mirror of
https://github.com/czlonkowski/n8n-mcp.git
synced 2026-02-09 06:43:08 +00:00
feat: implement comprehensive expression format validation system
- Add universal expression validator with 100% reliable detection - Implement confidence-based scoring for node-specific recommendations - Add resource locator format detection and validation - Fix pattern matching precision (exact/prefix instead of includes) - Add recursion depth protection (MAX_RECURSION_DEPTH = 100) - Validate resource locator modes (id, url, expression, name, list) - Separate universal rules from node-specific intelligence - Add comprehensive test coverage (94%+ statements) - Prevent common AI agent mistakes with expressions Addresses code review feedback with critical fixes and enhancements. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
czlonkowski
211
src/services/confidence-scorer.ts
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211
src/services/confidence-scorer.ts
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@@ -0,0 +1,211 @@
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/**
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* Confidence Scorer for node-specific validations
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*
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* Provides confidence scores for node-specific recommendations,
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* allowing users to understand the reliability of suggestions.
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*/
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export interface ConfidenceScore {
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value: number; // 0.0 to 1.0
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reason: string;
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factors: ConfidenceFactor[];
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}
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export interface ConfidenceFactor {
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name: string;
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weight: number;
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matched: boolean;
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description: string;
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}
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export class ConfidenceScorer {
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/**
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* Calculate confidence score for resource locator recommendation
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*/
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static scoreResourceLocatorRecommendation(
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fieldName: string,
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nodeType: string,
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value: string
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): ConfidenceScore {
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const factors: ConfidenceFactor[] = [];
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let totalWeight = 0;
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let matchedWeight = 0;
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// Factor 1: Exact field name match (highest confidence)
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const exactFieldMatch = this.checkExactFieldMatch(fieldName, nodeType);
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factors.push({
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name: 'exact-field-match',
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weight: 0.5,
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matched: exactFieldMatch,
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description: `Field name '${fieldName}' is known to use resource locator in ${nodeType}`
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});
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// Factor 2: Field name pattern (medium confidence)
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const patternMatch = this.checkFieldPattern(fieldName);
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factors.push({
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name: 'field-pattern',
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weight: 0.3,
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matched: patternMatch,
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description: `Field name '${fieldName}' matches common resource locator patterns`
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});
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// Factor 3: Value pattern (low confidence)
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const valuePattern = this.checkValuePattern(value);
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factors.push({
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name: 'value-pattern',
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weight: 0.1,
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matched: valuePattern,
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description: 'Value contains patterns typical of resource identifiers'
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});
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// Factor 4: Node type category (medium confidence)
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const nodeCategory = this.checkNodeCategory(nodeType);
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factors.push({
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name: 'node-category',
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weight: 0.1,
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matched: nodeCategory,
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description: `Node type '${nodeType}' typically uses resource locators`
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});
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// Calculate final score
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for (const factor of factors) {
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totalWeight += factor.weight;
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if (factor.matched) {
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matchedWeight += factor.weight;
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}
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}
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const score = totalWeight > 0 ? matchedWeight / totalWeight : 0;
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// Determine reason based on score
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let reason: string;
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if (score >= 0.8) {
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reason = 'High confidence: Multiple strong indicators suggest resource locator format';
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} else if (score >= 0.5) {
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reason = 'Medium confidence: Some indicators suggest resource locator format';
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} else if (score >= 0.3) {
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reason = 'Low confidence: Weak indicators for resource locator format';
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} else {
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reason = 'Very low confidence: Minimal evidence for resource locator format';
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}
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return {
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value: score,
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reason,
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factors
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};
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}
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/**
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* Known field mappings with exact matches
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*/
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private static readonly EXACT_FIELD_MAPPINGS: Record<string, string[]> = {
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'github': ['owner', 'repository', 'user', 'organization'],
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'googlesheets': ['sheetId', 'documentId', 'spreadsheetId'],
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'googledrive': ['fileId', 'folderId', 'driveId'],
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'slack': ['channel', 'user', 'channelId', 'userId'],
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'notion': ['databaseId', 'pageId', 'blockId'],
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'airtable': ['baseId', 'tableId', 'viewId']
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};
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private static checkExactFieldMatch(fieldName: string, nodeType: string): boolean {
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const nodeBase = nodeType.split('.').pop()?.toLowerCase() || '';
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for (const [pattern, fields] of Object.entries(this.EXACT_FIELD_MAPPINGS)) {
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if (nodeBase === pattern || nodeBase.startsWith(`${pattern}-`)) {
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return fields.includes(fieldName);
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}
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}
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return false;
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}
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/**
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* Common patterns in field names that suggest resource locators
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*/
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private static readonly FIELD_PATTERNS = [
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/^.*Id$/i, // ends with Id
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/^.*Ids$/i, // ends with Ids
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/^.*Key$/i, // ends with Key
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/^.*Name$/i, // ends with Name
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/^.*Path$/i, // ends with Path
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/^.*Url$/i, // ends with Url
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/^.*Uri$/i, // ends with Uri
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/^(table|database|collection|bucket|folder|file|document|sheet|board|project|issue|user|channel|team|organization|repository|owner)$/i
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];
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private static checkFieldPattern(fieldName: string): boolean {
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return this.FIELD_PATTERNS.some(pattern => pattern.test(fieldName));
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}
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/**
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* Check if the value looks like it contains identifiers
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*/
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private static checkValuePattern(value: string): boolean {
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// Remove = prefix if present for analysis
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const content = value.startsWith('=') ? value.substring(1) : value;
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// Skip if not an expression
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if (!content.includes('{{') || !content.includes('}}')) {
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return false;
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}
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// Check for patterns that suggest IDs or resource references
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const patterns = [
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/\{\{.*\.(id|Id|ID|key|Key|name|Name|path|Path|url|Url|uri|Uri).*\}\}/i,
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/\{\{.*_(id|Id|ID|key|Key|name|Name|path|Path|url|Url|uri|Uri).*\}\}/i,
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/\{\{.*(id|Id|ID|key|Key|name|Name|path|Path|url|Url|uri|Uri).*\}\}/i
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];
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return patterns.some(pattern => pattern.test(content));
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}
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/**
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* Node categories that commonly use resource locators
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*/
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private static readonly RESOURCE_HEAVY_NODES = [
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'github', 'gitlab', 'bitbucket', // Version control
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'googlesheets', 'googledrive', 'dropbox', // Cloud storage
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'slack', 'discord', 'telegram', // Communication
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'notion', 'airtable', 'baserow', // Databases
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'jira', 'asana', 'trello', 'monday', // Project management
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'salesforce', 'hubspot', 'pipedrive', // CRM
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'stripe', 'paypal', 'square', // Payment
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'aws', 'gcp', 'azure', // Cloud providers
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'mysql', 'postgres', 'mongodb', 'redis' // Databases
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];
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private static checkNodeCategory(nodeType: string): boolean {
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const nodeBase = nodeType.split('.').pop()?.toLowerCase() || '';
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return this.RESOURCE_HEAVY_NODES.some(category =>
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nodeBase.includes(category)
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);
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}
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/**
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* Get confidence level as a string
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*/
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static getConfidenceLevel(score: number): 'high' | 'medium' | 'low' | 'very-low' {
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if (score >= 0.8) return 'high';
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if (score >= 0.5) return 'medium';
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if (score >= 0.3) return 'low';
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return 'very-low';
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}
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/**
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* Should apply recommendation based on confidence and threshold
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*/
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static shouldApplyRecommendation(
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score: number,
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threshold: 'strict' | 'normal' | 'relaxed' = 'normal'
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): boolean {
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const thresholds = {
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strict: 0.8, // Only apply high confidence recommendations
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normal: 0.5, // Apply medium and high confidence
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relaxed: 0.3 // Apply low, medium, and high confidence
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};
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return score >= thresholds[threshold];
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}
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}
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340
src/services/expression-format-validator.ts
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340
src/services/expression-format-validator.ts
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@@ -0,0 +1,340 @@
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/**
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* Expression Format Validator for n8n expressions
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*
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* Combines universal expression validation with node-specific intelligence
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* to provide comprehensive expression format validation. Uses the
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* UniversalExpressionValidator for 100% reliable base validation and adds
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* node-specific resource locator detection on top.
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*/
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import { UniversalExpressionValidator, UniversalValidationResult } from './universal-expression-validator';
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import { ConfidenceScorer } from './confidence-scorer';
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export interface ExpressionFormatIssue {
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fieldPath: string;
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currentValue: any;
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correctedValue: any;
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issueType: 'missing-prefix' | 'needs-resource-locator' | 'invalid-rl-structure' | 'mixed-format';
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explanation: string;
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severity: 'error' | 'warning';
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confidence?: number; // 0.0 to 1.0, only for node-specific recommendations
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}
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export interface ResourceLocatorField {
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__rl: true;
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value: string;
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mode: string;
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}
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export interface ValidationContext {
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nodeType: string;
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nodeName: string;
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nodeId?: string;
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}
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export class ExpressionFormatValidator {
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private static readonly VALID_RL_MODES = ['id', 'url', 'expression', 'name', 'list'] as const;
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private static readonly MAX_RECURSION_DEPTH = 100;
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private static readonly EXPRESSION_PREFIX = '='; // Keep for resource locator generation
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/**
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* Known fields that commonly use resource locator format
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* Map of node type patterns to field names
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*/
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private static readonly RESOURCE_LOCATOR_FIELDS: Record<string, string[]> = {
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'github': ['owner', 'repository', 'user', 'organization'],
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'googleSheets': ['sheetId', 'documentId', 'spreadsheetId', 'rangeDefinition'],
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'googleDrive': ['fileId', 'folderId', 'driveId'],
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'slack': ['channel', 'user', 'channelId', 'userId', 'teamId'],
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'notion': ['databaseId', 'pageId', 'blockId'],
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'airtable': ['baseId', 'tableId', 'viewId'],
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'monday': ['boardId', 'itemId', 'groupId'],
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'hubspot': ['contactId', 'companyId', 'dealId'],
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'salesforce': ['recordId', 'objectName'],
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'jira': ['projectKey', 'issueKey', 'boardId'],
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'gitlab': ['projectId', 'mergeRequestId', 'issueId'],
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'mysql': ['table', 'database', 'schema'],
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'postgres': ['table', 'database', 'schema'],
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'mongodb': ['collection', 'database'],
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's3': ['bucketName', 'key', 'fileName'],
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'ftp': ['path', 'fileName'],
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'ssh': ['path', 'fileName'],
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'redis': ['key'],
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};
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/**
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* Determine if a field should use resource locator format based on node type and field name
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*/
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private static shouldUseResourceLocator(fieldName: string, nodeType: string): boolean {
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// Extract the base node type (e.g., 'github' from 'n8n-nodes-base.github')
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const nodeBase = nodeType.split('.').pop()?.toLowerCase() || '';
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// Check if this node type has resource locator fields
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for (const [pattern, fields] of Object.entries(this.RESOURCE_LOCATOR_FIELDS)) {
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// Use exact match or prefix matching for precision
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// This prevents false positives like 'postgresqlAdvanced' matching 'postgres'
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if ((nodeBase === pattern || nodeBase.startsWith(`${pattern}-`)) && fields.includes(fieldName)) {
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return true;
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}
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}
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// Don't apply resource locator to generic fields
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return false;
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}
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/**
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* Check if a value is a valid resource locator object
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*/
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private static isResourceLocator(value: any): value is ResourceLocatorField {
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if (typeof value !== 'object' || value === null || value.__rl !== true) {
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return false;
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}
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if (!('value' in value) || !('mode' in value)) {
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return false;
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}
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// Validate mode is one of the allowed values
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if (typeof value.mode !== 'string' || !this.VALID_RL_MODES.includes(value.mode as any)) {
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return false;
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}
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return true;
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}
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/**
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* Generate the corrected value for an expression
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*/
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private static generateCorrection(
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value: string,
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needsResourceLocator: boolean
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): any {
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const correctedValue = value.startsWith(this.EXPRESSION_PREFIX)
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? value
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: `${this.EXPRESSION_PREFIX}${value}`;
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if (needsResourceLocator) {
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return {
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__rl: true,
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value: correctedValue,
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mode: 'expression'
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};
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}
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return correctedValue;
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}
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/**
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* Validate and fix expression format for a single value
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*/
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static validateAndFix(
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value: any,
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fieldPath: string,
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context: ValidationContext
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): ExpressionFormatIssue | null {
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// Skip non-string values unless they're resource locators
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if (typeof value !== 'string' && !this.isResourceLocator(value)) {
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return null;
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}
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// Handle resource locator objects
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if (this.isResourceLocator(value)) {
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// Use universal validator for the value inside RL
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const universalResults = UniversalExpressionValidator.validate(value.value);
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const invalidResult = universalResults.find(r => !r.isValid && r.needsPrefix);
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if (invalidResult) {
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return {
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fieldPath,
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currentValue: value,
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correctedValue: {
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...value,
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value: UniversalExpressionValidator.getCorrectedValue(value.value)
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},
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issueType: 'missing-prefix',
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explanation: `Resource locator value: ${invalidResult.explanation}`,
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severity: 'error'
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};
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}
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return null;
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}
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// First, use universal validator for 100% reliable validation
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const universalResults = UniversalExpressionValidator.validate(value);
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const invalidResults = universalResults.filter(r => !r.isValid);
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// If universal validator found issues, report them
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if (invalidResults.length > 0) {
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// Prioritize prefix issues
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const prefixIssue = invalidResults.find(r => r.needsPrefix);
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if (prefixIssue) {
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// Check if this field should use resource locator format with confidence scoring
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const fieldName = fieldPath.split('.').pop() || '';
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const confidenceScore = ConfidenceScorer.scoreResourceLocatorRecommendation(
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fieldName,
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context.nodeType,
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value
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);
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// Only suggest resource locator for high confidence matches when there's a prefix issue
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if (confidenceScore.value >= 0.8) {
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return {
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fieldPath,
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currentValue: value,
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correctedValue: this.generateCorrection(value, true),
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issueType: 'needs-resource-locator',
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explanation: `Field '${fieldName}' contains expression but needs resource locator format with '${this.EXPRESSION_PREFIX}' prefix for evaluation.`,
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severity: 'error',
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confidence: confidenceScore.value
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};
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} else {
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return {
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fieldPath,
|
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currentValue: value,
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correctedValue: UniversalExpressionValidator.getCorrectedValue(value),
|
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issueType: 'missing-prefix',
|
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explanation: prefixIssue.explanation,
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||||
severity: 'error'
|
||||
};
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||||
}
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||||
}
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||||
|
||||
// Report other validation issues
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const firstIssue = invalidResults[0];
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||||
return {
|
||||
fieldPath,
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||||
currentValue: value,
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||||
correctedValue: value,
|
||||
issueType: 'mixed-format',
|
||||
explanation: firstIssue.explanation,
|
||||
severity: 'error'
|
||||
};
|
||||
}
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||||
|
||||
// Universal validation passed, now check for node-specific improvements
|
||||
// Only if the value has expressions
|
||||
const hasExpression = universalResults.some(r => r.hasExpression);
|
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if (hasExpression && typeof value === 'string') {
|
||||
const fieldName = fieldPath.split('.').pop() || '';
|
||||
const confidenceScore = ConfidenceScorer.scoreResourceLocatorRecommendation(
|
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fieldName,
|
||||
context.nodeType,
|
||||
value
|
||||
);
|
||||
|
||||
// Only suggest resource locator for medium-high confidence as a warning
|
||||
if (confidenceScore.value >= 0.5) {
|
||||
// Has prefix but should use resource locator format
|
||||
return {
|
||||
fieldPath,
|
||||
currentValue: value,
|
||||
correctedValue: this.generateCorrection(value, true),
|
||||
issueType: 'needs-resource-locator',
|
||||
explanation: `Field '${fieldName}' should use resource locator format for better compatibility. (Confidence: ${Math.round(confidenceScore.value * 100)}%)`,
|
||||
severity: 'warning',
|
||||
confidence: confidenceScore.value
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Validate all expressions in a node's parameters recursively
|
||||
*/
|
||||
static validateNodeParameters(
|
||||
parameters: any,
|
||||
context: ValidationContext
|
||||
): ExpressionFormatIssue[] {
|
||||
const issues: ExpressionFormatIssue[] = [];
|
||||
const visited = new WeakSet();
|
||||
|
||||
this.validateRecursive(parameters, '', context, issues, visited);
|
||||
|
||||
return issues;
|
||||
}
|
||||
|
||||
/**
|
||||
* Recursively validate parameters for expression format issues
|
||||
*/
|
||||
private static validateRecursive(
|
||||
obj: any,
|
||||
path: string,
|
||||
context: ValidationContext,
|
||||
issues: ExpressionFormatIssue[],
|
||||
visited: WeakSet<object>,
|
||||
depth = 0
|
||||
): void {
|
||||
// Prevent excessive recursion
|
||||
if (depth > this.MAX_RECURSION_DEPTH) {
|
||||
issues.push({
|
||||
fieldPath: path,
|
||||
currentValue: obj,
|
||||
correctedValue: obj,
|
||||
issueType: 'mixed-format',
|
||||
explanation: `Maximum recursion depth (${this.MAX_RECURSION_DEPTH}) exceeded. Object may have circular references or be too deeply nested.`,
|
||||
severity: 'warning'
|
||||
});
|
||||
return;
|
||||
}
|
||||
|
||||
// Handle circular references
|
||||
if (obj && typeof obj === 'object') {
|
||||
if (visited.has(obj)) return;
|
||||
visited.add(obj);
|
||||
}
|
||||
|
||||
// Check current value
|
||||
const issue = this.validateAndFix(obj, path, context);
|
||||
if (issue) {
|
||||
issues.push(issue);
|
||||
}
|
||||
|
||||
// Recurse into objects and arrays
|
||||
if (Array.isArray(obj)) {
|
||||
obj.forEach((item, index) => {
|
||||
const newPath = path ? `${path}[${index}]` : `[${index}]`;
|
||||
this.validateRecursive(item, newPath, context, issues, visited, depth + 1);
|
||||
});
|
||||
} else if (obj && typeof obj === 'object') {
|
||||
// Skip resource locator internals if already validated
|
||||
if (this.isResourceLocator(obj)) {
|
||||
return;
|
||||
}
|
||||
|
||||
Object.entries(obj).forEach(([key, value]) => {
|
||||
// Skip special keys
|
||||
if (key.startsWith('__')) return;
|
||||
|
||||
const newPath = path ? `${path}.${key}` : key;
|
||||
this.validateRecursive(value, newPath, context, issues, visited, depth + 1);
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate a detailed error message with examples
|
||||
*/
|
||||
static formatErrorMessage(issue: ExpressionFormatIssue, context: ValidationContext): string {
|
||||
let message = `Expression format ${issue.severity} in node '${context.nodeName}':\n`;
|
||||
message += `Field '${issue.fieldPath}' ${issue.explanation}\n\n`;
|
||||
|
||||
message += `Current (incorrect):\n`;
|
||||
if (typeof issue.currentValue === 'string') {
|
||||
message += `"${issue.fieldPath}": "${issue.currentValue}"\n\n`;
|
||||
} else {
|
||||
message += `"${issue.fieldPath}": ${JSON.stringify(issue.currentValue, null, 2)}\n\n`;
|
||||
}
|
||||
|
||||
message += `Fixed (correct):\n`;
|
||||
if (typeof issue.correctedValue === 'string') {
|
||||
message += `"${issue.fieldPath}": "${issue.correctedValue}"`;
|
||||
} else {
|
||||
message += `"${issue.fieldPath}": ${JSON.stringify(issue.correctedValue, null, 2)}`;
|
||||
}
|
||||
|
||||
return message;
|
||||
}
|
||||
}
|
||||
272
src/services/universal-expression-validator.ts
Normal file
272
src/services/universal-expression-validator.ts
Normal file
@@ -0,0 +1,272 @@
|
||||
/**
|
||||
* Universal Expression Validator
|
||||
*
|
||||
* Validates n8n expressions based on universal rules that apply to ALL expressions,
|
||||
* regardless of node type or field. This provides 100% reliable detection of
|
||||
* expression format issues without needing node-specific knowledge.
|
||||
*/
|
||||
|
||||
export interface UniversalValidationResult {
|
||||
isValid: boolean;
|
||||
hasExpression: boolean;
|
||||
needsPrefix: boolean;
|
||||
isMixedContent: boolean;
|
||||
confidence: 1.0; // Universal rules have 100% confidence
|
||||
suggestion?: string;
|
||||
explanation: string;
|
||||
}
|
||||
|
||||
export class UniversalExpressionValidator {
|
||||
private static readonly EXPRESSION_PATTERN = /\{\{[\s\S]+?\}\}/;
|
||||
private static readonly EXPRESSION_PREFIX = '=';
|
||||
|
||||
/**
|
||||
* Universal Rule 1: Any field containing {{ }} MUST have = prefix
|
||||
* This is an absolute rule in n8n - no exceptions
|
||||
*/
|
||||
static validateExpressionPrefix(value: any): UniversalValidationResult {
|
||||
// Only validate strings
|
||||
if (typeof value !== 'string') {
|
||||
return {
|
||||
isValid: true,
|
||||
hasExpression: false,
|
||||
needsPrefix: false,
|
||||
isMixedContent: false,
|
||||
confidence: 1.0,
|
||||
explanation: 'Not a string value'
|
||||
};
|
||||
}
|
||||
|
||||
const hasExpression = this.EXPRESSION_PATTERN.test(value);
|
||||
|
||||
if (!hasExpression) {
|
||||
return {
|
||||
isValid: true,
|
||||
hasExpression: false,
|
||||
needsPrefix: false,
|
||||
isMixedContent: false,
|
||||
confidence: 1.0,
|
||||
explanation: 'No n8n expression found'
|
||||
};
|
||||
}
|
||||
|
||||
const hasPrefix = value.startsWith(this.EXPRESSION_PREFIX);
|
||||
const isMixedContent = this.hasMixedContent(value);
|
||||
|
||||
if (!hasPrefix) {
|
||||
return {
|
||||
isValid: false,
|
||||
hasExpression: true,
|
||||
needsPrefix: true,
|
||||
isMixedContent,
|
||||
confidence: 1.0,
|
||||
suggestion: `${this.EXPRESSION_PREFIX}${value}`,
|
||||
explanation: isMixedContent
|
||||
? 'Mixed literal text and expression requires = prefix for expression evaluation'
|
||||
: 'Expression requires = prefix to be evaluated'
|
||||
};
|
||||
}
|
||||
|
||||
return {
|
||||
isValid: true,
|
||||
hasExpression: true,
|
||||
needsPrefix: false,
|
||||
isMixedContent,
|
||||
confidence: 1.0,
|
||||
explanation: 'Expression is properly formatted with = prefix'
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if a string contains both literal text and expressions
|
||||
* Examples:
|
||||
* - "Hello {{ $json.name }}" -> mixed content
|
||||
* - "{{ $json.value }}" -> pure expression
|
||||
* - "https://api.com/{{ $json.id }}" -> mixed content
|
||||
*/
|
||||
private static hasMixedContent(value: string): boolean {
|
||||
// Remove the = prefix if present for analysis
|
||||
const content = value.startsWith(this.EXPRESSION_PREFIX)
|
||||
? value.substring(1)
|
||||
: value;
|
||||
|
||||
// Check if there's any content outside of {{ }}
|
||||
const withoutExpressions = content.replace(/\{\{[\s\S]+?\}\}/g, '');
|
||||
return withoutExpressions.trim().length > 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Universal Rule 2: Expression syntax validation
|
||||
* Check for common syntax errors that prevent evaluation
|
||||
*/
|
||||
static validateExpressionSyntax(value: string): UniversalValidationResult {
|
||||
// First, check if there's any expression pattern at all
|
||||
const hasAnyBrackets = value.includes('{{') || value.includes('}}');
|
||||
|
||||
if (!hasAnyBrackets) {
|
||||
return {
|
||||
isValid: true,
|
||||
hasExpression: false,
|
||||
needsPrefix: false,
|
||||
isMixedContent: false,
|
||||
confidence: 1.0,
|
||||
explanation: 'No expression to validate'
|
||||
};
|
||||
}
|
||||
|
||||
// Check for unclosed brackets in the entire string
|
||||
const openCount = (value.match(/\{\{/g) || []).length;
|
||||
const closeCount = (value.match(/\}\}/g) || []).length;
|
||||
|
||||
if (openCount !== closeCount) {
|
||||
return {
|
||||
isValid: false,
|
||||
hasExpression: true,
|
||||
needsPrefix: false,
|
||||
isMixedContent: false,
|
||||
confidence: 1.0,
|
||||
explanation: `Unmatched expression brackets: ${openCount} opening, ${closeCount} closing`
|
||||
};
|
||||
}
|
||||
|
||||
// Extract properly matched expressions for further validation
|
||||
const expressions = value.match(/\{\{[\s\S]+?\}\}/g) || [];
|
||||
|
||||
for (const expr of expressions) {
|
||||
// Check for empty expressions
|
||||
const content = expr.slice(2, -2).trim();
|
||||
if (!content) {
|
||||
return {
|
||||
isValid: false,
|
||||
hasExpression: true,
|
||||
needsPrefix: false,
|
||||
isMixedContent: false,
|
||||
confidence: 1.0,
|
||||
explanation: 'Empty expression {{ }} is not valid'
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
return {
|
||||
isValid: true,
|
||||
hasExpression: expressions.length > 0,
|
||||
needsPrefix: false,
|
||||
isMixedContent: this.hasMixedContent(value),
|
||||
confidence: 1.0,
|
||||
explanation: 'Expression syntax is valid'
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Universal Rule 3: Common n8n expression patterns
|
||||
* Validate against known n8n expression patterns
|
||||
*/
|
||||
static validateCommonPatterns(value: string): UniversalValidationResult {
|
||||
if (!this.EXPRESSION_PATTERN.test(value)) {
|
||||
return {
|
||||
isValid: true,
|
||||
hasExpression: false,
|
||||
needsPrefix: false,
|
||||
isMixedContent: false,
|
||||
confidence: 1.0,
|
||||
explanation: 'No expression to validate'
|
||||
};
|
||||
}
|
||||
|
||||
const expressions = value.match(/\{\{[\s\S]+?\}\}/g) || [];
|
||||
const warnings: string[] = [];
|
||||
|
||||
for (const expr of expressions) {
|
||||
const content = expr.slice(2, -2).trim();
|
||||
|
||||
// Check for common mistakes
|
||||
if (content.includes('${') && content.includes('}')) {
|
||||
warnings.push(`Template literal syntax \${} found - use n8n syntax instead: ${expr}`);
|
||||
}
|
||||
|
||||
if (content.startsWith('=')) {
|
||||
warnings.push(`Double prefix detected in expression: ${expr}`);
|
||||
}
|
||||
|
||||
if (content.includes('{{') || content.includes('}}')) {
|
||||
warnings.push(`Nested brackets detected: ${expr}`);
|
||||
}
|
||||
}
|
||||
|
||||
if (warnings.length > 0) {
|
||||
return {
|
||||
isValid: false,
|
||||
hasExpression: true,
|
||||
needsPrefix: false,
|
||||
isMixedContent: false,
|
||||
confidence: 1.0,
|
||||
explanation: warnings.join('; ')
|
||||
};
|
||||
}
|
||||
|
||||
return {
|
||||
isValid: true,
|
||||
hasExpression: true,
|
||||
needsPrefix: false,
|
||||
isMixedContent: this.hasMixedContent(value),
|
||||
confidence: 1.0,
|
||||
explanation: 'Expression patterns are valid'
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Perform all universal validations
|
||||
*/
|
||||
static validate(value: any): UniversalValidationResult[] {
|
||||
const results: UniversalValidationResult[] = [];
|
||||
|
||||
// Run all universal validators
|
||||
const prefixResult = this.validateExpressionPrefix(value);
|
||||
if (!prefixResult.isValid) {
|
||||
results.push(prefixResult);
|
||||
}
|
||||
|
||||
if (typeof value === 'string') {
|
||||
const syntaxResult = this.validateExpressionSyntax(value);
|
||||
if (!syntaxResult.isValid) {
|
||||
results.push(syntaxResult);
|
||||
}
|
||||
|
||||
const patternResult = this.validateCommonPatterns(value);
|
||||
if (!patternResult.isValid) {
|
||||
results.push(patternResult);
|
||||
}
|
||||
}
|
||||
|
||||
// If no issues found, return a success result
|
||||
if (results.length === 0) {
|
||||
results.push({
|
||||
isValid: true,
|
||||
hasExpression: prefixResult.hasExpression,
|
||||
needsPrefix: false,
|
||||
isMixedContent: prefixResult.isMixedContent,
|
||||
confidence: 1.0,
|
||||
explanation: prefixResult.hasExpression
|
||||
? 'Expression is valid'
|
||||
: 'No expression found'
|
||||
});
|
||||
}
|
||||
|
||||
return results;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get a corrected version of the value
|
||||
*/
|
||||
static getCorrectedValue(value: string): string {
|
||||
if (!this.EXPRESSION_PATTERN.test(value)) {
|
||||
return value;
|
||||
}
|
||||
|
||||
if (!value.startsWith(this.EXPRESSION_PREFIX)) {
|
||||
return `${this.EXPRESSION_PREFIX}${value}`;
|
||||
}
|
||||
|
||||
return value;
|
||||
}
|
||||
}
|
||||
@@ -6,6 +6,7 @@
|
||||
import { NodeRepository } from '../database/node-repository';
|
||||
import { EnhancedConfigValidator } from './enhanced-config-validator';
|
||||
import { ExpressionValidator } from './expression-validator';
|
||||
import { ExpressionFormatValidator } from './expression-format-validator';
|
||||
import { Logger } from '../utils/logger';
|
||||
const logger = new Logger({ prefix: '[WorkflowValidator]' });
|
||||
|
||||
@@ -991,6 +992,39 @@ export class WorkflowValidator {
|
||||
message: `Expression warning: ${warning}`
|
||||
});
|
||||
});
|
||||
|
||||
// Validate expression format (check for missing = prefix and resource locator format)
|
||||
const formatContext = {
|
||||
nodeType: node.type,
|
||||
nodeName: node.name,
|
||||
nodeId: node.id
|
||||
};
|
||||
|
||||
const formatIssues = ExpressionFormatValidator.validateNodeParameters(
|
||||
node.parameters,
|
||||
formatContext
|
||||
);
|
||||
|
||||
// Add format errors and warnings
|
||||
formatIssues.forEach(issue => {
|
||||
const formattedMessage = ExpressionFormatValidator.formatErrorMessage(issue, formatContext);
|
||||
|
||||
if (issue.severity === 'error') {
|
||||
result.errors.push({
|
||||
type: 'error',
|
||||
nodeId: node.id,
|
||||
nodeName: node.name,
|
||||
message: formattedMessage
|
||||
});
|
||||
} else {
|
||||
result.warnings.push({
|
||||
type: 'warning',
|
||||
nodeId: node.id,
|
||||
nodeName: node.name,
|
||||
message: formattedMessage
|
||||
});
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@@ -1,6 +1,16 @@
|
||||
// n8n API Types - Ported from n8n-manager-for-ai-agents
|
||||
// These types define the structure of n8n API requests and responses
|
||||
|
||||
// Resource Locator Types
|
||||
export interface ResourceLocatorValue {
|
||||
__rl: true;
|
||||
value: string;
|
||||
mode: 'id' | 'url' | 'expression' | string;
|
||||
}
|
||||
|
||||
// Expression Format Types
|
||||
export type ExpressionValue = string | ResourceLocatorValue;
|
||||
|
||||
// Workflow Node Types
|
||||
export interface WorkflowNode {
|
||||
id: string;
|
||||
|
||||
Reference in New Issue
Block a user