rewrite: Initial rewrite skeleton.

Remove modules that will no longer be required.
Move pending modules to pending-rewrite folders.

bot/modules/pending-rewrite/todo/commands.py

@@ -0,0 +1,115 @@
+import asyncio
+import discord
+
+from cmdClient.checks import in_guild
+
+from .module import module
+from .Tasklist import Tasklist
+
+
+@module.cmd(
+    name="todo",
+    desc="Display and edit your personal To-Do list.",
+    group="Productivity",
+    flags=('add==', 'delete==', 'check==', 'uncheck==', 'edit==', 'text')
+)
+@in_guild()
+async def cmd_todo(ctx, flags):
+    """
+    Usage``:
+        {prefix}todo
+        {prefix}todo <tasks>
+        {prefix}todo add <tasks>
+        {prefix}todo delete <taskids>
+        {prefix}todo check <taskids>
+        {prefix}todo uncheck <taskids>
+        {prefix}todo edit <taskid> <new task>
+    Description:
+        Open your personal interactive TODO list with `{prefix}todo`, \
+            and start adding tasks by sending `add your_task_here`. \
+            Press ❔ to see more ways to use the interactive list.
+        You can also use the commands above to modify your TODOs (see the examples below).
+
+        You may add several tasks at once by writing them on different lines \
+        (type Shift-Enter to make a new line on the desktop client).
+    Examples::
+        {prefix}todo: Open your TODO list.
+        {prefix}todo My New task: Add `My New task`.
+        {prefix}todo delete 1, 3-5: Delete tasks `1, 3, 4, 5`.
+        {prefix}todo check 1, 2: Mark tasks `1` and `2` as done.
+        {prefix}todo edit 1 My new task: Edit task `1`.
+    """
+    tasklist_channels = ctx.guild_settings.tasklist_channels.value
+    if tasklist_channels and ctx.ch not in tasklist_channels:
+        visible = [channel for channel in tasklist_channels if channel.permissions_for(ctx.author).read_messages]
+        if not visible:
+            prompt = "The `todo` command may not be used here!"
+        elif len(visible) == 1:
+            prompt = (
+                "The `todo` command may not be used here! "
+                "Please go to {}."
+            ).format(visible[0].mention)
+        else:
+            prompt = (
+                "The `todo` command may not be used here! "
+                "Please go to one of the following.\n{}"
+            ).format(' '.join(vis.mention for vis in visible))
+        out_msg = await ctx.msg.reply(
+            embed=discord.Embed(
+                description=prompt,
+                colour=discord.Colour.red()
+            )
+        )
+        await asyncio.sleep(60)
+        try:
+            await out_msg.delete()
+            await ctx.msg.delete()
+        except discord.HTTPException:
+            pass
+        return
+
+    # TODO: Custom module, with pre-command hooks
+    tasklist = Tasklist.fetch_or_create(ctx, flags, ctx.author, ctx.ch)
+
+    keys = {
+        'add': (('add', ), tasklist.parse_add),
+        'check': (('check', 'done', 'complete'), tasklist.parse_check),
+        'uncheck': (('uncheck', 'uncomplete'), tasklist.parse_uncheck),
+        'edit': (('edit',), tasklist.parse_edit),
+        'delete': (('delete',), tasklist.parse_delete)
+    }
+
+    # Handle subcommands
+    cmd = None
+    args = ctx.args
+    splits = args.split(maxsplit=1)
+    if len(splits) > 1:
+        maybe_cmd = splits[0].lower()
+        for key, (aliases, _) in keys.items():
+            if maybe_cmd in aliases:
+                cmd = key
+                break
+
+    # Default to adding if no command given
+    if cmd:
+        args = splits[1].strip()
+    elif args:
+        cmd = 'add'
+
+    async with tasklist.interaction_lock:
+        # Run required parsers
+        for key, (_, func) in keys.items():
+            if flags[key] or cmd == key:
+                await func((flags[key] or args).strip())
+
+        if not (any(flags.values()) or args):
+            # Force a repost if no flags were provided
+            await tasklist.update(repost=True)
+        else:
+            # Delete if the tasklist already had a message
+            if tasklist.message:
+                try:
+                    await ctx.msg.delete()
+                except discord.HTTPException:
+                    pass
+            await tasklist.update()