create a new course staff report (#2011)

* create a new course staff report

* nitpick from copilot

Author: rachellougee

src/ol_dbt/models/reporting/_reporting__models.yml

@@ -1132,3 +1132,41 @@ models:
   tests:
   - dbt_expectations.expect_compound_columns_to_be_unique:
       column_list: ["user_email", "chapter_title", "courserun_readable_id", "platform"]
+
+- name: course_staff_report
+  description: Report of course staff members (instructors, staff, etc.) across all
+    platforms and their last course activity date
+  columns:
+  - name: platform
+    description: string, name of the platform (e.g. MITx Online, xPro, edX.org, Residential
+      MITx)
+    tests:
+    - not_null
+  - name: user_username
+    description: string, username of the course staff member on the platform
+    tests:
+    - not_null
+  - name: user_email
+    description: string, email address of the course staff member
+  - name: courserun_readable_id
+    description: string, unique identifier for the course run formatted as course-v1:{org}+{course
+      code}+{run_tag}
+    tests:
+    - not_null
+  - name: courserun_start_on
+    description: timestamp, date and time when the course run starts. May be null.
+  - name: courserun_end_on
+    description: timestamp, date and time when the course run ends. May be null.
+  - name: courserun_is_current
+    description: boolean, indicating if the course run is currently running. True
+      if courserun_start_on is in the past and blank courserun_end_on, or courserun_start_on
+      is in the past and courserun_end_on is in the future.
+  - name: course_roles
+    description: string, comma-separated list of privilege levels assigned to the
+      user for working in this course run (e.g. instructor, staff, beta_testers)
+  - name: last_course_activity_date
+    description: date, the most recent date the staff member had any course activity
+      in this course run. May be null if the staff member has no recorded course activity.
+  tests:
+  - dbt_expectations.expect_compound_columns_to_be_unique:
+      column_list: ["platform", "user_username", "courserun_readable_id"]

src/ol_dbt/models/reporting/course_staff_report.sql

@@ -0,0 +1,43 @@
+with combined_course_roles as (
+    select
+        platform
+        , user_username
+        , user_email
+        , courserun_readable_id
+        ,  {{ array_join('array_agg(courseaccess_role order by courseaccess_role)', ", ") }} as course_roles
+    from {{ ref('int__combined__user_course_roles') }}
+    group by platform, user_username, user_email, courserun_readable_id
+)
+
+, combined_course_runs as (
+    select * from {{ ref('int__combined__course_runs') }}
+)
+
+, course_activities as (
+    select
+        platform
+        , user_username
+        , courserun_readable_id
+        , max(courseactivity_date) as last_course_activity_date
+    from {{ ref('marts__combined_course_engagements') }}
+    group by platform, user_username, courserun_readable_id
+)
+
+select
+    combined_course_roles.platform
+    , combined_course_roles.user_username
+    , combined_course_roles.user_email
+    , combined_course_roles.courserun_readable_id
+    , combined_course_runs.courserun_start_on
+    , combined_course_runs.courserun_end_on
+    , combined_course_runs.courserun_is_current
+    , combined_course_roles.course_roles
+    , course_activities.last_course_activity_date
+from combined_course_roles
+left join combined_course_runs
+    on combined_course_runs.platform = combined_course_roles.platform
+    and combined_course_runs.courserun_readable_id = combined_course_roles.courserun_readable_id
+left join course_activities
+    on course_activities.platform = combined_course_roles.platform
+    and course_activities.user_username = combined_course_roles.user_username
+    and course_activities.courserun_readable_id = combined_course_roles.courserun_readable_id