1 | #!/usr/bin/perl -w
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2 | # MythWeather-revamp script to retreive weather information from Environment
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3 | # Canada.
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4 | #
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5 | # Most of this code was taken directly from Lucien Dunning's
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6 | # (ldunning@gmail.com) PERL scripts. Kudos to Lucien for doing all of the
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7 | # hard work that I shamelessly stole.
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8 | #
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9 | # TODO Code clean up and organization
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10 |
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11 | use strict;
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12 | use LWP::Simple;
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13 | use Date::Manip;
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14 | use Getopt::Std;
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15 | use ENVCANLocation;
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16 | use ENVCANParser;
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17 | use Data::Dumper;
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18 |
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19 | our ($opt_v, $opt_t, $opt_T, $opt_l, $opt_u, $opt_d);
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20 |
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21 | my $name = 'ENVCAN';
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22 | my $version = 0.4;
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23 | my $author = 'Joe Ripley';
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24 | my $email = 'vitaminjoe@gmail.com';
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25 | my $updateTimeout = 15*60;
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26 | my $retrieveTimeout = 30;
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27 | my @types = ('cclocation', 'station_id',
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28 | 'observation_time', 'observation_time_rfc822', 'weather',
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29 | 'temp', 'relative_humidity',
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30 | 'wind_dir', 'wind_degrees', 'wind_speed', 'wind_gust',
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31 | 'pressure', 'dewpoint', 'heat_index', 'windchill',
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32 | 'visibility', 'weather_icon', 'appt', 'wind_spdgst',
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33 | '3dlocation', '6dlocation', 'date-0', 'icon-0', 'low-0', 'high-0',
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34 | 'date-1', 'icon-1', 'low-1', 'high-1',
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35 | 'date-2', 'icon-2', 'low-2', 'high-2', 'updatetime',
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36 | 'date-3', 'icon-3', 'low-3', 'high-3',
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37 | 'date-4', 'icon-4', 'low-4', 'high-4',
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38 | 'date-5', 'icon-5', 'low-5', 'high-5' );
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39 |
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40 | my $dir = "./";
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41 |
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42 | getopts('Tvtlu:d:');
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43 |
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44 | if (defined $opt_v) {
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45 | print "$name,$version,$author,$email\n";
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46 | exit 0;
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47 | }
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48 |
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49 | if (defined $opt_T) {
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50 | print "$updateTimeout,$retrieveTimeout\n";
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51 | exit 0;
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52 | }
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53 | if (defined $opt_l) {
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54 | my $search = shift;
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55 | ENVCANLocation::AddStationIdSearch($search);
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56 | ENVCANLocation::AddRegionIdSearch($search);
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57 | ENVCANLocation::AddCitySearch($search);
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58 | ENVCANLocation::AddProvinceSearch($search);
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59 | my $results = doSearch();
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60 | my $result;
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61 | while($result = shift @$results) {
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62 | if ($result->{station_id} ne "NA" ) {
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63 | print "$result->{station_id}::";
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64 | print "$result->{city}, $result->{region_id}\n";
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65 | }
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66 | }
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67 |
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68 | exit 0;
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69 |
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70 | }
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71 |
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72 |
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73 | if (defined $opt_t) {
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74 | foreach (@types) {print; print "\n";}
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75 | exit 0;
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76 | }
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77 |
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78 | if (defined $opt_d) {
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79 | $dir = $opt_d;
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80 | }
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81 |
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82 | # check variables for defined status
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83 | my $loc = shift;
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84 | if (!(defined $opt_u && defined $loc && !$loc eq "")) {
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85 | die "Invalid usage";
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86 | }
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87 |
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88 | my $units = $opt_u;
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89 |
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90 | # check for cached data
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91 | my $creationdate;
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92 | my $nextupdate;
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93 | my %results;
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94 | my $getData = 1;
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95 | if (open(CACHE, "$dir/envcan_$loc")) {
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96 | ($nextupdate, $creationdate) = split / /, <CACHE>;
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97 | if (Date_Cmp($nextupdate, "today") > 0) { # use cache
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98 | no strict "vars";
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99 | %results = eval <CACHE>;
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100 |
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101 | if (%results) { $getData = 0; }
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102 | else { print STDERR "Error parsing cache $@\n"; }
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103 | }
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104 | }
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105 | close(CACHE);
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106 |
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107 | # no cache, grab from the web
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108 | if ($getData) {
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109 | my $base_url = 'http://www.weatheroffice.gc.ca/forecast/city_e.html?';
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110 | my $response = get $base_url . $loc;
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111 | die unless defined $response;
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112 |
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113 | %results = ENVCANParser::doParse($response, @types);
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114 | $results{'station_id'} = $loc;
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115 |
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116 | # output cache
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117 | open (CACHE, ">$dir/envcan_$loc") or
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118 | die ("Cannot open cache ($dir/envcan_$loc) for writing.");
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119 | $Data::Dumper::Purity = 1;
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120 | $Data::Dumper::Indent = 0;
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121 |
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122 | # cache is good for 15 minutes
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123 | my $newmin = 15;
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124 |
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125 | $nextupdate = DateCalc("today", "+ $newmin minutes");
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126 | print CACHE UnixDate($nextupdate, "%O ") . UnixDate("today", "%O\n");
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127 | print CACHE Data::Dumper->Dump([\%results], ['*results']);
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128 | }
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129 |
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130 | # do some quick conversions
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131 | if ($units eq "ENG") {
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132 | $results{'temp'} = int(((9/5) * $results{'temp'}) + 32);
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133 | $results{'dewpoint'} = int(((9/5) * $results{'dewpoint'}) + 32);
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134 | $results{'windchill'} = int(((9/5) * $results{'windchill'}) + 32);
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135 | $results{'appt'} = int(((9/5) * $results{'appt'}) + 32);
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136 | $results{'visibility'} = sprintf("%.1f", ($results{'visibility'} * 0.621371192));
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137 | $results{'pressure'} = sprintf("%.2f", $results{'pressure'} * 0.0295301);
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138 | $results{'wind_speed'} = sprintf("%.2f", $results{'wind_speed'} * 1.609344);
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139 | $results{'wind_spdgst'} = sprintf("%.2f (NA) mph", $results{'wind_spdgst'} * 1.609344);
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140 |
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141 | for (my $i=0;$i<6;$i++) {
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142 | $results{"high-$i"} = int(((9/5) * $results{"high-$i"}) + 32);
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143 | $results{"low-$i"} = int(((9/5) * $results{"low-$i"}) + 32);
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144 | }
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145 | } else {
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146 | $results{'wind_spdgst'} = sprintf("%.2f (NA) kph", $results{'wind_spdgst'});
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147 | }
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148 |
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149 |
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150 | foreach my $key (sort (keys %results)) {
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151 | print "$key". "::";
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152 | if (length($results{$key}) == 0) {
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153 | print "NA\n";
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154 | } else {
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155 | print $results{$key} ."\n";
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156 | }
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157 | }
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158 |
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