Getting Started

maproulette3 is a new front-end for MapRoulette built with React.

A back-end server from the maproulette2 project is still required. You can either install and configure it locally, or -- if looking to do front-end development only -- can connect to a pre-existing server if you have access to one (you will need your API key for that server). Please do not use the production server for development purposes.

Developing Locally

Basic Dependencies:

• Node 12 LTS
• yarn
• jq
• curl

Initial Setup

1. Create a .env.development.local file and then look through .env at the available configuration options and override any desired settings in your new .env.development.local

2. yarn to fetch and install NPM modules

3. yarn run start to fire up the front-end development server

As mentioned above, a back-end server from the maproulette2 project is also required. You can either install and configure it locally or, if you have access to a pre-existing server, connect directly to it by using your API key for that server.

Developing with a local back-end server

1. Install the back-end server using the instructions from the maproulette2 project, if you haven't already

2. Visit your OpenStreetMap account and go to My Settings -> oauth settings -> Register your application and setup a new application for development. For the Main Application URL and Callback URL settings, put in http://127.0.0.1:9000 (assuming your back-end server is running on the default port 9000). The only app permission needed is to "read their user preferences". Take note of your new app's consumer key and secret key, as you'll need them in the next step

3. In your back-end server project, setup a .conf file that overrides properties as needed from conf/application.conf (unless you'd prefer to set explicit system properties on the command line when starting up the server). Refer to the conf/application.conf file, conf/dev.conf file and maproulette2 docs for explanations of the various server configuration settings. At the very least, you'll want to make sure your JDBC url is correct and your OAuth consumer key and secret are set properly.

4. Fire up your back-end server, specifying the path to your .conf file with -Dconfig.resource or explicitly specifying the various system properties on the command line. See the maproulette2 docs for details on starting up the server

5. Edit your .env.development.local file in your front-end project and set:

   REACT_APP_SERVER_OAUTH_URL='http://127.0.0.1:9000/auth/authenticate?redirect=http://127.0.0.1:3000'
   

   (assuming your back-end server is on port 9000 and front-end is on port 3000). Restart or startup your front-end server, and then navigate to the front-end at http://127.0.0.1:3000

Developing with a pre-existing back-end server

These instructions are for connecting to an existing back-end server, rather than a local one you have installed. Please do not use the production MapRoulette server for development use

1. Open MapRoulette on that server normally in your browser, visit your user profile, and take note of your API key at the bottom of the page. Alternatively, you can use the server's super.key if it has been setup with one and you have access to it

2. Edit your .env.development.local file and override the following config variables:

REACT_APP_MAP_ROULETTE_SERVER_URL='https://yourserver.com'
REACT_APP_SERVER_API_KEY='your-api-key-for-that-server'

3. Restart your front-end dev server if it's already running (ctrl-c then yarn run start again)

4. Point your browser directly at the front-end server, http://127.0.0.1:3000 by default. Once the page finishes loading, you should show up as signed-in if all is working correctly

Updating to the Latest Code

Note that the maproulette2 back-end server must be updated separately.

1. Stop your front-end server (ctrl-c) if it's running.
2. Pull the latest code
3. yarn to install new or updated NPM packages
4. yarn run start to restart the front-end server.

Staging/Production build:

1. Setup a .env.production file with the desired production setting overrides.

• set REACT_APP_URL='https://myserver.com' (substituting your domain, of course)
• set REACT_APP_MAP_ROULETTE_SERVER_URL='https://myserver.com'
• if you wish to use Matomo/PIWIK for analytics, set REACT_APP_MATOMO_URL and REACT_APP_MATOMO_SITE_ID to your tracking url and site id, respectively (see .env file for example).
• set feature flags to enabled or disabled as desired.
• override any other settings from the .env file as needed or desired.

2. yarn to install and update NPM packages.

3. yarn run build to create a minified front-end build in the build/ directory.

Adding Additional and Custom Map Layers

Default map layers are determined by pulling in data from the OSM Editor Layer Index at build time and extracting layers marked as default layers with global coverage. These are stored in the src/defaultLayers.json file. Modifying this file is not recommended as it will be overwritten automatically by the build process.

Layer ids of additional desired layers from the Layer Index can be specified in the REACT_APP_ADDITIONAL_INDEX_LAYERS .env config variable (see the .env file for documentation), and these will also be included in the defaultLayers.json file. The default .env file includes the OpenCycleMap layer this way.

Custom and 3rd-party layers that aren't included in the Layer Index can be manually added to src/customLayers.json following the same structure as the default layers. The build process does not modify this file other than creating a stub if it doesn't exist.

Setting API Keys for Map Layers

API keys for any layers -- default or custom -- can be set through the REACT_APP_MAP_LAYER_API_KEYS .env file configuration variable (see the .env file for documentation). For custom layers, an API key can also simply be included in the specified layer url in src/customLayers.json if that is simpler.

Enabling the Mapillary Map Layer

MapRoulette has built-in support for a Mapillary map layer during task completion, allowing the mapper to make of use of available street-level imagery. To enable the layer, simply set the REACT_APP_MAPILLARY_API_KEY .env key to your Mapillary client id and restart your dev server (or rebuild your dev front-end for staging/production). If you don't have a client id, you can set one up through the Mapillary Developer Tools

Development Notes

The project was bootstrapped with Create React App.

Branch management follows GitFlow with active development occurring on the develop branch. Pull requests should target the develop branch. The main branch always contains the latest release, and the prerelease branch contains features and fixes promoted from develop that are candidates for the next release to main.

Release versions follow Semantic Versioning.

Unit Tests

Unit tests are built with Jest + Enzyme.

yarn test to run them in watch mode.

CSS Styling and Naming

We are currently in transition between the old styling that used the Bulma framework with SASS and new styling using Tailwind CSS with PostCSS. New CSS classes are prefixed with mr- to distinguish them from any existing Bulma classes, but during this transition there are still situations where a mix of both Tailwind and Bulma are in play.

Tailwind configuration is controlled with the src/tailwind.config.js file. New CSS classes can be found in src/styles/

Internationalization, Localization, and Translation

Internationalization and localization is performed via react-intl. Most components feature co-located Messages.js files that contain messages intended for display, along with default (U.S. English) versions of each message.

A fresh en-US.json file can be built from the latest messages using yarn run build-intl, which is also run automatically as part of the yarn build script used for creating production builds.

Translations for other locales are managed through transifex, who kindly provides us with free service through their Open Source program. Translation files are pulled into the code repository from time to time and stored in the src/lang/ directory.

Adding support for additional locales is quick and straight-forward: edit src/services/User/Locale/Locale.js and follow the directions at the top of the file.

By default, the en-US locale will be used for users who have not set a locale in their MapRoulette user settings. This default locale can be changed with the REACT_APP_DEFAULT_LOCALE .env setting. Users who have set a locale will always have their locale honored regardless of the default locale.

Note that MapRoulette makes use of its own locale setting and does not use the setting from the user's OpenStreetMap account at this time.