Added set/get instance config endpoints; fixed declarative config bug

daemon.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"net/http"
 	"os"
 	"os/signal"
@@ -48,6 +49,8 @@ func StartDaemon(cfg *AppConfig, configPath string) error {
 	mux.HandleFunc("/instances/logs", ds.handleGetLogs)
 	mux.HandleFunc("/instances/delete", ds.handleDelete)
 	mux.HandleFunc("/instances/modify", ds.handleModify)
+	mux.HandleFunc("/instances/getConfig", ds.handleGetConfig)
+	mux.HandleFunc("/instances/setConfig", ds.handleSetConfig)
 
 	corsWrappedHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Access-Control-Allow-Origin", "*")
@@ -549,3 +552,86 @@ func (ds *DaemonServer) handleModify(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprintf(w, "Successfully modified instance %s", name)
 
 }
+
+func (ds *DaemonServer) handleGetConfig(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	name := r.URL.Query().Get("name")
+	if name == "" {
+		http.Error(w, "Missing name parameter", http.StatusBadRequest)
+		return
+	}
+
+	exists := func() bool {
+		ds.RLock()
+		defer ds.RUnlock()
+		_, ok := ds.cfg.Instances[name]
+		return ok
+	}()
+	if !exists {
+		http.Error(w, fmt.Sprintf("Cannot modify instance config for: '%s'; Does not exist.", name), http.StatusBadRequest)
+		return
+	}
+
+	confPath := filepath.Join(ds.cfg.Storage.InstancesDir, name, "serverconfig.json")
+	data, err := os.ReadFile(confPath)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("Failed to get instance config: %v", err), http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(data)
+}
+
+func (ds *DaemonServer) handleSetConfig(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	name := r.URL.Query().Get("name")
+	if name == "" {
+		http.Error(w, "Missing name parameter", http.StatusBadRequest)
+		return
+	}
+
+	exists := func() bool {
+		ds.RLock()
+		defer ds.RUnlock()
+		_, ok := ds.cfg.Instances[name]
+		return ok
+	}()
+	if !exists {
+		http.Error(w, fmt.Sprintf("Cannot modify instance config for: '%s'; Does not exist.", name), http.StatusBadRequest)
+		return
+	}
+
+	running := func() bool {
+		ds.procManager.RLock()
+		defer ds.procManager.RUnlock()
+		_, ok := ds.procManager.ActiveInstances[name]
+		return ok
+	}()
+	if running {
+		http.Error(w, fmt.Sprintf("Cannot modify instance config for: '%s'; It is currently running.", name), http.StatusBadRequest)
+		return
+	}
+
+	data, err := io.ReadAll(r.Body)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("Failed to set instance config: %v", err), http.StatusInternalServerError)
+		return
+	}
+
+	confPath := filepath.Join(ds.cfg.Storage.InstancesDir, name, "serverconfig.json")
+	if err = os.WriteFile(confPath, data, 0644); err != nil {
+		http.Error(w, fmt.Sprintf("Failed to get instance config: %v", err), http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+}

instance_config.go

@@ -62,8 +62,16 @@ func SyncInstanceConfig(templateVersion string, instanceConfigPath string, meta
 	}
 
 	for key, value := range meta.Config {
+		if sub, ok := value.(map[string]interface{}); ok {
+			if existing, ok := rawConfig[key].(map[string]interface{}); ok {
+				for k, v := range sub {
+					existing[k] = v
+				}
+			}
+		} else {
 			rawConfig[key] = value
 		}
+	}
 
 	rawConfig["ServerName"] = meta.ServerName
 	rawConfig["Port"] = meta.Port