72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
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#pragma once
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// Step 90: LSP client core
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//
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// Minimal JSON-RPC LSP client with injectable transport.
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#include <string>
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#include <memory>
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#include <vector>
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#include <nlohmann/json.hpp>
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class LSPTransport {
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public:
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virtual ~LSPTransport() = default;
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virtual void send(const std::string& msg) = 0;
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virtual bool receive(std::string& out) = 0;
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virtual bool isOpen() const = 0;
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virtual void close() = 0;
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};
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class LSPClient {
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public:
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explicit LSPClient(std::shared_ptr<LSPTransport> transport)
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: transport_(std::move(transport)) {}
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void initialize(const std::string& rootUri,
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const std::string& clientName,
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int processId) {
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nlohmann::json params;
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params["processId"] = processId;
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params["rootUri"] = rootUri;
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params["clientInfo"] = { {"name", clientName}, {"version", "0.1"} };
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params["capabilities"] = nlohmann::json::object();
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sendRequest("initialize", params);
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sendNotification("initialized", nlohmann::json::object());
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}
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void shutdown() {
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sendRequest("shutdown", nlohmann::json::object());
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sendNotification("exit", nlohmann::json::object());
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if (transport_) transport_->close();
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}
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void sendNotification(const std::string& method, const nlohmann::json& params) {
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nlohmann::json msg;
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msg["jsonrpc"] = "2.0";
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msg["method"] = method;
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msg["params"] = params;
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sendMessage(msg);
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}
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int sendRequest(const std::string& method, const nlohmann::json& params) {
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nlohmann::json msg;
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msg["jsonrpc"] = "2.0";
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msg["id"] = nextId_++;
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msg["method"] = method;
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msg["params"] = params;
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sendMessage(msg);
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return msg["id"].get<int>();
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}
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private:
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void sendMessage(const nlohmann::json& msg) {
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if (!transport_) return;
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std::string body = msg.dump();
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std::string header = "Content-Length: " + std::to_string(body.size()) + "\r\n\r\n";
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transport_->send(header + body);
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}
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std::shared_ptr<LSPTransport> transport_;
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int nextId_ = 1;
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};
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