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local util = require 'utility'
local scope= require 'workspace.scope'
---@class vm.node.global.link
---@field gets parser.object[]
---@field sets parser.object[]
---@class vm.node.global
---@field links table<uri, vm.node.global.link>
---@field setsCache table<uri, parser.object[]>
---@field getsCache table<uri, parser.object[]>
---@field cate vm.global.cate
local mt = {}
mt.__index = mt
mt.type = 'global'
mt.name = ''
---@param uri uri
---@param source parser.object
function mt:addSet(uri, source)
local link = self.links[uri]
link.sets[#link.sets+1] = source
self.setsCache = nil
end
---@param uri uri
---@param source parser.object
function mt:addGet(uri, source)
local link = self.links[uri]
link.gets[#link.gets+1] = source
self.getsCache = nil
end
---@return parser.object[]
function mt:getSets(suri)
if not self.setsCache then
self.setsCache = {}
end
---@type scope
local scp = suri and scope.getScope(suri) or nil
local cacheUri = scp and scp.uri or '<fallback>'
if self.setsCache[cacheUri] then
return self.setsCache[cacheUri]
end
self.setsCache[cacheUri] = {}
local cache = self.setsCache[cacheUri]
for uri, link in pairs(self.links) do
if not scp
or scp:isChildUri(uri)
or scp:isLinkedUri(uri) then
for _, source in ipairs(link.sets) do
cache[#cache+1] = source
end
end
end
return cache
end
---@return parser.object[]
function mt:getGets(suri)
if not self.getsCache then
self.getsCache = {}
end
---@type scope
local scp = suri and scope.getScope(suri) or nil
local cacheUri = scp and scp.uri or '<fallback>'
if self.getsCache[cacheUri] then
return self.getsCache[cacheUri]
end
self.getsCache[cacheUri] = {}
local cache = self.getsCache[cacheUri]
for uri, link in pairs(self.links) do
if not scp
or scp:isChildUri(uri)
or scp:isLinkedUri(uri) then
for _, source in ipairs(link.gets) do
cache[#cache+1] = source
end
end
end
return cache
end
---@param uri uri
function mt:dropUri(uri)
self.links[uri] = nil
self.setsCache = nil
self.getsCache = nil
end
---@return string
function mt:getName()
return self.name
end
---@return boolean
function mt:isAlive()
return next(self.links) ~= nil
end
---@param cate vm.global.cate
---@return vm.node.global
return function (name, cate)
return setmetatable({
name = name,
cate = cate,
links = util.defaultTable(function ()
return {
sets = {},
gets = {},
}
end),
}, mt)
end
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