CSR/spamdetect.js at master · BrokenDesign/CSR · GitHub

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 var authors=[];

var warned = [];

var banned = [];

var messagelog = [];


/**

 * Add simple spam protection to your discord server.

 * @param  {Bot} bot - The discord.js CLient/bot

 * @param  {object} options - Optional (Custom configuarion options)

 * @return {[type]}         [description]

 */


  module.exports = function (bot, options,callback) {
    // Set options
    const warnBuffer = (options && options.warnBuffer) || 3;
    const maxBuffer = (options && options.maxBuffer) || 5;
    const interval = (options && options.interval) || 1000;
    const warningMessage = (options && options.warningMessage) || "stop spamming or I'll whack your head off.";
    const banMessage = (options && options.banMessage) || "has been banned for spamming, anyone else?";
    const maxDuplicatesWarning = (options && options.maxDuplicatesWarning || 7);
    const maxDuplicatesBan = (options && options.maxDuplicatesBan || 10);
    const deleteMessagesAfterBanForPastDays = (options && options.deleteMessagesAfterBanForPastDays || 7);
    const exemptRoles = (options && options.exemptRoles) || []
    const exemptUsers = (options && options.exemptUsers) || []

    bot.on("message", msg => {
      if(!msg.guild){return}
        const ch=msg.guild.channels.find(x=>x.name==='irc')

      // bots don't ban do they?
      if (msg.author.bot) {
        return;
      }
      // Return immediately if user is exempt
      if(msg.member && msg.member.roles.some(r => exemptRoles.includes(r.name)))
      {
        return;
      }
      if(exemptUsers.includes(msg.author.tag)){
         return;
      }
      if ( (msg.author.id != bot.user.id) && msg.channel.guild && ch && msg.channel.id===ch.id) {
        var now = Math.floor(Date.now());
        authors.push({
          "time": now,
          "author": msg.author.id
        });
        messagelog.push({
          "message": msg.content,
          "author": msg.author.id
        });

        // Check how many times the same message has been sent.
        var msgMatch = 0;
        for (var i = 0; i < messagelog.length; i++) {
          if (messagelog[i].message == msg.content && (messagelog[i].author == msg.author.id) && (msg.author.id !== bot.user.id)) {
            msgMatch++;
          }
        }
        // Check matched count
        if (msgMatch == maxDuplicatesWarning && !warned.includes(msg.author.id)) {
          warn(msg, msg.author.id);
        }
        if (msgMatch == maxDuplicatesBan && !banned.includes(msg.author.id)) {
          callback(msg, msg.author);
        }

        var matched = 0;

        for (var i = 0; i < authors.length; i++) {
          //og >,- changed: <,+
          if (authors[i].time > now - interval) {
            matched++;
            if (matched == warnBuffer && !warned.includes(msg.author.id)) {
              warn(msg, msg.author.id);
            }
            else if (matched == maxBuffer) {
              if (!banned.includes(msg.author.id)) {
                callback(msg, msg.author);
              }
            }
          }
          //og <,- change >,+
          else if (authors[i].time < now - interval) {

            authors.splice(i);
            warned.splice(warned.indexOf(authors[i]));
            banned.splice(warned.indexOf(authors[i]));
            for(let i=messagelog.length-1; i>=0; i--){
              if(messagelog[i].author==msg.author.id){
                messagelog.splice(i,1)

              }
            }
          }
          if (messagelog.length >= 200) {
            messagelog.shift();
          }
        }
      }
    });

    /**
     * Warn a user
     * @param  {Object} msg
     * @param  {string} userid userid
     */
    function warn(msg, userid) {
      warned.push(msg.author.id);
      msg.channel.send(msg.author + " " + warningMessage);
    }

    /**
     * Ban a user by the user id
     * @param  {Object} msg
     * @param  {string} userid userid
     * @return {boolean} True or False
     */
    function ban(msg, userid) {
      for (var i = 0; i < messagelog.length; i++) {
        if (messagelog[i].author == msg.author.id) {
          messagelog.splice(i);
        }
      }

      banned.push(msg.author.id);

      var user = msg.channel.guild.members.find(member => member.user.id === msg.author.id);
      if (user) {
        user.ban(deleteMessagesAfterBanForPastDays).then((member) => {
          msg.channel.send(msg.author + " " +banMessage);
          return true;
       }).catch(() => {
          msg.channel.send("insufficient permission to kick " + msg.author + " for spamming.");
          return false;
       });
      }
    }

  }