Add support of maxweight in profiles

profiles/lib/measure.lua

@@ -20,6 +20,17 @@ local feet_parse_patterns = Sequence {
   "%d+\'%d+\'",
 }
 
+--- according to http://wiki.openstreetmap.org/wiki/Map_Features/Units#Explicit_specifications
+local tonns_parse_patterns = Sequence {
+  "%d+",
+  "%d+.%d+",
+  "%d+.%d+ t"
+}
+
+local kg_parse_patterns = Sequence {
+  "%d+ kg"
+}
+
 function Measure.convert_feet_to_inches(feet)
   return feet * feet_to_inches
 end
@@ -51,6 +62,30 @@ function Measure.parse_value_meters(value)
     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
+  for i, templ in ipairs(kg_parse_patterns) do
+    m = string.match(value, templ)
+    if m then
+      return tonumber(m)
+    end
+  end
+
+  -- 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
+
+  --
+  print("Can't parse value: ", value)
   return
 end
 
@@ -69,10 +104,18 @@ end
 function Measure.get_max_width(way)
   raw_value = way:get_value_by_key('maxwidth')
   if raw_value then
-    print(way:id(), raw_value)
     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')
+  if raw_value then
+    -- print(way:id(), raw_value)
+    return Measure.parse_value_kilograms(raw_value)
+  end
+end
+
 
 return Measure;