Lightning talk at #yr2012

1. Guitar Hero,
Wikipedia,VK, Perl, Like it!
Anatoly Sharifulin
YAPC::Russia 2012

2. Another story
about me and Perl

3. Guitar Hero: guitar,
drums and microphone
Finally got myself a present

5. I’m Playing...

7. Plus a singer :-)

8. Guitar Hero for «kids»
Hand made :-)

10. — Who plays or likes
Guitar Hero?

11. — Why don't you
come by? :-)

12. That's amazing, yeah,
but...

13. 1. Few familiar tracks

14. 2. Too many discs,
what to buy,
what songs are there?

15. Eureka!
I know what to do...

16. and I know Perl!

17. 1. Wikipedia
On wiki I found all disc and track details

18. 1. Wikipedia
Wrote a Perl script to parse all tracklists
and save to a database

19. 1. Wikipedia
map + grep + re + insert db

20. 2.VK.com
There are all (or almost all) tracks
and API on VKontakte!

21. 2.VK.com
Created a VK app,
accessed audio files through the OAuth Authorization

22. 2.VK.com
Wrote an ojo script to find links
to all mp3 through API

23. 2.VK.com
API Limits: no parallel requests
and 100 requests per hour from one user

24. 2.VK.com
Track search: corrected some tracks manually,
umlauts and NFD (thanks to @nordicdyno)

25. my $t = NFD( $_->{title} );
$t =~ s/pM//og;
my $q = b( $t )->url_escape->to_string;
my $r = g(
"https://api.vkontakte.ru/method/audio.search?q=
$q&lyrics=1&count=1&access_token=$conf->{token}"
)->json;

26. 2.VK.com
With the same ojo wrote a downloader of mp3-files
(in one stream, so not to cross the limits)

27. 2.VK.com
The only screw-up of ojo:
all files are of the same length; solution:
$ENV{MOJO_MAX_MESSAGE_SIZE} = 100*1024*1024

28. 2.VK.com
Downloaded over 650 tracks,
no fun in listening to a local player...

29. 3. Frodio.com
Created a radiostation with a random playlist;
a tiny bug: not all tracks contain correct ID3-tags

30. 3. Frodio.com
Wrote a script to edit tags
using MP3::Tag (delete ID3v1, set ID3v2)

31. 3. Frodio.com
Artist — Track title [GH disc name]

32. 3. Frodio.com
Took two days to get a good radio
— Radio Guitar Hero
http://guitarhero.frodio.com

34. Now I'm kept abreast
of all GH tracks

35. Facebook Effect
But I felt lonely and posted to GH Facebook group
about radio

36. Facebook Effect
2250+ Likes, 43 Shared, 76 Comments,
78 peak of online listeners

38. Perl, Guitar Hero and
Rock’n’Roll

39. use Perl or die;

40. Thanks!
Anatoly Sharifulin
YAPC::Russia 2012