From fb6cd9ca585c4194a5b88053f6861151919c02df Mon Sep 17 00:00:00 2001
From: Claudius 'keldu' Holeksa <mail@keldu.de>
Date: Wed, 14 Aug 2024 14:24:20 +0200
Subject: wip

---
 modules/remote-filesystem/c++/transfer.hpp | 53 +++++++++++++++++++++++++++---
 1 file changed, 49 insertions(+), 4 deletions(-)

(limited to 'modules/remote-filesystem/c++/transfer.hpp')

diff --git a/modules/remote-filesystem/c++/transfer.hpp b/modules/remote-filesystem/c++/transfer.hpp
index e3df023..1e42cf5 100644
--- a/modules/remote-filesystem/c++/transfer.hpp
+++ b/modules/remote-filesystem/c++/transfer.hpp
@@ -2,14 +2,21 @@
 
 #include "remote.hpp"
 
+#include <forstio/buffer.hpp>
 #include <forstio/remote/transfer.hpp>
 
+#include <fstream>
+
 namespace saw {
 template<typename Schema, typename Encoding>
 class data_server<Schema, Encoding, rmt::File> final : public i_data_server<rmt::File> {
 private:
 	ptr<remote<rmt::File>> remote_;
 	remote_address<rmt::File> addr_;
+
+	static error generate_invalid_id_error() {
+		return make_error<err::invalid_state>("rmt::File data_server only supports Id 0.");
+	}
 public:
 	static constexpr std::pair<uint32_t,uint32_t> class_id{schema_hash<Schema>::apply(), schema_hash<Encoding>::apply()};
 
@@ -29,21 +36,59 @@ public:
 		return class_id;
 	}
 
-	error_or<void> send(const data<Schema, Encoding>& dat, id<Schema> store_id){
-		return make_error<err::not_implemented>();
+	error_or<void> send(data<Schema, Encoding>& dat, id<Schema> store_id){
+		if(store_id.get_value() > 0u){
+			return generate_invalid_id_error();
+		}
+
+		std::basic_fstream<uint8_t> s{addr_.get_path(), s.binary | s.out};
+		if(!s.is_open()){
+			return make_error<err::not_found>("Couldn't open file");
+		}
+
+		auto& buff = dat.get_buffer();
+		buffer_view buff_v{buff};
+		while(buff_v.read_segment_length() > 0u){
+			s.write(&buff_v.read(), buff_v.read_segment_length());
+			
+			buff_v.read_advance(buff_v.read_segment_length());
+		}
+		return make_void();
 	}
 
 	error_or<void> allocate(data<typename meta_schema<Schema>::MetaSchema, Encoding> meta, id<Schema> store_id){
+		if(store_id.get_value() > 0u){
+			return generate_invalid_id_error();
+		}
 		return make_error<err::not_implemented>();
 	}
 
 	error_or<void> erase(id<Schema> store_id){
+		if(store_id.get_value() > 0u){
+			return generate_invalid_id_error();
+		}
 		return make_error<err::not_implemented>();
 	}
 
 	error_or<data<Schema,Encoding>> receive(id<Schema> store_id){
-		return make_error<err::not_implemented>();
-	}
+		if(store_id.get_value() > 0u){
+			return generate_invalid_id_error();
+		}
 
+		data<Schema, Encoding> dat{heap<array_buffer>(1u)};
+		std::basic_fstream<uint8_t> s{addr_.get_path(), s.binary | s.in};
+		if(!s.is_open()){
+			return make_error<err::not_found>("Couldn't open file");
+		}
+		uint8_t ele{};
+		while(s.readsome(&ele, 1u) > 0u){
+			auto err = dat.get_buffer().push(ele);
+			if(err.failed()){
+				return err;
+			}
+		}
+
+		return dat;
+	}
 };
 }
-- 
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