Initial commit.

internal/api/v1/handlers_config.go

@@ -0,0 +1,76 @@
+package v1
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+// ConfigUpdate represents a single configuration update
+type ConfigUpdate struct {
+	Path  string      `json:"path"`
+	Value interface{} `json:"value"`
+}
+
+// ConfigUpdateBatchRequest represents a batch configuration update request
+type ConfigUpdateBatchRequest struct {
+	Updates []ConfigUpdate `json:"updates"`
+}
+
+// ConfigUpdateBatch updates multiple configuration values atomically
+func (api *API) ConfigUpdateBatch(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	name := vars["name"]
+
+	// Validate instance exists
+	if err := api.instance.ValidateInstance(name); err != nil {
+		respondError(w, http.StatusNotFound, fmt.Sprintf("Instance not found: %v", err))
+		return
+	}
+
+	// Parse request body
+	var req ConfigUpdateBatchRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		respondError(w, http.StatusBadRequest, "Invalid request body")
+		return
+	}
+
+	if len(req.Updates) == 0 {
+		respondError(w, http.StatusBadRequest, "updates array is required and cannot be empty")
+		return
+	}
+
+	// Get config path
+	configPath := api.instance.GetInstanceConfigPath(name)
+
+	// Validate all paths before applying changes
+	for i, update := range req.Updates {
+		if update.Path == "" {
+			respondError(w, http.StatusBadRequest, fmt.Sprintf("update[%d]: path is required", i))
+			return
+		}
+	}
+
+	// Apply all updates atomically
+	// The config manager's SetConfigValue already uses file locking,
+	// so each individual update is atomic. For true atomicity across
+	// all updates, we would need to implement transaction support.
+	// For now, we apply updates sequentially within the lock.
+	updateCount := 0
+	for _, update := range req.Updates {
+		valueStr := fmt.Sprintf("%v", update.Value)
+		if err := api.config.SetConfigValue(configPath, update.Path, valueStr); err != nil {
+			respondError(w, http.StatusInternalServerError,
+				fmt.Sprintf("Failed to update config path %s: %v", update.Path, err))
+			return
+		}
+		updateCount++
+	}
+
+	respondJSON(w, http.StatusOK, map[string]interface{}{
+		"message": "Configuration updated successfully",
+		"updated": updateCount,
+	})
+}