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--[[
Copyright (c) 2012-2013 Kaarle Ritvanen
See LICENSE file for license details
--]]
module(..., package.seeall)
local fld = require('acf.model.field')
local Field = fld.Field
local model = require('acf.model.model')
new = model.new
local to_field = model.to_field
node = require('acf.model.node')
local object = require('acf.object')
local class = object.class
local super = object.super
local pth = require('acf.path')
local map = require('acf.util').map
require 'stringy'
-- TODO object-specific actions
-- TODO access control
local Primitive = class(Field)
function Primitive:validate(txn, path, value)
local t = self.dtype
if type(value) ~= t then error('Not a '..t..': '..tostring(value)) end
end
String = class(Primitive)
function String:init(params)
super(self, String):init(params)
self.dtype = 'string'
end
function String:validate(txn, path, value)
super(self, String):validate(txn, path, value)
if self['max-length'] and string.len(value) > self['max-length'] then
error('Maximum length exceeded: '..value)
end
end
function String:meta(txn, path, addr)
local res = super(self, String):meta(txn, path, addr)
res['max-length'] = self['max-length']
return res
end
Number = class(Primitive)
function Number:init(params)
super(self, Number):init(params)
self.dtype = 'number'
end
function Number:_validate(txn, path, value)
return super(self, Number):_validate(
txn,
path,
value and tonumber(value) or value
)
end
Integer = class(Number)
function Integer:validate(txn, path, value)
super(self, Integer):validate(txn, path, value)
if math.floor(value) ~= value then error('Not an integer: '..value) end
end
Boolean = class(Primitive)
function Boolean:init(params)
super(self, Boolean):init(params)
self.dtype = 'boolean'
self.widget = self.dtype
end
Range = class(String)
function Range:init(params)
super(self, Range):init(params)
if not self.type then self.type = Integer end
end
function Range:validate(txn, path, value)
local comps = stringy.split(value, '-')
if #comps > 2 then error('Invalid range') end
for _, v in ipairs(comps) do
to_field(self.type):_validate(txn, path, v)
end
end
Reference = class(Field)
function Reference:init(params)
super(self, Reference):init(params)
self.dtype = 'reference'
if not self.scope then self.scope = '/' end
end
function Reference:abs_scope(path)
return pth.to_absolute(self.scope, pth.parent(path))
end
function Reference:meta(txn, path, addr)
local res = super(self, Reference):meta(txn, path, addr)
res.scope = self:abs_scope(path)
local base = txn:search(res.scope)
local objs = base and txn:get(getmetatable(base).addr) or {}
res.choice = map(function(p) return pth.join(res.scope, p) end, objs)
res['ui-choice'] = objs
return res
end
function Reference:follow(txn, path, value)
return txn:search(pth.join(self:abs_scope(path), value))
end
function Reference:load(txn, path, addr)
local ref = super(self, Reference):load(txn, path, addr)
return ref and self:follow(txn, path, ref) or nil
end
function Reference:_validate(txn, path, value)
super(self, Reference):_validate(txn, path, value)
if value == nil then return end
if object.isinstance(value, node.TreeNode) then
value = getmetatable(value).path
end
if value and pth.is_absolute(value) then
local scope = self:abs_scope(path)
local prefix = scope..'/'
if not stringy.startswith(value, prefix) then
error('Reference out of scope ('..scope..')')
end
value = string.sub(value, string.len(prefix) + 1, -1)
end
-- assume one-level ref for now
assert(not string.find(value, '/'))
if not self:follow(txn, path, value) then
error('Does not exist: '..value)
end
-- TODO check instance type
return value
end
Model = fld.Model
Collection = class(fld.TreeNode)
function Collection:init(params, ctype)
super(self, Collection):init(params)
assert(self.type)
self.ctype = ctype or node.Collection
self.dtype = 'collection'
self.widget = self.dtype
end
function Collection:load(txn, path, addr)
-- automatically create missing collection (TODO: make this configurable?)
return self.ctype(txn, path, addr, to_field(self.type), self.required)
end
PrimitiveList = class(Collection)
function PrimitiveList:init(params)
super(self, PrimitiveList):init(params, node.PrimitiveList)
end
-- experimental
Mixed = class(Collection)
function Mixed:init()
super(self, Mixed):init({type=Mixed}, node.Mixed)
end
function Mixed:load(txn, path, addr)
local value = Primitive.load(self, txn, path, addr)
if type(value) == 'table' then
return super(self, Mixed):load(txn, path, addr)
end
return value
end
function Mixed:save(txn, path, addr, value)
if type(value) == 'table' then
super(self, Mixed):save(txn, path, addr, value)
else Primitive.save(self, txn, path, addr, value) end
end
RootModel = new()
function RootModel:init(txn) super(self, RootModel):init(txn, '/') end
function register(name, path, field)
local field = to_field(field)
function field:compute(txn, pth, addr)
return self:load(txn, '/'..name, path)
end
RootModel[name] = field
end
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