# carbonintensity-api
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A simple Rust library to help retrieve data from the [Carbon Intensity API](https://api.carbonintensity.org.uk/), not all functionalities of the CarbonIntensity API might be exposed.

Please read the API's [terms of use](https://github.com/carbon-intensity/terms).

## CLI

An executable is provided to try the library. With Rust and Cargo installed

```
cargo install --locked --path .
```

then

`carbonintensity-api -h`

should display the list of available commands and options.

```
Provides a client for the UK National Grid Carbon Intensity API

Usage: carbonintensity-api [OPTIONS] <VALUE>

Arguments:
  <VALUE>  numerical value for a region (1-17) or first part of a UK postcode

Options:
  -s, --start-date <START_DATE>  
  -e, --end-date <END_DATE>
  -h, --help                     Print help
  -V, --version                  Print version
```

To display the current carbon intensity for a given postcode

`carbonintensity-api bs7`

To do the same for a region 

`carbonintensity-api 11`

The region id is a number between 1 and 17

 1. North Scotland
 2. South Scotland
 3. North West England
 4. North East England
 5. South Yorkshire
 6. North Wales, Merseyside and Cheshire
 7. South Wales
 8. West Midlands
 9. East Midlands
 10. East England
 11. South West England
 12. South England
 13. London
 14. South East England
 15. England
 16. Scotland
 17. Wales


Specifying dates will return a list of intensities for a region or postcode. If no end date is provided, the current day and time will be used.

The dates are expected to be at the `%Y-%m-%dT%H:%MZ` format or simply `%Y-%m-%d`, for instance 

`carbonintensity-api -s 2023-11-11 -e 2023-11-11T12:00Z postcode bs7`

Intensities are returned by 30 mins windows.

## Library

You can use the library in your Rust project by adding it to cargo with 

`cargo add carbonintensity-api`

then declaring it in your code 

```Rust
use carbonintensity::{get_intensity, Target, Region};

...

  let scotland = Region::Scotland;
  let result = get_intensity(&Target::Region(scotland)).await;

```

## License

This project is provided under [Apache License](http://www.apache.org/licenses/LICENSE-2.0).