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# rddb.pm
#
# rhrdlibs
#
# Copyright (C) 2015-2016 Christian Pointner <equinox@helsinki.at>
#
# This file is part of rhrdlibs.
#
# rhrdlibs is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# any later version.
#
# rhrdlibs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with rhrdlibs. If not, see <http://www.gnu.org/licenses/>.
#
package RHRD::utils;
use strict;
use POSIX;
use DateTime;
use DateTime::TimeZone;
use LWP::Simple;
use URI::Fetch;
use JSON::MaybeXS;
sub get_rd_week
{
my ($time) = @_;
#
# This computes the current Rivendell Week based on the number
# of weeks since epoch.
#
# Explanation:
# epoch was at 01.01.1970 which was a Thursday.
# Monday in that week is (s-from-epoch + 3*24*60*60) seconds ago.
# This needs to be adjusted by the timezone offset for Europe/Vienna
# which is of course not constant (damn you daylight savings time)
# Divide this by (7*24*60*60) and you get the number of
# weeks since the Monday in the week of epoch adjusted for timezone offsets.
# This week had week number 3 so add an offset of 2 and
# get the modulo of 4. This rounded down gives you the current week
# with 0 meaning Week 1. So add 1 to that number and you will get
# the current RD week.
#
if(!defined($time)) {
$time = DateTime->now();
}
my $tz = DateTime::TimeZone->new(name => 'Europe/Vienna');
my $tz_offset = $tz->offset_for_datetime($time);
my $sEpoch = $time->epoch() + $tz_offset;
my $week = floor(((($sEpoch + 259200)/604800) + 2) % 4) + 1;
return $week;
}
use constant {
DB_PARAM_TYPE_HINT => "only S, M and J are allowed with S -> Show, M -> Musicpool, J -> Jingles",
DB_PARAM_RHYTHM_HINT => "only 0 or 1 are allowed, length must be exactly 4 and it must not be '0000'",
DB_PARAM_DOW_HINT => "must be between 1 and 7 (1=Monday, ..., 7=Sunday)",
DB_PARAM_STARTTIME_HINT => "must be in format HHMM (without seperator) in 24 hour format",
DB_PARAM_LEN_HINT => "must be a positive number below 1440",
CMDLINE_WEEK_HINT => "must be one of W1, W2, W3, W4",
CMDLINE_DOW_HINT => "must be one of MO, TU, WE, TH, FR, SA, SU",
};
sub dropbox_param_type_ok
{
my ($type) = @_;
unless(defined($type) && ($type == 'S' || $type == 'M' || $type == 'J')) {
return (0, "unkown type '" . (defined($type) ? $type : 'undef') . "'", DB_PARAM_TYPE_HINT);
}
return (1, 'OK', DB_PARAM_TYPE_HINT);
}
sub dropbox_param_rhythm_ok
{
my ($rhythm) = @_;
if(!defined($rhythm) || $rhythm !~ m/^[01]{4}$/ || $rhythm eq '0000') {
return (0, "rhythm '" . (defined($rhythm) ? $rhythm : 'undef') . "' contains illegal characters or is too long/short", DB_PARAM_RHYTHM_HINT);
}
return (1, 'OK', DB_PARAM_RHYTHM_HINT);
}
sub dropbox_param_dow_ok
{
my ($dow) = @_;
if(!defined($dow) || $dow < 1 || $dow > 7) {
return (0, "dow '" . (defined($dow) ? $dow : 'undef') . "' is out of bounds", DB_PARAM_DOW_HINT);
}
return (1, 'OK', DB_PARAM_DOW_HINT);
}
sub dropbox_param_starttime_ok
{
my ($starttime) = @_;
if(!defined($starttime) || $starttime !~ m/^[0-2][0-9][0-5][0-9]$/ || $starttime > 2359) {
return (0, "starttime '" . (defined($starttime) ? $starttime : 'undef') . "' is not a valid clock time", DB_PARAM_STARTTIME_HINT);
}
return (1, 'OK', DB_PARAM_STARTTIME_HINT);
}
sub dropbox_param_len_ok
{
my ($len) = @_;
if(!defined($len) || $len <= 0 || $len > 1440) {
return (0, "len '" . (defined($len) ? $len : 'undef') . "' is out of bounds", DB_PARAM_LEN_HINT);
}
return (1, 'OK', DB_PARAM_LEN_HINT);
}
sub cmdline_rdweek
{
my ($dow) = @_;
if(uc($dow) eq "W1") {
return (1, 'OK', CMDLINE_WEEK_HINT);
} elsif(uc($dow) eq "W2") {
return (2, 'OK', CMDLINE_WEEK_HINT);
} elsif(uc($dow) eq "W3") {
return (3, 'OK', CMDLINE_WEEK_HINT);
} elsif(uc($dow) eq "W4") {
return (4, 'OK', CMDLINE_WEEK_HINT);
}
return (undef, 'invalid week', CMDLINE_WEEK_HINT);
}
sub cmdline_dow
{
my ($dow) = @_;
if(uc($dow) eq "MO") {
return (1, 'OK', CMDLINE_DOW_HINT);
} elsif(uc($dow) eq "TU") {
return (2, 'OK', CMDLINE_DOW_HINT);
} elsif(uc($dow) eq "WE") {
return (3, 'OK', CMDLINE_DOW_HINT);
} elsif(uc($dow) eq "TH") {
return (4, 'OK', CMDLINE_DOW_HINT);
} elsif(uc($dow) eq "FR") {
return (5, 'OK', CMDLINE_DOW_HINT);
} elsif(uc($dow) eq "SA") {
return (6, 'OK', CMDLINE_DOW_HINT);
} elsif(uc($dow) eq "SU") {
return (7, 'OK', CMDLINE_DOW_HINT);
}
return (undef, 'invalid day-of-week', CMDLINE_DOW_HINT);
}
sub fetch_parse_json
{
my ($url, $ua_str, $headers) = @_;
my $uri = URI->new($url);
$ua_str = "Radio Helsinki Rivendell Utilities" unless $ua_str;
my $ua = LWP::UserAgent->new;
$ua->agent($ua_str);
$ua->env_proxy;
if (defined $headers) {
while(my ($field, $value) = each %{$headers}) {
$ua->default_header($field, $value);
}
}
my $res = URI::Fetch->fetch($uri, UserAgent => $ua)
or return (0, URI::Fetch->errstr);
if($res->status == URI::Fetch::URI_GONE()) {
return (0, "This resource has been permanently removed");
}
my $json = $res->content;
my $data;
eval {
my $j = JSON::MaybeXS->new(utf8 => 0);
$data = $j->decode($json);
1;
} or do {
return (0, "error parsing import result");
};
return (1, $data);
}
return 1;
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