💳 Subscription Module - TypeScript Functions Documentation

/**
 * Component initialization and setup
 * Loads subscription table headers and types, initializes forms and data
 * Sets up subscription form with validators and dropdown configurations
 * @returns {void}
 */
ngOnInit(): void

/**
 * Component cleanup when destroyed
 * Closes open modals and prevents memory leaks
 * Handles resource cleanup and modal state management
 * @returns {void}
 */
ngOnDestroy(): void

/**
 * Handles subscription type change events
 * Updates billing frequency validation and form state
 * Manages subscription type-specific configurations
 * @param {string} selectedType - Selected subscription type ('1' for monthly, other for one-time)
 * @returns {void}
 */
onTypeChange(selectedType: string): void

/**
 * Toggles filter section visibility
 * Controls filter form display state and user interface
 * Manages filter panel expansion and collapse
 * @returns {void}
 */
showfilter(): void

/**
 * Resets subscription form to default state
 * Clears form data and restores initial values
 * Handles form validation reset and state cleanup
 * @returns {void}
 */
resetForm(): void

/**
 * Validates subscription form data
 * Checks required fields and business rules
 * Ensures data integrity before submission
 * @returns {boolean} Validation result
 */
validateSubscriptionForm(): boolean

/**
 * Loads subscription data from service
 * Retrieves subscription list with filtering and pagination
 * Handles data loading states and error management
 * @returns {void}
 */
loadSubscriptionData(): void

/**
 * Creates new subscription record
 * Submits subscription data to API for creation
 * Handles creation workflow and validation
 * @param {any} subscriptionData - Subscription configuration data
 * @returns {void}
 */
createSubscription(subscriptionData: any): void

/**
 * Updates existing subscription
 * Modifies subscription configuration and settings
 * Handles update workflow and validation
 * @param {string} subscriptionId - Subscription identifier
 * @param {any} updateData - Updated subscription data
 * @returns {void}
 */
updateSubscription(subscriptionId: string, updateData: any): void

/**
 * Deletes subscription record
 * Removes subscription and handles dependencies
 * Manages deletion confirmation and cleanup
 * @param {string} subscriptionId - Subscription identifier to delete
 * @returns {void}
 */
deleteSubscription(subscriptionId: string): void

/**
 * Refreshes subscription list data
 * Reloads subscription data from server
 * Updates table display with latest information
 * @returns {void}
 */
refreshSubscriptionList(): void

/**
 * Applies filter criteria to subscription list
 * Processes filter form data and updates display
 * Handles multiple filter criteria simultaneously
 * @returns {void}
 */
applyFilters(): void

/**
 * Clears all applied filters
 * Resets filter form and restores full subscription list
 * Handles filter state cleanup and UI updates
 * @returns {void}
 */
clearFilters(): void

/**
 * Searches subscriptions by text query
 * Performs text-based search across subscription fields
 * Handles search query processing and result filtering
 * @param {string} searchTerm - Search query string
 * @returns {void}
 */
searchSubscriptions(searchTerm: string): void

/**
 * Filters subscriptions by status
 * Applies status-based filtering to subscription list
 * Handles status selection and data filtering
 * @param {string} status - Status filter criteria
 * @returns {void}
 */
filterByStatus(status: string): void

/**
 * Calculates subscription billing amounts
 * Computes pricing based on subscription type and frequency
 * Handles proration and billing calculations
 * @param {any} subscriptionData - Subscription configuration
 * @returns {number} Calculated billing amount
 */
calculateBilling(subscriptionData: any): number

/**
 * Processes subscription payment
 * Handles payment gateway integration and processing
 * Manages payment workflow and transaction handling
 * @param {any} paymentData - Payment information and details
 * @returns {Promise<any>} Payment processing result
 */
processPayment(paymentData: any): Promise<any>

/**
 * Updates subscription billing information
 * Modifies billing details and payment methods
 * Handles billing information validation and updates
 * @param {string} subscriptionId - Subscription identifier
 * @param {any} billingInfo - Updated billing information
 * @returns {void}
 */
updateBillingInfo(subscriptionId: string, billingInfo: any): void

/**
 * Generates subscription invoice
 * Creates billing invoice for subscription charges
 * Handles invoice generation and formatting
 * @param {string} subscriptionId - Subscription for invoice
 * @returns {Promise<any>} Generated invoice data
 */
generateInvoice(subscriptionId: string): Promise<any>

/**
 * Retrieves subscription analytics and metrics
 * Fetches subscription performance data and statistics
 * Provides insights into subscription trends and usage
 * @returns {Promise<any>} Subscription metrics data
 */
getSubscriptionMetrics(): Promise<any>

/**
 * Generates subscription reports
 * Creates comprehensive subscription analytics reports
 * Handles report formatting and data export
 * @param {any} reportParams - Report generation parameters
 * @returns {Promise<any>} Generated report data
 */
generateReport(reportParams: any): Promise<any>

/**
 * Exports subscription data in various formats
 * Handles data export to CSV, Excel, and PDF formats
 * Manages export file generation and download
 * @param {string} format - Export format ('csv', 'excel', 'pdf')
 * @returns {void}
 */
exportSubscriptionData(format: string): void

/**
 * Retrieves subscriptions from API
 * Fetches subscription data with filtering and pagination
 * Returns structured subscription information
 * @param {any} filters - Subscription filter criteria
 * @returns {Observable<any>} Subscription data response
 */
getSubscriptions(filters: any): Observable<any>

/**
 * Creates new subscription via API
 * Submits subscription configuration to server
 * Handles subscription creation and validation
 * @param {any} subscriptionData - Subscription configuration data
 * @returns {Observable<any>} Subscription creation response
 */
createSubscription(subscriptionData: any): Observable<any>

/**
 * Updates subscription via API
 * Modifies subscription settings and configuration
 * Handles subscription updates and validation
 * @param {string} subscriptionId - Subscription identifier
 * @param {any} updateData - Updated subscription data
 * @returns {Observable<any>} Subscription update response
 */
updateSubscription(subscriptionId: string, updateData: any): Observable<any>

/**
 * Deletes subscription via API
 * Removes subscription and associated data
 * Handles subscription deletion with confirmation
 * @param {string} subscriptionId - Subscription identifier to delete
 * @returns {Observable<any>} Deletion confirmation response
 */
deleteSubscription(subscriptionId: string): Observable<any>

/**
 * Processes subscription billing via API
 * Handles billing cycle processing and payment collection
 * Manages billing workflow and transaction handling
 * @param {any} billingData - Billing processing parameters
 * @returns {Observable<any>} Billing processing response
 */
processBilling(billingData: any): Observable<any>

/**
 * Retrieves billing history for subscription
 * Fetches historical billing records and transactions
 * Returns comprehensive billing transaction data
 * @param {string} subscriptionId - Subscription for billing history
 * @returns {Observable<any>} Billing history response
 */
getBillingHistory(subscriptionId: string): Observable<any>

/**
 * Updates payment method for subscription
 * Modifies payment details and billing configuration
 * Handles payment method validation and updates
 * @param {string} subscriptionId - Subscription identifier
 * @param {any} paymentMethod - New payment method details
 * @returns {Observable<any>} Payment method update response
 */
updatePaymentMethod(subscriptionId: string, paymentMethod: any): Observable<any>

/**
 * Retrieves subscription analytics data
 * Fetches metrics, trends, and performance data
 * Returns comprehensive analytics information
 * @param {any} analyticsParams - Analytics query parameters
 * @returns {Observable<any>} Subscription analytics response
 */
getSubscriptionAnalytics(analyticsParams: any): Observable<any>

/**
 * Generates subscription reports via API
 * Creates detailed subscription analytics reports
 * Handles report generation and formatting
 * @param {any} reportConfig - Report configuration parameters
 * @returns {Observable<any>} Generated report response
 */
generateSubscriptionReport(reportConfig: any): Observable<any>