replication: add raw plugin that just passes bytes over

This plugin does no processing and just passing the information through.

Signed-off-by: Petros Angelatos <petrosagg@gmail.com>

Author: petrosagg

postgres-protocol/src/replication/mod.rs

@@ -2,6 +2,10 @@ use std::collections::HashMap;
 
 use crate::message::backend::Parse;
 
+pub mod raw;
+
+pub use raw::Raw;
+
 pub trait DecodingPlugin {
     type Message: Parse;
 

postgres-protocol/src/replication/raw.rs

@@ -0,0 +1,28 @@
+use std::collections::HashMap;
+
+use bytes::Bytes;
+
+use crate::replication::DecodingPlugin;
+
+pub struct Raw {
+    name: String,
+    options: HashMap<String, String>,
+}
+
+impl Raw {
+    pub fn new(name: String, options: HashMap<String, String>) -> Self {
+        Self { name, options }
+    }
+}
+
+impl DecodingPlugin for Raw {
+    type Message = Bytes;
+
+    fn name(&self) -> &str {
+        &self.name
+    }
+
+    fn options(&self) -> HashMap<String, String> {
+        self.options.clone()
+    }
+}