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Development setup

Architecture

The Tasking Manager is composed of two parts:

  • Frontend: A user interface built using React.
  • Backend: A database and API built using Python.

The two parts can be developed independently of each other.

Frontend

The client is the front-end user interface of the Tasking Manager. It is based on the React framework and you can find all files in the frontend directory.

If you don't want to setup a backend server, you can work on frontend development using our staging server API. Execute export TM_APP_API_URL='https://tasking-manager-staging-api.hotosm.org' before running the yarn start command. Be aware that the staging API can be offline while we are deploying newer versions to the staging server and that you'll not have access to some management views due to permissions. Check the configuration section to learn more about how to configure Tasking Manager.

Dependencies

The following dependencies must be available globally on your system:

  • Download and install NodeJS LTS v12+ and yarn
  • Go into the frontend directory and execute yarn.

Available Scripts

In the project directory, you can run:

yarn start

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

yarn test

Launches the test runner in the interactive watch mode.
See the section about running tests for more information.

yarn build

Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.

The build is minified and the filenames include the hashes.
Your app is ready to be deployed!

See the section about deployment for more information.

Learn More

You can learn more in the Create React App documentation.

To learn React, check out the React documentation.

Backend

The backend is made up of a postgres database and an associated API that calls various end points to create tasks, manage task state, and produce analytics.

Dependencies

You can check the Dockerfile to have a reference of how to install it in a Debian/Ubuntu system.

Configuration

There are two ways to configure Tasking Manager. You can set some environment variables on your shell or you can define the configuration in the tasking-manager.env file on the repository root directory. To use that last option, follow the below instructions:

  • Copy the example configuration file to start your own configuration: cp example.env tasking-manager.env.
  • Adjust the tasking-manager.env configuration file to fit your configuration.
  • Make sure that the following variables are set correctly in the tasking-manager.env configuration file:
    • TM_APP_BASE_URL=web-server-endpoint
    • POSTGRES_DB=tasking-manager-database-name
    • POSTGRES_USER=database-user-name
    • POSTGRES_PASSWORD=database-user-password
    • POSTGRES_ENDPOINT=database-endpoint-can-be-localhost
    • POSTGRES_PORT=database-port
    • TM_SECRET=define-freely-any-number-and-letter-combination
    • TM_CONSUMER_KEY=oauth-consumer-key-from-openstreetmap
    • TM_CONSUMER_SECRET=oauth-consumer-secret-key-from-openstreetmap

Build

  • Create a Python Virtual Environment, using Python 3.6+:
    • python3 -m venv ./venv
  • Activate your virtual environment and install dependencies:
    • Linux/Mac:
      • . ./venv/bin/activate
      • pip install -r requirements.txt

Tests

The project includes a suite of Unit and Integration tests that you should run after any changes

python3 -m unittest discover tests/backend

Export translatable strings to en.json source file

cd frontend && yarn build-locales

Database

Create a fresh database

We use Flask-Migrate to create the database from the migrations directory. Check the instructions on how to setup a PostGIS database with docker or on your local system. Then you can execute the following command to apply the migrations:

python3 manage.py db upgrade

Migrating your data from TM2

You can use this script to migrate your data from the prior tasking manager version (v2) to the current one. Please see this documentation page for important information about this process.

Set permissions to create projects

To be able to create projects and have full permissions as an admin user inside TM, login to the TM with your OSM account to populate your user information in the database, then execute the following command on your terminal (with the OS user that is the owner of the database):

psql -d <your_database> -c "UPDATE users set role = 1 where username = '<your_osm_username>'"

API

If you plan to only work on the API you only have to build the backend architecture. Install the backend dependencies, and run the server:

python3 manage.py runserver -d -r

You can access the API documentation on http://localhost:5000/api-docs, it also allows you to execute requests on your local TM instance. The API docs is also available on our production and staging instances.

API Authentication

In order to authenticate on the API, you need to have an Authorization Token.

  1. Run the command line manage.py with the gen_token option and -u <OSM_User_ID_number>. The command line can be run in any shell session as long as you are in the tasking-manager directory.
venv/bin/python manage.py gen_token -u 99999999

This will generate a line that looks like this:

Your base64 encoded session token: b'SWpFaS5EaEoxRlEubHRVC1DSTVJZ2hfalMc0xlalu3KRk5BUGk0'

  1. In the Swagger UI, where it says

Token sessionTokenHere==

replace sessionTokenHere== with the string of characters between the apostrophes (' ') above so you end up with something that looks like this in that field:

Token SWpFaS5EaEoxRlEubHRVC1DSTVJZ2hfalMc0xlalu3KRk5BUGk0

Your user must have logged in to the local testing instance once of course and have the needed permissions for the API call.

You can get your OSM user id number either by finding it in your local testing/dev database select * from users or from OSM by viewing the edit history of your user, selecting a changeset from the list, and then at the bottom link Changeset XML and it will be in the uid field of the XML returned.

API Authentication on remote instance

To get your token on the production or staging Tasking Manager instances, sign in in the browser and then either:

  • go to the user profile page, enable Expert mode in the settings, and copy the token from the API Key section.
  • inspect a network request and search for the Authorization field in the request headers section.

DevOps

Docker

Creating a local PostGIS database with Docker

If you're not able to connect to an existing tasking-manager DB, we have a Dockerfile that will allow you to run PostGIS locally as follows.

Dependencies

Following must be available locally:

Build & Run the PostGIS dockerfile

  1. From the root of the project:

docker build -t tasking-manager-db ./scripts/docker/postgis

  1. The image should be downloaded and build locally. Once complete you should see it listed, with

docker images

  1. You can now run the image (this will run PostGIS in a docker container, with port 5432 mapped to localhost):

docker run -d -p 5432:5432 tasking-manager-db

  1. Confirm the image is running successfully:

docker ps

  1. Finally you can set your env variable to point at your containerised DB:

export TM_DB=postgresql://hottm:hottm@localhost/tasking-manager

  1. Refer to the rest of the instructions in the README to setup the DB and run the app

Non-Docker

Creating the PostGIS database

It may be the case you would like to set up the database without using Docker for one reason or another. This provides you with a set of commands to create the database and export the database address to allow you to dive into backend development.

Dependencies

First, ensure that Postgresql and PostGIS are installed and running on your computer.

Create the database user and database

Assuming you have sudo access and the unix Postgresql owner is postgres:

$ sudo -u postgres psql
$ CREATE USER "hottm" PASSWORD 'hottm';
$ CREATE DATABASE "tasking-manager" OWNER "hottm";
$ \c "tasking-manager";
$ CREATE EXTENSION postgis;

Finally, add the environmental variable to access the database:

export TM_DB=postgresql://hottm:hottm@localhost/tasking-manager

It is possible to install and run the Tasking Manager using Docker and Docker Compose.

Clone the Tasking Manager repository and use docker-compose up to get a working version of the API running.