module Data

using Downloads: download
using TOML

import Base: getindex, setindex

struct Source
end

struct Index
    filename::String
    sources::Dict{String, Source}
end

function Index(filename::String)::Index
    sources = Dict{String, Source}()
    return Index(filename, sources)
end

function save(index::Index)
end

function getindex(index::Index, k::String)::Source
    index.sources[k]
end

function setindex!(index::Index, k::String, s::Source)
    index.sources[k] = s
end

end