| .base_url | Return base url of Airly API v2 |
| .get_apikey | Get Airly apikey |
| .send_request | Sends a request to the specified url and retrieves it's content. |
| add_json_extension | Adds the json extension to the given url |
| add_path | Adds the given path to the given url |
| assert | Asserts a given expression and throws an error if it returns FALSE |
| assert_apikey | Checks whether apikey is correctly set |
| assert_coordinates | Checks whether apikey is correctly set |
| assert_ids | Checks whether ids are correctly defined. If not throws an error |
| build_current_df | Creates an object representing Airly measurement |
| build_forecast_df | Creates object containing information about history data for given API response |
| build_history_df | Creates object containing information about history data for given API response |
| create_airly_api_response | Creates an object representing a response from the Airly API. Also every API call return information about current limits What is used to assign variables in pkg.env |
| create_airly_location | Creates an object representing Airly location |
| create_airly_measurement | Creates an object representing Airly measurement |
| create_airly_meta | Creates a data.frame representing Airly meta |
| create_request_url | Creates a request url based on the given base url and passed paths. The json extensions is added automatically. |
| get_content | Retrieves the response content |
| get_indexes | Get Airly available indexes |
| get_installation_by_id | Get Airly installation by id |
| get_installation_measurements | Get Airly measurements for any geographical location given installation id |
| get_measurements_info | Get measures used in Airly |
| get_nearest_installations | Get Airly nearest installations to given point |
| get_nearest_measurements | Get Airly nearest measurements to given point |
| get_point_measurements | Get Airly measurements for any geographical location |
| is_airly_api_response | Checks whether the given object is of the class airly_api_response |
| is_airly_location | Checks whether the given object is of the class airly_location |
| is_airly_measurement | Checks whether the given object is of the class airly_measurement |
| parse_json | Parses a json response |
| print.airly_measurement | Print for "airly_measurement" type objects |
| remaining_requests | Get information about remaining API requests |
| replace_null | Replaces NULL with NA for nested lists. Useful when NULL value leads to error while object casting |
| set_apikey | Set Airly apikey |
| validate_airly_api_response | Checks if the given response is not empty and that it did not return an error http code. |
| validate_airly_location | Checks whether the given object is correctly defined airly_location class |
| validate_airly_measurement | Checks whether the given object is correctly defined airly_measurement class |
| validate_airly_meta | Checks whether the given object is correctly correctly defined |