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--[[
Copyright (c) 2012-2015 Kaarle Ritvanen
See LICENSE file for license details
--]]
local M = {}
local model = require('aconf.model.model')
local node = require('aconf.model.node')
local object = require('aconf.object')
local pth = require('aconf.path')
local address = require('aconf.path.address')
local util = require('aconf.util')
local setdefault = util.setdefault
M.RootModel = model.new()
function M.RootModel:init(context)
object.super(self, M.RootModel):init(
util.update(context, {path='/', addr='/null'})
)
end
function M.RootModel:has_permission(user, permission)
return permission == 'read'
end
function M.RootModel:meta(path)
local obj = self:fetch(path, true)
if object.isinstance(obj, node.TreeNode) then return node.meta(obj) end
return node.mmeta(self:fetch(pth.parent(path), true), pth.name(path))
end
local _topology = {}
local order = 0
function M.topology(addr, create)
local top = _topology
if type(addr) == 'table' then addr = util.copy(addr)
else addr = address.split(addr) end
local function defaults(top)
return util.setdefaults(top, {members={}, paths={}, referrers={}})
end
while #addr > 0 do
local comp = address.escape(addr[1])
if create then
top = setdefault(defaults(top).members, comp, {order=order})
order = order + 1
else
top = top.members[comp] or top.members['*']
if not top then return end
end
table.remove(addr, 1)
end
return defaults(top)
end
function M.register(name, field, params)
if not params then params = {} end
params.create = true
M.RootModel[name] = model.to_field(field, params)
local root = M.RootModel{}
for _, record in ipairs(node.topology(root:fetch(name))) do
local top = M.topology(record.addr, true)
local function set(k, v)
setdefault(top, k, v)
assert(top[k] == v)
end
set('type', record.type)
table.insert(top.paths, record.path)
if record.scope then
local scope = node.addr(
root:fetch(pth.to_absolute(record.scope, pth.parent(record.path)))
)
set('scope', scope)
table.insert(
M.topology(pth.rawjoin(scope, record.search), true).referrers,
record.path
)
end
end
end
return M
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