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 local fs = require "luci.fs"
23 local uci = require "luci.model.uci"
24 local util = require "luci.util"
25 local table = require "table"
26 local string = require "string"
28 local require, pcall, ipairs, pairs = require, pcall, ipairs, pairs
29 local type, error, tonumber, tostring = type, error, tonumber, tostring
30 local unpack, loadfile = unpack, loadfile
34 local ERR = require "luci.uvl.errors"
35 local datatypes = require "luci.uvl.datatypes"
36 local validation = require "luci.uvl.validation"
37 local dependencies = require "luci.uvl.dependencies"
39 local TYPE_SCHEME = 0x00
40 local TYPE_CONFIG = 0x01
41 local TYPE_SECTION = 0x02
42 local TYPE_OPTION = 0x03
43 local TYPE_ENUM = 0x04
45 --- Boolean; default true;
46 -- treat sections found in config but not in scheme as error
47 STRICT_UNKNOWN_SECTIONS = true
49 --- Boolean; default true;
50 -- treat options found in config but not in scheme as error
51 STRICT_UNKNOWN_OPTIONS = true
53 --- Boolean; default true;
54 -- treat failed external validators as error
55 STRICT_EXTERNAL_VALIDATORS = true
57 --- Boolean; default true;
58 -- treat list values stored as options like errors
59 STRICT_LIST_TYPE = true
62 local default_schemedir = "/lib/uci/schema"
63 local default_savedir = "/tmp/.uvl"
66 --- Object constructor
69 -- @param schemedir Path to the scheme directory (optional)
70 -- @return Instance object
73 function UVL.__init__( self, schemedir )
74 self.schemedir = schemedir or default_schemedir
80 self.dep = dependencies
81 self.datatypes = datatypes
85 --- Parse given scheme and return the scheme tree.
86 -- @param scheme Name of the scheme to parse
87 -- @return Table containing the parsed scheme or nil on error
88 -- @return String containing the reason for errors (if any)
89 function UVL.get_scheme( self, scheme )
90 if not self.packages[scheme] then
91 local ok, err = self:read_scheme( scheme )
96 return self.packages[scheme], nil
99 --- Validate given configuration, section or option.
100 -- @param config Name of the configuration to validate
101 -- @param section Name of the section to validate (optional)
102 -- @param option Name of the option to validate (optional)
103 -- @return Boolean indicating whether the given config validates
104 -- @return String containing the reason for errors (if any)
105 function UVL.validate( self, config, section, option )
106 if config and section and option then
107 return self:validate_option( config, section, option )
108 elseif config and section then
109 return self:validate_section( config, section )
111 return self:validate_config( config )
115 --- Validate given configuration.
116 -- @param cfg Name of the configuration to validate
117 -- @return Boolean indicating whether the given config validates
118 -- @return String containing the reason for errors (if any)
119 function UVL.validate_config( self, cfg, uci )
121 if not self.packages[cfg] then
122 local ok, err = self:read_scheme(cfg)
128 local co = config( self, uci or cfg, uci and cfg )
134 if not co:config() then
135 return false, co:errors()
138 local function _uci_foreach( type, func )
139 for k, v in pairs(co:config()) do
140 if v['.type'] == type then
141 sc[type] = sc[type] + 1
142 local ok, err = func( k, v )
143 if not ok then co:error(err) end
148 for k, v in pairs( self.packages[cfg].sections ) do
152 return self:_validate_section( co:section(s) )
157 if STRICT_UNKNOWN_SECTIONS then
158 for k, v in pairs(co:config()) do
159 local so = co:section(k)
160 if not self.beenthere[so:cid()] then
161 co:error(ERR.SECT_UNKNOWN(so))
166 for _, k in ipairs(util.keys(sc)) do
167 local so = co:section(k)
168 if so:scheme('required') and sc[k] == 0 then
169 co:error(ERR.SECT_REQUIRED(so))
170 elseif so:scheme('unique') and sc[k] > 1 then
171 co:error(ERR.SECT_UNIQUE(so))
175 return co:ok(), co:errors()
178 --- Validate given config section.
179 -- @param config Name of the configuration to validate
180 -- @param section Name of the section to validate
181 -- @return Boolean indicating whether the given config validates
182 -- @return String containing the reason for errors (if any)
183 function UVL.validate_section( self, cfg, section, uci )
185 if not self.packages[cfg] then
186 local ok, err = self:read_scheme( cfg )
192 local co = config( self, uci or cfg, uci and cfg )
193 local so = co:section( section )
198 if not co:config() then
199 return false, co:errors()
203 return self:_validate_section( so )
205 return false, ERR.SECT_NOTFOUND(so)
209 --- Validate given config option.
210 -- @param config Name of the configuration to validate
211 -- @param section Name of the section to validate
212 -- @param option Name of the option to validate
213 -- @return Boolean indicating whether the given config validates
214 -- @return String containing the reason for errors (if any)
215 function UVL.validate_option( self, cfg, section, option, uci )
217 if not self.packages[cfg] then
218 local ok, err = self:read_scheme( cfg )
224 local co = config( self, uci or cfg, uci and cfg )
225 local so = co:section( section )
226 local oo = so:option( option )
228 if not co:config() then
229 return false, co:errors()
232 if so:config() and oo:config() then
233 return self:_validate_option( oo )
235 return false, ERR.OPT_NOTFOUND(oo)
240 function UVL._validate_section( self, section )
242 self.beenthere[section:cid()] = true
244 if section:config() then
245 if section:scheme('named') == true and
246 section:config('.anonymous') == true
248 return false, ERR.SECT_NAMED(section)
251 for _, v in ipairs(section:variables()) do
252 local ok, err = self:_validate_option( v )
254 v:scheme('required') or v:scheme('type') == "enum" or (
255 not err:is(ERR.ERR_DEP_NOTEQUAL) and
256 not err:is(ERR.ERR_DEP_NOVALUE)
263 local ok, err = dependencies.check( self, section )
268 return false, ERR.SECT_NOTFOUND(section)
271 if STRICT_UNKNOWN_OPTIONS and not section:scheme('dynamic') then
272 for k, v in pairs(section:config()) do
273 local oo = section:option(k)
274 if k:sub(1,1) ~= "." and not self.beenthere[oo:cid()] then
275 section:error(ERR.OPT_UNKNOWN(oo))
280 return section:ok(), section:errors()
283 function UVL._validate_option( self, option, nodeps )
285 self.beenthere[option:cid()] = true
287 if not option:scheme() and not option:parent():scheme('dynamic') then
288 if STRICT_UNKNOWN_OPTIONS then
289 return false, option:error(ERR.OPT_UNKNOWN(option))
294 elseif option:scheme() then
296 local ok, err = dependencies.check( self, option )
298 if not err:is_all(ERR.ERR_DEP_NOTEQUAL) and
299 not err:is_all(ERR.ERR_DEP_NOVALUE)
302 return false, option:errors()
309 if option:scheme('required') and not option:value() then
310 return false, option:error(ERR.OPT_REQUIRED(option))
312 elseif option:value() then
313 local val = option:value()
315 if option:scheme('type') == "reference" or
316 option:scheme('type') == "enum"
318 local scheme_values = option:scheme('values') or { }
319 local config_values = ( type(val) == "table" and val or { val } )
320 for _, v in ipairs(config_values) do
321 if not scheme_values[v] then
322 return false, option:error( ERR.OPT_BADVALUE(
323 option, { v, util.serialize_data(
324 util.keys(scheme_values)
329 elseif option:scheme('type') == "list" then
330 if type(val) ~= "table" and STRICT_LIST_TYPE then
331 return false, option:error(ERR.OPT_NOTLIST(option))
335 if option:scheme('datatype') then
336 local dt = option:scheme('datatype')
338 if self.datatypes[dt] then
339 val = ( type(val) == "table" and val or { val } )
340 for i, v in ipairs(val) do
341 if not self.datatypes[dt]( v ) then
342 return false, option:error(
343 ERR.OPT_INVVALUE(option, { v, dt })
348 return false, option:error(ERR.OPT_DATATYPE(option, dt))
352 val = ( type(val) == "table" and val or { val } )
353 for _, v in ipairs(val) do
354 if option:scheme('minlength') then
355 if #v < option:scheme('minlength') then
356 return false, option:error(ERR.OPT_RANGE(option))
360 if option:scheme('maxlength') then
361 if #v > option:scheme('maxlength') then
362 return false, option:error(ERR.OPT_RANGE(option))
368 if option:scheme('minimum') then
369 if not v or v < option:scheme('minimum') then
370 return false, option:error(ERR.OPT_RANGE(option))
374 if option:scheme('maximum') then
375 if not v or v > option:scheme('maximum') then
376 return false, option:error(ERR.OPT_RANGE(option))
382 local ok, err = validation.check( self, option )
383 if not ok and STRICT_EXTERNAL_VALIDATORS then
384 return false, option:error(err)
388 return option:ok(), option:errors()
391 --- Find all parts of given scheme and construct validation tree.
392 -- This is normally done on demand, so you don't have to call this function
394 -- @param shm Name of the scheme to parse
395 -- @param alias Create an alias for the loaded scheme
396 function UVL.read_scheme( self, shm, alias )
398 local so = scheme( self, shm )
399 local bc = "%s/bytecode/%s.lua" %{ self.schemedir, shm }
401 if not fs.access(bc) then
402 local files = fs.glob(self.schemedir .. '/*/' .. shm)
406 for i, file in ipairs( files ) do
407 if not fs.access(file) then
408 return false, so:error(ERR.SME_READ(so,file))
411 local uci = uci.cursor( fs.dirname(file), default_savedir )
413 local sname = fs.basename(file)
414 local sd, err = uci:load( sname )
417 return false, ERR.UCILOAD(so, err)
420 ok, err = pcall(function()
421 uci:foreach(sname, "package", function(s)
422 self:_parse_package(so, s[".name"], s)
424 uci:foreach(sname, "section", function(s)
425 self:_parse_section(so, s[".name"], s)
427 uci:foreach(sname, "variable", function(s)
428 self:_parse_var(so, s[".name"], s)
430 uci:foreach(sname, "enum", function(s)
431 self:_parse_enum(so, s[".name"], s)
437 if ok and alias then self.packages[alias] = self.packages[shm] end
438 return ok and self, err
440 return false, so:error(ERR.SME_FIND(so, self.schemedir))
443 local sc = loadfile(bc)
445 self.packages[shm] = sc()
448 return false, so:error(ERR.SME_READ(so,bc))
453 -- helper function to check for required fields
454 local function _req( t, n, c, r )
455 for i, v in ipairs(r) do
457 local p, o = scheme:sid(), nil
459 if t == TYPE_SECTION then
460 o = section( scheme, nil, p, n )
461 elseif t == TYPE_OPTION then
462 o = option( scheme, nil, p, '(nil)', n )
463 elseif t == TYPE_ENUM then
464 o = enum( scheme, nil, p, '(nil)', '(nil)', n )
467 return false, ERR.SME_REQFLD(o,v)
473 -- helper function to validate references
474 local function _ref( c, t )
476 if c == TYPE_SECTION then
479 elseif c == TYPE_OPTION then
482 elseif c == TYPE_ENUM then
487 for o in t[k]:gmatch("[^.]+") do
490 r[1] = ( #r[1] > 0 and r[1] or scheme:sid() )
493 return false, ERR.SME_BADREF(scheme, k)
499 -- helper function to read bools
500 local function _bool( v )
501 return ( v == "true" or v == "yes" or v == "on" or v == "1" )
504 -- Step 0: get package meta information
505 function UVL._parse_package(self, scheme, k, v)
506 local sid = scheme:sid()
507 local pkg = self.packages[sid] or {
514 pkg.description = v.description
516 self.packages[sid] = pkg
519 -- Step 1: get all sections
520 function UVL._parse_section(self, scheme, k, v)
521 local ok, err = _req( TYPE_SECTION, k, v, { "name", "package" } )
522 if err then error(scheme:error(err)) end
524 local r, err = _ref( TYPE_SECTION, v )
525 if err then error(scheme:error(err)) end
527 local p = self.packages[r[1]] or {
532 p.sections[v.name] = p.sections[v.name] or { }
533 p.variables[v.name] = p.variables[v.name] or { }
534 self.packages[r[1]] = p
536 local s = p.sections[v.name]
537 local so = scheme:section(v.name)
539 for k, v2 in pairs(v) do
540 if k ~= "name" and k ~= "package" and k:sub(1,1) ~= "." then
541 if k == "depends" then
542 s.depends = self:_read_dependency( v2, s.depends )
543 if not s.depends then
544 return false, scheme:error(
545 ERR.SME_BADDEP(so, util.serialize_data(s.depends))
548 elseif k == "dynamic" or k == "unique" or
549 k == "required" or k == "named"
558 s.dynamic = s.dynamic or false
559 s.unique = s.unique or false
560 s.required = s.required or false
561 s.named = s.named or false
564 -- Step 2: get all variables
565 function UVL._parse_var(self, scheme, k, v)
566 local ok, err = _req( TYPE_OPTION, k, v, { "name", "section" } )
567 if err then error(scheme:error(err)) end
569 local r, err = _ref( TYPE_OPTION, v )
570 if err then error(scheme:error(err)) end
572 local p = self.packages[r[1]]
575 ERR.SME_VBADPACK({scheme:sid(), '', v.name}, r[1])
579 local s = p.variables[r[2]]
582 ERR.SME_VBADSECT({scheme:sid(), '', v.name}, r[2])
586 s[v.name] = s[v.name] or { }
589 local so = scheme:section(r[2])
590 local to = so:option(v.name)
592 for k, v2 in pairs(v) do
593 if k ~= "name" and k ~= "section" and k:sub(1,1) ~= "." then
594 if k == "depends" then
595 t.depends = self:_read_dependency( v2, t.depends )
596 if not t.depends then
597 error(scheme:error(so:error(
598 ERR.SME_BADDEP(to, util.serialize_data(v2))
601 elseif k == "validator" then
602 t.validators = self:_read_validator( v2, t.validators )
603 if not t.validators then
604 error(scheme:error(so:error(
605 ERR.SME_BADVAL(to, util.serialize_data(v2))
608 elseif k == "valueof" then
609 local values, err = self:_read_reference( v2 )
611 error(scheme:error(so:error(
612 ERR.REFERENCE(to, util.serialize_data(v2)):child(err)
617 t.valueof = type(v2) == "table" and v2 or {v2}
618 elseif k == "required" then
620 elseif k == "minlength" or k == "maxlength" or
621 k == "minimum" or k == "maximum"
630 t.type = t.type or "variable"
631 t.datatype = t.datatype or "string"
632 t.required = t.required or false
635 -- Step 3: get all enums
636 function UVL._parse_enum(self, scheme, k, v)
637 local ok, err = _req( TYPE_ENUM, k, v, { "value", "variable" } )
638 if err then error(scheme:error(err)) end
640 local r, err = _ref( TYPE_ENUM, v )
641 if err then error(scheme:error(err)) end
643 local p = self.packages[r[1]]
646 ERR.SME_EBADPACK({scheme:sid(), '', '', v.value}, r[1])
650 local s = p.variables[r[2]]
653 ERR.SME_EBADSECT({scheme:sid(), '', '', v.value}, r[2])
660 ERR.SME_EBADOPT({scheme:sid(), '', '', v.value}, r[3])
665 local so = scheme:section(r[2])
666 local oo = so:option(r[3])
667 local eo = oo:enum(v.value)
669 if t.type ~= "enum" and t.type ~= "reference" then
670 error(scheme:error(ERR.SME_EBADTYPE(eo)))
674 t.values = { [v.value] = v.title or v.value }
675 t.valuelist = { {value = v.value, title = v.title} }
677 t.values[v.value] = v.title or v.value
678 t.valuelist[#t.valuelist + 1] = {value = v.value, title = v.title}
681 if not t.enum_depends then
687 error(scheme:error(ERR.SME_EBADDEF(eo)))
693 t.enum_depends[v.value] = self:_read_dependency(
694 v.depends, t.enum_depends[v.value]
697 if not t.enum_depends[v.value] then
698 error(scheme:error(so:error(oo:error(
699 ERR.SME_BADDEP(eo, util.serialize_data(v.depends))
705 -- Read a dependency specification
706 function UVL._read_dependency( self, values, deps )
707 local expr = "%$?[%w_]+"
709 values = ( type(values) == "table" and values or { values } )
710 for _, value in ipairs(values) do
711 local condition = { }
712 for val in value:gmatch("[^,]+") do
713 local k, e, v = val:match("%s*([%w$_.]+)%s*(=?)%s*(.*)")
716 k:match("^"..expr.."%."..expr.."%."..expr.."$") or
717 k:match("^"..expr.."%."..expr.."$") or
718 k:match("^"..expr.."$")
720 condition[k] = (e == '=') and v or true
729 deps[#deps+1] = condition
737 -- Read a validator specification
738 function UVL._read_validator( self, values, validators )
740 values = ( type(values) == "table" and values or { values } )
741 for _, value in ipairs(values) do
744 if value:match("^exec:") then
745 validator = value:gsub("^exec:","")
746 elseif value:match("^lua:") then
747 validator = self:_resolve_function( (value:gsub("^lua:","") ) )
748 elseif value:match("^regexp:") then
749 local pattern = value:gsub("^regexp:","")
750 validator = function( type, dtype, pack, sect, optn, ... )
751 local values = { ... }
752 for _, v in ipairs(values) do
754 pcall( string.match, v, pattern )
758 elseif not match then
760 'Value "%s" does not match pattern "%s"' % {
770 if not validators then
771 validators = { validator }
773 validators[#validators+1] = validator
784 -- Read a reference specification (XXX: We should validate external configs too...)
785 function UVL._read_reference( self, values )
787 values = ( type(values) == "table" and values or { values } )
789 for _, value in ipairs(values) do
790 local ref = util.split(value, ".")
792 if #ref == 2 or #ref == 3 then
793 local co = config( self, ref[1] )
794 if not co:config() then return false, co:errors() end
796 for k, v in pairs(co:config()) do
797 if v['.type'] == ref[2] then
799 if v['.anonymous'] == true then
800 return false, ERR.SME_INVREF('', value)
802 val[k] = k -- XXX: title/description would be nice
803 elseif v[ref[3]] then
804 val[v[ref[3]]] = v[ref[3]] -- XXX: dito
809 return false, ERR.SME_BADREF('', value)
816 -- Resolve given path
817 function UVL._resolve_function( self, value )
818 local path = util.split(value, ".")
821 local stat, mod = pcall(
822 require, table.concat(path, ".", 1, i)
826 for j=i+1, #path-1 do
827 if not type(mod) == "table" then
835 mod = type(mod) == "table" and mod[path[#path]] or nil
836 if type(mod) == "function" then
844 --- Object representation of an uvl item - base class.
845 uvlitem = util.class()
847 function uvlitem.cid(self)
848 if #self.cref == 1 then
851 local r = { unpack(self.cref) }
853 if c and c[r[2]] and c[r[2]]['.anonymous'] and c[r[2]]['.index'] then
854 r[2] = '@' .. c[r[2]]['.type'] ..
855 '[' .. tostring(c[r[2]]['.index']) .. ']'
857 return table.concat( r, '.' )
861 function uvlitem.sid(self)
862 return table.concat( self.sref, '.' )
865 function uvlitem.scheme(self, opt)
866 local s = self.s and self.s.packages
867 s = s and s[self.sref[1]]
868 if #self.sref == 4 or #self.sref == 3 then
869 s = s and s.variables
870 s = s and s[self.sref[2]]
871 s = s and s[self.sref[3]]
872 elseif #self.sref == 2 then
874 s = s and s[self.sref[2]]
884 function uvlitem.config(self, opt)
887 if #self.cref >= 2 and #self.cref <= 4 then
888 c = c and self.c[self.cref[2]] or nil
889 if #self.cref >= 3 then
890 c = c and c[self.cref[3]] or nil
901 function uvlitem.title(self)
902 return self:scheme() and self:scheme('title') or
903 self.cref[3] or self.cref[2] or self.cref[1]
906 function uvlitem.type(self)
907 if self.t == TYPE_CONFIG then
909 elseif self.t == TYPE_SECTION then
911 elseif self.t == TYPE_OPTION then
913 elseif self.t == TYPE_ENUM then
918 function uvlitem.error(self, ...)
920 local errconst = { ERR.CONFIG, ERR.SECTION, ERR.OPTION, ERR.OPTION }
921 self.e = errconst[#self.cref]( self )
924 return self.e:child( ... )
927 function uvlitem.errors(self)
931 function uvlitem.ok(self)
932 return not self:errors()
935 function uvlitem.parent(self)
938 elseif #self.cref == 3 or #self.cref == 4 then
939 return section( self.s, self.c, self.cref[1], self.cref[2] )
940 elseif #self.cref == 2 then
941 return config( self.s, self.c, self.cref[1] )
947 function uvlitem._loadconf(self, co, c)
948 co = co or self._configcache
951 co, err = uci.cursor():get_all(c)
954 self:error(ERR.UCILOAD(self, err))
957 self._configcache = co
963 --- Object representation of a scheme.
966 -- @name luci.uvl.scheme
968 --- Scheme instance constructor.
971 -- @param scheme Scheme instance
972 -- @param co Configuration data
973 -- @param c Configuration name
974 -- @return Config instance
975 scheme = util.class(uvlitem)
977 function scheme.__init__(self, scheme, co, c)
984 self.c = self:_loadconf(co, c)
989 --- Add an error to scheme.
990 -- @return Scheme error context
991 function scheme.error(self, ...)
992 if not self.e then self.e = ERR.SCHEME( self ) end
993 return self.e:child( ... )
996 --- Get an associated config object.
997 -- @return Config instance
998 function scheme.config(self)
999 local co = config( self.s, self.cref[1] )
1005 --- Get all section objects associated with this scheme.
1006 -- @return Table containing all associated luci.uvl.section instances
1007 function scheme.sections(self)
1009 if self.s.packages[self.sref[1]].sections then
1010 for o, _ in pairs( self.s.packages[self.sref[1]].sections ) do
1012 self.s, self.c, self.cref[1], self.cref[2], o
1019 --- Get an associated section object.
1020 -- @param s Section to select
1021 -- @return Section instance
1022 function scheme.section(self, s)
1023 local so = section( self.s, self.c, self.cref[1], s )
1030 --- Object representation of a config.
1033 -- @name luci.uvl.config
1035 --- Config instance constructor.
1038 -- @param scheme Scheme instance
1039 -- @param co Configuration data
1040 -- @param c Configuration name
1041 -- @return Config instance
1042 config = util.class(uvlitem)
1044 function config.__init__(self, scheme, co, c)
1051 self.c = self:_loadconf(co, c)
1053 self.t = TYPE_CONFIG
1056 --- Get all section objects associated with this config.
1057 -- @return Table containing all associated luci.uvl.section instances
1058 function config.sections(self)
1060 if self.s.packages[self.sref[1]].sections then
1061 for o, _ in pairs( self.s.packages[self.sref[1]].sections ) do
1063 self.s, self.c, self.cref[1], self.cref[2], o
1070 --- Get an associated section object.
1071 -- @param s Section to select
1072 -- @return Section instance
1073 function config.section(self, s)
1074 local so = section( self.s, self.c, self.cref[1], s )
1081 --- Object representation of a scheme/config section.
1084 -- @name luci.uvl.section
1086 --- Section instance constructor.
1089 -- @param scheme Scheme instance
1090 -- @param co Configuration data
1091 -- @param c Configuration name
1092 -- @param s Section name
1093 -- @return Section instance
1094 section = util.class(uvlitem)
1096 function section.__init__(self, scheme, co, c, s)
1097 self.cref = { c, s }
1098 self.sref = { c, co and co[s] and co[s]['.type'] or s }
1099 self.c = self:_loadconf(co, c)
1101 self.t = TYPE_SECTION
1104 --- Get all option objects associated with this section.
1105 -- @return Table containing all associated luci.uvl.option instances
1106 function section.variables(self)
1108 if self.s.packages[self.sref[1]].variables[self.sref[2]] then
1110 self.s.packages[self.sref[1]].variables[self.sref[2]]
1113 self.s, self.c, self.cref[1], self.cref[2], o
1120 --- Get an associated option object.
1121 -- @param o Option to select
1122 -- @return Option instance
1123 function section.option(self, o)
1124 local oo = option( self.s, self.c, self.cref[1], self.cref[2], o )
1131 --- Object representation of a scheme/config option.
1134 -- @name luci.uvl.option
1136 --- Section instance constructor.
1139 -- @param scheme Scheme instance
1140 -- @param co Configuration data
1141 -- @param c Configuration name
1142 -- @param s Section name
1143 -- @param o Option name
1144 -- @return Option instance
1145 option = util.class(uvlitem)
1147 function option.__init__(self, scheme, co, c, s, o)
1148 self.cref = { c, s, o }
1149 self.sref = { c, co and co[s] and co[s]['.type'] or s, o }
1150 self.c = self:_loadconf(co, c)
1152 self.t = TYPE_OPTION
1155 --- Get the value of this option.
1156 -- @return The associated configuration value
1157 function option.value(self)
1158 local v = self:config() or self:scheme('default')
1159 if v and self:scheme('multival') then
1160 v = util.split( v, "%s+", nil, true )
1165 --- Get the associated section information in scheme.
1166 -- @return Table containing the scheme properties
1167 function option.section(self)
1168 return self.s.packages[self.sref[1]].sections[self.sref[2]]
1171 --- Construct an enum object instance from given or default value.
1172 -- @param v Value to select
1173 -- @return Enum instance for selected value
1174 function option.enum(self, val)
1177 self.cref[1], self.cref[2], self.cref[3],
1183 --- Object representation of a enum value.
1186 -- @name luci.uvl.enum
1188 --- Section instance constructor.
1191 -- @param scheme Scheme instance
1192 -- @param co Configuration data
1193 -- @param c Configuration name
1194 -- @param s Section name
1195 -- @param o Enum name
1196 -- @param v Enum value
1197 -- @return Enum value instance
1198 enum = util.class(option)
1200 function enum.__init__(self, scheme, co, c, s, o, v)
1201 self.cref = { c, s, o, v }
1202 self.sref = { c, co and co[s] and co[s]['.type'] or s, o, v }
1203 self.c = self:_loadconf(co, c)