Remove syntax error exception, add help pages to some errors

src/pluralkit/bot/commands/__init__.py

@@ -12,9 +12,6 @@ logger = logging.getLogger("pluralkit.bot.commands")
 
 command_list = {}
 
-class InvalidCommandSyntax(Exception):
-    pass
-
 class NoSystemRegistered(Exception):
     pass
 
@@ -55,9 +52,6 @@ def command(cmd, usage=None, description=None, category=None, system_required=Tr
                     await client.send_message(message.channel, embed=embed)
             except NoSystemRegistered:
                 await client.send_message(message.channel, embed=utils.make_error_embed("No system registered to this account. Use `pk;system new` to register one."))
-            except InvalidCommandSyntax:
-                usage_str = "**Usage:** pk;{} {}".format(cmd, usage or "")
-                await client.send_message(message.channel, embed=utils.make_default_embed(usage_str))
             except Exception:
                 logger.exception("Exception while handling command {} (args={}, system={})".format(cmd, args, system.hid if system else "(none)"))
 
@@ -71,7 +65,7 @@ def member_command(cmd, usage=None, description=None, category=None, system_only
         async def wrapper(ctx: CommandContext, args):
             # Return if no member param
             if len(args) == 0:
-                raise InvalidCommandSyntax()
+                return embeds.error("You must pass a member name or ID.")
 
             # System is allowed to be none if not system_only
             system_id = ctx.system.id if ctx.system else None

src/pluralkit/bot/commands/member_commands.py

@@ -1,11 +1,10 @@
-import logging
 import re
 from datetime import datetime
 from typing import List
 from urllib.parse import urlparse
 
-from pluralkit.bot import utils, embeds
 from pluralkit.bot.commands import *
+from pluralkit.bot import help
 
 logger = logging.getLogger("pluralkit.commands")
 
@@ -16,7 +15,7 @@ async def member_info(ctx: MemberCommandContext, args: List[str]):
 @command(cmd="member new", usage="<name>", description="Adds a new member to your system.", category="Member commands")
 async def new_member(ctx: MemberCommandContext, args: List[str]):
     if len(args) == 0:
-        raise InvalidCommandSyntax()
+        return embeds.error("You must pass a member name or ID.", help=help.add_member)
 
     name = " ".join(args)
     bounds_error = utils.bounds_check_member_name(name, ctx.system.tag)
@@ -33,8 +32,8 @@ async def new_member(ctx: MemberCommandContext, args: List[str]):
 
 @member_command(cmd="member set", usage="<name|description|color|pronouns|birthdate|avatar> [value]", description="Edits a member property. Leave [value] blank to clear.", category="Member commands")
 async def member_set(ctx: MemberCommandContext, args: List[str]):
-    if len(args) == 0: 
+    if len(args) == 0:
-        raise InvalidCommandSyntax()
+        return embeds.error("You must pass a property name to set.", help=help.edit_member)
 
     allowed_properties = ["name", "description", "color", "pronouns", "birthdate", "avatar"]
     db_properties = {
@@ -48,7 +47,7 @@ async def member_set(ctx: MemberCommandContext, args: List[str]):
 
     prop = args[0]
     if prop not in allowed_properties:
-        return embeds.error("Unknown property {}. Allowed properties are {}.".format(prop, ", ".join(allowed_properties)))
+        return embeds.error("Unknown property {}. Allowed properties are {}.".format(prop, ", ".join(allowed_properties)), help=help.edit_member)
 
     if len(args) >= 2:
         value = " ".join(args[1:])
@@ -90,11 +89,11 @@ async def member_set(ctx: MemberCommandContext, args: List[str]):
                 if u.scheme in ["http", "https"] and u.netloc and u.path:
                     value = value
                 else:
-                    return embeds.error("Invalid URL.")
+                    return embeds.error("Invalid image URL.")
     else:
         # Can't clear member name
         if prop == "name":
-            return embeds.error("Can't clear member name.")
+            return embeds.error("You can't clear the member name.")
 
         # Clear from DB
         value = None
@@ -117,10 +116,10 @@ async def member_proxy(ctx: MemberCommandContext, args: List[str]):
         # Sanity checking
         example = " ".join(args)
         if "text" not in example:
-            return embeds.error("Example proxy message must contain the string 'text'.")
+            return embeds.error("Example proxy message must contain the string 'text'.", help=help.member_proxy)
 
         if example.count("text") != 1:
-            return embeds.error("Example proxy message must contain the string 'text' exactly once.")
+            return embeds.error("Example proxy message must contain the string 'text' exactly once.", help=help.member_proxy)
 
         # Extract prefix and suffix
         prefix = example[:example.index("text")].strip()
@@ -147,4 +146,4 @@ async def member_delete(ctx: MemberCommandContext, args: List[str]):
         await db.delete_member(ctx.conn, member_id=ctx.member.id)
         return embeds.success("Member deleted.")
     else:
-        return embeds.success("Member deletion cancelled.")
+        return embeds.error("Member deletion cancelled.")

src/pluralkit/bot/commands/message_commands.py

@@ -1,7 +1,7 @@
 import logging
 from typing import List
 
-from pluralkit.bot import utils, embeds
+from pluralkit.bot import utils, embeds, help
 from pluralkit.bot.commands import *
 
 logger = logging.getLogger("pluralkit.commands")
@@ -11,12 +11,12 @@ logger = logging.getLogger("pluralkit.commands")
          category="Message commands", system_required=False)
 async def message_info(ctx: CommandContext, args: List[str]):
     if len(args) == 0:
-        raise InvalidCommandSyntax()
+        return embeds.error("You must pass a message ID.", help=help.message_lookup)
 
     try:
         mid = int(args[0])
     except ValueError:
-        raise InvalidCommandSyntax()
+        return embeds.error("You must pass a valid number as a message ID.", help=help.message_lookup)
 
     # Find the message in the DB
     message = await db.get_message(ctx.conn, str(mid))

src/pluralkit/bot/commands/misc_commands.py

@@ -28,7 +28,7 @@ async def show_help(ctx: CommandContext, args: List[str]):
             else:
                 embed.description = text
     else:
-        raise InvalidCommandSyntax()
+        return embeds.error("Unknown help page '{}'.".format(category))
 
     return embed
 

src/pluralkit/bot/commands/switch_commands.py

@@ -7,7 +7,7 @@ import humanize
 
 import pluralkit.utils
 from pluralkit import Member
-from pluralkit.bot import utils, embeds
+from pluralkit.bot import utils, embeds, help
 from pluralkit.bot.commands import *
 
 logger = logging.getLogger("pluralkit.commands")
@@ -15,7 +15,7 @@ logger = logging.getLogger("pluralkit.commands")
 @command(cmd="switch", usage="<name|id> [name|id]...", description="Registers a switch and changes the current fronter.", category="Switching commands")
 async def switch_member(ctx: MemberCommandContext, args: List[str]):
     if len(args) == 0:
-        raise InvalidCommandSyntax()
+        return embeds.error("You must pass at least one member name or ID to register a switch to.", help=help.switch_register)
 
     members: List[Member] = []
     for member_name in args:
@@ -36,7 +36,7 @@ async def switch_member(ctx: MemberCommandContext, args: List[str]):
 
     # Also make sure there aren't any duplicates
     if len(set(member_ids)) != len(member_ids):
-        return embeds.error("Duplicate members in switch list.")
+        return embeds.error("Duplicate members in member list.")
 
     # Log the switch
     async with ctx.conn.transaction():
@@ -54,7 +54,7 @@ async def switch_out(ctx: MemberCommandContext, args: List[str]):
     # Get current fronters
     fronters, _ = await pluralkit.utils.get_fronter_ids(ctx.conn, system_id=ctx.system.id)
     if not fronters:
-        raise embeds.error("There's already no one in front.")
+        return embeds.error("There's already no one in front.")
 
     # Log it, and don't log any members
     await db.add_switch(ctx.conn, system_id=ctx.system.id)
@@ -63,7 +63,7 @@ async def switch_out(ctx: MemberCommandContext, args: List[str]):
 @command(cmd="switch move", usage="<time>", description="Moves the most recent switch to a different point in time.", category="Switching commands")
 async def switch_move(ctx: MemberCommandContext, args: List[str]):
     if len(args) == 0:
-        raise InvalidCommandSyntax()
+        return embeds.error("You must pass a time to move the switch to.", help=help.switch_move)
 
     # Parse the time to move to
     new_time = dateparser.parse(" ".join(args), languages=["en"], settings={

src/pluralkit/bot/commands/system_commands.py

@@ -6,7 +6,7 @@ import dateparser
 import humanize
 
 import pluralkit.utils
-from pluralkit.bot import embeds
+from pluralkit.bot import embeds, help
 from pluralkit.bot.commands import *
 
 logger = logging.getLogger("pluralkit.commands")
@@ -48,7 +48,7 @@ async def new_system(ctx: CommandContext, args: List[str]):
 @command(cmd="system set", usage="<name|description|tag|avatar> [value]", description="Edits a system property. Leave [value] blank to clear.", category="System commands")
 async def system_set(ctx: CommandContext, args: List[str]):
     if len(args) == 0:
-        raise InvalidCommandSyntax()
+        return embeds.error("You must pass a property name to set.", help=help.edit_system)
 
     allowed_properties = ["name", "description", "tag", "avatar"]
     db_properties = {
@@ -60,14 +60,14 @@ async def system_set(ctx: CommandContext, args: List[str]):
 
     prop = args[0]
     if prop not in allowed_properties:
-        raise embeds.error("Unknown property {}. Allowed properties are {}.".format(prop, ", ".join(allowed_properties)))
+        raise embeds.error("Unknown property {}. Allowed properties are {}.".format(prop, ", ".join(allowed_properties)), help=help.edit_system)
 
     if len(args) >= 2:
         value = " ".join(args[1:])
         # Sanity checking
         if prop == "tag":
             if len(value) > 32:
-                raise embeds.error("Can't have system tag longer than 32 characters.")
+                raise embeds.error("You can't have a system tag longer than 32 characters.")
 
             # Make sure there are no members which would make the combined length exceed 32
             members_exceeding = await db.get_members_exceeding(ctx.conn, system_id=ctx.system.id, length=32 - len(value) - 1)
@@ -90,7 +90,7 @@ async def system_set(ctx: CommandContext, args: List[str]):
                 if u.scheme in ["http", "https"] and u.netloc and u.path:
                     value = value
                 else:
-                    raise embeds.error("Invalid URL.")
+                    raise embeds.error("Invalid image URL.")
     else:
         # Clear from DB
         value = None
@@ -106,7 +106,7 @@ async def system_set(ctx: CommandContext, args: List[str]):
 @command(cmd="system link", usage="<account>", description="Links another account to your system.", category="System commands")
 async def system_link(ctx: CommandContext, args: List[str]):
     if len(args) == 0:
-        raise InvalidCommandSyntax()
+        return embeds.error("You must pass an account to link this system to.", help=help.link_account)
 
     # Find account to link
     linkee = await utils.parse_mention(ctx.client, args[0])
@@ -116,7 +116,7 @@ async def system_link(ctx: CommandContext, args: List[str]):
     # Make sure account doesn't already have a system
     account_system = await db.get_system_by_account(ctx.conn, linkee.id)
     if account_system:
-        return embeds.error("Account is already linked to a system (`{}`)".format(account_system.hid))
+        return embeds.error("The mentioned account is already linked to a system (`{}`)".format(account_system.hid))
 
     # Send confirmation message
     msg = await ctx.reply("{}, please confirm the link by clicking the ✅ reaction on this message.".format(linkee.mention))

src/pluralkit/bot/help.py

@@ -65,9 +65,11 @@ For example:
 
 You will need to confirm the deletion.""")
 member_proxy = ("Setting up member proxying", """To register a member for proxying, use the `pk;member proxy` command.
+
+You will need to pass an "example proxy" message containing "text", surrounded by the brackets or prefixes you want to select.
         
 For example:
-`pk;member proxy John [text]` - Registers John to use [square brackets] as tags.
+`pk;member proxy John [text]` - Registers John to use [square brackets] as proxy brackets.
 `pk;member proxy John J:text` - Registers John to use the prefix "J:".
 
 After setting proxy tags, you can use them in any message, and they'll be interpreted by the bot and proxied appropriately.""")