feature (sponsors): Add sponsor command.

Add new sponsor prompts.
Add new sponsor command.
Add `sponsor_text` table.
Add sponsor global config settings.
Update `Setting.command` to use new `widget`.
Add custom `cmd_str` support to `Message` `SettingType`.

bot/modules/sponsors/config.py

@@ -0,0 +1,70 @@
+from cmdClient.checks import is_owner
+
+from settings.base import Setting, ColumnData, ObjectSettings
+from settings.setting_types import Message, String
+
+from meta import client
+from utils.lib import DotDict
+
+from .data import sponsor_text
+
+
+class SponsorSettings(ObjectSettings):
+    settings = DotDict()
+    pass
+
+
+@SponsorSettings.attach_setting
+class sponsor_prompt(String, ColumnData, Setting):
+    attr_name = 'sponsor_prompt'
+    _default = "Type {prefix}sponsors to check our wonderful partners!"
+
+    write_ward = is_owner
+
+    display_name = 'sponsor_prompt'
+    desc = "Text to send after core commands to encourage checking `sponsors`."
+    long_desc = (
+        "Text posted after several commands to encourage users to check the `sponsors` command. "
+        "Occurences of `{{prefix}}` will be replaced by the bot prefix."
+    )
+
+    _quote = False
+
+    _data_column = 'prompt_text'
+    _table_interface = sponsor_text
+    _id_column = 'ID'
+    _upsert = True
+    _create_row = True
+
+    @classmethod
+    def _data_to_value(cls, id, data, **kwargs):
+        if data:
+            return data.replace("{prefix}", client.prefix)
+        else:
+            return None
+
+
+@SponsorSettings.attach_setting
+class sponsor_message(Message, ColumnData, Setting):
+    attr_name = 'sponsor_message'
+    _default = '{"content": "Coming Soon!"}'
+
+    write_ward = is_owner
+
+    display_name = 'sponsor_message'
+    desc = "`sponsors` command response."
+
+    long_desc = (
+        "Message to reply with when a user runs the `sponsors` command."
+    )
+
+    _data_column = 'command_response'
+    _table_interface = sponsor_text
+    _id_column = 'ID'
+    _upsert = True
+    _create_row = True
+
+    _cmd_str = "{prefix}sponsors --edit"
+
+
+settings = SponsorSettings(0)