From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 27 Jun 2020 22:33:55 +0000 (+0100)
Subject: proposed protocol?
X-Git-Tag: otter-0.2.0~1520
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=64ee69467847aa339a89e161fbd28608c4214d2c;p=otter.git

proposed protocol?
---

diff --git a/NOTES b/NOTES
new file mode 100644
index 00000000..8bacd564
--- /dev/null
+++ b/NOTES
@@ -0,0 +1,62 @@
+protocol
+
+
+all in context of a piece
+
+
+ client				server
+
+        <-------------------
+	some update
+		piece
+		gen
+		your doing ?
+
+at start of op
+ note picee.gen = gen
+
+ grab, or move, or something:
+ 	------------------->
+	grab/move/ungrab
+		piece
+		piece.gen
+					if piece.gen == msg.piece.gen
+					then set piece.last_client
+
+					if piece.last_client == client
+					then ok
+
+					otherwise bad
+					send nothing!  a message
+					must be in the queue already!
+
+        <-------------------
+	soem update
+		piece
+		gen
+		your doing ?
+
+if "your doing"
+ignore the message, we are up to date,
+but set the piece's gen
+
+otherwise
+cancel any drag for the piece
+reset the piece state to that specified
+
+
+--------------------------------------------------
+
+client maintains
+	for each piece
+		[ game state ]
+		gen (last from server)
+		x, y, held
+	overall
+		[ ui state ]
+		what are we dragging, drag start, click state, etc.
+
+server maintains
+	for each piece
+		gen
+	client list etc.