From eb8ace4ddda6e1139bc9aa737ee1ea4fcc4b2391 Mon Sep 17 00:00:00 2001
From: Matthias Bisping <matthias.bisping@iqser.com>
Date: Wed, 11 May 2022 16:38:36 +0200
Subject: [PATCH] refactoring

---
 pyinfra/server/bufferizer/lazy_bufferizer.py | 90 +++++++++++---------
 1 file changed, 48 insertions(+), 42 deletions(-)

diff --git a/pyinfra/server/bufferizer/lazy_bufferizer.py b/pyinfra/server/bufferizer/lazy_bufferizer.py
index a5cd89f..047b0f8 100644
--- a/pyinfra/server/bufferizer/lazy_bufferizer.py
+++ b/pyinfra/server/bufferizer/lazy_bufferizer.py
@@ -1,41 +1,16 @@
 import logging
 from collections import deque
-from itertools import chain
+from itertools import chain, takewhile
 
-from funcy import first
+from funcy import first, repeatedly, flatten
 
 from pyinfra.server.bufferizer.buffer import bufferize
-from pyinfra.server.dispatcher.dispatcher import Nothing
+from pyinfra.server.dispatcher.dispatcher import Nothing, is_not_nothing
+from pyinfra.server.utils import unpack
 
 logger = logging.getLogger(__name__)
 
 
-class Queue:
-    def __init__(self):
-        self.__queue = deque()
-
-    def append(self, package) -> None:
-        self.__queue.append(package)
-
-    def popleft(self):
-        return self.__queue.popleft() if self.__queue else Nothing
-
-    def __bool__(self):
-        return bool(self.__queue)
-
-
-# class QueueStreamer:
-#     def __init__(self, queue: Queue):
-#         self.queue = queue
-#
-#     def __call__(self):
-#         return self.stream_queue()
-#
-#     def stream_queue(self):
-#         yield from takewhile(is_not_nothing, repeatedly(self.queue.popleft))
-#         yield Nothing
-
-
 # class OutputBuffer:
 #     def __init__(self, fn, queue_streamer):
 #         self.fn = fn
@@ -75,6 +50,20 @@ class Queue:
 #         return bool(self.result_queue)
 
 
+class Queue:
+    def __init__(self):
+        self.__queue = deque()
+
+    def append(self, package) -> None:
+        self.__queue.append(package)
+
+    def popleft(self):
+        return self.__queue.popleft() if self.__queue else Nothing
+
+    def __bool__(self):
+        return bool(self.__queue)
+
+
 class InputOutputBuffer:
     def __init__(self, fn, buffer_size=3):
         self.fn = bufferize(fn, buffer_size=buffer_size, null_value=[])
@@ -88,7 +77,6 @@ class InputOutputBuffer:
 
     def compute(self, item):
         yield from self.fn(item)
-        yield Nothing
 
     def get_next(self):
         return first(chain(self.result_stream, [Nothing]))
@@ -96,25 +84,43 @@ class InputOutputBuffer:
 
 class QueueBufferCoupler:
     def __init__(self, queue: Queue, buffer: InputOutputBuffer):
-        self.queue = queue
+        # self.queue = queue
+        self.queue = QueueStreamer(queue)
         self.buffer = buffer
+        self.result_stream = self.compute()
 
     def __call__(self):
-        return first(self.compute_next())
+        return self.compute_next()
 
     def compute_next(self):
-        while True:
-            item = self.buffer.get_next()
+        return next(self.compute())
 
-            if item is Nothing:
+    def compute(self):
 
-                item = self.queue.popleft()
-                self.buffer.compute_next(item)
-                if item is Nothing:
-                    break
+        for qitem in self.queue.stream_queue():
 
-            else:
-                yield item
+            self.buffer.compute_next(qitem)
+            print("qitem", unpack(qitem) if qitem is not Nothing else qitem)
 
-        yield self.buffer.get_next()
+            for ritem in takewhile(is_not_nothing, repeatedly(self.buffer.get_next)):
 
+                print("ritem", unpack(ritem) if ritem is not Nothing else ritem)
+
+                yield ritem
+
+            if qitem is Nothing:
+                break
+
+        yield Nothing
+
+
+class QueueStreamer:
+    def __init__(self, queue: Queue):
+        self.queue = queue
+
+    def __call__(self):
+        return self.stream_queue()
+
+    def stream_queue(self):
+        yield from repeatedly(self.queue.popleft)
+        yield Nothing