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136 lines
2.9 KiB
136 lines
2.9 KiB
package cache
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import (
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"sync"
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"github.com/zelenin/go-tdlib/client"
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)
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// Status stores formatted data for XMPP presence
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type Status struct {
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ID int64
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XMPP string
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Description string
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}
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// Cache allows operating the chats and users cache in
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// a thread-safe manner
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type Cache struct {
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chats map[int64]*client.Chat
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users map[int64]*client.User
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statuses map[int64]*Status
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chatsLock sync.Mutex
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usersLock sync.Mutex
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statusesLock sync.Mutex
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}
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// NewCache initializes a cache
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func NewCache() *Cache {
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return &Cache{
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chats: map[int64]*client.Chat{},
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users: map[int64]*client.User{},
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statuses: map[int64]*Status{},
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}
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}
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// ChatsKeys grabs chat ids synchronously to avoid lockups
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// while they are used
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func (cache *Cache) ChatsKeys() []int64 {
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cache.chatsLock.Lock()
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defer cache.chatsLock.Unlock()
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var keys []int64
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for id := range cache.chats {
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keys = append(keys, id)
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}
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return keys
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}
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// UsersKeys grabs user ids synchronously to avoid lockups
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// while they are used
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func (cache *Cache) UsersKeys() []int64 {
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cache.usersLock.Lock()
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defer cache.usersLock.Unlock()
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var keys []int64
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for id := range cache.users {
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keys = append(keys, id)
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}
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return keys
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}
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// StatusesRange loops through the map in a thread-safe manner
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func (cache *Cache) StatusesRange() chan *Status {
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cache.statusesLock.Lock()
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statusChan := make(chan *Status, 1)
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go func() {
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defer func() {
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cache.statusesLock.Unlock()
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close(statusChan)
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}()
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for _, status := range cache.statuses {
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statusChan <- status
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}
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}()
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return statusChan
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}
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// GetChat retrieves chat by id if it's present in the cache
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func (cache *Cache) GetChat(id int64) (*client.Chat, bool) {
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cache.chatsLock.Lock()
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defer cache.chatsLock.Unlock()
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chat, ok := cache.chats[id]
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return chat, ok
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}
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// GetUser retrieves user by id if it's present in the cache
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func (cache *Cache) GetUser(id int64) (*client.User, bool) {
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cache.usersLock.Lock()
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defer cache.usersLock.Unlock()
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user, ok := cache.users[id]
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return user, ok
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}
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// GetStatus retrieves status by id if it's present in the cache
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func (cache *Cache) GetStatus(id int64) (*Status, bool) {
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cache.statusesLock.Lock()
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defer cache.statusesLock.Unlock()
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status, ok := cache.statuses[id]
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return status, ok
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}
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// SetChat stores a chat in the cache
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func (cache *Cache) SetChat(id int64, chat *client.Chat) {
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cache.chatsLock.Lock()
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defer cache.chatsLock.Unlock()
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cache.chats[id] = chat
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}
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// SetUser stores a user in the cache
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func (cache *Cache) SetUser(id int64, user *client.User) {
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cache.usersLock.Lock()
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defer cache.usersLock.Unlock()
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cache.users[id] = user
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}
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// SetStatus stores a status in the cache
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func (cache *Cache) SetStatus(id int64, show string, status string) {
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cache.statusesLock.Lock()
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defer cache.statusesLock.Unlock()
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cache.statuses[id] = &Status{
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ID: id,
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XMPP: show,
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Description: status,
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}
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}
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