Multilinguality (#279)

Improve multilinguality: names in 57 languages, name:latin, name:nonlatin, name_int. Fixes #211 #252 #80.

See #279 for more info.

layers/poi/layer.sql

@@ -3,10 +3,11 @@
 -- etldoc:     label="layer_poi | <z14_> z14+" ] ;
 
 CREATE OR REPLACE FUNCTION layer_poi(bbox geometry, zoom_level integer, pixel_width numeric)
-RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, name_de text, class text, subclass text, "rank" int) AS $$
+RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, name_de text, tags hstore, class text, subclass text, "rank" int) AS $$
     SELECT osm_id, geometry, NULLIF(name, '') AS name,
     COALESCE(NULLIF(name_en, ''), name) AS name_en,
     COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
+    tags,
     poi_class(subclass, mapping_key) AS class, subclass,
         row_number() OVER (
             PARTITION BY LabelGrid(geometry, 100 * pixel_width)

layers/poi/mapping.yaml

@@ -315,6 +315,8 @@ tables:
     - name: name_de
       key: name:de
       type: string
+    - name: tags
+      type: hstore_tags
     - name: subclass
       type: mapping_value
     - name: mapping_key
@@ -354,6 +356,8 @@ tables:
     - name: name_de
       key: name:de
       type: string
+    - name: tags
+      type: hstore_tags
     - name: subclass
       type: mapping_value
     - name: mapping_key

layers/poi/name.sql

@@ -0,0 +1,5 @@
+DO $$
+BEGIN
+  update osm_poi_point SET tags = slice_language_tags(tags) || get_basic_names(tags, geometry);
+  update osm_poi_polygon SET tags = slice_language_tags(tags) || get_basic_names(tags, geometry);
+END $$;

layers/poi/poi.yaml

@@ -34,9 +34,10 @@ layer:
   datasource:
     geometry_field: geometry
     srid: 900913
-    query: (SELECT geometry, name, name_en, name_de, class, subclass, rank FROM layer_poi(!bbox!, z(!scale_denominator!), !pixel_width!)) AS t
+    query: (SELECT geometry, name, name_en, name_de, {name_languages}, class, subclass, rank FROM layer_poi(!bbox!, z(!scale_denominator!), !pixel_width!)) AS t
 schema:
   - ./poi_update.sql
+  - ./name.sql
   - ./poi_polygon_update.sql
   - ./class.sql
   - ./layer.sql