Added time, regions, and severity properties and Severity enum to the Alert struct

Author: sxg

Source/Alert.swift

@@ -14,6 +14,9 @@ public struct Alert {
     /// A short text summary of the `Alert`.
     public let title: String
 
+    /// The time at which this alert was issued.
+    public let time: Date
+    
     /// The time at which the `Alert` will cease to be valid.
     public let expires: Date?
 
@@ -23,6 +26,25 @@ public struct Alert {
     /// An HTTP(S) URI that contains detailed information about the `Alert`.
     public let uri: URL
 
+    /// Regions covered by the `Alert`.
+    public let regions: [String]
+    
+    /// The severity of the `Alert`.
+    public let severity: Severity
+    
+    /// Severity categories of `Alert`s.
+    public enum Severity: String {
+        
+        /// `advisory` `Alert`s tell an individual to be aware of potentially severe weather.
+        case advisory = "advisory"
+        
+        /// `watch` `Alert`s tell an individual to prepare for potentially severe weather.
+        case watch = "watch"
+        
+        /// `warning` `Alert`s tell an individual to take immediate action to protect themselves and others from potentially severe weather.
+        case warning = "warning"
+    }
+    
     /// Creates a new `Alert` from a JSON object.
     ///
     /// - parameter json: A JSON object with keys corresponding to the `Alert`'s properties.
@@ -35,7 +57,10 @@ public struct Alert {
         } else {
             expires = nil
         }
+        time = Date(timeIntervalSince1970: json["time"] as! Double)
         uri = URL(string: json["uri"] as! String)!
         description = json["description"] as! String
+        regions = json["regions"] as! [String]
+        severity = Severity(rawValue: json["severity"] as! String)!
     }
 }

Tests/Resources/forecast_no_optionals.json

@@ -1616,13 +1616,17 @@
          "title":"High Wind Warning for Baltimore, MD",
          "time":1453562580,
          "description":"...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS\nEVENING...\n* TIMING...THROUGH TODAY.\n* WINDS...NORTH 25 TO 35 MPH WITH GUSTS UP TO 55 MPH.\n* IMPACTS...DOWNED TREES...POWERLINES...AND MINOR STRUCTURAL\nDAMAGE. DRIVING HIGH PROFILE VEHICLES IN THESE CONDITIONS IS\nDANGEROUS.\n",
-         "uri":"http://alerts.weather.gov/cap/wwacapget.php?x=MD1255E4FAA7AC.HighWindWarning.1255E5079700MD.LWXNPWLWX.b0aa96f59630770f05e80c219b873fd2"
+         "uri":"http://alerts.weather.gov/cap/wwacapget.php?x=MD1255E4FAA7AC.HighWindWarning.1255E5079700MD.LWXNPWLWX.b0aa96f59630770f05e80c219b873fd2",
+         "severity":"watch",
+         "regions": ["Eastern Bergen","Eastern Essex","Eastern Passaic","Eastern Union","Hudson","Western Bergen","Western Essex","Western Passaic","Western Union"]
       },
       {
          "title":"Blizzard Warning for Baltimore, MD",
          "time":1453559700,
          "description":"VERY STRONG LOW PRESSURE WILL DRIFT EAST FROM THE MOUTH OF THE\nCHESAPEAKE BAY TODAY.\n...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY...\n* HAZARD TYPES...HEAVY SNOW AND BLOWING SNOW.\n* SNOW ACCUMULATIONS...22 TO 30 INCHES...UP TO 36 INCHES ABOVE\n1200 FEET.\n* TIMING...HEAVY SNOW THROUGH THIS EVENING. BLOWING SNOW INTO\nSUNDAY.\n* IMPACTS...HEAVY SNOW AND BLOWING SNOW WILL CONTINUE TO CAUSE\nDANGEROUS CONDITIONS AND WILL BE A THREAT TO LIFE AND PROPERTY.\nTRAVEL IS IMPOSSIBLE. VISIBILITY WILL BE REDUCED TO NEAR ZERO\nAT TIMES IN WHITEOUT CONDITIONS THROUGH TONIGHT.\n* WINDS...NORTH 20 TO 30 MPH WITH GUSTS UP TO 50 MPH.\n* TEMPERATURES...IN THE LOWER 20S. WIND CHILLS SINGLE DIGITS.\n",
-         "uri":"http://alerts.weather.gov/cap/wwacapget.php?x=MD1255E4FA854C.BlizzardWarning.1255E50944B0MD.LWXWSWLWX.2725408b6d049dc67224e179c743dc2d"
+         "uri":"http://alerts.weather.gov/cap/wwacapget.php?x=MD1255E4FA854C.BlizzardWarning.1255E50944B0MD.LWXWSWLWX.2725408b6d049dc67224e179c743dc2d",
+         "severity":"watch",
+         "regions": ["Eastern Bergen","Eastern Essex","Eastern Passaic","Eastern Union","Hudson","Western Bergen","Western Essex","Western Passaic","Western Union"]
       }
    ],
    "flags":{