rename addOrAwait to getWantHandle (#97)

dagger/blockexchange/pendingblocks.nim

@@ -8,6 +8,7 @@
 ## those terms.
 
 import std/tables
+import std/sequtils
 
 import pkg/questionable
 import pkg/chronicles
@@ -19,18 +20,22 @@ import ../blocktype
 logScope:
   topics = "dagger blockexc pendingblocks"
 
+const
+  DefaultBlockTimeout* = 10.minutes
+
 type
   PendingBlocksManager* = ref object of RootObj
     blocks*: Table[Cid, Future[Block]] # pending Block requests
 
-proc addOrAwait*(
+proc getWantHandle*(
   p: PendingBlocksManager,
-  cid: Cid): Future[Block] {.async.} =
+  cid: Cid,
+  timeout = DefaultBlockTimeout): Future[Block] {.async.} =
   ## Add an event for a block
   ##
 
   if cid notin p.blocks:
-     p.blocks[cid] = newFuture[Block]()
+     p.blocks[cid] = newFuture[Block]().wait(timeout)
      trace "Adding pending future for block", cid
 
   try:
@@ -43,6 +48,12 @@ proc addOrAwait*(
   finally:
     p.blocks.del(cid)
 
+proc addOrAwait*(
+  p: PendingBlocksManager,
+  cid: Cid,
+  timeout = DefaultBlockTimeout): Future[Block] {.deprecated: "Use getWantHandle".} =
+  p.getWantHandle(cid, timeout)
+
 proc resolve*(
   p: PendingBlocksManager,
   blocks: seq[Block]) =
@@ -66,6 +77,17 @@ proc contains*(
   p: PendingBlocksManager,
   cid: Cid): bool = p.pending(cid)
 
+iterator wantList*(p: PendingBlocksManager): Cid =
+  for k in p.blocks.keys:
+    yield k
+
+iterator wantHandles*(p: PendingBlocksManager): Future[Block] =
+  for v in p.blocks.values:
+    yield v
+
+func len*(p: PendingBlocksManager): int =
+  p.blocks.len
+
 func new*(T: type PendingBlocksManager): T =
   T(
     blocks: initTable[Cid, Future[Block]]()