From 25a33611fdab6eba7cb3625677d37ccd5c16fd7d Mon Sep 17 00:00:00 2001
From: Paul Schaub <vanitasvitae@fsfe.org>
Date: Tue, 31 Oct 2023 15:10:46 +0100
Subject: [PATCH] Kotlin conversion: UTCUtil

---
 sop-java/src/main/java/sop/util/UTCUtil.java | 65 --------------------
 sop-java/src/main/kotlin/sop/util/UTCUtil.kt | 62 +++++++++++++++++++
 2 files changed, 62 insertions(+), 65 deletions(-)
 delete mode 100644 sop-java/src/main/java/sop/util/UTCUtil.java
 create mode 100644 sop-java/src/main/kotlin/sop/util/UTCUtil.kt

diff --git a/sop-java/src/main/java/sop/util/UTCUtil.java b/sop-java/src/main/java/sop/util/UTCUtil.java
deleted file mode 100644
index 96a6b9c..0000000
--- a/sop-java/src/main/java/sop/util/UTCUtil.java
+++ /dev/null
@@ -1,65 +0,0 @@
-// SPDX-FileCopyrightText: 2021 Paul Schaub <vanitasvitae@fsfe.org>
-//
-// SPDX-License-Identifier: Apache-2.0
-
-package sop.util;
-
-import javax.annotation.Nonnull;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.TimeZone;
-
-/**
- * Utility class to parse and format dates as ISO-8601 UTC timestamps.
- */
-public class UTCUtil {
-
-    public static final SimpleDateFormat UTC_FORMATTER = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
-    public static final SimpleDateFormat[] UTC_PARSERS = new SimpleDateFormat[] {
-            UTC_FORMATTER,
-            new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssX"),
-            new SimpleDateFormat("yyyyMMdd'T'HHmmss'Z'"),
-            new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'")
-    };
-
-    static {
-        for (SimpleDateFormat f : UTC_PARSERS) {
-            f.setTimeZone(TimeZone.getTimeZone("UTC"));
-        }
-    }
-    /**
-     * Parse an ISO-8601 UTC timestamp from a string.
-     *
-     * @param dateString string
-     * @return date
-     * @throws ParseException if the date string is malformed and cannot be parsed
-     */
-    @Nonnull
-    public static Date parseUTCDate(String dateString) throws ParseException {
-        ParseException exception = null;
-        for (SimpleDateFormat parser : UTC_PARSERS) {
-            try {
-                return parser.parse(dateString);
-            } catch (ParseException e) {
-                // Store first exception (that of UTC_FORMATTER) to throw if we fail to parse the date
-                if (exception == null) {
-                    exception = e;
-                }
-                // Try next parser
-            }
-        }
-        // No parser worked, so we throw the store exception
-        throw exception;
-    }
-
-    /**
-     * Format a date as ISO-8601 UTC timestamp.
-     *
-     * @param date date
-     * @return timestamp string
-     */
-    public static String formatUTCDate(Date date) {
-        return UTC_FORMATTER.format(date);
-    }
-}
diff --git a/sop-java/src/main/kotlin/sop/util/UTCUtil.kt b/sop-java/src/main/kotlin/sop/util/UTCUtil.kt
new file mode 100644
index 0000000..8924f25
--- /dev/null
+++ b/sop-java/src/main/kotlin/sop/util/UTCUtil.kt
@@ -0,0 +1,62 @@
+// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package sop.util
+
+import java.text.ParseException
+import java.text.SimpleDateFormat
+import java.util.*
+
+class UTCUtil {
+
+    companion object {
+
+        @JvmStatic val UTC_FORMATTER = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'")
+        @JvmStatic
+        val UTC_PARSERS =
+            arrayOf(
+                    UTC_FORMATTER,
+                    SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssX"),
+                    SimpleDateFormat("yyyyMMdd'T'HHmmss'Z'"),
+                    SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'"))
+                .onEach { fmt -> fmt.timeZone = TimeZone.getTimeZone("UTC") }
+
+        /**
+         * Parse an ISO-8601 UTC timestamp from a string.
+         *
+         * @param dateString string
+         * @return date
+         * @throws ParseException if the date string is malformed and cannot be parsed
+         */
+        @JvmStatic
+        @Throws(ParseException::class)
+        fun parseUTCDate(dateString: String): Date {
+            var exception: ParseException? = null
+            for (parser in UTC_PARSERS) {
+                try {
+                    return parser.parse(dateString)
+                } catch (e: ParseException) {
+                    // Store first exception (that of UTC_FORMATTER) to throw if we fail to parse
+                    // the date
+                    if (exception == null) {
+                        exception = e
+                    }
+                    // Try next parser
+                }
+            }
+            throw exception!!
+        }
+
+        /**
+         * Format a date as ISO-8601 UTC timestamp.
+         *
+         * @param date date
+         * @return timestamp string
+         */
+        @JvmStatic
+        fun formatUTCDate(date: Date): String {
+            return UTC_FORMATTER.format(date)
+        }
+    }
+}