Initial project commit

lib/nightscout/com/eveningoutpost/dexdrip/G5Model/DexSessionKeeper.java

@@ -0,0 +1,52 @@
+package com.eveningoutpost.dexdrip.G5Model;
+
+import com.eveningoutpost.dexdrip.Models.JoH;
+import com.eveningoutpost.dexdrip.UtilityModels.Constants;
+import com.eveningoutpost.dexdrip.UtilityModels.PersistentStore;
+
+// jamorham
+
+// track active session time
+
+public class DexSessionKeeper {
+
+    private static final String PREF_SESSION_START = "OB1-SESSION-START";
+    private static final long WARMUP_PERIOD = Constants.HOUR_IN_MS * 2;
+
+    public static void clearStart() {
+        PersistentStore.setLong(PREF_SESSION_START, 0);
+    }
+
+    public static void setStart(long when) {
+        // TODO sanity check
+        PersistentStore.setLong(PREF_SESSION_START, when);
+    }
+
+    public static long getStart() {
+        // value 0 == not started
+        return PersistentStore.getLong(PREF_SESSION_START);
+    }
+
+    public static boolean isStarted() {
+        return getStart() != 0;
+    }
+
+    public static String prettyTime() {
+        if (isStarted()) {
+            final long elapsed = JoH.msSince(getStart());
+            if (elapsed < WARMUP_PERIOD) {
+                return JoH.niceTimeScalar((double) WARMUP_PERIOD - elapsed, 1);
+            } else {
+                return JoH.niceTimeScalar((double) elapsed, 1);
+            }
+        } else {
+            return "";
+        }
+    }
+
+    // check for mismatch between sensor state currency and transmitter time
+    public static boolean warmUpTimeValid() {
+        return (isStarted() && (JoH.msSince(getStart()) <= WARMUP_PERIOD));
+    }
+
+}