Updating a Channel

using GetStream;
using GetStream.Models;

var client = new StreamClient("{{ api_key }}", "{{ api_secret }}");
var chat = new ChatClient(client);

// Create a channel with some custom data
var channelResp = await chat.GetOrCreateChannelAsync("messaging", "general",
    new ChannelGetOrCreateRequest
    {
        Data = new ChannelInput
        {
            CreatedByID = createdByUserId,
            Custom = new Dictionary<string, object>
            {
                ["source"] = "user",
                ["source_detail"] = new Dictionary<string, object> { ["user_id"] = 123 },
                ["channel_detail"] = new Dictionary<string, object>
                {
                    ["topic"] = "Plants and Animals",
                    ["rating"] = "pg"
                }
            }
        }
    });

// let's change the source of this channel
await chat.UpdateChannelPartialAsync("messaging", "general",
    new UpdateChannelPartialRequest
    {
        Set = new Dictionary<string, object> { ["source"] = "system" }
    });

// since it's system generated we no longer need source_detail
await chat.UpdateChannelPartialAsync("messaging", "general",
    new UpdateChannelPartialRequest
    {
        Unset = new List<string> { "source_detail" }
    });

// and finally update one of the nested fields in the channel_detail
await chat.UpdateChannelPartialAsync("messaging", "general",
    new UpdateChannelPartialRequest
    {
        Set = new Dictionary<string, object> { ["channel_detail.topic"] = "Nature" }
    });

// and maybe we decide we no longer need a rating
await chat.UpdateChannelPartialAsync("messaging", "general",
    new UpdateChannelPartialRequest
    {
        Unset = new List<string> { "channel_detail.rating" }
    });

public async Task PartialUpdate()
{
  var channel = await Client.GetOrCreateChannelWithIdAsync(ChannelType.Messaging, channelId: "my-channel-id");

  var setClanInfo = new ClanData
  {
    MaxMembers = 50,
    Name = "Wild Boards",
    Tags = new List<string>
    {
      "Competitive",
      "Legendary",
    }
  };

  var setFields = new Dictionary<string, object>();

  // Set custom values
  setFields.Add("frags", 5);
  // Set custom arrays
  setFields.Add("items", new[] { "sword", "shield" });
  // Set custom class objects
  setFields.Add("clan_info", setClanInfo);

  // Send data
  await channel.UpdatePartialAsync(setFields);

  // Data is now available via CustomData property
  var frags = channel.CustomData.Get<int>("frags");
  var items = channel.CustomData.Get<List<string>>("items");
  var clanInfo = channel.CustomData.Get<ClanData>("clan_info");
}

// Example class with data that you can assign as Channel custom data
private class ClanData
{
  public int MaxMembers;
  public string Name;
  public List<string> Tags;
}

var resp = await chat.UpdateChannelAsync("messaging", channelId,
    new UpdateChannelRequest
    {
        Data = new ChannelInputRequest
        {
            Custom = new Dictionary<string, object>
            {
                ["name"] = "myspecialchannel",
                ["color"] = "green"
            }
        }
    });

var updateRequest = new StreamUpdateOverwriteChannelRequest
{
  Name = "New name",
  CustomData = new StreamCustomDataRequest
  {
    {"my-custom-int", 12},
    {"my-custom-array", new string[]{"one", "two"}}
  }
};

// This request will have all channel data removed except what is being passed in the request
await channel.UpdateOverwriteAsync(updateRequest);

// You can also pass an instance of channel to the request constructor to have all of the date copied over
// This way you alter only the fields you wish to change
var updateRequest2 = new StreamUpdateOverwriteChannelRequest(channel)
{
  Name = "Brand new name"
};

// This will update only the name because all other data was copied over
await channel.UpdateOverwriteAsync(updateRequest2);