Add basic support for callout blocks

Currently, it just prints the content of the block but ignores the emoji
and color.

Closes #26

README.md

@@ -74,6 +74,7 @@ Classes that can be extended (case sensitive):
 - Bookmark
 - BulletedList
 - BulletedListItem
+- CalloutBlock
 - ChildPageBlock
 - CodeBlockFenced
 - Divider
@@ -118,6 +119,7 @@ Here are some features we're planning to add in the future:
 
 - Add support for exporting pages
 - Add basic support for links
+- Add support for callout blocks
 
 ### v0.2.3
 

n2y/blocks.py

@@ -89,6 +89,8 @@ def parse_block(client: Client, block, get_children=True):
         return Toggle(client, block, get_children)
     elif block['type'] == "equation":
         return Equation(client, block, get_children)
+    elif block['type'] == "callout":
+        return CalloutBlock(client, block, get_children)
     else:
         # TODO: add remaining block types
         raise NotImplementedError(f'Unknown block type: "{block["type"]}"')
@@ -167,9 +169,9 @@ def to_pandoc(self):
         if children:
             result = [Para(content)]
             result.extend(children)
-            return result
         else:
-            return Para(content)
+            result = Para(content)
+        return result
 
 
 class BulletedListItem(Block):
@@ -361,6 +363,22 @@ def to_pandoc(self):
         return output
 
 
+class CalloutBlock(Block):
+    def __init__(self, client: Client, block, get_children=True):
+        super().__init__(client, block, get_children)
+        self.text = RichTextArray(self.text)
+
+    def to_pandoc(self):
+        content = self.text.to_pandoc()
+        children = super().to_pandoc()
+        if children:
+            result = [Para(content)]
+            result.extend(children)
+        else:
+            result = Para(content)
+        return result
+
+
 class File:
     """
     See https://developers.notion.com/reference/file-object

tests/test_end_to_end.py

@@ -67,6 +67,7 @@ def test_all_blocks_page_to_markdown(tmp_path):
     assert "### Heading 3" in lines
     assert "-   List block" in lines
     assert "1.  Number list block" in lines
+    assert "Callout block" in lines
     # TODO: add more blocks to the document, along with assertions
 
     # "Unknown.jpeg" is a file block in the Notion page