LoTROInterface SVN SequenceBars

Series = class(Turbine.Object);

Thurallor.Utils.Series = Series;

function Series:Constructor(str)

    -- Eliminate unneeded chars

    str = string.gsub(str, "([0-9]) +([0-9])", "%1;%2"); -- accept space-delimited numbers

    str = string.gsub(str, "[^0-9,;.-]", "");            -- remove garbage chars

    str = string.gsub(str, "^[^0-9]+", "");              -- remove leading nonnumeric chars

    str = string.gsub(str, "[^0-9]$", "");               -- remove trailing nonnumeric chars

    str = string.gsub(str, "%.+", "-");                  -- replace "..." with "-"

    str = string.gsub(str, ",", ";");                    -- replace "," with ";"

    str = string.gsub(str, "[^0-9][^0-9]+", ";");        -- eliminate unterminated ranges

    self.str = str;

    self.caret = 1;

    self.prev = nil;

end

-- For-loop expression for getting the numbers in order (with optional "safety" limit value)

function Series:numbers(safety)

    self.safety = safety;

    self.iterator = function(state, num)

        local last = state[4];

        if (last) then

            -- Continue current interval

            if (num < last) then

                return num + 1;

            elseif (num > last) then

                return num - 1;

            end

        end

        -- End of interval; get the next semicolon-delimited element from self.str

        local f, s, var = unpack(state);

        var = f(s, var);

        if (var == nil) then

            return nil;

        end

        -- Get the next range and apply "safety" limit (if any)

        local first = tonumber(string.match(var, "^[0-9]+"));

        last = tonumber(string.match(var, "[0-9]+$"));

        if (self.safety) then

            first = math.min(first, self.safety);

            last = math.min(last, self.safety);

        end

        -- Save end of range; return first number in range

        state[4] = last;

        return first;

    end

    -- Iterate over semicolon-delimited elements in self.str

    return self.iterator, { string.gmatch(self.str, "[^;]+") };

end

function Series:tostring()

    local str = string.gsub(self.str, "-", "...");   -- replace "..." with "-"

    return str;

end