refactor(agent): move agent pool to agent package, rename route.Agent() to route.GetAgent()

internal/config/agents.go

@@ -0,0 +1,37 @@
+package config
+
+import (
+	"slices"
+
+	"github.com/yusing/go-proxy/agent/pkg/agent"
+	"github.com/yusing/go-proxy/internal/gperr"
+	"github.com/yusing/go-proxy/internal/route/provider"
+)
+
+func (cfg *Config) VerifyNewAgent(host string, ca agent.PEMPair, client agent.PEMPair) (int, gperr.Error) {
+	if slices.ContainsFunc(cfg.value.Providers.Agents, func(a *agent.AgentConfig) bool {
+		return a.Addr == host
+	}) {
+		return 0, gperr.New("agent already exists")
+	}
+
+	var agentCfg agent.AgentConfig
+	agentCfg.Addr = host
+	err := agentCfg.StartWithCerts(cfg.Task().Context(), ca.Cert, client.Cert, client.Key)
+	if err != nil {
+		return 0, gperr.Wrap(err, "failed to start agent")
+	}
+	agent.AddAgent(&agentCfg)
+
+	provider := provider.NewAgentProvider(&agentCfg)
+	if err := cfg.errIfExists(provider); err != nil {
+		agent.RemoveAgent(&agentCfg)
+		return 0, err
+	}
+	err = provider.LoadRoutes()
+	if err != nil {
+		agent.RemoveAgent(&agentCfg)
+		return 0, gperr.Wrap(err, "failed to load routes")
+	}
+	return provider.NumRoutes(), nil
+}