Module:Remove Duplicate Links

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This documentation is transcluded from Module:Remove Duplicate Links/doc. Changes can be proposed in the talk page.

This module is unused.

This module is neither invoked by a template nor required/loaded by another module. If this is in error, make sure to add {{Documentation}}/{{No documentation}} to the calling template's or parent's module documentation.

Function list
L 3 — startsWith L 8 — p.main

---

local p = {}

function startsWith(str, start)
   return str:sub(1, #start) == start
end

--- Remove duplicate links and return the singular ones
function p.main(frame)
    local input = frame.args[1] or ""

    local links = {}
    input:gsub("%[%[([^%]]*)%]%]", function(link)
        link = "[[" .. link .. "]]" -- :gsub removes the double brackets
        if frame.args["removeFiles"] == "yes" and not startsWith(string.lower(link), "file:") then 
        	table.insert(links, link)
        end
    end)

    local duplicateTracker = {}
    for _, link in pairs(links) do
        if not duplicateTracker[link] then
            duplicateTracker[link] = 0
        end
        duplicateTracker[link] = duplicateTracker[link] + 1
    end

    local output = ""
    for link, duplicates in pairs(duplicateTracker) do
        if duplicates == 1 then
            output = output .. link
        end
    end

    return output
end

return p