From bf740a069532d511370d3cc6274e10b50f586c1c Mon Sep 17 00:00:00 2001
From: Paul Bienkowski <pb@opatut.de>
Date: Tue, 5 Apr 2022 17:51:39 +0200
Subject: [PATCH] wip:Road.has_cars

---
 .../ddde1cdc767b_add_road_column_has_cars.py  | 24 +++++++++++++++++++
 roads_import.lua                              | 11 ++++++++-
 2 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 api/migrations/versions/ddde1cdc767b_add_road_column_has_cars.py

diff --git a/api/migrations/versions/ddde1cdc767b_add_road_column_has_cars.py b/api/migrations/versions/ddde1cdc767b_add_road_column_has_cars.py
new file mode 100644
index 0000000..fb6234a
--- /dev/null
+++ b/api/migrations/versions/ddde1cdc767b_add_road_column_has_cars.py
@@ -0,0 +1,24 @@
+"""add road column has_cars
+
+Revision ID: ddde1cdc767b
+Revises: a049e5eb24dd
+Create Date: 2022-04-03 20:13:22.874195
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "ddde1cdc767b"
+down_revision = "a049e5eb24dd"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column("road", sa.Column("has_cars", sa.Boolean))
+
+
+def downgrade():
+    op.drop_column("road", "has_cars")
diff --git a/roads_import.lua b/roads_import.lua
index 1744525..3770212 100644
--- a/roads_import.lua
+++ b/roads_import.lua
@@ -35,6 +35,11 @@ local HIGHWAY_TYPES = {
   "track",
   "road",
 }
+local UNMOTORIZED_TRAFFIC_HIGHWAY_TYPES = {
+  "cycleway",
+  "footway",
+  "path",
+}
 local ZONE_TYPES = {
   "urban",
   "rural",
@@ -68,6 +73,7 @@ local roads = osm2pgsql.define_way_table('road', {
   { column = 'name', type = 'text' },
   { column = 'geometry', type = 'linestring' },
   { column = 'oneway', type = 'bool' },
+  { column = 'has_cars', type = 'bool' },
 })
 
 local regions = osm2pgsql.define_relation_table('region', {
@@ -83,7 +89,9 @@ function osm2pgsql.process_way(object)
 
   -- only import certain highway ways, i.e. roads and pathways
   if not tags.highway then return end
-  if not contains(HIGHWAY_TYPES, tags.highway) then return end
+
+  local unmotorized_traffic = contains(UNMOTORIZED_TRAFFIC_HIGHWAY_TYPES, tags.highway)
+  if not contains(HIGHWAY_TYPES, tags.highway) and not unmotorized_traffic then return end
 
   -- do not import areas (plazas etc.)
   if tags.area == "yes" then return end
@@ -139,6 +147,7 @@ function osm2pgsql.process_way(object)
     zone = zone,
     directionality = directionality,
     oneway = oneway,
+    has_cars = not unmotorized_traffic
   })
 end