significant refactors and implement extension negotiations (resolves #17) and EnvWeatherType (resolves #29)

src/packet/client_extended.rs

@@ -0,0 +1,42 @@
+use super::{SafeBufExtension, STRING_LENGTH};
+
+/// extended client packets
+#[derive(Debug, Clone)]
+pub enum ExtendedClientPacket {
+	/// packet containing the client name and the number of extensions it supports
+	ExtInfo {
+		app_name: String,
+		extension_count: i16,
+	},
+	/// packet containing a supported extension name and version
+	ExtEntry { ext_name: String, version: i32 },
+}
+
+impl ExtendedClientPacket {
+	/// gets the size of the packet from the given id (minus one byte for the id)
+	pub const fn get_size_from_id(id: u8) -> Option<usize> {
+		Some(match id {
+			0x10 => STRING_LENGTH + 2,
+			0x11 => STRING_LENGTH + 4,
+			_ => return None,
+		})
+	}
+
+	/// reads the packet
+	pub fn read<B>(id: u8, buf: &mut B) -> Option<Self>
+	where
+		B: SafeBufExtension,
+	{
+		Some(match id {
+			0x10 => Self::ExtInfo {
+				app_name: buf.try_get_string().ok()?,
+				extension_count: buf.try_get_i16().ok()?,
+			},
+			0x11 => Self::ExtEntry {
+				ext_name: buf.try_get_string().ok()?,
+				version: buf.try_get_i32().ok()?,
+			},
+			_ => return None,
+		})
+	}
+}