Refactor: optional contexts (#89)

* Fix dbt_project.yml

* Cross-compat filter in web timing

dbt_project.yml

@@ -28,9 +28,4 @@ vars:
 models:
   snowplow:
     base:
-      materialized: ephemeral
-      optional:
-        enabled: false
-    page_views:
-      optional:
-        enabled: false
+      +materialized: ephemeral

models/base/optional/snowplow_base_performance_timing_context.sql

@@ -1,2 +1,5 @@
+{{ config(
+    enabled=(var('snowplow:context:performance_timing') and is_adapter('default'))
+) }}
 
 select * from {{ var('snowplow:context:performance_timing') }}

models/base/optional/snowplow_base_useragent_context.sql

@@ -1,2 +1,5 @@
+{{ config(
+    enabled=(var('snowplow:context:useragent') and is_adapter('default'))
+) }}
 
 select * from {{ var('snowplow:context:useragent') }}

models/page_views/optional/snowplow_web_timing_context.sql

@@ -3,7 +3,8 @@
     config(
         materialized='table',
         sort='page_view_id',
-        dist='page_view_id'
+        dist='page_view_id',
+        enabled=(var('snowplow:context:performance_timing') and is_adapter('default'))
     ) 
 }}
 
@@ -74,9 +75,13 @@ prep as (
       and pt.load_event_end is not null -- zero is acceptable
 
       -- remove rare outliers (Unix timestamp is more than twice what it should be)
-      and datediff(d, pt.root_tstamp, (timestamp 'epoch' + pt.response_end/1000 * interval '1 second ')) < 365
-      and datediff(d, pt.root_tstamp, (timestamp 'epoch' + pt.unload_event_start/1000 * interval '1 second ')) < 365
-      and datediff(d, pt.root_tstamp, (timestamp 'epoch' + pt.unload_event_end/1000 * interval '1 second ')) < 365
+
+      {% set ts_columns = ['pt.response_end', 'pt.unload_event_start', 'pt.unload_event_end'] %}
+      {% for ts_column in ts_columns %}
+
+      and {{ dbt_utils.datediff(dbt_utils.dateadd('millisecond', ts_column, "'1970-01-01'"), 'pt.root_tstamp', 'day') }} < 365
+
+      {% endfor %}
 
 ),
 

models/page_views/optional/snowplow_web_ua_parser_context.sql

@@ -2,7 +2,8 @@
     config(
         materialized='table',
         sort='page_view_id',
-        dist='page_view_id'
+        dist='page_view_id',
+        enabled=(var('snowplow:context:useragent') and is_adapter('default'))
     )
 }}