implement econet exporter

pkg/econet/econet.go

@@ -0,0 +1,94 @@
+// Package econet provides EconetService, a service.AppService that connects
+// to the Rheem EcoNet cloud and exposes device state via gRPC, an MCP tool,
+// and OTEL metrics served for Prometheus scraping.
+package econet
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+
+	rheemcloud "github.com/kevinburke/rheemcloud-go"
+
+	optsgrpc "gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/grpc/opts"
+	optshttp "gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/http/opts"
+
+	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/config"
+	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetgrpc"
+	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetmcp"
+	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetmetrics"
+	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/service"
+)
+
+type EconetService struct {
+	ctx     context.Context
+	config  *config.ServiceConfig
+	client  *rheemcloud.Client
+	grpc    *econetgrpc.EconetGRPCServer
+	mcp     *econetmcp.EconetMCPServer
+	metrics *econetmetrics.Collector
+}
+
+func (e *EconetService) Init(ctx context.Context, cfg *config.ServiceConfig) (service.ShutdownFunc, error) {
+	e.ctx = ctx
+	e.config = cfg
+
+	client, err := connect(ctx, cfg)
+	if err != nil {
+		return nil, err
+	}
+	e.client = client
+
+	e.grpc = econetgrpc.NewEconetGRPCServer(ctx, cfg, client)
+	e.mcp = econetmcp.NewEconetMCPServer(ctx, cfg, e.grpc)
+	e.metrics = econetmetrics.NewCollector(ctx, cfg, client)
+	if err := e.metrics.Start(); err != nil {
+		return nil, err
+	}
+
+	return e.shutdown, nil
+}
+
+func connect(ctx context.Context, cfg *config.ServiceConfig) (*rheemcloud.Client, error) {
+	if cfg.EconetEmail == "" || cfg.EconetPassword == "" {
+		return nil, fmt.Errorf("econet: email and password required (set ECONET_EMAIL / ECONET_PASSWORD)")
+	}
+	client, err := rheemcloud.Connect(ctx, cfg.EconetEmail, cfg.EconetPassword, &rheemcloud.Config{
+		Logger: slog.Default(),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("econet: connect failed: %w", err)
+	}
+	return client, nil
+}
+
+func (e *EconetService) shutdown(_ context.Context) (string, error) {
+	e.metrics.Stop()
+	return "EconetService", e.client.Close()
+}
+
+func (e *EconetService) GetGRPC() *optsgrpc.AppGRPC {
+	return &optsgrpc.AppGRPC{
+		Services:     e.grpc.GetServices(),
+		GRPCDialOpts: e.grpc.GetDialOpts(),
+	}
+}
+
+func (e *EconetService) GetHTTP() *optshttp.AppHTTP {
+	return &optshttp.AppHTTP{
+		Ctx:          e.ctx,
+		Handlers:     e.mcp.GetHandlers(),
+		HealthChecks: e.healthChecks(),
+	}
+}
+
+func (e *EconetService) healthChecks() []optshttp.HealthCheckFunc {
+	return []optshttp.HealthCheckFunc{
+		func(_ context.Context) error {
+			if len(e.client.Devices()) == 0 {
+				return fmt.Errorf("econet: no devices loaded")
+			}
+			return nil
+		},
+	}
+}