Documentation for this module may be created at Module:SMWUtils/doc
-- Module:SMWUtils
-- Utility functions for Semantic MediaWiki queries
-- Uses frame:preprocess() since Semantic Scribunto is not installed
local p = {}
local function trim(s)
if s == nil then return nil end
s = tostring(s)
s = s:gsub('^%s+', ''):gsub('%s+$', '')
if s == '' then return nil end
return s
end
--- Find all results where a chained property equals its minimum value
-- Uses a two-pass approach: first find min, then query for all matching
-- @param frame Frame object with args:
-- conditions: SMW query conditions (e.g., "[[Has video signal format::Component (YPbPr)]]")
-- minProperty: Property to find minimum of (e.g., "Has CRT model.Has screen size inches")
-- printouts: Comma-separated list of properties to display
-- format: Output format (table, ul, ol) - default "table"
-- headers: Comma-separated header names for table format
-- intro: Optional intro text
-- @return Wikitext output
function p.findAllWithMin(frame)
local args = frame.args
local conditions = trim(args.conditions) or ''
local minProperty = trim(args.minProperty)
local printouts = trim(args.printouts) or ''
local format = trim(args.format) or 'table'
local headers = trim(args.headers) or ''
local intro = trim(args.intro)
if not minProperty then
return '<span class="error">Error: minProperty is required</span>'
end
-- Step 1: Find the minimum value using a sorted query with limit=1
local minQueryWikitext = '{{#ask:' .. conditions .. '\n' ..
'|?' .. minProperty .. '\n' ..
'|sort=' .. minProperty .. '\n' ..
'|order=asc\n' ..
'|limit=1\n' ..
'|format=broadtable\n' ..
'|headers=hide\n' ..
'|link=none\n' ..
'}}'
local minResult = frame:preprocess(minQueryWikitext)
-- Parse the minimum value from the table result
local minValue = nil
if minResult then
-- Extract from last <td> in the row (the property value)
for cellContent in minResult:gmatch('<td[^>]*>(.-)</td>') do
local cleanContent = cellContent:gsub('<[^>]+>', '')
local numVal = tonumber(trim(cleanContent))
if numVal then
minValue = numVal
end
end
end
if minValue == nil then
return "No results found or could not determine minimum value."
end
-- Step 2: Query for all results matching this minimum value
local printoutList = {}
for prop in printouts:gmatch('[^,]+') do
table.insert(printoutList, '|?' .. trim(prop))
end
local fullQueryWikitext = '{{#ask:' .. conditions .. '\n' ..
'[[' .. minProperty .. '::' .. minValue .. ']]\n' ..
table.concat(printoutList, '\n') .. '\n' ..
'|sort=' .. minProperty .. '\n' ..
'|limit=100\n' ..
'|format=broadtable\n' ..
'|headers=hide\n' ..
'|link=all\n' ..
'}}'
local fullResult = frame:preprocess(fullQueryWikitext)
-- Parse results from HTML table
local results = p._parseTableResults(fullResult, printouts)
if #results == 0 then
return "No results found matching minimum value " .. minValue .. "."
end
-- Build output
local headerList = {}
for h in headers:gmatch('[^,]+') do
table.insert(headerList, trim(h))
end
local printoutProps = {}
for prop in printouts:gmatch('[^,]+') do
table.insert(printoutProps, trim(prop))
end
local introText = intro or ("Smallest screen size with this input: '''" .. minValue .. "\"'''")
if format == 'table' then
return p._formatTableFromParsed(results, printoutProps, headerList, introText)
elseif format == 'ul' or format == 'ol' then
return p._formatListFromParsed(results, format, introText)
else
return p._formatTableFromParsed(results, printoutProps, headerList, introText)
end
end
--- Find all results where a property equals its maximum value
function p.findAllWithMax(frame)
local args = frame.args
local conditions = trim(args.conditions) or ''
local maxProperty = trim(args.maxProperty)
local printouts = trim(args.printouts) or ''
local format = trim(args.format) or 'table'
local headers = trim(args.headers) or ''
local intro = trim(args.intro)
if not maxProperty then
return '<span class="error">Error: maxProperty is required</span>'
end
-- Step 1: Find the maximum value using a sorted query with limit=1
local maxQueryWikitext = '{{#ask:' .. conditions .. '\n' ..
'|?' .. maxProperty .. '\n' ..
'|sort=' .. maxProperty .. '\n' ..
'|order=desc\n' ..
'|limit=1\n' ..
'|format=broadtable\n' ..
'|headers=hide\n' ..
'|link=none\n' ..
'}}'
local maxResult = frame:preprocess(maxQueryWikitext)
-- Parse the maximum value from the table result
local maxValue = nil
if maxResult then
for cellContent in maxResult:gmatch('<td[^>]*>(.-)</td>') do
local cleanContent = cellContent:gsub('<[^>]+>', '')
local numVal = tonumber(trim(cleanContent))
if numVal then
maxValue = numVal
end
end
end
if maxValue == nil then
return "No results found or could not determine maximum value."
end
-- Step 2: Query for all results matching this maximum value
local printoutList = {}
for prop in printouts:gmatch('[^,]+') do
table.insert(printoutList, '|?' .. trim(prop))
end
local fullQueryWikitext = '{{#ask:' .. conditions .. '\n' ..
'[[' .. maxProperty .. '::' .. maxValue .. ']]\n' ..
table.concat(printoutList, '\n') .. '\n' ..
'|sort=' .. maxProperty .. '\n' ..
'|limit=100\n' ..
'|format=broadtable\n' ..
'|headers=hide\n' ..
'|link=all\n' ..
'}}'
local fullResult = frame:preprocess(fullQueryWikitext)
-- Parse results from HTML table
local results = p._parseTableResults(fullResult, printouts)
if #results == 0 then
return "No results found matching maximum value " .. maxValue .. "."
end
-- Build output
local headerList = {}
for h in headers:gmatch('[^,]+') do
table.insert(headerList, trim(h))
end
local printoutProps = {}
for prop in printouts:gmatch('[^,]+') do
table.insert(printoutProps, trim(prop))
end
local introText = intro or ("Largest screen size with this input: '''" .. maxValue .. "\"'''")
if format == 'table' then
return p._formatTableFromParsed(results, printoutProps, headerList, introText)
elseif format == 'ul' or format == 'ol' then
return p._formatListFromParsed(results, format, introText)
else
return p._formatTableFromParsed(results, printoutProps, headerList, introText)
end
end
-- Internal: Parse HTML table results into a Lua table
function p._parseTableResults(htmlResult, printouts)
local results = {}
if not htmlResult then
return results
end
-- Count expected columns from printouts
local numPrintouts = 0
for _ in printouts:gmatch('[^,]+') do
numPrintouts = numPrintouts + 1
end
-- Match each table row
for rowContent in htmlResult:gmatch('<tr[^>]*>(.-)</tr>') do
local cells = {}
-- Extract content from each <td>, preserving HTML for links
for cellContent in rowContent:gmatch('<td[^>]*>(.-)</td>') do
table.insert(cells, cellContent)
end
-- First cell is usually the page link, rest are printout values
if #cells >= 1 then
table.insert(results, cells)
end
end
return results
end
-- Internal: Format parsed results as a wikitable
function p._formatTableFromParsed(results, printouts, headers, introText)
local output = {}
table.insert(output, introText .. "\n\n")
table.insert(output, '{| class="wikitable sortable"\n')
-- Header row
table.insert(output, '|-\n! #')
for i, prop in ipairs(printouts) do
local headerText = headers[i] or prop:gsub('.*%.', ''):gsub('Has ', '')
table.insert(output, ' !! ' .. headerText)
end
table.insert(output, '\n')
-- Data rows
for i, row in ipairs(results) do
table.insert(output, '|-\n| ' .. tostring(i))
for j = 1, #printouts do
local cellVal = row[j] or ''
table.insert(output, ' || ' .. cellVal)
end
table.insert(output, '\n')
end
table.insert(output, '|}')
return table.concat(output)
end
-- Internal: Format parsed results as a list
function p._formatListFromParsed(results, listType, introText)
local output = {}
local bullet = listType == 'ol' and '#' or '*'
table.insert(output, introText .. "\n\n")
for _, row in ipairs(results) do
local parts = {}
for _, cell in ipairs(row) do
if cell and cell ~= '' then
table.insert(parts, cell)
end
end
table.insert(output, bullet .. ' ' .. table.concat(parts, ' – ') .. '\n')
end
return table.concat(output)
end
return p
