Add min/max temperature watch face (#335)

movement/watch_faces/sensor/minmax_face.h

@@ -0,0 +1,69 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Mark Blyth
+ *
+ * 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 MINMAX_FACE_H_
+#define MINMAX_FACE_H_
+
+#include "movement.h"
+#include "watch.h"
+
+#define LOGGING_DATA_POINTS (24)
+
+/*
+ * Log for the min. and max. temperature over the last 24h.
+ *
+ * Temperature is logged once a minute, every minute. Results are
+ * stored, noting the highest and lowest temperatures observed within
+ * any given hour. The watch face then displays the minimum or maximum
+ * temperature recorded over the last 24h.
+ *
+ * A long press of the light button changes units between Celsius and
+ * Fahrenheit. Pressing the alarm button switches between displaying the
+ * minimum and maximum observed temperatures. If no buttons are pressed,
+ * the watch face will eventually time out and return home.
+ */
+
+typedef struct {
+  bool show_min;
+  bool have_logged;
+  float hourly_mins[LOGGING_DATA_POINTS];
+  float hourly_maxs[LOGGING_DATA_POINTS];
+} minmax_state_t;
+
+void minmax_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
+void minmax_face_activate(movement_settings_t *settings, void *context);
+bool minmax_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void minmax_face_resign(movement_settings_t *settings, void *context);
+bool minmax_face_wants_background_task(movement_settings_t *settings, void *context);
+
+#define minmax_face ((const watch_face_t){ \
+    minmax_face_setup, \
+    minmax_face_activate, \
+    minmax_face_loop, \
+    minmax_face_resign, \
+    minmax_face_wants_background_task, \
+})
+
+#endif // MINMAX_FACE_H_
+