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---@class cmp.Cache
---@field public entries any
local cache = {}
cache.new = function()
local self = setmetatable({}, { __index = cache })
self.entries = {}
return self
end
---Get cache value
---@param key string
---@return any|nil
cache.get = function(self, key)
key = self:key(key)
if self.entries[key] ~= nil then
return self.entries[key]
end
return nil
end
---Set cache value explicitly
---@param key string
---@vararg any
cache.set = function(self, key, value)
key = self:key(key)
self.entries[key] = value
end
---Ensure value by callback
---@param key string
---@param callback fun(): any
cache.ensure = function(self, key, callback)
local value = self:get(key)
if value == nil then
local v = callback()
self:set(key, v)
return v
end
return value
end
---Clear all cache entries
cache.clear = function(self)
self.entries = {}
end
---Create key
---@param key string|table
---@return string
cache.key = function(_, key)
if type(key) == 'table' then
return table.concat(key, ':')
end
return key
end
return cache
|
