34 lines
1003 B
Racket
34 lines
1003 B
Racket
#lang syndicate/actor
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(require racket/exn)
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(require racket/set)
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(require racket/string)
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(require net/url)
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(require/activate syndicate/drivers/web)
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(require "../private/util.rkt")
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(require "../protocol.rkt")
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(actor #:name 'topic-demand-analyzer
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(during/actor (topic-demand $full-topic _)
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#:name (list 'topic-demand full-topic)
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(define/query-value topic-baseurl #f (canonical-baseurl $b)
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(canonical-url b `("topic" ("" ()))))
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(define/dataflow state
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(cond
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[(not (topic-baseurl)) 'unknown]
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[(string-prefix? full-topic (topic-baseurl)) 'local]
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[else 'remote]))
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(begin/dataflow
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(log-info "Topic-demand for ~s is in state ~s." full-topic (state)))
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(assert #:when (eq? (state) 'local)
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(local-topic-demand (substring full-topic (string-length (topic-baseurl)))))
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(assert #:when (eq? (state) 'remote)
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(remote-topic-demand full-topic))))
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