libs/cbi/luasrc/cbi.lua

   1 --[[
   2 LuCI - Configuration Bind Interface
   3
   4 Description:
   5 Offers an interface for binding configuration values to certain
   6 data types. Supports value and range validation and basic dependencies.
   7
   8 FileId:
   9 $Id$
  10
  11 License:
  12 Copyright 2008 Steven Barth <steven@midlink.org>
  13
  14 Licensed under the Apache License, Version 2.0 (the "License");
  15 you may not use this file except in compliance with the License.
  16 You may obtain a copy of the License at
  17
  18         http://www.apache.org/licenses/LICENSE-2.0
  19
  20 Unless required by applicable law or agreed to in writing, software
  21 distributed under the License is distributed on an "AS IS" BASIS,
  22 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  23 See the License for the specific language governing permissions and
  24 limitations under the License.
  25
  26 ]]--
  27 module("luci.cbi", package.seeall)
  28
  29 require("luci.template")
  30 local util = require("luci.util")
  31 require("luci.http")
  32 require("luci.uvl")
  33 require("luci.fs")
  34
  35 --local event      = require "luci.sys.event"
  36 local uci        = require("luci.model.uci")
  37 local class      = util.class
  38 local instanceof = util.instanceof
  39
  40 FORM_NODATA  =  0
  41 FORM_PROCEED =  0
  42 FORM_VALID   =  1
  43 FORM_INVALID = -1
  44 FORM_CHANGED =  2
  45
  46 AUTO = true
  47
  48 CREATE_PREFIX = "cbi.cts."
  49 REMOVE_PREFIX = "cbi.rts."
  50
  51 -- Loads a CBI map from given file, creating an environment and returns it
  52 function load(cbimap, ...)
  53         require("luci.fs")
  54         local i18n = require "luci.i18n"
  55         require("luci.config")
  56         require("luci.util")
  57
  58         local upldir = "/lib/uci/upload/"
  59         local cbidir = luci.util.libpath() .. "/model/cbi/"
  60
  61         assert(luci.fs.stat(cbimap) or luci.fs.stat(cbidir..cbimap..".lua"),
  62          "Model not found!")
  63
  64         local func, err = loadfile(cbimap)
  65         if not func then
  66                 func, err = loadfile(cbidir..cbimap..".lua")
  67         end
  68         assert(func, err)
  69
  70         luci.i18n.loadc("cbi")
  71         luci.i18n.loadc("uvl")
  72
  73         local env = {
  74                 translate=i18n.translate,
  75                 translatef=i18n.translatef,
  76                 arg={...}
  77         }
  78
  79         setfenv(func, setmetatable(env, {__index =
  80                 function(tbl, key)
  81                         return rawget(tbl, key) or _M[key] or _G[key]
  82                 end}))
  83
  84         local maps       = { func() }
  85         local uploads    = { }
  86         local has_upload = false
  87
  88         for i, map in ipairs(maps) do
  89                 if not instanceof(map, Node) then
  90                         error("CBI map returns no valid map object!")
  91                         return nil
  92                 else
  93                         map:prepare()
  94                         if map.upload_fields then
  95                                 has_upload = true
  96                                 for _, field in ipairs(map.upload_fields) do
  97                                         uploads[
  98                                                 field.config .. '.' ..
  99                                                 field.section.sectiontype .. '.' ..
 100                                                 field.option
 101                                         ] = true
 102                                 end
 103                         end
 104                 end
 105         end
 106
 107         if has_upload then
 108                 local uci = luci.model.uci.cursor()
 109                 local prm = luci.http.context.request.message.params
 110                 local fd, cbid
 111
 112                 luci.http.setfilehandler(
 113                         function( field, chunk, eof )
 114                                 if not field then return end
 115                                 if field.name and not cbid then
 116                                         local c, s, o = field.name:gmatch(
 117                                                 "cbid%.([^%.]+)%.([^%.]+)%.([^%.]+)"
 118                                         )()
 119
 120                                         if c and s and o then
 121                                                 local t = uci:get( c, s )
 122                                                 if t and uploads[c.."."..t.."."..o] then
 123                                                         local path = upldir .. field.name
 124                                                         fd = io.open(path, "w")
 125                                                         if fd then
 126                                                                 cbid = field.name
 127                                                                 prm[cbid] = path
 128                                                         end
 129                                                 end
 130                                         end
 131                                 end
 132
 133                                 if field.name == cbid and fd then
 134                                         fd:write(chunk)
 135                                 end
 136
 137                                 if eof and fd then
 138                                         fd:close()
 139                                         fd   = nil
 140                                         cbid = nil
 141                                 end
 142                         end
 143                 )
 144         end
 145
 146         return maps
 147 end
 148
 149 local function _uvl_validate_section(node, name)
 150         local co = node.map:get()
 151
 152         luci.uvl.STRICT_UNKNOWN_OPTIONS = false
 153         luci.uvl.STRICT_UNKNOWN_SECTIONS = false
 154
 155         local function tag_fields(e)
 156                 if e.option and node.fields[e.option] then
 157                         if node.fields[e.option].error then
 158                                 node.fields[e.option].error[name] = e
 159                         else
 160                                 node.fields[e.option].error = { [name] = e }
 161                         end
 162                 elseif e.childs then
 163                         for _, c in ipairs(e.childs) do tag_fields(c) end
 164                 end
 165         end
 166
 167         local function tag_section(e)
 168                 local s = { }
 169                 for _, c in ipairs(e.childs) do
 170                         if c.childs and not c:is(luci.uvl.errors.ERR_DEPENDENCY) then
 171                                 table.insert( s, c.childs[1]:string() )
 172                         else
 173                                 table.insert( s, c:string() )
 174                         end
 175                 end
 176                 if #s > 0 then
 177                         if node.error then
 178                                 node.error[name] = s
 179                         else
 180                                 node.error = { [name] = s }
 181                         end
 182                 end
 183         end
 184
 185         local stat, err = node.map.validator:validate_section(node.config, name, co)
 186         if err then
 187                 node.map.save = false
 188                 tag_fields(err)
 189                 tag_section(err)
 190         end
 191
 192 end
 193
 194 local function _uvl_strip_remote_dependencies(deps)
 195         local clean = {}
 196
 197         for k, v in pairs(deps) do
 198                 k = k:gsub("%$config%.%$section%.", "")
 199                 if k:match("^[%w_]+$") and type(v) == "string" then
 200                         clean[k] = v
 201                 end
 202         end
 203
 204         return clean
 205 end
 206
 207
 208 -- Node pseudo abstract class
 209 Node = class()
 210
 211 function Node.__init__(self, title, description)
 212         self.children = {}
 213         self.title = title or ""
 214         self.description = description or ""
 215         self.template = "cbi/node"
 216 end
 217
 218 -- i18n helper
 219 function Node._i18n(self, config, section, option, title, description)
 220
 221         -- i18n loaded?
 222         if type(luci.i18n) == "table" then
 223
 224                 local key = config and config:gsub("[^%w]+", "") or ""
 225
 226                 if section then key = key .. "_" .. section:lower():gsub("[^%w]+", "") end
 227                 if option  then key = key .. "_" .. tostring(option):lower():gsub("[^%w]+", "")  end
 228
 229                 self.title = title or luci.i18n.translate( key, option or section or config )
 230                 self.description = description or luci.i18n.translate( key .. "_desc", "" )
 231         end
 232 end
 233
 234 -- Prepare nodes
 235 function Node.prepare(self, ...)
 236         for k, child in ipairs(self.children) do
 237                 child:prepare(...)
 238         end
 239 end
 240
 241 -- Append child nodes
 242 function Node.append(self, obj)
 243         table.insert(self.children, obj)
 244 end
 245
 246 -- Parse this node and its children
 247 function Node.parse(self, ...)
 248         for k, child in ipairs(self.children) do
 249                 child:parse(...)
 250         end
 251 end
 252
 253 -- Render this node
 254 function Node.render(self, scope)
 255         scope = scope or {}
 256         scope.self = self
 257
 258         luci.template.render(self.template, scope)
 259 end
 260
 261 -- Render the children
 262 function Node.render_children(self, ...)
 263         for k, node in ipairs(self.children) do
 264                 node:render(...)
 265         end
 266 end
 267
 268
 269 --[[
 270 A simple template element
 271 ]]--
 272 Template = class(Node)
 273
 274 function Template.__init__(self, template)
 275         Node.__init__(self)
 276         self.template = template
 277 end
 278
 279 function Template.render(self)
 280         luci.template.render(self.template, {self=self})
 281 end
 282
 283
 284 --[[
 285 Map - A map describing a configuration file
 286 ]]--
 287 Map = class(Node)
 288
 289 function Map.__init__(self, config, ...)
 290         Node.__init__(self, ...)
 291         Node._i18n(self, config, nil, nil, ...)
 292
 293         self.config = config
 294         self.parsechain = {self.config}
 295         self.template = "cbi/map"
 296         self.apply_on_parse = nil
 297         self.readinput = true
 298
 299         self.uci = uci.cursor()
 300         self.save = true
 301
 302         self.changed = false
 303
 304         if not self.uci:load(self.config) then
 305                 error("Unable to read UCI data: " .. self.config)
 306         end
 307
 308         self.validator = luci.uvl.UVL()
 309         self.scheme = self.validator:get_scheme(self.config)
 310
 311 end
 312
 313 function Map.formvalue(self, key)
 314         return self.readinput and luci.http.formvalue(key)
 315 end
 316
 317 function Map.formvaluetable(self, key)
 318         return self.readinput and luci.http.formvaluetable(key)
 319 end
 320
 321 function Map.get_scheme(self, sectiontype, option)
 322         if not option then
 323                 return self.scheme and self.scheme.sections[sectiontype]
 324         else
 325                 return self.scheme and self.scheme.variables[sectiontype]
 326                  and self.scheme.variables[sectiontype][option]
 327         end
 328 end
 329
 330 function Map.submitstate(self)
 331         return self:formvalue("cbi.submit")
 332 end
 333
 334 -- Chain foreign config
 335 function Map.chain(self, config)
 336         table.insert(self.parsechain, config)
 337 end
 338
 339 function Map.state_handler(self, state)
 340         return state
 341 end
 342
 343 -- Use optimized UCI writing
 344 function Map.parse(self, readinput, ...)
 345         self.readinput = (readinput ~= false)
 346         Node.parse(self, ...)
 347
 348         if self.save then
 349                 for i, config in ipairs(self.parsechain) do
 350                         self.uci:save(config)
 351                 end
 352                 if self:submitstate() and (self.autoapply or luci.http.formvalue("cbi.apply")) then
 353                         for i, config in ipairs(self.parsechain) do
 354                                 self.uci:commit(config)
 355
 356                                 -- Refresh data because commit changes section names
 357                                 self.uci:load(config)
 358                         end
 359                         if self.apply_on_parse then
 360                                 self.uci:apply(self.parsechain)
 361                         else
 362                                 self._apply = function()
 363                                         local cmd = self.uci:apply(self.parsechain, true)
 364                                         return io.popen(cmd)
 365                                 end
 366                         end
 367
 368                         -- Reparse sections
 369                         Node.parse(self, true)
 370
 371                 end
 372                 for i, config in ipairs(self.parsechain) do
 373                         self.uci:unload(config)
 374                 end
 375                 if type(self.commit_handler) == "function" then
 376                         self:commit_handler(self:submitstate())
 377                 end
 378         end
 379
 380         if self:submitstate() then
 381                 if self.save then
 382                         self.state = self.changed and FORM_CHANGED or FORM_VALID
 383                 else
 384                         self.state = FORM_INVALID
 385                 end
 386         else
 387                 self.state = FORM_NODATA
 388         end
 389
 390         return self:state_handler(self.state)
 391 end
 392
 393 function Map.render(self, ...)
 394         Node.render(self, ...)
 395         if self._apply then
 396                 local fp = self._apply()
 397                 fp:read("*a")
 398                 fp:close()
 399         end
 400 end
 401
 402 -- Creates a child section
 403 function Map.section(self, class, ...)
 404         if instanceof(class, AbstractSection) then
 405                 local obj  = class(self, ...)
 406                 self:append(obj)
 407                 return obj
 408         else
 409                 error("class must be a descendent of AbstractSection")
 410         end
 411 end
 412
 413 -- UCI add
 414 function Map.add(self, sectiontype)
 415         return self.uci:add(self.config, sectiontype)
 416 end
 417
 418 -- UCI set
 419 function Map.set(self, section, option, value)
 420         if option then
 421                 return self.uci:set(self.config, section, option, value)
 422         else
 423                 return self.uci:set(self.config, section, value)
 424         end
 425 end
 426
 427 -- UCI del
 428 function Map.del(self, section, option)
 429         if option then
 430                 return self.uci:delete(self.config, section, option)
 431         else
 432                 return self.uci:delete(self.config, section)
 433         end
 434 end
 435
 436 -- UCI get
 437 function Map.get(self, section, option)
 438         if not section then
 439                 return self.uci:get_all(self.config)
 440         elseif option then
 441                 return self.uci:get(self.config, section, option)
 442         else
 443                 return self.uci:get_all(self.config, section)
 444         end
 445 end
 446
 447 --[[
 448 Compound - Container
 449 ]]--
 450 Compound = class(Node)
 451
 452 function Compound.__init__(self, ...)
 453         Node.__init__(self)
 454         self.children = {...}
 455 end
 456
 457 function Compound.parse(self, ...)
 458         local cstate, state = 0, 0
 459
 460         for k, child in ipairs(self.children) do
 461                 cstate = child:parse(...)
 462                 state = (not state or cstate < state) and cstate or state
 463         end
 464
 465         return state
 466 end
 467
 468
 469 --[[
 470 Delegator - Node controller
 471 ]]--
 472 Delegator = class(Node)
 473 function Delegator.__init__(self, ...)
 474         Node.__init__(self, ...)
 475         self.nodes = {}
 476         self.template = "cbi/delegator"
 477 end
 478
 479 function Delegator.state(self, name, node, transitor)
 480         transitor = transitor or self.transistor_linear
 481         local state = {node=node, name=name, transitor=transitor}
 482
 483         assert(instanceof(node, Node), "Invalid node")
 484         assert(not self.nodes[name], "Duplicate entry")
 485
 486         self.nodes[name] = state
 487         self:append(state)
 488
 489         return state
 490 end
 491
 492 function Delegator.get(self, name)
 493         return self.nodes[name]
 494 end
 495
 496 function Delegator.transistor_linear(self, state, cstate)
 497         if cstate > 0 then
 498                 for i, child in ipairs(self.children) do
 499                         if state == child then
 500                                 return self.children[i+1]
 501                         end
 502                 end
 503         else
 504                 return state
 505         end
 506 end
 507
 508 function Delegator.parse(self, ...)
 509         local active = self:getactive()
 510         assert(active, "Invalid state")
 511
 512         local cstate = active.node:parse()
 513         self.active = active.transistor(self, active.node, cstate)
 514
 515         if not self.active then
 516                 return FORM_DONE
 517         else
 518                 self.active:parse(false)
 519                 return FROM_PROCEED
 520         end
 521 end
 522
 523 function Delegator.render(self, ...)
 524         self.active.node:render(...)
 525 end
 526
 527 function Delegator.getactive(self)
 528         return self:get(Map.formvalue(self, "cbi.delegated")
 529                 or (self.children[1] and self.children[1].name))
 530 end
 531
 532 --[[
 533 Page - A simple node
 534 ]]--
 535
 536 Page = class(Node)
 537 Page.__init__ = Node.__init__
 538 Page.parse    = function() end
 539
 540
 541 --[[
 542 SimpleForm - A Simple non-UCI form
 543 ]]--
 544 SimpleForm = class(Node)
 545
 546 function SimpleForm.__init__(self, config, title, description, data)
 547         Node.__init__(self, title, description)
 548         self.config = config
 549         self.data = data or {}
 550         self.template = "cbi/simpleform"
 551         self.dorender = true
 552         self.pageaction = false
 553         self.readinput = true
 554 end
 555
 556 SimpleForm.formvalue = Map.formvalue
 557 SimpleForm.formvaluetable = Map.formvaluetable
 558
 559 function SimpleForm.parse(self, readinput, ...)
 560         self.readinput = (readinput ~= false)
 561         if self:submitstate() then
 562                 Node.parse(self, 1, ...)
 563         end
 564
 565         local valid = true
 566         for k, j in ipairs(self.children) do
 567                 for i, v in ipairs(j.children) do
 568                         valid = valid
 569                          and (not v.tag_missing or not v.tag_missing[1])
 570                          and (not v.tag_invalid or not v.tag_invalid[1])
 571                          and (not v.error)
 572                 end
 573         end
 574
 575         local state =
 576                 not self:submitstate() and FORM_NODATA
 577                 or valid and FORM_VALID
 578                 or FORM_INVALID
 579
 580         self.dorender = not self.handle or self:handle(state, self.data) ~= false
 581         return state
 582 end
 583
 584 function SimpleForm.render(self, ...)
 585         if self.dorender then
 586                 Node.render(self, ...)
 587         end
 588 end
 589
 590 function SimpleForm.submitstate(self)
 591         return self:formvalue("cbi.submit")
 592 end
 593
 594 function SimpleForm.section(self, class, ...)
 595         if instanceof(class, AbstractSection) then
 596                 local obj  = class(self, ...)
 597                 self:append(obj)
 598                 return obj
 599         else
 600                 error("class must be a descendent of AbstractSection")
 601         end
 602 end
 603
 604 -- Creates a child field
 605 function SimpleForm.field(self, class, ...)
 606         local section
 607         for k, v in ipairs(self.children) do
 608                 if instanceof(v, SimpleSection) then
 609                         section = v
 610                         break
 611                 end
 612         end
 613         if not section then
 614                 section = self:section(SimpleSection)
 615         end
 616
 617         if instanceof(class, AbstractValue) then
 618                 local obj  = class(self, section, ...)
 619                 obj.track_missing = true
 620                 section:append(obj)
 621                 return obj
 622         else
 623                 error("class must be a descendent of AbstractValue")
 624         end
 625 end
 626
 627 function SimpleForm.set(self, section, option, value)
 628         self.data[option] = value
 629 end
 630
 631
 632 function SimpleForm.del(self, section, option)
 633         self.data[option] = nil
 634 end
 635
 636
 637 function SimpleForm.get(self, section, option)
 638         return self.data[option]
 639 end
 640
 641
 642 function SimpleForm.get_scheme()
 643         return nil
 644 end
 645
 646
 647
 648 --[[
 649 AbstractSection
 650 ]]--
 651 AbstractSection = class(Node)
 652
 653 function AbstractSection.__init__(self, map, sectiontype, ...)
 654         Node.__init__(self, ...)
 655         self.sectiontype = sectiontype
 656         self.map = map
 657         self.config = map.config
 658         self.optionals = {}
 659         self.defaults = {}
 660         self.fields = {}
 661         self.tag_error = {}
 662         self.tag_invalid = {}
 663         self.tag_deperror = {}
 664         self.changed = false
 665
 666         self.optional = true
 667         self.addremove = false
 668         self.dynamic = false
 669 end
 670
 671 -- Appends a new option
 672 function AbstractSection.option(self, class, option, ...)
 673         -- Autodetect from UVL
 674         if class == true and self.map:get_scheme(self.sectiontype, option) then
 675                 local vs = self.map:get_scheme(self.sectiontype, option)
 676                 if vs.type == "boolean" then
 677                         class = Flag
 678                 elseif vs.type == "list" then
 679                         class = DynamicList
 680                 elseif vs.type == "enum" or vs.type == "reference" then
 681                         class = ListValue
 682                 else
 683                         class = Value
 684                 end
 685         end
 686
 687         if instanceof(class, AbstractValue) then
 688                 local obj  = class(self.map, self, option, ...)
 689
 690                 Node._i18n(obj, self.config, self.section or self.sectiontype, option, ...)
 691
 692                 self:append(obj)
 693                 self.fields[option] = obj
 694                 return obj
 695         elseif class == true then
 696                 error("No valid class was given and autodetection failed.")
 697         else
 698                 error("class must be a descendant of AbstractValue")
 699         end
 700 end
 701
 702 -- Parse optional options
 703 function AbstractSection.parse_optionals(self, section)
 704         if not self.optional then
 705                 return
 706         end
 707
 708         self.optionals[section] = {}
 709
 710         local field = self.map:formvalue("cbi.opt."..self.config.."."..section)
 711         for k,v in ipairs(self.children) do
 712                 if v.optional and not v:cfgvalue(section) then
 713                         if field == v.option then
 714                                 field = nil
 715                         else
 716                                 table.insert(self.optionals[section], v)
 717                         end
 718                 end
 719         end
 720
 721         if field and #field > 0 and self.dynamic then
 722                 self:add_dynamic(field)
 723         end
 724 end
 725
 726 -- Add a dynamic option
 727 function AbstractSection.add_dynamic(self, field, optional)
 728         local o = self:option(Value, field, field)
 729         o.optional = optional
 730 end
 731
 732 -- Parse all dynamic options
 733 function AbstractSection.parse_dynamic(self, section)
 734         if not self.dynamic then
 735                 return
 736         end
 737
 738         local arr  = luci.util.clone(self:cfgvalue(section))
 739         local form = self.map:formvaluetable("cbid."..self.config.."."..section)
 740         for k, v in pairs(form) do
 741                 arr[k] = v
 742         end
 743
 744         for key,val in pairs(arr) do
 745                 local create = true
 746
 747                 for i,c in ipairs(self.children) do
 748                         if c.option == key then
 749                                 create = false
 750                         end
 751                 end
 752
 753                 if create and key:sub(1, 1) ~= "." then
 754                         self:add_dynamic(key, true)
 755                 end
 756         end
 757 end
 758
 759 -- Returns the section's UCI table
 760 function AbstractSection.cfgvalue(self, section)
 761         return self.map:get(section)
 762 end
 763
 764 -- Push events
 765 function AbstractSection.push_events(self)
 766         --luci.util.append(self.map.events, self.events)
 767         self.map.changed = true
 768 end
 769
 770 -- Removes the section
 771 function AbstractSection.remove(self, section)
 772         self.map.autoapply = false
 773         return self.map:del(section)
 774 end
 775
 776 -- Creates the section
 777 function AbstractSection.create(self, section)
 778         local stat
 779
 780         if section then
 781                 stat = section:match("^%w+$") and self.map:set(section, nil, self.sectiontype)
 782         else
 783                 section = self.map:add(self.sectiontype)
 784                 stat = section
 785         end
 786
 787         if stat then
 788                 for k,v in pairs(self.children) do
 789                         if v.default then
 790                                 self.map:set(section, v.option, v.default)
 791                         end
 792                 end
 793
 794                 for k,v in pairs(self.defaults) do
 795                         self.map:set(section, k, v)
 796                 end
 797         end
 798
 799         self.map.autoapply = false
 800
 801         return stat
 802 end
 803
 804
 805 SimpleSection = class(AbstractSection)
 806
 807 function SimpleSection.__init__(self, form, ...)
 808         AbstractSection.__init__(self, form, nil, ...)
 809         self.template = "cbi/nullsection"
 810 end
 811
 812
 813 Table = class(AbstractSection)
 814
 815 function Table.__init__(self, form, data, ...)
 816         local datasource = {}
 817         datasource.config = "table"
 818         self.data = data
 819
 820         datasource.formvalue = Map.formvalue
 821         datasource.formvaluetable = Map.formvaluetable
 822         datasource.readinput = true
 823
 824         function datasource.get(self, section, option)
 825                 return data[section] and data[section][option]
 826         end
 827
 828         function datasource.submitstate(self)
 829                 return Map.formvalue(self, "cbi.submit")
 830         end
 831
 832         function datasource.del(...)
 833                 return true
 834         end
 835
 836         function datasource.get_scheme()
 837                 return nil
 838         end
 839
 840         AbstractSection.__init__(self, datasource, "table", ...)
 841         self.template = "cbi/tblsection"
 842         self.rowcolors = true
 843         self.anonymous = true
 844 end
 845
 846 function Table.parse(self, readinput)
 847         self.map.readinput = (readinput ~= false)
 848         for i, k in ipairs(self:cfgsections()) do
 849                 if self.map:submitstate() then
 850                         Node.parse(self, k)
 851                 end
 852         end
 853 end
 854
 855 function Table.cfgsections(self)
 856         local sections = {}
 857
 858         for i, v in luci.util.kspairs(self.data) do
 859                 table.insert(sections, i)
 860         end
 861
 862         return sections
 863 end
 864
 865
 866
 867 --[[
 868 NamedSection - A fixed configuration section defined by its name
 869 ]]--
 870 NamedSection = class(AbstractSection)
 871
 872 function NamedSection.__init__(self, map, section, stype, ...)
 873         AbstractSection.__init__(self, map, stype, ...)
 874         Node._i18n(self, map.config, section, nil, ...)
 875
 876         -- Defaults
 877         self.addremove = false
 878
 879         -- Use defaults from UVL
 880         if not self.override_scheme and self.map:get_scheme(self.sectiontype) then
 881                 local vs = self.map:get_scheme(self.sectiontype)
 882                 self.addremove = not vs.unique and not vs.required
 883                 self.dynamic   = vs.dynamic
 884                 self.title       = self.title or vs.title
 885                 self.description = self.description or vs.descr
 886         end
 887
 888         self.template = "cbi/nsection"
 889         self.section = section
 890 end
 891
 892 function NamedSection.parse(self, novld)
 893         local s = self.section
 894         local active = self:cfgvalue(s)
 895
 896         if self.addremove then
 897                 local path = self.config.."."..s
 898                 if active then -- Remove the section
 899                         if self.map:formvalue("cbi.rns."..path) and self:remove(s) then
 900                                 self:push_events()
 901                                 return
 902                         end
 903                 else           -- Create and apply default values
 904                         if self.map:formvalue("cbi.cns."..path) then
 905                                 self:create(s)
 906                                 return
 907                         end
 908                 end
 909         end
 910
 911         if active then
 912                 AbstractSection.parse_dynamic(self, s)
 913                 if self.map:submitstate() then
 914                         Node.parse(self, s)
 915
 916                         if not novld and not self.override_scheme and self.map.scheme then
 917                                 _uvl_validate_section(self, s)
 918                         end
 919                 end
 920                 AbstractSection.parse_optionals(self, s)
 921
 922                 if self.changed then
 923                         self:push_events()
 924                 end
 925         end
 926 end
 927
 928
 929 --[[
 930 TypedSection - A (set of) configuration section(s) defined by the type
 931         addremove:      Defines whether the user can add/remove sections of this type
 932         anonymous:  Allow creating anonymous sections
 933         validate:       a validation function returning nil if the section is invalid
 934 ]]--
 935 TypedSection = class(AbstractSection)
 936
 937 function TypedSection.__init__(self, map, type, ...)
 938         AbstractSection.__init__(self, map, type, ...)
 939         Node._i18n(self, map.config, type, nil, ...)
 940
 941         self.template  = "cbi/tsection"
 942         self.deps = {}
 943         self.anonymous = false
 944
 945         -- Use defaults from UVL
 946         if not self.override_scheme and self.map:get_scheme(self.sectiontype) then
 947                 local vs = self.map:get_scheme(self.sectiontype)
 948                 self.addremove = not vs.unique and not vs.required
 949                 self.dynamic   = vs.dynamic
 950                 self.anonymous = not vs.named
 951                 self.title       = self.title or vs.title
 952                 self.description = self.description or vs.descr
 953         end
 954 end
 955
 956 -- Return all matching UCI sections for this TypedSection
 957 function TypedSection.cfgsections(self)
 958         local sections = {}
 959         self.map.uci:foreach(self.map.config, self.sectiontype,
 960                 function (section)
 961                         if self:checkscope(section[".name"]) then
 962                                 table.insert(sections, section[".name"])
 963                         end
 964                 end)
 965
 966         return sections
 967 end
 968
 969 -- Limits scope to sections that have certain option => value pairs
 970 function TypedSection.depends(self, option, value)
 971         table.insert(self.deps, {option=option, value=value})
 972 end
 973
 974 function TypedSection.parse(self, novld)
 975         if self.addremove then
 976                 -- Remove
 977                 local crval = REMOVE_PREFIX .. self.config
 978                 local name = self.map:formvaluetable(crval)
 979                 for k,v in pairs(name) do
 980                         if k:sub(-2) == ".x" then
 981                                 k = k:sub(1, #k - 2)
 982                         end
 983                         if self:cfgvalue(k) and self:checkscope(k) then
 984                                 self:remove(k)
 985                         end
 986                 end
 987         end
 988
 989         local co
 990         for i, k in ipairs(self:cfgsections()) do
 991                 AbstractSection.parse_dynamic(self, k)
 992                 if self.map:submitstate() then
 993                         Node.parse(self, k, novld)
 994
 995                         if not novld and not self.override_scheme and self.map.scheme then
 996                                 _uvl_validate_section(self, k)
 997                         end
 998                 end
 999                 AbstractSection.parse_optionals(self, k)
1000         end
1001
1002         if self.addremove then
1003                 -- Create
1004                 local created
1005                 local crval = CREATE_PREFIX .. self.config .. "." .. self.sectiontype
1006                 local name  = self.map:formvalue(crval)
1007                 if self.anonymous then
1008                         if name then
1009                                 created = self:create()
1010                         end
1011                 else
1012                         if name then
1013                                 -- Ignore if it already exists
1014                                 if self:cfgvalue(name) then
1015                                         name = nil;
1016                                 end
1017
1018                                 name = self:checkscope(name)
1019
1020                                 if not name then
1021                                         self.err_invalid = true
1022                                 end
1023
1024                                 if name and #name > 0 then
1025                                         created = self:create(name) and name
1026                                         if not created then
1027                                                 self.invalid_cts = true
1028                                         end
1029                                 end
1030                         end
1031                 end
1032
1033                 if created then
1034                         AbstractSection.parse_optionals(self, created)
1035                 end
1036         end
1037
1038         if created or self.changed then
1039                 self:push_events()
1040         end
1041 end
1042
1043 -- Verifies scope of sections
1044 function TypedSection.checkscope(self, section)
1045         -- Check if we are not excluded
1046         if self.filter and not self:filter(section) then
1047                 return nil
1048         end
1049
1050         -- Check if at least one dependency is met
1051         if #self.deps > 0 and self:cfgvalue(section) then
1052                 local stat = false
1053
1054                 for k, v in ipairs(self.deps) do
1055                         if self:cfgvalue(section)[v.option] == v.value then
1056                                 stat = true
1057                         end
1058                 end
1059
1060                 if not stat then
1061                         return nil
1062                 end
1063         end
1064
1065         return self:validate(section)
1066 end
1067
1068
1069 -- Dummy validate function
1070 function TypedSection.validate(self, section)
1071         return section
1072 end
1073
1074
1075 --[[
1076 AbstractValue - An abstract Value Type
1077         null:           Value can be empty
1078         valid:          A function returning the value if it is valid otherwise nil
1079         depends:        A table of option => value pairs of which one must be true
1080         default:        The default value
1081         size:           The size of the input fields
1082         rmempty:        Unset value if empty
1083         optional:       This value is optional (see AbstractSection.optionals)
1084 ]]--
1085 AbstractValue = class(Node)
1086
1087 function AbstractValue.__init__(self, map, section, option, ...)
1088         Node.__init__(self, ...)
1089         self.section = section
1090         self.option  = option
1091         self.map     = map
1092         self.config  = map.config
1093         self.tag_invalid = {}
1094         self.tag_missing = {}
1095         self.tag_reqerror = {}
1096         self.tag_error = {}
1097         self.deps = {}
1098         --self.cast = "string"
1099
1100         self.track_missing = false
1101         self.rmempty   = true
1102         self.default   = nil
1103         self.size      = nil
1104         self.optional  = false
1105 end
1106
1107 function AbstractValue.prepare(self)
1108         -- Use defaults from UVL
1109         if not self.override_scheme
1110          and self.map:get_scheme(self.section.sectiontype, self.option) then
1111                 local vs = self.map:get_scheme(self.section.sectiontype, self.option)
1112                 if self.cast == nil then
1113                         self.cast = (vs.type == "list") and "list" or "string"
1114                 end
1115                 self.title       = self.title or vs.title
1116                 self.description = self.description or vs.descr
1117                 if self.default == nil then
1118                         self.default = vs.default
1119                 end
1120
1121                 if vs.depends and not self.override_dependencies then
1122                         for i, deps in ipairs(vs.depends) do
1123                                 deps = _uvl_strip_remote_dependencies(deps)
1124                                 if next(deps) then
1125                                         self:depends(deps)
1126                                 end
1127                         end
1128                 end
1129         end
1130
1131         self.cast = self.cast or "string"
1132 end
1133
1134 -- Add a dependencie to another section field
1135 function AbstractValue.depends(self, field, value)
1136         local deps
1137         if type(field) == "string" then
1138                 deps = {}
1139                 deps[field] = value
1140         else
1141                 deps = field
1142         end
1143
1144         table.insert(self.deps, {deps=deps, add=""})
1145 end
1146
1147 -- Generates the unique CBID
1148 function AbstractValue.cbid(self, section)
1149         return "cbid."..self.map.config.."."..section.."."..self.option
1150 end
1151
1152 -- Return whether this object should be created
1153 function AbstractValue.formcreated(self, section)
1154         local key = "cbi.opt."..self.config.."."..section
1155         return (self.map:formvalue(key) == self.option)
1156 end
1157
1158 -- Returns the formvalue for this object
1159 function AbstractValue.formvalue(self, section)
1160         return self.map:formvalue(self:cbid(section))
1161 end
1162
1163 function AbstractValue.additional(self, value)
1164         self.optional = value
1165 end
1166
1167 function AbstractValue.mandatory(self, value)
1168         self.rmempty = not value
1169 end
1170
1171 function AbstractValue.parse(self, section, novld)
1172         local fvalue = self:formvalue(section)
1173         local cvalue = self:cfgvalue(section)
1174
1175         if fvalue and #fvalue > 0 then -- If we have a form value, write it to UCI
1176                 fvalue = self:transform(self:validate(fvalue, section))
1177                 if not fvalue and not novld then
1178                         if self.error then
1179                                 self.error[section] = "invalid"
1180                         else
1181                                 self.error = { [section] = "invalid" }
1182                         end
1183                         self.map.save = false
1184                 end
1185                 if fvalue and not (fvalue == cvalue) then
1186                         if self:write(section, fvalue) then
1187                                 -- Push events
1188                                 self.section.changed = true
1189                                 --luci.util.append(self.map.events, self.events)
1190                         end
1191                 end
1192         else                                                    -- Unset the UCI or error
1193                 if self.rmempty or self.optional then
1194                         if self:remove(section) then
1195                                 -- Push events
1196                                 self.section.changed = true
1197                                 --luci.util.append(self.map.events, self.events)
1198                         end
1199                 elseif cvalue ~= fvalue and not novld then
1200                         self:write(section, fvalue or "")
1201                         if self.error then
1202                                 self.error[section] = "missing"
1203                         else
1204                                 self.error = { [section] = "missing" }
1205                         end
1206                         self.map.save = false
1207                 end
1208         end
1209 end
1210
1211 -- Render if this value exists or if it is mandatory
1212 function AbstractValue.render(self, s, scope)
1213         if not self.optional or self:cfgvalue(s) or self:formcreated(s) then
1214                 scope = scope or {}
1215                 scope.section   = s
1216                 scope.cbid      = self:cbid(s)
1217                 scope.striptags = luci.util.striptags
1218
1219                 scope.ifattr = function(cond,key,val)
1220                         if cond then
1221                                 return string.format(
1222                                         ' %s="%s"', tostring(key),
1223                                         luci.util.pcdata(tostring( val
1224                                          or scope[key]
1225                                          or (type(self[key]) ~= "function" and self[key])
1226                                          or "" ))
1227                                 )
1228                         else
1229                                 return ''
1230                         end
1231                 end
1232
1233                 scope.attr = function(...)
1234                         return scope.ifattr( true, ... )
1235                 end
1236
1237                 Node.render(self, scope)
1238         end
1239 end
1240
1241 -- Return the UCI value of this object
1242 function AbstractValue.cfgvalue(self, section)
1243         local value = self.map:get(section, self.option)
1244         if not value then
1245                 return nil
1246         elseif not self.cast or self.cast == type(value) then
1247                 return value
1248         elseif self.cast == "string" then
1249                 if type(value) == "table" then
1250                         return value[1]
1251                 end
1252         elseif self.cast == "table" then
1253                 return luci.util.split(value, "%s+", nil, true)
1254         end
1255 end
1256
1257 -- Validate the form value
1258 function AbstractValue.validate(self, value)
1259         return value
1260 end
1261
1262 AbstractValue.transform = AbstractValue.validate
1263
1264
1265 -- Write to UCI
1266 function AbstractValue.write(self, section, value)
1267         return self.map:set(section, self.option, value)
1268 end
1269
1270 -- Remove from UCI
1271 function AbstractValue.remove(self, section)
1272         return self.map:del(section, self.option)
1273 end
1274
1275
1276
1277
1278 --[[
1279 Value - A one-line value
1280         maxlength:      The maximum length
1281 ]]--
1282 Value = class(AbstractValue)
1283
1284 function Value.__init__(self, ...)
1285         AbstractValue.__init__(self, ...)
1286         self.template  = "cbi/value"
1287         self.keylist = {}
1288         self.vallist = {}
1289 end
1290
1291 function Value.value(self, key, val)
1292         val = val or key
1293         table.insert(self.keylist, tostring(key))
1294         table.insert(self.vallist, tostring(val))
1295 end
1296
1297
1298 -- DummyValue - This does nothing except being there
1299 DummyValue = class(AbstractValue)
1300
1301 function DummyValue.__init__(self, ...)
1302         AbstractValue.__init__(self, ...)
1303         self.template = "cbi/dvalue"
1304         self.value = nil
1305 end
1306
1307 function DummyValue.cfgvalue(self, section)
1308         local value
1309         if self.value then
1310                 if type(self.value) == "function" then
1311                         value = self:value(section)
1312                 else
1313                         value = self.value
1314                 end
1315         else
1316                 value = AbstractValue.cfgvalue(self, section)
1317         end
1318         return value
1319 end
1320
1321 function DummyValue.parse(self)
1322
1323 end
1324
1325
1326 --[[
1327 Flag - A flag being enabled or disabled
1328 ]]--
1329 Flag = class(AbstractValue)
1330
1331 function Flag.__init__(self, ...)
1332         AbstractValue.__init__(self, ...)
1333         self.template  = "cbi/fvalue"
1334
1335         self.enabled = "1"
1336         self.disabled = "0"
1337 end
1338
1339 -- A flag can only have two states: set or unset
1340 function Flag.parse(self, section)
1341         local fvalue = self:formvalue(section)
1342
1343         if fvalue then
1344                 fvalue = self.enabled
1345         else
1346                 fvalue = self.disabled
1347         end
1348
1349         if fvalue == self.enabled or (not self.optional and not self.rmempty) then
1350                 if not(fvalue == self:cfgvalue(section)) then
1351                         self:write(section, fvalue)
1352                 end
1353         else
1354                 self:remove(section)
1355         end
1356 end
1357
1358
1359
1360 --[[
1361 ListValue - A one-line value predefined in a list
1362         widget: The widget that will be used (select, radio)
1363 ]]--
1364 ListValue = class(AbstractValue)
1365
1366 function ListValue.__init__(self, ...)
1367         AbstractValue.__init__(self, ...)
1368         self.template  = "cbi/lvalue"
1369
1370         self.keylist = {}
1371         self.vallist = {}
1372         self.size   = 1
1373         self.widget = "select"
1374 end
1375
1376 function ListValue.prepare(self, ...)
1377         AbstractValue.prepare(self, ...)
1378         if not self.override_scheme
1379          and self.map:get_scheme(self.section.sectiontype, self.option) then
1380                 local vs = self.map:get_scheme(self.section.sectiontype, self.option)
1381                 if self.value and vs.valuelist and not self.override_values then
1382                         for k, v in ipairs(vs.valuelist) do
1383                                 local deps = {}
1384                                 if not self.override_dependencies
1385                                  and vs.enum_depends and vs.enum_depends[v.value] then
1386                                         for i, dep in ipairs(vs.enum_depends[v.value]) do
1387                                                 table.insert(deps, _uvl_strip_remote_dependencies(dep))
1388                                         end
1389                                 end
1390                                 self:value(v.value, v.title or v.value, unpack(deps))
1391                         end
1392                 end
1393         end
1394 end
1395
1396 function ListValue.value(self, key, val, ...)
1397         if luci.util.contains(self.keylist, key) then
1398                 return
1399         end
1400
1401         val = val or key
1402         table.insert(self.keylist, tostring(key))
1403         table.insert(self.vallist, tostring(val))
1404
1405         for i, deps in ipairs({...}) do
1406                 table.insert(self.deps, {add = "-"..key, deps=deps})
1407         end
1408 end
1409
1410 function ListValue.validate(self, val)
1411         if luci.util.contains(self.keylist, val) then
1412                 return val
1413         else
1414                 return nil
1415         end
1416 end
1417
1418
1419
1420 --[[
1421 MultiValue - Multiple delimited values
1422         widget: The widget that will be used (select, checkbox)
1423         delimiter: The delimiter that will separate the values (default: " ")
1424 ]]--
1425 MultiValue = class(AbstractValue)
1426
1427 function MultiValue.__init__(self, ...)
1428         AbstractValue.__init__(self, ...)
1429         self.template = "cbi/mvalue"
1430
1431         self.keylist = {}
1432         self.vallist = {}
1433
1434         self.widget = "checkbox"
1435         self.delimiter = " "
1436 end
1437
1438 function MultiValue.render(self, ...)
1439         if self.widget == "select" and not self.size then
1440                 self.size = #self.vallist
1441         end
1442
1443         AbstractValue.render(self, ...)
1444 end
1445
1446 function MultiValue.value(self, key, val)
1447         if luci.util.contains(self.keylist, key) then
1448                 return
1449         end
1450
1451         val = val or key
1452         table.insert(self.keylist, tostring(key))
1453         table.insert(self.vallist, tostring(val))
1454 end
1455
1456 function MultiValue.valuelist(self, section)
1457         local val = self:cfgvalue(section)
1458
1459         if not(type(val) == "string") then
1460                 return {}
1461         end
1462
1463         return luci.util.split(val, self.delimiter)
1464 end
1465
1466 function MultiValue.validate(self, val)
1467         val = (type(val) == "table") and val or {val}
1468
1469         local result
1470
1471         for i, value in ipairs(val) do
1472                 if luci.util.contains(self.keylist, value) then
1473                         result = result and (result .. self.delimiter .. value) or value
1474                 end
1475         end
1476
1477         return result
1478 end
1479
1480
1481 StaticList = class(MultiValue)
1482
1483 function StaticList.__init__(self, ...)
1484         MultiValue.__init__(self, ...)
1485         self.cast = "table"
1486         self.valuelist = self.cfgvalue
1487
1488         if not self.override_scheme
1489          and self.map:get_scheme(self.section.sectiontype, self.option) then
1490                 local vs = self.map:get_scheme(self.section.sectiontype, self.option)
1491                 if self.value and vs.values and not self.override_values then
1492                         for k, v in pairs(vs.values) do
1493                                 self:value(k, v)
1494                         end
1495                 end
1496         end
1497 end
1498
1499 function StaticList.validate(self, value)
1500         value = (type(value) == "table") and value or {value}
1501
1502         local valid = {}
1503         for i, v in ipairs(value) do
1504                 if luci.util.contains(self.vallist, v) then
1505                         table.insert(valid, v)
1506                 end
1507         end
1508         return valid
1509 end
1510
1511
1512 DynamicList = class(AbstractValue)
1513
1514 function DynamicList.__init__(self, ...)
1515         AbstractValue.__init__(self, ...)
1516         self.template  = "cbi/dynlist"
1517         self.cast = "table"
1518         self.keylist = {}
1519         self.vallist = {}
1520 end
1521
1522 function DynamicList.value(self, key, val)
1523         val = val or key
1524         table.insert(self.keylist, tostring(key))
1525         table.insert(self.vallist, tostring(val))
1526 end
1527
1528 function DynamicList.formvalue(self, section)
1529         local value = AbstractValue.formvalue(self, section)
1530         value = (type(value) == "table") and value or {value}
1531
1532         local valid = {}
1533         for i, v in ipairs(value) do
1534                 if v and #v > 0
1535                  and not self.map:formvalue("cbi.rle."..section.."."..self.option.."."..i)
1536                  and not self.map:formvalue("cbi.rle."..section.."."..self.option.."."..i..".x") then
1537                         table.insert(valid, v)
1538                 end
1539         end
1540
1541         return valid
1542 end
1543
1544
1545 --[[
1546 TextValue - A multi-line value
1547         rows:   Rows
1548 ]]--
1549 TextValue = class(AbstractValue)
1550
1551 function TextValue.__init__(self, ...)
1552         AbstractValue.__init__(self, ...)
1553         self.template  = "cbi/tvalue"
1554 end
1555
1556 --[[
1557 Button
1558 ]]--
1559 Button = class(AbstractValue)
1560
1561 function Button.__init__(self, ...)
1562         AbstractValue.__init__(self, ...)
1563         self.template  = "cbi/button"
1564         self.inputstyle = nil
1565         self.rmempty = true
1566 end
1567
1568
1569 FileUpload = class(AbstractValue)
1570
1571 function FileUpload.__init__(self, ...)
1572         AbstractValue.__init__(self, ...)
1573         self.template = "cbi/upload"
1574         if not self.map.upload_fields then
1575                 self.map.upload_fields = { self }
1576         else
1577                 self.map.upload_fields[#self.map.upload_fields+1] = self
1578         end
1579 end
1580
1581 function FileUpload.formcreated(self, section)
1582         return AbstractValue.formcreated(self, section) or
1583                 self.map:formvalue("cbi.rlf."..section.."."..self.option) or
1584                 self.map:formvalue("cbi.rlf."..section.."."..self.option..".x")
1585 end
1586
1587 function FileUpload.cfgvalue(self, section)
1588         local val = AbstractValue.cfgvalue(self, section)
1589         if val and luci.fs.access(val) then
1590                 return val
1591         end
1592         return nil
1593 end
1594
1595 function FileUpload.formvalue(self, section)
1596         local val = AbstractValue.formvalue(self, section)
1597         if val then
1598                 if not self.map:formvalue("cbi.rlf."..section.."."..self.option) and
1599                    not self.map:formvalue("cbi.rlf."..section.."."..self.option..".x")
1600                 then
1601                         return val
1602                 end
1603                 luci.fs.unlink(val)
1604                 self.value = nil
1605         end
1606         return nil
1607 end
1608
1609 function FileUpload.remove(self, section)
1610         local val = AbstractValue.formvalue(self, section)
1611         if val and luci.fs.access(val) then luci.fs.unlink(val) end
1612         return AbstractValue.remove(self, section)
1613 end
1614
1615
1616 FileBrowser = class(AbstractValue)
1617
1618 function FileBrowser.__init__(self, ...)
1619         AbstractValue.__init__(self, ...)
1620         self.template = "cbi/browser"
1621 end