Migrate from list to sortedset for irc archives.

migrate.js

var r = require('redis');
r.debug_mode = true;

var redis = r.createClient(),
    allRows = [],
    migrated = 0;

redis.on("end", function(){
  console.log("we should be done here");
});

// channels
var fetchAll = function(err, channels) {
  for (i = 0; i < channels.length; ++i) {
    redis.lrange(channels[i], 0, -1, fetch);
  }
  finish();
}

// per channel
var fetch = function(err, rows) {
  if (rows == null) { return; }

  for (i = 0; i < rows.length; ++i) {
    allRows.push(rows[i]);
  }
}

// finish
var finish = function() {
  redis.select(1, migrate);
}

// migrate allRows
var migrate = function() {
  for (i = 0; i < allRows.length; ++i) {
    var row = allRows[i];
    var msg = JSON.parse(row);
    redis.zadd(msg.room, msg.timestamp, row, function(err, reply){migrated++;});
  }  
  redis.quit(report);
}

// report at the end
var report = function() {
  console.log("migrated rows - " + migrated);
}

// get started
redis.keys('#*', fetchAll);