Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Nighttime #17

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Nighttime #17

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
307 changes: 307 additions & 0 deletions nighttime.php
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,307 @@
<?php
/*
ICS Validator: http://severinghaus.org/projects/icv/
Another Validator: http://icalvalid.cloudapp.net/

//Google Calendar updates every 12 hours (noticed at 9:30am, 9:30pm, 1:00pm, 2:30am).
*/

function is_debug(){
if ( 1==2 ){ //Use this to force debug mode for everyone
return true;
}

if ( array_key_exists('debug', $_GET) ){ //Test it like this: https://gearside.com/calendars/nighttime.php?debug
return true;
}

return false;
}

//Show Errors when debugging
if ( is_debug() ){
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
ini_set('track_errors', 1);
ini_set('html_errors', 1);
error_reporting(E_ALL);
}

//Use and ICS file type when not debugging
if ( !is_debug() ){
header('Content-type: text/calendar; charset=utf-8');
header('Content-Disposition: attachment; filename=gearside_nighttime.ics');
}

//Use this to add a notice at the top of each calendar item's description
$global_notice = "";
//$global_notice = "⚠️ We are working through known issues and improving the accuracy. Apologies for temporary problems.";

//Convert a timestamp integer to a ISO formated UTC timestamp
function iso_date_format($local_timestamp) {
$given = new DateTime(date('Y-m-d H:i:s', $local_timestamp)); //Create the datetime for the local timezone. Use this format: "2014-12-12 14:18:00"
$given->setTimezone(new DateTimeZone("UTC")); //Now update the timezone to UTC
$utc_timestamp = $given->format('Ymd\THis\Z') . "\n"; //Output the UTC timestamp in ISO standard format
return $utc_timestamp;
}

//Escape strings
function escape_string($string) {
return preg_replace('/([\,;])/','\\\$1', $string);
}

$year = ( isset($_GET['year']) )? intval($_GET['year']) : date('Y');
$lat = ( isset($_GET['lat']) )? floatval($_GET['lat']) : 43.0469;
$lng = ( isset($_GET['lng']) )? floatval($_GET['lng']) : -76.1444;

$timezone = 'America/New_York'; //Default to American Eastern timezone
if ( isset($_GET['timezone']) ){ //If a timezone name is provided, use it
$timezone = $_GET['timezone'];
} elseif ( isset($_GET['gmt']) ){ //If a GMT offset is provided, try to find an equivalent timezone
$timezone_list = DateTimeZone::listIdentifiers(); //Get the list of all timezones
foreach ( $all_timezones as $timezone_to_check ){ //Loop through all of the timezones
$tz = new DateTimeZone($timezone_to_check);
$offset = $tz->getOffset(new DateTime()); //Get the offset in seconds from UTC for the timezone
$offset_hours = $offset/3600; //Convert the offset to hours
if ( $offset_hours == intval($_GET['gmt']) ){ //If the offset hours matches the GMT offset, use that timezone
$timezone = $timezone_to_check;
break; //Exit the loop
}
}
}

date_default_timezone_set($timezone); //Now use the timezone that was determined above

function is_syracuse($lat=false, $lng=false){
if ( isset($_GET['syracuse']) ){
return true;
}

if ( $lat == 43.0469 && $lng == -76.1444 ){ //Could make this a little more flexible with >= <=
return true;
}

return false;
}

//Shortest Day Length
$shortest_date = $year . '-12-21';
$shortest_sun_info = date_sun_info(strtotime($shortest_date), $lat, $lng);
$shortest_sunrise = $shortest_sun_info['sunrise'];
$shortest_sunset = $shortest_sun_info['sunset'];
$shortest_length = $shortest_sunset-$shortest_sunrise;

//Longest Day Length
$longest_date = $year . '-06-21';
$longest_sun_info = date_sun_info(strtotime($longest_date), $lat, $lng);
$longest_sunrise = $longest_sun_info['sunrise'];
$longest_sunset = $longest_sun_info['sunset'];
$longest_length = $longest_sunset-$longest_sunrise;

//Current weather forecast
$weather_forecast = array();
$weather_forecast_summary = '';
if ( is_syracuse($lat, $lng) ){
//Weather Forecast
$weather_json = file_get_contents('/home/gearside/public_html/weather.gearside.com/v2/data/weather-owm.json');
if ( !empty($weather_json) ){
$weather_forecast_data = json_decode($weather_json);
if ( is_string($weather_forecast_data) ){
$weather_forecast_data = json_decode($weather_forecast_data); //Decode it again if it is not yet an array. Dunno why I need to do this but it is necessary.
}

foreach ( $weather_forecast_data->daily as $forecast_day ){
$weather_forecast['day' . date('Ymd', $forecast_day->dt)] = array(
'date' => $forecast_day->dt, //UTC time
'high' => round($forecast_day->temp->max) . '°F',
'low' => round($forecast_day->temp->min) . '°F',
'feels_like' => round($forecast_day->feels_like->day) . '°F', //Not using this because there is not a "max", and "day" is not equivalent to be accurate
'humidity' => round($forecast_day->humidity) . '%', //Percent
'wind' => ( $forecast_day->wind_speed > 18 )? round($forecast_day->wind_speed) . 'mph' : '', //Already in MPH from source. Only show if it is high
'pop' => round(($forecast_day->pop)*100), //Percent
//'pop_type' => '', //This is not explicitly provided. Would need to do the math on ->rain vs. ->snow
'snow_accumulation' => ( !empty($forecast_day->snow) && $forecast_day->snow*0.0393701 > 0.2 )? round($forecast_day->snow*0.0393701, 1) . '"' : '', //Convert millimeters to inches. Only show if more than 1/4"
'forecast' => ucwords($forecast_day->weather[0]->main),
'description' => ucwords($forecast_day->weather[0]->description),
'icon' => get_weather_emoji($forecast_day->weather[0]->main, $forecast_day->weather[0]->description, $forecast_day->temp->max) //Combine the main, summary, and high temperature to figure out the icons
);
}
}
}

//Determine emoji icon based on forecast summary
//https://emojipedia.org/search/?q=weather
function get_weather_emoji($main='', $description='', $high=false){
$forecast = strtolower($main) .' ' . strtolower($description);

$emoji_icon = '';
if ( strpos($forecast, 'mostly') !== false || strpos($forecast, 'partly') !== false ){
$emoji_icon = '⛅';
} elseif ( strpos($forecast, 'cloud') !== false || strpos($forecast, 'fog') !== false ){
$emoji_icon = '☁️';
} elseif ( strpos($forecast, 'sunny') !== false ){
$emoji_icon = '☀️';
} elseif ( strpos($forecast, 'snow') !== false ){
$emoji_icon = '❄️';
} elseif ( strpos($forecast, 'rain') !== false || strpos($forecast, 'shower') !== false ){
$emoji_icon = '🌧️';
} elseif ( strpos($forecast, 'storm') !== false ){
$emoji_icon = '⛈️';
} elseif ( strpos($forecast, 'wind') !== false ){
$emoji_icon = '🌬️';
}

if ( !empty($high) ){
if ( $high >= 90 ){
$emoji_icon .= '🥵';
} elseif ( $high >= 75 ){
$emoji_icon .= '🔴';
} elseif ( $high >= 60 ){
$emoji_icon .= '🟠';
} elseif ( $high >= 45 ){
$emoji_icon .= '🟣';
} elseif ( $high >= 32 ){
$emoji_icon .= '🔵';
} elseif ( $high < 32 ){
$emoji_icon .= '🥶';
}
}

return $emoji_icon;
}

?>
BEGIN:VCALENDAR<?php echo "\r\n"; ?>
VERSION:2.0<?php echo "\r\n"; ?>
PRODID:-//hacksw/handcal//NONSGML v1.0//EN<?php echo "\r\n"; //Could this be updated to Gearside? PRODID:-//Gearside Creative//Daylight//EN ?>
CALSCALE:GREGORIAN<?php echo "\r\n"; ?>
METHOD:PUBLISH<?php echo "\r\n"; ?>
X-WR-CALNAME:Gearside - Nighttime<?php echo "\r\n"; ?>
<?php
$date = $year-1 . '-01-01'; //Subtract one year so it can carry over at the end of the year/beginning of the year (this messes up leap years, so refer to conditional at the very bottom).
while ( strtotime($date) <= strtotime($year-1 . '-12-31') || strtotime($date) == strtotime($year . '-02-29') ): //The or statement is just for leap days
$timestamp = strtotime($date);
$next_year_timestamp = strtotime('+1 year', $timestamp);
$sun_info = date_sun_info($next_year_timestamp, $lat, $lng);

$sunrise = $sun_info['sunrise'];
$sunset = $sun_info['sunset'];

$sunrise_civil = $sun_info['civil_twilight_begin'];
$sunrise_nautical = $sun_info['nautical_twilight_begin'];
$sunrise_astronomical = $sun_info['astronomical_twilight_begin'];
$sunset_civil = $sun_info['civil_twilight_end'];
$sunset_nautical = $sun_info['nautical_twilight_end'];
$sunset_astronomical = $sun_info['astronomical_twilight_end'];

$length = $sunrise-$sunset;
$solar_noon = $sunrise+($length/2);

$percent = 100+($length*100)/86400;

list($hours, $minutes) = explode(':', date('G:i', $sunset));
$startTimestamp = mktime($hours, $minutes);

$next_day_sun_info = date_sun_info(strtotime('+1 day', $next_year_timestamp), $lat, $lng);
$next_day_sunrise = $next_day_sun_info['sunrise'];
list($hours, $minutes) = explode(':', date('G:i', $next_day_sunrise));
$endTimestamp = mktime($hours, $minutes);

$seconds = $next_day_sunrise - $sunset;
$minutes = ($seconds / 60) % 60;
$hours = floor($seconds / (60 * 60));

$length_percentile = 0;
if ( $longest_length-$shortest_length > 0 ){ //Prevent division by 0
$length_percentile = round((($length-$shortest_length)*100)/($longest_length-$shortest_length), 1);
}

//Add the weather info to the summary if it matches the date correctly
$weather_forecast_summary = ''; //Empty this variable each time
$weather_icon = ''; //Default emoji icon.
if ( !empty($weather_forecast) ){ //If we have weather data
$this_weather_day = 'day' . date('Ymd', strtotime($date . '+1 year '));
if ( !empty($weather_forecast[$this_weather_day]) ){ //If we have weather data for this specific day
$weather_icon = $weather_forecast[$this_weather_day]['icon'];
$weather_forecast_summary = ' ' . $weather_forecast[$this_weather_day]['forecast'] . ' (High: ' . $weather_forecast[$this_weather_day]['high'] . ', Low ' . $weather_forecast[$this_weather_day]['low'] . ').';

if ( !empty($weather_forecast[$this_weather_day]['pop']) && $weather_forecast[$this_weather_day]['pop'] != 0 ){
$precip_icon = ( $weather_forecast[$this_weather_day]['pop'] >= 90 )? '💦' : '';
$weather_forecast_summary .= ' ' . $precip_icon . ' ' . $weather_forecast[$this_weather_day]['pop'] . '% chance of precipitation.';
}

if ( !empty($weather_forecast[$this_weather_day]['wind']) ){
$weather_forecast_summary .= ' ⚠️ Windy (' . $weather_forecast[$this_weather_day]['wind'] . ').';
}

if ( !empty($weather_forecast[$this_weather_day]['snow_accumulation']) ){
$weather_forecast_summary .= ' ⚠️ ' . $weather_forecast[$this_weather_day]['snow_accumulation'] . ' Snow.';
// Add extra warning for snow if accumulation is significant
}
}
}

//Only show the solar noon time if weather is unavailable (to avoid clutter).
$solar_noon_summary = '';
if ( empty($weather_forecast_summary) ){
$solar_noon_summary = 'Solar noon: ' . date('g:ia', intval($solar_noon)) . '.';
}

if ( is_debug() ){
echo "\r\n------------------\r\n";
echo ( $date == date('Y-m-d', strtotime('Today -1 Year')) ) ? "(Today!) " : "";
echo "Debug Info\r\n";
echo "Last Modified: " . date('l, F j, Y', filemtime(__FILE__)) . "\r\n";
echo "Date (-1 Year): " . $date . "\r\n";
echo "Timezone Used: " . $timezone . "\r\n";
echo "Sunrise: " . $sunrise . "\r\n";
echo "Sunset: " . $sunset . "\r\n";
echo "Nighttime: " . date('l, F j Y, g:ia', $sunrise) . ' to ' . date('l, F j Y, g:ia', $sunset) . "\r\n";
echo "Length: " . $hours . "h " . $minutes . "m (" . round($percent, 1) . "%) of nighttime\r\n";
echo "Solar Noon: " . date('g:ia', intval($solar_noon)) . "\r\n";
if ( is_syracuse($lat, $lng) ) {
echo "Syracuse Detected! This request is eligible for a weather forecast!\r\n";
}
echo "Civil: " . date('g:ia', $sunrise_civil) . ' to ' . date('g:ia', $sunset_civil) . " (There is enough natural sunlight that artificial light may not be required to carry out human activities.)\r\n";
echo "Nautical: " . date('g:ia', $sunrise_nautical) . ' to ' . date('g:ia', $sunset_nautical) . " (The point at which the horizon stops being visible at sea)\r\n";
echo "Astronomical: " . date('g:ia', $sunrise_astronomical) . ' to ' . date('g:ia', $sunset_astronomical) . " (The point when Sun stops being a source of any illumination)\r\n";
echo "\r\nShortest day this year: " . $shortest_length . "\r\n";
echo "Longest day this year: " . $longest_length . "\r\n";
echo "This day length: " . $length . "\r\n";
echo $length_percentile . " Percentile\r\n";
echo ( !empty($weather_forecast_summary) )? $weather_forecast_summary : '(No forecast for this date)';

echo "\r\n";
}
?>
BEGIN:VEVENT<?php echo "\r\n"; ?>
CREATED:<?php echo iso_date_format(strtotime($date)) . "\r\n"; ?>
DTSTART:<?php echo iso_date_format($sunset) . "\r\n"; ?>
DTEND:<?php echo iso_date_format($next_day_sunrise) . "\r\n"; ?>
DTSTAMP:<?php echo iso_date_format(time()) . "\r\n"; ?>
LAST-MODIFIED:<?php echo iso_date_format(filemtime(__FILE__)) . "\r\n"; ?>
UID:<?php echo md5(uniqid(mt_rand(), true)) . "@gearside.com" . "\r\n"; ?>
DESCRIPTION:<?php echo escape_string(
$global_notice . " \\n\\n" .
"Nighttime: " . date('g:ia', $sunset) . ' to ' . date('g:ia', $next_day_sunrise) . " \\n\\n" .
"Length: " . $hours . "h " . $minutes . "m (" . round($percent, 1) . "%) of nighttime\\n\\n" . // (" . $length_percentile . " percentile)
$weather_forecast_summary . "\\n\\n" .
'[Last Updated: ' . date('l, F j, Y, g:ia') . '] \\n\\n' .
"Calendar by Gearside.com") . "\r\n"; //This is for additional information ?>
URL;VALUE=URI:<?php echo escape_string('http://gearside.com/calendars/nighttime.ics') . "\r\n"; ?>
SUMMARY:<?php echo $weather_icon . ' ' . escape_string($hours . 'h ' . $minutes . 'm (' . round($percent, 1) . '%)' . $weather_forecast_summary) . "\r\n"; //Shows up in the title of the event ?>
RRULE:FREQ=YEARLY;COUNT=3<?php echo "\r\n"; ?>
END:VEVENT<?php echo "\r\n"; ?>
<?php
if ( $date == $year-1 . '-02-28' && date('L', strtotime($year . '-02-29')) ){ //If is Feb 28th and if tomorrow is a leap day
$date = date("Y-m-d", strtotime($year . '-02-29')); //Set the year to the current year (rather than the previous year)
} elseif ( $date == $year . '-02-29' ){ //If this *is* leap day
$date = date("Y-m-d", strtotime($year-1 . '-03-01')); //Set the year back to the previous year on March 1
} else {
$date = date("Y-m-d", strtotime("+1 day", strtotime($date))); //Increment the date as normal
}
endwhile; ?>
END:VCALENDAR<?php echo "\r\n"; ?>
<?php die; ?>

X-WR-CALDESC:Visualize nighttime<?php echo "\r\n"; ?>