Add update channel partial (#39)

Author: ferhatelmas

README.md

@@ -131,6 +131,14 @@ chan.unban_user('bob-1')
 # Query channel state
 chan.query({'messages' => { 'limit' => 10, 'id_lte' => m1['id']}})
 
+# Update metadata (overwrite)
+chan.update({'motd' => 'one apple a day....'})
+
+# Update partial
+# 1. key-value pairs to set
+# 2. keys to unset (remove)
+chan.update_partial({color: 'blue', age: 30}, ['motd'])
+
 # Query channel members
 chan.query_members({name: {'$autocomplete': 'test'}}, sort: {last_created_at: -1}, offset: 5, limit: 5)
 ```

lib/stream-chat/channel.rb

@@ -84,6 +84,13 @@ def update(channel_data, update_message = nil)
       @client.post(url, data: payload)
     end
 
+    def update_partial(set = nil, unset = nil)
+      raise StreamChannelException 'set or unset is needed' if set.nil? && unset.nil?
+
+      payload = { set: set, unset: unset }
+      @client.patch(url, data: payload)
+    end
+
     def delete
       @client.delete(url)
     end

spec/channel_spec.rb

@@ -57,6 +57,20 @@
     expect(response['channel']['motd']).to eq 'one apple a day...'
   end
 
+  it 'can update metadata partial' do
+    @channel.update_partial({ color: 'blue', age: 30 }, ['motd'])
+    response = @channel.query
+    expect(response['channel']['color']).to eq 'blue'
+    expect(response['channel']['age']).to eq 30
+    expect(response['channel']).not_to include 'motd'
+
+    @channel.update_partial({ color: 'red' }, ['age'])
+    response = @channel.query
+    expect(response['channel']['color']).to eq 'red'
+    expect(response['channel']).not_to include 'age'
+    expect(response['channel']).not_to include 'motd'
+  end
+
   it 'can delete' do
     response = @channel.delete
     expect(response).to include 'channel'