// run the article through the pipeline
func runArticle(pipe *pipeline.Pipeline, article string) ([]analyzer.Analyzable, error) {
story, err := buildStory(article)
if err != nil {
panic(err)
}
pipe.Start()
pipe.PushStory(story)
var result pipeline.Story
select {
case result = <-pipe.GetOutput():
break
case <-pipe.Error():
// go get the error when you actually close the pipe
err := pipe.Close()
return nil, err
}
var related []analyzer.Analyzable
for {
select {
case analyzed, open := <-result.RelatedArticles:
if !open {
return related, pipe.Close()
}
related = append(related, analyzed)
case <-pipe.Error():
// get the error when you close the pipe
err := pipe.Close()
return nil, err
}
}
}
// manages running a story
func storyDriver(
pipe *pipeline.Pipeline,
story pipeline.Story) ([]pipeline.Article, error) {
pipe.Start()
pipe.PushStory(story)
var result pipeline.Story
select {
case result = <-pipe.GetOutput():
break
case <-pipe.Error():
// go get the error when you actually close the pipe
err := pipe.Close()
return nil, err
}
related := make([]pipeline.Article, 0)
for {
select {
case analyzed, open := <-result.RelatedArticles:
if !open {
return related, pipe.Close()
}
related = append(related, analyzed)
case <-pipe.Error():
// get the error when you close the pipe
err := pipe.Close()
return nil, err
}
}
}