1 files changed, 197 insertions, 0 deletions
diff --git a/crates/client/src/atuin_client/api_client.rs b/crates/client/src/atuin_client/api_client.rs
new file mode 100644
index 00000000..bd5bf59e
--- /dev/null
+++ b/crates/client/src/atuin_client/api_client.rs
@@ -0,0 +1,197 @@
+use std::env;
+use std::time::Duration;
+
+use eyre::{Result, bail, eyre};
+use reqwest::{Response, StatusCode, Url, header::HeaderMap};
+use tracing::debug;
+use uuid::Uuid;
+
+use crate::atuin_common::{api::ErrorResponse, record::RecordStatus};
+use crate::atuin_common::{
+    api::{ATUIN_CARGO_VERSION, ATUIN_HEADER_VERSION, ATUIN_VERSION},
+    record::{EncryptedData, HostId, Record, RecordIdx},
+    tls::ensure_crypto_provider,
+};
+
+use semver::Version;
+
+static APP_USER_AGENT: &str = concat!("atuin/", env!("CARGO_PKG_VERSION"),);
+
+pub(crate) struct Client<'a> {
+    sync_addr: &'a str,
+    user_id: Uuid,
+    inner: reqwest::Client,
+}
+
+fn make_url(address: &str, path: &str, user_id: Uuid) -> Result<String> {
+    let address = address.strip_suffix('/').unwrap_or(address);
+
+    // `join()` expects a trailing `/` in order to join paths
+    // e.g. it treats `http://host:port/subdir` as a file called `subdir`
+    let address = &format!("{address}/api/v0/{user_id}/");
+
+    // passing a path with a leading `/` will cause `join()` to replace the entire URL path
+    let path = path.strip_prefix("/").unwrap_or(path);
+
+    let url = Url::parse(address)
+        .map(|url| url.join(path))?
+        .map_err(|_| eyre!("invalid address"))?;
+
+    Ok(url.to_string())
+}
+
+pub(crate) fn ensure_version(response: &Response) -> Result<bool> {
+    let version = response.headers().get(ATUIN_HEADER_VERSION);
+
+    let version = if let Some(version) = version {
+        match version.to_str() {
+            Ok(v) => Version::parse(v),
+            Err(e) => bail!("failed to parse server version: {:?}", e),
+        }
+    } else {
+        bail!("Server not reporting its version: it is either too old or unhealthy");
+    }?;
+
+    // If the client is newer than the server
+    if version.major < ATUIN_VERSION.major {
+        println!(
+            "Atuin version mismatch! In order to successfully sync, the server needs to run a newer version of Atuin"
+        );
+        println!("Client: {ATUIN_CARGO_VERSION}");
+        println!("Server: {version}");
+
+        return Ok(false);
+    }
+
+    Ok(true)
+}
+
+async fn handle_resp_error(resp: Response) -> Result<Response> {
+    let status = resp.status();
+    let url = resp.url().to_string();
+
+    if status == StatusCode::SERVICE_UNAVAILABLE {
+        bail!(
+            "Service unavailable: check https://status.atuin.sh (or get in touch with your host)"
+        );
+    }
+
+    if status == StatusCode::TOO_MANY_REQUESTS {
+        bail!("Rate limited; please wait before doing that again");
+    }
+
+    if !status.is_success() {
+        if let Ok(error) = resp.json::<ErrorResponse<'_>>().await {
+            let reason = error.reason;
+
+            if status.is_client_error() {
+                bail!("Invalid request to the service at {url}, {status} - {reason}.")
+            }
+
+            bail!(
+                "There was an error with the atuin sync service at {url}, server error {status}: {reason}.\nIf the problem persists, contact the host"
+            )
+        }
+
+        bail!(
+            "There was an error with the atuin sync service at {url}, Status {status:?}.\nIf the problem persists, contact the host"
+        )
+    }
+
+    Ok(resp)
+}
+
+impl<'a> Client<'a> {
+    pub(crate) fn new(
+        sync_addr: &'a str,
+        connect_timeout: u64,
+        timeout: u64,
+        user_id: Uuid,
+    ) -> Result<Self> {
+        ensure_crypto_provider();
+        let mut headers = HeaderMap::new();
+
+        // used for semver server check
+        headers.insert(ATUIN_HEADER_VERSION, ATUIN_CARGO_VERSION.parse()?);
+
+        Ok(Client {
+            user_id,
+            sync_addr,
+            inner: reqwest::Client::builder()
+                .user_agent(APP_USER_AGENT)
+                .default_headers(headers)
+                .connect_timeout(Duration::new(connect_timeout, 0))
+                .timeout(Duration::new(timeout, 0))
+                .build()?,
+        })
+    }
+
+    pub(crate) async fn delete_store(&self) -> Result<()> {
+        let url = make_url(self.sync_addr, "/store", self.user_id)?;
+        let url = Url::parse(url.as_str())?;
+
+        let resp = self.inner.delete(url).send().await?;
+
+        handle_resp_error(resp).await?;
+
+        Ok(())
+    }
+
+    pub(crate) async fn post_records(&self, records: &[Record<EncryptedData>]) -> Result<()> {
+        let url = make_url(self.sync_addr, "/record", self.user_id)?;
+        let url = Url::parse(url.as_str())?;
+
+        debug!("uploading {} records to {url}", records.len());
+
+        let resp = self.inner.post(url).json(records).send().await?;
+        handle_resp_error(resp).await?;
+
+        Ok(())
+    }
+
+    pub(crate) async fn next_records(
+        &self,
+        host: HostId,
+        tag: String,
+        start: RecordIdx,
+        count: u64,
+    ) -> Result<Vec<Record<EncryptedData>>> {
+        debug!("fetching record/s from host {}/{}/{}", host.0, tag, start);
+
+        let url = make_url(
+            self.sync_addr,
+            &format!(
+                "/record/next?host={}&tag={}&count={}&start={}",
+                host.0, tag, count, start
+            ),
+            self.user_id,
+        )?;
+
+        let url = Url::parse(url.as_str())?;
+
+        let resp = self.inner.get(url).send().await?;
+        let resp = handle_resp_error(resp).await?;
+
+        let records = resp.json::<Vec<Record<EncryptedData>>>().await?;
+
+        Ok(records)
+    }
+
+    pub(crate) async fn record_status(&self) -> Result<RecordStatus> {
+        let url = make_url(self.sync_addr, "/record", self.user_id)?;
+        let url = Url::parse(url.as_str())?;
+
+        let resp = self.inner.get(url).send().await?;
+        let resp = handle_resp_error(resp).await?;
+
+        if !ensure_version(&resp)? {
+            bail!("could not sync records due to version mismatch");
+        }
+
+        let index = resp.json().await?;
+
+        debug!("got remote index {index:?}");
+
+        Ok(index)
+    }
+}