feat: add /api/settings/get, /api/settings/set to modify config in frontend

handler/settings.go

@@ -0,0 +1,86 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"nukumizu-backend/config"
+	"nukumizu-backend/postLog"
+	"nukumizu-backend/utils"
+)
+
+// SettingsGetHandler handles GET /api/settings/get?type=xxx.
+// type selects which config file to return and may be one of
+// "global", "bot_user_config" or "bot_node_config"; the returned "config"
+// object has the same layout as the source JSON file.
+func SettingsGetHandler(w http.ResponseWriter, r *http.Request) {
+	if !utils.Auth(w, r, "GET", "admin") {
+		return
+	}
+
+	settingsType := r.URL.Query().Get("type")
+	if settingsType == "" {
+		utils.SendErrorResponse(w, http.StatusBadRequest, "missing type parameter")
+		return
+	}
+	if !config.IsValidSettingsType(settingsType) {
+		utils.SendErrorResponse(w, http.StatusBadRequest, "invalid type parameter: "+settingsType)
+		return
+	}
+
+	data, err := config.GetSettings(settingsType)
+	if err != nil {
+		utils.SendErrorResponse(w, http.StatusInternalServerError, "failed to get settings: "+err.Error())
+		return
+	}
+
+	utils.SendSuccessResponse(w, "", map[string]interface{}{
+		"config": json.RawMessage(data),
+	})
+}
+
+// SettingsSetHandler handles POST /api/settings/set?type=xxx.
+// type selects which config file to update and may be one of "global",
+// "bot_user_config" or "bot_node_config". The JSON body is a partial config
+// object whose keys map directly to config entries, e.g.
+//
+//	{"system": {"debugMode": true}}
+//
+// Multiple entries may be given at once; only the provided keys are changed.
+func SettingsSetHandler(w http.ResponseWriter, r *http.Request) {
+	if !utils.Auth(w, r, "POST", "admin") {
+		return
+	}
+
+	settingsType := r.URL.Query().Get("type")
+	if settingsType == "" {
+		utils.SendErrorResponse(w, http.StatusBadRequest, "missing type parameter")
+		return
+	}
+	if !config.IsValidSettingsType(settingsType) {
+		utils.SendErrorResponse(w, http.StatusBadRequest, "invalid type parameter: "+settingsType)
+		return
+	}
+
+	dec := json.NewDecoder(r.Body)
+	dec.UseNumber() // Keep numeric values verbatim (e.g. QQ IDs) instead of float64.
+	var patch map[string]interface{}
+	if err := dec.Decode(&patch); err != nil {
+		utils.SendErrorResponse(w, http.StatusBadRequest, "invalid request body: expected a JSON object")
+		return
+	}
+	if patch == nil {
+		utils.SendErrorResponse(w, http.StatusBadRequest, "request body must be a JSON object")
+		return
+	}
+
+	if err := config.UpdateSettings(settingsType, patch); err != nil {
+		postLog.Error("Failed to update " + settingsType + " settings: " + err.Error())
+		utils.SendErrorResponse(w, http.StatusInternalServerError, "failed to update settings: "+err.Error())
+		return
+	}
+
+	utils.SendSuccessResponse(w, "settings updated successfully", map[string]interface{}{
+		"type": settingsType,
+	})
+}