Module:Authors Q

-- Fetch authors from Wikidata --

p = {}

function p.getAuthors(frame) local args= frame.args if not args.qid and not args[1] then args = frame:getParent.args end

local qid = mw.text.trim(args[1] or args.qid or "") if qid == "" then qid = mw.wikibase.getEntityIdForCurrentPage end if not qid then return end

-- construct a table of tables: -- key = series ordinal; -- value = {name=author's name, orcid=author's orcid id, emp=author's employer} local auths = {} -- series ordinal = true when used local ords = {} -- list of employers local emps = {} -- keep track of values without series ordinals and max ordinal local noord = 0 local maxord = 0 -- get authors that have entries local prop50 = mw.wikibase.getBestStatements(qid, "P50") for i, v in ipairs(prop50) do		if v.mainsnak.snaktype == "value" then -- get author's qid local nameid = v.mainsnak.datavalue.value.id			-- get author's name local name = mw.wikibase.getLabel(nameid) or "No label" -- get author's orcid id			local orcid local orcidtbl = mw.wikibase.getBestStatements(nameid, "P496")[1] if orcidtbl and orcidtbl.mainsnak.snaktype == "value" then orcid = orcidtbl.mainsnak.datavalue.value end -- get author's employer local emp local emptbl = mw.wikibase.getBestStatements(nameid, "P108")[1] if emptbl and emptbl.mainsnak.snaktype == "value" then emp = mw.wikibase.getLabel(emptbl.mainsnak.datavalue.value.id) end if emp then emps[emp] = true end -- get ordinal local ordinal = noord if v.qualifiers then qualP1545 = v.qualifiers["P1545"] and v.qualifiers["P1545"][1] if qualP1545 then ordinal = tonumber(qualP1545.datavalue.value) or noord end end if ordinal == noord then noord = noord -1 end -- check for a duplicate ordinal if ords[ordinal] then repeat ordinal = ordinal + 1 until not ords[ordinal] end auths[ordinal] = {name = name, orcid = orcid, emp = emp} ords[ordinal] = true if ordinal > maxord then maxord = ordinal end end end

-- add author's name strings to the author's table local propP2093 = mw.wikibase.getBestStatements(qid, "P2093") for i, v in ipairs(propP2093) do		if v.mainsnak.snaktype == "value" then local name = v.mainsnak.datavalue.value local ordinal = noord if v.qualifiers then qualP1545 = v.qualifiers["P1545"] and v.qualifiers["P1545"][1] if qualP1545 then ordinal = tonumber(qualP1545.datavalue.value) or noord end end if ordinal == noord then noord = noord -1 end -- check for a duplicate ordinal if ords[ordinal] then repeat ordinal = ordinal + 1 until not ords[ordinal] end auths[ordinal] = {name = name} ords[ordinal] = true if ordinal > maxord then maxord = ordinal end end end

-- compact the auths table into a sequence local authors = {} for idx = 1, maxord do		if auths[idx] then table.insert(authors, auths[idx]) end end for idx = 0, noord, -1 do		if auths[idx] then table.insert(authors, auths[idx]) end end

-- create a sequence of employers local employers = {} for k, v in pairs(emps) do		table.insert(employers, k)	end

-- construct some output out = {} for i, v in ipairs(authors) do		out[i] = v.name if v.orcid then out[i] = out[i] .. " "		end if v.emp then out[i] = out[i] .. frame:expandTemplate{title = 'efn', args = {name=v.emp, v.emp} } end end -- glue the list of authors together as a comma separated list local returntxt = " " .. table.concat(out, ", ") .. " "	return returntxt end

return p