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local Tree = {}

Tree.__index = Tree

function Tree:new(id, name, type, children)

local tree = setmetatable({}, Tree)

tree.id = id

tree.name = name

tree.type = type

tree.children = children or {}

return tree

end

-- Calling the tree like a function will create and return children if they are not found.

function Tree:__call(id, name, type)

for _, child in ipairs(self.children) do

if child.id == id then

return child

end

local child = Tree:new(id, name, type)

table.insert(self.children, child)

return child

end

function Tree:flatten_directories()

for _, child in ipairs(self.children) do

if child.type == "dir" and #child.children == 1 and child.children[1].type == "dir" then

child.id = child.children[1].id

child.type = child.children[1].type

child.name = child.children[1].name

child.children = child.children[1].children

self:flatten_directories()

end

return self

end

return Tree