Link preview

docs/conf.py

@@ -13,13 +13,10 @@
 # import os
 # import sys
 # sys.path.insert(0, os.path.abspath("."))
-
-import datetime
-
 # -- Project information -----------------------------------------------------
 
 project = "aiogram-dialog"
-copyright = f"{datetime.date.today().year}, Tishka17"
+copyright = "%Y, Tishka17"
 author = "Tishka17"
 master_doc = "index"
 

docs/widgets/index.rst

@@ -4,13 +4,14 @@ Widgets and Rendering
 Base information
 ********************
 
-Currently there are 4 kinds of widgets: :ref:`texts <text_widgets>`, :ref:`keyboards <keyboard_widgets>`,
-:ref:`input <input_widgets>`, :ref:`media<media_widgets>` and you can create your own :ref:`widgets<custom_widgets>`.
+Currently there are 5 kinds of widgets: :ref:`texts <text_widgets>`, :ref:`keyboards <keyboard_widgets>`,
+:ref:`input <input_widgets>`, :ref:`media<media_widgets>`, :ref:`link preview<link_preview>` and you can create your own :ref:`widgets<custom_widgets>`.
 
 * **Texts** used to render text anywhere in dialog. It can be message text, button title and so on.
 * **Keyboards** represent parts of ``InlineKeyboard``
 * **Media** represent media attachment to message
 * **Input** allows to process incoming messages from user. Is has no representation.
+* **Link Preview** used to manage link previews in messages.
 
 Widgets can display static (e.g. ``Const``) and dynamic (e.g. ``Format``) content. To use dynamic data you have to set it. See :ref:`passing data <passing_data>`.
 
@@ -37,5 +38,6 @@ Also there are 2 general types:
     keyboard/index
     input/index
     media/index
+    link_preview/index
     hiding/index
-    custom_widgets/index
+    custom_widgets/index

docs/widgets/link_preview/example.py

@@ -0,0 +1,27 @@
+from aiogram.filters.state import State, StatesGroup
+
+from aiogram_dialog import Window
+from aiogram_dialog.widgets.link_preview import LinkPreview
+from aiogram_dialog.widgets.text import Const
+
+
+class SG(StatesGroup):
+    MAIN = State()
+    SECOND = State()
+
+
+window = Window(
+    Const("https://nplus1.ru/news/2024/05/23/voyager-1-science-data"),
+    LinkPreview(is_disabled=True),
+    state=SG.MAIN,
+)
+
+second_window = Window(
+    Const("some text"),
+    LinkPreview(
+        url=Const("https://nplus1.ru/news/2024/05/23/voyager-1-science-data"),
+        prefer_small_media=True,
+        show_above_text=True,
+    ),
+    state=SG.MAIN,
+)

docs/widgets/link_preview/index.rst

@@ -0,0 +1,23 @@
+.. _link_preview:
+
+LinkPreview
+*************
+
+The **LinkPreview** widget is used to manage link previews in messages.
+
+Parameters:
+
+* ``url``: A ``TextWidget`` with URL to be used in the link preview. If not provided, the first URL found in the message will be used.
+* ``is_disabled``: that controls whether the link preview is displayed. If ``True``, the preview will be disabled.
+* ``prefer_small_media``: that controls if the media in the link preview should be displayed in a smaller size. Ignored if media size change is not supported.
+* ``prefer_large_media``: that controls if the media in the link preview should be enlarged. Ignored if media size change is not supported.
+* ``show_above_text``: that specifies whether the link preview should be displayed above the message text. If ``True``, link preview be displayed above the message text.
+
+
+Code example:
+
+.. literalinclude:: ./example.py
+
+.. autoclass:: aiogram_dialog.widgets.link_preview.LinkPreview
+   :special-members: __init__
+   :members: render_link_preview, _render_link_preview

example/loading.py

@@ -17,6 +17,7 @@
     setup_dialogs,
 )
 from aiogram_dialog.widgets.kbd import Button
+from aiogram_dialog.widgets.link_preview import LinkPreview
 from aiogram_dialog.widgets.text import Const, Multi, Progress
 
 API_TOKEN = os.getenv("BOT_TOKEN")
@@ -75,6 +76,7 @@ async def background(callback: CallbackQuery, manager: BaseDialogManager):
     Window(
         Const("Press button to start processing"),
         Button(Const("Start"), id="start", on_click=start_bg),
+        LinkPreview(url=Const("http://ya.ru")),
         state=MainSG.main,
     ),
 )

example/mega/bot.py

@@ -11,6 +11,7 @@
 from bot_dialogs.calendar import calendar_dialog
 from bot_dialogs.counter import counter_dialog
 from bot_dialogs.layouts import layouts_dialog
+from bot_dialogs.link_preview import link_preview_dialog
 from bot_dialogs.main import main_dialog
 from bot_dialogs.mutltiwidget import multiwidget_dialog
 from bot_dialogs.reply_buttons import reply_kbd_dialog
@@ -68,6 +69,7 @@ async def on_unknown_intent(event: ErrorEvent, dialog_manager: DialogManager):
     multiwidget_dialog,
     switch_dialog,
     reply_kbd_dialog,
+    link_preview_dialog,
 )
 
 

example/mega/bot_dialogs/link_preview.py

@@ -0,0 +1,83 @@
+from aiogram_dialog import (
+    Dialog,
+    Window,
+)
+from aiogram_dialog.widgets.kbd import SwitchTo
+from aiogram_dialog.widgets.link_preview import LinkPreview
+from aiogram_dialog.widgets.text import Const, Format
+
+from . import states
+from .common import MAIN_MENU_BUTTON
+
+
+async def links_getter(**_):
+    return {
+        "main": "https://en.wikipedia.org/wiki/HTML_element",
+        "photo": "https://en.wikipedia.org/wiki/Hyperlink",
+    }
+
+
+LinkPreview_MAIN_MENU_BUTTON = SwitchTo(
+    text=Const("Back"), id="back", state=states.LinkPreview.MAIN,
+)
+COMMON_TEXT = Format(
+    "This is demo of different link preview options.\n"
+    "Link in text: {main}\n"
+    "Link in preview can be different\n\n"
+    "Current mode is:",
+)
+
+BACK = SwitchTo(Const("back"), "_back", states.LinkPreview.MAIN)
+
+link_preview_dialog = Dialog(
+    Window(
+        COMMON_TEXT,
+        Format("Default"),
+        SwitchTo(
+            Const("disable"), "_disable", states.LinkPreview.IS_DISABLED,
+        ),
+        SwitchTo(
+            Const("prefer small media"), "_prefer_small_media",
+            states.LinkPreview.SMALL_MEDIA,
+        ),
+        SwitchTo(
+            Const("prefer large media"), "_prefer_large_media",
+            states.LinkPreview.LARGE_MEDIA,
+        ),
+        SwitchTo(
+            Const("show above text"), "_show_above_text",
+            states.LinkPreview.SHOW_ABOVE_TEXT,
+        ),
+        MAIN_MENU_BUTTON,
+        state=states.LinkPreview.MAIN,
+    ),
+    Window(
+        COMMON_TEXT,
+        Const("is_disabled=True"),
+        LinkPreview(is_disabled=True),
+        LinkPreview_MAIN_MENU_BUTTON,
+        state=states.LinkPreview.IS_DISABLED,
+    ),
+    Window(
+        COMMON_TEXT,
+        Const("prefer_small_media=True"),
+        LinkPreview(Format("{photo}"), prefer_small_media=True),
+        LinkPreview_MAIN_MENU_BUTTON,
+        state=states.LinkPreview.SMALL_MEDIA,
+    ),
+    Window(
+        COMMON_TEXT,
+        Const("prefer_large_media=True"),
+        LinkPreview(Format("{photo}"), prefer_large_media=True),
+        LinkPreview_MAIN_MENU_BUTTON,
+        state=states.LinkPreview.LARGE_MEDIA,
+    ),
+    Window(
+        COMMON_TEXT,
+        Const("show_above_text=True"),
+        LinkPreview(Format("{photo}"), show_above_text=True),
+        LinkPreview_MAIN_MENU_BUTTON,
+        state=states.LinkPreview.SHOW_ABOVE_TEXT,
+    ),
+    getter=links_getter,
+)

example/mega/bot_dialogs/main.py

@@ -44,6 +44,11 @@
             id="switch",
             state=states.Switch.MAIN,
         ),
+        Start(
+            text=Const("🔗 Link Preview"),
+            id="linkpreview",
+            state=states.LinkPreview.MAIN,
+        ),
         Start(
             text=Const("⌨️ Reply keyboard"),
             id="reply",

example/mega/bot_dialogs/states.py

@@ -52,3 +52,11 @@ class Switch(StatesGroup):
     MAIN = State()
     INPUT = State()
     LAST = State()
+
+
+class LinkPreview(StatesGroup):
+    MAIN = State()
+    IS_DISABLED = State()
+    SMALL_MEDIA = State()
+    LARGE_MEDIA = State()
+    SHOW_ABOVE_TEXT = State()

src/aiogram_dialog/api/entities/new_message.py

@@ -7,6 +7,7 @@
     Chat,
     ForceReply,
     InlineKeyboardMarkup,
+    LinkPreviewOptions,
     ReplyKeyboardMarkup,
     ReplyKeyboardRemove,
 )
@@ -43,5 +44,5 @@ class NewMessage:
     reply_markup: Optional[MarkupVariant] = None
     parse_mode: Optional[str] = None
     show_mode: ShowMode = ShowMode.AUTO
-    disable_web_page_preview: Optional[bool] = None
     media: Optional[MediaAttachment] = None
+    link_preview_options: Optional[LinkPreviewOptions] = None

src/aiogram_dialog/api/internal/__init__.py

@@ -4,7 +4,7 @@
     "CALLBACK_DATA_KEY", "CONTEXT_KEY", "EVENT_SIMULATED",
     "STACK_KEY", "STORAGE_KEY",
     "ButtonVariant", "DataGetter", "InputWidget", "KeyboardWidget",
-    "MediaWidget", "RawKeyboard", "TextWidget", "Widget",
+    "LinkPreviewWidget", "MediaWidget", "RawKeyboard", "TextWidget", "Widget",
     "WindowProtocol",
 ]
 
@@ -24,6 +24,7 @@
     DataGetter,
     InputWidget,
     KeyboardWidget,
+    LinkPreviewWidget,
     MediaWidget,
     RawKeyboard,
     TextWidget,

src/aiogram_dialog/api/internal/widgets.py

@@ -12,6 +12,7 @@
     CallbackQuery,
     InlineKeyboardButton,
     KeyboardButton,
+    LinkPreviewOptions,
     Message,
 )
 
@@ -41,6 +42,16 @@ async def render_text(
         raise NotImplementedError
 
 
+@runtime_checkable
+class LinkPreviewWidget(Widget, Protocol):
+    @abstractmethod
+    async def render_link_preview(
+            self, data: dict, manager: DialogManager,
+    ) -> Optional[LinkPreviewOptions]:
+        """Create link preview."""
+        raise NotImplementedError
+
+
 ButtonVariant = Union[InlineKeyboardButton, KeyboardButton]
 RawKeyboard = list[list[ButtonVariant]]
 

src/aiogram_dialog/manager/message_manager.py

@@ -129,10 +129,13 @@ def need_voice(self, new_message: NewMessage) -> bool:
     def _message_changed(
             self, new_message: NewMessage, old_message: OldMessage,
     ) -> bool:
-        if new_message.text != old_message.text:
-            return True
-        # we cannot actually compare reply keyboards
-        if new_message.reply_markup or old_message.has_reply_keyboard:
+        if (
+            (new_message.text != old_message.text) or
+            # we cannot actually compare reply keyboards
+            (new_message.reply_markup or old_message.has_reply_keyboard) or
+            # we do not know if link preview changed
+            new_message.link_preview_options
+        ):
             return True
 
         if self.had_media(old_message) != self.need_media(new_message):
@@ -348,7 +351,7 @@ async def edit_text(
             text=new_message.text,
             reply_markup=new_message.reply_markup,
             parse_mode=new_message.parse_mode,
-            disable_web_page_preview=new_message.disable_web_page_preview,
+            link_preview_options=new_message.link_preview_options,
         )
 
     async def edit_media(
@@ -363,7 +366,6 @@ async def edit_media(
             caption=new_message.text,
             reply_markup=new_message.reply_markup,
             parse_mode=new_message.parse_mode,
-            disable_web_page_preview=new_message.disable_web_page_preview,
             media=await self.get_media_source(new_message.media, bot),
             **new_message.media.kwargs,
         )
@@ -392,9 +394,9 @@ async def send_text(self, bot: Bot, new_message: NewMessage) -> Message:
             text=new_message.text,
             message_thread_id=new_message.thread_id,
             business_connection_id=new_message.business_connection_id,
-            disable_web_page_preview=new_message.disable_web_page_preview,
             reply_markup=new_message.reply_markup,
             parse_mode=new_message.parse_mode,
+            link_preview_options=new_message.link_preview_options,
         )
 
     async def send_media(self, bot: Bot, new_message: NewMessage) -> Message:

src/aiogram_dialog/widgets/link_preview/__init__.py

@@ -0,0 +1,3 @@
+__all__ = ["LinkPreviewBase", "LinkPreview"]
+
+from .base import LinkPreview, LinkPreviewBase