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Profile: stronger unit parsing

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Frédéric Rodrigo 2017-10-09 18:34:21 +02:00 committed by Patrick Niklaus
parent c7b1d0c131
commit ddf11cc2cc
1 changed files with 24 additions and 58 deletions
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82
profiles/lib/measure.lua
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@ -6,66 +6,38 @@ Measure = {}
local inch_to_meters = 0.0254
local feet_to_inches = 12
--- Parse string as a height in meters.
--- according to http://wiki.openstreetmap.org/wiki/Key:maxheight
local meters_parse_patterns = Sequence {
"%d+",
"%d+.%d+",
"%d+.%d+ m",
"%d+,%d+ m", -- wrong
"%d+.%d+m", -- wrong
"%d+,%d+m", -- wrong
}
function Measure.parse_value_meters(value)
local n = tonumber(value:gsub(",", "."):match("%d+%.?%d*"))
if n then
inches = value:match("'.*")
if inches then -- Imperial unit to metric
-- try to parse feets/inch
n = n * feet_to_inches
local m = tonumber(inches:match("%d+"))
if m then
n = n + m
end
n = n * inch_to_meters
end
return n
end
local feet_parse_patterns = Sequence {
"%d+\'%d+\'",
}
print("Can't parse value: ", value)
end
--- according to http://wiki.openstreetmap.org/wiki/Map_Features/Units#Explicit_specifications
local tonns_parse_patterns = Sequence {
"%d+",
"%d+.%d+",
"%d+.%d+ t"
"%d+.%d+ ?t"
}
local kg_parse_patterns = Sequence {
"%d+ kg"
"%d+ ?kg"
}
function Measure.convert_feet_to_inches(feet)
return feet * feet_to_inches
end
function Measure.convert_inches_to_meters(inches)
return inches * inch_to_meters
end
--- Parse string as a height in meters.
function Measure.parse_value_meters(value)
-- try to parse meters
for i, templ in ipairs(meters_parse_patterns) do
m = string.match(value, templ)
if m then
return tonumber(m)
end
end
-- try to parse feets/inch
for i, templ in ipairs(feet_parse_patterns) do
m = string.match(value, templ)
if m then
feet, inch = m
feet = tonumber(feet)
inch = tonumber(inch)
inch = inch + feet * feet_to_inches
return Measure.convert_inches_to_meters(inch)
end
end
print("Can't parse value: ", value)
return
end
--- Parse weight value in kilograms
function Measure.parse_value_kilograms(value)
-- try to parse kilograms
@ -91,31 +63,25 @@ end
--- Get maxheight of specified way in meters. If there are no
--- max height, then return nil
function Measure.get_max_height(way)
raw_value = way:get_value_by_key('maxheight')
function Measure.get_max_height(raw_value)
if raw_value then
return Measure.parse_value_meters(raw_value)
end
-- TODO: parse another tags
end
--- Get maxwidth of specified way in meters.
function Measure.get_max_width(way)
raw_value = way:get_value_by_key('maxwidth')
function Measure.get_max_width(raw_value)
if raw_value then
return Measure.parse_value_meters(raw_value)
end
end
--- Get maxweight of specified way in kilogramms
function Measure.get_max_weight(way)
raw_value = way:get_value_by_key('maxweight')
function Measure.get_max_weight(raw_value)
if raw_value then
-- print(way:id(), raw_value)
return Measure.parse_value_kilograms(raw_value)
end
end
return Measure;
return Measure;