses the game - otherwise true
 static bool play_move(Minesweeper* minesweeper_state, int cursor_x, int cursor_y) {
-  if (minesweeper_state->playfield[cursor_x][cursor_y] != TileTypeUncleared) {
-      // we're on an already uncovered field
+  if (minesweeper_state->playfield[cursor_x][cursor_y] == TileTypeFlag) {
+    // we're on a flagged field, do nothing
     return true;
   }
   if (minesweeper_state->minefield[cursor_x][cursor_y] == FieldMine) {
-      // TODO: player loses!
+    // player loses - draw mine
     minesweeper_state->playfield[cursor_x][cursor_y] = TileTypeMine;
     return false;
-  } else {
-    // get number of surrounding mines.
+  }
+
+  if (minesweeper_state->playfield[cursor_x][cursor_y] >= TileType1 && minesweeper_state->playfield[cursor_x][cursor_y] <= TileType8) {
+    // click on a 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) {
+              if(!play_move(minesweeper_state, auto_x, auto_y)) {
+                // flags were wrong, we got a mine!
+                return false;
+              }
+            }
+          }
+        }
+      }
+      // we're done without hitting a mine - so return
+      return true;
+    }
+  }
+
+  // calculate number of surrounding mines.
   int hint = 0;
   for (int y = cursor_y-1; y <= cursor_y+1; y++) {
     for (int x = cursor_x-1; x <= cursor_x+1; x++) {
@@ -346,6 +388,7 @@ static bool play_move(Minesweeper* minesweeper_state, int cursor_x, int cursor_y
   minesweeper_state->fields_cleared++;
   FURI_LOG_D("Minesweeper", "Setting %d,%d to %d", cursor_x, cursor_y, hint);
   if (hint == 0) {
+    // the field is "empty"
     // auto open surrounding fields.
     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++) {
@@ -362,7 +405,6 @@ static bool play_move(Minesweeper* minesweeper_state, int cursor_x, int cursor_y
   }
   return true;
 }
-}
 
 static void minesweeper_state_init(Minesweeper* const minesweeper_state) {
     minesweeper_state->cursor_x = minesweeper_state->cursor_y = 0;