Simple Mercies 1.1: tap the question for a different one

app/src/main/java/space/bloggin/mercies/Theme.kt

@@ -73,6 +73,8 @@ class Prefs private constructor(ctx: Context) {
     private val _mornH = mutableIntStateOf(p.getInt("mornH", 7))
     private val _mornM = mutableIntStateOf(p.getInt("mornM", 45))
     private val _shake = mutableStateOf(p.getBoolean("shake", true))
+    private val _promptDay = mutableStateOf(p.getString("promptDay", "") ?: "")
+    private val _promptShift = mutableIntStateOf(p.getInt("promptShift", 0))
 
     var look: Int get() = _look.intValue; set(v) { _look.intValue = v; p.edit().putInt("look", v).apply() }
     var night: Boolean get() = _night.value; set(v) { _night.value = v; p.edit().putBoolean("night", v).apply() }
@@ -85,6 +87,15 @@ class Prefs private constructor(ctx: Context) {
     var mornM: Int get() = _mornM.intValue; set(v) { _mornM.intValue = v; p.edit().putInt("mornM", v).apply() }
     var shake: Boolean get() = _shake.value; set(v) { _shake.value = v; p.edit().putBoolean("shake", v).apply() }
 
+    /** how many times today's question has been swapped; 0 on a new day */
+    val promptShift: Int get() = if (_promptDay.value == java.time.LocalDate.now().toString()) _promptShift.intValue else 0
+    fun nextPrompt() {
+        val today = java.time.LocalDate.now().toString()
+        val n = promptShift + 1
+        _promptDay.value = today; _promptShift.intValue = n
+        p.edit().putString("promptDay", today).putInt("promptShift", n).apply()
+    }
+
     val active: Look get() = Looks.all[if (night) 3 else look.coerceIn(0, 2)]
 
     companion object {