MateriaBrasil - API

Installation

Install Dependencies

1. Install PostgreSQL

PostgreSQL

2. Install Rbenv

Rbenv: repo

• Check that the rbenv PATH is configured correctly, according to the repo instructions.

3. Install Rbenv-gemset

Rbenv-gemset: repo

4. Install ruby 2.5.1

$ rbenv install 2.5.1

If rbenv complains you don't have that ruby version, upgrade ruby-build.

Setup the project

Clone the repository

$ git clone git@github.com:MateriaBrasil/materiabrasil-api.git
$ cd materiabrasil-api

Install local bundler

Make sure you're running the correct ruby version. Run:

rbenv versions

It should return something like:

system
...(other ruby versions installed)...
* 2.5.1 (set by /home/<path-to-repo-folder>/materiabrasil-api/.ruby-version)

Make sure you're using the correct gemset. Run:

rbenv gemset active

It should return:

.gems global

If both are ok, run:

$ gem install bundler

Verify that the bundler was installed inside materiabrasil-api/.gems folder.

Use local bundler to install the other gems

Always use this command to ensure the gems are installed in .gems.

$ bin/bundle

Set the env vars

$ cp .env.sample .env

Ask a colleague for the values.

Prepare the database

$ bin/rails db:create db:migrate db:seed

TOPSIS Calculations

Every Material has 4 percentage indicators showing the "score" for each driver (Humano Social, Gestão e Governança, Processo, Matéria Prima).

Those drivers are responsible for the percentage score on the Graph showed on the Material page. The algorithm we use to calculate those drivers are called TOPSIS.

Currently we have all those calculations separated inside Service Objects localted at app/services/topsis.

The correct used service to calculate a final percentage for some current Questionnaire is Topsis::CalculateDriverPercentage.execute(driver, supplier_or_material). Driver is the field driver of Questionnaire, and the second argument receive either Supplier (for Humano Social & Gestão e Governança calculations) and a Material (for Processo & Matéria Prima calculations).

The other service objects are supplementary and act as helpers for the main Service. Today we don't run the TOPSIS manually, it runs when you finish answering all the questions from some Questionnaire OR when admin manually trigger the calculations FOR THE ENTIRE PLATFORM.

Services

• Topsis::NormalizeBaseForQuestionnaires
  • Return the normalized value that each question will have for some questionnaire
• Topsis::CalculateAnswerWeight
  • Each answer will have it's own weight and will vary based on the type_of_company
• Topsis::MinMaxDistances / Topsis::MinMaxScenarios
  • TOPSIS work with min & max values/weights. This service calculate how far you're from each ideal and worst scenarios for the answered question
• Topsis::CalculateDriverPercentage
  • Will calculate the final percentage for the Supplier/Material and the Questionnaire you passed as argument

Jobs

• CalculateTopsisJob
  • Will calculate the TOPSIS for 1 questionnaire only
• CalculateAllTopsisJob
  • Admin can trigger this to re-calculate the ENTIRE database values

Running the project, specs & more

Running the server

$ bin/rails s

You can check that it worked by browsing localhost:3000/materials. You should see a json file.

Using Mailcatcher

After starting the server, you can access on the following URL (works with Docker):

$ localhost:8080

For Docker, use this

Tests

$ bin/rspec

The coverage will be available on the coverage/ folder. Open coverage/index.html on your browser to see details.

Running the linter

$ bin/rubocop

Deployment

Staging

$ git remote add https://git.heroku.com/materiabrasil-api.git staging
$ git push staging master

Production

To be added