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Add geometry collection support for contains #13

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Add geometry collection support for contains #13

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6 changes: 5 additions & 1 deletion lib/topo/contains.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ defmodule Topo.Contains do
| %Geo.Polygon{}
| %Geo.MultiPolygon{}

@spec contains?(geo_struct, geo_struct) :: boolean
@spec contains?(geo_struct | %Geo.GeometryCollection{}, geo_struct) :: boolean
def contains?(%Geo.Point{} = a, %Geo.Point{} = b), do: a == b
def contains?(%Geo.Point{} = a, %Geo.MultiPoint{} = b), do: contains_all?(a, b, Geo.Point)
def contains?(%Geo.Point{}, _), do: false
Expand All @@ -25,6 +25,10 @@ defmodule Topo.Contains do
def contains?(%Geo.MultiPoint{} = a, %Geo.MultiPoint{} = b), do: contains_all?(a, b, Geo.Point)
def contains?(%Geo.MultiPoint{}, _), do: false

def contains?(%Geo.GeometryCollection{geometries: geometries}, b) do
Enum.any?(geometries, &contains?(&1, b))
end

def contains?(%Geo.LineString{} = a, %Geo.Point{} = b) do
cond do
List.first(a.coordinates) == List.last(a.coordinates) ->
Expand Down