Alo/opensprinkler-weather
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Wrap code within a closure function

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This commit is contained in:
Samer Albahra
2015-07-01 18:45:27 -05:00
parent 8c7d5b5bc7
commit 664cc3666a
1 changed files with 263 additions and 256 deletions
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87
routes/weather.js
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@@ -1,5 +1,7 @@
// Define regex filters to match against location
var http = require( "http" ),
( function() {
// Define regex filters to match against location
var http = require( "http" ),
filters = {
gps: /^[-+]?([1-8]?\d(\.\d+)?|90(\.0+)?),\s*[-+]?(180(\.0+)?|((1[0-7]\d)|([1-9]?\d))(\.\d+)?)$/,
pws: /^(?:pws|icao):/,
@@ -7,9 +9,9 @@ var http = require( "http" ),
time: /(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})([+-])(\d{2})(\d{2})/
};
// Generic HTTP request handler that parses the URL and uses the
// native Node.js http module to perform the request
function httpRequest( url, callback ) {
// Generic HTTP request handler that parses the URL and uses the
// native Node.js http module to perform the request
function httpRequest( url, callback ) {
url = url.match( filters.url );
var options = {
@@ -35,16 +37,16 @@ function httpRequest( url, callback ) {
// If the HTTP request fails, return false
callback( false );
} );
}
}
// Converts IP string to integer
function ipToInt( ip ) {
// Converts IP string to integer
function ipToInt( ip ) {
ip = ip.split( "." );
return ( ( ( ( ( ( +ip[0] ) * 256 ) + ( +ip[1] ) ) * 256 ) + ( +ip[2] ) ) * 256 ) + ( +ip[3] );
}
}
// Takes a PWS or ICAO location and resolves the GPS coordinates
function getPWSCoordinates( location, weatherUndergroundKey, callback ) {
// Takes a PWS or ICAO location and resolves the GPS coordinates
function getPWSCoordinates( location, weatherUndergroundKey, callback ) {
var url = "http://api.wunderground.com/api/" + weatherUndergroundKey +
"/conditions/forecast/q/" + encodeURIComponent( location ) + ".json";
@@ -58,11 +60,11 @@ function getPWSCoordinates( location, weatherUndergroundKey, callback ) {
callback( false );
}
} );
}
}
// If location does not match GPS or PWS/ICAO, then attempt to resolve
// location using Weather Underground autocomplete API
function resolveCoordinates( location, callback ) {
// If location does not match GPS or PWS/ICAO, then attempt to resolve
// location using Weather Underground autocomplete API
function resolveCoordinates( location, callback ) {
var url = "http://autocomplete.wunderground.com/aq?h=0&query=" +
encodeURIComponent( location );
@@ -72,11 +74,11 @@ function resolveCoordinates( location, callback ) {
callback( [ data.RESULTS[0].lat, data.RESULTS[0].lon ] );
}
} );
}
}
// Accepts a time string formatted in ISO-8601 and returns the timezone.
// The timezone output is formatted for OpenSprinkler Unified firmware.
function getTimezone( time ) {
// Accepts a time string formatted in ISO-8601 and returns the timezone.
// The timezone output is formatted for OpenSprinkler Unified firmware.
function getTimezone( time ) {
time = time.match( filters.time );
var hour = parseInt( time[7] + time[8] ),
@@ -86,10 +88,10 @@ function getTimezone( time ) {
hour = hour + ( hour >=0 ? minute : -minute );
return ( ( hour + 12 ) * 4 ) >> 0;
}
}
// Retrieve weather data to complete the weather request
function getWeatherData( location, callback ) {
// Retrieve weather data to complete the weather request
function getWeatherData( location, callback ) {
// Get the API key from the environment variables
var WSI_API_KEY = process.env.WSI_API_KEY,
@@ -102,10 +104,10 @@ function getWeatherData( location, callback ) {
httpRequest( url, function( data ) {
callback( JSON.parse( data ) );
} );
}
}
// Calculates the resulting water scale using the provided weather data, adjustment method and options
function calculateWeatherScale( adjustmentMethod, adjustmentOptions, weather ) {
// Calculates the resulting water scale using the provided weather data, adjustment method and options
function calculateWeatherScale( adjustmentMethod, adjustmentOptions, weather ) {
// Calculate the average temperature
var temp = ( weather.observation.imperial.temp_max_24hour + weather.observation.imperial.temp_min_24hour ) / 2,
@@ -148,10 +150,10 @@ function calculateWeatherScale( adjustmentMethod, adjustmentOptions, weather ) {
}
return -1;
}
}
// Function to return the sunrise and sunset times from the weather reply
function getSunData( weather ) {
// Function to return the sunrise and sunset times from the weather reply
function getSunData( weather ) {
// Sun times must be converted from strings into date objects and processed into minutes from midnight
var sunrise = weather.observation.sunrise.match( filters.time ),
@@ -161,13 +163,13 @@ function getSunData( weather ) {
parseInt( sunrise[4] ) * 60 + parseInt( sunrise[5] ),
parseInt( sunset[4] ) * 60 + parseInt( sunset[5] )
];
}
}
// Checks if the weather data meets any of the restrictions set by OpenSprinkler.
// Restrictions prevent any watering from occurring and are similar to 0% watering level.
// California watering restriction prevents watering if precipitation over two days is greater
// than 0.01" over the past 48 hours.
function checkWeatherRestriction( adjustmentValue, weather ) {
// Checks if the weather data meets any of the restrictions set by OpenSprinkler.
// Restrictions prevent any watering from occurring and are similar to 0% watering level.
// California watering restriction prevents watering if precipitation over two days is greater
// than 0.01" over the past 48 hours.
function checkWeatherRestriction( adjustmentValue, weather ) {
var californiaRestriction = ( adjustmentValue >> 7 ) & 1;
if ( californiaRestriction ) {
@@ -180,12 +182,16 @@ function checkWeatherRestriction( adjustmentValue, weather ) {
}
return false;
}
}
// API Handler when using the weatherX.py where X represents the
// adjustment method which is encoded to also carry the watering
// restriction and therefore must be decoded
exports.getWeather = function( req, res ) {
// API Handler when using the weatherX.py where X represents the
// adjustment method which is encoded to also carry the watering
// restriction and therefore must be decoded
exports.getWeather = function( req, res ) {
// The adjustment method is encoded by the OpenSprinkler firmware and must be
// parsed. This allows the adjustment method and the restriction type to both
// be saved in the same byte.
var adjustmentMethod = req.params[0] & ~( 1 << 7 ),
adjustmentOptions = req.query.wto,
location = req.query.loc,
@@ -267,5 +273,6 @@ exports.getWeather = function( req, res ) {
getWeatherData( location, finishRequest );
} );
}
};
};
} )();