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-rw-r--r--src/Network/BitTorrent/Peer/Status.hs65
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diff --git a/src/Network/BitTorrent/Peer/Status.hs b/src/Network/BitTorrent/Peer/Status.hs
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1-- |
2-- Copyright : (c) Sam T. 2013
3-- License : MIT
4-- Maintainer : pxqr.sta@gmail.com
5-- Stability : experimental
6-- Portability : portable
7--
8module Network.BitTorrent.Peer.Status
9 ( PeerStatus(..)
10 , setChoking, setInterested
11 , initPeerStatus
12
13 , SessionStatus(..)
14 , initSessionStatus
15 , setClientStatus, setPeerStatus
16 , canUpload, canDownload
17
18 -- * Defaults
19 , defaultUnchokeSlots
20 ) where
21
22data PeerStatus = PeerStatus {
23 psChoking :: Bool
24 , psInterested :: Bool
25 }
26
27-- | Any session between peers starts as choking and not interested.
28initPeerStatus :: PeerStatus
29initPeerStatus = PeerStatus True False
30
31setChoking :: Bool -> PeerStatus -> PeerStatus
32setChoking b ps = ps { psChoking = b }
33
34setInterested :: Bool -> PeerStatus -> PeerStatus
35setInterested b ps = ps { psInterested = b }
36
37
38
39data SessionStatus = SessionStatus {
40 seClientStatus :: PeerStatus
41 , sePeerStatus :: PeerStatus
42 }
43
44initSessionStatus :: SessionStatus
45initSessionStatus = SessionStatus initPeerStatus initPeerStatus
46
47setClientStatus :: (PeerStatus -> PeerStatus) -> SessionStatus -> SessionStatus
48setClientStatus f ss = ss { seClientStatus = f (seClientStatus ss) }
49
50setPeerStatus :: (PeerStatus -> PeerStatus) -> SessionStatus -> SessionStatus
51setPeerStatus f ss = ss { sePeerStatus = f (sePeerStatus ss) }
52
53-- | Can the /client/ to upload to the /peer/?
54canUpload :: SessionStatus -> Bool
55canUpload SessionStatus { seClientStatus = client, sePeerStatus = peer} =
56 psInterested peer && not (psChoking client)
57
58-- | Can the /client/ download from the /peer/?
59canDownload :: SessionStatus -> Bool
60canDownload SessionStatus { seClientStatus = client, sePeerStatus = peer } =
61 psInterested client && not (psChoking peer)
62
63-- | Indicates have many peers are allowed to download from the client.
64defaultUnchokeSlots :: Int
65defaultUnchokeSlots = 4 \ No newline at end of file