modules/luci-base/luasrc/cbi.lua

   1 -- Copyright 2008 Steven Barth <steven@midlink.org>
   2 -- Licensed to the public under the Apache License 2.0.
   3
   4 module("luci.cbi", package.seeall)
   5
   6 require("luci.template")
   7 local util = require("luci.util")
   8 require("luci.http")
   9
  10
  11 --local event      = require "luci.sys.event"
  12 local fs         = require("nixio.fs")
  13 local uci        = require("luci.model.uci")
  14 local datatypes  = require("luci.cbi.datatypes")
  15 local dispatcher = require("luci.dispatcher")
  16 local class      = util.class
  17 local instanceof = util.instanceof
  18
  19 FORM_NODATA  =  0
  20 FORM_PROCEED =  0
  21 FORM_VALID   =  1
  22 FORM_DONE        =  1
  23 FORM_INVALID = -1
  24 FORM_CHANGED =  2
  25 FORM_SKIP    =  4
  26
  27 AUTO = true
  28
  29 CREATE_PREFIX = "cbi.cts."
  30 REMOVE_PREFIX = "cbi.rts."
  31 RESORT_PREFIX = "cbi.sts."
  32 FEXIST_PREFIX = "cbi.cbe."
  33
  34 -- Loads a CBI map from given file, creating an environment and returns it
  35 function load(cbimap, ...)
  36         local fs   = require "nixio.fs"
  37         local i18n = require "luci.i18n"
  38         require("luci.config")
  39         require("luci.util")
  40
  41         local upldir = "/etc/luci-uploads/"
  42         local cbidir = luci.util.libpath() .. "/model/cbi/"
  43         local func, err
  44
  45         if fs.access(cbidir..cbimap..".lua") then
  46                 func, err = loadfile(cbidir..cbimap..".lua")
  47         elseif fs.access(cbimap) then
  48                 func, err = loadfile(cbimap)
  49         else
  50                 func, err = nil, "Model '" .. cbimap .. "' not found!"
  51         end
  52
  53         assert(func, err)
  54
  55         local env = {
  56                 translate=i18n.translate,
  57                 translatef=i18n.translatef,
  58                 arg={...}
  59         }
  60
  61         setfenv(func, setmetatable(env, {__index =
  62                 function(tbl, key)
  63                         return rawget(tbl, key) or _M[key] or _G[key]
  64                 end}))
  65
  66         local maps       = { func() }
  67         local uploads    = { }
  68         local has_upload = false
  69
  70         for i, map in ipairs(maps) do
  71                 if not instanceof(map, Node) then
  72                         error("CBI map returns no valid map object!")
  73                         return nil
  74                 else
  75                         map:prepare()
  76                         if map.upload_fields then
  77                                 has_upload = true
  78                                 for _, field in ipairs(map.upload_fields) do
  79                                         uploads[
  80                                                 field.config .. '.' ..
  81                                                 (field.section.sectiontype or '1') .. '.' ..
  82                                                 field.option
  83                                         ] = true
  84                                 end
  85                         end
  86                 end
  87         end
  88
  89         if has_upload then
  90                 local uci = luci.model.uci.cursor()
  91                 local prm = luci.http.context.request.message.params
  92                 local fd, cbid
  93
  94                 luci.http.setfilehandler(
  95                         function( field, chunk, eof )
  96                                 if not field then return end
  97                                 if field.name and not cbid then
  98                                         local c, s, o = field.name:gmatch(
  99                                                 "cbid%.([^%.]+)%.([^%.]+)%.([^%.]+)"
 100                                         )()
 101
 102                                         if c and s and o then
 103                                                 local t = uci:get( c, s ) or s
 104                                                 if uploads[c.."."..t.."."..o] then
 105                                                         local path = upldir .. field.name
 106                                                         fd = io.open(path, "w")
 107                                                         if fd then
 108                                                                 cbid = field.name
 109                                                                 prm[cbid] = path
 110                                                         end
 111                                                 end
 112                                         end
 113                                 end
 114
 115                                 if field.name == cbid and fd then
 116                                         fd:write(chunk)
 117                                 end
 118
 119                                 if eof and fd then
 120                                         fd:close()
 121                                         fd   = nil
 122                                         cbid = nil
 123                                 end
 124                         end
 125                 )
 126         end
 127
 128         return maps
 129 end
 130
 131 --
 132 -- Compile a datatype specification into a parse tree for evaluation later on
 133 --
 134 local cdt_cache = { }
 135
 136 function compile_datatype(code)
 137         local i
 138         local pos = 0
 139         local esc = false
 140         local depth = 0
 141         local stack = { }
 142
 143         for i = 1, #code+1 do
 144                 local byte = code:byte(i) or 44
 145                 if esc then
 146                         esc = false
 147                 elseif byte == 92 then
 148                         esc = true
 149                 elseif byte == 40 or byte == 44 then
 150                         if depth <= 0 then
 151                                 if pos < i then
 152                                         local label = code:sub(pos, i-1)
 153                                                 :gsub("\\(.)", "%1")
 154                                                 :gsub("^%s+", "")
 155                                                 :gsub("%s+$", "")
 156
 157                                         if #label > 0 and tonumber(label) then
 158                                                 stack[#stack+1] = tonumber(label)
 159                                         elseif label:match("^'.*'$") or label:match('^".*"$') then
 160                                                 stack[#stack+1] = label:gsub("[\"'](.*)[\"']", "%1")
 161                                         elseif type(datatypes[label]) == "function" then
 162                                                 stack[#stack+1] = datatypes[label]
 163                                                 stack[#stack+1] = { }
 164                                         else
 165                                                 error("Datatype error, bad token %q" % label)
 166                                         end
 167                                 end
 168                                 pos = i + 1
 169                         end
 170                         depth = depth + (byte == 40 and 1 or 0)
 171                 elseif byte == 41 then
 172                         depth = depth - 1
 173                         if depth <= 0 then
 174                                 if type(stack[#stack-1]) ~= "function" then
 175                                         error("Datatype error, argument list follows non-function")
 176                                 end
 177                                 stack[#stack] = compile_datatype(code:sub(pos, i-1))
 178                                 pos = i + 1
 179                         end
 180                 end
 181         end
 182
 183         return stack
 184 end
 185
 186 function verify_datatype(dt, value)
 187         if dt and #dt > 0 then
 188                 if not cdt_cache[dt] then
 189                         local c = compile_datatype(dt)
 190                         if c and type(c[1]) == "function" then
 191                                 cdt_cache[dt] = c
 192                         else
 193                                 error("Datatype error, not a function expression")
 194                         end
 195                 end
 196                 if cdt_cache[dt] then
 197                         return cdt_cache[dt][1](value, unpack(cdt_cache[dt][2]))
 198                 end
 199         end
 200         return true
 201 end
 202
 203
 204 -- Node pseudo abstract class
 205 Node = class()
 206
 207 function Node.__init__(self, title, description)
 208         self.children = {}
 209         self.title = title or ""
 210         self.description = description or ""
 211         self.template = "cbi/node"
 212 end
 213
 214 -- hook helper
 215 function Node._run_hook(self, hook)
 216         if type(self[hook]) == "function" then
 217                 return self[hook](self)
 218         end
 219 end
 220
 221 function Node._run_hooks(self, ...)
 222         local f
 223         local r = false
 224         for _, f in ipairs(arg) do
 225                 if type(self[f]) == "function" then
 226                         self[f](self)
 227                         r = true
 228                 end
 229         end
 230         return r
 231 end
 232
 233 -- Prepare nodes
 234 function Node.prepare(self, ...)
 235         for k, child in ipairs(self.children) do
 236                 child:prepare(...)
 237         end
 238 end
 239
 240 -- Append child nodes
 241 function Node.append(self, obj)
 242         table.insert(self.children, obj)
 243 end
 244
 245 -- Parse this node and its children
 246 function Node.parse(self, ...)
 247         for k, child in ipairs(self.children) do
 248                 child:parse(...)
 249         end
 250 end
 251
 252 -- Render this node
 253 function Node.render(self, scope)
 254         scope = scope or {}
 255         scope.self = self
 256
 257         luci.template.render(self.template, scope)
 258 end
 259
 260 -- Render the children
 261 function Node.render_children(self, ...)
 262         local k, node
 263         for k, node in ipairs(self.children) do
 264                 node.last_child = (k == #self.children)
 265                 node.index = k
 266                 node:render(...)
 267         end
 268 end
 269
 270
 271 --[[
 272 A simple template element
 273 ]]--
 274 Template = class(Node)
 275
 276 function Template.__init__(self, template)
 277         Node.__init__(self)
 278         self.template = template
 279 end
 280
 281 function Template.render(self)
 282         luci.template.render(self.template, {self=self})
 283 end
 284
 285 function Template.parse(self, readinput)
 286         self.readinput = (readinput ~= false)
 287         return Map.formvalue(self, "cbi.submit") and FORM_DONE or FORM_NODATA
 288 end
 289
 290
 291 --[[
 292 Map - A map describing a configuration file
 293 ]]--
 294 Map = class(Node)
 295
 296 function Map.__init__(self, config, ...)
 297         Node.__init__(self, ...)
 298
 299         self.config = config
 300         self.parsechain = {self.config}
 301         self.template = "cbi/map"
 302         self.apply_on_parse = nil
 303         self.readinput = true
 304         self.proceed = false
 305         self.flow = {}
 306
 307         self.uci = uci.cursor()
 308         self.save = true
 309
 310         self.changed = false
 311
 312         local path = "%s/%s" %{ self.uci:get_confdir(), self.config }
 313         if fs.stat(path, "type") ~= "reg" then
 314                 fs.writefile(path, "")
 315         end
 316
 317         local ok, err = self.uci:load(self.config)
 318         if not ok then
 319                 local url = dispatcher.build_url(unpack(dispatcher.context.request))
 320                 local source = self:formvalue("cbi.source")
 321                 if type(source) == "string" then
 322                         fs.writefile(path, source:gsub("\r\n", "\n"))
 323                         ok, err = self.uci:load(self.config)
 324                         if ok then
 325                                 luci.http.redirect(url)
 326                         end
 327                 end
 328                 self.save = false
 329         end
 330
 331         if not ok then
 332                 self.template   = "cbi/error"
 333                 self.error      = err
 334                 self.source     = fs.readfile(path) or ""
 335                 self.pageaction = false
 336         end
 337 end
 338
 339 function Map.formvalue(self, key)
 340         return self.readinput and luci.http.formvalue(key) or nil
 341 end
 342
 343 function Map.formvaluetable(self, key)
 344         return self.readinput and luci.http.formvaluetable(key) or {}
 345 end
 346
 347 function Map.get_scheme(self, sectiontype, option)
 348         if not option then
 349                 return self.scheme and self.scheme.sections[sectiontype]
 350         else
 351                 return self.scheme and self.scheme.variables[sectiontype]
 352                  and self.scheme.variables[sectiontype][option]
 353         end
 354 end
 355
 356 function Map.submitstate(self)
 357         return self:formvalue("cbi.submit")
 358 end
 359
 360 -- Chain foreign config
 361 function Map.chain(self, config)
 362         table.insert(self.parsechain, config)
 363 end
 364
 365 function Map.state_handler(self, state)
 366         return state
 367 end
 368
 369 -- Use optimized UCI writing
 370 function Map.parse(self, readinput, ...)
 371         if self:formvalue("cbi.skip") then
 372                 self.state = FORM_SKIP
 373         elseif not self.save then
 374                 self.state = FORM_INVALID
 375         elseif not self:submitstate() then
 376                 self.state = FORM_NODATA
 377         end
 378
 379         -- Back out early to prevent unauthorized changes on the subsequent parse
 380         if self.state ~= nil then
 381                 return self:state_handler(self.state)
 382         end
 383
 384         self.readinput = (readinput ~= false)
 385         self:_run_hooks("on_parse")
 386
 387         Node.parse(self, ...)
 388
 389         if self.save then
 390                 self:_run_hooks("on_save", "on_before_save")
 391                 for i, config in ipairs(self.parsechain) do
 392                         self.uci:save(config)
 393                 end
 394                 self:_run_hooks("on_after_save")
 395                 if (not self.proceed and self.flow.autoapply) or luci.http.formvalue("cbi.apply") then
 396                         self:_run_hooks("on_before_commit")
 397                         for i, config in ipairs(self.parsechain) do
 398                                 self.uci:commit(config)
 399
 400                                 -- Refresh data because commit changes section names
 401                                 self.uci:load(config)
 402                         end
 403                         self:_run_hooks("on_commit", "on_after_commit", "on_before_apply")
 404                         if self.apply_on_parse then
 405                                 self.uci:apply(self.parsechain)
 406                                 self:_run_hooks("on_apply", "on_after_apply")
 407                         else
 408                                 -- This is evaluated by the dispatcher and delegated to the
 409                                 -- template which in turn fires XHR to perform the actual
 410                                 -- apply actions.
 411                                 self.apply_needed = true
 412                         end
 413
 414                         -- Reparse sections
 415                         Node.parse(self, true)
 416                 end
 417                 for i, config in ipairs(self.parsechain) do
 418                         self.uci:unload(config)
 419                 end
 420                 if type(self.commit_handler) == "function" then
 421                         self:commit_handler(self:submitstate())
 422                 end
 423         end
 424
 425         if not self.save then
 426                 self.state = FORM_INVALID
 427         elseif self.proceed then
 428                 self.state = FORM_PROCEED
 429         elseif self.changed then
 430                 self.state = FORM_CHANGED
 431         else
 432                 self.state = FORM_VALID
 433         end
 434
 435         return self:state_handler(self.state)
 436 end
 437
 438 function Map.render(self, ...)
 439         self:_run_hooks("on_init")
 440         Node.render(self, ...)
 441 end
 442
 443 -- Creates a child section
 444 function Map.section(self, class, ...)
 445         if instanceof(class, AbstractSection) then
 446                 local obj  = class(self, ...)
 447                 self:append(obj)
 448                 return obj
 449         else
 450                 error("class must be a descendent of AbstractSection")
 451         end
 452 end
 453
 454 -- UCI add
 455 function Map.add(self, sectiontype)
 456         return self.uci:add(self.config, sectiontype)
 457 end
 458
 459 -- UCI set
 460 function Map.set(self, section, option, value)
 461         if type(value) ~= "table" or #value > 0 then
 462                 if option then
 463                         return self.uci:set(self.config, section, option, value)
 464                 else
 465                         return self.uci:set(self.config, section, value)
 466                 end
 467         else
 468                 return Map.del(self, section, option)
 469         end
 470 end
 471
 472 -- UCI del
 473 function Map.del(self, section, option)
 474         if option then
 475                 return self.uci:delete(self.config, section, option)
 476         else
 477                 return self.uci:delete(self.config, section)
 478         end
 479 end
 480
 481 -- UCI get
 482 function Map.get(self, section, option)
 483         if not section then
 484                 return self.uci:get_all(self.config)
 485         elseif option then
 486                 return self.uci:get(self.config, section, option)
 487         else
 488                 return self.uci:get_all(self.config, section)
 489         end
 490 end
 491
 492 --[[
 493 Compound - Container
 494 ]]--
 495 Compound = class(Node)
 496
 497 function Compound.__init__(self, ...)
 498         Node.__init__(self)
 499         self.template = "cbi/compound"
 500         self.children = {...}
 501 end
 502
 503 function Compound.populate_delegator(self, delegator)
 504         for _, v in ipairs(self.children) do
 505                 v.delegator = delegator
 506         end
 507 end
 508
 509 function Compound.parse(self, ...)
 510         local cstate, state = 0
 511
 512         for k, child in ipairs(self.children) do
 513                 cstate = child:parse(...)
 514                 state = (not state or cstate < state) and cstate or state
 515         end
 516
 517         return state
 518 end
 519
 520
 521 --[[
 522 Delegator - Node controller
 523 ]]--
 524 Delegator = class(Node)
 525 function Delegator.__init__(self, ...)
 526         Node.__init__(self, ...)
 527         self.nodes = {}
 528         self.defaultpath = {}
 529         self.pageaction = false
 530         self.readinput = true
 531         self.allow_reset = false
 532         self.allow_cancel = false
 533         self.allow_back = false
 534         self.allow_finish = false
 535         self.template = "cbi/delegator"
 536 end
 537
 538 function Delegator.set(self, name, node)
 539         assert(not self.nodes[name], "Duplicate entry")
 540
 541         self.nodes[name] = node
 542 end
 543
 544 function Delegator.add(self, name, node)
 545         node = self:set(name, node)
 546         self.defaultpath[#self.defaultpath+1] = name
 547 end
 548
 549 function Delegator.insert_after(self, name, after)
 550         local n = #self.chain + 1
 551         for k, v in ipairs(self.chain) do
 552                 if v == after then
 553                         n = k + 1
 554                         break
 555                 end
 556         end
 557         table.insert(self.chain, n, name)
 558 end
 559
 560 function Delegator.set_route(self, ...)
 561         local n, chain, route = 0, self.chain, {...}
 562         for i = 1, #chain do
 563                 if chain[i] == self.current then
 564                         n = i
 565                         break
 566                 end
 567         end
 568         for i = 1, #route do
 569                 n = n + 1
 570                 chain[n] = route[i]
 571         end
 572         for i = n + 1, #chain do
 573                 chain[i] = nil
 574         end
 575 end
 576
 577 function Delegator.get(self, name)
 578         local node = self.nodes[name]
 579
 580         if type(node) == "string" then
 581                 node = load(node, name)
 582         end
 583
 584         if type(node) == "table" and getmetatable(node) == nil then
 585                 node = Compound(unpack(node))
 586         end
 587
 588         return node
 589 end
 590
 591 function Delegator.parse(self, ...)
 592         if self.allow_cancel and Map.formvalue(self, "cbi.cancel") then
 593                 if self:_run_hooks("on_cancel") then
 594                         return FORM_DONE
 595                 end
 596         end
 597
 598         if not Map.formvalue(self, "cbi.delg.current") then
 599                 self:_run_hooks("on_init")
 600         end
 601
 602         local newcurrent
 603         self.chain = self.chain or self:get_chain()
 604         self.current = self.current or self:get_active()
 605         self.active = self.active or self:get(self.current)
 606         assert(self.active, "Invalid state")
 607
 608         local stat = FORM_DONE
 609         if type(self.active) ~= "function" then
 610                 self.active:populate_delegator(self)
 611                 stat = self.active:parse()
 612         else
 613                 self:active()
 614         end
 615
 616         if stat > FORM_PROCEED then
 617                 if Map.formvalue(self, "cbi.delg.back") then
 618                         newcurrent = self:get_prev(self.current)
 619                 else
 620                         newcurrent = self:get_next(self.current)
 621                 end
 622         elseif stat < FORM_PROCEED then
 623                 return stat
 624         end
 625
 626
 627         if not Map.formvalue(self, "cbi.submit") then
 628                 return FORM_NODATA
 629         elseif stat > FORM_PROCEED
 630         and (not newcurrent or not self:get(newcurrent)) then
 631                 return self:_run_hook("on_done") or FORM_DONE
 632         else
 633                 self.current = newcurrent or self.current
 634                 self.active = self:get(self.current)
 635                 if type(self.active) ~= "function" then
 636                         self.active:populate_delegator(self)
 637                         local stat = self.active:parse(false)
 638                         if stat == FORM_SKIP then
 639                                 return self:parse(...)
 640                         else
 641                                 return FORM_PROCEED
 642                         end
 643                 else
 644                         return self:parse(...)
 645                 end
 646         end
 647 end
 648
 649 function Delegator.get_next(self, state)
 650         for k, v in ipairs(self.chain) do
 651                 if v == state then
 652                         return self.chain[k+1]
 653                 end
 654         end
 655 end
 656
 657 function Delegator.get_prev(self, state)
 658         for k, v in ipairs(self.chain) do
 659                 if v == state then
 660                         return self.chain[k-1]
 661                 end
 662         end
 663 end
 664
 665 function Delegator.get_chain(self)
 666         local x = Map.formvalue(self, "cbi.delg.path") or self.defaultpath
 667         return type(x) == "table" and x or {x}
 668 end
 669
 670 function Delegator.get_active(self)
 671         return Map.formvalue(self, "cbi.delg.current") or self.chain[1]
 672 end
 673
 674 --[[
 675 Page - A simple node
 676 ]]--
 677
 678 Page = class(Node)
 679 Page.__init__ = Node.__init__
 680 Page.parse    = function() end
 681
 682
 683 --[[
 684 SimpleForm - A Simple non-UCI form
 685 ]]--
 686 SimpleForm = class(Node)
 687
 688 function SimpleForm.__init__(self, config, title, description, data)
 689         Node.__init__(self, title, description)
 690         self.config = config
 691         self.data = data or {}
 692         self.template = "cbi/simpleform"
 693         self.dorender = true
 694         self.pageaction = false
 695         self.readinput = true
 696 end
 697
 698 SimpleForm.formvalue = Map.formvalue
 699 SimpleForm.formvaluetable = Map.formvaluetable
 700
 701 function SimpleForm.parse(self, readinput, ...)
 702         self.readinput = (readinput ~= false)
 703
 704         if self:formvalue("cbi.skip") then
 705                 return FORM_SKIP
 706         end
 707
 708         if self:formvalue("cbi.cancel") and self:_run_hooks("on_cancel") then
 709                 return FORM_DONE
 710         end
 711
 712         if self:submitstate() then
 713                 Node.parse(self, 1, ...)
 714         end
 715
 716         local valid = true
 717         for k, j in ipairs(self.children) do
 718                 for i, v in ipairs(j.children) do
 719                         valid = valid
 720                          and (not v.tag_missing or not v.tag_missing[1])
 721                          and (not v.tag_invalid or not v.tag_invalid[1])
 722                          and (not v.error)
 723                 end
 724         end
 725
 726         local state =
 727                 not self:submitstate() and FORM_NODATA
 728                 or valid and FORM_VALID
 729                 or FORM_INVALID
 730
 731         self.dorender = not self.handle
 732         if self.handle then
 733                 local nrender, nstate = self:handle(state, self.data)
 734                 self.dorender = self.dorender or (nrender ~= false)
 735                 state = nstate or state
 736         end
 737         return state
 738 end
 739
 740 function SimpleForm.render(self, ...)
 741         if self.dorender then
 742                 Node.render(self, ...)
 743         end
 744 end
 745
 746 function SimpleForm.submitstate(self)
 747         return self:formvalue("cbi.submit")
 748 end
 749
 750 function SimpleForm.section(self, class, ...)
 751         if instanceof(class, AbstractSection) then
 752                 local obj  = class(self, ...)
 753                 self:append(obj)
 754                 return obj
 755         else
 756                 error("class must be a descendent of AbstractSection")
 757         end
 758 end
 759
 760 -- Creates a child field
 761 function SimpleForm.field(self, class, ...)
 762         local section
 763         for k, v in ipairs(self.children) do
 764                 if instanceof(v, SimpleSection) then
 765                         section = v
 766                         break
 767                 end
 768         end
 769         if not section then
 770                 section = self:section(SimpleSection)
 771         end
 772
 773         if instanceof(class, AbstractValue) then
 774                 local obj  = class(self, section, ...)
 775                 obj.track_missing = true
 776                 section:append(obj)
 777                 return obj
 778         else
 779                 error("class must be a descendent of AbstractValue")
 780         end
 781 end
 782
 783 function SimpleForm.set(self, section, option, value)
 784         self.data[option] = value
 785 end
 786
 787
 788 function SimpleForm.del(self, section, option)
 789         self.data[option] = nil
 790 end
 791
 792
 793 function SimpleForm.get(self, section, option)
 794         return self.data[option]
 795 end
 796
 797
 798 function SimpleForm.get_scheme()
 799         return nil
 800 end
 801
 802
 803 Form = class(SimpleForm)
 804
 805 function Form.__init__(self, ...)
 806         SimpleForm.__init__(self, ...)
 807         self.embedded = true
 808 end
 809
 810
 811 --[[
 812 AbstractSection
 813 ]]--
 814 AbstractSection = class(Node)
 815
 816 function AbstractSection.__init__(self, map, sectiontype, ...)
 817         Node.__init__(self, ...)
 818         self.sectiontype = sectiontype
 819         self.map = map
 820         self.config = map.config
 821         self.optionals = {}
 822         self.defaults = {}
 823         self.fields = {}
 824         self.tag_error = {}
 825         self.tag_invalid = {}
 826         self.tag_deperror = {}
 827         self.changed = false
 828
 829         self.optional = true
 830         self.addremove = false
 831         self.dynamic = false
 832 end
 833
 834 -- Define a tab for the section
 835 function AbstractSection.tab(self, tab, title, desc)
 836         self.tabs      = self.tabs      or { }
 837         self.tab_names = self.tab_names or { }
 838
 839         self.tab_names[#self.tab_names+1] = tab
 840         self.tabs[tab] = {
 841                 title       = title,
 842                 description = desc,
 843                 childs      = { }
 844         }
 845 end
 846
 847 -- Check whether the section has tabs
 848 function AbstractSection.has_tabs(self)
 849         return (self.tabs ~= nil) and (next(self.tabs) ~= nil)
 850 end
 851
 852 -- Appends a new option
 853 function AbstractSection.option(self, class, option, ...)
 854         if instanceof(class, AbstractValue) then
 855                 local obj  = class(self.map, self, option, ...)
 856                 self:append(obj)
 857                 self.fields[option] = obj
 858                 return obj
 859         elseif class == true then
 860                 error("No valid class was given and autodetection failed.")
 861         else
 862                 error("class must be a descendant of AbstractValue")
 863         end
 864 end
 865
 866 -- Appends a new tabbed option
 867 function AbstractSection.taboption(self, tab, ...)
 868
 869         assert(tab and self.tabs and self.tabs[tab],
 870                 "Cannot assign option to not existing tab %q" % tostring(tab))
 871
 872         local l = self.tabs[tab].childs
 873         local o = AbstractSection.option(self, ...)
 874
 875         if o then l[#l+1] = o end
 876
 877         return o
 878 end
 879
 880 -- Render a single tab
 881 function AbstractSection.render_tab(self, tab, ...)
 882
 883         assert(tab and self.tabs and self.tabs[tab],
 884                 "Cannot render not existing tab %q" % tostring(tab))
 885
 886         local k, node
 887         for k, node in ipairs(self.tabs[tab].childs) do
 888                 node.last_child = (k == #self.tabs[tab].childs)
 889                 node.index = k
 890                 node:render(...)
 891         end
 892 end
 893
 894 -- Parse optional options
 895 function AbstractSection.parse_optionals(self, section, noparse)
 896         if not self.optional then
 897                 return
 898         end
 899
 900         self.optionals[section] = {}
 901
 902         local field = nil
 903         if not noparse then
 904                 field = self.map:formvalue("cbi.opt."..self.config.."."..section)
 905         end
 906
 907         for k,v in ipairs(self.children) do
 908                 if v.optional and not v:cfgvalue(section) and not self:has_tabs() then
 909                         if field == v.option then
 910                                 field = nil
 911                                 self.map.proceed = true
 912                         else
 913                                 table.insert(self.optionals[section], v)
 914                         end
 915                 end
 916         end
 917
 918         if field and #field > 0 and self.dynamic then
 919                 self:add_dynamic(field)
 920         end
 921 end
 922
 923 -- Add a dynamic option
 924 function AbstractSection.add_dynamic(self, field, optional)
 925         local o = self:option(Value, field, field)
 926         o.optional = optional
 927 end
 928
 929 -- Parse all dynamic options
 930 function AbstractSection.parse_dynamic(self, section)
 931         if not self.dynamic then
 932                 return
 933         end
 934
 935         local arr  = luci.util.clone(self:cfgvalue(section))
 936         local form = self.map:formvaluetable("cbid."..self.config.."."..section)
 937         for k, v in pairs(form) do
 938                 arr[k] = v
 939         end
 940
 941         for key,val in pairs(arr) do
 942                 local create = true
 943
 944                 for i,c in ipairs(self.children) do
 945                         if c.option == key then
 946                                 create = false
 947                         end
 948                 end
 949
 950                 if create and key:sub(1, 1) ~= "." then
 951                         self.map.proceed = true
 952                         self:add_dynamic(key, true)
 953                 end
 954         end
 955 end
 956
 957 -- Returns the section's UCI table
 958 function AbstractSection.cfgvalue(self, section)
 959         return self.map:get(section)
 960 end
 961
 962 -- Push events
 963 function AbstractSection.push_events(self)
 964         --luci.util.append(self.map.events, self.events)
 965         self.map.changed = true
 966 end
 967
 968 -- Removes the section
 969 function AbstractSection.remove(self, section)
 970         self.map.proceed = true
 971         return self.map:del(section)
 972 end
 973
 974 -- Creates the section
 975 function AbstractSection.create(self, section)
 976         local stat
 977
 978         if section then
 979                 stat = section:match("^[%w_]+$") and self.map:set(section, nil, self.sectiontype)
 980         else
 981                 section = self.map:add(self.sectiontype)
 982                 stat = section
 983         end
 984
 985         if stat then
 986                 for k,v in pairs(self.children) do
 987                         if v.default then
 988                                 self.map:set(section, v.option, v.default)
 989                         end
 990                 end
 991
 992                 for k,v in pairs(self.defaults) do
 993                         self.map:set(section, k, v)
 994                 end
 995         end
 996
 997         self.map.proceed = true
 998
 999         return stat
1000 end
1001
1002
1003 SimpleSection = class(AbstractSection)
1004
1005 function SimpleSection.__init__(self, form, ...)
1006         AbstractSection.__init__(self, form, nil, ...)
1007         self.template = "cbi/nullsection"
1008 end
1009
1010
1011 Table = class(AbstractSection)
1012
1013 function Table.__init__(self, form, data, ...)
1014         local datasource = {}
1015         local tself = self
1016         datasource.config = "table"
1017         self.data = data or {}
1018
1019         datasource.formvalue = Map.formvalue
1020         datasource.formvaluetable = Map.formvaluetable
1021         datasource.readinput = true
1022
1023         function datasource.get(self, section, option)
1024                 return tself.data[section] and tself.data[section][option]
1025         end
1026
1027         function datasource.submitstate(self)
1028                 return Map.formvalue(self, "cbi.submit")
1029         end
1030
1031         function datasource.del(...)
1032                 return true
1033         end
1034
1035         function datasource.get_scheme()
1036                 return nil
1037         end
1038
1039         AbstractSection.__init__(self, datasource, "table", ...)
1040         self.template = "cbi/tblsection"
1041         self.rowcolors = true
1042         self.anonymous = true
1043 end
1044
1045 function Table.parse(self, readinput)
1046         self.map.readinput = (readinput ~= false)
1047         for i, k in ipairs(self:cfgsections()) do
1048                 if self.map:submitstate() then
1049                         Node.parse(self, k)
1050                 end
1051         end
1052 end
1053
1054 function Table.cfgsections(self)
1055         local sections = {}
1056
1057         for i, v in luci.util.kspairs(self.data) do
1058                 table.insert(sections, i)
1059         end
1060
1061         return sections
1062 end
1063
1064 function Table.update(self, data)
1065         self.data = data
1066 end
1067
1068
1069
1070 --[[
1071 NamedSection - A fixed configuration section defined by its name
1072 ]]--
1073 NamedSection = class(AbstractSection)
1074
1075 function NamedSection.__init__(self, map, section, stype, ...)
1076         AbstractSection.__init__(self, map, stype, ...)
1077
1078         -- Defaults
1079         self.addremove = false
1080         self.template = "cbi/nsection"
1081         self.section = section
1082 end
1083
1084 function NamedSection.prepare(self)
1085         AbstractSection.prepare(self)
1086         AbstractSection.parse_optionals(self, self.section, true)
1087 end
1088
1089 function NamedSection.parse(self, novld)
1090         local s = self.section
1091         local active = self:cfgvalue(s)
1092
1093         if self.addremove then
1094                 local path = self.config.."."..s
1095                 if active then -- Remove the section
1096                         if self.map:formvalue("cbi.rns."..path) and self:remove(s) then
1097                                 self:push_events()
1098                                 return
1099                         end
1100                 else           -- Create and apply default values
1101                         if self.map:formvalue("cbi.cns."..path) then
1102                                 self:create(s)
1103                                 return
1104                         end
1105                 end
1106         end
1107
1108         if active then
1109                 AbstractSection.parse_dynamic(self, s)
1110                 if self.map:submitstate() then
1111                         Node.parse(self, s)
1112                 end
1113                 AbstractSection.parse_optionals(self, s)
1114
1115                 if self.changed then
1116                         self:push_events()
1117                 end
1118         end
1119 end
1120
1121
1122 --[[
1123 TypedSection - A (set of) configuration section(s) defined by the type
1124         addremove:      Defines whether the user can add/remove sections of this type
1125         anonymous:  Allow creating anonymous sections
1126         validate:       a validation function returning nil if the section is invalid
1127 ]]--
1128 TypedSection = class(AbstractSection)
1129
1130 function TypedSection.__init__(self, map, type, ...)
1131         AbstractSection.__init__(self, map, type, ...)
1132
1133         self.template = "cbi/tsection"
1134         self.deps = {}
1135         self.anonymous = false
1136 end
1137
1138 function TypedSection.prepare(self)
1139         AbstractSection.prepare(self)
1140
1141         local i, s
1142         for i, s in ipairs(self:cfgsections()) do
1143                 AbstractSection.parse_optionals(self, s, true)
1144         end
1145 end
1146
1147 -- Return all matching UCI sections for this TypedSection
1148 function TypedSection.cfgsections(self)
1149         local sections = {}
1150         self.map.uci:foreach(self.map.config, self.sectiontype,
1151                 function (section)
1152                         if self:checkscope(section[".name"]) then
1153                                 table.insert(sections, section[".name"])
1154                         end
1155                 end)
1156
1157         return sections
1158 end
1159
1160 -- Limits scope to sections that have certain option => value pairs
1161 function TypedSection.depends(self, option, value)
1162         table.insert(self.deps, {option=option, value=value})
1163 end
1164
1165 function TypedSection.parse(self, novld)
1166         if self.addremove then
1167                 -- Remove
1168                 local crval = REMOVE_PREFIX .. self.config
1169                 local name = self.map:formvaluetable(crval)
1170                 for k,v in pairs(name) do
1171                         if k:sub(-2) == ".x" then
1172                                 k = k:sub(1, #k - 2)
1173                         end
1174                         if self:cfgvalue(k) and self:checkscope(k) then
1175                                 self:remove(k)
1176                         end
1177                 end
1178         end
1179
1180         local co
1181         for i, k in ipairs(self:cfgsections()) do
1182                 AbstractSection.parse_dynamic(self, k)
1183                 if self.map:submitstate() then
1184                         Node.parse(self, k, novld)
1185                 end
1186                 AbstractSection.parse_optionals(self, k)
1187         end
1188
1189         if self.addremove then
1190                 -- Create
1191                 local created
1192                 local crval = CREATE_PREFIX .. self.config .. "." .. self.sectiontype
1193                 local origin, name = next(self.map:formvaluetable(crval))
1194                 if self.anonymous then
1195                         if name then
1196                                 created = self:create(nil, origin)
1197                         end
1198                 else
1199                         if name then
1200                                 -- Ignore if it already exists
1201                                 if self:cfgvalue(name) then
1202                                         name = nil;
1203                                 end
1204
1205                                 name = self:checkscope(name)
1206
1207                                 if not name then
1208                                         self.err_invalid = true
1209                                 end
1210
1211                                 if name and #name > 0 then
1212                                         created = self:create(name, origin) and name
1213                                         if not created then
1214                                                 self.invalid_cts = true
1215                                         end
1216                                 end
1217                         end
1218                 end
1219
1220                 if created then
1221                         AbstractSection.parse_optionals(self, created)
1222                 end
1223         end
1224
1225         if self.sortable then
1226                 local stval = RESORT_PREFIX .. self.config .. "." .. self.sectiontype
1227                 local order = self.map:formvalue(stval)
1228                 if order and #order > 0 then
1229                         local sid
1230                         local num = 0
1231                         for sid in util.imatch(order) do
1232                                 self.map.uci:reorder(self.config, sid, num)
1233                                 num = num + 1
1234                         end
1235                         self.changed = (num > 0)
1236                 end
1237         end
1238
1239         if created or self.changed then
1240                 self:push_events()
1241         end
1242 end
1243
1244 -- Verifies scope of sections
1245 function TypedSection.checkscope(self, section)
1246         -- Check if we are not excluded
1247         if self.filter and not self:filter(section) then
1248                 return nil
1249         end
1250
1251         -- Check if at least one dependency is met
1252         if #self.deps > 0 and self:cfgvalue(section) then
1253                 local stat = false
1254
1255                 for k, v in ipairs(self.deps) do
1256                         if self:cfgvalue(section)[v.option] == v.value then
1257                                 stat = true
1258                         end
1259                 end
1260
1261                 if not stat then
1262                         return nil
1263                 end
1264         end
1265
1266         return self:validate(section)
1267 end
1268
1269
1270 -- Dummy validate function
1271 function TypedSection.validate(self, section)
1272         return section
1273 end
1274
1275
1276 --[[
1277 AbstractValue - An abstract Value Type
1278         null:           Value can be empty
1279         valid:          A function returning the value if it is valid otherwise nil
1280         depends:        A table of option => value pairs of which one must be true
1281         default:        The default value
1282         size:           The size of the input fields
1283         rmempty:        Unset value if empty
1284         optional:       This value is optional (see AbstractSection.optionals)
1285 ]]--
1286 AbstractValue = class(Node)
1287
1288 function AbstractValue.__init__(self, map, section, option, ...)
1289         Node.__init__(self, ...)
1290         self.section = section
1291         self.option  = option
1292         self.map     = map
1293         self.config  = map.config
1294         self.tag_invalid = {}
1295         self.tag_missing = {}
1296         self.tag_reqerror = {}
1297         self.tag_error = {}
1298         self.deps = {}
1299         --self.cast = "string"
1300
1301         self.track_missing = false
1302         self.rmempty   = true
1303         self.default   = nil
1304         self.size      = nil
1305         self.optional  = false
1306 end
1307
1308 function AbstractValue.prepare(self)
1309         self.cast = self.cast or "string"
1310 end
1311
1312 -- Add a dependencie to another section field
1313 function AbstractValue.depends(self, field, value)
1314         local deps
1315         if type(field) == "string" then
1316                 deps = {}
1317                 deps[field] = value
1318         else
1319                 deps = field
1320         end
1321
1322         table.insert(self.deps, deps)
1323 end
1324
1325 -- Serialize dependencies
1326 function AbstractValue.deplist2json(self, section, deplist)
1327         local deps, i, d = { }
1328
1329         if type(self.deps) == "table" then
1330                 for i, d in ipairs(deplist or self.deps) do
1331                         local a, k, v = { }
1332                         for k, v in pairs(d) do
1333                                 if k:find("!", 1, true) then
1334                                         a[k] = v
1335                                 elseif k:find(".", 1, true) then
1336                                         a['cbid.%s' % k] = v
1337                                 else
1338                                         a['cbid.%s.%s.%s' %{ self.config, section, k }] = v
1339                                 end
1340                         end
1341                         deps[#deps+1] = a
1342                 end
1343         end
1344
1345         return util.serialize_json(deps)
1346 end
1347
1348 -- Generates the unique CBID
1349 function AbstractValue.cbid(self, section)
1350         return "cbid."..self.map.config.."."..section.."."..self.option
1351 end
1352
1353 -- Return whether this object should be created
1354 function AbstractValue.formcreated(self, section)
1355         local key = "cbi.opt."..self.config.."."..section
1356         return (self.map:formvalue(key) == self.option)
1357 end
1358
1359 -- Returns the formvalue for this object
1360 function AbstractValue.formvalue(self, section)
1361         return self.map:formvalue(self:cbid(section))
1362 end
1363
1364 function AbstractValue.additional(self, value)
1365         self.optional = value
1366 end
1367
1368 function AbstractValue.mandatory(self, value)
1369         self.rmempty = not value
1370 end
1371
1372 function AbstractValue.add_error(self, section, type, msg)
1373         self.error = self.error or { }
1374         self.error[section] = msg or type
1375
1376         self.section.error = self.section.error or { }
1377         self.section.error[section] = self.section.error[section] or { }
1378         table.insert(self.section.error[section], msg or type)
1379
1380         if type == "invalid" then
1381                 self.tag_invalid[section] = true
1382         elseif type == "missing" then
1383                 self.tag_missing[section] = true
1384         end
1385
1386         self.tag_error[section] = true
1387         self.map.save = false
1388 end
1389
1390 function AbstractValue.parse(self, section, novld)
1391         local fvalue = self:formvalue(section)
1392         local cvalue = self:cfgvalue(section)
1393
1394         -- If favlue and cvalue are both tables and have the same content
1395         -- make them identical
1396         if type(fvalue) == "table" and type(cvalue) == "table" then
1397                 local equal = #fvalue == #cvalue
1398                 if equal then
1399                         for i=1, #fvalue do
1400                                 if cvalue[i] ~= fvalue[i] then
1401                                         equal = false
1402                                 end
1403                         end
1404                 end
1405                 if equal then
1406                         fvalue = cvalue
1407                 end
1408         end
1409
1410         if fvalue and #fvalue > 0 then -- If we have a form value, write it to UCI
1411                 local val_err
1412                 fvalue, val_err = self:validate(fvalue, section)
1413                 fvalue = self:transform(fvalue)
1414
1415                 if not fvalue and not novld then
1416                         self:add_error(section, "invalid", val_err)
1417                 end
1418
1419                 if fvalue and (self.forcewrite or not (fvalue == cvalue)) then
1420                         if self:write(section, fvalue) then
1421                                 -- Push events
1422                                 self.section.changed = true
1423                                 --luci.util.append(self.map.events, self.events)
1424                         end
1425                 end
1426         else                                                    -- Unset the UCI or error
1427                 if self.rmempty or self.optional then
1428                         if self:remove(section) then
1429                                 -- Push events
1430                                 self.section.changed = true
1431                                 --luci.util.append(self.map.events, self.events)
1432                         end
1433                 elseif cvalue ~= fvalue and not novld then
1434                         -- trigger validator with nil value to get custom user error msg.
1435                         local _, val_err = self:validate(nil, section)
1436                         self:add_error(section, "missing", val_err)
1437                 end
1438         end
1439 end
1440
1441 -- Render if this value exists or if it is mandatory
1442 function AbstractValue.render(self, s, scope)
1443         if not self.optional or self.section:has_tabs() or self:cfgvalue(s) or self:formcreated(s) then
1444                 scope = scope or {}
1445                 scope.section = s
1446                 scope.cbid    = self:cbid(s)
1447                 Node.render(self, scope)
1448         end
1449 end
1450
1451 -- Return the UCI value of this object
1452 function AbstractValue.cfgvalue(self, section)
1453         local value
1454         if self.tag_error[section] then
1455                 value = self:formvalue(section)
1456         else
1457                 value = self.map:get(section, self.option)
1458         end
1459
1460         if not value then
1461                 return nil
1462         elseif not self.cast or self.cast == type(value) then
1463                 return value
1464         elseif self.cast == "string" then
1465                 if type(value) == "table" then
1466                         return value[1]
1467                 end
1468         elseif self.cast == "table" then
1469                 return { value }
1470         end
1471 end
1472
1473 -- Validate the form value
1474 function AbstractValue.validate(self, value)
1475         if self.datatype and value then
1476                 if type(value) == "table" then
1477                         local v
1478                         for _, v in ipairs(value) do
1479                                 if v and #v > 0 and not verify_datatype(self.datatype, v) then
1480                                         return nil
1481                                 end
1482                         end
1483                 else
1484                         if not verify_datatype(self.datatype, value) then
1485                                 return nil
1486                         end
1487                 end
1488         end
1489
1490         return value
1491 end
1492
1493 AbstractValue.transform = AbstractValue.validate
1494
1495
1496 -- Write to UCI
1497 function AbstractValue.write(self, section, value)
1498         return self.map:set(section, self.option, value)
1499 end
1500
1501 -- Remove from UCI
1502 function AbstractValue.remove(self, section)
1503         return self.map:del(section, self.option)
1504 end
1505
1506
1507
1508
1509 --[[
1510 Value - A one-line value
1511         maxlength:      The maximum length
1512 ]]--
1513 Value = class(AbstractValue)
1514
1515 function Value.__init__(self, ...)
1516         AbstractValue.__init__(self, ...)
1517         self.template  = "cbi/value"
1518         self.keylist = {}
1519         self.vallist = {}
1520         self.readonly = nil
1521 end
1522
1523 function Value.reset_values(self)
1524         self.keylist = {}
1525         self.vallist = {}
1526 end
1527
1528 function Value.value(self, key, val)
1529         val = val or key
1530         table.insert(self.keylist, tostring(key))
1531         table.insert(self.vallist, tostring(val))
1532 end
1533
1534 function Value.parse(self, section, novld)
1535         if self.readonly then return end
1536         AbstractValue.parse(self, section, novld)
1537 end
1538
1539 -- DummyValue - This does nothing except being there
1540 DummyValue = class(AbstractValue)
1541
1542 function DummyValue.__init__(self, ...)
1543         AbstractValue.__init__(self, ...)
1544         self.template = "cbi/dvalue"
1545         self.value = nil
1546 end
1547
1548 function DummyValue.cfgvalue(self, section)
1549         local value
1550         if self.value then
1551                 if type(self.value) == "function" then
1552                         value = self:value(section)
1553                 else
1554                         value = self.value
1555                 end
1556         else
1557                 value = AbstractValue.cfgvalue(self, section)
1558         end
1559         return value
1560 end
1561
1562 function DummyValue.parse(self)
1563
1564 end
1565
1566
1567 --[[
1568 Flag - A flag being enabled or disabled
1569 ]]--
1570 Flag = class(AbstractValue)
1571
1572 function Flag.__init__(self, ...)
1573         AbstractValue.__init__(self, ...)
1574         self.template  = "cbi/fvalue"
1575
1576         self.enabled  = "1"
1577         self.disabled = "0"
1578         self.default  = self.disabled
1579 end
1580
1581 -- A flag can only have two states: set or unset
1582 function Flag.parse(self, section, novld)
1583         local fexists = self.map:formvalue(
1584                 FEXIST_PREFIX .. self.config .. "." .. section .. "." .. self.option)
1585
1586         if fexists then
1587                 local fvalue = self:formvalue(section) and self.enabled or self.disabled
1588                 local cvalue = self:cfgvalue(section)
1589                 local val_err
1590                 fvalue, val_err = self:validate(fvalue, section)
1591                 if not fvalue then
1592                         if not novld then
1593                                 self:add_error(section, "invalid", val_err)
1594                         end
1595                         return
1596                 end
1597                 if fvalue == self.default and (self.optional or self.rmempty) then
1598                         self:remove(section)
1599                 else
1600                         self:write(section, fvalue)
1601                 end
1602                 if (fvalue ~= cvalue) then self.section.changed = true end
1603         else
1604                 self:remove(section)
1605                 self.section.changed = true
1606         end
1607 end
1608
1609 function Flag.cfgvalue(self, section)
1610         return AbstractValue.cfgvalue(self, section) or self.default
1611 end
1612 function Flag.validate(self, value)
1613         return value
1614 end
1615
1616 --[[
1617 ListValue - A one-line value predefined in a list
1618         widget: The widget that will be used (select, radio)
1619 ]]--
1620 ListValue = class(AbstractValue)
1621
1622 function ListValue.__init__(self, ...)
1623         AbstractValue.__init__(self, ...)
1624         self.template  = "cbi/lvalue"
1625
1626         self.keylist = {}
1627         self.vallist = {}
1628         self.deplist = {}
1629         self.size   = 1
1630         self.widget = "select"
1631 end
1632
1633 function ListValue.reset_values(self)
1634         self.keylist = {}
1635         self.vallist = {}
1636 end
1637
1638 function ListValue.value(self, key, val, ...)
1639         if luci.util.contains(self.keylist, key) then
1640                 return
1641         end
1642
1643         val = val or key
1644         table.insert(self.keylist, tostring(key))
1645         table.insert(self.vallist, tostring(val))
1646         table.insert(self.deplist, {...})
1647 end
1648
1649 function ListValue.validate(self, val)
1650         if luci.util.contains(self.keylist, val) then
1651                 return val
1652         else
1653                 return nil
1654         end
1655 end
1656
1657
1658
1659 --[[
1660 MultiValue - Multiple delimited values
1661         widget: The widget that will be used (select, checkbox)
1662         delimiter: The delimiter that will separate the values (default: " ")
1663 ]]--
1664 MultiValue = class(AbstractValue)
1665
1666 function MultiValue.__init__(self, ...)
1667         AbstractValue.__init__(self, ...)
1668         self.template = "cbi/mvalue"
1669
1670         self.keylist = {}
1671         self.vallist = {}
1672
1673         self.widget = "checkbox"
1674         self.delimiter = " "
1675 end
1676
1677 function MultiValue.render(self, ...)
1678         if self.widget == "select" and not self.size then
1679                 self.size = #self.vallist
1680         end
1681
1682         AbstractValue.render(self, ...)
1683 end
1684
1685 function MultiValue.reset_values(self)
1686         self.keylist = {}
1687         self.vallist = {}
1688 end
1689
1690 function MultiValue.value(self, key, val)
1691         if luci.util.contains(self.keylist, key) then
1692                 return
1693         end
1694
1695         val = val or key
1696         table.insert(self.keylist, tostring(key))
1697         table.insert(self.vallist, tostring(val))
1698 end
1699
1700 function MultiValue.valuelist(self, section)
1701         local val = self:cfgvalue(section)
1702
1703         if not(type(val) == "string") then
1704                 return {}
1705         end
1706
1707         return luci.util.split(val, self.delimiter)
1708 end
1709
1710 function MultiValue.validate(self, val)
1711         val = (type(val) == "table") and val or {val}
1712
1713         local result
1714
1715         for i, value in ipairs(val) do
1716                 if luci.util.contains(self.keylist, value) then
1717                         result = result and (result .. self.delimiter .. value) or value
1718                 end
1719         end
1720
1721         return result
1722 end
1723
1724
1725 StaticList = class(MultiValue)
1726
1727 function StaticList.__init__(self, ...)
1728         MultiValue.__init__(self, ...)
1729         self.cast = "table"
1730         self.valuelist = self.cfgvalue
1731
1732         if not self.override_scheme
1733          and self.map:get_scheme(self.section.sectiontype, self.option) then
1734                 local vs = self.map:get_scheme(self.section.sectiontype, self.option)
1735                 if self.value and vs.values and not self.override_values then
1736                         for k, v in pairs(vs.values) do
1737                                 self:value(k, v)
1738                         end
1739                 end
1740         end
1741 end
1742
1743 function StaticList.validate(self, value)
1744         value = (type(value) == "table") and value or {value}
1745
1746         local valid = {}
1747         for i, v in ipairs(value) do
1748                 if luci.util.contains(self.keylist, v) then
1749                         table.insert(valid, v)
1750                 end
1751         end
1752         return valid
1753 end
1754
1755
1756 DynamicList = class(AbstractValue)
1757
1758 function DynamicList.__init__(self, ...)
1759         AbstractValue.__init__(self, ...)
1760         self.template  = "cbi/dynlist"
1761         self.cast = "table"
1762         self.keylist = {}
1763         self.vallist = {}
1764 end
1765
1766 function DynamicList.reset_values(self)
1767         self.keylist = {}
1768         self.vallist = {}
1769 end
1770
1771 function DynamicList.value(self, key, val)
1772         val = val or key
1773         table.insert(self.keylist, tostring(key))
1774         table.insert(self.vallist, tostring(val))
1775 end
1776
1777 function DynamicList.write(self, section, value)
1778         local t = { }
1779
1780         if type(value) == "table" then
1781                 local x
1782                 for _, x in ipairs(value) do
1783                         if x and #x > 0 then
1784                                 t[#t+1] = x
1785                         end
1786                 end
1787         else
1788                 t = { value }
1789         end
1790
1791         if self.cast == "string" then
1792                 value = table.concat(t, " ")
1793         else
1794                 value = t
1795         end
1796
1797         return AbstractValue.write(self, section, value)
1798 end
1799
1800 function DynamicList.cfgvalue(self, section)
1801         local value = AbstractValue.cfgvalue(self, section)
1802
1803         if type(value) == "string" then
1804                 local x
1805                 local t = { }
1806                 for x in value:gmatch("%S+") do
1807                         if #x > 0 then
1808                                 t[#t+1] = x
1809                         end
1810                 end
1811                 value = t
1812         end
1813
1814         return value
1815 end
1816
1817 function DynamicList.formvalue(self, section)
1818         local value = AbstractValue.formvalue(self, section)
1819
1820         if type(value) == "string" then
1821                 if self.cast == "string" then
1822                         local x
1823                         local t = { }
1824                         for x in value:gmatch("%S+") do
1825                                 t[#t+1] = x
1826                         end
1827                         value = t
1828                 else
1829                         value = { value }
1830                 end
1831         end
1832
1833         return value
1834 end
1835
1836
1837 --[[
1838 TextValue - A multi-line value
1839         rows:   Rows
1840 ]]--
1841 TextValue = class(AbstractValue)
1842
1843 function TextValue.__init__(self, ...)
1844         AbstractValue.__init__(self, ...)
1845         self.template  = "cbi/tvalue"
1846 end
1847
1848 --[[
1849 Button
1850 ]]--
1851 Button = class(AbstractValue)
1852
1853 function Button.__init__(self, ...)
1854         AbstractValue.__init__(self, ...)
1855         self.template  = "cbi/button"
1856         self.inputstyle = nil
1857         self.rmempty = true
1858         self.unsafeupload = false
1859 end
1860
1861
1862 FileUpload = class(AbstractValue)
1863
1864 function FileUpload.__init__(self, ...)
1865         AbstractValue.__init__(self, ...)
1866         self.template = "cbi/upload"
1867         if not self.map.upload_fields then
1868                 self.map.upload_fields = { self }
1869         else
1870                 self.map.upload_fields[#self.map.upload_fields+1] = self
1871         end
1872 end
1873
1874 function FileUpload.formcreated(self, section)
1875         if self.unsafeupload then
1876                 return AbstractValue.formcreated(self, section) or
1877                         self.map:formvalue("cbi.rlf."..section.."."..self.option) or
1878                         self.map:formvalue("cbi.rlf."..section.."."..self.option..".x") or
1879                         self.map:formvalue("cbid."..self.map.config.."."..section.."."..self.option..".textbox")
1880         else
1881                 return AbstractValue.formcreated(self, section) or
1882                         self.map:formvalue("cbid."..self.map.config.."."..section.."."..self.option..".textbox")
1883         end
1884 end
1885
1886 function FileUpload.cfgvalue(self, section)
1887         local val = AbstractValue.cfgvalue(self, section)
1888         if val and fs.access(val) then
1889                 return val
1890         end
1891         return nil
1892 end
1893
1894 -- If we have a new value, use it
1895 -- otherwise use old value
1896 -- deletion should be managed by a separate button object
1897 -- unless self.unsafeupload is set in which case if the user
1898 -- choose to remove the old file we do so.
1899 -- Also, allow to specify (via textbox) a file already on router
1900 function FileUpload.formvalue(self, section)
1901         local val = AbstractValue.formvalue(self, section)
1902         if val then
1903                 if self.unsafeupload then
1904                         if not self.map:formvalue("cbi.rlf."..section.."."..self.option) and
1905                             not self.map:formvalue("cbi.rlf."..section.."."..self.option..".x")
1906                         then
1907                                 return val
1908                         end
1909                         fs.unlink(val)
1910                         self.value = nil
1911                         return nil
1912                 elseif val ~= "" then
1913                         return val
1914                 end
1915         end
1916         val = luci.http.formvalue("cbid."..self.map.config.."."..section.."."..self.option..".textbox")
1917         if val == "" then
1918                 val = nil
1919         end
1920         if not self.unsafeupload then
1921                 if not val then
1922                         val = self.map:formvalue("cbi.rlf."..section.."."..self.option)
1923                 end
1924         end
1925         return val
1926 end
1927
1928 function FileUpload.remove(self, section)
1929         if self.unsafeupload then
1930                 local val = AbstractValue.formvalue(self, section)
1931                 if val and fs.access(val) then fs.unlink(val) end
1932                 return AbstractValue.remove(self, section)
1933         else
1934                 return nil
1935         end
1936 end
1937
1938 FileBrowser = class(AbstractValue)
1939
1940 function FileBrowser.__init__(self, ...)
1941         AbstractValue.__init__(self, ...)
1942         self.template = "cbi/browser"
1943 end