.. role:: raw-html-m2r(raw)
   :format: html



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Azure Communication Chat Package client library for Python
==========================================================

This package contains a Python SDK for Azure Communication Services for Chat.
Read more about Azure Communication Services `here <https://docs.microsoft.com/azure/communication-services/overview>`_

Getting started
===============

Prerequisites
-------------


* Python 2.7, or 3.5 or later is required to use this package.
* A deployed Communication Services resource. You can use the `Azure Portal <https://docs.microsoft.com/azure/communication-services/quickstarts/create-communication-resource?tabs=windows&pivots=platform-azp>`_ or the `Azure PowerShell <https://docs.microsoft.com/powershell/module/az.communication/new-azcommunicationservice>`_ to set it up.

Install the package
-------------------

Install the Azure Communication Service Chat SDK.

.. code-block:: bash

   pip install --pre azure-communication-chat

User Access Tokens
------------------

User access tokens enable you to build client applications that directly authenticate to Azure Communication Services. You can generate these tokens with azure.communication.identity module, and then use them to initialize the Communication Services SDKs. Example of using azure.communication.identity:

.. code-block:: bash

   pip install --pre azure-communication-identity

.. code-block:: python

   from azure.communication.identity import CommunicationIdentityClient
   identity_client = CommunicationIdentityClient.from_connection_string("<connection string of your Communication service>")
   user = identity_client.create_user()
   tokenresponse = identity_client.get_token(user, scopes=["chat"])
   token = tokenresponse.token

The ``user`` created above will be used later, because that user should be added as a participant of new chat thread when you creating
it with this token. It is because the initiator of the create request must be in the list of the participants of the chat thread.

Create the Chat Client
----------------------

This will allow you to create, get, list or delete chat threads.

.. code-block:: python

   from azure.communication.chat import ChatClient
   from azure.communication.identity._shared.user_credential import CommunicationTokenCredential
   from azure.communication.identity._shared.user_token_refresh_options import CommunicationTokenRefreshOptions

   # Your unique Azure Communication service endpoint
   endpoint = "https://<RESOURCE_NAME>.communcationservices.azure.com"
   refresh_options = CommunicationTokenRefreshOptions(token)
   chat_client = ChatClient(endpoint, CommunicationTokenCredential(refresh_options))

Create Chat Thread Client
-------------------------

The ChatThreadClient will allow you to perform operations specific to a chat thread, like send message, get message, update
the chat thread topic, add participants to chat thread, etc.

You can get it by creating a new chat thread using ChatClient:

.. code-block:: python

   create_chat_thread_result = chat_client.create_chat_thread(topic)
   chat_thread_client = chat_client.get_chat_thread_client(create_chat_thread_result.chat_thread.id)

Additionally, the client can also direct so that the request is repeatable; that is, if the client makes the 
request multiple times with the same Repeatability-Request-ID and it will get back an appropriate response without 
the server executing the request multiple times. The value of the Repeatability-Request-ID is an opaque string 
representing a client-generated, globally unique for all time, identifier for the request.

.. code-block:: python

   create_chat_thread_result = chat_client.create_chat_thread(
       topic, 
       thread_participants=thread_participants, 
       repeatability_request_id=repeatability_request_id
   )
   chat_thread_client = chat_client.get_chat_thread_client(create_chat_thread_result.chat_thread.id)

Alternatively, if you have created a chat thread before and you have its thread_id, you can create it by:

.. code-block:: python

   chat_thread_client = chat_client.get_chat_thread_client(thread_id) # thread_id is the id of an existing chat thread

Key concepts
============

A chat conversation is represented by a chat thread. Each user in the thread is called a thread participant. 
Thread participants can chat with one another privately in a 1:1 chat or huddle up in a 1:N group chat. 
Users also get near real-time updates for when others are typing and when they have read the messages.

Once you initialized a ``ChatClient`` class, you can do the following chat operations:

Create, get, update, and delete threads
---------------------------------------

Perform CRD(Create-Read-Delete) operations on thread participants

.. code-block:: Python

   create_chat_thread(topic, **kwargs)
   get_chat_thread(thread_id, **kwargs)
   list_chat_threads(**kwargs)
   delete_chat_thread(thread_id, **kwargs)

Once you initialized a ``ChatThreadClient`` class, you can do the following chat operations:

Update thread
-------------

Perform Update operation on thread topic

.. code-block:: python

   update_topic(topic, **kwargs)

Send, get, update, and delete messages
--------------------------------------

Perform CRUD(Create-Read-Update-Delete) operations on messages

.. code-block:: Python

   send_message(content, **kwargs)
   get_message(message_id, **kwargs)
   list_messages(**kwargs)
   update_message(message_id, content, **kwargs)
   delete_message(message_id, **kwargs)

Get, add, and remove participants
---------------------------------

Perform CRD(Create-Read-Delete) operations on thread participants

.. code-block:: Python

   list_participants(**kwargs)
   add_participant(thread_participant, **kwargs)
   add_participants(thread_participants, **kwargs)
   remove_participant(participant_id, **kwargs)

Send typing notification
------------------------

Notify the service of typing notification

.. code-block:: python

   send_typing_notification(**kwargs)

Send and get read receipt
-------------------------

Notify the service that a message is read and get list of read messages.

.. code-block:: Python

   send_read_receipt(message_id, **kwargs)
   list_read_receipts(**kwargs)

Examples
========

The following sections provide several code snippets covering some of the most common tasks, including:


.. raw:: html

   <!-- - [Thread Operations](#thread-operations)
   - [Message Operations](#message-operations)
   - [Thread Participant Operations](#thread-participant-operations)
   - [Events Operations](#events-operations) -->



Thread Operations
-----------------

Create a thread
^^^^^^^^^^^^^^^

Use the ``create_chat_thread`` method to create a chat thread.


* Use ``topic``\ , required, to give a thread topic;
* Use ``thread_participants``\ , optional, to provide a list the ``ChatThreadParticipant`` to be added to the thread;

  * ``user``\ , required, it is the ``CommunicationUserIdentifier`` you created by CommunicationIdentityClient.create_user()
    from User Access Tokens

    .. raw:: html

       <!-- [User Access Tokens](#user-access-tokens) -->


  * ``display_name``\ , optional, is the display name for the thread participant.
  * ``share_history_time``\ , optional, time from which the chat history is shared with the participant.

* Use ``repeatability_request_id``\ , optional, to specify the unique identifier for the request.

``CreateChatThreadResult`` is the result returned from creating a thread, you can use it to fetch the ``id`` of 
the chat thread that got created. This ``id`` can then be used to fetch a ``ChatThreadClient`` object using 
the ``get_chat_thread_client`` method. ``ChatThreadClient`` can be used to perform other chat operations to this chat thread.

.. code-block:: Python

   # Without repeatability_request_id and thread_participants
   topic = "test topic"
   create_chat_thread_result = chat_client.create_chat_thread(topic)
   chat_thread_client = chat_client.get_chat_thread_client(create_chat_thread_result.chat_thread.id)

.. code-block:: Python

   # With repeatability_request_id and thread_participants
   from azure.communication.identity import CommunicationIdentityClient
   from azure.communication.chat import ChatThreadParticipant
   import uuid

   # create an user
   identity_client = CommunicationIdentityClient.from_connection_string('<connection_string>')
   user = identity_client.create_user()

   ## OR pass existing user
   # from azure.communication.identity import CommunicationUserIdentifier
   # user_id = 'some_user_id'
   # user = CommunicationUserIdentifier(user_id)


   # modify function to implement customer logic
   def get_unique_identifier_for_request(**kwargs):
       res = uuid.uuid4()
       return res

   topic = "test topic"
   thread_participants = [ChatThreadParticipant(
       user='<user>',
       display_name='name',
       share_history_time=datetime.utcnow()
   )]

   # obtains repeatability_request_id using some customer logic
   repeatability_request_id = get_unique_identifier_for_request()

   create_chat_thread_result = chat_client.create_chat_thread(
       topic, 
       thread_participants=thread_participants, 
       repeatability_request_id=repeatability_request_id)
   thread_id = create_chat_thread_result.chat_thread.id

   # fetch ChatThreadClient
   chat_thread_client = chat_client.get_chat_thread_client(create_chat_thread_result.chat_thread.id)

   # Additionally, you can also check if all participants were successfully added or not
   # and subsequently retry adding the failed participants again
   def decide_to_retry(error, **kwargs):
       """
       Insert some custom logic to decide if retry is applicable based on error
       """
       return True

   retry = [thread_participant for thread_participant, error in create_chat_thread_result.errors if decide_to_retry(error)]
   chat_thread_client.add_participants(retry)

Get a thread
^^^^^^^^^^^^

Use ``get_chat_thread`` method retrieves a ``ChatThread`` from the service; ``thread_id`` is the unique ID of the thread.


* Use ``thread_id``\ , required, to specify the unique ID of the thread. 
  .. code-block:: Python

     chat_thread = chat_client.get_chat_thread(thread_id=thread_id)

List chat threads
^^^^^^^^^^^^^^^^^

Use ``list_chat_threads`` method retrieves the list of created chat threads


* Use ``results_per_page``\ , optional, The maximum number of messages to be returned per page.
* Use ``start_time``\ , optional, The start time where the range query.

An iterator of ``[ChatThreadInfo]`` is the response returned from listing threads

.. code-block:: python

   from datetime import datetime, timedelta
   import pytz

   start_time = datetime.utcnow() - timedelta(days=2)
   start_time = start_time.replace(tzinfo=pytz.utc)

   chat_thread_infos = chat_client.list_chat_threads(results_per_page=5, start_time=start_time)
   for chat_thread_info_page in chat_thread_infos.by_page():
       for chat_thread_info in chat_thread_info_page:
           print(chat_thread_info)

Update a thread topic
^^^^^^^^^^^^^^^^^^^^^

Use ``update_topic`` method to update a thread's properties. ``topic`` is used to describe the change of the thread topic


* Use ``topic`` to give thread a new topic;

.. code-block:: python

   topic="new topic"
   chat_thread_client.update_topic(topic=topic)

   chat_thread = chat_client.get_chat_thread(thread_id)

   assert chat_thread.topic == topic

Delete a thread
^^^^^^^^^^^^^^^

Use ``delete_chat_thread`` method to delete a thread; ``thread_id`` is the unique ID of the thread.


* Use ``thread_id``\ , required, to specify the unique ID of the thread.
  .. code-block:: Python

     chat_client.delete_chat_thread(thread_id=thread_id)

Message Operations
------------------

Send a message
^^^^^^^^^^^^^^

Use ``send_message`` method to sends a message to a thread identified by ``thread_id``.


* Use ``content``\ , required, to provide the chat message content.
* Use ``chat_message_type``\ , optional, to provide the chat message type. Possible values include: ``ChatMessageType.TEXT``\ , 
  ``ChatMessageType.HTML``\ , ``'text'``\ , ``'html'``\ ; if not specified, ``ChatMessageType.TEXT`` will be set
* Use ``sender_display_name``\ ,optional, to specify the display name of the sender, if not specified, empty name will be set

``SendChatMessageResult`` is the response returned from sending a message, it contains an id, which is the unique ID of the message.

.. code-block:: Python

   from azure.communication.chat import ChatMessageType

   topic = "test topic"
   create_chat_thread_result = chat_client.create_chat_thread(topic)
   thread_id = create_chat_thread_result.chat_thread.id
   chat_thread_client = chat_client.get_chat_thread_client(create_chat_thread_result.chat_thread.id)


   content='hello world'
   sender_display_name='sender name'
   chat_message_type = ChatMessageType.TEXT

   # without specifying sender_display_name and chat_message_type
   send_message_result_id = chat_thread_client.send_message(content)
   print("Message sent: id: ", send_message_result_id)

   # specifying sender_display_name and chat_message_type
   send_message_result_w_type_id = chat_thread_client.send_message(
               content,
               sender_display_name=sender_display_name,
               chat_message_type=chat_message_type # equivalent to chat_message_type = 'text'
   )
   print("Message sent: id: ", send_message_result_w_type_id)

Get a message
^^^^^^^^^^^^^

Use ``get_message`` method retrieves a message from the service; ``message_id`` is the unique ID of the message.


* Use ``message_id``\ ,required, to specify message id of an existing message
  ``ChatMessage`` is the response returned from getting a message, it contains an id, which is the unique ID of the message, and other fields please refer to azure.communication.chat.ChatMessage

.. code-block:: python

   chat_message = chat_thread_client.get_message(message_id=send_message_result_id)
   print("get_chat_message succeeded, message id:", chat_message.id, "content: ", chat_message.content)

List messages
^^^^^^^^^^^^^

Use ``list_messages`` method retrieves messages from the service.


* Use ``results_per_page``\ , optional, The maximum number of messages to be returned per page.
* Use ``start_time``\ , optional, The start time where the range query.

An iterator of ``[ChatMessage]`` is the response returned from listing messages

.. code-block:: Python

   from datetime import datetime, timedelta
   import pytz

   start_time = datetime.utcnow() - timedelta(days=1)
   start_time = start_time.replace(tzinfo=pytz.utc)

   chat_messages = chat_thread_client.list_messages(results_per_page=1, start_time=start_time)
   for chat_message_page in chat_messages.by_page():
       for chat_message in chat_message_page:
           print("ChatMessage: Id=", chat_message.id, "; Content=", chat_message.content.message)

Update a message
^^^^^^^^^^^^^^^^

Use ``update_message`` to update a message identified by threadId and messageId.


* Use ``message_id``\ ,required, is the unique ID of the message.
* Use ``content``\ , optional, is the message content to be updated; if not specified it is assigned to be empty

.. code-block:: Python

   content = "updated message content"
   chat_thread_client.update_message(send_message_result_id, content=content)

   chat_message = chat_thread_client.get_message(message_id=send_message_result_id)

   assert chat_message.content == content

Delete a message
^^^^^^^^^^^^^^^^

Use ``delete_message`` to delete a message.


* Use ``message_id``\ , required, is the unique ID of the message.

.. code-block:: python

   chat_thread_client.delete_message(message_id=send_message_result_id)

Thread Participant Operations
-----------------------------

List thread participants
^^^^^^^^^^^^^^^^^^^^^^^^

Use ``list_participants`` to retrieve the participants of the thread.


* Use ``results_per_page``\ , optional, The maximum number of participants to be returned per page.
* Use ``skip``\ , optional, to skips participants up to a specified position in response.

An iterator of ``[ChatThreadParticipant]`` is the response returned from listing participants

.. code-block:: python

   chat_thread_participants = chat_thread_client.list_participants(results_per_page=5, skip=5)
   for chat_thread_participant_page in chat_thread_participants.by_page():
       for chat_thread_participant in chat_thread_participant_page:
           print("ChatThreadParticipant: ", chat_thread_participant)

Add single thread participant
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Use ``add_participant`` method to add a single thread participants to the thread.


* Use ``thread_participant``\ , required, to specify the ``ChatThreadParticipant`` to be added to the thread;

  * ``user``\ , required, it is the ``CommunicationUserIdentifier`` you created by CommunicationIdentityClient.create_user() from User Access Tokens

    .. raw:: html

       <!-- [User Access Tokens](#user-access-tokens) -->


  * ``display_name``\ , optional, is the display name for the thread participant.
  * ``share_history_time``\ , optional, time from which the chat history is shared with the participant.

When participant is successfully added, no error is thrown. In case of an error encountered while adding participant, 
a ``RuntimeError`` is thrown

.. code-block:: python

   from azure.communication.identity import CommunicationIdentityClient
   from azure.communication.chat import ChatThreadParticipant
   from datetime import datetime

   # create an user
   identity_client = CommunicationIdentityClient.from_connection_string('<connection_string>')
   new_user = identity_client.create_user()

   # # conversely, you can also add an existing user to a chat thread; provided the user_id is known
   # from azure.communication.identity import CommunicationUserIdentifier
   #
   # user_id = 'some user id'
   # user_display_name = "Wilma Flinstone"
   # new_user = CommunicationUserIdentifier(user_id)
   # participant = ChatThreadParticipant(
   #     user=new_user,
   #     display_name=user_display_name,
   #     share_history_time=datetime.utcnow())

   def decide_to_retry(error, **kwargs):
       """
       Insert some custom logic to decide if retry is applicable based on error
       """
       return True

   participant = ChatThreadParticipant(
       user=new_user,
       display_name='Fred Flinstone',
       share_history_time=datetime.utcnow())

   try:
       chat_thread_client.add_participant(thread_participant=participant)
   except RuntimeError as e:
       if e is not None and decide_to_retry(error=e):
           chat_thread_client.add_participant(thread_participant=participant)

Add thread participants
^^^^^^^^^^^^^^^^^^^^^^^

Use ``add_participants`` method to add thread participants to the thread.


* Use ``thread_participants``\ , required, to list the ``ChatThreadParticipant`` to be added to the thread;

  * ``user``\ , required, it is the ``CommunicationUserIdentifier`` you created by CommunicationIdentityClient.create_user() from User Access Tokens

    .. raw:: html

       <!-- [User Access Tokens](#user-access-tokens) -->


  * ``display_name``\ , optional, is the display name for the thread participant.
  * ``share_history_time``\ , optional, time from which the chat history is shared with the participant.

A ``list(tuple(ChatThreadParticipant, CommunicationError))`` is returned. When participant is successfully added,
an empty list is expected. In case of an error encountered while adding participant, the list is populated
with the failed participants along with the error that was encountered.

.. code-block:: Python

   from azure.communication.identity import CommunicationIdentityClient
   from azure.communication.chat import ChatThreadParticipant
   from datetime import datetime

   # create 2 users
   identity_client = CommunicationIdentityClient.from_connection_string('<connection_string>')
   new_users = [identity_client.create_user() for i in range(2)]

   # # conversely, you can also add an existing user to a chat thread; provided the user_id is known
   # from azure.communication.identity import CommunicationUserIdentifier
   #
   # user_id = 'some user id'
   # user_display_name = "Wilma Flinstone"
   # new_user = CommunicationUserIdentifier(user_id)
   # participant = ChatThreadParticipant(
   #     user=new_user,
   #     display_name=user_display_name,
   #     share_history_time=datetime.utcnow())

   participants = []
   for _user in new_users:
     chat_thread_participant = ChatThreadParticipant(
       user=_user,
       display_name='Fred Flinstone',
       share_history_time=datetime.utcnow()
     ) 
     participants.append(chat_thread_participant) 

   response = chat_thread_client.add_participants(thread_participants=participants)

   def decide_to_retry(error, **kwargs):
       """
       Insert some custom logic to decide if retry is applicable based on error
       """
       return True

   # verify if all users has been successfully added or not
   # in case of partial failures, you can retry to add all the failed participants 
   retry = [p for p, e in response if decide_to_retry(e)]
   chat_thread_client.add_participants(retry)

Remove thread participant
^^^^^^^^^^^^^^^^^^^^^^^^^

Use ``remove_participant`` method to remove thread participant from the thread identified by threadId.
``user`` is the ``CommunicationUserIdentifier`` you created by CommunicationIdentityClient.create_user() from User Access Tokens
:raw-html-m2r:`<!-- [User Access Tokens](#user-access-tokens)  -->`
and was added into this chat thread.


* Use ``user`` to specify the ``CommunicationUserIdentifier`` you created
  ```python
  chat_thread_client.remove_participant(user=new_user)

# converesely you can also do the following; provided the user_id is known
==========================================================================

from azure.communication.identity import CommunicationUserIdentifier
====================================================================

 
=

user_id = 'some user id'
========================

chat_thread_client.remove_participant(user=CommunincationUserIdentfier(new_user))
=================================================================================

.. code-block::


   ## Events Operations

   ### Send typing notification

   Use `send_typing_notification` method to post a typing notification event to a thread, on behalf of a user.

   ```Python
   chat_thread_client.send_typing_notification()

Send read receipt
^^^^^^^^^^^^^^^^^

Use ``send_read_receipt`` method to post a read receipt event to a thread, on behalf of a user.


* Use ``message_id`` to specify the id of the message whose read receipt is to be sent
  .. code-block:: python

     content='hello world'
     send_message_result_id = chat_thread_client.send_message(content)
     chat_thread_client.send_read_receipt(message_id=send_message_result_id)

List read receipts
^^^^^^^^^^^^^^^^^^

Use ``list_read_receipts`` method retrieves read receipts for a thread.


* Use ``results_per_page``\ , optional, The maximum number of read receipts to be returned per page.
* Use ``skip``\ ,optional, to skips read receipts up to a specified position in response.

An iterator of ``[ChatMessageReadReceipt]`` is the response returned from listing read receipts

.. code-block:: python

   read_receipts = chat_thread_client.list_read_receipts(results_per_page=5, skip=5)

   for read_receipt_page in read_receipts.by_page():
       for read_receipt in read_receipt_page:
           print(read_receipt)
           print(read_receipt.sender)
           print(read_receipt.chat_message_id)
           print(read_receipt.read_on)

Sample Code
-----------

These are code samples that show common scenario operations with the Azure Communication Chat client library.
The async versions of the samples (the python sample files appended with ``_async``\ ) show asynchronous operations,
and require Python 3.5 or later.
Before run the sample code, refer to Prerequisites
:raw-html-m2r:`<!-- [Prerequisites](#Prerequisites) -->`
to create a resource, then set some Environment Variables

.. code-block:: bash

   set AZURE_COMMUNICATION_SERVICE_ENDPOINT="https://<RESOURCE_NAME>.communcationservices.azure.com"
   set AZURE_COMMUNICATION_SERVICE_CONNECTION_STRING="<connection string of your Communication service>"

   pip install azure-communication-identity

   python samples\chat_client_sample.py
   python samples\chat_client_sample_async.py
   python samples\chat_thread_client_sample.py
   python samples\chat_thread_client_sample_async.py

Troubleshooting
===============

Running into issues? This section should contain details as to what to do there.

Next steps
==========

More sample code should go here, along with links out to the appropriate example tests.

Contributing
============

If you encounter any bugs or have suggestions, please file an issue in the `Issues <https://github.com/Azure/azure-sdk-for-python/issues>`_ section of the project.


.. image:: https://azure-sdk-impressions.azurewebsites.net/api/impressions/azure-sdk-for-python%2Fsdk%2Ftemplate%2Fazure-template%2FREADME.png
   :target: https://azure-sdk-impressions.azurewebsites.net/api/impressions/azure-sdk-for-python%2Fsdk%2Ftemplate%2Fazure-template%2FREADME.png
   :alt: Impressions



Indices and tables
------------------

* :ref:`genindex`
* :ref:`modindex`
* :ref:`search`

.. toctree::
  :maxdepth: 5
  :glob:
  :caption: Developer Documentation

  azure.communication.chat.rst