Implement Good Boy Points

Gemfile

@@ -5,3 +5,4 @@ ruby ">=2.5.3"
 gem "discordrb", :git => 'https://github.com/swarley/discordrb.git', :branch => 'voice_websocket_update'
 gem "icunicode"
 gem "youtube-dl.rb"
+gem "sqlite3"

main.rb

@@ -7,6 +7,9 @@ require 'securerandom'
 require 'net/http'
 require 'json'
 require 'youtube-dl.rb'
+require 'sqlite3'
+
+db = SQLite3::Database.open 'tankbot.db'
 
 $settings = YAML.load(File.read "config.yaml")['settings']
 bot = Discordrb::Commands::CommandBot.new token: $settings['token'], prefix: $settings['prefix']
@@ -217,5 +220,54 @@ bot.command(:volume, description: "Sets the severity of currently playing 'music
     ""
 end
 
+bot.command(:give, description: "Give a user some Good Boy Points (GBP).") do |_event|
+    receiver = _event.message.mentions[0]
+    sender = _event.author
+    next 'You cannot give GBP to yourself.' if sender.id == receiver.id
+    result = db.query "SELECT remaining FROM gbp WHERE user_id=?", sender.id
+    first_result = result.next
+    if first_result
+        remaining = first_result[0]
+    else
+        remaining = $settings['gbp_per_week']
+        db.execute "INSERT INTO gbp VALUES (?, ?, ?)", sender.id, 0, $settings['gbp_per_week']
+    end
+    next 'No GBP left to give this week.' unless remaining > 0
+    result = db.query "SELECT received FROM gbp WHERE user_id=?", receiver.id
+    first_result = result.next
+    if first_result
+        received = first_result[0]
+    else
+        received = 0
+        db.execute "INSERT INTO gbp VALUES (?, ?, ?)", receiver.id, 0, $settings['gbp_per_week']
+    end
+    db.execute "UPDATE gbp SET received = ? WHERE user_id = ?", received + 1, receiver.id
+    db.execute "UPDATE gbp SET remaining = ? WHERE user_id = ?", remaining - 1, sender.id
+    "#{sender.mention} gave 1 GBP to #{receiver.mention}."
+end
+
+bot.command(:leaderboard, description: "Show who's got the most Good Boy Points (GBP).") do |_event|
+    results = db.query "SELECT user_id, received FROM gbp ORDER BY received DESC"
+    results.each_with_index.map{|row, i| "#{i + 1}. #{bot.users[row[0]].username} - #{row[1]}"}.join("\n")
+end
+
+bot.voice_state_update() do |_event|
+    user = _event.user
+    channel = _event.channel
+    if channel.id == $settings['naughty_corner']
+        # Deduct GBP
+        result = db.query "SELECT received FROM gbp WHERE user_id=?", user.id
+        first_result = result.next
+        if first_result
+            received = first_result[0]
+        else
+            received = 0
+            db.execute "INSERT INTO gbp VALUES (?, ?, ?)", receiver.id, 0, $settings['gbp_per_week']
+        end
+        next unless received > 0
+
+        db.execute "UPDATE gbp SET received = ? WHERE user_id = ?", received - 1, user.id
+    end
+end
 
 bot.run