256 lines
12 KiB
Python
256 lines
12 KiB
Python
import asyncio
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import discord
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import logging
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import re
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from typing import Callable, Awaitable, Dict, Any
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from src.core.base import MigrationContext
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logger = logging.getLogger(__name__)
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def clean_mentions(content: str, guild, user_mentions=None, role_mentions=None, role_map=None) -> str:
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if not content or not guild:
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return content
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def replace_user(match):
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uid = int(match.group(1))
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# 1. Try provided guild
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member = guild.get_member(uid)
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if member:
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return f"`@{member.display_name}`"
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# 2. Try message's user_mentions
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if user_mentions:
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for u in user_mentions:
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if u.id == uid:
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return f"`@{getattr(u, 'display_name', u.name)}`"
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# 3. Try global cache via guild.client
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if hasattr(guild, 'client'):
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user = guild.client.get_user(uid)
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if user:
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return f"`@{user.name}`"
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return match.group(0)
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def replace_role(match):
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rid = int(match.group(1))
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# 1. Try provided guild cache/list
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role = guild.get_role(rid) or discord.utils.get(guild.roles, id=rid)
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# 2. Try message's role_mentions
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if not role and role_mentions:
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role = discord.utils.get(role_mentions, id=rid)
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# 3. Try all guilds the client is aware of (fallback for cache issues)
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if not role and hasattr(guild, 'client'):
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for g in guild.client.guilds:
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role = g.get_role(rid)
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if role: break
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if role and role.name:
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return f"`@{role.name}`"
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# 4. Try provided role map
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if role_map and rid in role_map:
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return f"`@{role_map[rid]}`"
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return match.group(0)
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def replace_channel(match):
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cid = int(match.group(1))
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channel = guild.get_channel(cid)
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return f"#{channel.name}" if channel else match.group(0)
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content = re.sub(r'<@!?([0-9]+)>', replace_user, content)
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content = re.sub(r'<@&([0-9]+)>', replace_role, content)
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content = re.sub(r'<#([0-9]+)>', replace_channel, content)
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content = content.replace("@everyone", "`@everyone`").replace("@here", "`@here`")
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return content
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async def analyze_migration(context: MigrationContext, source_channel_id: int, after_message_id: int | None = None, progress_callback: Callable[[Dict[str, Any]], Awaitable[None]] | None = None) -> Dict[str, int]:
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"""
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Scans channel history to count messages, threads, and attachments.
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"""
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stats = {"messages": 0, "threads": 0, "attachments": 0}
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async for msg in context.discord_reader.fetch_message_history(source_channel_id, after_id=after_message_id):
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if not context.is_running:
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break
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# Count thread messages and markers even if parent is skipped
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if hasattr(msg, 'thread') and msg.thread:
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stats["threads"] += 1
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# Recursively count thread content
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thread_stats = await analyze_migration(context, msg.thread.id)
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stats["messages"] += thread_stats["messages"]
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stats["attachments"] += thread_stats["attachments"]
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stats["threads"] += thread_stats["threads"] # Nested threads (rare in Discord but possible in forum channels)
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# Consistent filtering with migrate_messages
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if msg.type not in [discord.MessageType.default, discord.MessageType.reply, discord.MessageType.thread_starter_message]:
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continue
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stats["messages"] += 1
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stats["attachments"] += len(msg.attachments)
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if progress_callback and stats["messages"] % 10 == 0:
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await progress_callback(stats)
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return stats
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async def migrate_messages(context: MigrationContext, source_channel_id: int, target_channel_id: str, after_message_id: int | None = None, progress_callback: Callable[[Dict[str, Any]], Awaitable[None]] | None = None) -> Dict[str, Any]:
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"""Migrate messages for a specific channel and returns detailed statistics."""
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stats = {
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"messages": 0,
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"attachments": 0,
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"threads": 0,
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"first_message_url": None,
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"last_message_url": None
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}
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try:
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async for msg in context.discord_reader.fetch_message_history(source_channel_id, after_id=after_message_id):
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if not context.is_running:
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break
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# Skip system messages like "pinned a message", etc.
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# We treat thread_starter_message (type 21) as our thread marker.
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if msg.type == discord.MessageType.thread_starter_message:
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content = f"> <<< THREAD: **{msg.channel.name}** >>>"
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elif msg.type not in [discord.MessageType.default, discord.MessageType.reply]:
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# If we are skipping the parent, we STILL need to check for a thread!
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if hasattr(msg, 'thread') and msg.thread:
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thread = msg.thread
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logger.info(f"Detected thread '{thread.name}' on skipped message {msg.id}")
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# Track thread entry
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stats["threads"] += 1
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# Migrate thread messages recursively
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thread_stats = await migrate_messages(
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context=context,
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source_channel_id=thread.id,
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target_channel_id=target_channel_id
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)
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stats["messages"] += thread_stats["messages"]
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stats["attachments"] += thread_stats["attachments"]
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stats["threads"] += thread_stats["threads"]
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# Send End Marker
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await context.fluxer_writer.send_marker(
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channel_id=target_channel_id,
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content=f"> <<< END OF THREAD >>>"
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)
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continue
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else:
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# Use custom clean_mentions with msg mentions for accuracy
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content = clean_mentions(msg.content, msg.guild, msg.mentions, msg.role_mentions, context.discord_reader.role_map)
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# Process attachments
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files = []
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attachments_to_process = list(msg.attachments)
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# Check if this message is forwarded
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# Discord flags: forwarded (is bit 28 / 0x10000000)
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is_forwarded = False
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if hasattr(msg.flags, 'forwarded'):
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is_forwarded = msg.flags.forwarded
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# If forwarded, the content and attachments might be in message_snapshots (discord.py 2.5+)
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# Note: If content was set by thread_starter_message, we don't overwrite it.
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if is_forwarded:
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logger.debug(f"Detected forwarded message: ID={msg.id}, Flags={msg.flags.value}")
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if hasattr(msg, 'message_snapshots') and msg.message_snapshots:
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# For now we handle the first snapshot
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snapshot = msg.message_snapshots[0]
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if not content: # Only update content if it wasn't already set (e.g., by thread_starter_message)
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content = snapshot.content
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if hasattr(msg, 'guild') and msg.guild:
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content = clean_mentions(
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content,
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msg.guild,
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snapshot.mentions if hasattr(snapshot, 'mentions') else None,
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snapshot.role_mentions if hasattr(snapshot, 'role_mentions') else None,
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context.discord_reader.role_map
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)
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# Add snapshot attachments to the list to process
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attachments_to_process.extend(snapshot.attachments)
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logger.debug(f"Found forwarded snapshot content: {content[:50]}... and {len(snapshot.attachments)} attachments")
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for att in attachments_to_process:
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try:
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att_data = await context.discord_reader.download_attachment(att)
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files.append({"filename": att.filename, "data": att_data})
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stats["attachments"] += 1
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except Exception as e:
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logger.error(f"Failed to download attachment {att.filename}: {e}")
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try:
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# Check if this message is a reply
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reply_to_fluxer_id = None
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if msg.reference and msg.reference.message_id:
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reply_to_fluxer_id = context.state.get_fluxer_message_id(target_channel_id, str(msg.reference.message_id))
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fluxer_msg_id = await context.fluxer_writer.send_message(
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channel_id=target_channel_id,
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author_name=msg.author.display_name,
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author_avatar_url=str(msg.author.display_avatar.url),
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content=content,
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timestamp=msg.created_at.strftime("%Y-%m-%d %H:%M:%S"),
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files=files if files else None,
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reply_to_message_id=reply_to_fluxer_id,
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is_forwarded=is_forwarded
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)
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if fluxer_msg_id:
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context.state.set_message_mapping(target_channel_id, str(msg.id), fluxer_msg_id)
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context.state.update_last_message_timestamp(target_channel_id, str(msg.created_at))
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context.state.update_last_message_id(target_channel_id, str(msg.id))
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stats["messages"] += 1
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context.state.increment_stats(target_channel_id, messages=1, files=len(files) if files else 0)
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# Check for associated thread (Normal case: parent message is migrated)
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if hasattr(msg, 'thread') and msg.thread:
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thread = msg.thread
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logger.info(f"Detected thread '{thread.name}' on message {msg.id}")
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# Track thread entry
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stats["threads"] += 1
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# Migrate thread messages recursively
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thread_stats = await migrate_messages(
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context=context,
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source_channel_id=thread.id,
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target_channel_id=target_channel_id
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)
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stats["messages"] += thread_stats["messages"]
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stats["attachments"] += thread_stats["attachments"]
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stats["threads"] += thread_stats["threads"]
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# Send End Marker
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await context.fluxer_writer.send_marker(
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channel_id=target_channel_id,
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content=f"> <<< END OF THREAD >>>"
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)
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# Update Link Tracking (but prevent threaded messages from overwriting the parent channel pointers)
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# The 'after_message_id' param usually means it's the main function call and not a thread recursive call
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if not stats["first_message_url"]:
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stats["first_message_url"] = msg.jump_url
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stats["last_message_url"] = msg.jump_url
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if progress_callback:
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await progress_callback(stats)
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except Exception as e:
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logger.error(f"Failed to process message {msg.id}: {e}")
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import traceback
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logger.error(traceback.format_exc())
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# Delay for rate limit safety
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await asyncio.sleep(context.config.migration.rate_limit_delay_seconds)
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except (KeyboardInterrupt, asyncio.CancelledError):
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context.is_running = False
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pass
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return stats
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