3 UCI Validation Layer - Main Library
4 (c) 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
5 (c) 2008 Steven Barth <steven@midlink.org>
7 Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
11 http://www.apache.org/licenses/LICENSE-2.0
18 --- UVL - UCI Validation Layer
22 module( "luci.uvl", package.seeall )
26 require("luci.model.uci")
27 require("luci.uvl.errors")
28 require("luci.uvl.datatypes")
29 require("luci.uvl.validation")
30 require("luci.uvl.dependencies")
39 --- Boolean; default true;
40 -- treat sections found in config but not in scheme as error
41 STRICT_UNKNOWN_SECTIONS = true
43 --- Boolean; default true;
44 -- treat options found in config but not in scheme as error
45 STRICT_UNKNOWN_OPTIONS = true
47 --- Boolean; default true;
48 -- treat failed external validators as error
49 STRICT_EXTERNAL_VALIDATORS = true
51 --- Boolean; default true;
52 -- treat list values stored as options like errors
53 STRICT_LIST_TYPE = true
56 local default_schemedir = "/lib/uci/schema"
57 local default_savedir = "/tmp/.uvl"
58 local ERR = luci.uvl.errors
61 --- Object constructor
64 -- @param schemedir Path to the scheme directory (optional)
65 -- @return Instance object
66 UVL = luci.util.class()
68 function UVL.__init__( self, schemedir )
69 self.schemedir = schemedir or default_schemedir
73 self.uci = luci.model.uci
74 self.err = luci.uvl.errors
75 self.dep = luci.uvl.dependencies
76 self.datatypes = luci.uvl.datatypes
80 --- Parse given scheme and return the scheme tree.
81 -- @param scheme Name of the scheme to parse
82 -- @return Table containing the parsed scheme or nil on error
83 -- @return String containing the reason for errors (if any)
84 function UVL.get_scheme( self, scheme )
85 if not self.packages[scheme] then
86 local ok, err = self:read_scheme( scheme )
91 return self.packages[scheme], nil
94 --- Validate given configuration, section or option.
95 -- @param config Name of the configuration to validate
96 -- @param section Name of the section to validate (optional)
97 -- @param option Name of the option to validate (optional)
98 -- @return Boolean indicating whether the given config validates
99 -- @return String containing the reason for errors (if any)
100 function UVL.validate( self, config, section, option )
101 if config and section and option then
102 return self:validate_option( config, section, option )
103 elseif config and section then
104 return self:validate_section( config, section )
106 return self:validate_config( config )
110 --- Validate given configuration.
111 -- @param config Name of the configuration to validate
112 -- @return Boolean indicating whether the given config validates
113 -- @return String containing the reason for errors (if any)
114 function UVL.validate_config( self, config, uci )
116 if not self.packages[config] then
117 local ok, err = self:read_scheme(config)
123 local co = luci.uvl.config( self, uci or config, uci and config )
129 if not co:config() then
130 return false, co:errors()
133 local function _uci_foreach( type, func )
134 for k, v in pairs(co:config()) do
135 if v['.type'] == type then
136 sc[type] = sc[type] + 1
137 local ok, err = func( k, v )
138 if not ok then co:error(err) end
143 for k, v in pairs( self.packages[config].sections ) do
147 return self:_validate_section( co:section(s) )
152 if STRICT_UNKNOWN_SECTIONS then
153 for k, v in pairs(co:config()) do
154 local so = co:section(k)
155 if not self.beenthere[so:cid()] then
156 co:error(ERR.SECT_UNKNOWN(so))
161 for _, k in ipairs(luci.util.keys(sc)) do
162 local so = co:section(k)
163 if so:scheme('required') and sc[k] == 0 then
164 co:error(ERR.SECT_REQUIRED(so))
165 elseif so:scheme('unique') and sc[k] > 1 then
166 co:error(ERR.SECT_UNIQUE(so))
170 return co:ok(), co:errors()
173 --- Validate given config section.
174 -- @param config Name of the configuration to validate
175 -- @param section Name of the section to validate
176 -- @return Boolean indicating whether the given config validates
177 -- @return String containing the reason for errors (if any)
178 function UVL.validate_section( self, config, section, uci )
180 if not self.packages[config] then
181 local ok, err = self:read_scheme( config )
187 local co = luci.uvl.config( self, uci or config, uci and config )
188 local so = co:section( section )
193 if not co:config() then
194 return false, co:errors()
198 return self:_validate_section( so )
200 return false, ERR.SECT_NOTFOUND(so)
204 --- Validate given config option.
205 -- @param config Name of the configuration to validate
206 -- @param section Name of the section to validate
207 -- @param option Name of the option to validate
208 -- @return Boolean indicating whether the given config validates
209 -- @return String containing the reason for errors (if any)
210 function UVL.validate_option( self, config, section, option, uci )
212 if not self.packages[config] then
213 local ok, err = self:read_scheme( config )
219 local co = luci.uvl.config( self, uci or config, uci and config )
220 local so = co:section( section )
221 local oo = so:option( option )
223 if not co:config() then
224 return false, co:errors()
227 if so:config() and oo:config() then
228 return self:_validate_option( oo )
230 return false, ERR.OPT_NOTFOUND(oo)
235 function UVL._validate_section( self, section )
237 self.beenthere[section:cid()] = true
239 if section:config() then
240 if section:scheme('named') == true and
241 section:config('.anonymous') == true
243 return false, ERR.SECT_NAMED(section)
246 for _, v in ipairs(section:variables()) do
247 local ok, err = self:_validate_option( v )
249 v:scheme('required') or v:scheme('type') == "enum" or (
250 not err:is(ERR.ERR_DEP_NOTEQUAL) and
251 not err:is(ERR.ERR_DEP_NOVALUE)
258 local ok, err = luci.uvl.dependencies.check( self, section )
263 return false, ERR.SECT_NOTFOUND(section)
266 if STRICT_UNKNOWN_OPTIONS and not section:scheme('dynamic') then
267 for k, v in pairs(section:config()) do
268 local oo = section:option(k)
269 if k:sub(1,1) ~= "." and not self.beenthere[oo:cid()] then
270 section:error(ERR.OPT_UNKNOWN(oo))
275 return section:ok(), section:errors()
278 function UVL._validate_option( self, option, nodeps )
280 self.beenthere[option:cid()] = true
282 if not option:scheme() and not option:parent():scheme('dynamic') then
283 if STRICT_UNKNOWN_OPTIONS then
284 return false, option:error(ERR.OPT_UNKNOWN(option))
289 elseif option:scheme() then
290 if option:scheme('required') and not option:value() then
291 return false, option:error(ERR.OPT_REQUIRED(option))
293 elseif option:value() then
294 local val = option:value()
296 if option:scheme('type') == "reference" or
297 option:scheme('type') == "enum"
299 local scheme_values = option:scheme('values') or { }
300 local config_values = ( type(val) == "table" and val or { val } )
301 for _, v in ipairs(config_values) do
302 if not scheme_values[v] then
303 return false, option:error( ERR.OPT_BADVALUE(
304 option, { v, luci.util.serialize_data(
305 luci.util.keys(scheme_values)
310 elseif option:scheme('type') == "list" then
311 if type(val) ~= "table" and STRICT_LIST_TYPE then
312 return false, option:error(ERR.OPT_NOTLIST(option))
316 if option:scheme('datatype') then
317 local dt = option:scheme('datatype')
319 if self.datatypes[dt] then
320 val = ( type(val) == "table" and val or { val } )
321 for i, v in ipairs(val) do
322 if not self.datatypes[dt]( v ) then
323 return false, option:error(
324 ERR.OPT_INVVALUE(option, { v, dt })
329 return false, option:error(ERR.OPT_DATATYPE(option, dt))
335 local ok, err = luci.uvl.dependencies.check( self, option )
341 local ok, err = luci.uvl.validation.check( self, option )
342 if not ok and STRICT_EXTERNAL_VALIDATORS then
343 return false, option:error(err)
347 return option:ok(), option:errors()
350 --- Find all parts of given scheme and construct validation tree.
351 -- This is normally done on demand, so you don't have to call this function
353 -- @param scheme Name of the scheme to parse
354 -- @param alias Create an alias for the loaded scheme
355 function UVL.read_scheme( self, scheme, alias )
357 local so = luci.uvl.scheme( self, scheme )
358 local bc = "%s/bytecode/%s.lua" %{ self.schemedir, scheme }
360 if not luci.fs.access(bc) then
362 local files = luci.fs.glob(self.schemedir .. '/*/' .. scheme)
365 for i, file in ipairs( files ) do
366 if not luci.fs.access(file) then
367 return false, so:error(ERR.SME_READ(so,file))
370 local uci = luci.model.uci.cursor( luci.fs.dirname(file), default_savedir )
372 local sd, err = uci:get_all( luci.fs.basename(file) )
375 return false, ERR.UCILOAD(so, err)
378 table.insert( schemes, sd )
381 local ok, err = self:_read_scheme_parts( so, schemes )
382 if ok and alias then self.packages[alias] = self.packages[scheme] end
385 return false, so:error(ERR.SME_FIND(so, self.schemedir))
388 local sc = loadfile(bc)
390 self.packages[scheme] = sc()
393 return false, so:error(ERR.SME_READ(so,bc))
398 -- Process all given parts and construct validation tree
399 function UVL._read_scheme_parts( self, scheme, schemes )
401 -- helper function to check for required fields
402 local function _req( t, n, c, r )
403 for i, v in ipairs(r) do
405 local p, o = scheme:sid(), nil
407 if t == TYPE_SECTION then
408 o = section( scheme, nil, p, n )
409 elseif t == TYPE_OPTION then
410 o = option( scheme, nil, p, '(nil)', n )
411 elseif t == TYPE_ENUM then
412 o = enum( scheme, nil, p, '(nil)', '(nil)', n )
415 return false, ERR.SME_REQFLD(o,v)
421 -- helper function to validate references
422 local function _ref( c, t )
424 if c == TYPE_SECTION then
427 elseif c == TYPE_OPTION then
430 elseif c == TYPE_ENUM then
435 local r = luci.util.split( t[k], "." )
436 r[1] = ( #r[1] > 0 and r[1] or scheme:sid() )
439 return false, ERR.SME_BADREF(scheme, k)
445 -- helper function to read bools
446 local function _bool( v )
447 return ( v == "true" or v == "yes" or v == "on" or v == "1" )
453 -- Step 0: get package meta information
454 for i, conf in ipairs( schemes ) do
455 for k, v in pairs( conf ) do
456 if v['.type'] == 'package' then
457 self.packages[scheme:sid()] =
458 self.packages[scheme:sid()] or {
459 ["name"] = scheme:sid();
464 for k, v2 in pairs(v) do
465 if k == "title" or k == "description" then
466 self.packages[scheme:sid()][k] = v2
473 -- Step 1: get all sections
474 for i, conf in ipairs( schemes ) do
475 for k, v in pairs( conf ) do
476 if v['.type'] == 'section' then
478 ok, err = _req( TYPE_SECTION, k, v, { "name", "package" } )
479 if err then return false, scheme:error(err) end
481 local r, err = _ref( TYPE_SECTION, v )
482 if err then return false, scheme:error(err) end
484 self.packages[r[1]] =
485 self.packages[r[1]] or {
491 local p = self.packages[r[1]]
492 p.sections[v.name] = p.sections[v.name] or { }
493 p.variables[v.name] = p.variables[v.name] or { }
495 local s = p.sections[v.name]
496 local so = scheme:section(v.name)
498 for k, v2 in pairs(v) do
499 if k ~= "name" and k ~= "package" and k:sub(1,1) ~= "." then
500 if k == "depends" then
501 s.depends = self:_read_dependency( v2, s.depends )
502 if not s.depends then
503 return false, scheme:error(
504 ERR.SME_BADDEP(so, luci.util.serialize_data(s.depends))
507 elseif k == "dynamic" or k == "unique" or
508 k == "required" or k == "named"
517 s.dynamic = s.dynamic or false
518 s.unique = s.unique or false
519 s.required = s.required or false
520 s.named = s.named or false
525 -- Step 2: get all variables
526 for i, conf in ipairs( schemes ) do
527 for k, v in pairs( conf ) do
528 if v['.type'] == "variable" then
530 ok, err = _req( TYPE_OPTION, k, v, { "name", "section" } )
531 if err then return false, scheme:error(err) end
533 local r, err = _ref( TYPE_OPTION, v )
534 if err then return false, scheme:error(err) end
536 local p = self.packages[r[1]]
538 return false, scheme:error(
539 ERR.SME_VBADPACK({scheme:sid(), '', v.name}, r[1])
543 local s = p.variables[r[2]]
545 return false, scheme:error(
546 ERR.SME_VBADSECT({scheme:sid(), '', v.name}, r[2])
550 s[v.name] = s[v.name] or { }
553 local so = scheme:section(r[2])
554 local to = so:option(v.name)
556 for k, v2 in pairs(v) do
557 if k ~= "name" and k ~= "section" and k:sub(1,1) ~= "." then
558 if k == "depends" then
559 t.depends = self:_read_dependency( v2, t.depends )
560 if not t.depends then
561 return false, scheme:error(so:error(
562 ERR.SME_BADDEP(to, luci.util.serialize_data(v2))
565 elseif k == "validator" then
566 t.validators = self:_read_validator( v2, t.validators )
567 if not t.validators then
568 return false, scheme:error(so:error(
569 ERR.SME_BADVAL(to, luci.util.serialize_data(v2))
572 elseif k == "valueof" then
573 local values, err = self:_read_reference( v2 )
575 return false, scheme:error(so:error(
576 ERR.REFERENCE(to, luci.util.serialize_data(v2)):child(err)
581 elseif k == "required" then
589 t.type = t.type or "variable"
590 t.datatype = t.datatype or "string"
591 t.required = t.required or false
596 -- Step 3: get all enums
597 for i, conf in ipairs( schemes ) do
598 for k, v in pairs( conf ) do
599 if v['.type'] == "enum" then
601 ok, err = _req( TYPE_ENUM, k, v, { "value", "variable" } )
602 if err then return false, scheme:error(err) end
604 local r, err = _ref( TYPE_ENUM, v )
605 if err then return false, scheme:error(err) end
607 local p = self.packages[r[1]]
609 return false, scheme:error(
610 ERR.SME_EBADPACK({scheme:sid(), '', '', v.value}, r[1])
614 local s = p.variables[r[2]]
616 return false, scheme:error(
617 ERR.SME_EBADSECT({scheme:sid(), '', '', v.value}, r[2])
623 return false, scheme:error(
624 ERR.SME_EBADOPT({scheme:sid(), '', '', v.value}, r[3])
629 local so = scheme:section(r[2])
630 local oo = so:option(r[3])
631 local eo = oo:enum(v.value)
633 if t.type ~= "enum" and t.type ~= "reference" then
634 return false, scheme:error(ERR.SME_EBADTYPE(eo))
638 t.values = { [v.value] = v.title or v.value }
640 t.values[v.value] = v.title or v.value
643 if not t.enum_depends then
649 return false, scheme:error(ERR.SME_EBADDEF(eo))
655 t.enum_depends[v.value] = self:_read_dependency(
656 v.depends, t.enum_depends[v.value]
659 if not t.enum_depends[v.value] then
660 return false, scheme:error(so:error(oo:error(
661 ERR.SME_BADDEP(eo, luci.util.serialize_data(v.depends))
672 -- Read a dependency specification
673 function UVL._read_dependency( self, values, deps )
674 local expr = "%$?[a-zA-Z0-9_]+"
676 values = ( type(values) == "table" and values or { values } )
677 for _, value in ipairs(values) do
678 local parts = luci.util.split( value, "%s*,%s*", nil, true )
679 local condition = { }
680 for i, val in ipairs(parts) do
681 local k, v = unpack(luci.util.split(val, "%s*=%s*", nil, true))
684 k:match("^"..expr.."%."..expr.."%."..expr.."$") or
685 k:match("^"..expr.."%."..expr.."$") or
686 k:match("^"..expr.."$")
688 condition[k] = v or true
697 table.insert( deps, condition )
705 -- Read a validator specification
706 function UVL._read_validator( self, values, validators )
708 values = ( type(values) == "table" and values or { values } )
709 for _, value in ipairs(values) do
712 if value:match("^exec:") then
713 validator = value:gsub("^exec:","")
714 elseif value:match("^lua:") then
715 validator = self:_resolve_function( (value:gsub("^lua:","") ) )
716 elseif value:match("^regexp:") then
717 local pattern = value:gsub("^regexp:","")
718 validator = function( type, dtype, pack, sect, optn, ... )
719 local values = { ... }
720 for _, v in ipairs(values) do
722 luci.util.copcall( string.match, v, pattern )
726 elseif not match then
728 'Value "%s" does not match pattern "%s"' % {
738 if not validators then
739 validators = { validator }
741 table.insert( validators, validator )
752 -- Read a reference specification (XXX: We should validate external configs too...)
753 function UVL._read_reference( self, values )
755 values = ( type(values) == "table" and values or { values } )
757 for _, value in ipairs(values) do
758 local ref = luci.util.split(value, ".")
760 if #ref == 2 or #ref == 3 then
761 local co = luci.uvl.config( self, ref[1] )
762 if not co:config() then return false, co:errors() end
764 for k, v in pairs(co:config()) do
765 if v['.type'] == ref[2] then
767 if v['.anonymous'] == true then
768 return false, ERR.SME_INVREF('', value)
770 val[k] = k -- XXX: title/description would be nice
771 elseif v[ref[3]] then
772 val[v[ref[3]]] = v[ref[3]] -- XXX: dito
777 return false, ERR.SME_BADREF('', value)
784 -- Resolve given path
785 function UVL._resolve_function( self, value )
786 local path = luci.util.split(value, ".")
789 local stat, mod = luci.util.copcall(
790 require, table.concat(path, ".", 1, i)
794 for j=i+1, #path-1 do
795 if not type(mod) == "table" then
803 mod = type(mod) == "table" and mod[path[#path]] or nil
804 if type(mod) == "function" then
812 --- Object representation of an uvl item - base class.
813 uvlitem = luci.util.class()
815 function uvlitem.cid(self)
816 if #self.cref == 1 then
819 local r = { unpack(self.cref) }
821 if c and c[r[2]] and c[r[2]]['.anonymous'] and c[r[2]]['.index'] then
822 r[2] = '@' .. c[r[2]]['.type'] ..
823 '[' .. tostring(c[r[2]]['.index']) .. ']'
825 return table.concat( r, '.' )
829 function uvlitem.sid(self)
830 return table.concat( self.sref, '.' )
833 function uvlitem.scheme(self, opt)
836 if #self.sref == 4 or #self.sref == 3 then
837 s = self.s and self.s.packages
838 s = s and s[self.sref[1]]
839 s = s and s.variables
840 s = s and s[self.sref[2]]
841 s = s and s[self.sref[3]]
842 elseif #self.sref == 2 then
843 s = self.s and self.s.packages
844 s = s and s[self.sref[1]]
846 s = s and s[self.sref[2]]
848 s = self.s and self.s.packages
849 s = s and s[self.sref[1]]
859 function uvlitem.config(self, opt)
862 if #self.cref == 4 or #self.cref == 3 then
863 c = self.c and self.c[self.cref[2]] or nil
864 c = c and c[self.cref[3]] or nil
865 elseif #self.cref == 2 then
866 c = self.c and self.c[self.cref[2]] or nil
878 function uvlitem.title(self)
879 return self:scheme() and self:scheme('title') or
880 self.cref[3] or self.cref[2] or self.cref[1]
883 function uvlitem.type(self)
884 if self.t == luci.uvl.TYPE_CONFIG then
886 elseif self.t == luci.uvl.TYPE_SECTION then
888 elseif self.t == luci.uvl.TYPE_OPTION then
890 elseif self.t == luci.uvl.TYPE_ENUM then
895 function uvlitem.error(self, ...)
897 local errconst = { ERR.CONFIG, ERR.SECTION, ERR.OPTION, ERR.OPTION }
898 self.e = errconst[#self.cref]( self )
901 return self.e:child( ... )
904 function uvlitem.errors(self)
908 function uvlitem.ok(self)
909 return not self:errors()
912 function uvlitem.parent(self)
915 elseif #self.cref == 3 or #self.cref == 4 then
916 return luci.uvl.section( self.s, self.c, self.cref[1], self.cref[2] )
917 elseif #self.cref == 2 then
918 return luci.uvl.config( self.s, self.c, self.cref[1] )
924 function uvlitem._loadconf(self, co, c)
926 local uci, err = luci.model.uci.cursor(), nil
927 co, err = uci:get_all(c)
930 self:error(ERR.UCILOAD(self, err))
937 --- Object representation of a scheme.
940 -- @name luci.uvl.scheme
942 --- Scheme instance constructor.
945 -- @param scheme Scheme instance
946 -- @param co Configuration data
947 -- @param c Configuration name
948 -- @return Config instance
949 scheme = luci.util.class(uvlitem)
951 function scheme.__init__(self, scheme, co, c)
958 self.c = self:_loadconf(co, c)
960 self.t = luci.uvl.TYPE_SCHEME
963 --- Add an error to scheme.
964 -- @return Scheme error context
965 function scheme.error(self, ...)
966 if not self.e then self.e = ERR.SCHEME( self ) end
967 return self.e:child( ... )
970 --- Get an associated config object.
971 -- @return Config instance
972 function scheme.config(self)
973 local co = luci.uvl.config( self.s, self.cref[1] )
979 --- Get all section objects associated with this scheme.
980 -- @return Table containing all associated luci.uvl.section instances
981 function scheme.sections(self)
983 if self.s.packages[self.sref[1]].sections then
984 for o, _ in pairs( self.s.packages[self.sref[1]].sections ) do
985 table.insert( v, luci.uvl.option(
986 self.s, self.c, self.cref[1], self.cref[2], o
993 --- Get an associated section object.
994 -- @param s Section to select
995 -- @return Section instance
996 function scheme.section(self, s)
997 local so = luci.uvl.section( self.s, self.c, self.cref[1], s )
1004 --- Object representation of a config.
1007 -- @name luci.uvl.config
1009 --- Config instance constructor.
1012 -- @param scheme Scheme instance
1013 -- @param co Configuration data
1014 -- @param c Configuration name
1015 -- @return Config instance
1016 config = luci.util.class(uvlitem)
1018 function config.__init__(self, scheme, co, c)
1025 self.c = self:_loadconf(co, c)
1027 self.t = luci.uvl.TYPE_CONFIG
1030 --- Get all section objects associated with this config.
1031 -- @return Table containing all associated luci.uvl.section instances
1032 function config.sections(self)
1034 if self.s.packages[self.sref[1]].sections then
1035 for o, _ in pairs( self.s.packages[self.sref[1]].sections ) do
1036 table.insert( v, luci.uvl.option(
1037 self.s, self.c, self.cref[1], self.cref[2], o
1044 --- Get an associated section object.
1045 -- @param s Section to select
1046 -- @return Section instance
1047 function config.section(self, s)
1048 local so = luci.uvl.section( self.s, self.c, self.cref[1], s )
1055 --- Object representation of a scheme/config section.
1058 -- @name luci.uvl.section
1060 --- Section instance constructor.
1063 -- @param scheme Scheme instance
1064 -- @param co Configuration data
1065 -- @param c Configuration name
1066 -- @param s Section name
1067 -- @return Section instance
1068 section = luci.util.class(uvlitem)
1070 function section.__init__(self, scheme, co, c, s)
1071 self.cref = { c, s }
1072 self.sref = { c, co and co[s] and co[s]['.type'] or s }
1073 self.c = self:_loadconf(co, c)
1075 self.t = luci.uvl.TYPE_SECTION
1078 --- Get all option objects associated with this section.
1079 -- @return Table containing all associated luci.uvl.option instances
1080 function section.variables(self)
1082 if self.s.packages[self.sref[1]].variables[self.sref[2]] then
1084 self.s.packages[self.sref[1]].variables[self.sref[2]]
1086 table.insert( v, luci.uvl.option(
1087 self.s, self.c, self.cref[1], self.cref[2], o
1094 --- Get an associated option object.
1095 -- @param o Option to select
1096 -- @return Option instance
1097 function section.option(self, o)
1098 local oo = luci.uvl.option( self.s, self.c, self.cref[1], self.cref[2], o )
1105 --- Object representation of a scheme/config option.
1108 -- @name luci.uvl.option
1110 --- Section instance constructor.
1113 -- @param scheme Scheme instance
1114 -- @param co Configuration data
1115 -- @param c Configuration name
1116 -- @param s Section name
1117 -- @param o Option name
1118 -- @return Option instance
1119 option = luci.util.class(uvlitem)
1121 function option.__init__(self, scheme, co, c, s, o)
1122 self.cref = { c, s, o }
1123 self.sref = { c, co and co[s] and co[s]['.type'] or s, o }
1124 self.c = self:_loadconf(co, c)
1126 self.t = luci.uvl.TYPE_OPTION
1129 --- Get the value of this option.
1130 -- @return The associated configuration value
1131 function option.value(self)
1132 local v = self:config() or self:scheme('default')
1133 if v and self:scheme('multival') then
1134 v = luci.util.split( v, "%s+", nil, true )
1139 --- Get the associated section information in scheme.
1140 -- @return Table containing the scheme properties
1141 function option.section(self)
1142 return self.s.packages[self.sref[1]].sections[self.sref[2]]
1145 --- Construct an enum object instance from given or default value.
1146 -- @param v Value to select
1147 -- @return Enum instance for selected value
1148 function option.enum(self, val)
1151 self.cref[1], self.cref[2], self.cref[3],
1157 --- Object representation of a enum value.
1160 -- @name luci.uvl.enum
1162 --- Section instance constructor.
1165 -- @param scheme Scheme instance
1166 -- @param co Configuration data
1167 -- @param c Configuration name
1168 -- @param s Section name
1169 -- @param o Enum name
1170 -- @param v Enum value
1171 -- @return Enum value instance
1172 enum = luci.util.class(option)
1174 function enum.__init__(self, scheme, co, c, s, o, v)
1175 self.cref = { c, s, o, v }
1176 self.sref = { c, co and co[s] and co[s]['.type'] or s, o, v }
1177 self.c = self:_loadconf(co, c)
1179 self.t = luci.uvl.TYPE_ENUM