llmverify
Version:
AI Output Verification Toolkit — Local-first LLM safety, hallucination detection, PII redaction, prompt injection defense, and runtime monitoring. Zero telemetry. OWASP LLM Top 10 aligned.
181 lines • 21.6 kB
JavaScript
;
/**
* JSON Validator Engine
*
* Validates JSON structure and optionally schema.
*
* @module engines/json-validator
* @author Haiec
* @license MIT
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.JSONValidatorEngine = void 0;
class JSONValidatorEngine {
constructor(_config) {
this._config = _config;
this.LIMITATIONS = [
'Basic JSON structure validation',
'Simple schema validation (type checking only)',
'Does not validate semantic correctness',
'Limited repair capabilities'
];
this.METHODOLOGY = 'Parses JSON content and validates structure. Performs basic schema ' +
'validation if schema is provided. Attempts simple repairs for common issues.';
}
async validate(content, schema) {
let parsed = null;
let valid = false;
let repaired = false;
let repairMethod;
const issues = [];
// Try to parse
try {
parsed = JSON.parse(content);
valid = true;
}
catch (e) {
// Try to repair
const repairResult = this.attemptRepair(content);
if (repairResult.success) {
parsed = repairResult.parsed;
valid = true;
repaired = true;
repairMethod = repairResult.method;
issues.push(`Repaired: ${repairMethod}`);
}
else {
issues.push(`Parse error: ${e.message}`);
}
}
// Schema validation
let schemaValid = true;
const schemaErrors = [];
if (valid && schema && parsed) {
const schemaResult = this.validateSchema(parsed, schema);
schemaValid = schemaResult.valid;
schemaErrors.push(...schemaResult.errors);
}
// Structure analysis
const structure = this.analyzeStructure(parsed);
structure.issues.push(...issues);
return {
valid,
parsed,
schema,
schemaValid,
schemaErrors,
repaired,
repairMethod,
structure,
limitations: this.LIMITATIONS,
methodology: this.METHODOLOGY
};
}
attemptRepair(content) {
// Try common repairs
const repairs = [
{
name: 'trailing comma removal',
fix: (s) => s.replace(/,\s*([\]}])/g, '$1')
},
{
name: 'single to double quotes',
fix: (s) => s.replace(/'/g, '"')
},
{
name: 'unquoted keys',
fix: (s) => s.replace(/(\{|,)\s*([a-zA-Z_][a-zA-Z0-9_]*)\s*:/g, '$1"$2":')
},
{
name: 'extract JSON from text',
fix: (s) => {
const match = s.match(/\{[\s\S]*\}|\[[\s\S]*\]/);
return match ? match[0] : s;
}
}
];
for (const repair of repairs) {
try {
const fixed = repair.fix(content);
const parsed = JSON.parse(fixed);
return { success: true, parsed, method: repair.name };
}
catch {
continue;
}
}
return { success: false };
}
validateSchema(data, schema) {
const errors = [];
if (typeof schema !== 'object' || schema === null) {
return { valid: true, errors: [] };
}
const schemaObj = schema;
if (typeof data !== 'object' || data === null) {
errors.push('Data is not an object');
return { valid: false, errors };
}
const dataObj = data;
// Simple type checking
for (const [key, expectedType] of Object.entries(schemaObj)) {
if (!(key in dataObj)) {
errors.push(`Missing required field: ${key}`);
continue;
}
const actualType = typeof dataObj[key];
if (expectedType === 'array') {
if (!Array.isArray(dataObj[key])) {
errors.push(`Field ${key}: expected array, got ${actualType}`);
}
}
else if (actualType !== expectedType) {
errors.push(`Field ${key}: expected ${expectedType}, got ${actualType}`);
}
}
return { valid: errors.length === 0, errors };
}
analyzeStructure(data) {
if (data === null || data === undefined) {
return { depth: 0, keyCount: 0, issues: ['No valid data to analyze'] };
}
const depth = this.calculateDepth(data);
const keyCount = this.countKeys(data);
const issues = [];
if (depth > 10) {
issues.push('Deep nesting detected (>10 levels)');
}
if (keyCount > 1000) {
issues.push('Large object detected (>1000 keys)');
}
return { depth, keyCount, issues };
}
calculateDepth(data, current = 0) {
if (typeof data !== 'object' || data === null) {
return current;
}
if (Array.isArray(data)) {
return Math.max(current, ...data.map(item => this.calculateDepth(item, current + 1)));
}
const values = Object.values(data);
if (values.length === 0)
return current;
return Math.max(...values.map(v => this.calculateDepth(v, current + 1)));
}
countKeys(data) {
if (typeof data !== 'object' || data === null) {
return 0;
}
if (Array.isArray(data)) {
return data.reduce((sum, item) => sum + this.countKeys(item), 0);
}
const obj = data;
let count = Object.keys(obj).length;
for (const value of Object.values(obj)) {
count += this.countKeys(value);
}
return count;
}
}
exports.JSONValidatorEngine = JSONValidatorEngine;
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* JSON Validator Engine\n * \n * Validates JSON structure and optionally schema.\n * \n * @module engines/json-validator\n * @author Haiec\n * @license MIT\n */\n\nimport { Config } from '../../types/config';\nimport { JSONResult } from '../../types/results';\n\nexport class JSONValidatorEngine {\n  private readonly LIMITATIONS = [\n    'Basic JSON structure validation',\n    'Simple schema validation (type checking only)',\n    'Does not validate semantic correctness',\n    'Limited repair capabilities'\n  ];\n  \n  private readonly METHODOLOGY = \n    'Parses JSON content and validates structure. Performs basic schema ' +\n    'validation if schema is provided. Attempts simple repairs for common issues.';\n  \n  constructor(private _config: Config) {}\n  \n  async validate(content: string, schema?: unknown): Promise<JSONResult> {\n    let parsed: unknown = null;\n    let valid = false;\n    let repaired = false;\n    let repairMethod: string | undefined;\n    const issues: string[] = [];\n    \n    // Try to parse\n    try {\n      parsed = JSON.parse(content);\n      valid = true;\n    } catch (e) {\n      // Try to repair\n      const repairResult = this.attemptRepair(content);\n      if (repairResult.success) {\n        parsed = repairResult.parsed;\n        valid = true;\n        repaired = true;\n        repairMethod = repairResult.method;\n        issues.push(`Repaired: ${repairMethod}`);\n      } else {\n        issues.push(`Parse error: ${(e as Error).message}`);\n      }\n    }\n    \n    // Schema validation\n    let schemaValid = true;\n    const schemaErrors: string[] = [];\n    \n    if (valid && schema && parsed) {\n      const schemaResult = this.validateSchema(parsed, schema);\n      schemaValid = schemaResult.valid;\n      schemaErrors.push(...schemaResult.errors);\n    }\n    \n    // Structure analysis\n    const structure = this.analyzeStructure(parsed);\n    structure.issues.push(...issues);\n    \n    return {\n      valid,\n      parsed,\n      schema,\n      schemaValid,\n      schemaErrors,\n      repaired,\n      repairMethod,\n      structure,\n      limitations: this.LIMITATIONS,\n      methodology: this.METHODOLOGY\n    };\n  }\n  \n  private attemptRepair(content: string): { success: boolean; parsed?: unknown; method?: string } {\n    // Try common repairs\n    const repairs = [\n      {\n        name: 'trailing comma removal',\n        fix: (s: string) => s.replace(/,\\s*([\\]}])/g, '$1')\n      },\n      {\n        name: 'single to double quotes',\n        fix: (s: string) => s.replace(/'/g, '\"')\n      },\n      {\n        name: 'unquoted keys',\n        fix: (s: string) => s.replace(/(\\{|,)\\s*([a-zA-Z_][a-zA-Z0-9_]*)\\s*:/g, '$1\"$2\":')\n      },\n      {\n        name: 'extract JSON from text',\n        fix: (s: string) => {\n          const match = s.match(/\\{[\\s\\S]*\\}|\\[[\\s\\S]*\\]/);\n          return match ? match[0] : s;\n        }\n      }\n    ];\n    \n    for (const repair of repairs) {\n      try {\n        const fixed = repair.fix(content);\n        const parsed = JSON.parse(fixed);\n        return { success: true, parsed, method: repair.name };\n      } catch {\n        continue;\n      }\n    }\n    \n    return { success: false };\n  }\n  \n  private validateSchema(\n    data: unknown, \n    schema: unknown\n  ): { valid: boolean; errors: string[] } {\n    const errors: string[] = [];\n    \n    if (typeof schema !== 'object' || schema === null) {\n      return { valid: true, errors: [] };\n    }\n    \n    const schemaObj = schema as Record<string, unknown>;\n    \n    if (typeof data !== 'object' || data === null) {\n      errors.push('Data is not an object');\n      return { valid: false, errors };\n    }\n    \n    const dataObj = data as Record<string, unknown>;\n    \n    // Simple type checking\n    for (const [key, expectedType] of Object.entries(schemaObj)) {\n      if (!(key in dataObj)) {\n        errors.push(`Missing required field: ${key}`);\n        continue;\n      }\n      \n      const actualType = typeof dataObj[key];\n      \n      if (expectedType === 'array') {\n        if (!Array.isArray(dataObj[key])) {\n          errors.push(`Field ${key}: expected array, got ${actualType}`);\n        }\n      } else if (actualType !== expectedType) {\n        errors.push(`Field ${key}: expected ${expectedType}, got ${actualType}`);\n      }\n    }\n    \n    return { valid: errors.length === 0, errors };\n  }\n  \n  private analyzeStructure(data: unknown): { depth: number; keyCount: number; issues: string[] } {\n    if (data === null || data === undefined) {\n      return { depth: 0, keyCount: 0, issues: ['No valid data to analyze'] };\n    }\n    \n    const depth = this.calculateDepth(data);\n    const keyCount = this.countKeys(data);\n    const issues: string[] = [];\n    \n    if (depth > 10) {\n      issues.push('Deep nesting detected (>10 levels)');\n    }\n    \n    if (keyCount > 1000) {\n      issues.push('Large object detected (>1000 keys)');\n    }\n    \n    return { depth, keyCount, issues };\n  }\n  \n  private calculateDepth(data: unknown, current = 0): number {\n    if (typeof data !== 'object' || data === null) {\n      return current;\n    }\n    \n    if (Array.isArray(data)) {\n      return Math.max(current, ...data.map(item => this.calculateDepth(item, current + 1)));\n    }\n    \n    const values = Object.values(data as Record<string, unknown>);\n    if (values.length === 0) return current;\n    \n    return Math.max(...values.map(v => this.calculateDepth(v, current + 1)));\n  }\n  \n  private countKeys(data: unknown): number {\n    if (typeof data !== 'object' || data === null) {\n      return 0;\n    }\n    \n    if (Array.isArray(data)) {\n      return data.reduce((sum, item) => sum + this.countKeys(item), 0);\n    }\n    \n    const obj = data as Record<string, unknown>;\n    let count = Object.keys(obj).length;\n    \n    for (const value of Object.values(obj)) {\n      count += this.countKeys(value);\n    }\n    \n    return count;\n  }\n}\n"]}