Envelope System

/**
 * Envelope item types supported by Sentry
 */
type EnvelopeItemType = 
  | 'event' 
  | 'transaction' 
  | 'session' 
  | 'attachment' 
  | 'user_report' 
  | 'profile'
  | 'replay_event'
  | 'client_report'
  | 'span';

/**
 * Header information for envelope items
 */
interface EnvelopeItemHeader {
  type: EnvelopeItemType;
  length?: number;
  filename?: string;
  content_type?: string;
  attachment_type?: string;
}

/**
 * Envelope item containing header and payload
 */
interface EnvelopeItem<T = any> {
  0: EnvelopeItemHeader;
  1: T;
}

/**
 * Envelope header with metadata
 */
interface EnvelopeHeader {
  event_id?: string;
  sent_at?: string;
  sdk?: {
    name: string;
    version: string;
  };
  trace?: {
    trace_id: string;
    public_key?: string;
  };
}

/**
 * Complete envelope structure
 */
interface Envelope {
  0: EnvelopeHeader;
  1: EnvelopeItem[];
}

/**
 * Creates a new envelope with headers and optional items
 * @param headers - Envelope headers
 * @param items - Optional array of envelope items
 * @returns New envelope
 */
function createEnvelope<E extends Envelope>(
  headers: E[0],
  items?: E[1]
): E;

/**
 * Creates headers for event envelopes
 * @param event - Event data
 * @param tunnel - Optional tunnel configuration
 * @param dsn - Data source name
 * @returns Envelope headers
 */
function createEventEnvelopeHeaders(
  event: Event,
  tunnel?: string,
  dsn?: string
): EnvelopeHeader;

/**
 * Gets SDK metadata for envelope headers
 * @param sdk - SDK information
 * @returns SDK metadata object
 */
function getSdkMetadataForEnvelopeHeader(sdk: {
  name: string;
  version: string;
  integrations?: string[];
  packages?: Array<{ name: string; version: string }>;
}): { name: string; version: string };

/**
 * Creates an attachment envelope item
 * @param attachment - Attachment data
 * @returns Envelope item for the attachment
 */
function createAttachmentEnvelopeItem(
  attachment: {
    data: string | Uint8Array;
    filename: string;
    content_type?: string;
    attachment_type?: string;
  }
): EnvelopeItem;

/**
 * Creates a span envelope item for performance monitoring
 * @param span - Span data
 * @returns Envelope item for the span
 */
function createSpanEnvelopeItem(span: any): EnvelopeItem;

/**
 * Creates a client report envelope for SDK metrics
 * @param discardedEvents - Array of discarded event information
 * @param dsn - Data source name
 * @param timestamp - Report timestamp
 * @returns Complete client report envelope
 */
function createClientReportEnvelope(
  discardedEvents: Array<{
    reason: string;
    category: string;
    quantity: number;
  }>,
  dsn: string,
  timestamp?: number
): Envelope;

/**
 * Adds an item to an existing envelope
 * @param envelope - Target envelope
 * @param newItem - Item to add
 * @returns Modified envelope
 */
function addItemToEnvelope<E extends Envelope>(
  envelope: E,
  newItem: E[1][number]
): E;

/**
 * Iterates over all items in an envelope
 * @param envelope - Envelope to iterate
 * @param callback - Function called for each item
 * @returns True if iteration completed, false if callback returned false
 */
function forEachEnvelopeItem<E extends Envelope>(
  envelope: E,
  callback: (item: E[1][number], type?: EnvelopeItemType) => boolean | void,
): boolean;

/**
 * Checks if envelope contains items of a specific type
 * @param envelope - Envelope to check
 * @param itemType - Item type to look for
 * @returns True if envelope contains the specified item type
 */
function envelopeContainsItemType(
  envelope: Envelope,
  itemType: EnvelopeItemType
): boolean;

/**
 * Converts envelope item type to data category for rate limiting
 * @param itemType - Envelope item type
 * @returns Corresponding data category
 */
function envelopeItemTypeToDataCategory(
  itemType: EnvelopeItemType
): string;

/**
 * Serializes an envelope to string format for transmission
 * @param envelope - Envelope to serialize
 * @returns Serialized envelope string
 */
function serializeEnvelope(envelope: Envelope): string;

/**
 * Parses a serialized envelope string back to envelope object
 * @param env - Serialized envelope string
 * @returns Parsed envelope object
 */
function parseEnvelope(env: string): Envelope;

import { 
  createEnvelope,
  createEventEnvelopeHeaders,
  addItemToEnvelope,
  createAttachmentEnvelopeItem,
  serializeEnvelope,
  parseEnvelope
} from "@sentry/core";

// Create an envelope for an error event
const event = {
  event_id: 'abc123',
  message: 'Something went wrong',
  level: 'error',
  timestamp: Date.now() / 1000
};

const headers = createEventEnvelopeHeaders(event, undefined, 'https://key@sentry.io/project');
const envelope = createEnvelope(headers, [
  [{ type: 'event' }, event]
]);

// Add an attachment to the envelope
const attachment = createAttachmentEnvelopeItem({
  data: 'log file contents',
  filename: 'app.log',
  content_type: 'text/plain',
  attachment_type: 'event.attachment'
});

const envelopeWithAttachment = addItemToEnvelope(envelope, attachment);

// Serialize for transmission
const serialized = serializeEnvelope(envelopeWithAttachment);
console.log('Serialized envelope:', serialized);

// Parse received envelope
const parsed = parseEnvelope(serialized);
console.log('Parsed envelope:', parsed);

import { 
  createEnvelope,
  createEventEnvelopeHeaders,
  addItemToEnvelope,
  createAttachmentEnvelopeItem,
  serializeEnvelope,
  forEachEnvelopeItem
} from "@sentry/core";

class EventProcessor {
  processEvent(event: any, attachments: any[] = []): string {
    // Create envelope headers
    const headers = createEventEnvelopeHeaders(event);
    
    // Create initial envelope with event
    let envelope = createEnvelope(headers, [
      [{ type: 'event' }, event]
    ]);
    
    // Add attachments if present
    for (const attachment of attachments) {
      const attachmentItem = createAttachmentEnvelopeItem(attachment);
      envelope = addItemToEnvelope(envelope, attachmentItem);
    }
    
    // Log envelope contents for debugging
    forEachEnvelopeItem(envelope, (item, type) => {
      console.log(`Envelope contains: ${type}`);
    });
    
    // Serialize for transmission
    return serializeEnvelope(envelope);
  }
}

import { 
  createEnvelope,
  addItemToEnvelope,
  envelopeContainsItemType,
  serializeEnvelope
} from "@sentry/core";

class BatchProcessor {
  createBatchEnvelope(events: any[]): Envelope {
    // Create envelope with first event's headers
    const firstEvent = events[0];
    const headers = createEventEnvelopeHeaders(firstEvent);
    
    let envelope = createEnvelope(headers);
    
    // Add all events to the envelope
    for (const event of events) {
      envelope = addItemToEnvelope(envelope, [
        { type: 'event' },
        event
      ]);
    }
    
    return envelope;
  }
  
  validateEnvelope(envelope: Envelope): boolean {
    // Check that envelope has at least one event
    if (!envelopeContainsItemType(envelope, 'event')) {
      console.warn('Envelope contains no events');
      return false;
    }
    
    // Additional validation logic
    return true;
  }
}

import { createClientReportEnvelope, serializeEnvelope } from "@sentry/core";

class MetricsReporter {
  private discardedEvents: Array<{
    reason: string;
    category: string;
    quantity: number;
  }> = [];
  
  recordDiscardedEvent(reason: string, category: string, quantity = 1) {
    const existing = this.discardedEvents.find(
      e => e.reason === reason && e.category === category
    );
    
    if (existing) {
      existing.quantity += quantity;
    } else {
      this.discardedEvents.push({ reason, category, quantity });
    }
  }
  
  generateReport(dsn: string): string {
    const envelope = createClientReportEnvelope(
      this.discardedEvents,
      dsn,
      Date.now()
    );
    
    // Clear the recorded events
    this.discardedEvents.length = 0;
    
    return serializeEnvelope(envelope);
  }
}

// Usage
const reporter = new MetricsReporter();
reporter.recordDiscardedEvent('rate_limit', 'error', 5);
reporter.recordDiscardedEvent('invalid_data', 'transaction', 2);

const report = reporter.generateReport('https://key@sentry.io/project');

import { 
  forEachEnvelopeItem,
  createEnvelope,
  envelopeItemTypeToDataCategory
} from "@sentry/core";

class EnvelopeFilter {
  filterByCategory(envelope: Envelope, allowedCategories: string[]): Envelope {
    const filteredItems: EnvelopeItem[] = [];
    
    forEachEnvelopeItem(envelope, (item, type) => {
      if (type) {
        const category = envelopeItemTypeToDataCategory(type);
        if (allowedCategories.includes(category)) {
          filteredItems.push(item);
        }
      }
      return true; // Continue iteration
    });
    
    return createEnvelope(envelope[0], filteredItems);
  }
  
  removeAttachments(envelope: Envelope): Envelope {
    const filteredItems: EnvelopeItem[] = [];
    
    forEachEnvelopeItem(envelope, (item, type) => {
      if (type !== 'attachment') {
        filteredItems.push(item);
      }
      return true;
    });
    
    return createEnvelope(envelope[0], filteredItems);
  }
}

interface Event {
  event_id?: string;
  message?: string;
  level?: string;
  timestamp?: number;
  platform?: string;
  logger?: string;
  server_name?: string;
  release?: string;
  environment?: string;
  fingerprint?: string[];
  [key: string]: any;
}

type DataCategory = 
  | 'default'
  | 'error'
  | 'transaction'
  | 'security'
  | 'attachment'
  | 'session'
  | 'profile'
  | 'replay'
  | 'internal';