Overpass QL TS

This package aims to make creating dynamic overpassql queries easier by providing a query builder.
You wont need to worry about making small mistakes with syntax, and neither about changing existing queries.

import { DefaultOverpassApi, OverpassOutputVerbosity } from "overpass-ql-ts";

const api = DefaultOverpassApi();

const result = await api.execJson(
    (s) => [s.node.byTags({ name: /^Hospital/, amenity: "hospital" })],
    { verbosity: OverpassOutputVerbosity.Geometry }
);

const someHospital = result.elements[0];

console.log(someHospital.lat, someHospital.lon);

More quick examples here.

Instalation

npm install overpass-ql-ts

Features & "Roadmap"

This package can:

1. Build queries declaratively
2. Execute those queries
3. Execute string queries
4. Validate the results of queries
5. Query overpass api instances for status
6. Point to any overpass instance
7. Use broser fetch or XMLHttpRequest
8. Use nodejs http or https
9. Use any other http client that you adapt to this package

Core functionality is ready, small changes will be made before breaking 2.0.0.
2.0.0 will address some deprecations & pending name changes to methods and types.

1. Some OverpassApiObjectImp static methods that will be standalone functions.
2. FetchOverpassApi, HttpOverpassApi, XMLOverpassApi & DefaultOverpassApi had changed parameter structure
3. OverpassState query changed name to byTags
4. Some inner types with very unhappy names, this may or may not affect you, very likely not

Roadmap

1. Better String sanitization
2. Recurse filter, way_cnt, way_link
3. More evaluator support
4. Flow control statements
5. etc

Documentation & Examples

Checkout the Wiki for a more complete understanding of the package.

Examples are not included on npm, you may execute them in a fork/clone.
You may need to include some cli options due to the package being a module.

node --experimental-specifier-resolution=node --loader ts-node/esm ./examples/simple.ts

Development

We currently use rollup to bundle esm and commonjs versions of the code.

npm run build

The build script configures the path transform plugin and generates the .mjs, .cjs and .d.ts bundles.

npm run check

The check script runs tsc to check for errors.

Contribution

If you find a bug and wish to fix it, remember to update the tests! Fork & Pull request.

If you want to add features, do let us know, some things may not align with what we want from the package.
We would prefer to avoid production dependencies, though development dependencies are aceptable

If you would like to add just more tests to improve coverage and edge case handling, thank you!

Testing

Checkout ./test/README.md

We currently use jest with ts-jest preset, test are run on pushes or pull requests to master.
We've setup a docker image with static data, to facilitate testing.

Local testing

If you want to run tests locally, you'll need a docker engine to run the static image.

npm run overpass-container

The overpass-container script will setup the test image and start it.

If the docker engine you are using its not in your local machine, you can run the tests with

npm run test-in-container

The test-in-container script will create an image from this package,
and run it in a network with the test image that is launched from the overpass-container script.

Environment

The following are env variables used in testing, they can be configured via .env file in the project root.