feat: add /subscribe and /unsubscribe commands for order alerts

Single AlertSubscriptions cog with:
- /subscribe alerts <org_name> - subscribe channel to org alerts
- /subscribe alerts_user - subscribe channel to personal alerts
- /unsubscribe alerts - remove subscription from channel

Author: willemhs-amzn

cogs/subscribe.py

@@ -0,0 +1,93 @@
+import discord
+from discord.ext import commands
+from discord import app_commands
+import logging
+import aiohttp
+
+from cogs.registration import DISCORD_BACKEND_URL
+
+logger = logging.getLogger('SCMarketBot.SubscribeCog')
+
+
+class AlertSubscriptions(commands.Cog):
+    def __init__(self, bot):
+        self.bot = bot
+
+    subscribe_group = app_commands.Group(name="subscribe", description="Manage alert subscriptions")
+
+    @subscribe_group.command(name="alerts", description="Subscribe this channel to order/offer alerts for an organization")
+    @app_commands.describe(org_name="The spectrum ID of the organization")
+    async def subscribe_alerts(self, interaction: discord.Interaction, org_name: str):
+        await interaction.response.defer(ephemeral=True)
+        try:
+            async with aiohttp.ClientSession() as session:
+                async with session.post(
+                    f"{DISCORD_BACKEND_URL}/alert-subscriptions",
+                    json={
+                        "channel_id": str(interaction.channel_id),
+                        "guild_id": str(interaction.guild_id),
+                        "spectrum_id": org_name,
+                        "discord_id": str(interaction.user.id),
+                    },
+                ) as resp:
+                    data = await resp.json()
+                    if not resp.ok:
+                        await interaction.followup.send(f"❌ {data.get('error', 'Unknown error')}", ephemeral=True)
+                        return
+                    embed = discord.Embed(
+                        title="✅ Alert Subscription Active",
+                        description=f"This channel will now receive order and offer alerts for **{org_name}**.\n\nMembers with the **Claim Orders** permission can click the button on alerts to assign themselves.",
+                        color=0x10b881,
+                    )
+                    await interaction.followup.send(embed=embed, ephemeral=True)
+        except Exception as e:
+            logger.error(f"Failed to subscribe alerts: {e}")
+            await interaction.followup.send("❌ An error occurred.", ephemeral=True)
+
+    @subscribe_group.command(name="alerts_user", description="Subscribe this channel to your personal order/offer alerts")
+    async def subscribe_alerts_user(self, interaction: discord.Interaction):
+        await interaction.response.defer(ephemeral=True)
+        try:
+            async with aiohttp.ClientSession() as session:
+                async with session.post(
+                    f"{DISCORD_BACKEND_URL}/alert-subscriptions",
+                    json={
+                        "channel_id": str(interaction.channel_id),
+                        "guild_id": str(interaction.guild_id),
+                        "discord_id": str(interaction.user.id),
+                    },
+                ) as resp:
+                    data = await resp.json()
+                    if not resp.ok:
+                        await interaction.followup.send(f"❌ {data.get('error', 'Unknown error')}", ephemeral=True)
+                        return
+                    embed = discord.Embed(
+                        title="✅ Alert Subscription Active",
+                        description="This channel will now receive your personal order and offer alerts.",
+                        color=0x10b881,
+                    )
+                    await interaction.followup.send(embed=embed, ephemeral=True)
+        except Exception as e:
+            logger.error(f"Failed to subscribe user alerts: {e}")
+            await interaction.followup.send("❌ An error occurred.", ephemeral=True)
+
+    unsubscribe_group = app_commands.Group(name="unsubscribe", description="Remove subscriptions")
+
+    @unsubscribe_group.command(name="alerts", description="Remove order/offer alert subscription from this channel")
+    async def unsubscribe_alerts(self, interaction: discord.Interaction):
+        await interaction.response.defer(ephemeral=True)
+        try:
+            async with aiohttp.ClientSession() as session:
+                async with session.delete(
+                    f"{DISCORD_BACKEND_URL}/alert-subscriptions/{interaction.channel_id}",
+                ) as resp:
+                    if resp.status == 404:
+                        await interaction.followup.send("❌ No alert subscription found for this channel.", ephemeral=True)
+                        return
+                    if not resp.ok:
+                        await interaction.followup.send("❌ Failed to remove subscription.", ephemeral=True)
+                        return
+                    await interaction.followup.send("✅ Alert subscription removed from this channel.", ephemeral=True)
+        except Exception as e:
+            logger.error(f"Failed to unsubscribe alerts: {e}")
+            await interaction.followup.send("❌ An error occurred.", ephemeral=True)

main.py

@@ -17,6 +17,7 @@
 from cogs.order import order
 from cogs.registration import Registration
 from cogs.stock import stock
+from cogs.subscribe import AlertSubscriptions
 
 from util.config import Config
 from util.result import Result
@@ -41,6 +42,7 @@ async def setup_hook(self):
         await self.add_cog(Lookup(self))
         await self.add_cog(order(self))
         await self.add_cog(stock(self))
+        await self.add_cog(AlertSubscriptions(self))
 
         await self.tree.sync()