amazonlink.js

function AmazonLinker() {
  this.initialize();
}

AmazonLinker.prototype = {
  amazon_url_regexp: /(http:\/\/www\.amazon\.(?:com|co\.jp))\/(.+)/,
  active_mode_interval: 500,
  inactive_mode_interval: 10 * 1000,
  shift_to_inactive_mode_timeout: 10 * 60 * 1000,

  shift_to_inactive_mode_timer_id: null,

  initialize: function() {
    this.interval = this.inactive_mode_interval;
    this.before_text = null;
    this.register_watch_handler();
  },

  watch_clipboard: function() {
    var text = clipboard.text;
    if (text != this.before_text) {
      this.short_amazon_link(text);
      this.before_text = text;
    }
    this.register_watch_handler();
  },

  register_watch_handler: function() {
    var self = this;
    setTimeout(function() {
      self.watch_clipboard();
    }, this.interval);
  },

  short_amazon_link: function(text) {
    if (!text.match(this.amazon_url_regexp)) return;
    var matches = [RegExp.$1];
    var elements = RegExp.$2.split("/");
    for (var i = 0; i < elements.length; i++) {
      if (elements[i].match(/^\w+$/)) {
        matches.push(elements[i]);
      }
    }
    // without search query
    if (matches[1] != "s") {
      clipboard.text = matches.join("/");
    }
  },

  active_owner: function() {
    var self = this;
    this.interval = this.active_mode_interval;
    this.register_watch_handler();
    if (this.shift_to_inactive_mode_timer_id) {
      clearTimeout(this.shift_to_inactive_mode_timer_id);
    }
    this.shift_to_inactive_mode_timer_id = setTimeout(function() {
      self.interval = self.inactive_mode_interval;
    }, this.shift_to_inactive_mode_timeout);
  }
};

var amazon_linker;

function event::onLoad() {
  amazon_linker = new AmazonLinker();
}

function event::onChannelText(prefix, channel, text) {
  if (prefix.nick == myNick) {
    amazon_linker.active_owner();
  }
}