KnowledgeGraph MCP Server

import { StorageProvider, MigrationService } from './types.js'; /** * Service for migrating data between different storage providers */ export class DataMigrationService implements MigrationService { /** * Migrate data between two storage providers */ async migrateFromStorage(project: string, sourceStorage: StorageProvider, targetStorage: StorageProvider): Promise<void> { try { console.log(`Migrating project ${project} from ${sourceStorage.constructor.name} to ${targetStorage.constructor.name}`); // Load data from source const graph = await sourceStorage.loadGraph(project); // Validate data if (!graph || (!graph.entities && !graph.relations)) { console.warn(`No data found for project ${project} in source storage`); return; } // Save data to target await targetStorage.saveGraph(graph, project); console.log(`Successfully migrated project ${project}: ${graph.entities?.length || 0} entities, ${graph.relations?.length || 0} relations`); } catch (error) { throw new Error(`Failed to migrate project ${project}: ${error}`); } } /** * Validate that migration was successful by comparing data */ async validateMigration(project: string, sourceStorage: StorageProvider, targetStorage: StorageProvider): Promise<boolean> { try { const sourceGraph = await sourceStorage.loadGraph(project); const targetGraph = await targetStorage.loadGraph(project); // Compare entities if (sourceGraph.entities.length !== targetGraph.entities.length) { console.error(`Entity count mismatch: source=${sourceGraph.entities.length}, target=${targetGraph.entities.length}`); return false; } // Compare relations if (sourceGraph.relations.length !== targetGraph.relations.length) { console.error(`Relation count mismatch: source=${sourceGraph.relations.length}, target=${targetGraph.relations.length}`); return false; } // More detailed validation could be added here // For now, we just check counts return true; } catch (error) { console.error(`Migration validation failed: ${error}`); return false; } } /** * Backup data from a storage provider to a backup location */ async backupData(project: string, sourceStorage: StorageProvider, backupStorage: StorageProvider): Promise<void> { try { const graph = await sourceStorage.loadGraph(project); const backupProject = `${project}_backup_${Date.now()}`; await backupStorage.saveGraph(graph, backupProject); console.log(`Backup created for project ${project} as ${backupProject}`); } catch (error) { throw new Error(`Failed to backup project ${project}: ${error}`); } } /** * Restore data from a backup */ async restoreData(backupProject: string, targetProject: string, backupStorage: StorageProvider, targetStorage: StorageProvider): Promise<void> { try { const graph = await backupStorage.loadGraph(backupProject); await targetStorage.saveGraph(graph, targetProject); console.log(`Restored project ${targetProject} from backup ${backupProject}`); } catch (error) { throw new Error(`Failed to restore project ${targetProject} from backup ${backupProject}: ${error}`); } } /** * List all projects in a storage provider */ async listProjects(_storage: StorageProvider): Promise<string[]> { // This would need to be implemented based on the storage provider // For now, return empty array as this requires storage-specific implementation console.warn('listProjects not implemented for this storage provider'); return []; } /** * Get statistics about a project in a storage provider */ async getProjectStats(project: string, storage: StorageProvider): Promise<{ entities: number; relations: number; size?: number }> { try { const graph = await storage.loadGraph(project); return { entities: graph.entities.length, relations: graph.relations.length, // Size calculation would be storage-specific }; } catch (error) { throw new Error(`Failed to get stats for project ${project}: ${error}`); } } }