* luci/libs: more UVL hacking, needs to be rewritten later

2 files changed, 265 insertions, 33 deletions

diff --git a/libs/uvl/luasrc/uvl.lua b/libs/uvl/luasrc/uvl.lua
index 9cbc546da..35e903f20 100644
--- a/libs/uvl/luasrc/uvl.lua
+++ b/libs/uvl/luasrc/uvl.lua
@@ -20,6 +20,8 @@ require("luci.fs")
 require("luci.util")
 require("luci.model.uci")
 require("luci.uvl.datatypes")
+--require("luci.uvl.validation")
+require("luci.uvl.dependencies")
 
 TYPE_SECTION  = 0x01
 TYPE_VARIABLE = 0x02
@@ -27,6 +29,7 @@ TYPE_ENUM     = 0x03
 
 
 local default_schemedir = "/etc/scheme"
+
 local function _assert( condition, fmt, ... )
 	if not condition then
 		return assert( nil, string.format( fmt, ... ) )
@@ -41,29 +44,73 @@ function UVL.__init__( self, schemedir )
 
 	self.schemedir	= schemedir or default_schemedir
 	self.packages	= { }
+	self.beenthere  = { }
 	self.uci		= luci.model.uci
 	self.datatypes  = luci.uvl.datatypes
 end
 
+
+function UVL._scheme_section( self, uci, c, s )
+	if self.packages[c] and uci[s] then
+		return self.packages[c].sections[uci[s][".type"]]
+	end
+end
+
+function UVL._scheme_option( self, uci, c, s, o )
+	if self.packages[c] and uci[s] and uci[s][o] then
+		return self.packages[c].variables[uci[s][".type"]][o]
+	elseif self.packages[c] and self.packages[c].variables[s] then
+		return self.packages[c].variables[s][o]
+	end
+end
+
+function UVL._keys( self, tbl )
+	local keys = { }
+	if tbl then
+		for k, _ in luci.util.kspairs(tbl) do
+			table.insert( keys, k )
+		end
+	end
+	return keys
+end
+
+
 --- Validate given configuration.
 -- @param config	Name of the configuration to validate
 -- @param scheme	Scheme to validate against (optional)
 -- @return			Boolean indicating weather the given config validates
 -- @return			String containing the reason for errors (if any)
-function UVL.validate( self, config, scheme )
+function UVL.validate( self, config )
 
-	if not scheme then
-		return false, "No scheme found"
-	end
+	self.uci.set_confdir( self.uci.confdir_default )
+	self.uci.load( config )
 
-	for k, v in pairs( config ) do
-		local ok, err = self:validate_section( config, k, scheme )
+	local co = self.uci.get_all( config )
 
-		if not ok then
-			return ok, err
+	local function _uci_foreach( type, func )
+		for k, v in pairs(co) do
+			if co[k]['.type'] == type then
+				func( k, v )
+			end
 		end
 	end
 
+	luci.util.dumptable(co)
+
+
+
+	for k, v in pairs( self.packages[config].sections ) do
+		_uci_foreach( k,
+			function(s)
+				local ok, err = self:validate_section( config, s, co )
+
+				if not ok then
+					return ok, err
+				end
+			end
+		)
+	end
+
 	return true, nil
 end
 
@@ -73,18 +120,50 @@ end
 -- @param scheme	Scheme to validate against
 -- @return			Boolean indicating weather the given config validates
 -- @return			String containing the reason for errors (if any)
-function UVL.validate_section( self, config, section, scheme )
+function UVL.validate_section( self, config, section, co, nodeps )
 
-	if not scheme then
-		return false, "No scheme found"
+	if not co then
+		self.uci.set_confdir( self.uci.confdir_default )
+		self.uci.load( config )
+		co = uci.get_all( config )
 	end
 
-	for k, v in pairs( config[section] ) do
-		local ok, err = self:validate_option( config, section, k, scheme )
+	local cs     = co[section]
+	local scheme = self:_scheme_section( co, config, section )
+
+	if cs then
+		--luci.util.dumptable(cs)
 
-		if not ok then
-			return ok, err
+
+		for k, v in pairs(self.packages[config].variables[cs[".type"]]) do
+			if k:sub(1,1) ~= "." then
+				local ok, err = self:validate_option( config, section, k, co, false, cs[".type"] )
+
+				if not ok then
+					print("ERR", err)
+					return ok, err
+				end
+			end
 		end
+
+		--local dep_ok = nodeps or luci.uvl.dependencies.check_dependency( self, co, config, section )
+		--print( "DEP: ", dep_ok )
+
+		--print( "Validate section: ", config .. '.' .. section, nodeps and '(without depencies)' or '' )
+
+		local ok, err = luci.uvl.dependencies.check_dependency(
+			self, co, config, section, nil, true, cs[".type"]
+		)
+
+		if ok then
+			--print("Validated section!\n\n")
+			return true
+		else
+			print("ERR", "All possible dependencies failed. (Last error was: " .. err .. ")")
+			return false, "All possible dependencies failed"
+		end
+	else
+		print( "Error, scheme section '" .. section .. "' not found in data" )
 	end
 
 	return true, nil
@@ -97,36 +176,59 @@ end
 -- @param scheme	Scheme to validate against
 -- @return			Boolean indicating weather the given config validates
 -- @return			String containing the reason for errors (if any)
-function UVL.validate_option( self, config, section, option, scheme )
+function UVL.validate_option( self, config, section, option, co, nodeps, section2 )
 
-	if type(config) == "string" then
-		config = { ["variables"] = { [section] = { [option] = config } } }
+	if not co then
+		self.uci.set_confdir( self.uci.confdir_default )
+		self.uci.load( config )
+		co = uci.get_all( config )
 	end
 
-	if not scheme then
-		return false, "No scheme found"
-	end
+	local cs = co[section]
+	local sv = self:_scheme_option( co, config, section, option ) or
+		self:_scheme_option( co, config, section2, option )
+
+	--print("VOPT", config, section, option )
 
-	local sv = scheme.variables[section]
-	if not sv then return false, "Requested section not found in scheme" end
+	if not sv then
+		return false, "Requested option '" ..
+			config .. '.' .. ( section or section2 ) .. '.' .. option ..
+			"' not found in scheme"
+	end
 
-	sv = sv[option]
-	if not sv then return false, "Requested option not found in scheme" end
+	if sv.required and not cs[option] then
+		return false, "Mandatory variable '" ..
+			config .. '.' .. section .. '.' .. option ..
+			"' doesn't have a value"
+	end
 
-	if not ( config[section] and config[section][option] ) and sv.required then
-		return false, "Mandatory variable doesn't have a value"
+	if sv.type == "enum" and cs[option] then
+		if not sv.values or not sv.values[cs[option]] then
+			return false, "Value '" .. ( cs[option] or '<nil>' ) .. "' of given option '" ..
+				config .. "." .. section .. "." .. option ..
+				"' is not defined in enum { " ..
+				table.concat(self:_keys(sv.values),", ") .. " }"
+		end
 	end
 
-	if sv.type then
-		if self.datatypes[sv.type] then
-			if not self.datatypes[sv.type]( config[section][option] ) then
-				return false, "Value of given option doesn't validate"
+	if sv.datatype and cs[option] then
+		if self.datatypes[sv.datatype] then
+			if not self.datatypes[sv.datatype]( cs[option] ) then
+				return false, "Value '" .. ( cs[option] or '<nil>' ) .. "' of given option '" ..
+					config .. "." .. ( section or section2 ) .. "." .. option ..
+					"' doesn't validate as datatype '" .. sv.datatype .. "'"
 			end
 		else
-			return false, "Unknown datatype '" .. sv.type .. "' encountered"
+			return false, "Unknown datatype '" .. sv.datatype .. "' encountered"
 		end
 	end
 
+	if not nodeps then
+		return luci.uvl.dependencies.check_dependency(
+			self, co, config, section, option, nil, section2
+		)
+	end
+
 	return true, nil
 end
 
@@ -238,7 +340,7 @@ function UVL._read_scheme_parts( self, scheme, schemes )
 		for k, v in pairs( conf ) do
 			if v['.type'] == "variable" then
 
-				_req( TYPE_VARIABLE, v, { "name", "type", "section" } )
+				_req( TYPE_VARIABLE, v, { "name", "section" } )
 
 				local r = _ref( TYPE_VARIABLE, v )
 
diff --git a/libs/uvl/luasrc/uvl/dependencies.lua b/libs/uvl/luasrc/uvl/dependencies.lua
new file mode 100644
index 000000000..b8d728657
--- /dev/null
+++ b/libs/uvl/luasrc/uvl/dependencies.lua
@@ -0,0 +1,130 @@
+--[[
+
+UCI Validation Layer - Main Library
+(c) 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
+(c) 2008 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+
+]]--
+
+module( "luci.uvl.dependencies", package.seeall )
+
+local function _assert( condition, fmt, ... )
+	if not condition then
+		return assert( nil, string.format( fmt, ... ) )
+	else
+		return condition
+	end
+end
+
+
+function _parse_reference( r, c, s, o )
+	local ref  = { }
+	local vars = {
+		config  = c,
+		section = s,
+		option  = o
+	}
+
+	for i, v in ipairs(luci.util.split(r,".")) do
+		table.insert( ref, (v:gsub( "%$(.+)", function(n) return vars[n] end )) )
+	end
+
+	if #ref == 1 and c and s then
+		ref = { c, s, ref[1] }
+	elseif #ref == 2 and c then
+		ref = { c, unpack(ref) }
+	elseif #ref ~= 3 then
+		print("INVALID REFERENCE: "..#ref, c, s, o)
+		ref = nil
+	end
+
+	return ref
+end
+
+function check_dependency( self, uci, conf, sect, optn, nodeps, section2 )
+
+--	print( "Depency check:    ", conf .. '.' .. sect .. ( optn and '.' .. optn or '' ) )
+
+	local key = conf .. '.' .. sect .. ( optn and '.' .. optn or '' )
+	if not self.beenthere[key] then
+		self.beenthere[key] = true
+	else
+		print("CIRCULAR DEPENDENCY!")
+		return false, "Recursive depency detected"
+	end
+
+	-- check for config
+	if not self.packages[conf] then self:read_scheme(conf) end
+	local item = self.packages[conf]
+
+	-- check for section
+	if sect then
+		item = _assert( self:_scheme_section( uci, conf, sect ) or self:_scheme_section( uci, conf, section2 ),
+			"Unknown section '%s' in scheme '%s' requested",
+			sect or '<nil>', conf or '<nil>' )
+
+		-- check for option
+		if optn then
+			item = _assert( self:_scheme_option( uci, conf, sect, optn ) or
+							self:_scheme_option( uci, conf, section2, optn ),
+				"Unknown variable '%s' in scheme '%s', section '%s' requested",
+				optn or '<nil>', conf or '<nil>', sect or '<nil>' )
+		end
+	end
+
+	if item.depends then
+		local ok = false
+		local valid, err
+
+		for _, dep in ipairs(item.depends) do
+			--print("DEP:",luci.util.serialize_data(dep))
+
+			local subcondition = true
+
+			for k, v in pairs(dep) do
+				-- XXX: better error
+				local ref = _assert( _parse_reference(k,conf,sect,optn),
+					"Ambiguous dependency reference '" .. k .. "' given" )
+
+				-- XXX: true -> nodeps
+				valid, err = self:validate_option(ref[1], ref[2], ref[3], uci, true, section2)
+				if valid then
+					--print("CHK:",uci[ref[2]][ref[3]],v,unpack(ref))
+					if not (
+						( type(v) == "boolean" and uci[ref[2]][ref[3]] ) or
+						( ref[3] and uci[ref[2]][ref[3]] ) == v
+					) then
+						subcondition = false
+						err = type(v) ~= "boolean"
+							and "Option '" .. table.concat( ref, "." ) .. "' doesn't match requested type '" .. v .. '"'
+							or  "Option '" .. table.concat( ref, "." ) .. "' has no value"
+
+						break
+					end
+				else
+					subcondition = false
+					break
+				end
+			end
+
+			if subcondition then
+--				print( " -> Success (condition matched)\n" )
+				return true
+			end
+		end
+
+--		print( " -> Failed\n" )
+		return false, err
+	end
+
+--	print( " -> Success (no depends)\n" )
+	return true
+end