feat: add operation and resource validation with intelligent suggestions

- Added OperationSimilarityService for validating operations with "Did you mean...?" suggestions
- Added ResourceSimilarityService for validating resources with plural/singular detection
- Implements Levenshtein distance algorithm for typo detection
- Pattern matching for common operation/resource mistakes
- 5-minute cache with automatic cleanup to prevent memory leaks
- Confidence scoring (30% minimum threshold) for suggestion quality
- Resource-aware operation filtering for contextual suggestions
- Safe JSON parsing with ValidationServiceError for proper error handling
- Type guards for safe property access
- Performance optimizations with early termination
- Comprehensive test coverage (37 new tests)
- Integration tested with n8n-mcp-tester agent

Example use cases:
- "listFiles" → suggests "search" for Google Drive
- "files" → suggests singular "file"
- "flie" → suggests "file" (typo correction)
- "downlod" → suggests "download"

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
czlonkowski
2025-09-24 23:57:25 +02:00
parent c23442249a
commit f6160d43a0
13 changed files with 2498 additions and 3 deletions

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@@ -5,6 +5,45 @@ All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [2.13.2] - 2025-01-24
### Added
- **Operation and Resource Validation with Intelligent Suggestions**: New similarity services for n8n node configuration validation
- `OperationSimilarityService`: Validates operations and suggests similar alternatives using Levenshtein distance and pattern matching
- `ResourceSimilarityService`: Validates resources with automatic plural/singular conversion and typo detection
- Provides "Did you mean...?" suggestions when invalid operations or resources are used
- Example: `operation: "listFiles"` suggests `"search"` for Google Drive nodes
- Example: `resource: "files"` suggests singular `"file"` with 95% confidence
- Confidence-based suggestions (minimum 30% threshold) with contextual fix messages
- Resource-aware operation filtering ensures suggestions are contextually appropriate
- 5-minute cache duration for performance optimization
- Integrated into `EnhancedConfigValidator` for seamless validation flow
- **Custom Error Handling**: New `ValidationServiceError` class for better error management
- Proper error chaining with cause tracking
- Specialized factory methods for common error scenarios
- Type-safe error propagation throughout the validation pipeline
### Enhanced
- **Code Quality and Security Improvements** (based on code review feedback):
- Safe JSON parsing with try-catch error boundaries
- Type guards for safe property access (`getOperationValue`, `getResourceValue`)
- Memory leak prevention with periodic cache cleanup
- Performance optimization with early termination for exact matches
- Replaced magic numbers with named constants for better maintainability
- Comprehensive JSDoc documentation for all public methods
- Improved confidence calculation for typos and transpositions
### Fixed
- **Test Compatibility**: Updated test expectations to correctly handle exact match scenarios
- **Cache Management**: Fixed cache cleanup to prevent unbounded memory growth
- **Validation Deduplication**: Enhanced config validator now properly replaces base validator errors with detailed suggestions
### Testing
- Added comprehensive test coverage for similarity services (37 new tests)
- All unit tests passing with proper edge case handling
- Integration confirmed via n8n-mcp-tester agent validation
## [2.13.1] - 2025-01-24
### Changed

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@@ -1,6 +1,6 @@
{
"name": "n8n-mcp",
"version": "2.13.1",
"version": "2.13.2",
"description": "Integration between n8n workflow automation and Model Context Protocol (MCP)",
"main": "dist/index.js",
"bin": {

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@@ -1,6 +1,6 @@
{
"name": "n8n-mcp-runtime",
"version": "2.13.0",
"version": "2.13.2",
"description": "n8n MCP Server Runtime Dependencies Only",
"private": true,
"dependencies": {

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@@ -0,0 +1,178 @@
/**
* Test script for operation and resource validation with Google Drive example
*/
import { DatabaseAdapter } from '../src/database/database-adapter';
import { NodeRepository } from '../src/database/node-repository';
import { EnhancedConfigValidator } from '../src/services/enhanced-config-validator';
import { WorkflowValidator } from '../src/services/workflow-validator';
import { createDatabaseAdapter } from '../src/database/database-adapter';
import { logger } from '../src/utils/logger';
import chalk from 'chalk';
async function testOperationValidation() {
console.log(chalk.blue('Testing Operation and Resource Validation'));
console.log('='.repeat(60));
// Initialize database
const dbPath = process.env.NODE_DB_PATH || 'data/nodes.db';
const db = await createDatabaseAdapter(dbPath);
const repository = new NodeRepository(db);
// Initialize similarity services
EnhancedConfigValidator.initializeSimilarityServices(repository);
// Test 1: Invalid operation "listFiles"
console.log(chalk.yellow('\n📝 Test 1: Google Drive with invalid operation "listFiles"'));
const invalidConfig = {
resource: 'fileFolder',
operation: 'listFiles'
};
const node = repository.getNode('nodes-base.googleDrive');
if (!node) {
console.error(chalk.red('Google Drive node not found in database'));
process.exit(1);
}
const result1 = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
invalidConfig,
node.properties,
'operation',
'ai-friendly'
);
console.log(`Valid: ${result1.valid ? chalk.green('✓') : chalk.red('✗')}`);
if (result1.errors.length > 0) {
console.log(chalk.red('Errors:'));
result1.errors.forEach(error => {
console.log(` - ${error.property}: ${error.message}`);
if (error.fix) {
console.log(chalk.cyan(` Fix: ${error.fix}`));
}
});
}
// Test 2: Invalid resource "files" (should be singular)
console.log(chalk.yellow('\n📝 Test 2: Google Drive with invalid resource "files"'));
const pluralResourceConfig = {
resource: 'files',
operation: 'download'
};
const result2 = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
pluralResourceConfig,
node.properties,
'operation',
'ai-friendly'
);
console.log(`Valid: ${result2.valid ? chalk.green('✓') : chalk.red('✗')}`);
if (result2.errors.length > 0) {
console.log(chalk.red('Errors:'));
result2.errors.forEach(error => {
console.log(` - ${error.property}: ${error.message}`);
if (error.fix) {
console.log(chalk.cyan(` Fix: ${error.fix}`));
}
});
}
// Test 3: Valid configuration
console.log(chalk.yellow('\n📝 Test 3: Google Drive with valid configuration'));
const validConfig = {
resource: 'file',
operation: 'download'
};
const result3 = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
validConfig,
node.properties,
'operation',
'ai-friendly'
);
console.log(`Valid: ${result3.valid ? chalk.green('✓') : chalk.red('✗')}`);
if (result3.errors.length > 0) {
console.log(chalk.red('Errors:'));
result3.errors.forEach(error => {
console.log(` - ${error.property}: ${error.message}`);
});
} else {
console.log(chalk.green('No errors - configuration is valid!'));
}
// Test 4: Test in workflow context
console.log(chalk.yellow('\n📝 Test 4: Full workflow with invalid Google Drive node'));
const workflow = {
name: 'Test Workflow',
nodes: [
{
id: '1',
name: 'Google Drive',
type: 'n8n-nodes-base.googleDrive',
position: [100, 100] as [number, number],
parameters: {
resource: 'fileFolder',
operation: 'listFiles' // Invalid operation
}
}
],
connections: {}
};
const validator = new WorkflowValidator(repository, EnhancedConfigValidator);
const workflowResult = await validator.validateWorkflow(workflow, {
validateNodes: true,
profile: 'ai-friendly'
});
console.log(`Workflow Valid: ${workflowResult.valid ? chalk.green('✓') : chalk.red('✗')}`);
if (workflowResult.errors.length > 0) {
console.log(chalk.red('Errors:'));
workflowResult.errors.forEach(error => {
console.log(` - ${error.nodeName || 'Workflow'}: ${error.message}`);
if (error.details?.fix) {
console.log(chalk.cyan(` Fix: ${error.details.fix}`));
}
});
}
// Test 5: Typo in operation
console.log(chalk.yellow('\n📝 Test 5: Typo in operation "downlod"'));
const typoConfig = {
resource: 'file',
operation: 'downlod' // Typo
};
const result5 = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
typoConfig,
node.properties,
'operation',
'ai-friendly'
);
console.log(`Valid: ${result5.valid ? chalk.green('✓') : chalk.red('✗')}`);
if (result5.errors.length > 0) {
console.log(chalk.red('Errors:'));
result5.errors.forEach(error => {
console.log(` - ${error.property}: ${error.message}`);
if (error.fix) {
console.log(chalk.cyan(` Fix: ${error.fix}`));
}
});
}
console.log(chalk.green('\n✅ All tests completed!'));
db.close();
}
// Run tests
testOperationValidation().catch(error => {
console.error(chalk.red('Error running tests:'), error);
process.exit(1);
});

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@@ -248,4 +248,133 @@ export class NodeRepository {
outputNames: row.output_names ? this.safeJsonParse(row.output_names, null) : null
};
}
/**
* Get operations for a specific node, optionally filtered by resource
*/
getNodeOperations(nodeType: string, resource?: string): any[] {
const node = this.getNode(nodeType);
if (!node) return [];
const operations: any[] = [];
// Parse operations field
if (node.operations) {
if (Array.isArray(node.operations)) {
operations.push(...node.operations);
} else if (typeof node.operations === 'object') {
// Operations might be grouped by resource
if (resource && node.operations[resource]) {
return node.operations[resource];
} else {
// Return all operations
Object.values(node.operations).forEach(ops => {
if (Array.isArray(ops)) {
operations.push(...ops);
}
});
}
}
}
// Also check properties for operation fields
if (node.properties && Array.isArray(node.properties)) {
for (const prop of node.properties) {
if (prop.name === 'operation' && prop.options) {
// If resource is specified, filter by displayOptions
if (resource && prop.displayOptions?.show?.resource) {
const allowedResources = Array.isArray(prop.displayOptions.show.resource)
? prop.displayOptions.show.resource
: [prop.displayOptions.show.resource];
if (!allowedResources.includes(resource)) {
continue;
}
}
// Add operations from this property
operations.push(...prop.options);
}
}
}
return operations;
}
/**
* Get all resources defined for a node
*/
getNodeResources(nodeType: string): any[] {
const node = this.getNode(nodeType);
if (!node || !node.properties) return [];
const resources: any[] = [];
// Look for resource property
for (const prop of node.properties) {
if (prop.name === 'resource' && prop.options) {
resources.push(...prop.options);
}
}
return resources;
}
/**
* Get operations that are valid for a specific resource
*/
getOperationsForResource(nodeType: string, resource: string): any[] {
const node = this.getNode(nodeType);
if (!node || !node.properties) return [];
const operations: any[] = [];
// Find operation properties that are visible for this resource
for (const prop of node.properties) {
if (prop.name === 'operation' && prop.displayOptions?.show?.resource) {
const allowedResources = Array.isArray(prop.displayOptions.show.resource)
? prop.displayOptions.show.resource
: [prop.displayOptions.show.resource];
if (allowedResources.includes(resource) && prop.options) {
operations.push(...prop.options);
}
}
}
return operations;
}
/**
* Get all operations across all nodes (for analysis)
*/
getAllOperations(): Map<string, any[]> {
const allOperations = new Map<string, any[]>();
const nodes = this.getAllNodes();
for (const node of nodes) {
const operations = this.getNodeOperations(node.nodeType);
if (operations.length > 0) {
allOperations.set(node.nodeType, operations);
}
}
return allOperations;
}
/**
* Get all resources across all nodes (for analysis)
*/
getAllResources(): Map<string, any[]> {
const allResources = new Map<string, any[]>();
const nodes = this.getAllNodes();
for (const node of nodes) {
const resources = this.getNodeResources(node.nodeType);
if (resources.length > 0) {
allResources.set(node.nodeType, resources);
}
}
return allResources;
}
}

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@@ -0,0 +1,53 @@
/**
* Custom error class for validation service failures
*/
export class ValidationServiceError extends Error {
constructor(
message: string,
public readonly nodeType?: string,
public readonly property?: string,
public readonly cause?: Error
) {
super(message);
this.name = 'ValidationServiceError';
// Maintains proper stack trace for where our error was thrown (only available on V8)
if (Error.captureStackTrace) {
Error.captureStackTrace(this, ValidationServiceError);
}
}
/**
* Create error for JSON parsing failure
*/
static jsonParseError(nodeType: string, cause: Error): ValidationServiceError {
return new ValidationServiceError(
`Failed to parse JSON data for node ${nodeType}`,
nodeType,
undefined,
cause
);
}
/**
* Create error for node not found
*/
static nodeNotFound(nodeType: string): ValidationServiceError {
return new ValidationServiceError(
`Node type ${nodeType} not found in repository`,
nodeType
);
}
/**
* Create error for critical data extraction failure
*/
static dataExtractionError(nodeType: string, dataType: string, cause?: Error): ValidationServiceError {
return new ValidationServiceError(
`Failed to extract ${dataType} for node ${nodeType}`,
nodeType,
dataType,
cause
);
}
}

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@@ -134,6 +134,10 @@ export class N8NDocumentationMCPServer {
this.repository = new NodeRepository(this.db);
this.templateService = new TemplateService(this.db);
// Initialize similarity services for enhanced validation
EnhancedConfigValidator.initializeSimilarityServices(this.repository);
logger.info(`Initialized database from: ${dbPath}`);
} catch (error) {
logger.error('Failed to initialize database:', error);

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@@ -8,6 +8,10 @@
import { ConfigValidator, ValidationResult, ValidationError, ValidationWarning } from './config-validator';
import { NodeSpecificValidators, NodeValidationContext } from './node-specific-validators';
import { FixedCollectionValidator } from '../utils/fixed-collection-validator';
import { OperationSimilarityService } from './operation-similarity-service';
import { ResourceSimilarityService } from './resource-similarity-service';
import { NodeRepository } from '../database/node-repository';
import { DatabaseAdapter } from '../database/database-adapter';
export type ValidationMode = 'full' | 'operation' | 'minimal';
export type ValidationProfile = 'strict' | 'runtime' | 'ai-friendly' | 'minimal';
@@ -35,6 +39,18 @@ export interface OperationContext {
}
export class EnhancedConfigValidator extends ConfigValidator {
private static operationSimilarityService: OperationSimilarityService | null = null;
private static resourceSimilarityService: ResourceSimilarityService | null = null;
private static nodeRepository: NodeRepository | null = null;
/**
* Initialize similarity services (called once at startup)
*/
static initializeSimilarityServices(repository: NodeRepository): void {
this.nodeRepository = repository;
this.operationSimilarityService = new OperationSimilarityService(repository);
this.resourceSimilarityService = new ResourceSimilarityService(repository);
}
/**
* Validate with operation awareness
*/
@@ -214,6 +230,9 @@ export class EnhancedConfigValidator extends ConfigValidator {
return;
}
// Validate resource and operation using similarity services
this.validateResourceAndOperation(nodeType, config, result);
// First, validate fixedCollection properties for known problematic nodes
this.validateFixedCollectionStructures(nodeType, config, result);
@@ -642,4 +661,127 @@ export class EnhancedConfigValidator extends ConfigValidator {
// Add any Filter-node-specific validation here in the future
}
/**
* Validate resource and operation values using similarity services
*/
private static validateResourceAndOperation(
nodeType: string,
config: Record<string, any>,
result: EnhancedValidationResult
): void {
// Skip if similarity services not initialized
if (!this.operationSimilarityService || !this.resourceSimilarityService || !this.nodeRepository) {
return;
}
// Validate resource field if present
if (config.resource !== undefined) {
// Remove any existing resource error from base validator to replace with our enhanced version
result.errors = result.errors.filter(e => e.property !== 'resource');
const validResources = this.nodeRepository.getNodeResources(nodeType);
const resourceIsValid = validResources.some(r => {
const resourceValue = typeof r === 'string' ? r : r.value;
return resourceValue === config.resource;
});
if (!resourceIsValid && config.resource !== '') {
// Find similar resources
const suggestions = this.resourceSimilarityService.findSimilarResources(
nodeType,
config.resource,
3
);
// Build error message with suggestions
let errorMessage = `Invalid resource "${config.resource}" for node ${nodeType}.`;
let fix = '';
if (suggestions.length > 0) {
const topSuggestion = suggestions[0];
// Always use "Did you mean" for the top suggestion
errorMessage += ` Did you mean "${topSuggestion.value}"?`;
if (topSuggestion.confidence >= 0.8) {
fix = `Change resource to "${topSuggestion.value}". ${topSuggestion.reason}`;
} else {
// For lower confidence, still show valid resources in the fix
fix = `Valid resources: ${validResources.slice(0, 5).map(r => {
const val = typeof r === 'string' ? r : r.value;
return `"${val}"`;
}).join(', ')}${validResources.length > 5 ? '...' : ''}`;
}
} else {
// No similar resources found, list valid ones
fix = `Valid resources: ${validResources.slice(0, 5).map(r => {
const val = typeof r === 'string' ? r : r.value;
return `"${val}"`;
}).join(', ')}${validResources.length > 5 ? '...' : ''}`;
}
result.errors.push({
type: 'invalid_value',
property: 'resource',
message: errorMessage,
fix
});
}
}
// Validate operation field if present
if (config.operation !== undefined) {
// Remove any existing operation error from base validator to replace with our enhanced version
result.errors = result.errors.filter(e => e.property !== 'operation');
const validOperations = this.nodeRepository.getNodeOperations(nodeType, config.resource);
const operationIsValid = validOperations.some(op => {
const opValue = op.operation || op.value || op;
return opValue === config.operation;
});
if (!operationIsValid && config.operation !== '') {
// Find similar operations
const suggestions = this.operationSimilarityService.findSimilarOperations(
nodeType,
config.operation,
config.resource,
3
);
// Build error message with suggestions
let errorMessage = `Invalid operation "${config.operation}" for node ${nodeType}`;
if (config.resource) {
errorMessage += ` with resource "${config.resource}"`;
}
errorMessage += '.';
let fix = '';
if (suggestions.length > 0) {
const topSuggestion = suggestions[0];
if (topSuggestion.confidence >= 0.8) {
errorMessage += ` Did you mean "${topSuggestion.value}"?`;
fix = `Change operation to "${topSuggestion.value}". ${topSuggestion.reason}`;
} else {
errorMessage += ` Similar operations: ${suggestions.map(s => `"${s.value}"`).join(', ')}`;
fix = `Valid operations${config.resource ? ` for resource "${config.resource}"` : ''}: ${validOperations.slice(0, 5).map(op => {
const val = op.operation || op.value || op;
return `"${val}"`;
}).join(', ')}${validOperations.length > 5 ? '...' : ''}`;
}
} else {
// No similar operations found, list valid ones
fix = `Valid operations${config.resource ? ` for resource "${config.resource}"` : ''}: ${validOperations.slice(0, 5).map(op => {
const val = op.operation || op.value || op;
return `"${val}"`;
}).join(', ')}${validOperations.length > 5 ? '...' : ''}`;
}
result.errors.push({
type: 'invalid_value',
property: 'operation',
message: errorMessage,
fix
});
}
}
}
}

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@@ -0,0 +1,485 @@
import { NodeRepository } from '../database/node-repository';
import { logger } from '../utils/logger';
import { ValidationServiceError } from '../errors/validation-service-error';
export interface OperationSuggestion {
value: string;
confidence: number;
reason: string;
resource?: string;
description?: string;
}
interface OperationPattern {
pattern: string;
suggestion: string;
confidence: number;
reason: string;
}
export class OperationSimilarityService {
private static readonly CACHE_DURATION_MS = 5 * 60 * 1000; // 5 minutes
private static readonly MIN_CONFIDENCE = 0.3; // 30% minimum confidence to suggest
private static readonly MAX_SUGGESTIONS = 5;
// Confidence thresholds for better code clarity
private static readonly CONFIDENCE_THRESHOLDS = {
EXACT: 1.0,
VERY_HIGH: 0.95,
HIGH: 0.8,
MEDIUM: 0.6,
MIN_SUBSTRING: 0.7
} as const;
private repository: NodeRepository;
private operationCache: Map<string, { operations: any[], timestamp: number }> = new Map();
private suggestionCache: Map<string, OperationSuggestion[]> = new Map();
private commonPatterns: Map<string, OperationPattern[]>;
constructor(repository: NodeRepository) {
this.repository = repository;
this.commonPatterns = this.initializeCommonPatterns();
}
/**
* Clean up expired cache entries to prevent memory leaks
* Should be called periodically or before cache operations
*/
private cleanupExpiredEntries(): void {
const now = Date.now();
// Clean operation cache
for (const [key, value] of this.operationCache.entries()) {
if (now - value.timestamp >= OperationSimilarityService.CACHE_DURATION_MS) {
this.operationCache.delete(key);
}
}
// Clean suggestion cache - these don't have timestamps, so clear if cache is too large
if (this.suggestionCache.size > 100) {
// Keep only the most recent 50 entries
const entries = Array.from(this.suggestionCache.entries());
this.suggestionCache.clear();
entries.slice(-50).forEach(([key, value]) => {
this.suggestionCache.set(key, value);
});
}
}
/**
* Initialize common operation mistake patterns
*/
private initializeCommonPatterns(): Map<string, OperationPattern[]> {
const patterns = new Map<string, OperationPattern[]>();
// Google Drive patterns
patterns.set('googleDrive', [
{ pattern: 'listFiles', suggestion: 'search', confidence: 0.85, reason: 'Use "search" with resource: "fileFolder" to list files' },
{ pattern: 'uploadFile', suggestion: 'upload', confidence: 0.95, reason: 'Use "upload" instead of "uploadFile"' },
{ pattern: 'deleteFile', suggestion: 'deleteFile', confidence: 1.0, reason: 'Exact match' },
{ pattern: 'downloadFile', suggestion: 'download', confidence: 0.95, reason: 'Use "download" instead of "downloadFile"' },
{ pattern: 'getFile', suggestion: 'download', confidence: 0.8, reason: 'Use "download" to retrieve file content' },
{ pattern: 'listFolders', suggestion: 'search', confidence: 0.85, reason: 'Use "search" with resource: "fileFolder"' },
]);
// Slack patterns
patterns.set('slack', [
{ pattern: 'sendMessage', suggestion: 'send', confidence: 0.95, reason: 'Use "send" instead of "sendMessage"' },
{ pattern: 'getMessage', suggestion: 'get', confidence: 0.9, reason: 'Use "get" to retrieve messages' },
{ pattern: 'postMessage', suggestion: 'send', confidence: 0.9, reason: 'Use "send" to post messages' },
{ pattern: 'deleteMessage', suggestion: 'delete', confidence: 0.95, reason: 'Use "delete" instead of "deleteMessage"' },
{ pattern: 'createChannel', suggestion: 'create', confidence: 0.9, reason: 'Use "create" with resource: "channel"' },
]);
// Database patterns (postgres, mysql, mongodb)
patterns.set('database', [
{ pattern: 'selectData', suggestion: 'select', confidence: 0.95, reason: 'Use "select" instead of "selectData"' },
{ pattern: 'insertData', suggestion: 'insert', confidence: 0.95, reason: 'Use "insert" instead of "insertData"' },
{ pattern: 'updateData', suggestion: 'update', confidence: 0.95, reason: 'Use "update" instead of "updateData"' },
{ pattern: 'deleteData', suggestion: 'delete', confidence: 0.95, reason: 'Use "delete" instead of "deleteData"' },
{ pattern: 'query', suggestion: 'select', confidence: 0.7, reason: 'Use "select" for queries' },
{ pattern: 'fetch', suggestion: 'select', confidence: 0.7, reason: 'Use "select" to fetch data' },
]);
// HTTP patterns
patterns.set('httpRequest', [
{ pattern: 'fetch', suggestion: 'GET', confidence: 0.8, reason: 'Use "GET" method for fetching data' },
{ pattern: 'send', suggestion: 'POST', confidence: 0.7, reason: 'Use "POST" method for sending data' },
{ pattern: 'create', suggestion: 'POST', confidence: 0.8, reason: 'Use "POST" method for creating resources' },
{ pattern: 'update', suggestion: 'PUT', confidence: 0.8, reason: 'Use "PUT" method for updating resources' },
{ pattern: 'delete', suggestion: 'DELETE', confidence: 0.9, reason: 'Use "DELETE" method' },
]);
// Generic patterns
patterns.set('generic', [
{ pattern: 'list', suggestion: 'get', confidence: 0.6, reason: 'Consider using "get" or "search"' },
{ pattern: 'retrieve', suggestion: 'get', confidence: 0.8, reason: 'Use "get" to retrieve data' },
{ pattern: 'fetch', suggestion: 'get', confidence: 0.8, reason: 'Use "get" to fetch data' },
{ pattern: 'remove', suggestion: 'delete', confidence: 0.85, reason: 'Use "delete" to remove items' },
{ pattern: 'add', suggestion: 'create', confidence: 0.7, reason: 'Use "create" to add new items' },
]);
return patterns;
}
/**
* Find similar operations for an invalid operation using Levenshtein distance
* and pattern matching algorithms
*
* @param nodeType - The n8n node type (e.g., 'nodes-base.slack')
* @param invalidOperation - The invalid operation provided by the user
* @param resource - Optional resource to filter operations
* @param maxSuggestions - Maximum number of suggestions to return (default: 5)
* @returns Array of operation suggestions sorted by confidence
*
* @example
* findSimilarOperations('nodes-base.googleDrive', 'listFiles', 'fileFolder')
* // Returns: [{ value: 'search', confidence: 0.85, reason: 'Use "search" with resource: "fileFolder" to list files' }]
*/
findSimilarOperations(
nodeType: string,
invalidOperation: string,
resource?: string,
maxSuggestions: number = OperationSimilarityService.MAX_SUGGESTIONS
): OperationSuggestion[] {
// Clean up expired cache entries periodically
if (Math.random() < 0.1) { // 10% chance to cleanup on each call
this.cleanupExpiredEntries();
}
// Check cache first
const cacheKey = `${nodeType}:${invalidOperation}:${resource || ''}`;
if (this.suggestionCache.has(cacheKey)) {
return this.suggestionCache.get(cacheKey)!;
}
const suggestions: OperationSuggestion[] = [];
// Get valid operations for the node
const nodeInfo = this.repository.getNode(nodeType);
if (!nodeInfo) {
return [];
}
const validOperations = this.getNodeOperations(nodeType, resource);
// Early termination for exact match - no suggestions needed
for (const op of validOperations) {
const opValue = this.getOperationValue(op);
if (opValue.toLowerCase() === invalidOperation.toLowerCase()) {
return []; // Valid operation, no suggestions needed
}
}
// Check for exact pattern matches first
const nodePatterns = this.getNodePatterns(nodeType);
for (const pattern of nodePatterns) {
if (pattern.pattern.toLowerCase() === invalidOperation.toLowerCase()) {
// Type-safe operation value extraction
const exists = validOperations.some(op => {
const opValue = this.getOperationValue(op);
return opValue === pattern.suggestion;
});
if (exists) {
suggestions.push({
value: pattern.suggestion,
confidence: pattern.confidence,
reason: pattern.reason,
resource
});
}
}
}
// Calculate similarity for all valid operations
for (const op of validOperations) {
const opValue = this.getOperationValue(op);
const similarity = this.calculateSimilarity(invalidOperation, opValue);
if (similarity >= OperationSimilarityService.MIN_CONFIDENCE) {
// Don't add if already suggested by pattern
if (!suggestions.some(s => s.value === opValue)) {
suggestions.push({
value: opValue,
confidence: similarity,
reason: this.getSimilarityReason(similarity, invalidOperation, opValue),
resource: typeof op === 'object' ? op.resource : undefined,
description: typeof op === 'object' ? (op.description || op.name) : undefined
});
}
}
}
// Sort by confidence and limit
suggestions.sort((a, b) => b.confidence - a.confidence);
const topSuggestions = suggestions.slice(0, maxSuggestions);
// Cache the result
this.suggestionCache.set(cacheKey, topSuggestions);
return topSuggestions;
}
/**
* Type-safe extraction of operation value from various formats
* @param op - Operation object or string
* @returns The operation value as a string
*/
private getOperationValue(op: any): string {
if (typeof op === 'string') {
return op;
}
if (typeof op === 'object' && op !== null) {
return op.operation || op.value || '';
}
return '';
}
/**
* Type-safe extraction of resource value
* @param resource - Resource object or string
* @returns The resource value as a string
*/
private getResourceValue(resource: any): string {
if (typeof resource === 'string') {
return resource;
}
if (typeof resource === 'object' && resource !== null) {
return resource.value || '';
}
return '';
}
/**
* Get operations for a node, handling resource filtering
*/
private getNodeOperations(nodeType: string, resource?: string): any[] {
// Cleanup cache periodically
if (Math.random() < 0.05) { // 5% chance
this.cleanupExpiredEntries();
}
const cacheKey = `${nodeType}:${resource || 'all'}`;
const cached = this.operationCache.get(cacheKey);
if (cached && Date.now() - cached.timestamp < OperationSimilarityService.CACHE_DURATION_MS) {
return cached.operations;
}
const nodeInfo = this.repository.getNode(nodeType);
if (!nodeInfo) return [];
let operations: any[] = [];
// Parse operations from the node with safe JSON parsing
try {
const opsData = nodeInfo.operations;
if (typeof opsData === 'string') {
// Safe JSON parsing
try {
operations = JSON.parse(opsData);
} catch (parseError) {
logger.error(`JSON parse error for operations in ${nodeType}:`, parseError);
throw ValidationServiceError.jsonParseError(nodeType, parseError as Error);
}
} else if (Array.isArray(opsData)) {
operations = opsData;
} else if (opsData && typeof opsData === 'object') {
operations = Object.values(opsData).flat();
}
} catch (error) {
// Re-throw ValidationServiceError, log and continue for others
if (error instanceof ValidationServiceError) {
throw error;
}
logger.warn(`Failed to process operations for ${nodeType}:`, error);
}
// Also check properties for operation fields
try {
const properties = nodeInfo.properties || [];
for (const prop of properties) {
if (prop.name === 'operation' && prop.options) {
// Filter by resource if specified
if (prop.displayOptions?.show?.resource) {
const allowedResources = Array.isArray(prop.displayOptions.show.resource)
? prop.displayOptions.show.resource
: [prop.displayOptions.show.resource];
// Only filter if a specific resource is requested
if (resource && !allowedResources.includes(resource)) {
continue;
}
// If no resource specified, include all operations
}
operations.push(...prop.options.map((opt: any) => ({
operation: opt.value,
name: opt.name,
description: opt.description,
resource
})));
}
}
} catch (error) {
logger.warn(`Failed to extract operations from properties for ${nodeType}:`, error);
}
// Cache and return
this.operationCache.set(cacheKey, { operations, timestamp: Date.now() });
return operations;
}
/**
* Get patterns for a specific node type
*/
private getNodePatterns(nodeType: string): OperationPattern[] {
const patterns: OperationPattern[] = [];
// Add node-specific patterns
if (nodeType.includes('googleDrive')) {
patterns.push(...(this.commonPatterns.get('googleDrive') || []));
} else if (nodeType.includes('slack')) {
patterns.push(...(this.commonPatterns.get('slack') || []));
} else if (nodeType.includes('postgres') || nodeType.includes('mysql') || nodeType.includes('mongodb')) {
patterns.push(...(this.commonPatterns.get('database') || []));
} else if (nodeType.includes('httpRequest')) {
patterns.push(...(this.commonPatterns.get('httpRequest') || []));
}
// Always add generic patterns
patterns.push(...(this.commonPatterns.get('generic') || []));
return patterns;
}
/**
* Calculate similarity between two strings using Levenshtein distance
*/
private calculateSimilarity(str1: string, str2: string): number {
const s1 = str1.toLowerCase();
const s2 = str2.toLowerCase();
// Exact match
if (s1 === s2) return 1.0;
// One is substring of the other
if (s1.includes(s2) || s2.includes(s1)) {
const ratio = Math.min(s1.length, s2.length) / Math.max(s1.length, s2.length);
return Math.max(OperationSimilarityService.CONFIDENCE_THRESHOLDS.MIN_SUBSTRING, ratio);
}
// Calculate Levenshtein distance
const distance = this.levenshteinDistance(s1, s2);
const maxLength = Math.max(s1.length, s2.length);
// Convert distance to similarity (0 to 1)
let similarity = 1 - (distance / maxLength);
// Boost confidence for single character typos and transpositions in short words
if (distance === 1 && maxLength <= 5) {
similarity = Math.max(similarity, 0.75);
} else if (distance === 2 && maxLength <= 5) {
// Boost for transpositions
similarity = Math.max(similarity, 0.72);
}
// Boost similarity for common patterns
if (this.areCommonVariations(s1, s2)) {
return Math.min(1.0, similarity + 0.2);
}
return similarity;
}
/**
* Calculate Levenshtein distance between two strings
*/
private levenshteinDistance(str1: string, str2: string): number {
const m = str1.length;
const n = str2.length;
const dp: number[][] = Array(m + 1).fill(null).map(() => Array(n + 1).fill(0));
for (let i = 0; i <= m; i++) dp[i][0] = i;
for (let j = 0; j <= n; j++) dp[0][j] = j;
for (let i = 1; i <= m; i++) {
for (let j = 1; j <= n; j++) {
if (str1[i - 1] === str2[j - 1]) {
dp[i][j] = dp[i - 1][j - 1];
} else {
dp[i][j] = Math.min(
dp[i - 1][j] + 1, // deletion
dp[i][j - 1] + 1, // insertion
dp[i - 1][j - 1] + 1 // substitution
);
}
}
}
return dp[m][n];
}
/**
* Check if two strings are common variations
*/
private areCommonVariations(str1: string, str2: string): boolean {
// Check for common prefixes/suffixes
const commonPrefixes = ['get', 'set', 'create', 'delete', 'update', 'send', 'fetch'];
const commonSuffixes = ['data', 'item', 'record', 'message', 'file', 'folder'];
for (const prefix of commonPrefixes) {
if ((str1.startsWith(prefix) && !str2.startsWith(prefix)) ||
(!str1.startsWith(prefix) && str2.startsWith(prefix))) {
const s1Clean = str1.replace(prefix, '');
const s2Clean = str2.replace(prefix, '');
if (s1Clean === s2Clean || this.levenshteinDistance(s1Clean, s2Clean) <= 2) {
return true;
}
}
}
for (const suffix of commonSuffixes) {
if ((str1.endsWith(suffix) && !str2.endsWith(suffix)) ||
(!str1.endsWith(suffix) && str2.endsWith(suffix))) {
const s1Clean = str1.replace(suffix, '');
const s2Clean = str2.replace(suffix, '');
if (s1Clean === s2Clean || this.levenshteinDistance(s1Clean, s2Clean) <= 2) {
return true;
}
}
}
return false;
}
/**
* Generate a human-readable reason for the similarity
* @param confidence - Similarity confidence score
* @param invalid - The invalid operation string
* @param valid - The valid operation string
* @returns Human-readable explanation of the similarity
*/
private getSimilarityReason(confidence: number, invalid: string, valid: string): string {
const { VERY_HIGH, HIGH, MEDIUM } = OperationSimilarityService.CONFIDENCE_THRESHOLDS;
if (confidence >= VERY_HIGH) {
return 'Almost exact match - likely a typo';
} else if (confidence >= HIGH) {
return 'Very similar - common variation';
} else if (confidence >= MEDIUM) {
return 'Similar operation';
} else if (invalid.includes(valid) || valid.includes(invalid)) {
return 'Partial match';
} else {
return 'Possibly related operation';
}
}
/**
* Clear caches
*/
clearCache(): void {
this.operationCache.clear();
this.suggestionCache.clear();
}
}

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import { NodeRepository } from '../database/node-repository';
import { logger } from '../utils/logger';
import { ValidationServiceError } from '../errors/validation-service-error';
export interface ResourceSuggestion {
value: string;
confidence: number;
reason: string;
availableOperations?: string[];
}
interface ResourcePattern {
pattern: string;
suggestion: string;
confidence: number;
reason: string;
}
export class ResourceSimilarityService {
private static readonly CACHE_DURATION_MS = 5 * 60 * 1000; // 5 minutes
private static readonly MIN_CONFIDENCE = 0.3; // 30% minimum confidence to suggest
private static readonly MAX_SUGGESTIONS = 5;
// Confidence thresholds for better code clarity
private static readonly CONFIDENCE_THRESHOLDS = {
EXACT: 1.0,
VERY_HIGH: 0.95,
HIGH: 0.8,
MEDIUM: 0.6,
MIN_SUBSTRING: 0.7
} as const;
private repository: NodeRepository;
private resourceCache: Map<string, { resources: any[], timestamp: number }> = new Map();
private suggestionCache: Map<string, ResourceSuggestion[]> = new Map();
private commonPatterns: Map<string, ResourcePattern[]>;
constructor(repository: NodeRepository) {
this.repository = repository;
this.commonPatterns = this.initializeCommonPatterns();
}
/**
* Clean up expired cache entries to prevent memory leaks
*/
private cleanupExpiredEntries(): void {
const now = Date.now();
// Clean resource cache
for (const [key, value] of this.resourceCache.entries()) {
if (now - value.timestamp >= ResourceSimilarityService.CACHE_DURATION_MS) {
this.resourceCache.delete(key);
}
}
// Clean suggestion cache - these don't have timestamps, so clear if cache is too large
if (this.suggestionCache.size > 100) {
// Keep only the most recent 50 entries
const entries = Array.from(this.suggestionCache.entries());
this.suggestionCache.clear();
entries.slice(-50).forEach(([key, value]) => {
this.suggestionCache.set(key, value);
});
}
}
/**
* Initialize common resource mistake patterns
*/
private initializeCommonPatterns(): Map<string, ResourcePattern[]> {
const patterns = new Map<string, ResourcePattern[]>();
// Google Drive patterns
patterns.set('googleDrive', [
{ pattern: 'files', suggestion: 'file', confidence: 0.95, reason: 'Use singular "file" not plural' },
{ pattern: 'folders', suggestion: 'folder', confidence: 0.95, reason: 'Use singular "folder" not plural' },
{ pattern: 'permissions', suggestion: 'permission', confidence: 0.9, reason: 'Use singular form' },
{ pattern: 'fileAndFolder', suggestion: 'fileFolder', confidence: 0.9, reason: 'Use "fileFolder" for combined operations' },
{ pattern: 'driveFiles', suggestion: 'file', confidence: 0.8, reason: 'Use "file" for file operations' },
{ pattern: 'sharedDrives', suggestion: 'drive', confidence: 0.85, reason: 'Use "drive" for shared drive operations' },
]);
// Slack patterns
patterns.set('slack', [
{ pattern: 'messages', suggestion: 'message', confidence: 0.95, reason: 'Use singular "message" not plural' },
{ pattern: 'channels', suggestion: 'channel', confidence: 0.95, reason: 'Use singular "channel" not plural' },
{ pattern: 'users', suggestion: 'user', confidence: 0.95, reason: 'Use singular "user" not plural' },
{ pattern: 'msg', suggestion: 'message', confidence: 0.85, reason: 'Use full "message" not abbreviation' },
{ pattern: 'dm', suggestion: 'message', confidence: 0.7, reason: 'Use "message" for direct messages' },
{ pattern: 'conversation', suggestion: 'channel', confidence: 0.7, reason: 'Use "channel" for conversations' },
]);
// Database patterns (postgres, mysql, mongodb)
patterns.set('database', [
{ pattern: 'tables', suggestion: 'table', confidence: 0.95, reason: 'Use singular "table" not plural' },
{ pattern: 'queries', suggestion: 'query', confidence: 0.95, reason: 'Use singular "query" not plural' },
{ pattern: 'collections', suggestion: 'collection', confidence: 0.95, reason: 'Use singular "collection" not plural' },
{ pattern: 'documents', suggestion: 'document', confidence: 0.95, reason: 'Use singular "document" not plural' },
{ pattern: 'records', suggestion: 'record', confidence: 0.85, reason: 'Use "record" or "document"' },
{ pattern: 'rows', suggestion: 'row', confidence: 0.9, reason: 'Use singular "row"' },
]);
// Google Sheets patterns
patterns.set('googleSheets', [
{ pattern: 'sheets', suggestion: 'sheet', confidence: 0.95, reason: 'Use singular "sheet" not plural' },
{ pattern: 'spreadsheets', suggestion: 'spreadsheet', confidence: 0.95, reason: 'Use singular "spreadsheet"' },
{ pattern: 'cells', suggestion: 'cell', confidence: 0.9, reason: 'Use singular "cell"' },
{ pattern: 'ranges', suggestion: 'range', confidence: 0.9, reason: 'Use singular "range"' },
{ pattern: 'worksheets', suggestion: 'sheet', confidence: 0.8, reason: 'Use "sheet" for worksheet operations' },
]);
// Email patterns
patterns.set('email', [
{ pattern: 'emails', suggestion: 'email', confidence: 0.95, reason: 'Use singular "email" not plural' },
{ pattern: 'messages', suggestion: 'message', confidence: 0.9, reason: 'Use "message" for email operations' },
{ pattern: 'mails', suggestion: 'email', confidence: 0.9, reason: 'Use "email" not "mail"' },
{ pattern: 'attachments', suggestion: 'attachment', confidence: 0.95, reason: 'Use singular "attachment"' },
]);
// Generic plural/singular patterns
patterns.set('generic', [
{ pattern: 'items', suggestion: 'item', confidence: 0.9, reason: 'Use singular form' },
{ pattern: 'objects', suggestion: 'object', confidence: 0.9, reason: 'Use singular form' },
{ pattern: 'entities', suggestion: 'entity', confidence: 0.9, reason: 'Use singular form' },
{ pattern: 'resources', suggestion: 'resource', confidence: 0.9, reason: 'Use singular form' },
{ pattern: 'elements', suggestion: 'element', confidence: 0.9, reason: 'Use singular form' },
]);
return patterns;
}
/**
* Find similar resources for an invalid resource using pattern matching
* and Levenshtein distance algorithms
*
* @param nodeType - The n8n node type (e.g., 'nodes-base.googleDrive')
* @param invalidResource - The invalid resource provided by the user
* @param maxSuggestions - Maximum number of suggestions to return (default: 5)
* @returns Array of resource suggestions sorted by confidence
*
* @example
* findSimilarResources('nodes-base.googleDrive', 'files', 3)
* // Returns: [{ value: 'file', confidence: 0.95, reason: 'Use singular "file" not plural' }]
*/
findSimilarResources(
nodeType: string,
invalidResource: string,
maxSuggestions: number = ResourceSimilarityService.MAX_SUGGESTIONS
): ResourceSuggestion[] {
// Clean up expired cache entries periodically
if (Math.random() < 0.1) { // 10% chance to cleanup on each call
this.cleanupExpiredEntries();
}
// Check cache first
const cacheKey = `${nodeType}:${invalidResource}`;
if (this.suggestionCache.has(cacheKey)) {
return this.suggestionCache.get(cacheKey)!;
}
const suggestions: ResourceSuggestion[] = [];
// Get valid resources for the node
const validResources = this.getNodeResources(nodeType);
// Early termination for exact match - no suggestions needed
for (const resource of validResources) {
const resourceValue = this.getResourceValue(resource);
if (resourceValue.toLowerCase() === invalidResource.toLowerCase()) {
return []; // Valid resource, no suggestions needed
}
}
// Check for exact pattern matches first
const nodePatterns = this.getNodePatterns(nodeType);
for (const pattern of nodePatterns) {
if (pattern.pattern.toLowerCase() === invalidResource.toLowerCase()) {
// Check if the suggested resource actually exists with type safety
const exists = validResources.some(r => {
const resourceValue = this.getResourceValue(r);
return resourceValue === pattern.suggestion;
});
if (exists) {
suggestions.push({
value: pattern.suggestion,
confidence: pattern.confidence,
reason: pattern.reason
});
}
}
}
// Handle automatic plural/singular conversion
const singularForm = this.toSingular(invalidResource);
const pluralForm = this.toPlural(invalidResource);
for (const resource of validResources) {
const resourceValue = this.getResourceValue(resource);
// Check for plural/singular match
if (resourceValue === singularForm || resourceValue === pluralForm) {
if (!suggestions.some(s => s.value === resourceValue)) {
suggestions.push({
value: resourceValue,
confidence: 0.9,
reason: invalidResource.endsWith('s') ?
'Use singular form for resources' :
'Incorrect plural/singular form',
availableOperations: typeof resource === 'object' ? resource.operations : undefined
});
}
}
// Calculate similarity
const similarity = this.calculateSimilarity(invalidResource, resourceValue);
if (similarity >= ResourceSimilarityService.MIN_CONFIDENCE) {
if (!suggestions.some(s => s.value === resourceValue)) {
suggestions.push({
value: resourceValue,
confidence: similarity,
reason: this.getSimilarityReason(similarity, invalidResource, resourceValue),
availableOperations: typeof resource === 'object' ? resource.operations : undefined
});
}
}
}
// Sort by confidence and limit
suggestions.sort((a, b) => b.confidence - a.confidence);
const topSuggestions = suggestions.slice(0, maxSuggestions);
// Cache the result
this.suggestionCache.set(cacheKey, topSuggestions);
return topSuggestions;
}
/**
* Type-safe extraction of resource value from various formats
* @param resource - Resource object or string
* @returns The resource value as a string
*/
private getResourceValue(resource: any): string {
if (typeof resource === 'string') {
return resource;
}
if (typeof resource === 'object' && resource !== null) {
return resource.value || '';
}
return '';
}
/**
* Get resources for a node with caching
*/
private getNodeResources(nodeType: string): any[] {
// Cleanup cache periodically
if (Math.random() < 0.05) { // 5% chance
this.cleanupExpiredEntries();
}
const cacheKey = nodeType;
const cached = this.resourceCache.get(cacheKey);
if (cached && Date.now() - cached.timestamp < ResourceSimilarityService.CACHE_DURATION_MS) {
return cached.resources;
}
const nodeInfo = this.repository.getNode(nodeType);
if (!nodeInfo) return [];
const resources: any[] = [];
const resourceMap: Map<string, string[]> = new Map();
// Parse properties for resource fields
try {
const properties = nodeInfo.properties || [];
for (const prop of properties) {
if (prop.name === 'resource' && prop.options) {
for (const option of prop.options) {
resources.push({
value: option.value,
name: option.name,
operations: []
});
resourceMap.set(option.value, []);
}
}
// Find operations for each resource
if (prop.name === 'operation' && prop.displayOptions?.show?.resource) {
const resourceValues = Array.isArray(prop.displayOptions.show.resource)
? prop.displayOptions.show.resource
: [prop.displayOptions.show.resource];
for (const resourceValue of resourceValues) {
if (resourceMap.has(resourceValue) && prop.options) {
const ops = prop.options.map((op: any) => op.value);
resourceMap.get(resourceValue)!.push(...ops);
}
}
}
}
// Update resources with their operations
for (const resource of resources) {
if (resourceMap.has(resource.value)) {
resource.operations = resourceMap.get(resource.value);
}
}
// If no explicit resources, check for common patterns
if (resources.length === 0) {
// Some nodes don't have explicit resource fields
const implicitResources = this.extractImplicitResources(properties);
resources.push(...implicitResources);
}
} catch (error) {
logger.warn(`Failed to extract resources for ${nodeType}:`, error);
}
// Cache and return
this.resourceCache.set(cacheKey, { resources, timestamp: Date.now() });
return resources;
}
/**
* Extract implicit resources from node properties
*/
private extractImplicitResources(properties: any[]): any[] {
const resources: any[] = [];
// Look for properties that suggest resources
for (const prop of properties) {
if (prop.name === 'operation' && prop.options) {
// If there's no explicit resource field, operations might imply resources
const resourceFromOps = this.inferResourceFromOperations(prop.options);
if (resourceFromOps) {
resources.push({
value: resourceFromOps,
name: resourceFromOps.charAt(0).toUpperCase() + resourceFromOps.slice(1),
operations: prop.options.map((op: any) => op.value)
});
}
}
}
return resources;
}
/**
* Infer resource type from operations
*/
private inferResourceFromOperations(operations: any[]): string | null {
// Common patterns in operation names that suggest resources
const patterns = [
{ keywords: ['file', 'upload', 'download'], resource: 'file' },
{ keywords: ['folder', 'directory'], resource: 'folder' },
{ keywords: ['message', 'send', 'reply'], resource: 'message' },
{ keywords: ['channel', 'broadcast'], resource: 'channel' },
{ keywords: ['user', 'member'], resource: 'user' },
{ keywords: ['table', 'row', 'column'], resource: 'table' },
{ keywords: ['document', 'doc'], resource: 'document' },
];
for (const pattern of patterns) {
for (const op of operations) {
const opName = (op.value || op).toLowerCase();
if (pattern.keywords.some(keyword => opName.includes(keyword))) {
return pattern.resource;
}
}
}
return null;
}
/**
* Get patterns for a specific node type
*/
private getNodePatterns(nodeType: string): ResourcePattern[] {
const patterns: ResourcePattern[] = [];
// Add node-specific patterns
if (nodeType.includes('googleDrive')) {
patterns.push(...(this.commonPatterns.get('googleDrive') || []));
} else if (nodeType.includes('slack')) {
patterns.push(...(this.commonPatterns.get('slack') || []));
} else if (nodeType.includes('postgres') || nodeType.includes('mysql') || nodeType.includes('mongodb')) {
patterns.push(...(this.commonPatterns.get('database') || []));
} else if (nodeType.includes('googleSheets')) {
patterns.push(...(this.commonPatterns.get('googleSheets') || []));
} else if (nodeType.includes('gmail') || nodeType.includes('email')) {
patterns.push(...(this.commonPatterns.get('email') || []));
}
// Always add generic patterns
patterns.push(...(this.commonPatterns.get('generic') || []));
return patterns;
}
/**
* Convert to singular form (simple heuristic)
*/
private toSingular(word: string): string {
if (word.endsWith('ies')) {
return word.slice(0, -3) + 'y';
} else if (word.endsWith('es')) {
return word.slice(0, -2);
} else if (word.endsWith('s') && !word.endsWith('ss')) {
return word.slice(0, -1);
}
return word;
}
/**
* Convert to plural form (simple heuristic)
*/
private toPlural(word: string): string {
if (word.endsWith('y') && !['ay', 'ey', 'iy', 'oy', 'uy'].includes(word.slice(-2))) {
return word.slice(0, -1) + 'ies';
} else if (word.endsWith('s') || word.endsWith('x') || word.endsWith('z') ||
word.endsWith('ch') || word.endsWith('sh')) {
return word + 'es';
} else {
return word + 's';
}
}
/**
* Calculate similarity between two strings using Levenshtein distance
*/
private calculateSimilarity(str1: string, str2: string): number {
const s1 = str1.toLowerCase();
const s2 = str2.toLowerCase();
// Exact match
if (s1 === s2) return 1.0;
// One is substring of the other
if (s1.includes(s2) || s2.includes(s1)) {
const ratio = Math.min(s1.length, s2.length) / Math.max(s1.length, s2.length);
return Math.max(ResourceSimilarityService.CONFIDENCE_THRESHOLDS.MIN_SUBSTRING, ratio);
}
// Calculate Levenshtein distance
const distance = this.levenshteinDistance(s1, s2);
const maxLength = Math.max(s1.length, s2.length);
// Convert distance to similarity
let similarity = 1 - (distance / maxLength);
// Boost confidence for single character typos and transpositions in short words
if (distance === 1 && maxLength <= 5) {
similarity = Math.max(similarity, 0.75);
} else if (distance === 2 && maxLength <= 5) {
// Boost for transpositions (e.g., "flie" -> "file")
similarity = Math.max(similarity, 0.72);
}
return similarity;
}
/**
* Calculate Levenshtein distance between two strings
*/
private levenshteinDistance(str1: string, str2: string): number {
const m = str1.length;
const n = str2.length;
const dp: number[][] = Array(m + 1).fill(null).map(() => Array(n + 1).fill(0));
for (let i = 0; i <= m; i++) dp[i][0] = i;
for (let j = 0; j <= n; j++) dp[0][j] = j;
for (let i = 1; i <= m; i++) {
for (let j = 1; j <= n; j++) {
if (str1[i - 1] === str2[j - 1]) {
dp[i][j] = dp[i - 1][j - 1];
} else {
dp[i][j] = Math.min(
dp[i - 1][j] + 1, // deletion
dp[i][j - 1] + 1, // insertion
dp[i - 1][j - 1] + 1 // substitution
);
}
}
}
return dp[m][n];
}
/**
* Generate a human-readable reason for the similarity
* @param confidence - Similarity confidence score
* @param invalid - The invalid resource string
* @param valid - The valid resource string
* @returns Human-readable explanation of the similarity
*/
private getSimilarityReason(confidence: number, invalid: string, valid: string): string {
const { VERY_HIGH, HIGH, MEDIUM } = ResourceSimilarityService.CONFIDENCE_THRESHOLDS;
if (confidence >= VERY_HIGH) {
return 'Almost exact match - likely a typo';
} else if (confidence >= HIGH) {
return 'Very similar - common variation';
} else if (confidence >= MEDIUM) {
return 'Similar resource name';
} else if (invalid.includes(valid) || valid.includes(invalid)) {
return 'Partial match';
} else {
return 'Possibly related resource';
}
}
/**
* Clear caches
*/
clearCache(): void {
this.resourceCache.clear();
this.suggestionCache.clear();
}
}

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/**
* Tests for EnhancedConfigValidator operation and resource validation
*/
import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { EnhancedConfigValidator } from '../../../src/services/enhanced-config-validator';
import { NodeRepository } from '../../../src/database/node-repository';
import { createTestDatabase } from '../../utils/database-utils';
describe('EnhancedConfigValidator - Operation and Resource Validation', () => {
let repository: NodeRepository;
let testDb: any;
beforeEach(async () => {
testDb = await createTestDatabase();
repository = testDb.nodeRepository;
// Initialize similarity services
EnhancedConfigValidator.initializeSimilarityServices(repository);
// Add Google Drive test node
const googleDriveNode = {
nodeType: 'nodes-base.googleDrive',
packageName: 'n8n-nodes-base',
displayName: 'Google Drive',
description: 'Access Google Drive',
category: 'transform',
style: 'declarative',
isAITool: false,
isTrigger: false,
isWebhook: false,
isVersioned: true,
version: 1,
properties: [
{
name: 'resource',
type: 'options',
required: true,
options: [
{ value: 'file', name: 'File' },
{ value: 'folder', name: 'Folder' },
{ value: 'fileFolder', name: 'File & Folder' }
]
},
{
name: 'operation',
type: 'options',
required: true,
displayOptions: {
show: {
resource: ['file']
}
},
options: [
{ value: 'copy', name: 'Copy' },
{ value: 'delete', name: 'Delete' },
{ value: 'download', name: 'Download' },
{ value: 'list', name: 'List' },
{ value: 'share', name: 'Share' },
{ value: 'update', name: 'Update' },
{ value: 'upload', name: 'Upload' }
]
},
{
name: 'operation',
type: 'options',
required: true,
displayOptions: {
show: {
resource: ['folder']
}
},
options: [
{ value: 'create', name: 'Create' },
{ value: 'delete', name: 'Delete' },
{ value: 'share', name: 'Share' }
]
},
{
name: 'operation',
type: 'options',
required: true,
displayOptions: {
show: {
resource: ['fileFolder']
}
},
options: [
{ value: 'search', name: 'Search' }
]
}
],
operations: [],
credentials: []
};
repository.saveNode(googleDriveNode);
// Add Slack test node
const slackNode = {
nodeType: 'nodes-base.slack',
packageName: 'n8n-nodes-base',
displayName: 'Slack',
description: 'Send messages to Slack',
category: 'communication',
style: 'declarative',
isAITool: false,
isTrigger: false,
isWebhook: false,
isVersioned: true,
version: 2,
properties: [
{
name: 'resource',
type: 'options',
required: true,
options: [
{ value: 'channel', name: 'Channel' },
{ value: 'message', name: 'Message' },
{ value: 'user', name: 'User' }
]
},
{
name: 'operation',
type: 'options',
required: true,
displayOptions: {
show: {
resource: ['message']
}
},
options: [
{ value: 'send', name: 'Send' },
{ value: 'update', name: 'Update' },
{ value: 'delete', name: 'Delete' }
]
}
],
operations: [],
credentials: []
};
repository.saveNode(slackNode);
});
afterEach(async () => {
// Clean up database
if (testDb) {
await testDb.cleanup();
}
});
describe('Invalid Operations', () => {
it('should detect invalid operation "listFiles" for Google Drive', () => {
const config = {
resource: 'fileFolder',
operation: 'listFiles'
};
const node = repository.getNode('nodes-base.googleDrive');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
// Should have an error for invalid operation
const operationError = result.errors.find(e => e.property === 'operation');
expect(operationError).toBeDefined();
expect(operationError!.message).toContain('Invalid operation "listFiles"');
expect(operationError!.message).toContain('Did you mean');
expect(operationError!.fix).toContain('search'); // Should suggest 'search' for fileFolder resource
});
it('should provide suggestions for typos in operations', () => {
const config = {
resource: 'file',
operation: 'downlod' // Typo: missing 'a'
};
const node = repository.getNode('nodes-base.googleDrive');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
const operationError = result.errors.find(e => e.property === 'operation');
expect(operationError).toBeDefined();
expect(operationError!.message).toContain('Did you mean "download"');
});
it('should list valid operations for the resource', () => {
const config = {
resource: 'folder',
operation: 'upload' // Invalid for folder resource
};
const node = repository.getNode('nodes-base.googleDrive');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
const operationError = result.errors.find(e => e.property === 'operation');
expect(operationError).toBeDefined();
expect(operationError!.fix).toContain('Valid operations for resource "folder"');
expect(operationError!.fix).toContain('create');
expect(operationError!.fix).toContain('delete');
expect(operationError!.fix).toContain('share');
});
});
describe('Invalid Resources', () => {
it('should detect plural resource "files" and suggest singular', () => {
const config = {
resource: 'files', // Should be 'file'
operation: 'list'
};
const node = repository.getNode('nodes-base.googleDrive');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
const resourceError = result.errors.find(e => e.property === 'resource');
expect(resourceError).toBeDefined();
expect(resourceError!.message).toContain('Invalid resource "files"');
expect(resourceError!.message).toContain('Did you mean "file"');
expect(resourceError!.fix).toContain('Use singular');
});
it('should suggest similar resources for typos', () => {
const config = {
resource: 'flie', // Typo
operation: 'download'
};
const node = repository.getNode('nodes-base.googleDrive');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
const resourceError = result.errors.find(e => e.property === 'resource');
expect(resourceError).toBeDefined();
expect(resourceError!.message).toContain('Did you mean "file"');
});
it('should list valid resources when no match found', () => {
const config = {
resource: 'document', // Not a valid resource
operation: 'create'
};
const node = repository.getNode('nodes-base.googleDrive');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
const resourceError = result.errors.find(e => e.property === 'resource');
expect(resourceError).toBeDefined();
expect(resourceError!.fix).toContain('Valid resources:');
expect(resourceError!.fix).toContain('file');
expect(resourceError!.fix).toContain('folder');
});
});
describe('Combined Resource and Operation Validation', () => {
it('should validate both resource and operation together', () => {
const config = {
resource: 'files', // Invalid: should be singular
operation: 'listFiles' // Invalid: should be 'list' or 'search'
};
const node = repository.getNode('nodes-base.googleDrive');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
expect(result.errors.length).toBeGreaterThanOrEqual(2);
// Should have error for resource
const resourceError = result.errors.find(e => e.property === 'resource');
expect(resourceError).toBeDefined();
expect(resourceError!.message).toContain('files');
// Should have error for operation
const operationError = result.errors.find(e => e.property === 'operation');
expect(operationError).toBeDefined();
expect(operationError!.message).toContain('listFiles');
});
});
describe('Slack Node Validation', () => {
it('should suggest "send" instead of "sendMessage"', () => {
const config = {
resource: 'message',
operation: 'sendMessage' // Common mistake
};
const node = repository.getNode('nodes-base.slack');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.slack',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
const operationError = result.errors.find(e => e.property === 'operation');
expect(operationError).toBeDefined();
expect(operationError!.message).toContain('Did you mean "send"');
});
it('should suggest singular "channel" instead of "channels"', () => {
const config = {
resource: 'channels', // Should be singular
operation: 'create'
};
const node = repository.getNode('nodes-base.slack');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.slack',
config,
node.properties,
'operation',
'ai-friendly'
);
expect(result.valid).toBe(false);
const resourceError = result.errors.find(e => e.property === 'resource');
expect(resourceError).toBeDefined();
expect(resourceError!.message).toContain('Did you mean "channel"');
});
});
describe('Valid Configurations', () => {
it('should accept valid Google Drive configuration', () => {
const config = {
resource: 'file',
operation: 'download'
};
const node = repository.getNode('nodes-base.googleDrive');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.googleDrive',
config,
node.properties,
'operation',
'ai-friendly'
);
// Should not have errors for resource or operation
const resourceError = result.errors.find(e => e.property === 'resource');
const operationError = result.errors.find(e => e.property === 'operation');
expect(resourceError).toBeUndefined();
expect(operationError).toBeUndefined();
});
it('should accept valid Slack configuration', () => {
const config = {
resource: 'message',
operation: 'send'
};
const node = repository.getNode('nodes-base.slack');
const result = EnhancedConfigValidator.validateWithMode(
'nodes-base.slack',
config,
node.properties,
'operation',
'ai-friendly'
);
// Should not have errors for resource or operation
const resourceError = result.errors.find(e => e.property === 'resource');
const operationError = result.errors.find(e => e.property === 'operation');
expect(resourceError).toBeUndefined();
expect(operationError).toBeUndefined();
});
});
});

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/**
* Tests for OperationSimilarityService
*/
import { describe, it, expect, beforeEach } from 'vitest';
import { OperationSimilarityService } from '../../../src/services/operation-similarity-service';
import { NodeRepository } from '../../../src/database/node-repository';
import { createTestDatabase } from '../../utils/database-utils';
describe('OperationSimilarityService', () => {
let service: OperationSimilarityService;
let repository: NodeRepository;
let testDb: any;
beforeEach(async () => {
testDb = await createTestDatabase();
repository = testDb.nodeRepository;
service = new OperationSimilarityService(repository);
// Add test node with operations
const testNode = {
nodeType: 'nodes-base.googleDrive',
packageName: 'n8n-nodes-base',
displayName: 'Google Drive',
description: 'Access Google Drive',
category: 'transform',
style: 'declarative',
isAITool: false,
isTrigger: false,
isWebhook: false,
isVersioned: true,
version: 1,
properties: [
{
name: 'resource',
type: 'options',
options: [
{ value: 'file', name: 'File' },
{ value: 'folder', name: 'Folder' },
{ value: 'drive', name: 'Shared Drive' },
]
},
{
name: 'operation',
type: 'options',
displayOptions: {
show: {
resource: ['file']
}
},
options: [
{ value: 'copy', name: 'Copy' },
{ value: 'delete', name: 'Delete' },
{ value: 'download', name: 'Download' },
{ value: 'list', name: 'List' },
{ value: 'share', name: 'Share' },
{ value: 'update', name: 'Update' },
{ value: 'upload', name: 'Upload' }
]
},
{
name: 'operation',
type: 'options',
displayOptions: {
show: {
resource: ['folder']
}
},
options: [
{ value: 'create', name: 'Create' },
{ value: 'delete', name: 'Delete' },
{ value: 'share', name: 'Share' }
]
}
],
operations: [],
credentials: []
};
repository.saveNode(testNode);
});
afterEach(async () => {
if (testDb) {
await testDb.cleanup();
}
});
describe('findSimilarOperations', () => {
it('should find exact match', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'download',
'file'
);
expect(suggestions).toHaveLength(0); // No suggestions for valid operation
});
it('should suggest similar operations for typos', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'downlod',
'file'
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('download');
expect(suggestions[0].confidence).toBeGreaterThan(0.8);
});
it('should handle common mistakes with patterns', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'uploadFile',
'file'
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('upload');
expect(suggestions[0].reason).toContain('instead of');
});
it('should filter operations by resource', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'upload',
'folder'
);
// Upload is not valid for folder resource
expect(suggestions).toBeDefined();
expect(suggestions.find(s => s.value === 'upload')).toBeUndefined();
});
it('should return empty array for node not found', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.nonexistent',
'operation',
undefined
);
expect(suggestions).toEqual([]);
});
it('should handle operations without resource filtering', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'updat', // Missing 'e' at the end
undefined
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('update');
});
});
describe('similarity calculation', () => {
it('should rank exact matches highest', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'delete',
'file'
);
expect(suggestions).toHaveLength(0); // Exact match, no suggestions needed
});
it('should rank substring matches high', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'del',
'file'
);
expect(suggestions.length).toBeGreaterThan(0);
const deleteSuggestion = suggestions.find(s => s.value === 'delete');
expect(deleteSuggestion).toBeDefined();
expect(deleteSuggestion!.confidence).toBeGreaterThanOrEqual(0.7);
});
it('should detect common variations', () => {
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'getData',
'file'
);
expect(suggestions.length).toBeGreaterThan(0);
// Should suggest 'download' or similar
});
});
describe('caching', () => {
it('should cache results for repeated queries', () => {
// First call
const suggestions1 = service.findSimilarOperations(
'nodes-base.googleDrive',
'downlod',
'file'
);
// Second call with same params
const suggestions2 = service.findSimilarOperations(
'nodes-base.googleDrive',
'downlod',
'file'
);
expect(suggestions1).toEqual(suggestions2);
});
it('should clear cache when requested', () => {
// Add to cache
service.findSimilarOperations(
'nodes-base.googleDrive',
'test',
'file'
);
// Clear cache
service.clearCache();
// This would fetch fresh data (behavior is the same, just uncached)
const suggestions = service.findSimilarOperations(
'nodes-base.googleDrive',
'test',
'file'
);
expect(suggestions).toBeDefined();
});
});
});

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/**
* Tests for ResourceSimilarityService
*/
import { describe, it, expect, beforeEach } from 'vitest';
import { ResourceSimilarityService } from '../../../src/services/resource-similarity-service';
import { NodeRepository } from '../../../src/database/node-repository';
import { createTestDatabase } from '../../utils/database-utils';
describe('ResourceSimilarityService', () => {
let service: ResourceSimilarityService;
let repository: NodeRepository;
let testDb: any;
beforeEach(async () => {
testDb = await createTestDatabase();
repository = testDb.nodeRepository;
service = new ResourceSimilarityService(repository);
// Add test node with resources
const testNode = {
nodeType: 'nodes-base.googleDrive',
packageName: 'n8n-nodes-base',
displayName: 'Google Drive',
description: 'Access Google Drive',
category: 'transform',
style: 'declarative',
isAITool: false,
isTrigger: false,
isWebhook: false,
isVersioned: true,
version: 1,
properties: [
{
name: 'resource',
type: 'options',
options: [
{ value: 'file', name: 'File' },
{ value: 'folder', name: 'Folder' },
{ value: 'drive', name: 'Shared Drive' },
{ value: 'fileFolder', name: 'File & Folder' }
]
}
],
operations: [],
credentials: []
};
repository.saveNode(testNode);
// Add Slack node for testing different patterns
const slackNode = {
nodeType: 'nodes-base.slack',
packageName: 'n8n-nodes-base',
displayName: 'Slack',
description: 'Send messages to Slack',
category: 'communication',
style: 'declarative',
isAITool: false,
isTrigger: false,
isWebhook: false,
isVersioned: true,
version: 2,
properties: [
{
name: 'resource',
type: 'options',
options: [
{ value: 'channel', name: 'Channel' },
{ value: 'message', name: 'Message' },
{ value: 'user', name: 'User' },
{ value: 'file', name: 'File' },
{ value: 'star', name: 'Star' }
]
}
],
operations: [],
credentials: []
};
repository.saveNode(slackNode);
});
afterEach(async () => {
if (testDb) {
await testDb.cleanup();
}
});
describe('findSimilarResources', () => {
it('should find exact match', () => {
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'file',
5
);
expect(suggestions).toHaveLength(0); // No suggestions for valid resource
});
it('should suggest singular form for plural input', () => {
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'files',
5
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('file');
expect(suggestions[0].confidence).toBeGreaterThanOrEqual(0.9);
expect(suggestions[0].reason).toContain('singular');
});
it('should suggest singular form for folders', () => {
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'folders',
5
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('folder');
expect(suggestions[0].confidence).toBeGreaterThanOrEqual(0.9);
});
it('should handle typos with Levenshtein distance', () => {
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'flie',
5
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('file');
expect(suggestions[0].confidence).toBeGreaterThan(0.7);
});
it('should handle combined resources', () => {
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'fileAndFolder',
5
);
expect(suggestions.length).toBeGreaterThan(0);
// Should suggest 'fileFolder' (the actual combined resource)
const fileFolderSuggestion = suggestions.find(s => s.value === 'fileFolder');
expect(fileFolderSuggestion).toBeDefined();
});
it('should return empty array for node not found', () => {
const suggestions = service.findSimilarResources(
'nodes-base.nonexistent',
'resource',
5
);
expect(suggestions).toEqual([]);
});
});
describe('plural/singular detection', () => {
it('should handle regular plurals (s)', () => {
const suggestions = service.findSimilarResources(
'nodes-base.slack',
'channels',
5
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('channel');
});
it('should handle plural ending in es', () => {
const suggestions = service.findSimilarResources(
'nodes-base.slack',
'messages',
5
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('message');
});
it('should handle plural ending in ies', () => {
// Test with a hypothetical 'entities' -> 'entity' conversion
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'entities',
5
);
// Should not crash and provide some suggestions
expect(suggestions).toBeDefined();
});
});
describe('node-specific patterns', () => {
it('should apply Google Drive specific patterns', () => {
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'sharedDrives',
5
);
expect(suggestions.length).toBeGreaterThan(0);
const driveSuggestion = suggestions.find(s => s.value === 'drive');
expect(driveSuggestion).toBeDefined();
});
it('should apply Slack specific patterns', () => {
const suggestions = service.findSimilarResources(
'nodes-base.slack',
'users',
5
);
expect(suggestions.length).toBeGreaterThan(0);
expect(suggestions[0].value).toBe('user');
});
});
describe('similarity calculation', () => {
it('should rank exact matches highest', () => {
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'file',
5
);
expect(suggestions).toHaveLength(0); // Exact match, no suggestions
});
it('should rank substring matches high', () => {
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'fil',
5
);
expect(suggestions.length).toBeGreaterThan(0);
const fileSuggestion = suggestions.find(s => s.value === 'file');
expect(fileSuggestion).toBeDefined();
expect(fileSuggestion!.confidence).toBeGreaterThanOrEqual(0.7);
});
});
describe('caching', () => {
it('should cache results for repeated queries', () => {
// First call
const suggestions1 = service.findSimilarResources(
'nodes-base.googleDrive',
'files',
5
);
// Second call with same params
const suggestions2 = service.findSimilarResources(
'nodes-base.googleDrive',
'files',
5
);
expect(suggestions1).toEqual(suggestions2);
});
it('should clear cache when requested', () => {
// Add to cache
service.findSimilarResources(
'nodes-base.googleDrive',
'test',
5
);
// Clear cache
service.clearCache();
// This would fetch fresh data (behavior is the same, just uncached)
const suggestions = service.findSimilarResources(
'nodes-base.googleDrive',
'test',
5
);
expect(suggestions).toBeDefined();
});
});
});