20: Move target price parsing to new AlarmTargetParser class

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

@@ -3,7 +3,6 @@ package com.r35157.jupiterperpsalarm.impl.ref;
 import com.r35157.jupiterperpsalarm.AlarmSeverity;
 
 import java.io.IOException;
-import java.math.BigDecimal;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.*;
@@ -89,28 +88,6 @@ public final class AlarmConfigurationParser {
         );
     }
 
-    private static BigDecimal parseTargetPercentage(
-            String targetStr,
-            int operatorIndex,
-            boolean add
-    ) {
-        BigDecimal base = new BigDecimal(targetStr.substring(0, operatorIndex));
-        String percentStr = targetStr.substring(operatorIndex + 1, targetStr.length() - 1);
-        BigDecimal percent = new BigDecimal(percentStr);
-
-        BigDecimal delta = base
-                .multiply(percent)
-                .divide(BigDecimal.valueOf(100));
-
-        BigDecimal target = add ? base.add(delta) : base.subtract(delta);
-
-        validateTarget(base, targetStr);
-        validateTarget(percent, targetStr);
-        validateTarget(target, targetStr);
-
-        return target;
-    }
-
     private static TriggerConfiguration parseTrigger(String triggerText) {
         String normalized = triggerText.toUpperCase(Locale.ROOT);
 
@@ -155,35 +132,6 @@ public final class AlarmConfigurationParser {
         throw new IllegalArgumentException("Unknown trigger: " + triggerText);
     }
 
-    private static void validateTarget(BigDecimal target, String originalTargetStr) {
-        if (target.compareTo(BigDecimal.ZERO) < 0) {
-            throw new IllegalArgumentException(
-                    "Target must be zero or positive: " + originalTargetStr
-            );
-        }
-    }
-
-    private static BigDecimal parseTarget(String targetStr) {
-        String trimmedTargetStr = targetStr.trim();
-
-        if (trimmedTargetStr.endsWith("%")) {
-            int plusIndex = trimmedTargetStr.indexOf('+');
-            int minusIndex = trimmedTargetStr.indexOf('-', 1);
-
-            if (plusIndex >= 0) {
-                return parseTargetPercentage(trimmedTargetStr, plusIndex, true);
-            }
-
-            if (minusIndex >= 0) {
-                return parseTargetPercentage(trimmedTargetStr, minusIndex, false);
-            }
-        }
-
-        BigDecimal target = new BigDecimal(trimmedTargetStr);
-        validateTarget(target, targetStr);
-        return target;
-    }
-
     private static final class Cursor {
         private Cursor(String line) {
             this.line = line;

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

@@ -0,0 +1,60 @@
+package com.r35157.jupiterperpsalarm.impl.ref;
+
+import java.math.BigDecimal;
+
+public final class AlarmTargetParser {
+
+    private AlarmTargetParser() {
+    }
+
+    public static BigDecimal parse(String targetStr) {
+        String trimmedTargetStr = targetStr.trim();
+
+        if (trimmedTargetStr.endsWith("%")) {
+            int plusIndex = trimmedTargetStr.indexOf('+');
+            int minusIndex = trimmedTargetStr.indexOf('-', 1);
+
+            if (plusIndex >= 0) {
+                return parseTargetPercentage(trimmedTargetStr, plusIndex, true);
+            }
+
+            if (minusIndex >= 0) {
+                return parseTargetPercentage(trimmedTargetStr, minusIndex, false);
+            }
+        }
+
+        BigDecimal target = new BigDecimal(trimmedTargetStr);
+        validateTarget(target, targetStr);
+        return target;
+    }
+
+    private static BigDecimal parseTargetPercentage(
+            String targetStr,
+            int operatorIndex,
+            boolean add
+    ) {
+        BigDecimal base = new BigDecimal(targetStr.substring(0, operatorIndex));
+        String percentStr = targetStr.substring(operatorIndex + 1, targetStr.length() - 1);
+        BigDecimal percent = new BigDecimal(percentStr);
+
+        BigDecimal delta = base
+                .multiply(percent)
+                .divide(BigDecimal.valueOf(100));
+
+        BigDecimal target = add ? base.add(delta) : base.subtract(delta);
+
+        validateTarget(base, targetStr);
+        validateTarget(percent, targetStr);
+        validateTarget(target, targetStr);
+
+        return target;
+    }
+
+    private static void validateTarget(BigDecimal target, String originalTargetStr) {
+        if (target.compareTo(BigDecimal.ZERO) < 0) {
+            throw new IllegalArgumentException(
+                    "Target must be zero or positive: " + originalTargetStr
+            );
+        }
+    }
+}