Philanthropy Data Commons Service

This is the data-handling service layer for the Philanthropy Data Commons (PDC).

The PDC is an access-controlled environment in which changemakers and funders can share funding proposals, both for improved efficiency (e.g., offering a "common grant application" in specific domains) and for opening up new possibilities in partnering and alliance-building. The PDC is designed to enable cross-organizational data sharing while allowing organizations to maintain their own systems, practices, and data standards.

To do this, the PDC maintains a mapping between various organizations' data fields and the PDC's internal data representation. For example, if one organization uses Proposal Name and another uses Title of Proposal, both of those might map to the PDC field ProposalTitle. The PDC remembers this mapping, translating back and forth as needed so that data flow in and out seamlessly, a unified search interface can be offered, etc.

With the above overview in mind, we can now summarize what this service layer does:

• Store opportunities (analogous to RFPs / CFPs) and the fields (which hold applicants' responses) associated with those opportunities.
• Store proposals -- the actual responses to opportunities, with long-term consistency provided via the above-described mapping.
• Authenticate users and provide access control, so that a given organization's data is only shared with whom that organization has authorized.
• Provide a programmatic interface (an API) by which authorized users (both changemakers and funders) can browse, search, and, where appropriate, update opportunities and proposals, subject to the access controls defined by data owners.
• Track the provenance and update history of all information, noticing and handling discrepancies. For example, if two different GMS tools connect to the PDC and provide conflicting information about an application or an applicant, the PDC may be able to pick the right answer automatically (based on a up-to-date date or on some other precedence rule), or it may flag the conflict and require a human to resolve it. See more on Changemaker data.

Of all these features, the API is probably the most important, because it is the heart of the PDC's interoperability. It enables GMSs and other systems to connect to the PDC to give and receive information about opportunities and proposals. For example, it can enable a second funder to discover a proposal that a changemaker had proposed to some other potential funder originally; it even provides ways for the originally considered funder to deliberately share (assuming the changemaker authorizes) a good proposal with a specific funder that might be more appropriate for it.

While the PDC service layer will have its own web-browser-based searching and browsing interface, the API (and its associated data schema) are where interoperability lives, and our top priority is documenting that API and helping people to use it. Through the API, other systems, including but not limited to GMS tools, can connect to the PDC and use PDC data to supplement what they provide.

See also the technical architecture diagram.

Hosting

For notes on how to set up a production instance, see the hosting documentation.

Development

In order to run this software you need to set up a Postgres 14 database.

Setup

1. Install npm dependencies

npm ci

2. Set up environment variables

See the .env.example file for relevant environment variables. One option to manage environment variables is to use a .env file and source it prior to running a command. For example:

cp .env.example .env
edit .env
set -a
source .env

3. Run migrations

npm run migrate

Common Commands

To build the project:

npm run build

To run tests:

npm run test

To run the linter:

npm run lint

To remove dev dependencies for a docker or production build:

npm prune --omit=dev

To build a docker image:

docker build .

To run migrations:

npm run build
npm run migrate

To start the server:

npm run build
npm start

To start the server in a development environment:

npm run start

Logging

To override the default log level in any environment, set the environment variable LOG_LEVEL with any of the above npm commands:

LOG_LEVEL=trace npm run test

Alternatively, one may set LOG_LEVEL in the .env file.

Authentication and Authorization

A valid Bearer JSON Web Token (Bearer JWT) is required in requests to the PDC service. The PDC officially recommends using KeyCloak as the authentication provider, but supports any valid Bearer JWT provider. Please refer to the relevant documentation for setup and configuration

See .env.example for documentation on the necessary environment variables for Keycloak (or chosen authentication provider)

An example with a Keycloak authentication and Swagger-UI

We use Swagger to generate an interactive api interface as the default route for the service. From the Keycloak admin interface, e.g. https://my-host/admin:

1. Add a realm e.g. "pdc" (avoid spaces in the name).
2. Within the realm just added in step (1) add a client e.g. "pdc-openapi-docs", with Client authentication off and Authorization off:
   • Standard flow Checked,
   • Direct access grants unchecked,
   • Implicit flow unchecked,
   • Service accounts roles unchecked,
   • OAuth 2.0 Device Authorization Grant (optional), and
   • OIDC CIBA Grant unchecked.
3. In the settings for the client added in step (2), set the root URL and Home URL to the URL of the PDC service (not the auth service). For development purposes, all callback routes can be authorized
   • /*
4. In the settings for the client added in step (2), add a Web origins of +.
5. Within the realm, add a user, e.g. test-user. Set a password for this user.
6. Set your environment variables (see .env.example)
7. Run the service repository with npm run start.
8. Go to swagger ui page at http://localhost:3001/
9. Click "Authorize" in the top left and click the "Authorize" button in the popup
10. Proceed through keycloak login
11. Once logged in and redirected to swagger ui, query any of the endpoints to test authentication

Authorization

The application looks for Keycloak group membership to drive authorization within the application. The names are hard-coded into the application therefore specific group names added to Keycloak are required.

To add a pdc-admin group to the PDC realm in Keycloak, visit the Keycloak admin interface, select the PDC Realm, and click Groups. Click "Create Group" and name it pdc-admin.

To add a user to the pdc-admin group, visit the Keycloak admin interface, select the PDC Realm, and click Users, click the User, click the Groups tab, and click "Join Group". Alternatively, click Groups in the PDC Realm, click the "Members" tab, and click "Add member."

To have a visible role in the JWT of a user, a role must be associated with the user or one of the user's groups. Create a pdc-admin role in the PDC realm in the Keycloak admin interface. Select the PDC Realm, click Realm roles, and click "Create role." Go back to the pdc-admin Group, click the "Role mapping" tab, click "Assign role", and finally bind the pdc-admin role to the pdc-admin group.

When users are logged in, their JWTs will include a list of associated roles. The application can first validate the JWT (same as authentication) and then check the validated JWT for role presence.

Members of the pdc-admin group should additionally be able to manage users in the Keycloak PDC realm admin interface. The limited ability to manage users in the PDC realm is distinct from being an administrator of the entire Keycloak instance. Administrators of the entire Keycloak instance are admins in the master realm. In contrast, users in the PDC realm can have PDC user management privileges without being members of the master realm at all. To grant members of the pdc-admin group the ability to edit users and groups in the Keycloak PDC realm, visit the Keycloak (master) admin interface, select the PDC Realm, and click Groups. Click the pdc-admin group, click the "Role Mapping" tab, click "Assign role", click the drop-down menu and select "Filter by clients", select the following realm-management roles: view-users, query-users, and manage-users. For new logins following this change, members of the pdc-admin group can visit the Keycloak PDC realm admin interface, log in with their PDC realm credentials, and gain access to a limited subset of Keycloak functionality, namely the ability to edit users and groups.

Understanding the Project

Project Structure

• /src/databases contains database migrations, queries, and the core db access object.
• /src/handlers contains all business logic related to the invocation of a given PDC api call.
• /src/routers contains the piping that maps a given API route to a controller.

Database

We are using a very lightweight library called tinypg for our database interactions and a similarly lightweight library called postgres-migrations to handle migrations.

Migrations should be named according to the following pattern: ####-{action}-{table}

For example: 0001-create-users or 0001-modify-users

In /src/databases/seeds there is seed or starter data. The contents can be run manually to help developers get data in their databases. The scripts are not referenced by the software and are included for convenience. The migrations must run prior to using seed scripts.

Node version

We aim to use the "Active LTS" version of node. An exact version of node is specified in automated workflows and Dockerfile while a major version is specified in the .node-version. You should be able to use any minor version within the Active LTS version and might be able to use other major versions.

EditorConfig

We use EditorConfig to help developers maintain proper whitespace habits in the project. Most IDEs have an official EditorConfig plugin you can install.

Ignored revisions

We have set up a file to track commits that are focused on formatting changes. It is possible to ignore these commits when running git blame.

You can configure your local git to always ignore these commits by invoking:

git config blame.ignoreRevsFile .git-blame-ignore-revs