feat: extract client (#48)

This extracts the client (strategy pattern), this is so that it is will be possible to test the actual querier, without hitting / requiring the dagger-engine running.

crates/dagger-core/Cargo.toml

@@ -17,6 +17,8 @@ tokio = { workspace = true }
 tracing = { workspace = true }
 tracing-subscriber = { workspace = true }
 
+base64 = "0.21.0"
+gql_client = "1.0.7"
 dirs = "4.0.0"
 flate2 = { version = "1.0.25", features = ["zlib"] }
 graphql-introspection-query = "0.2.0"
@@ -28,3 +30,4 @@ reqwest = { version = "0.11.14", features = ["stream", "deflate"] }
 sha2 = "0.10.6"
 tar = "0.4.38"
 tempfile = "3.3.0"
+async-trait = "0.1.67"

crates/dagger-core/src/graphql_client.rs

@@ -0,0 +1,52 @@
+use std::collections::HashMap;
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use base64::engine::general_purpose;
+use base64::Engine;
+use gql_client::ClientConfig;
+
+use crate::connect_params::ConnectParams;
+
+#[async_trait]
+pub trait GraphQLClient {
+    async fn query(&self, query: &str) -> eyre::Result<Option<serde_json::Value>>;
+}
+
+pub type DynGraphQLClient = Arc<dyn GraphQLClient + Send + Sync>;
+
+#[derive(Debug)]
+pub struct DefaultGraphQLClient {
+    client: gql_client::Client,
+}
+
+impl DefaultGraphQLClient {
+    pub fn new(conn: &ConnectParams) -> Self {
+        let token = general_purpose::URL_SAFE.encode(format!("{}:", conn.session_token));
+
+        let mut headers = HashMap::new();
+        headers.insert("Authorization".to_string(), format!("Basic {}", token));
+
+        Self {
+            client: gql_client::Client::new_with_config(ClientConfig {
+                endpoint: conn.url(),
+                timeout: Some(1000),
+                headers: Some(headers),
+                proxy: None,
+            }),
+        }
+    }
+}
+
+#[async_trait]
+impl GraphQLClient for DefaultGraphQLClient {
+    async fn query(&self, query: &str) -> eyre::Result<Option<serde_json::Value>> {
+        let res: Option<serde_json::Value> = self
+            .client
+            .query(&query)
+            .await
+            .map_err(|r| eyre::anyhow!(r.to_string()))?;
+
+        return Ok(res);
+    }
+}

crates/dagger-core/src/lib.rs

@@ -7,6 +7,7 @@ pub mod config;
 pub mod connect_params;
 pub mod downloader;
 pub mod engine;
+pub mod graphql_client;
 pub mod introspection;
 pub mod logger;
 pub mod schema;