mudgangster

commit c36561bf6995c945960318640ac733caa0cfbbe2
parent bb745abb48f995f607edcc8a0d9a5d071bfcd671
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Fri, 17 Oct 2014 09:29:03 +0100

Add mud.intercept

Diffstat:
handlers.lua
 | 
3
+++
intercept.lua
 | 
43
+++++++++++++++++++++++++++++++++++++++++++

2 files changed, 46 insertions(+), 0 deletions(-)
diff --git a/handlers.lua b/handlers.lua
@@ -1,5 +1,6 @@
 local action = require( "action" )
 local alias = require( "alias" )
+local intercept = require( "intercept" )
 local gag = require( "gag" )
 local macro = require( "macro" )
 local sub = require( "sub" )
@@ -216,6 +217,8 @@ local function handleCommand( input, hide )
 			return
 		end
 
+		intercept.doIntercept( input )
+
 		if not hide and input ~= "" then
 			local toShow = ( showInput and input or ( "*" ):rep( input:len() ) ) .. "\n"
 
diff --git a/intercept.lua b/intercept.lua
@@ -0,0 +1,43 @@
+local Intercepts = { }
+
+local function doIntercept( command )
+	for i = 1, #Intercepts do
+		local intercept = Intercepts[ i ]
+
+		if intercept.enabled then
+			local ok, err = pcall( string.gsub, command, intercept.pattern, intercept.callback )
+
+			if not ok then
+				mud.print( debug.traceback( "\n#s> intercept callback failed: %s" % err ) )
+			end
+		end
+	end
+end
+
+function mud.intercept( pattern, callback, disabled )
+	enforce( pattern, "pattern", "string" )
+	enforce( callback, "callback", "function" )
+	enforce( disabled, "disabled", "boolean", "nil" )
+
+	local intercept = {
+		pattern = pattern,
+		callback = callback,
+
+		enabled = not disabled,
+
+		enable = function( self )
+			self.enabled = true
+		end,
+		disable = function( self )
+			self.enabled = false
+		end,
+	}
+	
+	table.insert( Intercepts, intercept )
+
+	return intercept
+end
+
+return {
+	doIntercept = doIntercept,
+}