kindle "My Clippings.txt" splitter

kindle-spit-by-book.php

#!/usr/bin/php
<?php

if (empty($argv[2])) {
  throw new Exception('usage: <this file> "/path/to/My Clippings.txt" /path/to/ouputfiles');
}

$myClippingsFile = $argv[1];
$splitDir = $argv[2];

$bookAndNotes = array();

// read lines
$notes = explode("==========", file_get_contents($myClippingsFile));
if (empty($notes)) {
   throw new Exception("empty or wrong file specified");
}

foreach ($notes as $note) {
  // split title and text
  $lines = array_slice(explode("\n", $note), 1);
  $title = array_shift($lines);
  $title = preg_replace('/([^a-z0-9- ])/i', '', $title);
  $text = implode("\n", $lines);

  // append to file name if the same note does not exist already
  $fileName = __DIR__ . "/notes/notes_$title";
  if ($text && strpos(@file_get_contents($fileName), $text) === false) {
     file_put_contents($fileName, $text, FILE_APPEND);
  }
}