Modul:Coordinate

Moduldokumentasjon
local math = require('Module:Math');

-------------------------------------------------------------------------------
-- Coordinate class
-------------------------------------------------------------------------------
local Coordinate = {}

-------------------------------------------------------------------------------
-- Creates a new coordinate object.
-- @param o
--
function Coordinate:new(frame)
    local o = {}                -- create object
    meta = {__index = self}     -- 
    setmetatable(o, meta)       -- 

    o:init(frame)               -- do some initialization

    --[[
    o.fromWikidata = function(latitude, longitude, precision)
      return self:fromWikidata(latitude, longitude, precision)
    end
    o.formatForTitle = function(frame)
        return self:formatForTitle()
    end
    o.formatForInline = function(frame)
        return self:formatForInline()
    end
    ]]

    return o
end

-------------------------------------------------------------------------------
-- Initialize the coordinate object
--
function Coordinate:init( frame )

    -- store the frame
    self.frame = frame

    -- We use DMS for internal storage
    self.lat = { deg = nil, min = nil, sec = nil, sign = nil }
    self.long = { deg = nil, min = nil, sec = nil, sign = nil }


end

function Coordinate:parseDecimal( value, precision )
    local o = {}
    o.sign = (value < 0 and -1 or 1)

    value = math.abs(value)
    value = math.floor(value/precision + 1/2) * precision

    o.deg = math.floor(value)     -- degrees
    value = (value - o.deg) * 60
    o.min = math.floor(value)     -- arcminutes
    o.sec = (value - o.min) * 60    -- arcseconds

    -- Unless precision is higher than to an arcsecond, we round off
    if (precision >= 1/3600.001) then o.sec = math.floor(o.sec + 1/2) end
    if (o.sec >= 60) then
        o.sec = o.sec - 60
        o.min = o.min + 1
    end
    if (o.min == 60) then
        o.min = 0
        o.deg = o.deg + 1
    end

    -- om precision är 1/3600 (eller mindre) blir format = dms
    -- om precision är mellan 1/3600 och 1/60 blir format = dm
    -- om precision är större än 1/60 blir format = d

    -- If precision less than 1/3600
    if (precision < 1/3600.01) then
        o.sec = nil
    end

    -- If precision less than 1/60
    if (precision < 1/60.01) then
        o.min = nil
    end

    return o
end

function Coordinate:fromDecimal( latitude, longitude, precision )

    if (precision == nil) then
        precision = 1/3600      -- set default precision to one arcsecond (1/3600 degree)
    end

    self.lat = Coordinate.parseDecimal(latitude, precision)
    self.long = Coordinate.parseDecimal(longitude, precision)

    --[[
    local antal_decimaler = 3
    if (prec >= 1e-8) then antal_decimaler = math.max(0,math.floor(-math.log(prec*3600)/math.log(10)+0.5)) end

    local format = coordinates.wdprec2dms(frame)
    if (format == 'd') then frame.args = {latd .. "", latNS, longd .. "", longEW, display=disp, 'region:'..reg..'_type:'..type..'_source:Wikidata'} end
    if (format == 'dm') then frame.args = {latd .. "", latm .. "", latNS, longd .. "", longm .. "", longEW, display=disp, 'region:'..reg..'_type:'..type..'_source:Wikidata'} end
    if (format == 'dms') then frame.args = {latd .. "", latm .. "", string.format('%2.'..antal_decimaler..'f',lats) .. "",latNS, longd .. "", longm .. "",string.format('%2.'..antal_decimaler..'f',longs) .. "",longEW, display=disp, 'region:'..reg..'_type:'..type..'_source:Wikidata'} end
    return coordinates.local_coord(frame)
    ]]
end


-------------------------------------------------------------------------------
-- Returns the coordinate formatted for title
--
function Coordinate:formatForTitle()

    return nil

end

return Coordinate