Function checkDuplicateMessages

packages/localize/tools/src/extract/duplicates.ts:19–48

(
  fs: PathManipulation,
  messages: ɵParsedMessage[],
  duplicateMessageHandling: DiagnosticHandlingStrategy,
  basePath: AbsoluteFsPath,
)

 * object (as necessary).
 */
export function checkDuplicateMessages(
  fs: PathManipulation,
  messages: ɵParsedMessage[],
  duplicateMessageHandling: DiagnosticHandlingStrategy,
  basePath: AbsoluteFsPath,
): Diagnostics {
  const diagnostics = new Diagnostics();
  if (duplicateMessageHandling === 'ignore') return diagnostics;

  const messageMap = new Map<MessageId, ɵParsedMessage[]>();
  for (const message of messages) {
    if (messageMap.has(message.id)) {
      messageMap.get(message.id)!.push(message);
    } else {
      messageMap.set(message.id, [message]);
    }
  }

  for (const duplicates of messageMap.values()) {
    if (duplicates.length <= 1) continue;
    if (duplicates.every((message) => message.text === duplicates[0].text)) continue;

    const diagnosticMessage =
      `Duplicate messages with id "${duplicates[0].id}":\n` +
      duplicates.map((message) => serializeMessage(fs, basePath, message)).join('\n');
    diagnostics.add(duplicateMessageHandling, diagnosticMessage);
  }

  return diagnostics;
}

/**
 * Serialize the given `message` object into a string.