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Better and flexible weight parsing in measure.lua

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Frédéric Rodrigo 2018-06-06 10:53:57 +02:00 committed by Patrick Niklaus
parent d2590989f5
commit 3088dd0342
1 changed files with 12 additions and 25 deletions
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37
profiles/lib/measure.lua
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@ -5,6 +5,7 @@ Measure = {}
-- measurements conversion constants -- measurements conversion constants
local inch_to_meters = 0.0254 local inch_to_meters = 0.0254
local feet_to_inches = 12 local feet_to_inches = 12
local pound_to_kilograms = 0.45359237
--- Parse string as a height in meters. --- Parse string as a height in meters.
--- according to http://wiki.openstreetmap.org/wiki/Key:maxheight --- according to http://wiki.openstreetmap.org/wiki/Key:maxheight
@ -25,33 +26,19 @@ function Measure.parse_value_meters(value)
end end
end end
--- according to http://wiki.openstreetmap.org/wiki/Map_Features/Units#Explicit_specifications --- Parse weight value in kilograms.
local tonns_parse_patterns = Sequence { --- according to https://wiki.openstreetmap.org/wiki/Key:maxweight
"%d+",
"%d+.%d+",
"%d+.%d+ ?t"
}
local kg_parse_patterns = Sequence {
"%d+ ?kg"
}
--- Parse weight value in kilograms
function Measure.parse_value_kilograms(value) function Measure.parse_value_kilograms(value)
-- try to parse kilograms local n = tonumber(value:gsub(",", "."):match("%d+%.?%d*"))
for i, templ in ipairs(kg_parse_patterns) do if n then
m = string.match(value, templ) if string.match(value, "lbs") then
if m then n = n * pound_to_kilograms
return tonumber(m) elseif string.match(value, "kg") then
end -- n = n
end else -- Default, metric tons
n = n * 1000
-- try to parse tonns
for i, templ in ipairs(tonns_parse_patterns) do
m = string.match(value, templ)
if m then
return tonumber(m) * 1000
end end
return n
end end
end end