fix addons not being found & show warning if cache is empty (fixes #77)

src/api/cfcache.nim

@@ -103,6 +103,13 @@ proc purge*(): void =
   except IOError:
     discard
 
+proc isEmpty*(): bool =
+  ## returns true if no addons & files are in cache.
+  for _ in walkDir(getCacheDir("pax")):
+    return false
+  return true
+
+
 template withCachedAddon*(c: untyped, projectId: int, body: untyped) =
   ## do something with a cached addon.
   let addon = getAddon(projectId)

src/api/cfclient.nim

@@ -113,7 +113,7 @@ proc fetchAddonFiles*(projectId: int): Future[seq[CfAddonFile]] {.async.} =
   return data
 
 proc fetchAddonFilesChunks(fileIds: seq[int], fallback = true): Future[seq[CfAddonFile]] {.async.} =
-  ## get all addons with their given `projectId`.
+  ## get all addons with their given `fileIds`.
   if fileIds.len == 0:
     return @[]
   try:
@@ -123,7 +123,7 @@ proc fetchAddonFilesChunks(fileIds: seq[int], fallback = true): Future[seq[CfAdd
   except CfApiError as e:
     # fallback to looking up the ids individually
     if fallback:
-      return all(fileIds.map((x) => fetchAddonFilesChunks(@[x], fallback = false))).await.flatten()
+      return all(fileIds.map((x) => fetchAddonFilesChunks(@[x], fallback = true))).await.flatten()
     raise newException(CfApiError, e.msg)
 
 proc fetchAddonFiles*(fileIds: seq[int], chunk = true): Future[seq[CfAddonFile]] {.async.} =

src/cmd/list.nim

@@ -1,6 +1,6 @@
 import std/[algorithm, asyncdispatch, sequtils, strutils, os, sugar]
 import common
-import ../api/[cfclient, cfcore]
+import ../api/[cfcache, cfclient, cfcore]
 import ../modpack/[manifest, modinfo]
 import ../term/log
 
@@ -12,6 +12,8 @@ proc paxList*(status: bool, info: bool): void =
   let manifest = readManifestFromDisk()
 
   let fileCount = manifest.files.len
+  if fileCount > 100 and isEmpty():
+    echoWarn "The cache is being built - this will take a while.."
   let mcMods: Future[seq[CfAddon]] = manifest.files.map((x) => x.projectId).fetchAddons
   let mcModFiles: Future[seq[CfAddonFile]] = manifest.files.map((x) => x.fileId).fetchAddonFiles