在 SQLite xp 系统上为奖励积分添加冷却时间

Posted 2023-03-07

【中文标题】在 SQLite xp 系统上为奖励积分添加冷却时间

【英文标题】：Adding a cooldown to awarding points on SQLite xp system

【发布时间】：2020-12-31 23:16:09

【问题描述】：

我希望通过每 60 秒只获得一次经验来改进我的积分系统。我尝试了一些东西，但没有一个真正接近。当前积分奖励代码为

client.on('ready', () => 
 // Check if the table "points" exists.
 const table = sql
  .prepare(
   "SELECT count(*) FROM sqlite_master WHERE type='table' AND name = 'scores';"
  )
  .get();
 if (!table['count(*)']) 
  // create and setup the database correctly.
  sql
   .prepare(
    'CREATE TABLE scores (id TEXT PRIMARY KEY, user TEXT, guild TEXT, points INTEGER, level INTEGER);'
   )
   .run();
  // "id" row is always unique and indexed.
  sql.prepare('CREATE UNIQUE INDEX idx_scores_id ON scores (id);').run();
  sql.pragma('synchronous = 1');
  sql.pragma('journal_mode = wal');
 

 // get and set the score data.
 client.getScore = sql.prepare(
  'SELECT * FROM scores WHERE user = ? AND guild = ?'
 );
 client.setScore = sql.prepare(
  'INSERT OR REPLACE INTO scores (id, user, guild, points, level) VALUES (@id, @user, @guild, @points, @level);'
 );
);
client.on('message', (message) => 
 if (message.author.bot) return;
 let score;
 if (message.guild) 
  score = client.getScore.get(message.author.id, message.guild.id);
  if (!score) 
   score = 
    id: `$message.guild.id-$message.author.id`,
    user: message.author.id,
    guild: message.guild.id,
    points: 0,
    level: 1,
   ;
  
  score.points++;
  const curLevel = Math.floor(0.2 * Math.sqrt(score.points));
  if (score.level < curLevel) 
   score.level++;
   client.channels.cache
    .get('738662532700700719')
    .send(`$message.author has leveled up to level **$curLevel**!`);
  
  client.setScore.run(score);
 

 if (message.content.indexOf(config.prefix) !== 0) return;

 const args = message.content
  .slice(config.prefix.length)
  .trim()
  .split(/ +/g);
 const command = args.shift().toLowerCase();
);

【参考方案1】：

我想到的是存储您上次给用户积分的时间戳。然后，每次您想为新消息奖励用户更多积分时，请检查当前时间是否比您上次为用户分配积分的时间晚了 60 秒以上。

看看下面的示例代码并试一试。它可能需要调整，因为我对 SQLite 没有真正的经验，但我会在下面链接我使用的资源。

client.on('ready', () => 
 // Check if the table "points" exists.
 const table = sql
  .prepare(
   "SELECT count(*) FROM sqlite_master WHERE type='table' AND name = 'scores';"
  )
  .get();
 if (!table['count(*)']) 
  // create and setup the database correctly.
  // Includes the new column 'lastAwardedDate'.
  sql
   .prepare(
    'CREATE TABLE scores (id TEXT PRIMARY KEY, user TEXT, guild TEXT, points INTEGER, level INTEGER, lastAwardedDate TEXT);'
   )
   .run();
  // "id" row is always unique and indexed.
  sql.prepare('CREATE UNIQUE INDEX idx_scores_id ON scores (id);').run();
  sql.pragma('synchronous = 1');
  sql.pragma('journal_mode = wal');
 

 // get and set the score data.
 client.getScore = sql.prepare(
  'SELECT * FROM scores WHERE user = ? AND guild = ?'
 );
 client.setScore = sql.prepare(
  'INSERT OR REPLACE INTO scores (id, user, guild, points, level, lastAwardedDate) VALUES (@id, @user, @guild, @points, @level, @lastAwardedDate);'
 );
);

// Define a constant value for the delay (in ms).
const pointDelay = 60 * 1000;

client.on('message', (message) => 
 if (message.author.bot) return;
 let score;
 if (message.guild) 
  score = client.getScore.get(message.author.id, message.guild.id);
  if (!score) 
   score = 
    id: `$message.guild.id-$message.author.id`,
    user: message.author.id,
    guild: message.guild.id,
    points: 0,
    level: 1,
   ;
   else 
   // Check if the current time minus the last awarded time is less than the delay.
   if (new Date() - Date.parse(score.lastAwardedDate) < pointDelay) 
    return;
   
  
  score.points++;
  score.lastAwardedDate = new Date().toString();
  const curLevel = Math.floor(0.2 * Math.sqrt(score.points));
  if (score.level < curLevel) 
   score.level++;
   client.channels.cache
    .get('738662532700700719')
    .send(`$message.author has leveled up to level **$curLevel**!`);
  
  client.setScore.run(score);
 

 if (message.content.indexOf(config.prefix) !== 0) return;

 const args = message.content
  .slice(config.prefix.length)
  .trim()
  .split(/ +/g);
 const command = args.shift().toLowerCase();
);

我使用的来源：

SQLite Date & Time Date.toISOString

【讨论】：

您好，谢谢您的回复 - 它非常有用！我现在遇到了 client.setScore.run(score); 的问题。我收到“TypeError：SQLite3 只能绑定数字、字符串、bigint、缓冲区和空值”的持续错误。你能解释一下为什么会这样吗？

就像我说的，我对 SQLite 没有太多经验，但如果我猜测的话，我认为 score.lastAwardedDate = new Date(); 行可能会导致问题。我猜 SQL 正在尝试将其保存为 Date 对象，而不是先将其解析为字符串。尝试将该行更改为score.lastAwardedDate = new Date().toString();，看看它是否有效