[CHAT-1477] partial channel update (#109)

channel.go

@@ -54,6 +54,11 @@ type Channel struct {
 	client *Client
 }
 
+type PartialUpdate struct {
+	Set   map[string]interface{} `json:"set"`
+	Unset []string               `json:"unset"`
+}
+
 type channelForJSON Channel
 
 // UnmarshalJSON implements json.Unmarshaler.
@@ -155,6 +160,13 @@ func (ch *Channel) Update(options map[string]interface{}, message *Message) erro
 	return ch.client.makeRequest(http.MethodPost, p, nil, payload, nil)
 }
 
+//  PartialUpdate set and unset specific fields when it is necessary to retain additional custom data fields on the object. AKA a patch style update.
+// options: the object to update the custom properties of the channel
+func (ch *Channel) PartialUpdate(update PartialUpdate) error {
+	p := path.Join("channels", url.PathEscape(ch.Type), url.PathEscape(ch.ID))
+	return ch.client.makeRequest(http.MethodPatch, p, nil, update, nil)
+}
+
 // Delete removes the channel. Messages are permanently removed.
 func (ch *Channel) Delete() error {
 	p := path.Join("channels", url.PathEscape(ch.Type), url.PathEscape(ch.ID))

channel_test.go

@@ -389,6 +389,36 @@ func TestChannel_Update(t *testing.T) {
 	require.NoError(t, err)
 }
 
+func TestChannel_PartialUpdate(t *testing.T) {
+	c := initClient(t)
+	_, err := c.UpdateUsers(testUsers...)
+	require.NoError(t, err, "update users")
+
+	members := make([]string, 0, len(testUsers))
+	for i := range testUsers {
+		members = append(members, testUsers[i].ID)
+	}
+
+	var ch *Channel
+	ch, err = c.CreateChannel("team", randomString(12), serverUser.ID, map[string]interface{}{
+		"members": members,
+		"color":   "blue",
+		"age":     30,
+	})
+	require.NoError(t, err)
+	err = ch.PartialUpdate(PartialUpdate{
+		Set: map[string]interface{}{
+			"color": "red",
+		},
+		Unset: []string{"age"},
+	})
+	require.NoError(t, err)
+	err = ch.refresh()
+	require.NoError(t, err)
+	require.Equal(t, "red", ch.ExtraData["color"])
+	require.Equal(t, nil, ch.ExtraData["age"])
+}
+
 func TestChannel_AddModerators(t *testing.T) {
 }