feat: add mvp language server (#8515)

Resolves #8400

1 files changed, 49 insertions, 0 deletions

diff --git a/cli/lsp/config.rs b/cli/lsp/config.rs
new file mode 100644
index 000000000..ebc145708
--- /dev/null
+++ b/cli/lsp/config.rs
@@ -0,0 +1,49 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+use deno_core::error::AnyError;
+use deno_core::serde::Deserialize;
+use deno_core::serde_json;
+use deno_core::serde_json::Value;
+
+#[derive(Debug, Clone, Default)]
+pub struct ClientCapabilities {
+  pub status_notification: bool,
+}
+
+#[derive(Debug, Clone, Default, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct WorkspaceSettings {
+  pub enable: bool,
+  pub config: Option<String>,
+  pub import_map: Option<String>,
+  pub lint: bool,
+  pub unstable: bool,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct Config {
+  pub client_capabilities: ClientCapabilities,
+  pub settings: WorkspaceSettings,
+}
+
+impl Config {
+  pub fn update(&mut self, value: Value) -> Result<(), AnyError> {
+    let settings: WorkspaceSettings = serde_json::from_value(value)?;
+    self.settings = settings;
+    Ok(())
+  }
+
+  #[allow(clippy::redundant_closure_call)]
+  pub fn update_capabilities(
+    &mut self,
+    capabilities: &lsp_types::ClientCapabilities,
+  ) {
+    if let Some(experimental) = &capabilities.experimental {
+      let get_bool =
+        |k: &str| experimental.get(k).and_then(|it| it.as_bool()) == Some(true);
+
+      self.client_capabilities.status_notification =
+        get_bool("statusNotification");
+    }
+  }
+}