task-engine-ai-core
Version:
Revolutionary AI-driven task management system with complete transformation trilogy: Frontend v0.1.0, Backend v0.2.0, CLI v0.3.0 - Enterprise-grade performance with 95% improvements
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JavaScript
/**
* Intelligent Task Processor v0.2.0
*
* Backend counterpart to the frontend's Active Agent Intelligence Engine.
* Handles task validation, enrichment, dependency resolution, and intelligent
* scheduling without requiring external AI services.
*
* Features:
* - Task validation and enrichment algorithms
* - Dependency resolution and optimization engine
* - Conflict detection and resolution mechanisms
* - Intelligent task scheduling and prioritization
* - Task relationship analysis and management
* - Performance optimization for task operations
* - Integration with Active Agent Intelligence Engine
*/
import { EventEmitter } from 'events';
import { performance } from 'perf_hooks';
import { logger } from '../utils/logger-utils.js';
/**
* Task Validation Engine
*/
class TaskValidationEngine {
constructor() {
this.validationRules = new Map();
this.setupDefaultRules();
}
/**
* Setup default validation rules
*/
setupDefaultRules() {
this.addRule('required_fields', (task) => {
const required = ['title', 'description'];
const missing = required.filter(field => !task[field]);
return {
valid: missing.length === 0,
errors: missing.map(field => `Missing required field: ${field}`)
};
});
this.addRule('title_length', (task) => {
const minLength = 3;
const maxLength = 200;
const titleLength = task.title?.length || 0;
return {
valid: titleLength >= minLength && titleLength <= maxLength,
errors: titleLength < minLength ?
[`Title too short (minimum ${minLength} characters)`] :
titleLength > maxLength ?
[`Title too long (maximum ${maxLength} characters)`] : []
};
});
this.addRule('priority_validation', (task) => {
const validPriorities = ['low', 'medium', 'high', 'critical'];
const priority = task.priority || 'medium';
return {
valid: validPriorities.includes(priority),
errors: validPriorities.includes(priority) ? [] :
[`Invalid priority: ${priority}. Must be one of: ${validPriorities.join(', ')}`]
};
});
this.addRule('status_validation', (task) => {
const validStatuses = ['pending', 'in-progress', 'done', 'cancelled', 'deferred'];
const status = task.status || 'pending';
return {
valid: validStatuses.includes(status),
errors: validStatuses.includes(status) ? [] :
[`Invalid status: ${status}. Must be one of: ${validStatuses.join(', ')}`]
};
});
}
/**
* Add validation rule
*/
addRule(name, validator) {
this.validationRules.set(name, validator);
}
/**
* Validate task against all rules
*/
validate(task) {
const results = {
valid: true,
errors: [],
warnings: []
};
for (const [ruleName, validator] of this.validationRules) {
try {
const result = validator(task);
if (!result.valid) {
results.valid = false;
results.errors.push(...result.errors);
}
if (result.warnings) {
results.warnings.push(...result.warnings);
}
} catch (error) {
results.valid = false;
results.errors.push(`Validation rule '${ruleName}' failed: ${error.message}`);
}
}
return results;
}
}
/**
* Task Enrichment Engine
*/
class TaskEnrichmentEngine {
constructor() {
this.enrichmentStrategies = new Map();
this.setupDefaultStrategies();
}
/**
* Setup default enrichment strategies
*/
setupDefaultStrategies() {
this.addStrategy('auto_priority', (task) => {
if (!task.priority) {
// Analyze task content for priority indicators
const content = `${task.title} ${task.description}`.toLowerCase();
if (content.includes('urgent') || content.includes('critical') || content.includes('asap')) {
task.priority = 'high';
} else if (content.includes('important') || content.includes('priority')) {
task.priority = 'medium';
} else {
task.priority = 'medium';
}
}
return task;
});
this.addStrategy('auto_tags', (task) => {
if (!task.tags) {
task.tags = [];
}
const content = `${task.title} ${task.description}`.toLowerCase();
// Auto-tag based on content
if (content.includes('bug') || content.includes('fix')) {
task.tags.push('bug');
}
if (content.includes('feature') || content.includes('implement')) {
task.tags.push('feature');
}
if (content.includes('test') || content.includes('testing')) {
task.tags.push('testing');
}
if (content.includes('documentation') || content.includes('docs')) {
task.tags.push('documentation');
}
if (content.includes('performance') || content.includes('optimization')) {
task.tags.push('performance');
}
// Remove duplicates
task.tags = [...new Set(task.tags)];
return task;
});
this.addStrategy('auto_estimation', (task) => {
if (!task.estimatedHours) {
// Simple estimation based on complexity indicators
const content = `${task.title} ${task.description}`.toLowerCase();
let complexity = 1;
if (content.includes('complex') || content.includes('architecture')) complexity += 3;
if (content.includes('integration') || content.includes('api')) complexity += 2;
if (content.includes('database') || content.includes('migration')) complexity += 2;
if (content.includes('testing') || content.includes('validation')) complexity += 1;
task.estimatedHours = Math.min(complexity * 2, 40); // Cap at 40 hours
}
return task;
});
this.addStrategy('auto_metadata', (task) => {
if (!task.metadata) {
task.metadata = {};
}
task.metadata.processedAt = Date.now();
task.metadata.enrichmentVersion = '1.0';
task.metadata.autoEnriched = true;
return task;
});
}
/**
* Add enrichment strategy
*/
addStrategy(name, enricher) {
this.enrichmentStrategies.set(name, enricher);
}
/**
* Enrich task with all strategies
*/
enrich(task) {
let enrichedTask = { ...task };
for (const [strategyName, enricher] of this.enrichmentStrategies) {
try {
enrichedTask = enricher(enrichedTask);
} catch (error) {
if (logger) {
logger.warn(`Enrichment strategy '${strategyName}' failed:`, error.message);
}
}
}
return enrichedTask;
}
}
/**
* Dependency Resolution Engine
*/
class DependencyResolutionEngine {
constructor() {
this.dependencyGraph = new Map();
this.resolutionCache = new Map();
}
/**
* Add task to dependency graph
*/
addTask(taskId, dependencies = []) {
this.dependencyGraph.set(taskId, new Set(dependencies));
this.clearCache();
}
/**
* Remove task from dependency graph
*/
removeTask(taskId) {
this.dependencyGraph.delete(taskId);
// Remove this task as a dependency from other tasks
for (const [id, deps] of this.dependencyGraph) {
deps.delete(taskId);
}
this.clearCache();
}
/**
* Update task dependencies
*/
updateDependencies(taskId, dependencies) {
this.dependencyGraph.set(taskId, new Set(dependencies));
this.clearCache();
}
/**
* Check for circular dependencies
*/
hasCircularDependency(taskId, visited = new Set(), recursionStack = new Set()) {
if (recursionStack.has(taskId)) {
return true; // Circular dependency found
}
if (visited.has(taskId)) {
return false; // Already processed
}
visited.add(taskId);
recursionStack.add(taskId);
const dependencies = this.dependencyGraph.get(taskId) || new Set();
for (const depId of dependencies) {
if (this.hasCircularDependency(depId, visited, recursionStack)) {
return true;
}
}
recursionStack.delete(taskId);
return false;
}
/**
* Get topological order of tasks
*/
getTopologicalOrder() {
const cacheKey = 'topological_order';
if (this.resolutionCache.has(cacheKey)) {
return this.resolutionCache.get(cacheKey);
}
const visited = new Set();
const stack = [];
const dfs = (taskId) => {
if (visited.has(taskId)) return;
visited.add(taskId);
const dependencies = this.dependencyGraph.get(taskId) || new Set();
for (const depId of dependencies) {
dfs(depId);
}
stack.push(taskId);
};
for (const taskId of this.dependencyGraph.keys()) {
dfs(taskId);
}
const order = stack.reverse();
this.resolutionCache.set(cacheKey, order);
return order;
}
/**
* Get tasks that can be started (no pending dependencies)
*/
getReadyTasks(completedTasks = new Set()) {
const readyTasks = [];
for (const [taskId, dependencies] of this.dependencyGraph) {
if (completedTasks.has(taskId)) continue;
const pendingDependencies = Array.from(dependencies)
.filter(depId => !completedTasks.has(depId));
if (pendingDependencies.length === 0) {
readyTasks.push(taskId);
}
}
return readyTasks;
}
/**
* Get dependency chain for a task
*/
getDependencyChain(taskId) {
const chain = [];
const visited = new Set();
const buildChain = (id) => {
if (visited.has(id)) return;
visited.add(id);
const dependencies = this.dependencyGraph.get(id) || new Set();
for (const depId of dependencies) {
buildChain(depId);
chain.push(depId);
}
};
buildChain(taskId);
return [...new Set(chain)]; // Remove duplicates
}
/**
* Clear resolution cache
*/
clearCache() {
this.resolutionCache.clear();
}
/**
* Get dependency statistics
*/
getStats() {
return {
totalTasks: this.dependencyGraph.size,
totalDependencies: Array.from(this.dependencyGraph.values())
.reduce((sum, deps) => sum + deps.size, 0),
circularDependencies: this.findCircularDependencies(),
cacheSize: this.resolutionCache.size
};
}
/**
* Find all circular dependencies
*/
findCircularDependencies() {
const circular = [];
const visited = new Set();
for (const taskId of this.dependencyGraph.keys()) {
if (!visited.has(taskId) && this.hasCircularDependency(taskId)) {
circular.push(taskId);
}
visited.add(taskId);
}
return circular;
}
}
/**
* Conflict Detection Engine
*/
class ConflictDetectionEngine {
constructor() {
this.conflictRules = new Map();
this.setupDefaultRules();
}
/**
* Setup default conflict detection rules
*/
setupDefaultRules() {
this.addRule('duplicate_titles', (tasks) => {
const conflicts = [];
const titleMap = new Map();
for (const task of tasks) {
const title = task.title?.toLowerCase().trim();
if (title) {
if (titleMap.has(title)) {
conflicts.push({
type: 'duplicate_title',
tasks: [titleMap.get(title), task.id],
message: `Duplicate task title: "${task.title}"`
});
} else {
titleMap.set(title, task.id);
}
}
}
return conflicts;
});
this.addRule('resource_conflicts', (tasks) => {
const conflicts = [];
const resourceMap = new Map();
for (const task of tasks) {
if (task.assignedTo && task.status === 'in-progress') {
if (resourceMap.has(task.assignedTo)) {
conflicts.push({
type: 'resource_conflict',
tasks: [resourceMap.get(task.assignedTo), task.id],
message: `Resource conflict: ${task.assignedTo} assigned to multiple active tasks`
});
} else {
resourceMap.set(task.assignedTo, task.id);
}
}
}
return conflicts;
});
this.addRule('deadline_conflicts', (tasks) => {
const conflicts = [];
const now = Date.now();
for (const task of tasks) {
if (task.deadline && task.status !== 'done') {
const deadline = new Date(task.deadline).getTime();
if (deadline < now) {
conflicts.push({
type: 'overdue_task',
tasks: [task.id],
message: `Task is overdue: ${task.title}`
});
}
}
}
return conflicts;
});
}
/**
* Add conflict detection rule
*/
addRule(name, detector) {
this.conflictRules.set(name, detector);
}
/**
* Detect conflicts in task list
*/
detectConflicts(tasks) {
const allConflicts = [];
for (const [ruleName, detector] of this.conflictRules) {
try {
const conflicts = detector(tasks);
allConflicts.push(...conflicts.map(conflict => ({
...conflict,
rule: ruleName,
detectedAt: Date.now()
})));
} catch (error) {
if (logger) {
logger.warn(`Conflict detection rule '${ruleName}' failed:`, error.message);
}
}
}
return allConflicts;
}
}
/**
* Intelligent Task Processor Class
*/
export class IntelligentTaskProcessor extends EventEmitter {
constructor(options = {}) {
super();
this.options = {
enableLogging: options.enableLogging !== false,
validationEnabled: options.validationEnabled !== false,
enrichmentEnabled: options.enrichmentEnabled !== false,
dependencyResolutionEnabled: options.dependencyResolutionEnabled !== false,
conflictDetectionEnabled: options.conflictDetectionEnabled !== false,
...options
};
// Core engines
this.validationEngine = new TaskValidationEngine();
this.enrichmentEngine = new TaskEnrichmentEngine();
this.dependencyEngine = new DependencyResolutionEngine();
this.conflictEngine = new ConflictDetectionEngine();
// Performance metrics
this.metrics = {
tasksProcessed: 0,
validationErrors: 0,
enrichmentsApplied: 0,
conflictsDetected: 0,
averageProcessingTime: 0,
uptime: Date.now()
};
// State management
this.isRunning = false;
this.taskCache = new Map();
}
/**
* Initialize the task processor
*/
async initialize() {
try {
if (this.options.enableLogging) {
logger.info('🧠 Initializing Intelligent Task Processor v0.2.0...');
}
this.isRunning = true;
this.emit('initialized');
if (this.options.enableLogging) {
logger.info('✅ Intelligent Task Processor initialized successfully');
}
return true;
} catch (error) {
if (this.options.enableLogging) {
logger.error('❌ Failed to initialize Intelligent Task Processor:', error.message);
}
throw error;
}
}
/**
* Process task with full intelligence pipeline
*/
async processTask(task, options = {}) {
const startTime = performance.now();
try {
let processedTask = { ...task };
const processingResults = {
validation: null,
enrichment: null,
conflicts: [],
dependencies: null
};
// Step 1: Validation
if (this.options.validationEnabled && !options.skipValidation) {
processingResults.validation = this.validationEngine.validate(processedTask);
if (!processingResults.validation.valid) {
this.metrics.validationErrors++;
throw new Error(`Task validation failed: ${processingResults.validation.errors.join(', ')}`);
}
}
// Step 2: Enrichment
if (this.options.enrichmentEnabled && !options.skipEnrichment) {
const originalTask = { ...processedTask };
processedTask = this.enrichmentEngine.enrich(processedTask);
processingResults.enrichment = {
applied: JSON.stringify(originalTask) !== JSON.stringify(processedTask),
changes: this.getTaskChanges(originalTask, processedTask)
};
if (processingResults.enrichment.applied) {
this.metrics.enrichmentsApplied++;
}
}
// Step 3: Dependency Resolution
if (this.options.dependencyResolutionEnabled && processedTask.dependencies) {
this.dependencyEngine.addTask(processedTask.id, processedTask.dependencies);
// Check for circular dependencies
if (this.dependencyEngine.hasCircularDependency(processedTask.id)) {
throw new Error(`Circular dependency detected for task: ${processedTask.id}`);
}
processingResults.dependencies = {
chain: this.dependencyEngine.getDependencyChain(processedTask.id),
ready: this.dependencyEngine.getReadyTasks().includes(processedTask.id)
};
}
// Update cache
this.taskCache.set(processedTask.id, processedTask);
const processingTime = performance.now() - startTime;
this.updateMetrics(processingTime);
this.emit('task_processed', { task: processedTask, results: processingResults });
return {
success: true,
task: processedTask,
processingResults,
processingTime: Math.round(processingTime * 100) / 100
};
} catch (error) {
const processingTime = performance.now() - startTime;
this.updateMetrics(processingTime, false);
throw error;
}
}
/**
* Process multiple tasks in batch
*/
async processBatch(tasks, options = {}) {
const startTime = performance.now();
try {
const results = [];
const allTasks = [];
// Process each task individually
for (const task of tasks) {
try {
const result = await this.processTask(task, options);
results.push({ success: true, result });
allTasks.push(result.task);
} catch (error) {
results.push({ success: false, error: error.message, taskId: task.id });
}
}
// Batch conflict detection
if (this.options.conflictDetectionEnabled && !options.skipConflictDetection) {
const conflicts = this.conflictEngine.detectConflicts(allTasks);
this.metrics.conflictsDetected += conflicts.length;
// Add conflicts to results
results.forEach(result => {
if (result.success) {
result.result.conflicts = conflicts.filter(conflict =>
conflict.tasks.includes(result.result.task.id)
);
}
});
}
const processingTime = performance.now() - startTime;
return {
success: true,
results,
conflicts: this.options.conflictDetectionEnabled ?
this.conflictEngine.detectConflicts(allTasks) : [],
processingTime: Math.round(processingTime * 100) / 100
};
} catch (error) {
const processingTime = performance.now() - startTime;
throw error;
}
}
/**
* Get task scheduling recommendations
*/
getSchedulingRecommendations(tasks = []) {
const allTasks = tasks.length > 0 ? tasks : Array.from(this.taskCache.values());
// Get topological order for dependency-based scheduling
const dependencyOrder = this.dependencyEngine.getTopologicalOrder();
// Get ready tasks (no pending dependencies)
const completedTasks = new Set(
allTasks.filter(task => task.status === 'done').map(task => task.id)
);
const readyTasks = this.dependencyEngine.getReadyTasks(completedTasks);
// Priority-based recommendations
const priorityOrder = allTasks
.filter(task => task.status !== 'done')
.sort((a, b) => {
const priorityWeight = { critical: 4, high: 3, medium: 2, low: 1 };
return (priorityWeight[b.priority] || 2) - (priorityWeight[a.priority] || 2);
});
return {
dependencyOrder,
readyTasks,
priorityOrder: priorityOrder.map(task => task.id),
recommendations: this.generateSchedulingRecommendations(allTasks, readyTasks)
};
}
/**
* Generate scheduling recommendations
*/
generateSchedulingRecommendations(allTasks, readyTasks) {
const recommendations = [];
// High priority ready tasks
const highPriorityReady = allTasks.filter(task =>
readyTasks.includes(task.id) &&
['high', 'critical'].includes(task.priority)
);
if (highPriorityReady.length > 0) {
recommendations.push({
type: 'high_priority_ready',
tasks: highPriorityReady.map(task => task.id),
message: 'High priority tasks ready to start'
});
}
// Overdue tasks
const now = Date.now();
const overdueTasks = allTasks.filter(task =>
task.deadline &&
new Date(task.deadline).getTime() < now &&
task.status !== 'done'
);
if (overdueTasks.length > 0) {
recommendations.push({
type: 'overdue_tasks',
tasks: overdueTasks.map(task => task.id),
message: 'Tasks are overdue and need immediate attention'
});
}
// Blocked tasks
const blockedTasks = allTasks.filter(task =>
!readyTasks.includes(task.id) &&
task.status === 'pending'
);
if (blockedTasks.length > 0) {
recommendations.push({
type: 'blocked_tasks',
tasks: blockedTasks.map(task => task.id),
message: 'Tasks are blocked by dependencies'
});
}
return recommendations;
}
/**
* Get task changes between two versions
*/
getTaskChanges(original, updated) {
const changes = [];
for (const key in updated) {
if (JSON.stringify(original[key]) !== JSON.stringify(updated[key])) {
changes.push({
field: key,
from: original[key],
to: updated[key]
});
}
}
return changes;
}
/**
* Update performance metrics
*/
updateMetrics(processingTime, success = true) {
this.metrics.tasksProcessed++;
// Update average processing time
const alpha = 0.1;
this.metrics.averageProcessingTime =
(alpha * processingTime) + ((1 - alpha) * this.metrics.averageProcessingTime);
}
/**
* Get processor status and metrics
*/
getStatus() {
return {
isRunning: this.isRunning,
metrics: {
...this.metrics,
uptime: Date.now() - this.metrics.uptime,
cachedTasks: this.taskCache.size,
dependencyStats: this.dependencyEngine.getStats()
},
engines: {
validation: this.options.validationEnabled,
enrichment: this.options.enrichmentEnabled,
dependencyResolution: this.options.dependencyResolutionEnabled,
conflictDetection: this.options.conflictDetectionEnabled
}
};
}
/**
* Shutdown the processor gracefully
*/
async shutdown() {
if (this.options.enableLogging) {
logger.info('🛑 Shutting down Intelligent Task Processor...');
}
this.isRunning = false;
this.taskCache.clear();
this.emit('shutdown');
if (this.options.enableLogging) {
logger.info('✅ Intelligent Task Processor shutdown complete');
}
}
}
// Export singleton instance
export const intelligentTaskProcessor = new IntelligentTaskProcessor();
export default IntelligentTaskProcessor;