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-- Copyright © 2017–2019 Albert Krewinkel, Robert Winkler
--
-- This library is free software; you can redistribute it and/or modify it
-- under the terms of the MIT license. See LICENSE for details.
local _version = '1.0.0'
local properties_and_aliases = {
agrees_with = {
'agree_with'
},
citation = {
},
cites = {
},
cites_as_authority = {
'as_authority',
'authority'
},
cites_as_data_source = {
"as_data_source",
"data_source"
},
cites_as_evidence = {
'as_evidence',
'evidence'
},
cites_as_metadata_document = {
'as_metadata_document',
'metadata_document',
'metadata'
},
cites_as_recommended_reading = {
'as_recommended_reading',
'recommended_reading'
},
disagrees_with = {
'disagree',
'disagrees'
},
disputes = {
},
documents = {
},
extends = {
},
includes_excerpt_from = {
'excerpt',
'excerpt_from'
},
includes_quotation_from = {
'quotation',
'quotation_from'
},
obtains_background_from = {
'background',
'background_from'
},
refutes = {
},
replies_to = {
},
updates = {
},
uses_data_from = {
'data',
'data_from'
},
uses_method_in = {
'method',
'method_in'
},
}
local default_cito_property = 'citation'
--- Map from cito aliases to the actual cito property.
local properties_by_alias = {}
for property, aliases in pairs(properties_and_aliases) do
-- every property is an alias for itself
properties_by_alias[property] = property
for _, alias in pairs(aliases) do
properties_by_alias[alias] = property
end
end
--- Split citation ID into cito property and the actual citation ID. If
--- the ID does not seem to contain a CiTO property, the
--- `default_cito_property` will be returned, together with the
--- unchanged input ID.
local function split_cito_from_id (citation_id)
local pattern = '^(.+):(.+)$'
local prop_alias, split_citation_id = citation_id:match(pattern)
if properties_by_alias[prop_alias] then
return properties_by_alias[prop_alias], split_citation_id
end
return default_cito_property, citation_id
end
--- Citations by CiTO properties.
local function store_cito (cito_cites, prop, cite_id)
if not prop then
return
end
if not cito_cites[prop] then
cito_cites[prop] = {}
end
table.insert(cito_cites[prop], cite_id)
end
--- Returns a Cite filter function which extracts CiTO information and
--- add it to the given collection table.
local function extract_cito (cito_cites)
return function (cite)
for k, citation in pairs(cite.citations) do
local cito_prop, cite_id = split_cito_from_id(citation.id)
store_cito(cito_cites, cito_prop, cite_id)
citation.id = cite_id
end
return cite
end
end
--- Lists of citation IDs, indexed by CiTO properties.
local citations_by_property = {}
return {
{
Cite = extract_cito(citations_by_property)
},
{
Meta = function (meta)
meta.cito_cites = citations_by_property
return meta
end
}
}
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