16 changed files with 498 additions and 97 deletions
-
2database/mongodb/changes.go
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29database/mongodb/channels.go
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7database/mongodb/db.go
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3graph2/complexity.go
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2graph2/gqlgen.yml
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79graph2/resolvers/channel.go
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12graph2/types/log.go
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16models/change.go
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9models/channel.go
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5services/changes.go
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137services/channels.go
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1services/characters.go
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224services/loaders/channelloader_gen.go
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44services/loaders/loaders.go
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19services/logs.go
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6services/services.go
@ -0,0 +1,137 @@ |
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package services |
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|
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import ( |
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"context" |
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"git.aiterp.net/rpdata/api/internal/auth" |
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"git.aiterp.net/rpdata/api/models" |
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"git.aiterp.net/rpdata/api/models/changekeys" |
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"git.aiterp.net/rpdata/api/repositories" |
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"git.aiterp.net/rpdata/api/services/loaders" |
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) |
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// ChannelService is an application service for dealing with channels.
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type ChannelService struct { |
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channels repositories.ChannelRepository |
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loader *loaders.ChannelLoader |
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changeService *ChangeService |
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} |
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func (s *ChannelService) Find(ctx context.Context, id string) (*models.Channel, error) { |
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return s.loader.Load(id) |
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} |
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func (s *ChannelService) List(ctx context.Context, filter models.ChannelFilter) ([]*models.Channel, error) { |
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if filter.LocationName != nil && filter.EventName != nil && filter.Logged != nil && filter.Limit == 0 && len(filter.Names) > 0 { |
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channels, errs := s.loader.LoadAll(filter.Names) |
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for _, err := range errs { |
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if err != nil && err != repositories.ErrNotFound { |
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return nil, err |
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} |
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} |
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|
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output := make([]*models.Channel, 0, len(channels)) |
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for _, channel := range channels { |
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if channel == nil { |
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continue |
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} |
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output = append(output, channel) |
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} |
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return output, nil |
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} |
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return s.channels.List(ctx, filter) |
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} |
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func (s *ChannelService) Create(ctx context.Context, name string, logged, hub bool, eventName, locationName string) (*models.Channel, error) { |
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err := auth.CheckPermission(ctx, "add", &models.Channel{}) |
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if err != nil { |
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return nil, err |
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} |
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|
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channel, err := s.channels.Insert(ctx, models.Channel{ |
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Name: name, |
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Logged: logged, |
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Hub: hub, |
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EventName: eventName, |
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LocationName: locationName, |
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}) |
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if err != nil { |
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return nil, err |
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} |
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|
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s.changeService.Submit(ctx, "Channel", "add", true, changekeys.Listed(channel), channel) |
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return channel, nil |
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} |
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func (s *ChannelService) Ensure(ctx context.Context, name string) (*models.Channel, error) { |
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err := auth.CheckPermission(ctx, "add", &models.Channel{}) |
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if err != nil { |
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return nil, err |
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} |
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|
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channel, err := s.channels.Find(ctx, name) |
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if err != nil { |
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channel, err = s.channels.Insert(ctx, models.Channel{ |
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Name: name, |
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Logged: false, |
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Hub: false, |
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EventName: "", |
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LocationName: "", |
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}) |
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if err != nil { |
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return nil, err |
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} |
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|
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s.changeService.Submit(ctx, "Channel", "add", true, changekeys.Listed(channel), channel) |
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} |
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return channel, nil |
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} |
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func (s *ChannelService) Update(ctx context.Context, name string, update models.ChannelUpdate) (*models.Channel, error) { |
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channel, err := s.channels.Find(ctx, name) |
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if err != nil { |
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return nil, err |
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} |
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|
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err = auth.CheckPermission(ctx, "edit", channel) |
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if err != nil { |
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return nil, err |
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} |
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channel, err = s.channels.Update(ctx, *channel, update) |
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if err != nil { |
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return nil, err |
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} |
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s.loader.Clear(channel.Name) |
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s.changeService.Submit(ctx, "Channel", "edit", true, changekeys.Listed(channel), channel) |
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return channel, nil |
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} |
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func (s *ChannelService) Delete(ctx context.Context, name string) (*models.Channel, error) { |
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channel, err := s.channels.Find(ctx, name) |
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if err != nil { |
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return nil, err |
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} |
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|
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err = auth.CheckPermission(ctx, "remove", channel) |
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if err != nil { |
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return nil, err |
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} |
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err = s.channels.Remove(ctx, *channel) |
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if err != nil { |
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return nil, err |
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} |
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s.changeService.Submit(ctx, "Channel", "remove", true, changekeys.Listed(channel), channel) |
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s.loader.Clear(channel.Name) |
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return channel, nil |
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} |
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@ -0,0 +1,224 @@ |
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// Code generated by github.com/vektah/dataloaden, DO NOT EDIT.
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package loaders |
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import ( |
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"sync" |
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"time" |
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"git.aiterp.net/rpdata/api/models" |
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) |
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|
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// ChannelLoaderConfig captures the config to create a new ChannelLoader
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type ChannelLoaderConfig struct { |
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// Fetch is a method that provides the data for the loader
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Fetch func(keys []string) ([]*models.Channel, []error) |
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// Wait is how long wait before sending a batch
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Wait time.Duration |
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// MaxBatch will limit the maximum number of keys to send in one batch, 0 = not limit
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MaxBatch int |
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} |
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// NewChannelLoader creates a new ChannelLoader given a fetch, wait, and maxBatch
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func NewChannelLoader(config ChannelLoaderConfig) *ChannelLoader { |
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return &ChannelLoader{ |
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fetch: config.Fetch, |
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wait: config.Wait, |
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maxBatch: config.MaxBatch, |
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} |
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} |
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// ChannelLoader batches and caches requests
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type ChannelLoader struct { |
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// this method provides the data for the loader
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fetch func(keys []string) ([]*models.Channel, []error) |
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// how long to done before sending a batch
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wait time.Duration |
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// this will limit the maximum number of keys to send in one batch, 0 = no limit
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maxBatch int |
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// INTERNAL
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// lazily created cache
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cache map[string]*models.Channel |
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// the current batch. keys will continue to be collected until timeout is hit,
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// then everything will be sent to the fetch method and out to the listeners
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batch *channelLoaderBatch |
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// mutex to prevent races
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mu sync.Mutex |
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} |
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type channelLoaderBatch struct { |
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keys []string |
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data []*models.Channel |
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error []error |
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closing bool |
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done chan struct{} |
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} |
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// Load a Channel by key, batching and caching will be applied automatically
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func (l *ChannelLoader) Load(key string) (*models.Channel, error) { |
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return l.LoadThunk(key)() |
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} |
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|
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// LoadThunk returns a function that when called will block waiting for a Channel.
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// This method should be used if you want one goroutine to make requests to many
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// different data loaders without blocking until the thunk is called.
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func (l *ChannelLoader) LoadThunk(key string) func() (*models.Channel, error) { |
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l.mu.Lock() |
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if it, ok := l.cache[key]; ok { |
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l.mu.Unlock() |
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return func() (*models.Channel, error) { |
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return it, nil |
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} |
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} |
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if l.batch == nil { |
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l.batch = &channelLoaderBatch{done: make(chan struct{})} |
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} |
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batch := l.batch |
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pos := batch.keyIndex(l, key) |
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l.mu.Unlock() |
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return func() (*models.Channel, error) { |
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<-batch.done |
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var data *models.Channel |
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if pos < len(batch.data) { |
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data = batch.data[pos] |
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} |
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var err error |
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// its convenient to be able to return a single error for everything
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if len(batch.error) == 1 { |
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err = batch.error[0] |
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} else if batch.error != nil { |
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err = batch.error[pos] |
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} |
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|
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if err == nil { |
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l.mu.Lock() |
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l.unsafeSet(key, data) |
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l.mu.Unlock() |
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} |
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return data, err |
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} |
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} |
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|
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// LoadAll fetches many keys at once. It will be broken into appropriate sized
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// sub batches depending on how the loader is configured
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func (l *ChannelLoader) LoadAll(keys []string) ([]*models.Channel, []error) { |
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results := make([]func() (*models.Channel, error), len(keys)) |
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|
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for i, key := range keys { |
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results[i] = l.LoadThunk(key) |
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} |
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|
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channels := make([]*models.Channel, len(keys)) |
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errors := make([]error, len(keys)) |
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for i, thunk := range results { |
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channels[i], errors[i] = thunk() |
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} |
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return channels, errors |
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} |
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|
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// LoadAllThunk returns a function that when called will block waiting for a Channels.
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// This method should be used if you want one goroutine to make requests to many
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// different data loaders without blocking until the thunk is called.
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func (l *ChannelLoader) LoadAllThunk(keys []string) func() ([]*models.Channel, []error) { |
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results := make([]func() (*models.Channel, error), len(keys)) |
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for i, key := range keys { |
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results[i] = l.LoadThunk(key) |
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} |
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return func() ([]*models.Channel, []error) { |
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channels := make([]*models.Channel, len(keys)) |
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errors := make([]error, len(keys)) |
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for i, thunk := range results { |
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channels[i], errors[i] = thunk() |
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} |
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return channels, errors |
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} |
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} |
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|
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// Prime the cache with the provided key and value. If the key already exists, no change is made
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// and false is returned.
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// (To forcefully prime the cache, clear the key first with loader.clear(key).prime(key, value).)
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func (l *ChannelLoader) Prime(key string, value *models.Channel) bool { |
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l.mu.Lock() |
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var found bool |
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if _, found = l.cache[key]; !found { |
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// make a copy when writing to the cache, its easy to pass a pointer in from a loop var
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// and end up with the whole cache pointing to the same value.
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cpy := *value |
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l.unsafeSet(key, &cpy) |
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} |
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l.mu.Unlock() |
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return !found |
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} |
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|
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// Clear the value at key from the cache, if it exists
|
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func (l *ChannelLoader) Clear(key string) { |
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l.mu.Lock() |
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delete(l.cache, key) |
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l.mu.Unlock() |
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} |
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|
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func (l *ChannelLoader) unsafeSet(key string, value *models.Channel) { |
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if l.cache == nil { |
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l.cache = map[string]*models.Channel{} |
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} |
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l.cache[key] = value |
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} |
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|
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// keyIndex will return the location of the key in the batch, if its not found
|
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// it will add the key to the batch
|
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func (b *channelLoaderBatch) keyIndex(l *ChannelLoader, key string) int { |
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for i, existingKey := range b.keys { |
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if key == existingKey { |
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return i |
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} |
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} |
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|
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pos := len(b.keys) |
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b.keys = append(b.keys, key) |
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if pos == 0 { |
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go b.startTimer(l) |
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} |
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|
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if l.maxBatch != 0 && pos >= l.maxBatch-1 { |
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if !b.closing { |
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b.closing = true |
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l.batch = nil |
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go b.end(l) |
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} |
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} |
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|
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return pos |
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} |
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|
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func (b *channelLoaderBatch) startTimer(l *ChannelLoader) { |
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time.Sleep(l.wait) |
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l.mu.Lock() |
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|
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// we must have hit a batch limit and are already finalizing this batch
|
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if b.closing { |
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l.mu.Unlock() |
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return |
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} |
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|
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l.batch = nil |
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l.mu.Unlock() |
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|
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b.end(l) |
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} |
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|
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func (b *channelLoaderBatch) end(l *ChannelLoader) { |
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b.data, b.error = l.fetch(b.keys) |
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close(b.done) |
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} |
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