Rename threads to fibers

The config and command line options haven't been changed.

src/invidious/jobs/refresh_channels_job.cr

@@ -7,9 +7,9 @@ class Invidious::Jobs::RefreshChannelsJob < Invidious::Jobs::BaseJob
   end
 
   def begin
-    max_threads = config.channel_threads
+    max_fibers = config.channel_threads
-    lim_threads = max_threads
+    lim_fibers = max_fibers
-    active_threads = 0
+    active_fibers = 0
     active_channel = Channel(Bool).new
     backoff = 1.seconds
 
@@ -19,26 +19,26 @@ class Invidious::Jobs::RefreshChannelsJob < Invidious::Jobs::BaseJob
         rs.each do
           id = rs.read(String)
 
-          if active_threads >= lim_threads
+          if active_fibers >= lim_fibers
             if active_channel.receive
-              active_threads -= 1
+              active_fibers -= 1
             end
           end
 
-          active_threads += 1
+          active_fibers += 1
           spawn do
             begin
               logger.trace("RefreshChannelsJob: Fetching channel #{id}")
               channel = fetch_channel(id, db, config.full_refresh)
 
-              lim_threads = max_threads
+              lim_fibers = max_fibers
               db.exec("UPDATE channels SET updated = $1, author = $2, deleted = false WHERE id = $3", Time.utc, channel.author, id)
             rescue ex
               logger.error("RefreshChannelsJob: #{id} : #{ex.message}")
               if ex.message == "Deleted or invalid channel"
                 db.exec("UPDATE channels SET updated = $1, deleted = true WHERE id = $2", Time.utc, id)
               else
-                lim_threads = 1
+                lim_fibers = 1
                 logger.error("RefreshChannelsJob: #{id} : backing off for #{backoff}s")
                 sleep backoff
                 if backoff < 1.days

src/invidious/jobs/refresh_feeds_job.cr

@@ -7,8 +7,8 @@ class Invidious::Jobs::RefreshFeedsJob < Invidious::Jobs::BaseJob
   end
 
   def begin
-    max_threads = config.feed_threads
+    max_fibers = config.feed_threads
-    active_threads = 0
+    active_fibers = 0
     active_channel = Channel(Bool).new
 
     loop do
@@ -17,13 +17,13 @@ class Invidious::Jobs::RefreshFeedsJob < Invidious::Jobs::BaseJob
           email = rs.read(String)
           view_name = "subscriptions_#{sha256(email)}"
 
-          if active_threads >= max_threads
+          if active_fibers >= max_fibers
             if active_channel.receive
-              active_threads -= 1
+              active_fibers -= 1
             end
           end
 
-          active_threads += 1
+          active_fibers += 1
           spawn do
             begin
               # Drop outdated views

src/invidious/jobs/subscribe_to_feeds_job.cr

@@ -8,12 +8,12 @@ class Invidious::Jobs::SubscribeToFeedsJob < Invidious::Jobs::BaseJob
   end
 
   def begin
-    max_threads = 1
+    max_fibers = 1
     if config.use_pubsub_feeds.is_a?(Int32)
-      max_threads = config.use_pubsub_feeds.as(Int32)
+      max_fibers = config.use_pubsub_feeds.as(Int32)
     end
 
-    active_threads = 0
+    active_fibers = 0
     active_channel = Channel(Bool).new
 
     loop do
@@ -21,13 +21,13 @@ class Invidious::Jobs::SubscribeToFeedsJob < Invidious::Jobs::BaseJob
         rs.each do
           ucid = rs.read(String)
 
-          if active_threads >= max_threads.as(Int32)
+          if active_fibers >= max_fibers.as(Int32)
             if active_channel.receive
-              active_threads -= 1
+              active_fibers -= 1
             end
           end
 
-          active_threads += 1
+          active_fibers += 1
 
           spawn do
             begin