From 4eedb599d8de5559daa4678c7520bb36968e767e Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Sat, 28 Jan 2023 21:24:11 +0100
Subject: Server to client: diffs

---
 whiteboard.cpp | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

(limited to 'whiteboard.cpp')

diff --git a/whiteboard.cpp b/whiteboard.cpp
index 059571d..35ae30b 100644
--- a/whiteboard.cpp
+++ b/whiteboard.cpp
@@ -83,33 +83,39 @@ void Whiteboard::storage_cleanup()
  }
 }
 
-std::string make_xml(const std::initializer_list<std::pair<std::string, std::string>>& key_values)
+pt::ptree make_ptree(const std::initializer_list<std::pair<std::string, std::string>>& key_values)
 {
- pt::ptree xml;
+ pt::ptree ptree;
  for (const auto& i: key_values) {
-  xml.put(fmt::format("serverinfo.{}", i.first), i.second);
+  ptree.put(fmt::format("serverinfo.{}", i.first), i.second);
  }
 
- return Reichwein::XML::plain_xml(xml);
+ return ptree;
+}
+
+std::string make_xml(const std::initializer_list<std::pair<std::string, std::string>>& key_values)
+{
+ pt::ptree ptree{make_ptree(key_values)};
+ return Reichwein::XML::plain_xml(ptree);
 }
 
-void Whiteboard::notify_other_connections_file(Whiteboard::connection& c, const std::string& id)
+void Whiteboard::notify_other_connections_diff(Whiteboard::connection& c, const std::string& id, const Diff& diff)
 {
  std::for_each(m_registry.begin(id), m_registry.end(id), [&](const Whiteboard::connection& ci)
                {
                 if (c != ci) {
                  boost::beast::flat_buffer buffer;
-                 boost::beast::ostream(buffer) << make_xml({
-                   {"type", "getfile"},
-                   {"data", m_storage->getDocument(id)},
-                   {"revision", std::to_string(m_storage->getRevision(id)) },
-                   {"pos", std::to_string(m_storage->getCursorPos(id)) }
-                   });
+                 pt::ptree ptree {make_ptree({
+                   {"type", "getdiff"},
+                   {"revision", std::to_string(m_storage->getRevision(id)) }
+                   })};
+                 ptree.put_child("serverinfo.diff", diff.get_structure().get_child("diff"));
+                 boost::beast::ostream(buffer) << Reichwein::XML::plain_xml(ptree);
                  std::lock_guard<std::mutex> lock(m_websocket_mutex);
                  try {
                   ci->write(buffer.data());
                  } catch (const std::exception& ex) {
-                  std::cerr << "Warning: Notify getfile write for " << ci << " not possible, id " << id << std::endl;
+                  std::cerr << "Warning: Notify getdiff write for " << ci << " not possible, id " << id << std::endl;
                   m_registry.dump();
                  }
                 }
@@ -165,7 +171,7 @@ std::string Whiteboard::handle_request(Whiteboard::connection& c, const std::str
 
    m_storage->setDocument(id, data);
    m_registry.setId(c, id);
-   notify_other_connections_file(c, id);
+   notify_other_connections_diff(c, id, d);
    
    int pos {xml.get<int>("request.pos")};
    if (m_storage->getCursorPos(id) != pos) {
-- 
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