add: edit post app command and modal

Author: mystique09

src/cogs/admin/edit_post.py

@@ -0,0 +1,55 @@
+from discord import Interaction, Message, NotFound
+from discord.app_commands import command
+from discord.app_commands.commands import describe
+from discord.ext.commands.bot import Bot
+from discord.ext.commands.cog import Cog, GroupCog
+
+from data.admin.config_auto import Config
+from ui.modals.edit_post import EditPostModal
+from utils.decorators import is_staff
+
+
+class EditPost(Cog):
+    def __init__(self, bot: Bot):
+        self.bot = bot
+        self.config = Config(self.bot.pool)
+
+    @is_staff()
+    @command(
+        name="post-edit",
+        description="A command to allow staff to edit an existing post created by the PPH bot",
+    )
+    @describe(message_id="The ID post/message to edit")
+    async def edit_post(self, interaction: Interaction, message_id: str):
+
+        if not interaction.channel_id:
+            return
+
+        try:
+            message = await interaction.channel.fetch_message(int(message_id))
+        except (ValueError, NotFound):
+            await interaction.response.send_message(
+                "Message not found in this channel.", ephemeral=True
+            )
+            return
+
+        if self.bot.user is not None and message.author.id != self.bot.user.id:
+            await interaction.response.send_message(
+                "Cannot edit message that isn't from PPH bot!", ephemeral=True
+            )
+            return
+
+        post_id = message.id
+        content = message.content
+        edit_post_modal = EditPostModal(
+            channel_id=interaction.channel_id,
+            post_id=post_id,
+            original_content=content,
+            bot=self.bot,
+        )
+
+        await interaction.response.send_modal(edit_post_modal)
+
+
+async def setup(bot: Bot):
+    await bot.add_cog(EditPost(bot))

src/ui/modals/edit_post.py

@@ -0,0 +1,29 @@
+from discord import CategoryChannel, ForumChannel, Interaction
+from discord.enums import TextStyle
+from discord.ext.commands.bot import Bot
+from discord.ui.modal import Modal
+from discord.ui.text_input import TextInput
+
+
+class EditPostModal(Modal, title="Edit post"):
+    message = TextInput(
+        label="Content",
+        placeholder="...",
+        required=True,
+        style=TextStyle.long,
+        max_length=4000,
+    )
+
+    def __init__(self, channel_id: int, post_id: int, original_content: str, bot: Bot):
+        super().__init__()
+
+        self.bot = bot
+        self.channel_id = channel_id
+        self.post_id = post_id
+        self.message.default = original_content
+
+    async def on_submit(self, interaction: Interaction, /) -> None:
+        channel = await self.bot.fetch_channel(self.channel_id)
+        message = await channel.fetch_message(self.post_id)
+        await message.edit(content=self.message.value)
+        await interaction.response.send_message("Post edited.", ephemeral=True)