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package Date::Utils::Bahai; |
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$Date::Utils::Bahai::VERSION = '0.03'; |
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=head1 NAME |
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Date::Utils::Bahai - Bahai date specific routines as Moo Role. |
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=head1 VERSION |
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Version 0.03 |
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=cut |
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23832
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use 5.006; |
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use Data::Dumper; |
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use POSIX qw/floor/; |
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use Astro::Utils; |
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use Moo::Role; |
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use namespace::clean; |
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our $BAHAI_MONTHS = [ |
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'', |
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'Baha', 'Jalal', 'Jamal', 'Azamat', 'Nur', 'Rahmat', |
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'Kalimat', 'Kamal', 'Asma', 'Izzat', 'Mashiyyat', 'Ilm', |
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'Qudrat', 'Qawl', 'Masail', 'Sharaf', 'Sultan', 'Mulk', |
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'Ala' |
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]; |
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our $BAHAI_CYCLES = [ |
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'', |
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'Alif', 'Ba', 'Ab', 'Dal', 'Bab', 'Vav', |
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'Abad', 'Jad', 'Baha', 'Hubb', 'Bahhaj', 'Javab', |
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'Ahad', 'Vahhab', 'Vidad', 'Badi', 'Bahi', 'Abha', |
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'Vahid' |
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]; |
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our $BAHAI_DAYS = [ |
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' Jamal ', |
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' Kamal ', |
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' Fidal ', |
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' Idal ', |
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' Istijlal ', |
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' Istiqlal ', |
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' Jalal ' |
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]; |
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49
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has bahai_epoch => (is => 'ro', default => sub { 2394646.5 }); |
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has bahai_days => (is => 'ro', default => sub { $BAHAI_DAYS }); |
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has bahai_months => (is => 'ro', default => sub { $BAHAI_MONTHS }); |
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has bahai_cycles => (is => 'ro', default => sub { $BAHAI_CYCLES }); |
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54
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with 'Date::Utils'; |
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56
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=head1 DESCRIPTION |
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58
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Bahai date specific routines as Moo Role. |
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=head1 METHODS |
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62
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=head2 bahai_to_gregorian($major, $cycle, $year, $month, $day) |
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64
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Returns Gregorian date as list (year, month, day) equivalent of the given bahai |
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date. |
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=cut |
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69
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sub bahai_to_gregorian { |
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my ($self, $major, $cycle, $year, $month, $day) = @_; |
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72
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1
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return $self->julian_to_gregorian($self->bahai_to_julian($major, $cycle, $year, $month, $day)); |
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} |
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75
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=head2 gregorian_to_bahai($year, $month, $day) |
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77
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Returns Bahai date component as list (majaor, cycle, year, month, day) equivalent |
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of the given gregorian date. |
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=cut |
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82
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sub gregorian_to_bahai { |
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my ($self, $year, $month, $day) = @_; |
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85
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return $self->julian_to_bahai($self->gregorian_to_julian($year, $month, $day)); |
86
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} |
87
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88
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=head2 bahai_to_julian($major, $cycle, $year, $month, $day) |
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90
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Returns julian date of the given bahai date. |
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92
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=cut |
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94
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sub bahai_to_julian { |
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733
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my ($self, $major, $cycle, $year, $month, $day) = @_; |
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97
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my ($g_year) = $self->julian_to_gregorian($self->bahai_epoch); |
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297
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my $gy = (361 * ($major - 1)) + |
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(19 * ($cycle - 1)) + |
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($year - 1) + $g_year; |
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102
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8
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my ($gm, $gd) = _vernal_equinox_month_day($gy); |
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104
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8
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return $self->gregorian_to_julian($gy, $gm, $gd) |
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100
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105
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+ |
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(19 * ($month - 1)) |
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+ |
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(($month != 20) ? 0 : ($self->is_gregorian_leap_year($gy + 1) ? -14 : -15)) |
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+ |
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$day; |
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} |
112
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113
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=head2 julian_to_bahai($julian_date) |
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115
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Returns Bahai date component as list (majaor, cycle, year, month, day) equivalent |
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of the given Julian date C<$julian_date>. |
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118
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=cut |
119
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120
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sub julian_to_bahai { |
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2
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my ($self, $julian_date) = @_; |
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123
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2
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7
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$julian_date = floor($julian_date) + 0.5; |
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2
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26
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my $gregorian_year = ($self->julian_to_gregorian($julian_date))[0]; |
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2
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695
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my $start_year = ($self->julian_to_gregorian($self->bahai_epoch))[0]; |
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127
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2
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62
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my $j1 = $self->gregorian_to_julian($gregorian_year, 1, 1); |
128
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2
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12
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my ($gm, $gd) = _vernal_equinox_month_day($gregorian_year); |
129
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2
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7
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my $j2 = $self->gregorian_to_julian($gregorian_year, $gm, $gd); |
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131
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2
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50
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33
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41
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my $bahai_year = $gregorian_year - ($start_year + ((($j1 <= $julian_date) && ($julian_date <= $j2)) ? 1 : 0)); |
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2
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8
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my ($major, $cycle, $year) = $self->get_major_cycle_year($bahai_year); |
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134
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2
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6
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my $days = $julian_date - $self->bahai_to_julian($major, $cycle, $year, 1, 1); |
135
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2
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34
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my $bld = $self->bahai_to_julian($major, $cycle, $year, 20, 1); |
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my $month = ($julian_date >= $bld) ? 20 : (floor($days / 19) + 1); |
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2
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6
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my $day = ($julian_date + 1) - $self->bahai_to_julian($major, $cycle, $year, $month, 1); |
138
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139
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return ($major, $cycle, $year, $month, $day); |
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} |
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142
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=head2 get_major_cycle_year($bahai_year) |
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144
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Returns the attribute as list major, cycle & year as in Kull-i-Shay) of the given |
145
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Bahai year C<$bahai_year>. |
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147
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=cut |
148
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149
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sub get_major_cycle_year { |
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my ($self, $bahai_year) = @_; |
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152
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3
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11
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my $major = floor($bahai_year / 361) + 1; |
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3
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8
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my $cycle = floor(($bahai_year % 361) / 19) + 1; |
154
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5
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my $year = ($bahai_year % 19) + 1; |
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156
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return ($major, $cycle, $year); |
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} |
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159
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=head2 validate_month($month) |
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161
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Dies if the given C<$month> is not a valid Bahai month. |
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163
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=cut |
164
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165
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sub validate_month { |
166
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1
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1
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1
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487
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my ($self, $month) = @_; |
167
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168
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1
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50
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33
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28
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die("ERROR: Invalid month [$month].\n") |
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33
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169
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unless (defined($month) && ($month =~ /^\d{1,2}$/) && ($month >= 1) && ($month <= 19)); |
170
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} |
171
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172
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=head2 validate_day($day) |
173
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174
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Dies if the given C<$day> is not a valid Bahai day. |
175
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176
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=cut |
177
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178
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sub validate_day { |
179
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1
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1
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263
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my ($self, $day) = @_; |
180
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181
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1
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50
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33
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20
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die ("ERROR: Invalid day [$day].\n") |
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182
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unless (defined($day) && ($day =~ /^\d{1,2}$/) && ($day >= 1) && ($day <= 19)); |
183
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} |
184
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185
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# |
186
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# |
187
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# PRIVATE METHODS |
188
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189
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sub _vernal_equinox_month_day { |
190
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10
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10
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9
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my ($year) = @_; |
191
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192
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# Source: Wikipedia |
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# In 2014, the Universal House of Justice selected Tehran, the birthplace of |
194
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# Baha'u'lláh, as the location to which the date of the vernal equinox is to |
195
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# be fixed, thereby "unlocking" the Badi calendar from the Gregorian calendar. |
196
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# For determining the dates, astronomical tables from reliable sources are |
197
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# used. |
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# In the same message the Universal House of Justice decided that the |
199
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# birthdays of the Bab and Baha'u'lláh will be celebrated on "the first and |
200
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# the second day following the occurrence of the eighth new moon after |
201
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# Naw-Ruz" (also with the use of astronomical tables) and fixed the dates of |
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# the Bahaí Holy Days in the Baha'í calendar, standardizing dates for Baha'ís |
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# worldwide. These changes came into effect as of sunset on 20 March 2015.The |
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# changes take effect from the next Bahai New Year, from sunset on March 20, |
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# 2015. |
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my $month = 3; |
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my $day = 20; |
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if ($year >= 2015) { |
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my $equinox_date = calculate_equinox('mar', 'utc', $year); |
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if ($equinox_date =~ /\d{4}\-(\d{2})\-(\d{2})\s/) { |
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$month = $1; |
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$day = $2; |
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} |
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} |
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return ($month, $day); |
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} |
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=head1 AUTHOR |
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Mohammad S Anwar, C<< >> |
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=head1 REPOSITORY |
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L |
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=head1 ACKNOWLEDGEMENTS |
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Entire logic is based on the L written by John Walker. |
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=head1 BUGS |
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Please report any bugs / feature requests to C |
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, or through the web interface at L. |
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I will be notified, and then you'll automatically be notified of progress on your |
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bug as I make changes. |
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=head1 SUPPORT |
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You can find documentation for this module with the perldoc command. |
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perldoc Date::Utils::Bahai |
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You can also look for information at: |
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=over 4 |
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=item * RT: CPAN's request tracker |
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L |
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=item * AnnoCPAN: Annotated CPAN documentation |
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L |
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=item * CPAN Ratings |
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L |
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=item * Search CPAN |
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L |
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=back |
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=head1 LICENSE AND COPYRIGHT |
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Copyright (C) 2015 Mohammad S Anwar. |
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This program is free software; you can redistribute it and / or modify it under |
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the terms of the the Artistic License (2.0). You may obtain a copy of the full |
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license at: |
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L |
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Any use, modification, and distribution of the Standard or Modified Versions is |
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governed by this Artistic License.By using, modifying or distributing the Package, |
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you accept this license. Do not use, modify, or distribute the Package, if you do |
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not accept this license. |
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If your Modified Version has been derived from a Modified Version made by someone |
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other than you,you are nevertheless required to ensure that your Modified Version |
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complies with the requirements of this license. |
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This license does not grant you the right to use any trademark, service mark, |
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tradename, or logo of the Copyright Holder. |
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290
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This license includes the non-exclusive, worldwide, free-of-charge patent license |
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to make, have made, use, offer to sell, sell, import and otherwise transfer the |
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Package with respect to any patent claims licensable by the Copyright Holder that |
293
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are necessarily infringed by the Package. If you institute patent litigation |
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(including a cross-claim or counterclaim) against any party alleging that the |
295
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Package constitutes direct or contributory patent infringement,then this Artistic |
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License to you shall terminate on the date that such litigation is filed. |
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298
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Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND |
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CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR |
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NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS |
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REQUIRED BY LAW, NO COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, |
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INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE |
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OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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306
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=cut |
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308
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1; # End of Date::Utils::Bahai |