Cache local media on upload, fix media local echo

src/python/matrix_client.py

@@ -237,8 +237,13 @@ class MatrixClient(nio.AsyncClient):
             path, upload_item, encrypt=encrypt,
         )
 
+        await self.media_cache.create_media(url, path.read_bytes())
+
         kind = (mime or "").split("/")[0]
 
+        thumb_url:  str            = ""
+        thumb_info: Dict[str, Any] = {}
+
         content: dict = {
             "body": path.name,
             "info": {
@@ -266,13 +271,20 @@ class MatrixClient(nio.AsyncClient):
             )
 
             try:
-                thumb_url, thumb_info, thumb_crypt_dict = \
+                thumb_data, thumb_url, thumb_info, thumb_crypt_dict = \
                     await self.upload_thumbnail(
                         path, upload_item, is_svg=is_svg, encrypt=encrypt,
                     )
             except (UneededThumbnail, UnthumbnailableError):
                 pass
             else:
+                await self.media_cache.create_thumbnail(
+                    thumb_url,
+                    thumb_data,
+                    content["info"]["w"],
+                    content["info"]["h"],
+                )
+
                 if encrypt:
                     content["info"]["thumbnail_file"]  = {
                         "url": thumb_url,
@@ -331,6 +343,9 @@ class MatrixClient(nio.AsyncClient):
             media_duration   = content["info"].get("duration", 0),
             media_size       = content["info"]["size"],
             media_mime       = content["info"]["mimetype"],
+            thumbnail_url    = thumb_url,
+            thumbnail_width  = thumb_info.get("w", 0),
+            thumbnail_height = thumb_info.get("h", 0),
         )
 
         await self._send_message(room_id, uuid, content)
@@ -352,7 +367,7 @@ class MatrixClient(nio.AsyncClient):
             sender_name      = our_info.display_name,
             sender_avatar    = our_info.avatar_url,
             is_local_echo    = True,
-            local_event_type = event_type.__name__,
+            local_event_type = event_type,
             **event_fields,
         )
 
@@ -457,7 +472,7 @@ class MatrixClient(nio.AsyncClient):
         item:    Optional[Upload] = None,
         is_svg:  bool             = False,
         encrypt: bool             = False,
-    ) -> Tuple[str, Dict[str, Any], CryptDict]:
+    ) -> Tuple[bytes, str, Dict[str, Any], CryptDict]:
 
         png_modes = ("1", "L", "P", "RGBA")
 
@@ -511,6 +526,7 @@ class MatrixClient(nio.AsyncClient):
                     item.status = UploadStatus.UploadingThumbnail
 
                 return (
+                    data,
                     await self.upload(data, upload_mime, Path(path).name),
                     {
                         "w":        thumb.width,

src/python/media_cache.py

@@ -219,10 +219,21 @@ class MediaCache:
         self.downloads_dir.mkdir(parents=True, exist_ok=True)
 
 
+    async def create_media(self, mxc: str, data: bytes) -> None:
+        await Media(self, mxc, data, {}).create()
+
+
     async def get_media(self, mxc: str, crypt_dict: CryptDict = None) -> str:
         return str(await Media(self, mxc, None, crypt_dict).get())
 
 
+    async def create_thumbnail(
+        self, mxc: str, data: bytes, width: int, height: int,
+    ) -> None:
+        thumb = Thumbnail(self, mxc, data, {}, (round(width), round(height)))
+        await thumb.create()
+
+
     async def get_thumbnail(
         self, mxc: str, width: int, height: int, crypt_dict: CryptDict = None,
     ) -> str:

src/python/models/items.py

@@ -2,7 +2,7 @@ import re
 from dataclasses import dataclass, field
 from datetime import datetime
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Any, Dict, List, Optional, Tuple, Type
 from uuid import uuid4
 
 import lxml  # nosec
@@ -160,7 +160,7 @@ class Event(ModelItem):
     target_avatar: str = ""
 
     is_local_echo:    bool                      = False
-    local_event_type: str  = ""
+    local_event_type: Optional[Type[nio.Event]] = None
 
     media_url:        str            = ""
     media_title:      str            = ""
@@ -187,12 +187,20 @@ class Event(ModelItem):
 
     @property
     def event_type(self) -> str:
-        return self.local_event_type or type(self.source).__name__
+        if self.local_event_type:
+            return self.local_event_type.__name__
+
+        return type(self.source).__name__
 
     @property
     def links(self) -> List[str]:
-        if isinstance(self.source,
+        local_type    = self.local_event_type
-                      (nio.RoomMessageMedia, nio.RoomEncryptedMedia)):
+        media_classes = (nio.RoomMessageMedia, nio.RoomEncryptedMedia)
+
+        if local_type and issubclass(local_type, media_classes):
+            return [self.media_url]
+
+        if isinstance(self.source, media_classes):
             return [self.media_url]
 
         if not self.content.strip():