onspring-api-sdk-rust 0.0.1

use std::time::Duration;

use bytes::Bytes;
use reqwest::header::{HeaderMap, HeaderValue};
use reqwest::{Method, StatusCode};
use serde::de::DeserializeOwned;
use serde::Serialize;

use crate::error::{OnspringError, Result};

/// Client for interacting with the Onspring API v2.
pub struct OnspringClient {
  http_client: reqwest::Client,
  base_url: String,
  api_key: String,
}

/// Builder for constructing an [`OnspringClient`].
pub struct OnspringClientBuilder {
  base_url: String,
  api_key: String,
  http_client: Option<reqwest::Client>,
  timeout: Option<Duration>,
}

impl OnspringClientBuilder {
  /// Creates a new builder with the given API key.
  pub fn new(api_key: impl Into<String>) -> Self {
    Self {
      base_url: "https://api.onspring.com".to_string(),
      api_key: api_key.into(),
      http_client: None,
      timeout: None,
    }
  }

  /// Sets the base URL for the API.
  pub fn base_url(mut self, url: impl Into<String>) -> Self {
    self.base_url = url.into();
    self
  }

  /// Sets a custom `reqwest::Client` to use for HTTP requests.
  pub fn http_client(mut self, client: reqwest::Client) -> Self {
    self.http_client = Some(client);
    self
  }

  /// Sets the request timeout.
  pub fn timeout(mut self, timeout: Duration) -> Self {
    self.timeout = Some(timeout);
    self
  }

  /// Builds the [`OnspringClient`].
  pub fn build(self) -> OnspringClient {
    let http_client = self.http_client.unwrap_or_else(|| {
      reqwest::Client::builder()
        .timeout(self.timeout.unwrap_or(Duration::from_secs(120)))
        .build()
        .expect("failed to build HTTP client")
    });

    OnspringClient {
      http_client,
      base_url: self.base_url.trim_end_matches('/').to_string(),
      api_key: self.api_key,
    }
  }
}

impl OnspringClient {
  /// Creates a new [`OnspringClientBuilder`].
  pub fn builder(api_key: impl Into<String>) -> OnspringClientBuilder {
    OnspringClientBuilder::new(api_key)
  }

  fn default_headers(&self) -> HeaderMap {
    let mut headers = HeaderMap::new();
    headers.insert(
      "x-apikey",
      HeaderValue::from_str(&self.api_key).expect("invalid API key"),
    );
    headers.insert("x-api-version", HeaderValue::from_static("2"));
    headers
  }

  pub(crate) async fn request<T: DeserializeOwned>(
    &self,
    method: Method,
    path: &str,
    query: &[(&str, String)],
    body: Option<&impl Serialize>,
  ) -> Result<T> {
    let url = format!("{}{}", self.base_url, path);
    let mut req = self
      .http_client
      .request(method, &url)
      .headers(self.default_headers())
      .query(query);

    if let Some(body) = body {
      req = req.json(body);
    }

    let response = req.send().await?;
    let status = response.status();

    if !status.is_success() {
      let message = response
        .json::<serde_json::Value>()
        .await
        .ok()
        .and_then(|v| v.get("message")?.as_str().map(String::from))
        .unwrap_or_default();
      return Err(OnspringError::Api {
        status_code: status.as_u16(),
        message,
      });
    }

    let body = response.text().await?;
    serde_json::from_str(&body).map_err(OnspringError::Serialization)
  }

  pub(crate) async fn request_no_content(
    &self,
    method: Method,
    path: &str,
    query: &[(&str, String)],
    body: Option<&impl Serialize>,
  ) -> Result<()> {
    let url = format!("{}{}", self.base_url, path);
    let mut req = self
      .http_client
      .request(method, &url)
      .headers(self.default_headers())
      .query(query);

    if let Some(body) = body {
      req = req.json(body);
    }

    let response = req.send().await?;
    let status = response.status();

    if !status.is_success() {
      let message = response
        .json::<serde_json::Value>()
        .await
        .ok()
        .and_then(|v| v.get("message")?.as_str().map(String::from))
        .unwrap_or_default();
      return Err(OnspringError::Api {
        status_code: status.as_u16(),
        message,
      });
    }

    Ok(())
  }

  pub(crate) async fn request_bytes(
    &self,
    method: Method,
    path: &str,
    query: &[(&str, String)],
  ) -> Result<(StatusCode, HeaderMap, Bytes)> {
    let url = format!("{}{}", self.base_url, path);
    let response = self
      .http_client
      .request(method, &url)
      .headers(self.default_headers())
      .query(query)
      .send()
      .await?;

    let status = response.status();

    if !status.is_success() {
      let message = response
        .json::<serde_json::Value>()
        .await
        .ok()
        .and_then(|v| v.get("message")?.as_str().map(String::from))
        .unwrap_or_default();
      return Err(OnspringError::Api {
        status_code: status.as_u16(),
        message,
      });
    }

    let headers = response.headers().clone();
    let bytes = response.bytes().await?;
    Ok((status, headers, bytes))
  }

  pub(crate) async fn request_multipart<T: DeserializeOwned>(
    &self,
    path: &str,
    form: reqwest::multipart::Form,
  ) -> Result<T> {
    let url = format!("{}{}", self.base_url, path);
    let response = self
      .http_client
      .post(&url)
      .headers(self.default_headers())
      .multipart(form)
      .send()
      .await?;

    let status = response.status();

    if !status.is_success() {
      let message = response
        .json::<serde_json::Value>()
        .await
        .ok()
        .and_then(|v| v.get("message")?.as_str().map(String::from))
        .unwrap_or_default();
      return Err(OnspringError::Api {
        status_code: status.as_u16(),
        message,
      });
    }

    let body = response.text().await?;
    serde_json::from_str(&body).map_err(OnspringError::Serialization)
  }
}