--[[ Copyright (c) 2012-2013 Kaarle Ritvanen See LICENSE file for license details --]] local M = {} M.error = require('acf2.error') local raise = M.error.raise local relabel = M.error.relabel local combination = require('acf2.model.combination') M.Union = combination.Union M.Range = combination.Range local fld = require('acf2.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('acf2.model.model') M.Action = model.Action M.new = model.new local to_field = model.to_field M.net = require('acf2.model.net') local node = require('acf2.model.node') M.node = {} for _, m in ipairs{ 'List', 'Set', 'TreeNode', 'contains', 'has_permission', 'insert', 'meta', 'mmeta', 'parent', 'path', 'pairs', 'ipairs' } do M.node[m] = node[m] end M.permission = require('acf2.model.permission') M.register = require('acf2.model.root').register M.service = require('acf2.model.service') M.node.Set = require('acf2.model.set').Set local object = require('acf2.object') local class = object.class local isinstance = object.isinstance local super = object.super local pth = require('acf2.path') local util = require('acf2.util') local update = util.update 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' self.dereference = true if not self.scope then self.scope = '/' end self.filter = fld.conv_filter(self.filter) 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 -- assume one-level refs for now function M.Reference:_choice(context) local res = {} local txn = context.txn local obj = relabel('system', txn.fetch, txn, self:abs_scope(context)) assert(isinstance(obj, node.Collection)) for k, v in node.pairs(obj) do local ch = {enabled=true} if isinstance(v, node.TreeNode) then ch.ref = node.path(v) if pth.is_subordinate(context.path, ch.ref) then ch = nil end if ch then ch['ui-value'] = pth.name(ch.ref) ch.value = self.dereference and ch.ref or pth.escape(ch['ui-value']) if self.filter then assert(isinstance(v, model.Model)) if not node.match(v, self.filter) then ch.enabled = false end end end else update(ch, {value=pth.escape(v), ['ui-value']=v}) end if ch then table.insert(res, ch) end end return res end function M.Reference:meta(context) return update( super(self, M.Reference):meta(context), {scope=self:abs_scope(context), dynamic=self.filter and true or false} ) end function M.Reference:follow(context, value) return context.txn:fetch(pth.rawjoin(self:abs_scope(context), value)) end function M.Reference:load(context, options) local ref = super(self, M.Reference):load(context) return ( util.setdefault( options or {}, 'dereference', self.dereference ) and context.txn and ref ) and self:follow(context, ref) or ref end function M.Reference:normalize(context, value) if isinstance(value, node.TreeNode) then value = node.path(value) end local path = context.path if type(value) ~= 'string' then raise(path, 'Path name must be string') end local rel = value if pth.is_absolute(rel) then local scope = self:abs_scope(context) local prefix = scope..'/' if not stringy.startswith(rel, prefix) then raise(path, 'Reference out of scope ('..scope..')') end rel = rel:sub(prefix:len() + 1, -1) end -- assume one-level ref for now if #pth.split(rel) > 1 then raise(path, 'Subtree references not yet supported') end -- TODO check instance type relabel(path, self.follow, self, context, rel) return self.dereference and value or rel, rel 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, editable=self:editable(), layout=self.layout, required=self.required, ui_member=self.ui_member } self.dtype = 'collection' end function M.Collection:auto_ui_name(name) if not name then return end if name:sub(-1, -1) ~= 's' then name = name..'s' end return super(self, M.Collection):auto_ui_name(name) end function M.Collection:load(context, options) if not self.iparams.field then self.iparams.field = to_field(self.type) end return super(self, M.Collection):load(context, options) 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) if not params.widget and isinstance(params.type, M.Reference) then params.widget = 'checkboxes' end 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