Fixes time formatter & adds test

The timestamps can apparently include timezone offsets now, so this adds an optional section for them and fixes fraction of second handling

build.gradle

@@ -44,6 +44,8 @@ dependencies {
 
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.9.0'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.9.0'
+    testImplementation 'org.junit.jupiter:junit-jupiter-params:5.9.0'
+
 }
 
 test {

src/main/java/com/github/khakers/modmailviewer/util/DateFormatters.java

@@ -8,7 +8,10 @@ public class DateFormatters {
     //todo incorrect parsing of nanos
     public static final DateTimeFormatter DATABASE_TIMESTAMP_FORMAT = new DateTimeFormatterBuilder()
             .parseCaseInsensitive()
-            .appendPattern("yyyy-MM-dd HH:mm:ss.nnnnnn")
+            .parseLenient()
+            .appendPattern("yyyy-MM-dd HH:mm:ss.SSSSSS")
+            .optionalStart()
+            .appendPattern("xxx")
             .toFormatter()
             .withZone(ZoneId.of("UTC"));
 

src/test/java/com/github/khakers/modmailviewer/util/DateFormattersTest.java

@@ -0,0 +1,20 @@
+package com.github.khakers.modmailviewer.util;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import java.time.Instant;
+
+class DateFormattersTest {
+
+    @ParameterizedTest
+    @ValueSource(strings = { "2022-11-08 07:14:55.624724", "2022-11-09 03:51:31.687000+00:00", "2022-11-09 03:43:26.171000+00:00", "2022-11-08 05:30:50.694581" })
+    void testTimeParsing(String timestamp) {
+        var time = DateFormatters.DATABASE_TIMESTAMP_FORMAT.parse(timestamp, Instant::from);
+        System.out.println("------");
+        System.out.println(timestamp);
+        System.out.println(time.toString());
+        System.out.println(DateFormatters.DATABASE_TIMESTAMP_FORMAT.format(time));
+    }
+
+}