waitlist-mailer/dist/types.d.ts

Modern, modular TypeScript library for managing waitlists with pluggable storage and mail providers. Supports MongoDB, SQL databases, and custom adapters with zero required dependencies for basic usage.

/**
 * @fileoverview Core types and interfaces for the waitlist-mailer library.
 * Defines contracts for storage providers, mail providers, and data structures.
 */
/**
 * Represents a single entry in the waitlist.
 * @template T - Optional metadata type for custom fields
 */
interface WaitlistEntry<T = any> {
    /** Email address */
    email: string;
    /** Custom metadata (e.g., name, referral source, etc.) */
    metadata?: T;
    /** Entry creation timestamp */
    createdAt: Date;
}
/**
 * Result of a join operation.
 */
interface JoinResult {
    success: boolean;
    message: string;
    email?: string;
}
/**
 * Storage provider interface that must be implemented by all storage adapters.
 * Allows pluggable backends (memory, MongoDB, PostgreSQL, MySQL, etc.)
 * @template T - Optional metadata type for custom fields
 */
interface StorageProvider<T = any> {
    /**
     * Optional lifecycle hook: connect to the storage backend.
     * Called during initialization if provided.
     */
    connect?(): Promise<void>;
    /**
     * Add an email to storage with optional metadata.
     * @param email - The email address to add
     * @param data - Optional custom metadata
     * @throws {Error} If email already exists or storage fails
     */
    add(email: string, data?: T): Promise<void>;
    /**
     * Remove an email from storage.
     * @param email - The email address to remove
     * @returns true if the email was found and removed, false otherwise
     */
    remove(email: string): Promise<boolean>;
    /**
     * Check if an email exists in storage.
     * @param email - The email address to check
     * @returns true if the email exists, false otherwise
     */
    exists(email: string): Promise<boolean>;
    /**
     * Retrieve all entries from storage.
     * @returns Array of WaitlistEntry objects
     */
    getAll(): Promise<WaitlistEntry<T>[]>;
    /**
     * Search entries by email pattern.
     * Delegates filtering to the storage layer for efficiency.
     * @param pattern - The pattern to search for (partial email match)
     * @param options - Optional search options
     * @returns Array of matching WaitlistEntry objects
     */
    search?(pattern: string, options?: SearchOptions): Promise<WaitlistEntry<T>[]>;
    /**
     * Iterate over entries using a cursor/stream pattern.
     * Useful for processing large datasets without loading everything into memory.
     * @param batchSize - Number of entries to fetch per batch
     * @returns AsyncIterableIterator for streaming entries
     */
    iterate?(batchSize?: number): AsyncIterableIterator<WaitlistEntry<T>>;
    /**
     * Count total entries in storage.
     */
    count(): Promise<number>;
    /**
     * Clear all entries from storage.
     */
    clear(): Promise<void>;
    /**
     * Optional lifecycle hook: disconnect from the storage backend.
     * Called during cleanup if provided.
     */
    disconnect?(): Promise<void>;
}
/**
 * Mail provider interface that must be implemented by all mail adapters.
 * Allows pluggable mail backends (Nodemailer, SendGrid, Mailgun, etc.)
 */
interface MailProvider {
    /**
     * Send a confirmation email to the specified address.
     * @param email - The recipient email address
     * @param context - Context object with template variables
     * @returns true if the email was sent successfully, false otherwise
     */
    sendConfirmation(email: string, context: Record<string, any>): Promise<boolean>;
    /**
     * Optional lifecycle hook: verify mail provider configuration.
     */
    verify?(): Promise<boolean>;
}
/**
 * Configuration options for WaitlistManager.
 * @template T - Optional metadata type for custom fields
 */
interface WaitlistManagerConfig<T = any> {
    /** * Storage provider instance.
     * Defaults to MemoryStorage if not provided.
     */
    storage?: StorageProvider<T>;
    /** Optional mail provider instance */
    mailer?: MailProvider;
    /** Optional company name for email context */
    companyName?: string;
    /** Enable automatic initialization on construction */
    autoConnect?: boolean;
}
/**
 * Email sending context passed to mail providers.
 */
interface EmailContext {
    email: string;
    companyName?: string;
    customUrl?: string;
    [key: string]: any;
}
/**
 * Options for search operations.
 */
interface SearchOptions {
    /** Maximum number of results to return */
    limit?: number;
    /** Number of results to skip (for pagination) */
    offset?: number;
    /** Whether to use case-insensitive matching (default: true) */
    caseInsensitive?: boolean;
}

export type { EmailContext, JoinResult, MailProvider, SearchOptions, StorageProvider, WaitlistEntry, WaitlistManagerConfig };