Add a generic view and button

The view implements an interaction check for allowed_users and allowed_roles.

The button deleted the message attached the the parent view on click.

4 files changed, 94 insertions, 2 deletions

diff --git a/botcore/utils/__init__.py b/botcore/utils/__init__.py
index fa389743..dfdd6df5 100644
--- a/botcore/utils/__init__.py
+++ b/botcore/utils/__init__.py
@@ -1,6 +1,6 @@
 """Useful utilities and tools for Discord bot development."""
 
-from botcore.utils import _monkey_patches, caching, channel, logging, members, regex, scheduling
+from botcore.utils import _monkey_patches, caching, channel, interactions, logging, members, regex, scheduling
 from botcore.utils._extensions import unqualify
 
 
@@ -24,6 +24,7 @@ __all__ = [
     apply_monkey_patches,
     caching,
     channel,
+    interactions,
     logging,
     members,
     regex,
diff --git a/botcore/utils/interactions.py b/botcore/utils/interactions.py
new file mode 100644
index 00000000..6d632c53
--- /dev/null
+++ b/botcore/utils/interactions.py
@@ -0,0 +1,86 @@
+from typing import Optional, Sequence
+
+from discord import ButtonStyle, Interaction, ui
+
+from botcore.utils.logging import get_logger
+
+log = get_logger(__name__)
+
+
+class ViewWithUserAndRoleCheck(ui.View):
+    """
+    A view that allows the original invoker and moderators to interact with it.
+
+    Args:
+        allowed_users: A sequence of user's ids who are allowed to interact with the view.
+        allowed_roles: A sequence of role ids that are allowed to interact with the view.
+        timeout: Timeout in seconds from last interaction with the UI before no longer accepting input.
+            If ``None`` then there is no timeout.
+    """
+
+    def __init__(
+        self,
+        *,
+        allowed_users: Sequence[int],
+        allowed_roles: Sequence[int],
+        timeout: Optional[float] = 180.0
+    ) -> None:
+        super().__init__(timeout=timeout)
+        self.allowed_users = allowed_users
+        self.allowed_roles = allowed_roles
+
+    async def interaction_check(self, interaction: Interaction) -> bool:
+        """
+        Ensure the user clicking the button is the view invoker, or a moderator.
+
+        Args:
+            interaction: The interaction that occurred.
+        """
+        if interaction.user.id in self.allowed_users:
+            log.trace(
+                "Allowed interaction by %s (%d) on %d as they are an allowed user.",
+                interaction.user,
+                interaction.user.id,
+                interaction.message.id,
+            )
+            return True
+
+        if any(role.id in self.allowed_roles for role in getattr(interaction.user, "roles", [])):
+            log.trace(
+                "Allowed interaction by %s (%d)on %d as they have an allowed role.",
+                interaction.user,
+                interaction.user.id,
+                interaction.message.id,
+            )
+            return True
+
+        await interaction.response.send_message("This is not your button to click!", ephemeral=True)
+        return False
+
+
+class DeleteMessageButton(ui.Button):
+    """
+    A button that can be added to a view to delete the message containing the view on click.
+
+    This button itself carries out no interaction checks, these should be done by the parent view.
+
+    See :obj:`botcore.utils.interactions.ViewWithUserAndRoleCheck` for a view that implements basic checks.
+
+    Args:
+        style (:literal-url:`ButtonStyle <https://discordpy.readthedocs.io/en/latest/interactions/api.html#discord.ButtonStyle>`):
+            The style of the button, set to ``ButtonStyle.secondary`` if not specified.
+        label: The label of the button, set to "Delete" if not specified.
+    """  # noqa: E501
+
+    def __init__(
+        self,
+        *,
+        style: ButtonStyle = ButtonStyle.secondary,
+        label: str = "Delete",
+        **kwargs
+    ):
+        super().__init__(style=style, label=label, **kwargs)
+
+    async def callback(self, interaction: Interaction) -> None:
+        """Delete the original message on button click."""
+        await interaction.delete_original_message()
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 9d74eee8..cbe37062 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -4,6 +4,11 @@
 Changelog
 =========
 
+- :release:`7.3.0 <16th July 2022>`
+- :feature:`103` Add a generic view :obj:`botcore.utils.interactions.ViewWithUserAndRoleCheck` that only allows specified users and roles to interaction with it
+- :feature:`103` Add a button :obj:`botcore.utils.interactions.DeleteMessageButton` that deletes the message attached to its parent view.
+
+
 - :release:`7.2.2 <9th July 2022>`
 - :bug:`98` Only close ``BotBase.stats._transport`` if ``BotBase.stats`` was created
 
diff --git a/pyproject.toml b/pyproject.toml
index ccb1a39d..cff654ca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "bot-core"
-version = "7.2.2"
+version = "7.3.0"
 description = "Bot-Core provides the core functionality and utilities for the bots of the Python Discord community."
 authors = ["Python Discord <[email protected]>"]
 license = "MIT"