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49
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1 use strict;
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2 package DateTime::Span;
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3 package DateTime;
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4 use Common;
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5 use Time::Local;
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6 use Time::Zone;
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7 use Date::Format;
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8 our @ISA = qw(Object);
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9
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10 use overload
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11 '+' => \&opAdd,
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12 '-' => \&opSubtract,
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13 '<=>' => \&opCompare,
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14 'bool' => \&opAsBool,
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15 'fallback' => 1,
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16 '""' => \&opAsString;
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17
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18 BEGIN {
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19 DeclareProperty UnixTime => ACCESS_READ;
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20 }
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21
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22 sub CTOR {
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23 my $this = shift;
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24
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25 if (@_ >= 2) {
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26 my(%args) = @_;
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27
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28 $this->{$UnixTime} = $args{UnixTime} or die new Exception("A correct unix time value is required");
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29 } else {
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30 $this->{$UnixTime} = $this->ParseISOTime(shift,'+000');
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31 }
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32 }
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33
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34 sub ParseISOTime {
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35 my ($class,$time,$timezone) = @_;
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36
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37 if ($time =~ /^(\d{4})-(\d{2})-(\d{2})(?:.(\d{2}):(\d{2}):(\d{2})(?:\.\d{3})?)?/ ) {
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38 my ($yyyy,$mm,$dd,$hh,$MM,$SS) = ($1-1900,$2-1,$3,$4 || 0,$5 || 0,$6 || 0);
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39 if ($timezone) {
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40 return tz_offset($timezone) + timegm($SS,$MM,$hh,$dd,$mm,$yyyy);
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41 } else {
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42 return timelocal($SS,$MM,$hh,$dd,$mm,$yyyy);
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43 }
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44 } else {
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45 die new Exception("The specified string isn\'t a correct ISO date",$time);
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46 }
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47 }
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48
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49 sub new_ISO {
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50 my ($class,$ISOTime,$zone) = @_;
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51 return $class->new(UnixTime => $class->ParseISOTime($ISOTime,$zone));
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52 }
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53
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54 sub now {
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55 my ($class) = @_;
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56 return $class->new(UnixTime => time);
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57 }
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58
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59 sub AsISOString {
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60 my ($this,$zone) = @_;
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61 return time2str("%Y-%m-%dT%H:%M:%S",$this->{$UnixTime},$zone);
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62 }
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63
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64 sub AsFormatString {
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65 my ($this,$format,$zone) = @_;
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66 return time2str($format,$this->{$UnixTime},$zone);
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67 }
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68
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69 sub opAdd {
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70 my ($a,$b,$flag) = @_;
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71
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72 if (UNIVERSAL::isa($b,'DateTime::Span')) {
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73 return new DateTime(UnixTime => $a->{$UnixTime} + $b->SecondsSpan);
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74 } elsif (not ref $b){
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75 return new DateTime(UnixTime => $a->UnixTime + $b);
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76 } else {
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77 die new Exception("Only a time span can be added to the DateTime object",$b);
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78 }
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79 }
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80
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81 sub GetDate {
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82 my ($this) = @_;
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83
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84 return DateTime->new_ISO($this->AsFormatString('%Y-%m-%d'));
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85 }
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86
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87 sub opSubtract {
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88 my ($a,$b,$flag) = @_;
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89
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90 if (UNIVERSAL::isa($b,'DateTime')) {
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91 return new DateTime::Span(Seconds => $a->{$UnixTime}-$b->{$UnixTime});
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92 } elsif (UNIVERSAL::isa($b,'DateTime::Span')) {
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93 return new DateTime(UnixTime => $flag ? $b->SecondsSpan - $a->UnixTime: $a->UnixTime - $b->SecondsSpan);
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94 } elsif (not ref $b){
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95 return new DateTime(UnixTime => $flag ? $b - $a->UnixTime : $a->UnixTime - $b);
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96 } else {
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97 die new Exception("Only an another DateTime object or a time span can be subtracted from the DateTime",$b);
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98 }
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99 }
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100
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101 sub opCompare {
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102 my ($a,$b,$flag) = @_;
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103
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104 if (UNIVERSAL::isa($b,'DateTime')) {
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105 return $flag ? $b->{$UnixTime} <=> $a->{$UnixTime} : $a->{$UnixTime} <=> $b->{$UnixTime};
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106 } else {
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107 die new Exception("Only a DateTime object can be compared to the DateTime object", $b);
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108 }
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109 }
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110
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111 sub opAsString {
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112 my $this = shift;
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113 $this->AsISOString('+000');
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114 }
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115
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116 sub opAsBool {
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117 1;
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118 }
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119
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120 package DateTime::Span;
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121 use Common;
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122 our @ISA = qw(Object);
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123
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124 use overload
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125 '-' => \&opSub,
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126 '+' => \&opAdd,
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127 '<=>' => \&opCmp,
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128 'fallback' => 1;
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129
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130 BEGIN {
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131 DeclareProperty SecondsSpan=>ACCESS_READ;
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132 }
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133
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134 sub CTOR {
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135 my ($this,%args) = @_;
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136
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137 $this->{$SecondsSpan} = ($args{'Seconds'} || 0) + ($args{'Minutes'} || 0)*60 + ($args{'Hours'} || 0)*3600 + ($args{'Days'} || 0)*86400;
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138 }
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139
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140 sub Days {
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141 my ($this) = @_;
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142
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143 return int($this->{$SecondsSpan}/86400);
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144 }
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145
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146 sub Hours {
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147 my ($this) = @_;
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148
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149 return int($this->{$SecondsSpan}/3600);
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150 }
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151 sub Minutes {
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152 my ($this) = @_;
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153
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154 return int($this->{$SecondsSpan}/60);
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155 }
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156
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157 sub opAdd {
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158 my ($a,$b,$flag) = @_;
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159
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160 if (UNIVERSAL::isa($b,'DateTime::Span')) {
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161 return new DateTime::Span(Seconds => $a->{$SecondsSpan} + $b->{$SecondsSpan});
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162 } elsif (not ref $b) {
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163 return new DateTime::Span(Seconds => $a->{$SecondsSpan} + $b);
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164 } else {
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165 die new Exception("Only a time span can be added to the time span");
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166 }
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167 }
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168
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169 sub opSub {
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170 my ($a,$b,$flag) = @_;
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171
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172 if (UNIVERSAL::isa($b,'DateTime::Span')) {
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173 return new DateTime::Span(Seconds => $flag ? $b->{$SecondsSpan} - $a->{$SecondsSpan} : $a->{$SecondsSpan} - $b->{$SecondsSpan});
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174 } elsif (not ref $b) {
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175 return new DateTime::Span(Seconds => $flag ? $b - $a->{$SecondsSpan} : $a->{$SecondsSpan} - $b);
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176 } else {
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177 die new Exception("Only a time span can be subtracted from the time span");
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178 }
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179 }
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180
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181 sub opCmp {
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182 my ($a,$b,$flag) = @_;
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183
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184 if (UNIVERSAL::isa($b,'DateTime::Span')) {
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185 return $flag ? $b->{$SecondsSpan} <=> $a->{$SecondsSpan} : $a->{$SecondsSpan} <=> $b->{$SecondsSpan};
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186 } elsif (not ref $b) {
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187 return $flag ? $b <=> $a->{$SecondsSpan} : $a->{$SecondsSpan} <=> $b;
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188 } else {
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189 die new Exception("Only a time span can be compared to the time span");
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190 }
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191 }
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192
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193 package DateTime::TimeLine;
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194 use Common;
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195 our @ISA = qw(Object);
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196
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197 BEGIN {
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198 DeclareProperty Timeline => ACCESS_READ;
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199 }
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200
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201 sub CTOR {
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202 my ($this) = @_;
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203
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204 $this->{$Timeline} = [ {Date => undef} ];
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205 }
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206
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207 # ðåêóðñèâíî êîïèðóåò ïðîñòûå ñòðóêòóðû
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208 sub SimpleCopy {
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209 my ($refObject,$cache) = @_;
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210
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211 return undef if not defined $refObject;
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212
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213 $cache ||= {};
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214
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215 if ($cache->{$refObject}) {
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216 return $cache->{$refObject};
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217 }
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218
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219 local $_;
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220
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221 if (ref $refObject eq 'HASH' ) {
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222 return ($cache->{$refObject} = { map { $_, SimpleCopy($refObject->{$_},$cache) } keys %$refObject });
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223 } elsif (ref $refObject eq 'ARRAY' ) {
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224 return ($cache->{$refObject} = [ map { SimpleCopy($_,$cache) } @$refObject]);
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225 } else {
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226 return ($cache->{$refObject} = $refObject);
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227 }
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228 }
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229
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230 sub Split {
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231 my ($this,$date) = @_;
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232
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233 die new Exception('Can\'t split the timeline with an undefined date') unless $date;
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234
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235 for (my $i = 0; $i < @{$this->{$Timeline}}; $i++) {
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236 my $Elem = $this->{$Timeline}[$i];
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237 if ($Elem->{Date} and $Elem->{Date} >= $date ) {
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238 if ($Elem->{Date} == $date) {
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239 return $Elem;
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240 } else {
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241 my $newElem = SimpleCopy($this->{$Timeline}[$i-1]);
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242 $newElem->{Date} = $date;
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243 use Data::Dumper;
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244
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245 splice @{$this->{$Timeline}},$i,0,$newElem;
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246 return $newElem;
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247 }
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248 }
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249 }
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250 my $Elem = { Date => $date };
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251 push @{$this->{$Timeline}},$Elem;
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252 return $Elem;
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253 }
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254
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255 sub Select {
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256 my ($this,$start,$end) = @_;
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257
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258 my @result;
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259
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260 for (my $i=0; $i< @{$this->{$Timeline}}; $i++) {
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261 my $Elem = $this->{$Timeline}[$i];
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262 my $Next = $this->{$Timeline}[$i+1];
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263 if (
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264 (not $Elem->{Date} or not $start or $Elem->{Date} < $start)
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265 and
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266 (not $Next->{Date} or not $start or $Next->{Date} > $start)
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267 ) {
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268 # ------*++++(++++*----...--)---
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269 push @result,$Elem;
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270 } elsif (
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271 $Elem->{Date}
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272 and
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273 (not $start or $Elem->{Date} >= $start)
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274 and
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275 (not $end or $Elem->{Date} < $end )
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276 ) {
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277 # ------*---(----*++...++*++)+++*----
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278 push @result,$Elem;
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279 } elsif ( $Elem->{Date} and $end and $Elem->{Date} >= $end) {
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280 last;
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281 }
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282 }
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283
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284 return @result;
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285 }
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286
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287 sub SelectStrict {
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288 my ($this,$start,$end) = @_;
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289 $this->Split($start);
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290 $this->Split($end);
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291 return grep {
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292 $_->{Date}
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293 and
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294 $start ? $_->{Date} >= $start : 1
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295 and
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296 $end ? $_->{Date} < $end : 1
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297 } @{$this->{$Timeline}};
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298 }
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299
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300 sub SelectAsPeriod {
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301 my ($this,$start,$end) = @_;
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302
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303 my @Dates = $this->Select($start,$end);
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304 for (my $i = 0; $i< @Dates; $i++) {
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305 $Dates[$i]->{Start} = $Dates[$i]->{Date};
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306 $Dates[$i]->{End} = $Dates[$i+1] ? $Dates[$i+1]->{Date} : undef
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307 }
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308
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309 return @Dates;
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310 }
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311
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312 1;
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