Added a way to spend money.

src/commands/subtract.rb

@@ -0,0 +1,52 @@
+# FrugalityBot
+# Copyright (C) 2026 Eri (csxkdv/nxkdv) nxkdv@thenight.club
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+module Commands
+    module Subtract
+        extend self
+
+        def register(bot, db)
+            bot.register_application_command(:subtract, 'Take money from the wallet', server_id: ENV['TEST_SERVER_ID']) do |cmd|
+                cmd.integer('amount', "The amount you're spending.", required: true)
+                cmd.string('reason', "Reason you're spending money. Leave empty for default.", required: false)
+            end
+
+            bot.application_command(:subtract) do |event|
+                amount = event.options['amount'].to_i
+                reason = event.options['reason'] ||= 'expense'
+
+                if amount <= 0
+                    event.respond(content: "You either have 0, or you can't spend negative money.", ephemeral: true)
+                    next
+                end
+                
+                user_id = event.user.id
+
+                current_balance = db.get_currency(user_id)
+
+                if current_balance < amount
+                    event.respond(content: "You can't buy that, you have **#{current_balance}** coins.", ephemeral: true)
+                    next
+                end
+
+                db.update_balance(user_id, -amount, reason)
+
+                new_balance = current_balance - amount
+                event.respond(content: "You spent **#{amount}** coins.\nReason: #{reason}\nYou now have: #{new_balance}")
+            end
+        end
+    end
+end