feat: V3 only dms

Sources/XMTPiOS/Client.swift

@@ -15,6 +15,7 @@ public enum ClientError: Error, CustomStringConvertible, LocalizedError {
 	case creationError(String)
 	case noV3Client(String)
 	case noV2Client(String)
+	case missingInboxId
 
 	public var description: String {
 		switch self {
@@ -24,6 +25,8 @@ public enum ClientError: Error, CustomStringConvertible, LocalizedError {
 			return "ClientError.noV3Client: \(err)"
 		case .noV2Client(let err):
 			return "ClientError.noV2Client: \(err)"
+		case .missingInboxId:
+			return "ClientError.missingInboxId"
 		}
 	}
 
@@ -693,6 +696,41 @@ public final class Client {
 			return nil
 		}
 	}
+
+	public func findConversation(conversationId: String) throws -> Conversation? {
+		guard let client = v3Client else {
+			throw ClientError.noV3Client("Error no V3 client initialized")
+		}
+		let conversation = try client.conversation(conversationId: conversationId.hexToData)
+		return try conversation.toConversation(client: self)
+	}
+
+	public func findConversationByTopic(topic: String) throws -> Conversation? {
+		guard let client = v3Client else {
+			throw ClientError.noV3Client("Error no V3 client initialized")
+		}
+		let regexPattern = #"/xmtp/mls/1/g-(.*?)/proto"#
+		if let regex = try? NSRegularExpression(pattern: regexPattern) {
+			let range = NSRange(location: 0, length: topic.utf16.count)
+			if let match = regex.firstMatch(in: topic, options: [], range: range) {
+				let conversationId = (topic as NSString).substring(with: match.range(at: 1))
+				let conversation = try client.conversation(conversationId: conversationId.hexToData)
+				return try conversation.toConversation(client: self)
+			}
+		}
+		return nil
+	}
+
+	public func findDm(address: String) async throws -> Dm? {
+		guard let client = v3Client else {
+			throw ClientError.noV3Client("Error no V3 client initialized")
+		}
+		guard let inboxId = try await inboxIdFromAddress(address: address) else {
+			throw ClientError.creationError("No inboxId present")
+		}
+		let conversation = try client.dmConversation(targetInboxId: inboxId)
+		return Dm(ffiConversation: conversation, client: self)
+	}
 
 	public func findMessage(messageId: String) throws -> MessageV3? {
 		guard let client = v3Client else {