FANDOM


-- Table constructor
 
local p = {}
 
local function delimiterPositions(wikitable, delimiter)
    -- Gets the positions and number of instances of a delimiter in a table's wikitext. By "position", we mean that, for example, the letter "e" in "hello" is in position 2, and the pattern "ll" in "hello" is in position 3.
    local positions = {}
    local index = 1
 
    for pos = 1, string.len(wikitable) - 1 do
        if string.sub(wikitable, pos, pos + 1) == delimiter then
            positions[index] = pos
            index = index + 1
        end
    end
 
    positions[index] = string.len(wikitable) - 1
 
    return {positions, index - 1}
end
 
local function rowPositions(wikitable)
    -- Gets the positions of instances of the row delimiter |- in a table's wikitext.
    return delimiterPositions(wikitable, "|-")[1]
end
 
local function rows(wikitable)
    -- Gets the number of rows in a table's wikitext.
    return delimiterPositions(wikitable, "|-")[2]
end
 
local function fetchRows(wikitable, firstRow, lastRow)
    -- Gets the contents of the rows between firstRow and lastRow inclusively. For example, fetchRows(wikitable, 3, 7) returns rows 3, 4, 5, 6, and 7 of the table.
    local rowP = rowPositions(wikitable)
    return string.sub(wikitable, rowP[firstRow], rowP[lastRow + 1])
end
 
local function fetchOneRow(wikitable, row)
    -- Gets the contents of a single row.
    return fetchRows(wikitable, row, row)
end
 
local function columns(wikitable)
    -- Gets the names of the columns.
    names = {}
    posTable = delimiterPositions(wikitable, "!", "|-")
    for n = 1, posTable[2] do
        names[n] = string.sub(wikitable, posTable[1][n] + 1, posTable[1][n + 1] - 1)
    end
    return names
end
 
function p.partialTable(frame)
    local wikitable = frame.args[1]
    local rowP = rowPositions(wikitable)
    local length = rows(wikitable)[2]
    local firstRow = math.max(frame.args[2], 1) or 1
    local lastRow = math.min(frame.args[3], length) or length
    local header = string.sub(wikitable, 1, rowP[1] - 1)
    local body = fetchRows(wikitable, firstRow, lastRow)
    return header .. body .. "}"
end
 
return p
 
--[[Category:Modules]]
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