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* Component System for Coherent.js
* Provides component definition, lifecycle, composition, and state management
*/
import { deepClone, validateComponent } from '../core/object-utils.js';
import { performanceMonitor } from '../performance/monitor.js';
/**
* Component registry for global component management
*/
const COMPONENT_REGISTRY = new Map();
// eslint-disable-next-line no-unused-vars -- kept for future devtools/features
const COMPONENT_INSTANCES = new WeakMap();
const COMPONENT_METADATA = new WeakMap();
/**
* Component lifecycle hooks
*/
// eslint-disable-next-line no-unused-vars -- lifecycle map kept for planned hooks
const LIFECYCLE_HOOKS = {
beforeCreate: 'beforeCreate',
created: 'created',
beforeMount: 'beforeMount',
mounted: 'mounted',
beforeUpdate: 'beforeUpdate',
updated: 'updated',
beforeDestroy: 'beforeDestroy',
destroyed: 'destroyed',
errorCaptured: 'errorCaptured'
};
/**
* Component state management class
*
* @class ComponentState
* @description Manages component state with reactive updates and listener notifications.
* Provides immutable state updates with change detection.
*
* @param {Object} [initialState={}] - Initial state object
*
* @example
* const state = new ComponentState({ count: 0 });
* state.set({ count: 1 });
* const count = state.get('count'); // 1
*/
class ComponentState {
constructor(initialState = {}) {
this.state = {...initialState};
this.listeners = new Set();
this.isUpdating = false;
}
/**
* Get state value by key or entire state
*
* @param {string} [key] - State key to retrieve
* @returns {*} State value or entire state object
*/
get(key) {
return key ? this.state[key] : {...this.state};
}
/**
* Update state with new values
*
* @param {Object} updates - State updates to apply
* @returns {ComponentState} This instance for chaining
*/
set(updates) {
if (this.isUpdating) return this;
const oldState = {...this.state};
if (typeof updates === 'function') {
updates = updates(oldState);
}
this.state = {...this.state, ...updates};
// Notify listeners
this.notifyListeners(oldState, this.state);
return this;
}
subscribe(listener) {
this.listeners.add(listener);
return () => this.listeners.delete(listener);
}
notifyListeners(oldState, newState) {
if (this.listeners.size === 0) return;
this.isUpdating = true;
this.listeners.forEach(listener => {
try {
listener(newState, oldState);
} catch (error) {
console.error('State listener error:', error);
}
});
this.isUpdating = false;
}
}
/**
* Base Component class
*/
export class Component {
constructor(definition = {}) {
this.definition = definition;
this.name = definition.name || 'AnonymousComponent';
this.props = {};
this.state = new ComponentState(definition.state || {});
this.children = [];
this.parent = null;
this.rendered = null;
this.isMounted = false;
this.isDestroyed = false;
// Lifecycle hooks
this.hooks = {
beforeCreate: definition.beforeCreate || (() => {
}),
created: definition.created || (() => {
}),
beforeMount: definition.beforeMount || (() => {
}),
mounted: definition.mounted || (() => {
}),
beforeUpdate: definition.beforeUpdate || (() => {
}),
updated: definition.updated || (() => {
}),
beforeDestroy: definition.beforeDestroy || (() => {
}),
destroyed: definition.destroyed || (() => {
}),
errorCaptured: definition.errorCaptured || (() => {
})
};
// Methods
this.methods = definition.methods || {};
Object.keys(this.methods).forEach(methodName => {
if (typeof this.methods[methodName] === 'function') {
this[methodName] = this.methods[methodName].bind(this);
}
});
// Computed properties
this.computed = definition.computed || {};
this.computedCache = new Map();
// Watch properties
this.watchers = definition.watch || {};
this.setupWatchers();
// Store metadata
COMPONENT_METADATA.set(this, {
createdAt: Date.now(),
updateCount: 0,
renderCount: 0
});
// Initialize lifecycle
this.callHook('beforeCreate');
this.initialize();
this.callHook('created');
}
/**
* Initialize component
*/
initialize() {
// Set up state subscription for re-rendering
this.unsubscribeState = this.state.subscribe((newState, oldState) => {
this.onStateChange(newState, oldState);
});
// Initialize computed properties
this.initializeComputed();
}
/**
* Set up watchers for reactive data
*/
setupWatchers() {
Object.keys(this.watchers).forEach(key => {
const handler = this.watchers[key];
// Watch state changes
this.state.subscribe((newState, oldState) => {
if (newState[key] !== oldState[key]) {
handler.call(this, newState[key], oldState[key]);
}
});
});
}
/**
* Initialize computed properties
*/
initializeComputed() {
Object.keys(this.computed).forEach(key => {
Object.defineProperty(this, key, {
get: () => {
if (!this.computedCache.has(key)) {
const value = this.computed[key].call(this);
this.computedCache.set(key, value);
}
return this.computedCache.get(key);
},
enumerable: true
});
});
}
/**
* Handle state changes
*/
onStateChange() {
if (this.isDestroyed) return;
// Clear computed cache
this.computedCache.clear();
// Trigger update if mounted
if (this.isMounted) {
this.update();
}
}
/**
* Call lifecycle hook
*/
callHook(hookName, ...args) {
try {
if (this.hooks[hookName]) {
return this.hooks[hookName].call(this, ...args);
}
} catch (error) {
this.handleError(error, `${hookName} hook`);
}
}
/**
* Handle component errors
*/
handleError(error) {
console.error(`Component Error in ${this.name}:`, error);
// Call error hook
this.callHook('errorCaptured', error);
// Propagate to parent
if (this.parent && this.parent.handleError) {
this.parent.handleError(error, `${this.name} -> ${context}`);
}
}
/**
* Render the component
*/
render(props = {}) {
if (this.isDestroyed) {
console.warn(`Attempting to render destroyed component: ${this.name}`);
return null;
}
try {
// Update metadata
const metadata = COMPONENT_METADATA.get(this);
if (metadata) {
metadata.renderCount++;
}
// Set props
this.props = {...props};
// Call render method
if (typeof this.definition.render === 'function') {
this.rendered = this.definition.render.call(this, this.props, this.state.get());
} else if (typeof this.definition.template !== 'undefined') {
this.rendered = this.processTemplate(this.definition.template, this.props, this.state.get());
} else {
throw new Error(`Component ${this.name} must have either render method or template`);
}
// Validate rendered output
if (this.rendered !== null) {
validateComponent(this.rendered, this.name);
}
return this.rendered;
} catch (error) {
this.handleError(error);
return {div: {className: 'component-error', text: `Error in ${this.name}`}};
}
}
/**
* Process template with data
*/
processTemplate(template, props, state) {
if (typeof template === 'function') {
return template.call(this, props, state);
}
if (typeof template === 'string') {
// Simple string interpolation
return template.replace(/\{\{(\w+)\}\}/g, (match, key) => {
return props[key] || state[key] || '';
});
}
// Clone template object and process
const processed = deepClone(template);
this.interpolateObject(processed, {...props, ...state});
return processed;
}
/**
* Interpolate object with data
*/
interpolateObject(obj, data) {
if (typeof obj === 'string') {
return obj.replace(/\{\{(\w+)\}\}/g, (match, key) => data[key] || '');
}
if (Array.isArray(obj)) {
return obj.map(item => this.interpolateObject(item, data));
}
if (obj && typeof obj === 'object') {
Object.keys(obj).forEach(key => {
obj[key] = this.interpolateObject(obj[key], data);
});
}
return obj;
}
/**
* Mount the component
*/
mount() {
if (this.isMounted || this.isDestroyed) return this;
this.callHook('beforeMount');
this.isMounted = true;
this.callHook('mounted');
return this;
}
/**
* Update the component
*/
update() {
if (!this.isMounted || this.isDestroyed) return this;
const metadata = COMPONENT_METADATA.get(this);
if (metadata) {
metadata.updateCount++;
}
this.callHook('beforeUpdate');
// Re-render will happen automatically via state subscription
this.callHook('updated');
return this;
}
/**
* Destroy the component
*/
destroy() {
if (this.isDestroyed) return this;
this.callHook('beforeDestroy');
// Cleanup
if (this.unsubscribeState) {
this.unsubscribeState();
}
// Destroy children
this.children.forEach(child => {
if (child.destroy) {
child.destroy();
}
});
this.isMounted = false;
this.isDestroyed = true;
this.children = [];
this.parent = null;
this.callHook('destroyed');
return this;
}
/**
* Get component metadata
*/
getMetadata() {
return COMPONENT_METADATA.get(this) || {};
}
/**
* Clone component with new props/state
*/
clone(overrides = {}) {
const newDefinition = {...this.definition, ...overrides};
return new Component(newDefinition);
}
}
/**
* Create a functional component
*/
export function createComponent(definition) {
if (typeof definition === 'function') {
// Convert function to component definition
definition = {
name: definition.name || 'FunctionalComponent',
render: definition
};
}
return new Component(definition);
}
/**
* Create a component factory
*/
export function defineComponent(definition) {
const componentFactory = (props) => {
const component = new Component(definition);
return component.render(props);
};
// Add static properties
componentFactory.componentName = definition.name || 'Component';
componentFactory.definition = definition;
return componentFactory;
}
/**
* Register a global component
*/
export function registerComponent(name, definition) {
if (COMPONENT_REGISTRY.has(name)) {
console.warn(`Component ${name} is already registered. Overriding.`);
}
const component = typeof definition === 'function' ?
defineComponent({name, render: definition}) :
defineComponent(definition);
COMPONENT_REGISTRY.set(name, component);
return component;
}
/**
* Get a registered component
*/
export function getComponent(name) {
return COMPONENT_REGISTRY.get(name);
}
/**
* Get all registered components
*/
export function getRegisteredComponents() {
return new Map(COMPONENT_REGISTRY);
}
/**
* Create a higher-order component
*/
export function createHOC(enhancer) {
return (WrappedComponent) => {
return defineComponent({
name: `HOC(${WrappedComponent.componentName || 'Component'})`,
render(props) {
return enhancer(WrappedComponent, props);
}
});
};
}
/**
* Mixin functionality
*/
export function createMixin(mixin) {
return (componentDefinition) => {
return {
...mixin,
...componentDefinition,
// Merge methods
methods: {
...mixin.methods,
...componentDefinition.methods
},
// Merge computed
computed: {
...mixin.computed,
...componentDefinition.computed
},
// Merge watchers
watch: {
...mixin.watch,
...componentDefinition.watch
},
// Merge state
state: {
...mixin.state,
...componentDefinition.state
}
};
};
}
/**
* Component composition utilities
*/
export const compose = {
/**
* Combine multiple components
*/
combine: (...components) => {
return defineComponent({
name: 'ComposedComponent',
render(props) {
return components.map(comp =>
typeof comp === 'function' ? comp(props) : comp
);
}
});
},
/**
* Conditionally render components
*/
conditional: (condition, trueComponent, falseComponent = null) => {
return defineComponent({
name: 'ConditionalComponent',
render(props) {
const shouldRender = typeof condition === 'function' ?
condition(props) : condition;
if (shouldRender) {
return typeof trueComponent === 'function' ?
trueComponent(props) : trueComponent;
} else if (falseComponent) {
return typeof falseComponent === 'function' ?
falseComponent(props) : falseComponent;
}
return null;
}
});
},
/**
* Loop over data to render components
*/
loop: (data, itemComponent, keyFn = (item, index) => index) => {
return defineComponent({
name: 'LoopComponent',
render(props) {
const items = typeof data === 'function' ? data(props) : data;
if (!Array.isArray(items)) {
console.warn('Loop component expects array data');
return null;
}
return items.map((item, index) => {
const key = keyFn(item, index);
const itemProps = {...props, item, index, key};
return typeof itemComponent === 'function' ?
itemComponent(itemProps) : itemComponent;
});
}
});
}
};
/**
* Component utilities
*/
export const componentUtils = {
/**
* Get component tree information
*/
getComponentTree: (component) => {
const tree = {
name: component.name || 'Unknown',
props: component.props || {},
state: component.state ? component.state.get() : {},
children: [],
metadata: component.getMetadata ? component.getMetadata() : {}
};
if (component.children && component.children.length > 0) {
tree.children = component.children.map(child =>
componentUtils.getComponentTree(child)
);
}
return tree;
},
/**
* Find component by name in tree
*/
findComponent: (component, name) => {
if (component.name === name) {
return component;
}
if (component.children) {
for (const child of component.children) {
const found = componentUtils.findComponent(child, name);
if (found) return found;
}
}
return null;
},
/**
* Get component performance metrics
*/
getPerformanceMetrics: (component) => {
const metadata = component.getMetadata ? component.getMetadata() : {};
return {
renderCount: metadata.renderCount || 0,
updateCount: metadata.updateCount || 0,
createdAt: metadata.createdAt || Date.now(),
age: Date.now() - (metadata.createdAt || Date.now())
};
},
/**
* Validate component definition
*/
validateDefinition: (definition) => {
const errors = [];
if (!definition || typeof definition !== 'object') {
errors.push('Definition must be an object');
return errors;
}
if (!definition.render && !definition.template) {
errors.push('Component must have either render method or template');
}
if (definition.render && typeof definition.render !== 'function') {
errors.push('render must be a function');
}
if (definition.methods && typeof definition.methods !== 'object') {
errors.push('methods must be an object');
}
if (definition.computed && typeof definition.computed !== 'object') {
errors.push('computed must be an object');
}
if (definition.watch && typeof definition.watch !== 'object') {
errors.push('watch must be an object');
}
return errors;
}
};
/**
* Performance monitoring for components
*/
if (performanceMonitor) {
const originalRender = Component.prototype.render;
Component.prototype.render = function(...args) {
const start = performance.now();
const result = originalRender.apply(this, args);
const duration = performance.now() - start;
performanceMonitor.recordRender('component', duration, {
name: this.name,
propsSize: JSON.stringify(this.props || {}).length,
hasState: Object.keys(this.state?.get() || {}).length > 0
});
return result;
};
}
/**
* Development helpers
*/
export const dev = {
/**
* Get all component instances
*/
getAllComponents: () => {
return Array.from(COMPONENT_REGISTRY.entries()).map(([name, factory]) => ({
name,
factory,
definition: factory.definition
}));
},
/**
* Clear component registry
*/
clearRegistry: () => {
COMPONENT_REGISTRY.clear();
},
/**
* Get component registry stats
*/
getRegistryStats: () => ({
totalComponents: COMPONENT_REGISTRY.size,
components: Array.from(COMPONENT_REGISTRY.keys())
})
};
/**
* Create lazy-evaluated properties and components
* Defers computation until actually needed, with optional caching
*/
export function lazy(factory, options = {}) {
const {
cache = true, // Cache the result after first evaluation
timeout = null, // Optional timeout for evaluation
fallback = null, // Fallback value if evaluation fails
onError = null, // Error handler
dependencies = [] // Dependencies that invalidate cache
} = options;
let cached = false;
let cachedValue = null;
let isEvaluating = false;
let lastDependencyHash = null;
const lazyWrapper = {
// Mark as lazy for identification
__isLazy: true,
__factory: factory,
__options: options,
// Evaluation method
evaluate(...args) {
// Prevent recursive evaluation
if (isEvaluating) {
console.warn('Lazy evaluation cycle detected, returning fallback');
return fallback;
}
// Check dependency changes
if (cache && dependencies.length > 0) {
const currentHash = hashDependencies(dependencies);
if (lastDependencyHash !== null && lastDependencyHash !== currentHash) {
cached = false;
cachedValue = null;
}
lastDependencyHash = currentHash;
}
// Return cached value if available
if (cache && cached) {
return cachedValue;
}
isEvaluating = true;
try {
let result;
// Handle timeout
if (timeout) {
result = evaluateWithTimeout(factory, timeout, args, fallback);
} else {
result = typeof factory === 'function' ? factory(...args) : factory;
}
// Handle promises
if (result && typeof result.then === 'function') {
return result.catch(error => {
if (onError) onError(error);
return fallback;
});
}
// Cache successful result
if (cache) {
cached = true;
cachedValue = result;
}
return result;
} catch (error) {
if (onError) {
onError(error);
} else {
console.error('Lazy evaluation error:', error);
}
return fallback;
} finally {
isEvaluating = false;
}
},
// Force re-evaluation
invalidate() {
cached = false;
cachedValue = null;
lastDependencyHash = null;
return this;
},
// Check if evaluated
isEvaluated() {
return cached;
},
// Get cached value without evaluation
getCachedValue() {
return cachedValue;
},
// Transform the lazy value
map(transform) {
return lazy((...args) => {
const value = this.evaluate(...args);
return transform(value);
}, {...options, cache: false}); // Don't double-cache
},
// Chain lazy evaluations
flatMap(transform) {
return lazy((...args) => {
const value = this.evaluate(...args);
const transformed = transform(value);
if (isLazy(transformed)) {
return transformed.evaluate(...args);
}
return transformed;
}, {...options, cache: false});
},
// Convert to string for debugging
toString() {
return `[Lazy${cached ? ' (cached)' : ''}]`;
},
// JSON serialization
toJSON() {
return this.evaluate();
}
};
return lazyWrapper;
}
/**
* Check if value is lazy
*/
export function isLazy(value) {
return value && typeof value === 'object' && value.__isLazy === true;
}
/**
* Evaluate lazy values recursively in an object
*/
export function evaluateLazy(obj, ...args) {
if (isLazy(obj)) {
return obj.evaluate(...args);
}
if (Array.isArray(obj)) {
return obj.map(item => evaluateLazy(item, ...args));
}
if (obj && typeof obj === 'object') {
const result = {};
for (const [key, value] of Object.entries(obj)) {
result[key] = evaluateLazy(value, ...args);
}
return result;
}
return obj;
}
/**
* Create lazy component
*/
export function lazyComponent(componentFactory, options = {}) {
return lazy(componentFactory, {
cache: true,
fallback: {div: {text: 'Loading component...'}},
...options
});
}
/**
* Create lazy import for dynamic imports
*/
export function lazyImport(importPromise, options = {}) {
return lazy(async () => {
const module = await importPromise;
return module.default || module;
}, {
cache: true,
fallback: {div: {text: 'Loading...'}},
...options
});
}
/**
* Create lazy computed property
*/
export function lazyComputed(computeFn, dependencies = [], options = {}) {
return lazy(computeFn, {
cache: true,
dependencies,
...options
});
}
/**
* Batch evaluate multiple lazy values
*/
export function batchEvaluate(lazyValues, ...args) {
const results = {};
const promises = [];
Object.entries(lazyValues).forEach(([key, lazyValue]) => {
if (isLazy(lazyValue)) {
const result = lazyValue.evaluate(...args);
if (result && typeof result.then === 'function') {
promises.push(
result.then(value => ({key, value}))
.catch(error => ({key, error}))
);
} else {
results[key] = result;
}
} else {
results[key] = lazyValue;
}
});
if (promises.length === 0) {
return results;
}
return Promise.all(promises).then(asyncResults => {
asyncResults.forEach(({key, value, error}) => {
if (error) {
console.error(`Batch evaluation error for ${key}:`, error);
results[key] = null;
} else {
results[key] = value;
}
});
return results;
});
}
/**
* Helper function to hash dependencies
*/
function hashDependencies(dependencies) {
return dependencies.map(dep => {
if (typeof dep === 'function') {
return dep.toString();
}
return JSON.stringify(dep);
}).join('|');
}
/**
* Helper function to evaluate with timeout
*/
function evaluateWithTimeout(factory, timeout, args, fallback) {
return new Promise((resolve, reject) => {
const timer = setTimeout(() => {
reject(new Error(`Lazy evaluation timeout after ${timeout}ms`));
}, timeout);
try {
const result = factory(...args);
if (result && typeof result.then === 'function') {
result
.then(value => {
clearTimeout(timer);
resolve(value);
})
.catch(error => {
clearTimeout(timer);
reject(error);
});
} else {
clearTimeout(timer);
resolve(result);
}
} catch (error) {
clearTimeout(timer);
reject(error);
}
}).catch(() => fallback);
}
/**
* Lazy evaluation utilities
*/
export const lazyUtils = {
/**
* Create a lazy chain of transformations
*/
chain: (...transformations) => {
return lazy((initialValue) => {
return transformations.reduce((value, transform) => {
if (isLazy(value)) {
value = value.evaluate();
}
return transform(value);
}, initialValue);
});
},
/**
* Create conditional lazy evaluation
*/
conditional: (condition, trueFactory, falseFactory) => {
return lazy((...args) => {
const shouldEvaluateTrue = typeof condition === 'function' ?
condition(...args) : condition;
const factory = shouldEvaluateTrue ? trueFactory : falseFactory;
return typeof factory === 'function' ? factory(...args) : factory;
});
},
/**
* Memoize a function with lazy evaluation
*/
memoize: (fn, keyFn = (...args) => JSON.stringify(args)) => {
const cache = new Map();
return lazy((...args) => {
const key = keyFn(...args);
if (cache.has(key)) {
return cache.get(key);
}
const result = fn(...args);
cache.set(key, result);
return result;
}, {cache: false}); // Handle caching internally
},
/**
* Create lazy value from async function
*/
async: (asyncFn, options = {}) => {
return lazy(asyncFn, {
cache: true,
fallback: options.loading || {div: {text: 'Loading...'}},
onError: options.onError,
...options
});
},
/**
* Create lazy array with lazy items
*/
array: (items = []) => {
return lazy(() => items.map(item =>
isLazy(item) ? item.evaluate() : item
));
},
/**
* Create lazy object with lazy properties
*/
object: (obj = {}) => {
return lazy(() => {
const result = {};
for (const [key, value] of Object.entries(obj)) {
result[key] = isLazy(value) ? value.evaluate() : value;
}
return result;
});
}
};
/**
* Memoization utilities for caching function results and component renders
*/
/**
* Enhanced memoization with multiple caching strategies
*/
export function memo(fn, options = {}) {
const {
// Caching strategy
strategy = 'lru', // 'lru', 'ttl', 'weak', 'simple'
maxSize = 100, // Maximum cache entries
ttl = null, // Time to live in milliseconds
// Key generation
keyFn = null, // Custom key function
keySerializer = JSON.stringify, // Default serialization
// Comparison
// eslint-disable-next-line no-unused-vars
compareFn = null, // Custom equality comparison
// eslint-disable-next-line no-unused-vars
shallow = false, // Shallow comparison for objects
// Lifecycle hooks
onHit = null, // Called on cache hit
onMiss = null, // Called on cache miss
onEvict = null, // Called when item evicted
// Performance
stats = false, // Track hit/miss statistics
// Development
debug = false // Debug logging
} = options;
// Choose cache implementation based on strategy
let cache;
const stats_data = stats ? {hits: 0, misses: 0, evictions: 0} : null;
switch (strategy) {
case 'lru':
cache = new LRUCache(maxSize, {onEvict: onEvict});
break;
case 'ttl':
cache = new TTLCache(ttl, {onEvict: onEvict});
break;
case 'weak':
cache = new WeakMap();
break;
default:
cache = new Map();
}
// Generate cache key
const generateKey = keyFn || ((...args) => {
if (args.length === 0) return '__empty__';
if (args.length === 1) return keySerializer(args[0]);
return keySerializer(args);
});
// Compare values for equality (inline via compareFn or defaults where used)
const memoizedFn = (...args) => {
const key = generateKey(...args);
// Check cache hit
if (cache.has(key)) {
const cached = cache.get(key);
// For TTL cache or custom validation
if (cached && (!cached.expires || Date.now() < cached.expires)) {
if (debug) console.log(`Memo cache hit for key: ${key}`);
if (onHit) onHit(key, cached.value, args);
if (stats_data) stats_data.hits++;
return cached.value || cached;
} else {
// Expired entry
cache.delete(key);
}
}
// Cache miss - compute result
if (debug) console.log(`Memo cache miss for key: ${key}`);
if (onMiss) onMiss(key, args);
if (stats_data) stats_data.misses++;
const result = fn(...args);
// Store in cache
const cacheEntry = ttl ?
{value: result, expires: Date.now() + ttl} :
result;
cache.set(key, cacheEntry);
return result;
};
// Attach utility methods
memoizedFn.cache = cache;
memoizedFn.clear = () => cache.clear();
memoizedFn.delete = (key) => cache.delete(key);
memoizedFn.has = (key) => cache.has(key);
memoizedFn.size = () => cache.size;
if (stats_data) {
memoizedFn.stats = () => ({...stats_data});
memoizedFn.resetStats = () => {
stats_data.hits = 0;
stats_data.misses = 0;
stats_data.evictions = 0;
};
}
// Force recomputation for specific args
memoizedFn.refresh = (...args) => {
const key = generateKey(...args);
cache.delete(key);
return memoizedFn(...args);
};
return memoizedFn;
}
/**
* Component-specific memoization
*/
export function memoComponent(component, options = {}) {
const {
propsEqual = shallowEqual,
stateEqual = shallowEqual,
name = component.name || 'AnonymousComponent'
} = options;
return memo((props = {}, state = {}, context = {}) => {
return typeof component === 'function' ?
component(props, state, context) :
component;
}, {
keyFn: (props, state) => {
// Create key based on props and state
return `${name}:${JSON.stringify(props)}:${JSON.stringify(state)}`;
},
compareFn: (a, b) => {
// Custom comparison for component args
return propsEqual(a.props, b.props) &&
stateEqual(a.state, b.state);
},
...options
});
}
/**
* Async memoization with promise caching
*/
export function memoAsync(asyncFn, options = {}) {
const promiseCache = new Map();
const memoized = memo((...args) => {
const key = options.keyFn ?
options.keyFn(...args) :
JSON.stringify(args);
// Check if promise is already running
if (promiseCache.has(key)) {
return promiseCache.get(key);
}
// Start new async operation
const promise = asyncFn(...args).catch(error => {
// Remove failed promise from cache
promiseCache.delete(key);
throw error;
});
promiseCache.set(key, promise);
// Clean up resolved promise
promise.finally(() => {
setTimeout(() => promiseCache.delete(key), 0);
});
return promise;
}, options);
// Clear both caches
const originalClear = memoized.clear;
memoized.clear = () => {
originalClear();
promiseCache.clear();
};
return memoized;
}
/**
* LRU Cache implementation
*/
class LRUCache {
constructor(maxSize = 100, options = {}) {
this.maxSize = maxSize;
this.cache = new Map();
this.onEvict = options.onEvict;
}
get(key) {
if (this.cache.has(key)) {
// Move to end (most recently used)
const value = this.cache.get(key);
this.cache.delete(key);
this.cache.set(key, value);
return value;
}
return undefined;
}
set(key, value) {
if (this.cache.has(key)) {
// Update existing
this.cache.delete(key);
} else if (this.cache.size >= this.maxSize) {
// Evict least recently used (first entry)
const firstKey = this.cache.keys().next().value;
const evicted = this.cache.get(firstKey);
this.cache.delete(firstKey);
if (this.onEvict) {
this.onEvict(firstKey, evicted);
}
}
this.cache.set(key, value);
}
has(key) {
return this.cache.has(key);
}
delete(key) {
return this.cache.delete(key);
}
clear() {
this.cache.clear();
}
get size() {
return this.cache.size;
}
}
/**
* TTL Cache implementation
*/
class TTLCache {
constructor(ttl, options = {}) {
this.ttl = ttl;
this.cache = new Map();
this.timers = new Map();
this.onEvict = options.onEvict;
}
get(key) {
if (this.cache.has(key)) {
const entry = this.cache.get(key);
if (Date.now() < entry.expires) {
return entry.value;
} else {
// Expired
this.delete(key);
}
}
return undefined;
}
set(key, value) {
// Clear existing timer
if (this.timers.has(key)) {
clearTimeout(this.timers.get(key));
}
const expires = Date.now() + this.ttl;
this.cache.set(key, {value, expires});
// Set expiration timer
const timer = setTimeout(() => {
this.delete(key);
}, this.ttl);
this.timers.set(key, timer);
}
has(key) {
if (this.cache.has(key)) {
const entry = this.cache.get(key);
return Date.now() < entry.expires;
}
return false;
}
delete(key) {
const had = this.cache.has(key);
if (had) {
const entry = this.cache.get(key);
this.cache.delete(key);
if (this.timers.has(key)) {
clearTimeout(this.timers.get(key));
this.timers.delete(key);
}
if (this.onEvict) {
this.onEvict(key, entry.value);
}
}
return had;
}
clear() {
// Clear all timers
this.timers.forEach(timer => clearTimeout(timer));
this.timers.clear();
this.cache.clear();
}
get size() {
return this.cache.size;
}
}
/**
* Shallow equality check for objects
*/
function shallowEqual(a, b) {
if (a === b) return true;
if (!a || !b) return false;
if (typeof a !== typeof b) return false;
if (Array.isArray(a) && Array.isArray(b)) {
if (a.length !== b.length) return false;
return a.every((item, index) => item === b[index]);
}
if (typeof a === 'object') {
const keysA = Object.keys(a);
const keysB = Object.keys(b);
if (keysA.length !== keysB.length) return false;
return keysA.every(key => a[key] === b[key]);
}
return false;
}
/**
* Memoization utilities
*/
export const memoUtils = {
/**
* Create a memo with automatic dependency tracking
*/
auto: (fn, dependencies = []) => {
let lastDeps = null;
let cached = null;
let hasCached = false;
return (...args) => {
const currentDeps = dependencies.map(dep =>
typeof dep === 'function' ? dep() : dep
);
if (!hasCached || !shallowEqual(lastDeps, currentDeps)) {
cached = fn(...args);
lastDeps = currentDeps;
hasCached = true;
}
return cached;
};
},
/**
* Memo with size-based eviction
*/
sized: (fn, maxSize = 50) => memo(fn, {strategy: 'lru', maxSize}),
/**
* Memo with time-based eviction
*/
timed: (fn, ttl = 5000) => memo(fn, {strategy: 'ttl', ttl}),
/**
* Weak memo (garbage collected with keys)
*/
weak: (fn) => memo(fn, {strategy: 'weak'}),
/**
* Create multiple memoized variants
*/
variants: (fn, configs) => {
const variants = {};
Object.entries(configs).forEach(([name, config]) => {
variants[name] = memo(fn, config);
});
return variants;
},
/**
* Conditional memoization
*/
conditional: (fn, shouldMemo = () => true) => {
const memoized = memo(fn);
return (...args) => {
if (shouldMemo(...args)) {
return memoized(...args);
}
return fn(...args);
};
},
/**
* Memo with custom storage
*/
custom: (fn, storage) => {
return (...args) => {
const key = JSON.stringify(args);
if (storage.has(key)) {
return storage.get(key);
}
const result = fn(...args);
storage.set(key, result);
return result;
};
}
};
/**
* Higher-order function utilities for component composition and prop manipulation
*/
/**
* Enhanced withProps utility for component prop transformation and injection
*/
export function withProps(propsTransform, options = {}) {
const {
// Transformation options
merge = true, // Merge with existing props vs replace
override = false, // Allow overriding existing props
validate = null, // Validation function for props
// Caching and performance
memoize = false, // Memoize the transformation
memoOptions = {}, // Memoization options
// Error handling
onError = null, // Error handler for transformation
fallbackProps = {}, // Fallback props on error
// Development
displayName = null, // Component name for debugging
debug = false, // Debug logging
// Lifecycle
onPropsChange = null, // Called when props change
shouldUpdate = null // Custom update logic
} = options;
return function withPropsHOC(WrappedComponent) {
// Create the enhanced component
function WithPropsComponent(originalProps = {}, state = {}, context = {}) {
try {
// Transform props
let transformedProps;
if (typeof propsTransform === 'function') {
transformedProps = propsTransform(originalProps, state, context);
} else if (typeof propsTransform === 'object') {
transformedProps = propsTransform;
} else {
transformedProps = {};
}
// Handle async transformations
if (transformedProps && typeof transformedProps.then === 'function') {
return transformedProps.then(resolved => {
return processProps(resolved, originalProps, WrappedComponent, state, context);
}).catch(error => {
if (onError) onError(error, originalProps);
return processProps(fallbackProps, originalProps, WrappedComponent, state, context);
});
}
return processProps(transformedProps, originalProps, WrappedComponent, state, context);
} catch (error) {
if (debug) console.error('withProps error:', error);
if (onError) onError(error, originalProps);
// Use fallback props
return processProps(fallbackProps, originalProps, WrappedComponent, state, context);
}
}
// Process and merge props
function processProps(transformed, original, component, state, context) {
let finalProps;
if (merge) {
if (override) {
finalProps = {...original, ...transformed};
} else {
// Don't override existing props
finalProps = {...transformed, ...original};
}
} else {
finalProps = transformed;
}
// Validate final props
if (validate && !validate(finalProps)) {
if (debug) console.warn('Props validation failed:', finalProps);
finalProps = {...finalProps, ...fallbackProps};
}
// Check if should update
if (shouldUpdate && !shouldUpdate(finalProps, original, state)) {
return null; // Skip update
}
// Notify props change
if (onPropsChange) {
onPropsChange(finalProps, original, transformed);
}
if (debug) {
console.log('withProps transformation:', {
original,
transformed,
final: finalProps
});
}
// Render wrapped component
return typeof component === 'function' ?
component(finalProps, state, context) :
component;
}
// Set display name for debugging
WithPropsComponent.displayName = displayName ||
`withProps(${WrappedComponent.displayName || WrappedComponent.name || 'Component'})`;
// Add metadata
WithPropsComponent.__isHOC = true;
WithPropsComponent.__wrappedComponent = WrappedComponent;
WithPropsComponent.__transform = propsTransform;
// Apply memoization if requested
if (memoize) {
return memo(WithPropsComponent, {
keyFn: (props, state) => JSON.stringify({props, state}),
...memoOptions
});
}
return WithPropsComponent;
};
}
/**
* Specialized withProps variants
*/
export const withPropsUtils = {
/**
* Add static props to component
*/
static: (staticProps) => withProps(() => staticProps),
/**
* Transform props based on conditions
*/
conditional: (condition, trueProps, falseProps = {}) =>
withProps((props, state, context) => {
const shouldApply = typeof condition === 'function' ?
condition(props, state, context) :
condition;
return shouldApply ? trueProps : falseProps;
}),
/**
* Map specific props to new names/values
*/
map: (mapping) => withProps((props) => {
const result = {};
Object.entries(mapping).forEach(([newKey, mapper]) => {
if (typeof mapper === 'string') {
// Simple property rename
result[newKey] = props[mapper];
} else if (typeof mapper === 'function') {
// Transform function
result[newKey] = mapper(props);
} else {
// Static value
result[newKey] = mapper;
}
});
return result;
}),
/**
* Pick only specific props
*/
pick: (keys) => withProps((props) => {
const result = {};
keys.forEach(key => {
if (props.hasOwnProperty(key)) {
result[key] = props[key];
}
});
return result;
}),
/**
* Omit specific props
*/
omit: (keys) => withProps((props) => {
const result = {...props};
keys.forEach(key => delete result[key]);
return result;
}),
/**
* Default values for missing props
*/
defaults: (defaultProps) => withProps((props) => ({
...defaultProps,
...props
}), {merge: false}),
/**
* Transform props with validation
*/
validated: (transform, validator) => withProps(transform, {
validate: validator,
onError: (error) => console.warn('Prop validation failed:', error)
}),
/**
* Async prop transformation
*/
async: (asyncTransform, loadingProps = {}) => withProps(async (props, state, context) => {
try {
return await asyncTransform(props, state, context);
} catch (error) {
console.error('Async prop transform failed:', error);
return loadingProps;
}
}, {
fallbackProps: loadingProps
}),
/**
* Computed props based on other props
*/
computed: (computedProps) => withProps((props) => {
const computed = {};
Object.entries(computedProps).forEach(([key, compute]) => {
computed[key] = typeof compute === 'function' ?
compute(props) :
compute;
});
return computed;
}),
/**
* Props with context injection
*/
withContext: (contextKeys) => withProps((props, state, context) => {
const contextProps = {};
contextKeys.forEach(key => {
if (context && context[key] !== undefined) {
contextProps[key] = context[key];
}
});
return contextProps;
}),
/**
* Props with state injection
*/
withState: (stateMapping) => withProps((props, state) => {
if (typeof stateMapping === 'function') {
return stateMapping(state, props);
}
const stateProps = {};
Object.entries(stateMapping).forEach(([propKey, stateKey]) => {
stateProps[propKey] = state[stateKey];
});
return stateProps;
}),
/**
* Memoized prop transformation
*/
memoized: (transform, memoOptions = {}) => withProps(transform, {
memoize: true,
memoOptions: {
maxSize: 50,
...memoOptions
}
}),
/**
* Props with performance measurement
*/
timed: (transform, name = 'PropTransform') => withProps((props, state, context) => {
const start = performance.now();
const result = transform(props, state, context);
const end = performance.now();
if (end - start > 1) { // Log if > 1ms
console.log(`${name} took ${(end - start).toFixed(2)}ms`);
}
return result;
}),
/**
* Chain multiple prop transformations
*/
chain: (...transforms) => withProps((props, state, context) => {
return transforms.reduce((acc, transform) => {
if (typeof transform === 'function') {
return {...acc, ...transform(acc, state, context)};
}
return {...acc, ...transform};
}, props);
})
};
/**
* Create a reusable prop transformer
*/
export function createPropTransformer(config) {
const {
transforms = [],
validators = [],
defaults = {},
options = {}
} = config;
return withProps((props, state, context) => {
let result = {...defaults, ...props};
// Apply transforms in sequence
for (const transform of transforms) {
if (typeof transform === 'function') {
result = {...result, ...transform(result, state, context)};
} else {
result = {...result, ...transform};
}
}
// Run validators
for (const validator of validators) {
if (!validator(result)) {
throw new Error('Prop validation failed');
}
}
return result;
}, options);
}
/**
* Props debugging utility
*/
export function withPropsDebug(component, debugOptions = {}) {
const {
logProps = true,
logChanges = true,
breakOnError = false
} = debugOptions;
return withProps((props, state, context) => {
if (logProps) {
console.group(`Props Debug: ${component.name || 'Component'}`);
console.log('Props:', props);
console.log('State:', state);
console.log('Context:', context);
console.groupEnd();
}
return props;
}, {
debug: true,
onError: breakOnError ? () => {
// eslint-disable-next-line no-debugger
debugger;
} : undefined,
onPropsChange: logChanges ? (finalProps, original) => {
console.log('Props changed:', {from: original, to: finalProps});
} : undefined
})(component);
}
/**
* State management utilities for component state injection and management
*/
/**
* Enhanced withState utility for component state management and injection
*/
export function withState(initialState = {}, options = {}) {
const {
// State options
persistent = false, // Persist state across component unmounts
storageKey = null, // Key for persistent storage
storage = typeof localStorage !== 'undefined' ? localStorage : {
// Fallback storage for Node.js environments
_data: new Map(),
setItem(key, value) { this._data.set(key, value); },
getItem(key) { return this._data.get(key) || null; },
removeItem(key) { this._data.delete(key); },
clear() { this._data.clear(); }
}, // Storage mechanism
// State transformation
stateTransform = null, // Transform state before injection
propName = 'state', // Prop name for state injection
actionsName = 'actions', // Prop name for action injection
// Reducers and actions
reducer = null, // State reducer function
actions = {}, // Action creators
middleware = [], // State middleware
// Performance
memoizeState = false, // Memoize state transformations
// eslint-disable-next-line no-unused-vars
shallow = false, // Shallow state comparison
// Development
// eslint-disable-next-line no-unused-vars
devTools = false, // Connect to dev tools
debug = false, // Debug logging
displayName = null, // Component name for debugging
// Lifecycle hooks
onStateChange = null, // Called when state changes
onMount = null, // Called when component mounts
onUnmount = null, // Called when component unmounts
// Validation
validator = null, // State validator function
// Async state
supportAsync = false // Support async state updates
} = options;
return function withStateHOC(WrappedComponent) {
// Create state container
const stateContainer = createStateContainer(initialState, {
persistent,
storageKey: storageKey || `${getComponentName(WrappedComponent)}_state`,
storage,
reducer,
middleware,
validator,
onStateChange,
debug
});
function WithStateComponent(props = {}, globalState = {}, context = {}) {
// Initialize component state if not exists
if (!stateContainer.initialized) {
stateContainer.initialize();
if (onMount) {
onMount(stateContainer.getState(), props, context);
}
}
// Get current state
const currentState = stateContainer.getState();
// Transform state if needed
let transformedState = currentState;
if (stateTransform) {
transformedState = stateTransform(currentState, props, context);
}
// Create actions bound to this state container
const boundActions = createBoundActions(actions, stateContainer, {
props,
context,
supportAsync,
debug
});
// Create state management utilities
const stateUtils = {
// Basic state operations
setState: stateContainer.setState.bind(stateContainer),
getState: stateContainer.getState.bind(stateContainer),
resetState: () => stateContainer.setState(initialState),
// Advanced operations
updateState: (updater) => {
const current = stateContainer.getState();
const next = typeof updater === 'function' ? updater(current) : updater;
stateContainer.setState(next);
},
// Batch updates
batchUpdate: (updates) => {
stateContainer.batch(() => {
updates.forEach(update => {
if (typeof update === 'function') {
update(stateContainer);
} else {
stateContainer.setState(update);
}
});
});
},
// Computed state
computed: (computeFn) => {
return memoizeState ?
memo(computeFn)(transformedState) :
computeFn(transformedState);
},
// State subscription
subscribe: stateContainer.subscribe.bind(stateContainer),
unsubscribe: stateContainer.unsubscribe.bind(stateContainer),
// Async state operations
...(supportAsync && {
setStateAsync: async (stateOrPromise) => {
const resolved = await Promise.resolve(stateOrPromise);
stateContainer.setState(resolved);
},
updateStateAsync: async (asyncUpdater) => {
const current = stateContainer.getState();
const next = await Promise.resolve(asyncUpdater(current));
stateContainer.setState(next);
}
})
};
// Prepare enhanced props
const enhancedProps = {
...props,
[propName]: transformedState,
[actionsName]: boundActions,
stateUtils
};
if (debug) {
console.log('withState render:', {
component: getComponentName(WrappedComponent),
state: transformedState,
props: enhancedProps
});
}
// Render wrapped component
return typeof WrappedComponent === 'function' ?
WrappedComponent(enhancedProps, globalState, context) :
WrappedComponent;
}
// Set display name
WithStateComponent.displayName = displayName ||
`withState(${getComponentName(WrappedComponent)})`;
// Add metadata
WithStateComponent.__isHOC = true;
WithStateComponent.__hasState = true;
WithStateComponent.__stateContainer = stateContainer;
WithStateComponent.__wrappedComponent = WrappedComponent;
// Cleanup on unmount
WithStateComponent.cleanup = () => {
if (onUnmount) {
onUnmount(stateContainer.getState());
}
if (!persistent) {
stateContainer.destroy();
}
};
return WithStateComponent;
};
}
/**
* Create a centralized state container
*/
function createStateContainer(initialState, options) {
const {
persistent,
storageKey,
storage,
reducer,
middleware,
validator,
onStateChange,
debug
} = options;
let state = deepClone(initialState);
let listeners = new Set();
const middlewareStack = [...middleware];
const container = {
initialized: false,
initialize() {
// Load persisted state
if (persistent && storageKey) {
try {
const saved = storage.getItem(storageKey);
if (saved) {
const parsed = JSON.parse(saved);
state = {...state, ...parsed};
}
} catch (error) {
if (debug) console.warn('Failed to load persisted state:', error);
}
}
container.initialized = true;
},
getState() {
return deepClone(state);
},
setState(newState) {
const prevState = state;
// Apply reducer if provided
if (reducer) {
state = reducer(state, {type: 'SET_STATE', payload: newState});
} else {
state = typeof newState === 'function' ?
newState(state) :
{...state, ...newState};
}
// Validate state
if (validator && !validator(state)) {
if (debug) console.warn('State validation failed, reverting:', state);
state = prevState;
return false;
}
// Apply middleware
state = middlewareStack.reduce((acc, middleware) =>
middleware(acc, prevState) || acc, state
);
// Persist state
if (persistent && storageKey) {
try {
storage.setItem(storageKey, JSON.stringify(state));
} catch (error) {
if (debug) console.warn('Failed to persist state:', error);
}
}
// Notify listeners
if (state !== prevState) {
listeners.forEach(listener => {
try {
listener(state, prevState);
} catch (error) {
if (debug) console.error('State listener error:', error);
}
});
if (onStateChange) {
onStateChange(state, prevState);
}
}
return true;
},
subscribe(listener) {
listeners.add(listener);
return () => listeners.delete(listener);
},
unsubscribe(listener) {
return listeners.delete(listener);
},
batch(batchFn) {
const originalListeners = listeners;
listeners = new Set(); // Temporarily disable listeners
try {
batchFn();
} finally {
listeners = originalListeners;
// Notify once after batch
listeners.forEach(listener => listener(state));
}
},
destroy() {
listeners.clear();
if (persistent && storageKey) {
try {
storage.removeItem(storageKey);
} catch (error) {
if (debug) console.warn('Failed to remove persisted state:', error);
}
}
}
};
return container;
}
/**
* Create bound action creators
*/
function createBoundActions(actions, stateContainer, options) {
const {props, context, supportAsync, debug} = options;
const boundActions = {};
Object.entries(actions).forEach(([actionName, actionCreator]) => {
boundActions[actionName] = (...args) => {
try {
const result = actionCreator(
stateContainer.getState(),
stateContainer.setState.bind(stateContainer),
{props, context, args}
);
// Handle async actions
if (supportAsync && result && typeof result.then === 'function') {
return result.catch(error => {
if (debug) console.error(`Async action ${actionName} failed:`, error);
throw error;
});
}
return result;
} catch (error) {
if (debug) console.error(`Action ${actionName} failed:`, error);
throw error;
}
};
});
return boundActions;
}
/**
* Specialized withState variants
*/
export const withStateUtils = {
/**
* Simple local state
*/
local: (initialState) => withState(initialState),
/**
* Persistent state with localStorage
*/
persistent: (initialState, key) => withState(initialState, {
persistent: true,
storageKey: key
}),
/**
* State with reducer pattern
*/
reducer: (initialState, reducer, actions = {}) => withState(initialState, {
reducer,
actions
}),
/**
* Async state management
*/
async: (initialState, asyncActions = {}) => withState(initialState, {
supportAsync: true,
actions: asyncActions
}),
/**
* State with validation
*/
validated: (initialState, validator) => withState(initialState, {
validator,
debug: true
}),
/**
* Shared state across components
*/
shared: (initialState, sharedKey) => {
const sharedStates = withStateUtils._shared || (withStateUtils._shared = new Map());
if (!sharedStates.has(sharedKey)) {
sharedStates.set(sharedKey, createStateContainer(initialState, {}));
}
return (WrappedComponent) => {
const sharedContainer = sharedStates.get(sharedKey);
function SharedStateComponent(props, globalState, context) {
const currentState = sharedContainer.getState();
const enhancedProps = {
...props,
state: currentState,
setState: sharedContainer.setState.bind(sharedContainer),
subscribe: sharedContainer.subscribe.bind(sharedContainer)
};
return typeof WrappedComponent === 'function' ?
WrappedComponent(enhancedProps, globalState, context) :
WrappedComponent;
}
SharedStateComponent.displayName = `withSharedState(${getComponentName(WrappedComponent)})`;
return SharedStateComponent;
};
},
/**
* State with form utilities
*/
form: (initialFormState) => withState(initialFormState, {
actions: {
updateField: (state, setState, {args: [field, value]}) => {
setState({[field]: value});
},
updateMultiple: (state, setState, {args: [updates]}) => {
setState(updates);
},
resetForm: (state, setState) => {
setState(initialFormState);
},
validateForm: (state, setState, {args: [validator]}) => {
const errors = validator(state);
setState({_errors: errors});
return Object.keys(errors).length === 0;
}
}
}),
/**
* State with loading/error handling
*/
withLoading: async (initialState) => withState({
...initialState,
_loading: false,
_error: null
}, {
supportAsync: true,
actions: {
setLoading: (state, setState, {args: [loading]}) => {
setState({_loading: loading});
},
setError: (state, setState, {args: [error]}) => {
setState({_error: error, _loading: false});
},
clearError: (state, setState) => {
setState({_error: null});
},
asyncAction: async (state, setState, {args: [asyncFn]}) => {
setState({_loading: true, _error: null});
try {
const result = await asyncFn(state);
setState({_loading: false});
return result;
} catch (error) {
setState({_loading: false, _error: error});
throw error;
}
}
}
}),
/**
* State with undo/redo functionality
*/
withHistory: (initialState, maxHistory = 10) => {
const historyState = {
present: initialState,
past: [],
future: []
};
return withState(historyState, {
actions: {
undo: (state, setState) => {
if (state.past.length === 0) return;
const previous = state.past[state.past.length - 1];
const newPast = state.past.slice(0, state.past.length - 1);
setState({
past: newPast,
present: previous,
future: [state.present, ...state.future]
});
},
redo: (state, setState) => {
if (state.future.length === 0) return;
const next = state.future[0];
const newFuture = state.future.slice(1);
setState({
past: [...state.past, state.present],
present: next,
future: newFuture
});
},
updatePresent: (state, setState, {args: [newPresent]}) => {
setState({
past: [...state.past, state.present].slice(-maxHistory),
present: newPresent,
future: []
});
},
canUndo: (state) => state.past.length > 0,
canRedo: (state) => state.future.length > 0
}
});
},
/**
* Computed state properties
*/
computed: (initialState, computedProps) => withState(initialState, {
stateTransform: (state) => {
const computed = {};
Object.entries(computedProps).forEach(([key, computeFn]) => {
computed[key] = computeFn(state);
});
return {...state, ...computed};
},
memoizeState: true
})
};
/**
* Create a compound state manager
*/
export function createStateManager(config) {
const {
initialState = {},
reducers = {},
actions = {},
middleware = [],
plugins = []
} = config;
// Combine reducers
const rootReducer = (state, action) => {
let nextState = state;
Object.entries(reducers).forEach(([key, reducer]) => {
nextState = {
...nextState,
[key]: reducer(nextState[key], action)
};
});
return nextState;
};
// Apply plugins
const enhancedConfig = plugins.reduce(
(acc, plugin) => plugin(acc),
{initialState, reducer: rootReducer, actions, middleware}
);
return withState(enhancedConfig.initialState, {
reducer: enhancedConfig.reducer,
actions: enhancedConfig.actions,
middleware: enhancedConfig.middleware
});
}
// Utility to get component name
function getComponentName(component) {
if (!component) return 'Component';
return component.displayName ||
component.name ||
component.constructor?.name ||
'Component';
}
export default {
Component,
createComponent,
defineComponent,
registerComponent,
getComponent,
getRegisteredComponents,
createHOC,
createMixin,
compose,
componentUtils,
dev,
lazy,
lazyUtils,
evaluateLazy,
evaluateWithTimeout,
batchEvaluate,
hashDependencies,
memo,
memoUtils,
withProps,
withPropsUtils,
withPropsDebug,
withState,
createStateManager,
getComponentName,
withStateUtils
};
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