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--[[
Copyright (c) 2012-2013 Kaarle Ritvanen
See LICENSE file for license details
--]]
local M = {}
M.error = require('acf.error')
local raise = M.error.raise
local relabel = M.error.relabel
local combination = require('acf.model.combination')
M.Union = combination.Union
M.Range = combination.Range
local fld = require('acf.model.field')
local Field = fld.Field
M.Boolean = fld.Boolean
M.Integer = fld.Integer
M.Number = fld.Number
M.String = fld.String
local model = require('acf.model.model')
M.Action = model.Action
M.new = model.new
local to_field = model.to_field
M.net = require('acf.model.net')
local node = require('acf.model.node')
M.node = {}
for _, m in ipairs{
'TreeNode',
'has_permission',
'insert',
'meta',
'mmeta',
'path',
'pairs',
'ipairs'
} do M.node[m] = node[m] end
M.permission = require('acf.model.permission')
M.register = require('acf.model.root').register
M.node.Set = require('acf.model.set').Set
local object = require('acf.object')
local class = object.class
local super = object.super
local pth = require('acf.path')
local map = require('acf.util').map
local stringy = require('stringy')
M.Reference = class(Field)
function M.Reference:init(params)
if not params.widget then params.widget = 'reference' end
super(self, M.Reference):init(params)
self.dtype = 'reference'
if not self.scope then self.scope = '/' end
end
function M.Reference:topology(context)
local res = super(self, M.Reference):topology(context)
res[1].scope = self.scope
return res
end
function M.Reference:abs_scope(context)
return pth.to_absolute(self.scope, node.path(context.parent))
end
function M.Reference:meta(context)
local res = super(self, M.Reference):meta(context)
res.scope = self:abs_scope(context)
local txn = context.txn
local objs = txn:get(
node.addr(relabel('system', txn.fetch, txn, res.scope))
) or {}
res.choice = map(function(p) return pth.join(res.scope, p) end, objs)
res['ui-choice'] = objs
return res
end
function M.Reference:follow(context, value)
return context.txn:fetch(pth.rawjoin(self:abs_scope(context), value))
end
function M.Reference:load(context)
local ref = super(self, M.Reference):load(context)
return (context.txn and ref) and self:follow(context, ref) or ref
end
function M.Reference:_validate(context, value)
super(self, M.Reference):_validate(context, value)
if value == nil then return end
if object.isinstance(value, node.TreeNode) then value = node.path(value) end
local path = context.path
if pth.is_absolute(value) then
local scope = self:abs_scope(context)
local prefix = scope..'/'
if not stringy.startswith(value, prefix) then
raise(path, 'Reference out of scope ('..scope..')')
end
value = string.sub(value, string.len(prefix) + 1, -1)
end
-- assume one-level ref for now
if #pth.split(value) > 1 then
raise(path, 'Subtree references not yet supported')
end
-- TODO check instance type
relabel(path, self.follow, self, context, value)
return value
end
function M.Reference:deleted(context, addr)
local target = self:load(context)
if target and node.addr(target) == addr then
-- TODO raise error for the target object
raise(context.path, 'Refers to '..addr)
end
end
M.Model = fld.Model
M.Collection = class(fld.TreeNode)
function M.Collection:init(params, itype)
if params.create == nil then params.create = true end
super(self, M.Collection):init(params)
assert(self.type)
self.itype = itype or node.Collection
self.iparams = {
destroy=self.destroy,
required=self.required,
ui_member=self.ui_member
}
self.dtype = 'collection'
self.widget = self.dtype
end
function M.Collection:auto_ui_name(name)
if not name then return end
if string.sub(name, -1, -1) ~= 's' then name = name..'s' end
return super(self, M.Collection):auto_ui_name(name)
end
function M.Collection:load(context, create)
if not self.iparams.field then self.iparams.field = to_field(self.type) end
return super(self, M.Collection):load(context, create)
end
M.List = class(M.Collection)
function M.List:init(params) super(self, M.List):init(params, node.List) end
M.Set = class(M.Collection)
function M.Set:init(params) super(self, M.Set):init(params, M.node.Set) end
function M.Set.save_member(tn, k, v) node.insert(tn, v) end
-- experimental
M.Mixed = class(M.Collection)
function M.Mixed:init(params)
params.type = M.Mixed
super(self, M.Mixed):init(params, node.Mixed)
self.pfield = Field()
end
function M.Mixed:topology(context) return {} end
function M.Mixed:load(context)
local value = self.pfield:load(context)
if type(value) == 'table' then return super(self, M.Mixed):load(context) end
return value
end
function M.Mixed:save(context, value)
if type(value) == 'table' then super(self, M.Mixed):save(context, value)
else self.pfield:save(context, value) end
end
return M
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