Rename modules

pytchat/tool/extract/patch.py

@@ -0,0 +1,54 @@
+from . import parser
+from . block import Block
+from typing import NamedTuple
+
+class Patch(NamedTuple):
+    """
+    Patch represents chunk of chat data
+    which is fetched by asyncdl.fetch_patch._fetch().
+    """
+    chats : list = []
+    continuation : str = None
+    first : int = None
+    last : int = None
+
+def fill(block:Block, patch:Patch):
+    block_end = block.end
+    if patch.last < block_end or block.is_last:
+        set_patch(block, patch)
+        return
+    for line in reversed(patch.chats):
+        line_offset = parser.get_offset(line)
+        if line_offset < block_end:
+            break
+        patch.chats.pop()
+    set_patch(block, patch._replace(
+        continuation = None,
+        last = line_offset
+        )
+    )
+    block.remaining=0
+    block.done=True
+
+
+def split(parent_block:Block, child_block:Block, patch:Patch):
+    parent_block.during_split = False
+    if patch.first <= parent_block.last:
+        ''' When patch overlaps with parent_block,
+        discard this block. '''
+        child_block.continuation = None
+        ''' Leave child_block.during_split == True 
+         to exclude from during_split sequence. '''
+        return    
+    child_block.during_split = False
+    child_block.first = patch.first
+    parent_block.end = patch.first
+    fill(child_block, patch)
+    
+
+def set_patch(block:Block, patch:Patch):
+    block.continuation = patch.continuation
+    block.chat_data.extend(patch.chats)
+    block.last = patch.last
+    block.remaining = block.end-block.last        
+