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// Copyright 2017 Vector Creations Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package producers
import (
"encoding/json"
"github.com/Shopify/sarama"
)
// UserUpdateProducer produces events related to user updates.
type UserUpdateProducer struct {
Topic string
Producer sarama.SyncProducer
}
// TODO: Move this struct to `internal` so the components that consume the topic
// can use it when parsing incoming messages
type profileUpdate struct {
Updated string `json:"updated"` // Which attribute is updated (can be either `avatar_url` or `displayname`)
OldValue string `json:"old_value"` // The attribute's value before the update
NewValue string `json:"new_value"` // The attribute's value after the update
}
// SendUpdate sends an update using kafka to notify the roomserver of the
// profile update. Returns an error if the update failed to send.
func (p *UserUpdateProducer) SendUpdate(
userID string, updatedAttribute string, oldValue string, newValue string,
) error {
var update profileUpdate
var m sarama.ProducerMessage
m.Topic = string(p.Topic)
m.Key = sarama.StringEncoder(userID)
update = profileUpdate{
Updated: updatedAttribute,
OldValue: oldValue,
NewValue: newValue,
}
value, err := json.Marshal(update)
if err != nil {
return err
}
m.Value = sarama.ByteEncoder(value)
_, _, err = p.Producer.SendMessage(&m)
return err
}
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