mirror of
https://github.com/logos-storage/logos-storage-network-crawler.git
synced 2026-01-02 13:33:08 +00:00
60 lines
1.5 KiB
Nim
60 lines
1.5 KiB
Nim
import pkg/chronicles
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import pkg/chronos
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import pkg/questionable
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import pkg/questionable/results
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import ../services/dht
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import ./todolist
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import ../config
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import ../types
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import ../component
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import ../state
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import ../utils/asyncdataevent
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logScope:
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topics = "crawler"
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type Crawler* = ref object of Component
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state: State
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dht: Dht
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todo: TodoList
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proc raiseCheckEvent(
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c: Crawler, nid: Nid, success: bool
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): Future[?!void] {.async: (raises: []).} =
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let event = DhtNodeCheckEventData(id: nid, isOk: success)
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if err =? (await c.state.events.dhtNodeCheck.fire(event)).errorOption:
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return failure(err)
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return success()
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proc step(c: Crawler): Future[?!void] {.async: (raises: []).} =
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without nid =? (await c.todo.pop()), err:
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return failure(err)
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without response =? await c.dht.getNeighbors(nid), err:
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return failure(err)
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if err =? (await c.raiseCheckEvent(nid, response.isResponsive)).errorOption:
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return failure(err)
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if err =? (await c.state.events.nodesFound.fire(response.nodeIds)).errorOption:
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return failure(err)
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return success()
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method start*(c: Crawler): Future[?!void] {.async.} =
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info "Starting crawler..."
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proc onStep(): Future[?!void] {.async: (raises: []), gcsafe.} =
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await c.step()
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await c.state.whileRunning(onStep, c.state.config.stepDelayMs.milliseconds)
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return success()
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method stop*(c: Crawler): Future[?!void] {.async.} =
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return success()
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proc new*(T: type Crawler, state: State, dht: Dht, todo: TodoList): Crawler =
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Crawler(state: state, dht: dht, todo: todo)
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