mirror of
https://github.com/czlonkowski/n8n-mcp.git
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feat: implement webhook path autofixer and improve node similarity service
- Add webhook path auto-generation for nodes missing path configuration - Generates UUID for both 'path' parameter and 'webhookId' field - Conditionally updates typeVersion to 2.1 only when < 2.1 - High confidence fix (95%) as UUID generation is deterministic - Fix critical security and performance issues in NodeSimilarityService: - Replace regex patterns with string-based matching to prevent ReDoS attacks - Add cache invalidation with version tracking to prevent memory leaks - Optimize Levenshtein distance algorithm from O(m*n) space to O(n) - Add early termination for performance improvement - Extract magic numbers into named constants - Add comprehensive documentation for n8n_autofix_workflow tool - Document all fix types including new webhook-missing-path - Include examples, best practices, and warnings - Integrate with MCP tool documentation system - Create node-type-utils for centralized type normalization - Eliminate code duplication across services - Consistent handling of package prefixes 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
czlonkowski
@@ -246,8 +246,8 @@ const autofixWorkflowSchema = z.object({
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'expression-format',
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'typeversion-correction',
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'error-output-config',
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'required-field',
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'enum-value'
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'node-type-correction',
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'webhook-missing-path'
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])).optional(),
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confidenceThreshold: z.enum(['high', 'medium', 'low']).optional().default('medium'),
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maxFixes: z.number().optional().default(50)
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125
src/mcp/tool-docs/workflow_management/n8n-autofix-workflow.ts
Normal file
125
src/mcp/tool-docs/workflow_management/n8n-autofix-workflow.ts
Normal file
@@ -0,0 +1,125 @@
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import { ToolDocumentation } from '../types';
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export const n8nAutofixWorkflowDoc: ToolDocumentation = {
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name: 'n8n_autofix_workflow',
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category: 'workflow_management',
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essentials: {
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description: 'Automatically fix common workflow validation errors - expression formats, typeVersions, error outputs, webhook paths',
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keyParameters: ['id', 'applyFixes'],
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example: 'n8n_autofix_workflow({id: "wf_abc123", applyFixes: false})',
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performance: 'Network-dependent (200-1000ms) - fetches, validates, and optionally updates workflow',
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tips: [
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'Use applyFixes: false to preview changes before applying',
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'Set confidenceThreshold to control fix aggressiveness (high/medium/low)',
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'Supports fixing expression formats, typeVersion issues, error outputs, node type corrections, and webhook paths',
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'High-confidence fixes (≥90%) are safe for auto-application'
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]
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},
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full: {
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description: `Automatically detects and fixes common workflow validation errors in n8n workflows. This tool:
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- Fetches the workflow from your n8n instance
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- Runs comprehensive validation to detect issues
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- Generates targeted fixes for common problems
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- Optionally applies the fixes back to the workflow
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The auto-fixer can resolve:
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1. **Expression Format Issues**: Missing '=' prefix in n8n expressions (e.g., {{ $json.field }} → ={{ $json.field }})
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2. **TypeVersion Corrections**: Downgrades nodes with unsupported typeVersions to maximum supported
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3. **Error Output Configuration**: Removes conflicting onError settings when error connections are missing
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4. **Node Type Corrections**: Intelligently fixes unknown node types using similarity matching:
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- Handles deprecated package prefixes (n8n-nodes-base. → nodes-base.)
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- Corrects capitalization mistakes (HttpRequest → httpRequest)
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- Suggests correct packages (nodes-base.openai → nodes-langchain.openAi)
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- Uses multi-factor scoring: name similarity, category match, package match, pattern match
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- Only auto-fixes suggestions with ≥90% confidence
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- Leverages NodeSimilarityService with 5-minute caching for performance
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5. **Webhook Path Generation**: Automatically generates UUIDs for webhook nodes missing path configuration:
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- Generates a unique UUID for webhook path
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- Sets both 'path' parameter and 'webhookId' field to the same UUID
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- Ensures webhook nodes become functional with valid endpoints
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- High confidence fix as UUID generation is deterministic
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The tool uses a confidence-based system to ensure safe fixes:
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- **High (≥90%)**: Safe to auto-apply (exact matches, known patterns)
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- **Medium (70-89%)**: Generally safe but review recommended
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- **Low (<70%)**: Manual review strongly recommended
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Requires N8N_API_URL and N8N_API_KEY environment variables to be configured.`,
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parameters: {
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id: {
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type: 'string',
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required: true,
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description: 'The workflow ID to fix in your n8n instance'
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},
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applyFixes: {
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type: 'boolean',
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required: false,
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description: 'Whether to apply fixes to the workflow (default: false - preview mode). When false, returns proposed fixes without modifying the workflow.'
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},
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fixTypes: {
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type: 'array',
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required: false,
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description: 'Types of fixes to apply. Options: ["expression-format", "typeversion-correction", "error-output-config", "node-type-correction", "webhook-missing-path"]. Default: all types.'
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},
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confidenceThreshold: {
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type: 'string',
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required: false,
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description: 'Minimum confidence level for fixes: "high" (≥90%), "medium" (≥70%), "low" (any). Default: "medium".'
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},
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maxFixes: {
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type: 'number',
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required: false,
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description: 'Maximum number of fixes to apply (default: 50). Useful for limiting scope of changes.'
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}
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},
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returns: `AutoFixResult object containing:
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- operations: Array of diff operations that will be/were applied
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- fixes: Detailed list of individual fixes with before/after values
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- summary: Human-readable summary of fixes
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- stats: Statistics by fix type and confidence level
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- applied: Boolean indicating if fixes were applied (when applyFixes: true)`,
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examples: [
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'n8n_autofix_workflow({id: "wf_abc123"}) - Preview all possible fixes',
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'n8n_autofix_workflow({id: "wf_abc123", applyFixes: true}) - Apply all medium+ confidence fixes',
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'n8n_autofix_workflow({id: "wf_abc123", applyFixes: true, confidenceThreshold: "high"}) - Only apply high-confidence fixes',
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'n8n_autofix_workflow({id: "wf_abc123", fixTypes: ["expression-format"]}) - Only fix expression format issues',
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'n8n_autofix_workflow({id: "wf_abc123", fixTypes: ["webhook-missing-path"]}) - Only fix webhook path issues',
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'n8n_autofix_workflow({id: "wf_abc123", applyFixes: true, maxFixes: 10}) - Apply up to 10 fixes'
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],
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useCases: [
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'Fixing workflows imported from older n8n versions',
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'Correcting expression syntax after manual edits',
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'Resolving typeVersion conflicts after n8n upgrades',
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'Cleaning up workflows before production deployment',
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'Batch fixing common issues across multiple workflows',
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'Migrating workflows between n8n instances with different versions',
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'Repairing webhook nodes that lost their path configuration'
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],
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performance: 'Depends on workflow size and number of issues. Preview mode: 200-500ms. Apply mode: 500-1000ms for medium workflows. Node similarity matching is cached for 5 minutes for improved performance on repeated validations.',
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bestPractices: [
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'Always preview fixes first (applyFixes: false) before applying',
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'Start with high confidence threshold for production workflows',
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'Review the fix summary to understand what changed',
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'Test workflows after auto-fixing to ensure expected behavior',
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'Use fixTypes parameter to target specific issue categories',
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'Keep maxFixes reasonable to avoid too many changes at once'
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],
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pitfalls: [
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'Some fixes may change workflow behavior - always test after fixing',
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'Low confidence fixes might not be the intended solution',
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'Expression format fixes assume standard n8n syntax requirements',
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'Node type corrections only work for known node types in the database',
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'Cannot fix structural issues like missing nodes or invalid connections',
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'TypeVersion downgrades might remove node features added in newer versions',
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'Generated webhook paths are new UUIDs - existing webhook URLs will change'
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],
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relatedTools: [
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'n8n_validate_workflow',
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'validate_workflow',
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'n8n_update_partial_workflow',
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'validate_workflow_expressions',
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'validate_node_operation'
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]
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}
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};
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@@ -270,6 +270,41 @@ export const n8nManagementTools: ToolDefinition[] = [
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required: ['id']
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}
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},
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{
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name: 'n8n_autofix_workflow',
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description: `Automatically fix common workflow validation errors. Preview fixes or apply them. Fixes expression format, typeVersion, error output config, webhook paths.`,
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inputSchema: {
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type: 'object',
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properties: {
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id: {
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type: 'string',
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description: 'Workflow ID to fix'
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},
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applyFixes: {
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type: 'boolean',
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description: 'Apply fixes to workflow (default: false - preview mode)'
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},
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fixTypes: {
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type: 'array',
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description: 'Types of fixes to apply (default: all)',
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items: {
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type: 'string',
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enum: ['expression-format', 'typeversion-correction', 'error-output-config', 'node-type-correction', 'webhook-missing-path']
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}
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},
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confidenceThreshold: {
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type: 'string',
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enum: ['high', 'medium', 'low'],
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description: 'Minimum confidence level for fixes (default: medium)'
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},
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maxFixes: {
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type: 'number',
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description: 'Maximum number of fixes to apply (default: 50)'
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}
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},
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required: ['id']
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}
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},
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// Execution Management Tools
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{
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@@ -19,18 +19,25 @@ export interface SimilarityScore {
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}
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export interface CommonMistakePattern {
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pattern: RegExp | string;
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pattern: string;
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suggestion: string;
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confidence: number;
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reason: string;
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}
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export class NodeSimilarityService {
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// Constants to avoid magic numbers
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private static readonly SCORING_THRESHOLD = 50; // Minimum 50% confidence to suggest
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private static readonly TYPO_EDIT_DISTANCE = 2; // Max 2 character differences for typo detection
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private static readonly SHORT_SEARCH_LENGTH = 5; // Searches ≤5 chars need special handling
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private static readonly CACHE_DURATION_MS = 5 * 60 * 1000; // 5 minutes
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private static readonly AUTO_FIX_CONFIDENCE = 0.9; // 90% confidence for auto-fix
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private repository: NodeRepository;
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private commonMistakes: Map<string, CommonMistakePattern[]>;
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private nodeCache: any[] | null = null;
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private cacheExpiry: number = 0;
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private readonly CACHE_DURATION = 5 * 60 * 1000; // 5 minutes
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private cacheVersion: number = 0; // Track cache version for invalidation
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constructor(repository: NodeRepository) {
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this.repository = repository;
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@@ -39,53 +46,78 @@ export class NodeSimilarityService {
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/**
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* Initialize common mistake patterns
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* Using safer string-based patterns instead of complex regex to avoid ReDoS
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*/
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private initializeCommonMistakes(): Map<string, CommonMistakePattern[]> {
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const patterns = new Map<string, CommonMistakePattern[]>();
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// Case variations
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// Case variations - using exact string matching (case-insensitive)
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patterns.set('case_variations', [
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{ pattern: /^HttpRequest$/i, suggestion: 'nodes-base.httpRequest', confidence: 0.95, reason: 'Incorrect capitalization' },
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{ pattern: /^HTTPRequest$/i, suggestion: 'nodes-base.httpRequest', confidence: 0.95, reason: 'Common capitalization mistake' },
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{ pattern: /^Webhook$/i, suggestion: 'nodes-base.webhook', confidence: 0.95, reason: 'Incorrect capitalization' },
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{ pattern: /^WebHook$/i, suggestion: 'nodes-base.webhook', confidence: 0.95, reason: 'Common capitalization mistake' },
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{ pattern: /^Slack$/i, suggestion: 'nodes-base.slack', confidence: 0.9, reason: 'Missing package prefix' },
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{ pattern: /^Gmail$/i, suggestion: 'nodes-base.gmail', confidence: 0.9, reason: 'Missing package prefix' },
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{ pattern: /^GoogleSheets$/i, suggestion: 'nodes-base.googleSheets', confidence: 0.9, reason: 'Missing package prefix' },
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{ pattern: 'httprequest', suggestion: 'nodes-base.httpRequest', confidence: 0.95, reason: 'Incorrect capitalization' },
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{ pattern: 'webhook', suggestion: 'nodes-base.webhook', confidence: 0.95, reason: 'Incorrect capitalization' },
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{ pattern: 'slack', suggestion: 'nodes-base.slack', confidence: 0.9, reason: 'Missing package prefix' },
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{ pattern: 'gmail', suggestion: 'nodes-base.gmail', confidence: 0.9, reason: 'Missing package prefix' },
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{ pattern: 'googlesheets', suggestion: 'nodes-base.googleSheets', confidence: 0.9, reason: 'Missing package prefix' },
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{ pattern: 'telegram', suggestion: 'nodes-base.telegram', confidence: 0.9, reason: 'Missing package prefix' },
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]);
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// Missing prefixes
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patterns.set('missing_prefix', [
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{ pattern: /^(httpRequest|webhook|slack|gmail|googleSheets|telegram|discord|notion|airtable|postgres|mysql|mongodb)$/i,
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suggestion: '', confidence: 0.9, reason: 'Missing package prefix' },
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// Specific case variations that are common
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patterns.set('specific_variations', [
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{ pattern: 'HttpRequest', suggestion: 'nodes-base.httpRequest', confidence: 0.95, reason: 'Incorrect capitalization' },
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{ pattern: 'HTTPRequest', suggestion: 'nodes-base.httpRequest', confidence: 0.95, reason: 'Common capitalization mistake' },
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{ pattern: 'Webhook', suggestion: 'nodes-base.webhook', confidence: 0.95, reason: 'Incorrect capitalization' },
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{ pattern: 'WebHook', suggestion: 'nodes-base.webhook', confidence: 0.95, reason: 'Common capitalization mistake' },
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]);
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// Old versions or deprecated names
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patterns.set('deprecated', [
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{ pattern: /^n8n-nodes-base\./i, suggestion: '', confidence: 0.95, reason: 'Full package name used instead of short form' },
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{ pattern: /^@n8n\/n8n-nodes-langchain\./i, suggestion: '', confidence: 0.95, reason: 'Full package name used instead of short form' },
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// Deprecated package prefixes
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patterns.set('deprecated_prefixes', [
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{ pattern: 'n8n-nodes-base.', suggestion: 'nodes-base.', confidence: 0.95, reason: 'Full package name used instead of short form' },
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{ pattern: '@n8n/n8n-nodes-langchain.', suggestion: 'nodes-langchain.', confidence: 0.95, reason: 'Full package name used instead of short form' },
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]);
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// Common typos
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// Common typos - exact matches
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patterns.set('typos', [
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{ pattern: /^htpRequest$/i, suggestion: 'nodes-base.httpRequest', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: /^httpReqest$/i, suggestion: 'nodes-base.httpRequest', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: /^webook$/i, suggestion: 'nodes-base.webhook', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: /^slak$/i, suggestion: 'nodes-base.slack', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: /^goggleSheets$/i, suggestion: 'nodes-base.googleSheets', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: 'htprequest', suggestion: 'nodes-base.httpRequest', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: 'httpreqest', suggestion: 'nodes-base.httpRequest', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: 'webook', suggestion: 'nodes-base.webhook', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: 'slak', suggestion: 'nodes-base.slack', confidence: 0.8, reason: 'Likely typo' },
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{ pattern: 'googlesheets', suggestion: 'nodes-base.googleSheets', confidence: 0.8, reason: 'Likely typo' },
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]);
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// AI/LangChain specific
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patterns.set('ai_nodes', [
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{ pattern: /^openai$/i, suggestion: 'nodes-langchain.openAi', confidence: 0.85, reason: 'AI node - incorrect package' },
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{ pattern: /^nodes-base\.openai$/i, suggestion: 'nodes-langchain.openAi', confidence: 0.9, reason: 'Wrong package - OpenAI is in LangChain package' },
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{ pattern: /^chatOpenAI$/i, suggestion: 'nodes-langchain.lmChatOpenAi', confidence: 0.85, reason: 'LangChain node naming convention' },
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{ pattern: /^vectorStore$/i, suggestion: 'nodes-langchain.vectorStoreInMemory', confidence: 0.7, reason: 'Generic vector store reference' },
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{ pattern: 'openai', suggestion: 'nodes-langchain.openAi', confidence: 0.85, reason: 'AI node - incorrect package' },
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{ pattern: 'nodes-base.openai', suggestion: 'nodes-langchain.openAi', confidence: 0.9, reason: 'Wrong package - OpenAI is in LangChain package' },
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{ pattern: 'chatopenai', suggestion: 'nodes-langchain.lmChatOpenAi', confidence: 0.85, reason: 'LangChain node naming convention' },
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{ pattern: 'vectorstore', suggestion: 'nodes-langchain.vectorStoreInMemory', confidence: 0.7, reason: 'Generic vector store reference' },
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]);
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return patterns;
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}
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/**
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* Check if a type is a common node name without prefix
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*/
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private isCommonNodeWithoutPrefix(type: string): string | null {
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const commonNodes: Record<string, string> = {
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'httprequest': 'nodes-base.httpRequest',
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'webhook': 'nodes-base.webhook',
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'slack': 'nodes-base.slack',
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'gmail': 'nodes-base.gmail',
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'googlesheets': 'nodes-base.googleSheets',
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'telegram': 'nodes-base.telegram',
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'discord': 'nodes-base.discord',
|
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'notion': 'nodes-base.notion',
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'airtable': 'nodes-base.airtable',
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||||
'postgres': 'nodes-base.postgres',
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'mysql': 'nodes-base.mySql',
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'mongodb': 'nodes-base.mongoDb',
|
||||
};
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||||
|
||||
const normalized = type.toLowerCase();
|
||||
return commonNodes[normalized] || null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Find similar nodes for an invalid type
|
||||
*/
|
||||
@@ -120,7 +152,7 @@ export class NodeSimilarityService {
|
||||
continue;
|
||||
}
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||||
|
||||
if (score.totalScore >= 50) {
|
||||
if (score.totalScore >= NodeSimilarityService.SCORING_THRESHOLD) {
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||||
suggestions.push(this.createSuggestion(node, score));
|
||||
}
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||||
|
||||
@@ -133,34 +165,34 @@ export class NodeSimilarityService {
|
||||
}
|
||||
|
||||
/**
|
||||
* Check for common mistake patterns
|
||||
* Check for common mistake patterns (ReDoS-safe implementation)
|
||||
*/
|
||||
private checkCommonMistakes(invalidType: string): NodeSuggestion | null {
|
||||
const cleanType = invalidType.trim();
|
||||
const lowerType = cleanType.toLowerCase();
|
||||
|
||||
// Check each category of patterns
|
||||
// First check for common nodes without prefix
|
||||
const commonNodeSuggestion = this.isCommonNodeWithoutPrefix(cleanType);
|
||||
if (commonNodeSuggestion) {
|
||||
const node = this.repository.getNode(commonNodeSuggestion);
|
||||
if (node) {
|
||||
return {
|
||||
nodeType: commonNodeSuggestion,
|
||||
displayName: node.displayName,
|
||||
confidence: 0.9,
|
||||
reason: 'Missing package prefix',
|
||||
category: node.category,
|
||||
description: node.description
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
// Check deprecated prefixes (string-based, no regex)
|
||||
for (const [category, patterns] of this.commonMistakes) {
|
||||
if (category === 'deprecated_prefixes') {
|
||||
for (const pattern of patterns) {
|
||||
let match = false;
|
||||
let actualSuggestion = pattern.suggestion;
|
||||
|
||||
if (pattern.pattern instanceof RegExp) {
|
||||
match = pattern.pattern.test(cleanType);
|
||||
} else {
|
||||
match = cleanType === pattern.pattern;
|
||||
}
|
||||
|
||||
if (match) {
|
||||
// Handle dynamic suggestions (e.g., missing prefix)
|
||||
if (category === 'missing_prefix' && !actualSuggestion) {
|
||||
actualSuggestion = `nodes-base.${cleanType}`;
|
||||
} else if (category === 'deprecated' && !actualSuggestion) {
|
||||
// Remove package prefix
|
||||
actualSuggestion = cleanType.replace(/^n8n-nodes-base\./, 'nodes-base.')
|
||||
.replace(/^@n8n\/n8n-nodes-langchain\./, 'nodes-langchain.');
|
||||
}
|
||||
|
||||
// Verify the suggestion exists
|
||||
if (cleanType.startsWith(pattern.pattern)) {
|
||||
const actualSuggestion = cleanType.replace(pattern.pattern, pattern.suggestion);
|
||||
const node = this.repository.getNode(actualSuggestion);
|
||||
if (node) {
|
||||
return {
|
||||
@@ -175,6 +207,33 @@ export class NodeSimilarityService {
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Check exact matches for typos and variations
|
||||
for (const [category, patterns] of this.commonMistakes) {
|
||||
if (category === 'deprecated_prefixes') continue; // Already handled
|
||||
|
||||
for (const pattern of patterns) {
|
||||
// Simple string comparison (case-sensitive for specific_variations)
|
||||
const match = category === 'specific_variations'
|
||||
? cleanType === pattern.pattern
|
||||
: lowerType === pattern.pattern.toLowerCase();
|
||||
|
||||
if (match && pattern.suggestion) {
|
||||
const node = this.repository.getNode(pattern.suggestion);
|
||||
if (node) {
|
||||
return {
|
||||
nodeType: pattern.suggestion,
|
||||
displayName: node.displayName,
|
||||
confidence: pattern.confidence,
|
||||
reason: pattern.reason,
|
||||
category: node.category,
|
||||
description: node.description
|
||||
};
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
@@ -188,7 +247,7 @@ export class NodeSimilarityService {
|
||||
const displayNameClean = this.normalizeNodeType(node.displayName);
|
||||
|
||||
// Special handling for very short search terms (e.g., "http", "sheet")
|
||||
const isShortSearch = invalidType.length <= 5;
|
||||
const isShortSearch = invalidType.length <= NodeSimilarityService.SHORT_SEARCH_LENGTH;
|
||||
|
||||
// Name similarity (40% weight)
|
||||
let nameSimilarity = Math.max(
|
||||
@@ -227,10 +286,10 @@ export class NodeSimilarityService {
|
||||
// Boost score significantly for short searches that are exact substring matches
|
||||
// Short searches need more boost to reach the 50 threshold
|
||||
patternMatch = isShortSearch ? 45 : 25;
|
||||
} else if (this.getEditDistance(cleanInvalid, cleanValid) <= 2) {
|
||||
} else if (this.getEditDistance(cleanInvalid, cleanValid) <= NodeSimilarityService.TYPO_EDIT_DISTANCE) {
|
||||
// Small edit distance indicates likely typo
|
||||
patternMatch = 20;
|
||||
} else if (this.getEditDistance(cleanInvalid, displayNameClean) <= 2) {
|
||||
} else if (this.getEditDistance(cleanInvalid, displayNameClean) <= NodeSimilarityService.TYPO_EDIT_DISTANCE) {
|
||||
patternMatch = 18;
|
||||
}
|
||||
|
||||
@@ -301,41 +360,86 @@ export class NodeSimilarityService {
|
||||
}
|
||||
|
||||
/**
|
||||
* Calculate Levenshtein distance
|
||||
* Calculate Levenshtein distance with optimizations
|
||||
* - Early termination when difference exceeds threshold
|
||||
* - Space-optimized to use only two rows instead of full matrix
|
||||
* - Fast path for identical or vastly different strings
|
||||
*/
|
||||
private getEditDistance(s1: string, s2: string): number {
|
||||
private getEditDistance(s1: string, s2: string, maxDistance: number = 5): number {
|
||||
// Fast path: identical strings
|
||||
if (s1 === s2) return 0;
|
||||
|
||||
const m = s1.length;
|
||||
const n = s2.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;
|
||||
// Fast path: length difference exceeds threshold
|
||||
const lengthDiff = Math.abs(m - n);
|
||||
if (lengthDiff > maxDistance) return maxDistance + 1;
|
||||
|
||||
// Fast path: empty strings
|
||||
if (m === 0) return n;
|
||||
if (n === 0) return m;
|
||||
|
||||
// Space optimization: only need previous and current row
|
||||
let prev = Array(n + 1).fill(0).map((_, i) => i);
|
||||
|
||||
for (let i = 1; i <= m; i++) {
|
||||
const curr = [i];
|
||||
let minInRow = i;
|
||||
|
||||
for (let j = 1; j <= n; j++) {
|
||||
if (s1[i - 1] === s2[j - 1]) {
|
||||
dp[i][j] = dp[i - 1][j - 1];
|
||||
} else {
|
||||
dp[i][j] = 1 + Math.min(dp[i - 1][j], dp[i][j - 1], dp[i - 1][j - 1]);
|
||||
}
|
||||
}
|
||||
const cost = s1[i - 1] === s2[j - 1] ? 0 : 1;
|
||||
const val = Math.min(
|
||||
curr[j - 1] + 1, // deletion
|
||||
prev[j] + 1, // insertion
|
||||
prev[j - 1] + cost // substitution
|
||||
);
|
||||
curr.push(val);
|
||||
minInRow = Math.min(minInRow, val);
|
||||
}
|
||||
|
||||
return dp[m][n];
|
||||
// Early termination: if minimum in this row exceeds threshold
|
||||
if (minInRow > maxDistance) {
|
||||
return maxDistance + 1;
|
||||
}
|
||||
|
||||
prev = curr;
|
||||
}
|
||||
|
||||
return prev[n];
|
||||
}
|
||||
|
||||
/**
|
||||
* Get cached nodes or fetch from repository
|
||||
* Implements proper cache invalidation with version tracking
|
||||
*/
|
||||
private async getCachedNodes(): Promise<any[]> {
|
||||
const now = Date.now();
|
||||
|
||||
if (!this.nodeCache || now > this.cacheExpiry) {
|
||||
try {
|
||||
this.nodeCache = this.repository.getAllNodes();
|
||||
this.cacheExpiry = now + this.CACHE_DURATION;
|
||||
const newNodes = this.repository.getAllNodes();
|
||||
|
||||
// Only update cache if we got valid data
|
||||
if (newNodes && newNodes.length > 0) {
|
||||
this.nodeCache = newNodes;
|
||||
this.cacheExpiry = now + NodeSimilarityService.CACHE_DURATION_MS;
|
||||
this.cacheVersion++;
|
||||
logger.debug('Node cache refreshed', {
|
||||
count: newNodes.length,
|
||||
version: this.cacheVersion
|
||||
});
|
||||
} else if (this.nodeCache) {
|
||||
// Return stale cache if new fetch returned empty
|
||||
logger.warn('Node fetch returned empty, using stale cache');
|
||||
}
|
||||
} catch (error) {
|
||||
logger.error('Failed to fetch nodes for similarity service', error);
|
||||
// Return stale cache on error if available
|
||||
if (this.nodeCache) {
|
||||
logger.info('Using stale cache due to fetch error');
|
||||
return this.nodeCache;
|
||||
}
|
||||
return [];
|
||||
}
|
||||
}
|
||||
@@ -343,6 +447,24 @@ export class NodeSimilarityService {
|
||||
return this.nodeCache || [];
|
||||
}
|
||||
|
||||
/**
|
||||
* Invalidate the cache (e.g., after database updates)
|
||||
*/
|
||||
public invalidateCache(): void {
|
||||
this.nodeCache = null;
|
||||
this.cacheExpiry = 0;
|
||||
this.cacheVersion++;
|
||||
logger.debug('Node cache invalidated', { version: this.cacheVersion });
|
||||
}
|
||||
|
||||
/**
|
||||
* Clear and refresh cache immediately
|
||||
*/
|
||||
public async refreshCache(): Promise<void> {
|
||||
this.invalidateCache();
|
||||
await this.getCachedNodes();
|
||||
}
|
||||
|
||||
/**
|
||||
* Format suggestions into a user-friendly message
|
||||
*/
|
||||
@@ -377,14 +499,14 @@ export class NodeSimilarityService {
|
||||
* Check if a suggestion is high confidence for auto-fixing
|
||||
*/
|
||||
isAutoFixable(suggestion: NodeSuggestion): boolean {
|
||||
return suggestion.confidence >= 0.9;
|
||||
return suggestion.confidence >= NodeSimilarityService.AUTO_FIX_CONFIDENCE;
|
||||
}
|
||||
|
||||
/**
|
||||
* Clear the node cache (useful after database updates)
|
||||
* @deprecated Use invalidateCache() instead for proper version tracking
|
||||
*/
|
||||
clearCache(): void {
|
||||
this.nodeCache = null;
|
||||
this.cacheExpiry = 0;
|
||||
this.invalidateCache();
|
||||
}
|
||||
}
|
||||
@@ -5,6 +5,7 @@
|
||||
* Converts validation results into diff operations that can be applied to fix the workflow.
|
||||
*/
|
||||
|
||||
import crypto from 'crypto';
|
||||
import { WorkflowValidationResult } from './workflow-validator';
|
||||
import { ExpressionFormatIssue } from './expression-format-validator';
|
||||
import { NodeSimilarityService } from './node-similarity-service';
|
||||
@@ -23,9 +24,8 @@ export type FixType =
|
||||
| 'expression-format'
|
||||
| 'typeversion-correction'
|
||||
| 'error-output-config'
|
||||
| 'required-field'
|
||||
| 'enum-value'
|
||||
| 'node-type-correction';
|
||||
| 'node-type-correction'
|
||||
| 'webhook-missing-path';
|
||||
|
||||
export interface AutoFixConfig {
|
||||
applyFixes: boolean;
|
||||
@@ -60,6 +60,30 @@ export interface NodeFormatIssue extends ExpressionFormatIssue {
|
||||
nodeId: string;
|
||||
}
|
||||
|
||||
/**
|
||||
* Type guard to check if an issue has node information
|
||||
*/
|
||||
export function isNodeFormatIssue(issue: ExpressionFormatIssue): issue is NodeFormatIssue {
|
||||
return 'nodeName' in issue && 'nodeId' in issue &&
|
||||
typeof (issue as any).nodeName === 'string' &&
|
||||
typeof (issue as any).nodeId === 'string';
|
||||
}
|
||||
|
||||
/**
|
||||
* Error with suggestions for node type issues
|
||||
*/
|
||||
export interface NodeTypeError {
|
||||
type: 'error';
|
||||
nodeId?: string;
|
||||
nodeName?: string;
|
||||
message: string;
|
||||
suggestions?: Array<{
|
||||
nodeType: string;
|
||||
confidence: number;
|
||||
reason: string;
|
||||
}>;
|
||||
}
|
||||
|
||||
export class WorkflowAutoFixer {
|
||||
private readonly defaultConfig: AutoFixConfig = {
|
||||
applyFixes: false,
|
||||
@@ -114,6 +138,11 @@ export class WorkflowAutoFixer {
|
||||
this.processNodeTypeFixes(validationResult, nodeMap, operations, fixes);
|
||||
}
|
||||
|
||||
// Process webhook path fixes (HIGH confidence)
|
||||
if (!fullConfig.fixTypes || fullConfig.fixTypes.includes('webhook-missing-path')) {
|
||||
this.processWebhookPathFixes(validationResult, nodeMap, operations, fixes);
|
||||
}
|
||||
|
||||
// Filter by confidence threshold
|
||||
const filteredFixes = this.filterByConfidence(fixes, fullConfig.confidenceThreshold);
|
||||
const filteredOperations = this.filterOperationsByFixes(operations, filteredFixes, fixes);
|
||||
@@ -149,15 +178,17 @@ export class WorkflowAutoFixer {
|
||||
for (const issue of formatIssues) {
|
||||
// Process both errors and warnings for missing-prefix issues
|
||||
if (issue.issueType === 'missing-prefix') {
|
||||
// Check if the issue has node information
|
||||
const nodeIssue = issue as any;
|
||||
const nodeName = nodeIssue.nodeName;
|
||||
|
||||
if (!nodeName) {
|
||||
// Skip if we can't identify the node
|
||||
// Use type guard to ensure we have node information
|
||||
if (!isNodeFormatIssue(issue)) {
|
||||
logger.warn('Expression format issue missing node information', {
|
||||
fieldPath: issue.fieldPath,
|
||||
issueType: issue.issueType
|
||||
});
|
||||
continue;
|
||||
}
|
||||
|
||||
const nodeName = issue.nodeName;
|
||||
|
||||
if (!fixesByNode.has(nodeName)) {
|
||||
fixesByNode.set(nodeName, []);
|
||||
}
|
||||
@@ -304,15 +335,15 @@ export class WorkflowAutoFixer {
|
||||
}
|
||||
|
||||
for (const error of validationResult.errors) {
|
||||
// Look for unknown node type errors with suggestions
|
||||
if (error.message?.includes('Unknown node type:') && (error as any).suggestions) {
|
||||
const suggestions = (error as any).suggestions;
|
||||
// Type-safe check for unknown node type errors with suggestions
|
||||
const nodeError = error as NodeTypeError;
|
||||
|
||||
if (error.message?.includes('Unknown node type:') && nodeError.suggestions) {
|
||||
// Only auto-fix if we have a high-confidence suggestion (>= 0.9)
|
||||
const highConfidenceSuggestion = suggestions.find((s: any) => s.confidence >= 0.9);
|
||||
const highConfidenceSuggestion = nodeError.suggestions.find(s => s.confidence >= 0.9);
|
||||
|
||||
if (highConfidenceSuggestion && error.nodeId) {
|
||||
const node = nodeMap.get(error.nodeId) || nodeMap.get(error.nodeName || '');
|
||||
if (highConfidenceSuggestion && nodeError.nodeId) {
|
||||
const node = nodeMap.get(nodeError.nodeId) || nodeMap.get(nodeError.nodeName || '');
|
||||
|
||||
if (node) {
|
||||
fixes.push({
|
||||
@@ -339,47 +370,166 @@ export class WorkflowAutoFixer {
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Process webhook path fixes for webhook nodes missing path parameter
|
||||
*/
|
||||
private processWebhookPathFixes(
|
||||
validationResult: WorkflowValidationResult,
|
||||
nodeMap: Map<string, WorkflowNode>,
|
||||
operations: WorkflowDiffOperation[],
|
||||
fixes: FixOperation[]
|
||||
): void {
|
||||
for (const error of validationResult.errors) {
|
||||
// Check for webhook path required error
|
||||
if (error.message === 'Webhook path is required') {
|
||||
const nodeName = error.nodeName || error.nodeId;
|
||||
if (!nodeName) continue;
|
||||
|
||||
const node = nodeMap.get(nodeName);
|
||||
if (!node) continue;
|
||||
|
||||
// Only fix webhook nodes
|
||||
if (!node.type?.includes('webhook')) continue;
|
||||
|
||||
// Generate a unique UUID for both path and webhookId
|
||||
const webhookId = crypto.randomUUID();
|
||||
|
||||
// Check if we need to update typeVersion
|
||||
const currentTypeVersion = node.typeVersion || 1;
|
||||
const needsVersionUpdate = currentTypeVersion < 2.1;
|
||||
|
||||
fixes.push({
|
||||
node: nodeName,
|
||||
field: 'path',
|
||||
type: 'webhook-missing-path',
|
||||
before: undefined,
|
||||
after: webhookId,
|
||||
confidence: 'high',
|
||||
description: needsVersionUpdate
|
||||
? `Generated webhook path and ID: ${webhookId} (also updating typeVersion to 2.1)`
|
||||
: `Generated webhook path and ID: ${webhookId}`
|
||||
});
|
||||
|
||||
// Create update operation with both path and webhookId
|
||||
// The updates object uses dot notation for nested properties
|
||||
const updates: Record<string, any> = {
|
||||
'parameters.path': webhookId,
|
||||
'webhookId': webhookId
|
||||
};
|
||||
|
||||
// Only update typeVersion if it's older than 2.1
|
||||
if (needsVersionUpdate) {
|
||||
updates['typeVersion'] = 2.1;
|
||||
}
|
||||
|
||||
const operation: UpdateNodeOperation = {
|
||||
type: 'updateNode',
|
||||
nodeId: nodeName,
|
||||
updates
|
||||
};
|
||||
operations.push(operation);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Set a nested value in an object using a path array
|
||||
* Includes validation to prevent silent failures
|
||||
*/
|
||||
private setNestedValue(obj: any, path: string[], value: any): void {
|
||||
if (path.length === 0) return;
|
||||
if (!obj || typeof obj !== 'object') {
|
||||
throw new Error('Cannot set value on non-object');
|
||||
}
|
||||
|
||||
if (path.length === 0) {
|
||||
throw new Error('Cannot set value with empty path');
|
||||
}
|
||||
|
||||
try {
|
||||
let current = obj;
|
||||
|
||||
for (let i = 0; i < path.length - 1; i++) {
|
||||
const key = path[i];
|
||||
|
||||
// Handle array indices
|
||||
if (key.includes('[')) {
|
||||
const [arrayKey, indexStr] = key.split('[');
|
||||
const index = parseInt(indexStr.replace(']', ''));
|
||||
const matches = key.match(/^([^[]+)\[(\d+)\]$/);
|
||||
if (!matches) {
|
||||
throw new Error(`Invalid array notation: ${key}`);
|
||||
}
|
||||
|
||||
const [, arrayKey, indexStr] = matches;
|
||||
const index = parseInt(indexStr, 10);
|
||||
|
||||
if (isNaN(index) || index < 0) {
|
||||
throw new Error(`Invalid array index: ${indexStr}`);
|
||||
}
|
||||
|
||||
if (!current[arrayKey]) {
|
||||
current[arrayKey] = [];
|
||||
}
|
||||
if (!current[arrayKey][index]) {
|
||||
current[arrayKey][index] = {};
|
||||
|
||||
if (!Array.isArray(current[arrayKey])) {
|
||||
throw new Error(`Expected array at ${arrayKey}, got ${typeof current[arrayKey]}`);
|
||||
}
|
||||
|
||||
while (current[arrayKey].length <= index) {
|
||||
current[arrayKey].push({});
|
||||
}
|
||||
|
||||
current = current[arrayKey][index];
|
||||
} else {
|
||||
if (!current[key]) {
|
||||
if (current[key] === null || current[key] === undefined) {
|
||||
current[key] = {};
|
||||
}
|
||||
|
||||
if (typeof current[key] !== 'object' || Array.isArray(current[key])) {
|
||||
throw new Error(`Cannot traverse through ${typeof current[key]} at ${key}`);
|
||||
}
|
||||
|
||||
current = current[key];
|
||||
}
|
||||
}
|
||||
|
||||
// Set the final value
|
||||
const lastKey = path[path.length - 1];
|
||||
|
||||
if (lastKey.includes('[')) {
|
||||
const [arrayKey, indexStr] = lastKey.split('[');
|
||||
const index = parseInt(indexStr.replace(']', ''));
|
||||
const matches = lastKey.match(/^([^[]+)\[(\d+)\]$/);
|
||||
if (!matches) {
|
||||
throw new Error(`Invalid array notation: ${lastKey}`);
|
||||
}
|
||||
|
||||
const [, arrayKey, indexStr] = matches;
|
||||
const index = parseInt(indexStr, 10);
|
||||
|
||||
if (isNaN(index) || index < 0) {
|
||||
throw new Error(`Invalid array index: ${indexStr}`);
|
||||
}
|
||||
|
||||
if (!current[arrayKey]) {
|
||||
current[arrayKey] = [];
|
||||
}
|
||||
|
||||
if (!Array.isArray(current[arrayKey])) {
|
||||
throw new Error(`Expected array at ${arrayKey}, got ${typeof current[arrayKey]}`);
|
||||
}
|
||||
|
||||
while (current[arrayKey].length <= index) {
|
||||
current[arrayKey].push(null);
|
||||
}
|
||||
|
||||
current[arrayKey][index] = value;
|
||||
} else {
|
||||
current[lastKey] = value;
|
||||
}
|
||||
} catch (error) {
|
||||
logger.error('Failed to set nested value', {
|
||||
path: path.join('.'),
|
||||
error: error instanceof Error ? error.message : String(error)
|
||||
});
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
@@ -427,9 +577,8 @@ export class WorkflowAutoFixer {
|
||||
'expression-format': 0,
|
||||
'typeversion-correction': 0,
|
||||
'error-output-config': 0,
|
||||
'required-field': 0,
|
||||
'enum-value': 0,
|
||||
'node-type-correction': 0
|
||||
'node-type-correction': 0,
|
||||
'webhook-missing-path': 0
|
||||
},
|
||||
byConfidence: {
|
||||
'high': 0,
|
||||
@@ -465,11 +614,11 @@ export class WorkflowAutoFixer {
|
||||
if (stats.byType['error-output-config'] > 0) {
|
||||
parts.push(`${stats.byType['error-output-config']} error output ${stats.byType['error-output-config'] === 1 ? 'configuration' : 'configurations'}`);
|
||||
}
|
||||
if (stats.byType['required-field'] > 0) {
|
||||
parts.push(`${stats.byType['required-field']} required ${stats.byType['required-field'] === 1 ? 'field' : 'fields'}`);
|
||||
if (stats.byType['node-type-correction'] > 0) {
|
||||
parts.push(`${stats.byType['node-type-correction']} node type ${stats.byType['node-type-correction'] === 1 ? 'correction' : 'corrections'}`);
|
||||
}
|
||||
if (stats.byType['enum-value'] > 0) {
|
||||
parts.push(`${stats.byType['enum-value']} invalid ${stats.byType['enum-value'] === 1 ? 'value' : 'values'}`);
|
||||
if (stats.byType['webhook-missing-path'] > 0) {
|
||||
parts.push(`${stats.byType['webhook-missing-path']} webhook ${stats.byType['webhook-missing-path'] === 1 ? 'path' : 'paths'}`);
|
||||
}
|
||||
|
||||
if (parts.length === 0) {
|
||||
|
||||
143
src/utils/node-type-utils.ts
Normal file
143
src/utils/node-type-utils.ts
Normal file
@@ -0,0 +1,143 @@
|
||||
/**
|
||||
* Utility functions for working with n8n node types
|
||||
* Provides consistent normalization and transformation of node type strings
|
||||
*/
|
||||
|
||||
/**
|
||||
* Normalize a node type to the standard short form
|
||||
* Handles both old-style (n8n-nodes-base.) and new-style (nodes-base.) prefixes
|
||||
*
|
||||
* @example
|
||||
* normalizeNodeType('n8n-nodes-base.httpRequest') // 'nodes-base.httpRequest'
|
||||
* normalizeNodeType('@n8n/n8n-nodes-langchain.openAi') // 'nodes-langchain.openAi'
|
||||
* normalizeNodeType('nodes-base.webhook') // 'nodes-base.webhook' (unchanged)
|
||||
*/
|
||||
export function normalizeNodeType(type: string): string {
|
||||
if (!type) return type;
|
||||
|
||||
return type
|
||||
.replace(/^n8n-nodes-base\./, 'nodes-base.')
|
||||
.replace(/^@n8n\/n8n-nodes-langchain\./, 'nodes-langchain.');
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a short-form node type to the full package name
|
||||
*
|
||||
* @example
|
||||
* denormalizeNodeType('nodes-base.httpRequest', 'base') // 'n8n-nodes-base.httpRequest'
|
||||
* denormalizeNodeType('nodes-langchain.openAi', 'langchain') // '@n8n/n8n-nodes-langchain.openAi'
|
||||
*/
|
||||
export function denormalizeNodeType(type: string, packageType: 'base' | 'langchain'): string {
|
||||
if (!type) return type;
|
||||
|
||||
if (packageType === 'base') {
|
||||
return type.replace(/^nodes-base\./, 'n8n-nodes-base.');
|
||||
}
|
||||
|
||||
return type.replace(/^nodes-langchain\./, '@n8n/n8n-nodes-langchain.');
|
||||
}
|
||||
|
||||
/**
|
||||
* Extract the node name from a full node type
|
||||
*
|
||||
* @example
|
||||
* extractNodeName('nodes-base.httpRequest') // 'httpRequest'
|
||||
* extractNodeName('n8n-nodes-base.webhook') // 'webhook'
|
||||
*/
|
||||
export function extractNodeName(type: string): string {
|
||||
if (!type) return '';
|
||||
|
||||
// First normalize the type
|
||||
const normalized = normalizeNodeType(type);
|
||||
|
||||
// Extract everything after the last dot
|
||||
const parts = normalized.split('.');
|
||||
return parts[parts.length - 1] || '';
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the package prefix from a node type
|
||||
*
|
||||
* @example
|
||||
* getNodePackage('nodes-base.httpRequest') // 'nodes-base'
|
||||
* getNodePackage('nodes-langchain.openAi') // 'nodes-langchain'
|
||||
*/
|
||||
export function getNodePackage(type: string): string | null {
|
||||
if (!type || !type.includes('.')) return null;
|
||||
|
||||
// First normalize the type
|
||||
const normalized = normalizeNodeType(type);
|
||||
|
||||
// Extract everything before the first dot
|
||||
const parts = normalized.split('.');
|
||||
return parts[0] || null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if a node type is from the base package
|
||||
*/
|
||||
export function isBaseNode(type: string): boolean {
|
||||
const normalized = normalizeNodeType(type);
|
||||
return normalized.startsWith('nodes-base.');
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if a node type is from the langchain package
|
||||
*/
|
||||
export function isLangChainNode(type: string): boolean {
|
||||
const normalized = normalizeNodeType(type);
|
||||
return normalized.startsWith('nodes-langchain.');
|
||||
}
|
||||
|
||||
/**
|
||||
* Validate if a string looks like a valid node type
|
||||
* (has package prefix and node name)
|
||||
*/
|
||||
export function isValidNodeTypeFormat(type: string): boolean {
|
||||
if (!type || typeof type !== 'string') return false;
|
||||
|
||||
// Must contain at least one dot
|
||||
if (!type.includes('.')) return false;
|
||||
|
||||
const parts = type.split('.');
|
||||
|
||||
// Must have exactly 2 parts (package and node name)
|
||||
if (parts.length !== 2) return false;
|
||||
|
||||
// Both parts must be non-empty
|
||||
return parts[0].length > 0 && parts[1].length > 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Try multiple variations of a node type to find a match
|
||||
* Returns an array of variations to try in order
|
||||
*
|
||||
* @example
|
||||
* getNodeTypeVariations('httpRequest')
|
||||
* // ['nodes-base.httpRequest', 'n8n-nodes-base.httpRequest', 'nodes-langchain.httpRequest', ...]
|
||||
*/
|
||||
export function getNodeTypeVariations(type: string): string[] {
|
||||
const variations: string[] = [];
|
||||
|
||||
// If it already has a package prefix, try normalized version first
|
||||
if (type.includes('.')) {
|
||||
variations.push(normalizeNodeType(type));
|
||||
|
||||
// Also try the denormalized versions
|
||||
const normalized = normalizeNodeType(type);
|
||||
if (normalized.startsWith('nodes-base.')) {
|
||||
variations.push(denormalizeNodeType(normalized, 'base'));
|
||||
} else if (normalized.startsWith('nodes-langchain.')) {
|
||||
variations.push(denormalizeNodeType(normalized, 'langchain'));
|
||||
}
|
||||
} else {
|
||||
// No package prefix, try common packages
|
||||
variations.push(`nodes-base.${type}`);
|
||||
variations.push(`n8n-nodes-base.${type}`);
|
||||
variations.push(`nodes-langchain.${type}`);
|
||||
variations.push(`@n8n/n8n-nodes-langchain.${type}`);
|
||||
}
|
||||
|
||||
// Remove duplicates while preserving order
|
||||
return [...new Set(variations)];
|
||||
}
|
||||
Reference in New Issue
Block a user