dimension_assessment_attempt.sql

with user_answers as (
    select 
        qa.uuid as questions_answers_id, 
        CASE
            when st.grade::int = 1 then TRUE
            else FALSE
        END as grade,
        CASE 
            when st.state = 'checked' then TRUE
            else FALSE
        END as state
    from questions_answers qa, jsonb_to_recordset(qa.state) as st(grade float, state text)
), correct_text as (
    select 
        qa.uuid as questions_answers_id,
        TRUE as correct_answer
    from questions_answers qa
    join questions q on q.id = qa.question_id and q.type = 'TX'
), correct_choice as (
    select 
        qa.uuid as questions_answers_id,
	CASE
	    when ua.state = TRUE then TRUE
	    else FALSE
	END as correct_answer
    from questions_answers qa
    left join user_answers ua on ua.questions_answers_id = qa.uuid and ua.state = TRUE and ua.grade = TRUE
    join questions q on q.id = qa.question_id and q.type = 'CH'
), correct_multianswer as (
    select 
        qa.uuid as questions_answers_id,
        CASE
            when sum(ua.grade::int) = sum(ua.state::int) then TRUE
            else FALSE
        END as correct_answer
    from questions_answers qa
    left join user_answers ua on ua.questions_answers_id = qa.uuid and ua.state = TRUE
	join questions q on q.id = qa.question_id and q.type = 'MA'
	group by qa.id
), correct_answers as (
    select questions_answers_id, correct_answer
    from correct_text ct
    UNION
    select questions_answers_id, correct_answer
    from correct_choice cc
    UNION
    select questions_answers_id, correct_answer
    from correct_multianswer cm
)
SELECT
  ats.id as id,
  ats.assessment_id as assessment_id,
  ats.status as status,
  ats.started_at as start,
  ats.completed_at as stop,
  array_length(ats.answers, 1) as total_questions,
  sum(ca.correct_answer::int) as total_correct_answers
FROM attempts ats
join correct_answers ca on ca.questions_answers_id = ANY(ats.answers)
where ats.completed_at is not NULL
GROUP BY id, assessment_id, status, start, stop