How to organize data in Nunjucks working with 11ty?

Question

I'm developing a static site using 11ty with Nunjucks. It's for a company that provides training for certification exams (AWS etc.) and they have ~25 Certification Training Courses each having its own data.

I have made it work but I have a strong feeling that there's a simpler and convenient way to organize this data. The data is something like this for each course:

Title:
Subtext:
Date:
Duration:

So far, so good. The tricky part is the course syllabus. It is organized something like this:

1. Topic Title
    1.1 Subtopic Title
    1.1 Subtopic Description
    1.2 Subtopic Title
    1.2 Subtopic Description

2. Topic Title
    2.1 Subtopic Title
    2.1 Subtopic Description
    2.2 Subtopic Title
    2.2 Subtopic Description

Around 4-8 topics for each course. I am currently denoting each of these variables with their standalone names which is making this very messy.

agenda_1: 
a1_1: 
a1_1_text: 
a1_2: 
a1_2_text:

agenda_1: 
a1_1: 
a1_1_text: 
a1_2: 
a1_2_text:

Please help me organize this data better (probably by using objects here or maybe a JSON file?). I am essentially looking for a way to nest these as objects so it's more accessible at a later date. Any help would be deeply appreciated. Thanks!

Answer 1

If you are using a separate data file, or putting it in the front-matter of each course, I would prefer to organize it like this in YAML:

topics:
  - title: Topic Title 1
    subtopics:
      - title: Subtopic Title 1
        desc: Subtopic Description 1
      - title: Subtopic Title 2
        desc: Subtopic Description 2

  - title: Topic Title 2
    subtopics:
      - title: Subtopic Title 1
        desc: Subtopic Description 1
      - title: Subtopic Title 2
        desc: Subtopic Description 2