74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
package internal
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import (
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"log/slog"
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"github.com/marcopeocchi/yt-dlp-web-ui/server/config"
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)
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type MessageQueue struct {
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producerCh chan *Process
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consumerCh chan struct{}
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logger *slog.Logger
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}
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// Creates a new message queue.
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// By default it will be created with a size equals to nthe number of logical
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// CPU cores.
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// The queue size can be set via the qs flag.
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func NewMessageQueue(logger *slog.Logger) *MessageQueue {
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size := config.Instance().QueueSize
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if size <= 0 {
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panic("invalid queue size")
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}
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return &MessageQueue{
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producerCh: make(chan *Process, size),
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consumerCh: make(chan struct{}, size),
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logger: logger,
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}
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}
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// Publish a message to the queue and set the task to a peding state.
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func (m *MessageQueue) Publish(p *Process) {
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p.SetPending()
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go func() {
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err := p.SetMetadata()
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m.logger.Error(
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"failed to retrieve metadata",
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slog.String("err", err.Error()),
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)
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}()
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m.producerCh <- p
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}
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// Publish a message to the queue and set the task to a peding state.
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// ENSURE P IS PART OF A PLAYLIST
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// Needs a further review
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func (m *MessageQueue) PublishPlaylistEntry(p *Process) {
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m.producerCh <- p
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}
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// Setup the consumer listener which subscribes to the changes to the producer
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// channel and triggers the "download" action.
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func (m *MessageQueue) Subscriber() {
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for msg := range m.producerCh {
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m.consumerCh <- struct{}{}
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go func(p *Process) {
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p.Start()
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<-m.consumerCh
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}(msg)
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}
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}
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// Empties the message queue
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func (m *MessageQueue) Empty() {
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for range m.producerCh {
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<-m.producerCh
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}
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for range m.consumerCh {
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<-m.consumerCh
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}
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}
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