fix(backend): rich messages of the new telegram layer read as plain text instead of no text

backend/src/utils/read/message_view.py

@@ -22,6 +22,7 @@ from utils.read.models import (
     StickerView,
     WebPageView,
 )
+from utils.read.rich_text import rich_text
 
 _MEDIA_KEYS = (
     "photo",
@@ -382,6 +383,8 @@ def build_message_view(
     row: asyncpg.Record, raw: dict[str, Any], media: list[MediaRef]
 ) -> MessageView:
     base = _base_fields(row)
+    if base["text"] is None:
+        base["text"] = rich_text(raw.get("rich_message"))
     via_bot = raw.get("via_bot")
     sticker = _sticker(raw)
     try:

backend/src/utils/read/rich_text.py

@@ -0,0 +1,61 @@
+from typing import Any
+
+CELL_GAP = " | "
+_TEXT_KEYS = ("summary", "text", "expression", "credit")
+_INLINE_KEYS = ("text", "alternative_text", "expression")
+
+
+def _button(button: dict[str, Any]) -> str:
+    label = _inline(button.get("text"))
+    url = button.get("url")
+    return f"{label} ({url})" if isinstance(url, str) else label
+
+
+def _inline(value: object) -> str:
+    if isinstance(value, str):
+        return value
+    if isinstance(value, list):
+        return "".join(_inline(item) for item in value)
+    if not isinstance(value, dict):
+        return ""
+    button = value.get("button")
+    if isinstance(button, dict):
+        return _button(button)
+    return next((_inline(value[key]) for key in _INLINE_KEYS if key in value), "")
+
+
+def _children(block: dict[str, Any], key: str) -> list[Any]:
+    value = block.get(key)
+    return value if isinstance(value, list) else []
+
+
+def _row(row: object) -> str:
+    cells = row if isinstance(row, list) else []
+    return CELL_GAP.join(
+        _inline(cell.get("text")) for cell in cells if isinstance(cell, dict)
+    )
+
+
+def _block(block: object) -> list[str]:
+    if not isinstance(block, dict):
+        return []
+    lines = [_inline(block[key]) for key in _TEXT_KEYS if key in block]
+    lines += [_row(row) for row in _children(block, "cells")]
+    lines += [
+        _button(button)
+        for button in _children(block, "buttons")
+        if isinstance(button, dict)
+    ]
+    for key in ("items", "blocks"):
+        for child in _children(block, key):
+            lines += _block(child)
+    lines += _block(block.get("caption"))
+    lines = [line for line in lines if line]
+    label = block.get("label")
+    if isinstance(label, str) and lines:
+        lines[0] = f"{label} {lines[0]}"
+    return lines
+
+
+def rich_text(rich: object) -> str | None:
+    return "\n".join(_block(rich)) or None