From a7163d46a6414c38c3eb4ba1e6783b3c158312db Mon Sep 17 00:00:00 2001
From: 2xsaiko
Date: Thu, 4 Jun 2020 10:10:53 +0200
Subject: Move ServerAddress to enigma-server

---
 .../java/cuchaz/enigma/network/ServerAddress.java  | 78 ++++++++++++++++++++++
 .../cuchaz/enigma/network/ServerAddressTest.java   | 28 ++++++++
 2 files changed, 106 insertions(+)
 create mode 100644 enigma-server/src/main/java/cuchaz/enigma/network/ServerAddress.java
 create mode 100644 enigma-server/src/test/java/cuchaz/enigma/network/ServerAddressTest.java

(limited to 'enigma-server/src')

diff --git a/enigma-server/src/main/java/cuchaz/enigma/network/ServerAddress.java b/enigma-server/src/main/java/cuchaz/enigma/network/ServerAddress.java
new file mode 100644
index 0000000..45e0750
--- /dev/null
+++ b/enigma-server/src/main/java/cuchaz/enigma/network/ServerAddress.java
@@ -0,0 +1,78 @@
+package cuchaz.enigma.network;
+
+import java.util.Objects;
+
+import javax.annotation.Nullable;
+
+public class ServerAddress {
+
+	public final String address;
+	public final int port;
+
+	private ServerAddress(String address, int port) {
+		this.address = address;
+		this.port = port;
+	}
+
+	@Nullable
+	public static ServerAddress of(String address, int port) {
+		if (port < 0 || port > 65535) return null;
+		if (address == null) return null;
+		if (address.equals("")) return null;
+		if (!address.matches("[a-zA-Z0-9.:-]+")) return null;
+		if (address.startsWith("-") || address.endsWith("-")) return null;
+		return new ServerAddress(address, port);
+	}
+
+	@Nullable
+	public static ServerAddress from(String s, int defaultPort) {
+		String address;
+		int idx = s.indexOf(']');
+		if (s.startsWith("[") && idx != -1) {
+			address = s.substring(1, idx);
+			s = s.substring(idx + 1);
+		} else if (s.chars().filter(c -> c == ':').count() == 1) {
+			idx = s.indexOf(':');
+			address = s.substring(0, idx);
+			s = s.substring(idx);
+		} else {
+			address = s;
+			s = "";
+		}
+
+		int port;
+		if (s.isEmpty()) {
+			port = defaultPort;
+		} else if (s.startsWith(":")) {
+			s = s.substring(1);
+			try {
+				port = Integer.parseInt(s);
+			} catch (NumberFormatException e) {
+				return null;
+			}
+		} else {
+			return null;
+		}
+		return ServerAddress.of(address, port);
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) return true;
+		if (o == null || getClass() != o.getClass()) return false;
+		ServerAddress that = (ServerAddress) o;
+		return port == that.port &&
+				Objects.equals(address, that.address);
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hash(address, port);
+	}
+
+	@Override
+	public String toString() {
+		return String.format("ServerAddress { address: '%s', port: %d }", address, port);
+	}
+
+}
diff --git a/enigma-server/src/test/java/cuchaz/enigma/network/ServerAddressTest.java b/enigma-server/src/test/java/cuchaz/enigma/network/ServerAddressTest.java
new file mode 100644
index 0000000..3765f7a
--- /dev/null
+++ b/enigma-server/src/test/java/cuchaz/enigma/network/ServerAddressTest.java
@@ -0,0 +1,28 @@
+package cuchaz.enigma.network;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+public class ServerAddressTest {
+
+	@Test
+	public void validAddresses() {
+		assertEquals(ServerAddress.of("127.0.0.1", 22), ServerAddress.from("127.0.0.1", 22));
+		assertEquals(ServerAddress.of("::1", 80), ServerAddress.from("[::1]:80", 22));
+		assertEquals(ServerAddress.of("dblsaiko.net", 22), ServerAddress.from("dblsaiko.net", 22));
+		assertEquals(ServerAddress.of("f00f:efee::127.0.0.1", 724), ServerAddress.from("[f00f:efee::127.0.0.1]:724", 22));
+		assertEquals(ServerAddress.of("aaaa:aaaa:aaaa:aaaa:aaaa:aaaa:aaaa:70", 22), ServerAddress.from("aaaa:aaaa:aaaa:aaaa:aaaa:aaaa:aaaa:70", 22));
+		assertEquals(ServerAddress.of("::1", 22), ServerAddress.from("::1", 22));
+		assertEquals(ServerAddress.of("0", 22), ServerAddress.from("0", 22));
+	}
+
+	@Test
+	public void invalidAddresses() {
+		assertNull(ServerAddress.from("127.0.0.1:-72", 22));
+		assertNull(ServerAddress.from("127.0.0.1:100000000", 22));
+		assertNull(ServerAddress.from("127.0.0.1:lmao", 22));
+	}
+
+}
-- 
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