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|
local gc = require 'gc'
---@class scope.manager
local m = {}
---@alias scope.type '"override"'|'"folder"'|'"fallback"'
---@class scope
---@field type scope.type
---@field uri? uri
---@field _links table<uri, boolean>
---@field _data table<string, any>
---@field _gc gc
---@field _removed? true
local mt = {}
mt.__index = mt
function mt:__tostring()
if self.uri then
return ('{scope|%s|%s}'):format(self.type, self.uri)
else
return ('{scope|%s}'):format(self.type)
end
end
---@param uri uri
function mt:addLink(uri)
self._links[uri] = true
end
---@param uri uri
function mt:removeLink(uri)
self._links[uri] = nil
end
function mt:removeAllLinks()
self._links = {}
end
---@return fun(): uri
---@return table<uri, true>
function mt:eachLink()
return next, self._links
end
---@param uri uri
---@return boolean
function mt:isChildUri(uri)
if not uri then
return false
end
if not self.uri then
return false
end
if self.uri == uri then
return true
end
if uri:sub(1, #self.uri) ~= self.uri then
return false
end
if uri:sub(#self.uri, #self.uri) == '/'
or uri:sub(#self.uri + 1, #self.uri + 1) == '/' then
return true
end
return false
end
---@param uri uri
---@return boolean
function mt:isLinkedUri(uri)
if not uri then
return false
end
for linkUri in pairs(self._links) do
if uri == linkUri then
return true
end
if uri:sub(1, #linkUri) ~= linkUri then
goto CONTINUE
end
if uri:sub(#linkUri, #linkUri) == '/'
or uri:sub(#linkUri + 1, #linkUri + 1) == '/' then
return true
end
::CONTINUE::
end
return false
end
---@param uri uri
---@return boolean
function mt:isVisible(uri)
return self:isChildUri(uri)
or self:isLinkedUri(uri)
or self == m.getScope(uri)
end
---@param uri uri
---@return uri?
function mt:getLinkedUri(uri)
if not uri then
return nil
end
for linkUri in pairs(self._links) do
if uri:sub(1, #linkUri) == linkUri then
return linkUri
end
end
return nil
end
---@param uri uri
---@return uri?
function mt:getRootUri(uri)
if self:isChildUri(uri) then
return self.uri
end
return self:getLinkedUri(uri)
end
---@param k string
---@param v any
function mt:set(k, v)
self._data[k] = v
return v
end
---@param k string
---@return any
function mt:get(k)
return self._data[k]
end
---@return string
function mt:getName()
return self.uri or ('<' .. self.type .. '>')
end
function mt:gc(obj)
self._gc:add(obj)
end
function mt:flushGC()
self._gc:remove()
if self._removed then
return
end
self._gc = gc()
end
function mt:remove()
if self._removed then
return
end
self._removed = true
for i, scp in ipairs(m.folders) do
if scp == self then
table.remove(m.folders, i)
break
end
end
self:flushGC()
end
function mt:isRemoved()
return self._removed == true
end
---@param scopeType scope.type
---@return scope
local function createScope(scopeType)
local scope = setmetatable({
type = scopeType,
_links = {},
_data = {},
_gc = gc(),
}, mt)
return scope
end
function m.reset()
---@type scope[]
m.folders = {}
m.override = createScope 'override'
m.fallback = createScope 'fallback'
end
m.reset()
---@param uri uri
---@return scope
function m.createFolder(uri)
local scope = createScope 'folder'
scope.uri = uri
local inserted = false
for i, otherScope in ipairs(m.folders) do
if #uri > #otherScope.uri then
table.insert(m.folders, i, scope)
inserted = true
break
end
end
if not inserted then
table.insert(m.folders, scope)
end
return scope
end
---@param uri uri
---@return scope?
function m.getFolder(uri)
for _, scope in ipairs(m.folders) do
if scope:isChildUri(uri) then
return scope
end
end
return nil
end
---@param uri uri
---@return scope?
function m.getLinkedScope(uri)
if m.override and m.override:isLinkedUri(uri) then
return m.override
end
for _, scope in ipairs(m.folders) do
if scope:isLinkedUri(uri) then
return scope
end
end
if m.fallback:isLinkedUri(uri) then
return m.fallback
end
return nil
end
---@param uri uri
---@return scope
function m.getScope(uri)
return m.getFolder(uri)
or m.getLinkedScope(uri)
or m.fallback
end
return m
|
