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presence.go
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presence.go
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/*
* Copyright 2023 The Yorkie Authors. All rights reserved.
*
* 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 presence provides the proxy for the innerpresence.Presence to be manipulated from the outside.
// TODO(hackerwins): Consider to remove this package. It is used to solve the problem of cyclic dependency
// between pkg/document/presence and pkg/document/change.
package presence
import (
"github.com/yorkie-team/yorkie/pkg/document/change"
"github.com/yorkie-team/yorkie/pkg/document/innerpresence"
)
// Presence represents a proxy for the Presence to be manipulated from the outside.
type Presence struct {
presence innerpresence.Presence
context *change.Context
}
// New creates a new instance of Presence.
func New(ctx *change.Context, presence innerpresence.Presence) *Presence {
return &Presence{
presence: presence,
context: ctx,
}
}
// Initialize initializes the presence.
func (p *Presence) Initialize(presence innerpresence.Presence) {
p.presence = presence
if p.presence == nil {
p.presence = innerpresence.NewPresence()
}
p.context.SetPresenceChange(innerpresence.PresenceChange{
ChangeType: innerpresence.Put,
Presence: p.presence,
})
}
// Set sets the value of the given key.
func (p *Presence) Set(key string, value string) {
innerPresence := p.presence
innerPresence.Set(key, value)
p.context.SetPresenceChange(innerpresence.PresenceChange{
ChangeType: innerpresence.Put,
Presence: innerPresence,
})
}
// Clear clears the value of the given key.
func (p *Presence) Clear() {
innerPresence := p.presence
innerPresence.Clear()
p.context.SetPresenceChange(innerpresence.PresenceChange{
ChangeType: innerpresence.Clear,
})
}