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Diffstat (limited to 'libs/cbi/luasrc/cbi.lua')
| -rw-r--r-- | libs/cbi/luasrc/cbi.lua | 747 |
1 files changed, 747 insertions, 0 deletions
diff --git a/libs/cbi/luasrc/cbi.lua b/libs/cbi/luasrc/cbi.lua new file mode 100644 index 000000000..b7097b5d9 --- /dev/null +++ b/libs/cbi/luasrc/cbi.lua @@ -0,0 +1,747 @@ +--[[ +LuCI - Configuration Bind Interface + +Description: +Offers an interface for binding confiugration values to certain +data types. Supports value and range validation and basic dependencies. + +FileId: +$Id$ + +License: +Copyright 2008 Steven Barth <steven@midlink.org> + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. + +]]-- +module("luci.cbi", package.seeall) + +require("luci.template") +require("luci.util") +require("luci.http") +require("luci.model.uci") + +local class = luci.util.class +local instanceof = luci.util.instanceof + +-- Loads a CBI map from given file, creating an environment and returns it +function load(cbimap) + require("luci.fs") + require("luci.i18n") + require("luci.config") + require("luci.sys") + + local cbidir = luci.sys.libpath() .. "/model/cbi/" + local func, err = loadfile(cbidir..cbimap..".lua") + + if not func then + return nil + end + + luci.i18n.loadc("cbi") + + luci.util.resfenv(func) + luci.util.updfenv(func, luci.cbi) + luci.util.extfenv(func, "translate", luci.i18n.translate) + + local map = func() + + if not instanceof(map, Map) then + error("CBI map returns no valid map object!") + return nil + end + + return map +end + +-- Node pseudo abstract class +Node = class() + +function Node.__init__(self, title, description) + self.children = {} + self.title = title or "" + self.description = description or "" + self.template = "cbi/node" +end + +-- Append child nodes +function Node.append(self, obj) + table.insert(self.children, obj) +end + +-- Parse this node and its children +function Node.parse(self, ...) + for k, child in ipairs(self.children) do + child:parse(...) + end +end + +-- Render this node +function Node.render(self, scope) + scope = scope or {} + scope.self = self + + luci.template.render(self.template, scope) +end + +-- Render the children +function Node.render_children(self, ...) + for k, node in ipairs(self.children) do + node:render(...) + end +end + + +--[[ +A simple template element +]]-- +Template = class(Node) + +function Template.__init__(self, template) + Node.__init__(self) + self.template = template +end + + +--[[ +Map - A map describing a configuration file +]]-- +Map = class(Node) + +function Map.__init__(self, config, ...) + Node.__init__(self, ...) + self.config = config + self.template = "cbi/map" + self.uci = luci.model.uci.Session() + self.ucidata, self.uciorder = self.uci:sections(self.config) + if not self.ucidata or not self.uciorder then + error("Unable to read UCI data: " .. self.config) + end +end + +-- Use optimized UCI writing +function Map.parse(self, ...) + self.uci:t_load(self.config) + Node.parse(self, ...) + self.uci:t_save(self.config) +end + +-- Creates a child section +function Map.section(self, class, ...) + if instanceof(class, AbstractSection) then + local obj = class(self, ...) + self:append(obj) + return obj + else + error("class must be a descendent of AbstractSection") + end +end + +-- UCI add +function Map.add(self, sectiontype) + local name = self.uci:t_add(self.config, sectiontype) + if name then + self.ucidata[name] = {} + self.ucidata[name][".type"] = sectiontype + table.insert(self.uciorder, name) + end + return name +end + +-- UCI set +function Map.set(self, section, option, value) + local stat = self.uci:t_set(self.config, section, option, value) + if stat then + local val = self.uci:t_get(self.config, section, option) + if option then + self.ucidata[section][option] = val + else + if not self.ucidata[section] then + self.ucidata[section] = {} + end + self.ucidata[section][".type"] = val + table.insert(self.uciorder, section) + end + end + return stat +end + +-- UCI del +function Map.del(self, section, option) + local stat = self.uci:t_del(self.config, section, option) + if stat then + if option then + self.ucidata[section][option] = nil + else + self.ucidata[section] = nil + for i, k in ipairs(self.uciorder) do + if section == k then + table.remove(self.uciorder, i) + end + end + end + end + return stat +end + +-- UCI get (cached) +function Map.get(self, section, option) + if not section then + return self.ucidata, self.uciorder + elseif option and self.ucidata[section] then + return self.ucidata[section][option] + else + return self.ucidata[section] + end +end + + +--[[ +AbstractSection +]]-- +AbstractSection = class(Node) + +function AbstractSection.__init__(self, map, sectiontype, ...) + Node.__init__(self, ...) + self.sectiontype = sectiontype + self.map = map + self.config = map.config + self.optionals = {} + + self.optional = true + self.addremove = false + self.dynamic = false +end + +-- Appends a new option +function AbstractSection.option(self, class, ...) + if instanceof(class, AbstractValue) then + local obj = class(self.map, ...) + self:append(obj) + return obj + else + error("class must be a descendent of AbstractValue") + end +end + +-- Parse optional options +function AbstractSection.parse_optionals(self, section) + if not self.optional then + return + end + + self.optionals[section] = {} + + local field = luci.http.formvalue("cbi.opt."..self.config.."."..section) + for k,v in ipairs(self.children) do + if v.optional and not v:cfgvalue(section) then + if field == v.option then + field = nil + else + table.insert(self.optionals[section], v) + end + end + end + + if field and #field > 0 and self.dynamic then + self:add_dynamic(field) + end +end + +-- Add a dynamic option +function AbstractSection.add_dynamic(self, field, optional) + local o = self:option(Value, field, field) + o.optional = optional +end + +-- Parse all dynamic options +function AbstractSection.parse_dynamic(self, section) + if not self.dynamic then + return + end + + local arr = luci.util.clone(self:cfgvalue(section)) + local form = luci.http.formvaluetable("cbid."..self.config.."."..section) + for k, v in pairs(form) do + arr[k] = v + end + + for key,val in pairs(arr) do + local create = true + + for i,c in ipairs(self.children) do + if c.option == key then + create = false + end + end + + if create and key:sub(1, 1) ~= "." then + self:add_dynamic(key, true) + end + end +end + +-- Returns the section's UCI table +function AbstractSection.cfgvalue(self, section) + return self.map:get(section) +end + +-- Removes the section +function AbstractSection.remove(self, section) + return self.map:del(section) +end + +-- Creates the section +function AbstractSection.create(self, section) + return self.map:set(section, nil, self.sectiontype) +end + + + +--[[ +NamedSection - A fixed configuration section defined by its name +]]-- +NamedSection = class(AbstractSection) + +function NamedSection.__init__(self, map, section, ...) + AbstractSection.__init__(self, map, ...) + self.template = "cbi/nsection" + + self.section = section + self.addremove = false +end + +function NamedSection.parse(self) + local s = self.section + local active = self:cfgvalue(s) + + + if self.addremove then + local path = self.config.."."..s + if active then -- Remove the section + if luci.http.formvalue("cbi.rns."..path) and self:remove(s) then + return + end + else -- Create and apply default values + if luci.http.formvalue("cbi.cns."..path) and self:create(s) then + for k,v in pairs(self.children) do + v:write(s, v.default) + end + end + end + end + + if active then + AbstractSection.parse_dynamic(self, s) + if luci.http.formvalue("cbi.submit") then + Node.parse(self, s) + end + AbstractSection.parse_optionals(self, s) + end +end + + +--[[ +TypedSection - A (set of) configuration section(s) defined by the type + addremove: Defines whether the user can add/remove sections of this type + anonymous: Allow creating anonymous sections + validate: a validation function returning nil if the section is invalid +]]-- +TypedSection = class(AbstractSection) + +function TypedSection.__init__(self, ...) + AbstractSection.__init__(self, ...) + self.template = "cbi/tsection" + self.deps = {} + self.excludes = {} + + self.anonymous = false +end + +-- Return all matching UCI sections for this TypedSection +function TypedSection.cfgsections(self) + local sections = {} + local map, order = self.map:get() + + for i, k in ipairs(order) do + if map[k][".type"] == self.sectiontype then + if self:checkscope(k) then + table.insert(sections, k) + end + end + end + + return sections +end + +-- Creates a new section of this type with the given name (or anonymous) +function TypedSection.create(self, name) + if name then + self.map:set(name, nil, self.sectiontype) + else + name = self.map:add(self.sectiontype) + end + + for k,v in pairs(self.children) do + if v.default then + self.map:set(name, v.option, v.default) + end + end +end + +-- Limits scope to sections that have certain option => value pairs +function TypedSection.depends(self, option, value) + table.insert(self.deps, {option=option, value=value}) +end + +-- Excludes several sections by name +function TypedSection.exclude(self, field) + self.excludes[field] = true +end + +function TypedSection.parse(self) + if self.addremove then + -- Create + local crval = "cbi.cts." .. self.config .. "." .. self.sectiontype + local name = luci.http.formvalue(crval) + if self.anonymous then + if name then + self:create() + end + else + if name then + -- Ignore if it already exists + if self:cfgvalue(name) then + name = nil; + end + + name = self:checkscope(name) + + if not name then + self.err_invalid = true + end + + if name and name:len() > 0 then + self:create(name) + end + end + end + + -- Remove + crval = "cbi.rts." .. self.config + name = luci.http.formvaluetable(crval) + for k,v in pairs(name) do + if self:cfgvalue(k) and self:checkscope(k) then + self:remove(k) + end + end + end + + for i, k in ipairs(self:cfgsections()) do + AbstractSection.parse_dynamic(self, k) + if luci.http.formvalue("cbi.submit") then + Node.parse(self, k) + end + AbstractSection.parse_optionals(self, k) + end +end + +-- Verifies scope of sections +function TypedSection.checkscope(self, section) + -- Check if we are not excluded + if self.excludes[section] then + return nil + end + + -- Check if at least one dependency is met + if #self.deps > 0 and self:cfgvalue(section) then + local stat = false + + for k, v in ipairs(self.deps) do + if self:cfgvalue(section)[v.option] == v.value then + stat = true + end + end + + if not stat then + return nil + end + end + + return self:validate(section) +end + + +-- Dummy validate function +function TypedSection.validate(self, section) + return section +end + + +--[[ +AbstractValue - An abstract Value Type + null: Value can be empty + valid: A function returning the value if it is valid otherwise nil + depends: A table of option => value pairs of which one must be true + default: The default value + size: The size of the input fields + rmempty: Unset value if empty + optional: This value is optional (see AbstractSection.optionals) +]]-- +AbstractValue = class(Node) + +function AbstractValue.__init__(self, map, option, ...) + Node.__init__(self, ...) + self.option = option + self.map = map + self.config = map.config + self.tag_invalid = {} + self.deps = {} + + self.rmempty = false + self.default = nil + self.size = nil + self.optional = false +end + +-- Add a dependencie to another section field +function AbstractValue.depends(self, field, value) + table.insert(self.deps, {field=field, value=value}) +end + +-- Return whether this object should be created +function AbstractValue.formcreated(self, section) + local key = "cbi.opt."..self.config.."."..section + return (luci.http.formvalue(key) == self.option) +end + +-- Returns the formvalue for this object +function AbstractValue.formvalue(self, section) + local key = "cbid."..self.map.config.."."..section.."."..self.option + return luci.http.formvalue(key) +end + +function AbstractValue.parse(self, section) + local fvalue = self:formvalue(section) + + if fvalue and fvalue ~= "" then -- If we have a form value, write it to UCI + fvalue = self:validate(fvalue) + if not fvalue then + self.tag_invalid[section] = true + end + if fvalue and not (fvalue == self:cfgvalue(section)) then + self:write(section, fvalue) + end + else -- Unset the UCI or error + if self.rmempty or self.optional then + self:remove(section) + end + end +end + +-- Render if this value exists or if it is mandatory +function AbstractValue.render(self, s, scope) + if not self.optional or self:cfgvalue(s) or self:formcreated(s) then + scope = scope or {} + scope.section = s + Node.render(self, scope) + end +end + +-- Return the UCI value of this object +function AbstractValue.cfgvalue(self, section) + return self.map:get(section, self.option) +end + +-- Validate the form value +function AbstractValue.validate(self, value) + return value +end + +-- Write to UCI +function AbstractValue.write(self, section, value) + return self.map:set(section, self.option, value) +end + +-- Remove from UCI +function AbstractValue.remove(self, section) + return self.map:del(section, self.option) +end + + + + +--[[ +Value - A one-line value + maxlength: The maximum length + isnumber: The value must be a valid (floating point) number + isinteger: The value must be a valid integer + ispositive: The value must be positive (and a number) +]]-- +Value = class(AbstractValue) + +function Value.__init__(self, ...) + AbstractValue.__init__(self, ...) + self.template = "cbi/value" + + self.maxlength = nil + self.isnumber = false + self.isinteger = false +end + +-- This validation is a bit more complex +function Value.validate(self, val) + if self.maxlength and tostring(val):len() > self.maxlength then + val = nil + end + + return luci.util.validate(val, self.isnumber, self.isinteger) +end + + +-- DummyValue - This does nothing except being there +DummyValue = class(AbstractValue) + +function DummyValue.__init__(self, map, ...) + AbstractValue.__init__(self, map, ...) + self.template = "cbi/dvalue" + self.value = nil +end + +function DummyValue.parse(self) + +end + +function DummyValue.render(self, s) + luci.template.render(self.template, {self=self, section=s}) +end + + +--[[ +Flag - A flag being enabled or disabled +]]-- +Flag = class(AbstractValue) + +function Flag.__init__(self, ...) + AbstractValue.__init__(self, ...) + self.template = "cbi/fvalue" + + self.enabled = "1" + self.disabled = "0" +end + +-- A flag can only have two states: set or unset +function Flag.parse(self, section) + local fvalue = self:formvalue(section) + + if fvalue then + fvalue = self.enabled + else + fvalue = self.disabled + end + + if fvalue == self.enabled or (not self.optional and not self.rmempty) then + if not(fvalue == self:cfgvalue(section)) then + self:write(section, fvalue) + end + else + self:remove(section) + end +end + + + +--[[ +ListValue - A one-line value predefined in a list + widget: The widget that will be used (select, radio) +]]-- +ListValue = class(AbstractValue) + +function ListValue.__init__(self, ...) + AbstractValue.__init__(self, ...) + self.template = "cbi/lvalue" + self.keylist = {} + self.vallist = {} + + self.size = 1 + self.widget = "select" +end + +function ListValue.value(self, key, val) + val = val or key + table.insert(self.keylist, tostring(key)) + table.insert(self.vallist, tostring(val)) +end + +function ListValue.validate(self, val) + if luci.util.contains(self.keylist, val) then + return val + else + return nil + end +end + + + +--[[ +MultiValue - Multiple delimited values + widget: The widget that will be used (select, checkbox) + delimiter: The delimiter that will separate the values (default: " ") +]]-- +MultiValue = class(AbstractValue) + +function MultiValue.__init__(self, ...) + AbstractValue.__init__(self, ...) + self.template = "cbi/mvalue" + self.keylist = {} + self.vallist = {} + + self.widget = "checkbox" + self.delimiter = " " +end + +function MultiValue.value(self, key, val) + val = val or key + table.insert(self.keylist, tostring(key)) + table.insert(self.vallist, tostring(val)) +end + +function MultiValue.valuelist(self, section) + local val = self:cfgvalue(section) + + if not(type(val) == "string") then + return {} + end + + return luci.util.split(val, self.delimiter) +end + +function MultiValue.validate(self, val) + if not(type(val) == "string") then + return nil + end + + local result = "" + + for value in val:gmatch("[^\n]+") do + if luci.util.contains(self.keylist, value) then + result = result .. self.delimiter .. value + end + end + + if result:len() > 0 then + return result:sub(self.delimiter:len() + 1) + else + return nil + end +end
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