DynamoDBIngester.php

<?php
/**
 * DynamoDB Dump File Ingestion Script 
 * - takes a dynamodb dumpfile and breaks it down into individual records
 * - splits each record back into its component parts in an array
 * - returns it all
 * 
 * Author   : Paul Blakey.
 * Date     : 2/14/14
 *
 * License : 
 * The MIT License (MIT)
 * 
 * Copyright (c) 2014 Paul Blakey
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 */
Class DynamoDBIngester 
{
    private $_record_store = array();

    public function parseRecord($record_string)
    {
        // keys are surrounded by chr(2) & chr(3)
        // split the record into an array with chr(2)
        $raw_variables = explode(chr(2),$record_string);
        $output_array = array();
        foreach($raw_variables as $var)
        {
            list($var_name,$var_data) = explode(chr(3),$var);
            $stripped_data = json_decode($var_data,true);
            $output_array[$var_name] = array_pop(array_values($stripped_data));
        }
        return $output_array;
    }

    /**
     * ingests a file and feeds it to parseRecord.
     * @param  string $filepath the path to the file.
     * @return array           converted records as array
     */
    public function ingestFile($filepath)
    {
        // open the file
        // read each line
        // store the parsed record in $_recordStore
        // return $_recordStore
        $this->_record_store = array();
        $file = fopen($filepath, 'r');
        while($line = fgets($file))
        {
            $this->_record_store[] = $this->parseRecord($line);
        }

        return $this->_record_store;
    }
}

// for command line usage
// - php DynamoDBIngester.php filename=/path/to/file

if($argv && count($argv) > 1) { 
    $args = array('filename' => '');
    foreach ($argv as $k=>$v) 
    { 
      // skip the script name
      if ($k == 0) continue;
      list($key,$val) = explode('=',$v);
      $args[$key] = $val;
    } 
    $new_ingester = new DynamoDBIngester();
    print_r($new_ingester->ingestFile($args['filename']));
}