Invaders Face (#210)

* invaders face: Initial commit, fully functional so far

* invaders face: silence compiler warning

* invaders face: prevent involuntary restarts when the game is over and save some bytes on flags

---------

Co-authored-by: joeycastillo <joeycastillo@utexas.edu>

movement/watch_faces/complication/invaders_face.h

@@ -0,0 +1,82 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Andreas Nebinger
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef INVADERS_FACE_H_
+#define INVADERS_FACE_H_
+
+#include "movement.h"
+
+/*
+ * Remake of the "famous" Casio Number Invaders Game
+ *
+ * This is an authentic remake of the invaders game, found on the Casio
+ * calculator wristwatch CA-85 or CA-851. There were also some calculators
+ * sold with this game, like MG-880.
+ * 
+ * How to play:
+ * 
+ * Press the alarm button to start the game.
+ * "Invaders" (just digits, tbh) will start coming in from the right hand side.
+ * Press the light button to "aim". The digit on the top of the display cycles
+ * from 0 to 9. If your aiming digit is identical to one of the invaders,
+ * press the alarm button to "shoot". The corresponding invader will disappear.
+ * If the invaders reach beneath the very first position, you loose one defense 
+ * line. When all three defense lines are gone, the game is over.
+ * Also: If you shoot more than 29 times per round, you loose the game.
+ * Good to know: There are 16 invaders per wave. There is a short break between
+ * waves.
+ * 
+ * What are the "n" invaders? Ufos!
+ * 
+ * Whenever the sum of all invaders shot is divisible by 10 the next invader 
+ * will be an ufo, represented by the n-symbol. Shooting a ufo gets you extra
+ * points. Example: shoot 2, 5, 3 --> ufo next
+ * 
+ * As for points: the earlier you shoot an invader, the more points you get.
+ *
+ * Anything else? Long pressing the light button toggles sound on or off. (Not
+ * while playing.)
+ * 
+ */
+
+typedef struct {
+    uint16_t highscore;
+    bool sound_on;
+} invaders_state_t;
+
+void invaders_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
+void invaders_face_activate(movement_settings_t *settings, void *context);
+bool invaders_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void invaders_face_resign(movement_settings_t *settings, void *context);
+
+#define invaders_face ((const watch_face_t){ \
+    invaders_face_setup, \
+    invaders_face_activate, \
+    invaders_face_loop, \
+    invaders_face_resign, \
+    NULL, \
+})
+
+#endif // INVADERS_FACE_H_
+