form-functionality-library/dist/modules/events.js

A modular, flexible form functionality library for Webflow forms supporting single-step, multi-step, and branching forms

/**
 * Event Emitter for decoupled module communication.
 *
 * This allows modules to communicate without direct dependencies,
 * preventing circular dependencies and improving modularity.
 */
class EventEmitter {
    constructor() {
        this.events = {};
        this.moduleStates = new Map();
    }
    /**
     * Register a module as initialized
     */
    registerModule(name) {
        this.moduleStates.set(name, { initialized: true, name });
    }
    /**
     * Unregister a module (when it's being reset)
     */
    unregisterModule(name) {
        this.moduleStates.delete(name);
    }
    /**
     * Check if a module is initialized
     */
    isModuleInitialized(name) {
        return this.moduleStates.get(name)?.initialized ?? false;
    }
    /**
     * Register an event listener.
     */
    on(event, listener) {
        if (!this.events[event]) {
            this.events[event] = [];
        }
        this.events[event].push(listener);
        // Return a function to unsubscribe
        return () => {
            this.off(event, listener);
        };
    }
    /**
     * Unregister an event listener.
     */
    off(event, listener) {
        if (!this.events[event]) {
            return;
        }
        this.events[event] = this.events[event].filter(l => l !== listener);
    }
    /**
     * Emit an event to all registered listeners with validation.
     */
    emit(event, data) {
        const eventName = String(event);
        console.log(`🔄 [FormEvents] Emitting event: ${eventName}`, {
            eventData: data,
            timestamp: new Date().toISOString(),
            hasListeners: !!this.events[event],
            listenerCount: this.events[event]?.length || 0
        });
        if (!this.events[event]) {
            console.warn(`⚠️ [FormEvents] No listeners registered for event: ${eventName}`);
            return;
        }
        // Validate that required modules are initialized for critical events
        if (event === 'skip:request' && !this.isModuleInitialized('multiStep')) {
            console.error(`❌ [FormEvents] CRITICAL: Skipping '${eventName}' event - multiStep module not initialized`, {
                eventData: data,
                registeredModules: Array.from(this.moduleStates.keys()),
                multiStepState: this.moduleStates.get('multiStep')
            });
            return;
        }
        if (event === 'branch:change' && !this.isModuleInitialized('multiStep')) {
            console.error(`❌ [FormEvents] CRITICAL: Skipping '${eventName}' event - multiStep module not initialized`, {
                eventData: data,
                registeredModules: Array.from(this.moduleStates.keys()),
                multiStepState: this.moduleStates.get('multiStep')
            });
            return;
        }
        let successCount = 0;
        let errorCount = 0;
        this.events[event].forEach((listener, index) => {
            try {
                console.log(`📡 [FormEvents] Calling listener ${index + 1}/${this.events[event].length} for ${eventName}`);
                listener(data);
                successCount++;
                console.log(`✅ [FormEvents] Listener ${index + 1} completed successfully for ${eventName}`);
            }
            catch (error) {
                errorCount++;
                console.error(`💥 [FormEvents] LISTENER ERROR ${index + 1}/${this.events[event].length} for '${eventName}':`, {
                    error: error,
                    errorMessage: error instanceof Error ? error.message : String(error),
                    errorStack: error instanceof Error ? error.stack : undefined,
                    eventData: data,
                    listenerIndex: index
                });
            }
        });
        console.log(`📊 [FormEvents] Event ${eventName} completed:`, {
            totalListeners: this.events[event].length,
            successful: successCount,
            failed: errorCount,
            eventData: data
        });
    }
}
// Create and export a singleton instance
export const formEvents = new EventEmitter();
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