12: Add grace period support for persistent alarms

src/main/tjava/com/r35157/jupiterperpsalarm/impl/ref/AlarmConfigurationParser.tjava

@@ -13,6 +13,7 @@ public final class AlarmConfigurationParser {
     public static List<PriceAlarmDefinition> parse(Path path) throws IOException {
         List<String> lines = Files.readAllLines(path);
         List<PriceAlarmDefinition> alarms = new ArrayList<>();
+        Map<String, String> constants = new LinkedHashMap<>();
 
         for (int lineNumber = 1; lineNumber <= lines.size(); lineNumber++) {
             String line = lines.get(lineNumber - 1);
@@ -59,8 +60,8 @@ public final class AlarmConfigurationParser {
 
         BigDecimal target = parseTarget(cursor.nextToken("target"));
 
-        AlarmTrigger trigger = AlarmTrigger.valueOf(
+        TriggerConfiguration triggerConfiguration = parseTrigger(
-                cursor.nextToken("trigger").toUpperCase(Locale.ROOT)
+                cursor.nextToken("trigger")
         );
 
         AlarmSeverity severity = AlarmSeverity.valueOf(
@@ -81,7 +82,8 @@ public final class AlarmConfigurationParser {
                 asset,
                 direction,
                 target,
-                trigger,
+                triggerConfiguration.trigger(),
+                triggerConfiguration.gracePeriod(),
                 severity,
                 note
         );
@@ -109,6 +111,50 @@ public final class AlarmConfigurationParser {
         return target;
     }
 
+    private static TriggerConfiguration parseTrigger(String triggerText) {
+        String normalized = triggerText.toUpperCase(Locale.ROOT);
+
+        if (normalized.equals("ONETIME")) {
+            return new TriggerConfiguration(AlarmTrigger.ONETIME, 0);
+        }
+
+        if (normalized.equals("PERSISTENT")) {
+            return new TriggerConfiguration(AlarmTrigger.PERSISTENT, 0);
+        }
+
+        if (normalized.startsWith("PERSISTENT:")) {
+            String graceText = normalized.substring("PERSISTENT:".length());
+
+            if (graceText.isEmpty()) {
+                throw new IllegalArgumentException("Missing persistent grace period: " + triggerText);
+            }
+
+            ΩsecondsΩ gracePeriodSeconds;
+            try {
+                gracePeriodSeconds = Integer.parseInt(graceText);
+            } catch (NumberFormatException exception) {
+                throw new IllegalArgumentException(
+                        "Invalid persistent grace period: " + triggerText,
+                        exception
+                );
+            }
+
+            if (gracePeriodSeconds < 0) {
+                throw new IllegalArgumentException(
+                        "Persistent grace period cannot be negative: " + triggerText
+                );
+            }
+
+            return new TriggerConfiguration(AlarmTrigger.PERSISTENT, gracePeriodSeconds);
+        }
+
+        if (normalized.startsWith("ONETIME:")) {
+            throw new IllegalArgumentException("ONETIME cannot have a grace period: " + triggerText);
+        }
+
+        throw new IllegalArgumentException("Unknown trigger: " + triggerText);
+    }
+
     private static void validateTarget(BigDecimal target, String originalTargetStr) {
         if (target.compareTo(BigDecimal.ZERO) < 0) {
             throw new IllegalArgumentException(
@@ -274,8 +320,12 @@ public final class AlarmConfigurationParser {
         }
     }
 
-    private AlarmConfigurationParser() {
+    private record TriggerConfiguration(
+            AlarmTrigger trigger,
+            ΩsecondsΩ gracePeriod
+    ) {
     }
 
-    private static Map<String, String> constants = new LinkedHashMap<>();
+    private AlarmConfigurationParser() {
+    }
 }

src/main/tjava/com/r35157/jupiterperpsalarm/impl/ref/PriceAlarm.tjava

@@ -1,5 +1,7 @@
 package com.r35157.jupiterperpsalarm.impl.ref;
 
+import java.time.Instant;
+
 public final class PriceAlarm {
 
     public PriceAlarm(PriceAlarmDefinition definition, AlarmAction action) {
@@ -25,16 +27,28 @@ public final class PriceAlarm {
 
         previousReached = reached;
 
-        if (!enteredTriggeredSide) {
+        if (!reached) {
+            previousReached = false;
             return;
         }
 
-        if (definition.trigger() == AlarmTrigger.ONETIME && triggerCount > 0) {
+        if (definition.trigger() == AlarmTrigger.ONETIME) {
+            if (!enteredTriggeredSide || triggerCount > 0) {
                 return;
             }
 
-        triggerCount++;
+            trigger(price);
-        action.trigger(price, definition);
+            return;
+        }
+
+        if (definition.trigger() == AlarmTrigger.PERSISTENT) {
+            if (lastTriggeredAt == null || persistentGracePeriodHasPassed()) {
+                trigger(price);
+            }
+            return;
+        }
+
+        throw new IllegalStateException("Unsupported alarm trigger: " + definition.trigger());
     }
 
     public PriceAlarmDefinition definition() {
@@ -45,9 +59,32 @@ public final class PriceAlarm {
         return triggerCount;
     }
 
+    private boolean persistentGracePeriodHasPassed() {
+        if (lastTriggeredAt == null) {
+            return true;
+        }
+
+        ΩsecondsΩ gracePeriod = definition.triggerGracePeriod();
+
+        if (gracePeriod == 0) {
+            return true;
+        }
+
+        return !Instant.now().isBefore(
+                lastTriggeredAt.plusSeconds(gracePeriod)
+        );
+    }
+
+    private void trigger(OraclePrice price) {
+        triggerCount++;
+        lastTriggeredAt = Instant.now();
+        action.trigger(price, definition);
+    }
+
     private final PriceAlarmDefinition definition;
     private final AlarmAction action;
 
+    private Instant lastTriggeredAt;
     private Boolean previousReached;
     private long triggerCount;
 }

src/main/tjava/com/r35157/jupiterperpsalarm/impl/ref/PriceAlarmDefinition.tjava

@@ -11,6 +11,7 @@ public record PriceAlarmDefinition(
         PriceDirection direction,
         BigDecimal target,
         AlarmTrigger trigger,
+        ΩsecondsΩ triggerGracePeriod,
         AlarmSeverity severity,
         String note
 ) {
@@ -24,5 +25,11 @@ public record PriceAlarmDefinition(
         if (target.signum() < 0) {
             throw new IllegalArgumentException("Target price cannot be negative (was: " + target.signum() + ")!");
         }
+
+        if (triggerGracePeriod < 0) {
+            throw new IllegalArgumentException(
+                    "Trigger grace period cannot be negative: " + triggerGracePeriod
+            );
+        }
     }
 }

src/main/tjava/com/r35157/jupiterperpsalarm/impl/ref/TriggerConfiguration.java

@@ -0,0 +1,2 @@
+package com.r35157.jupiterperpsalarm.impl.ref;
+