feat: services (#2)

src/services/ClusterService.cpp

@@ -0,0 +1,42 @@
+#include "services/ClusterService.h"
+#include "ApiServer.h"
+
+ClusterService::ClusterService(NodeContext& ctx) : ctx(ctx) {}
+
+void ClusterService::registerEndpoints(ApiServer& api) {
+    api.addEndpoint("/api/cluster/members", HTTP_GET,
+        [this](AsyncWebServerRequest* request) { handleMembersRequest(request); },
+        std::vector<ParamSpec>{});
+}
+
+void ClusterService::handleMembersRequest(AsyncWebServerRequest* request) {
+    JsonDocument doc;
+    JsonArray arr = doc["members"].to<JsonArray>();
+    
+    for (const auto& pair : *ctx.memberList) {
+        const NodeInfo& node = pair.second;
+        JsonObject obj = arr.add<JsonObject>();
+        obj["hostname"] = node.hostname;
+        obj["ip"] = node.ip.toString();
+        obj["lastSeen"] = node.lastSeen;
+        obj["latency"] = node.latency;
+        obj["status"] = statusToStr(node.status);
+        obj["resources"]["freeHeap"] = node.resources.freeHeap;
+        obj["resources"]["chipId"] = node.resources.chipId;
+        obj["resources"]["sdkVersion"] = node.resources.sdkVersion;
+        obj["resources"]["cpuFreqMHz"] = node.resources.cpuFreqMHz;
+        obj["resources"]["flashChipSize"] = node.resources.flashChipSize;
+
+        // Add labels if present
+        if (!node.labels.empty()) {
+            JsonObject labelsObj = obj["labels"].to<JsonObject>();
+            for (const auto& kv : node.labels) {
+                labelsObj[kv.first.c_str()] = kv.second;
+            }
+        }
+    }
+
+    String json;
+    serializeJson(doc, json);
+    request->send(200, "application/json", json);
+}