Module:Ask

Documentation for this module may be created at Module:Ask/doc

local p = {}

-- Force-load SMW if it isn't available yet (works on all SMW 4.x wikis)
local function getSMW()
    local smw = mw.smw
    if smw then return smw end

    -- Dummy query forces SMW to initialise the Lua library
    pcall(function()
        mw.getCurrentFrame():preprocess '{{#ask: [[Category:__SMW_DUMMY_NEVER_MATCH__]] |limit=0}}'
    end)

    return mw.smw
end

function p.query(frame)
    local smw = getSMW()
    if not smw then
        return '<strong class="error">Semantic MediaWiki Lua interface not available on this wiki.</strong>'
    end

    local args = frame.args
    local conditions = args.conditions or args[1] or '[[Category:Example]]'

    -- Build the query table
    local query = {}
    for line in mw.text.gsplit(conditions, '\n', true) do
        line = mw.text.trim(line)
        if line ~= '' then
            table.insert(query, line)
        end
    end

    -- Add default printouts if none given
    if not string.find(conditions, '|%?') then
        table.insert(query, '?Modification date')  -- fallback
    end

    -- Optional parameters
    if args.limit then table.insert(query, 'limit=' .. args.limit) end
    if args.sort then table.insert(query, 'sort=' .. args.sort) end
    if args.order then table.insert(query, 'order=' .. args.order) end

    local results = smw.ask(query)

    if not results or #results == 0 then
        return "''No results found.''"
    end

    -- Simple wikitable output
    local out = {'{| class="wikitable sortable"\n! Page'}
    for _, row in ipairs(results) do
        local printouts = {}
        for key, values in pairs(row.printouts) do
            if not key:find('^_') then  -- skip internal properties
                table.insert(printouts, tostring(values[1] or ''))
            end
        end
        table.insert(out, '|- \n| [[' .. row.fulltext .. ']] || ' .. table.concat(printouts, ' || '))
    end
    table.insert(out, '|}\n')
    return table.concat(out)
end

return p