diff options
Diffstat (limited to 'FireBase/FirebaseKeyGenerator.cs')
-rw-r--r-- | FireBase/FirebaseKeyGenerator.cs | 49 |
1 files changed, 18 insertions, 31 deletions
diff --git a/FireBase/FirebaseKeyGenerator.cs b/FireBase/FirebaseKeyGenerator.cs index acad399..37beed5 100644 --- a/FireBase/FirebaseKeyGenerator.cs +++ b/FireBase/FirebaseKeyGenerator.cs @@ -1,13 +1,13 @@ +using System; +using System.Text; + namespace Firebase.Database { - using System; - using System.Text; - /// <summary> - /// Offline key generator which mimics the official Firebase generators. - /// Credit: https://github.com/bubbafat/FirebaseSharp/blob/master/src/FirebaseSharp.Portable/FireBasePushIdGenerator.cs + /// Offline key generator which mimics the official Firebase generators. + /// Credit: https://github.com/bubbafat/FirebaseSharp/blob/master/src/FirebaseSharp.Portable/FireBasePushIdGenerator.cs /// </summary> - public class FirebaseKeyGenerator + public class FirebaseKeyGenerator { // Modeled after base64 web-safe chars, but ordered by ASCII. private const string PushCharsString = "-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"; @@ -26,10 +26,11 @@ namespace Firebase.Database } /// <summary> - /// Returns next firebase key based on current time. + /// Returns next firebase key based on current time. /// </summary> /// <returns> - /// The <see cref="string"/>. </returns> + /// The <see cref="string" />. + /// </returns> public static string Next() { // We generate 72-bits of randomness which get turned into 12 characters and @@ -37,31 +38,25 @@ namespace Firebase.Database // characters we generated because in the event of a collision, we'll use those same // characters except "incremented" by one. var id = new StringBuilder(20); - var now = (long)(DateTimeOffset.Now - Epoch).TotalMilliseconds; + var now = (long) (DateTimeOffset.Now - Epoch).TotalMilliseconds; var duplicateTime = now == lastPushTime; lastPushTime = now; var timeStampChars = new char[8]; - for (int i = 7; i >= 0; i--) + for (var i = 7; i >= 0; i--) { - var index = (int)(now % PushChars.Length); + var index = (int) (now % PushChars.Length); timeStampChars[i] = PushChars[index]; - now = (long)Math.Floor((double)now / PushChars.Length); + now = (long) Math.Floor((double) now / PushChars.Length); } - if (now != 0) - { - throw new Exception("We should have converted the entire timestamp."); - } + if (now != 0) throw new Exception("We should have converted the entire timestamp."); id.Append(timeStampChars); if (!duplicateTime) { - for (int i = 0; i < 12; i++) - { - lastRandChars[i] = (byte)random.Next(0, PushChars.Length); - } + for (var i = 0; i < 12; i++) lastRandChars[i] = (byte) random.Next(0, PushChars.Length); } else { @@ -69,24 +64,16 @@ namespace Firebase.Database // except incremented by 1. var lastIndex = 11; for (; lastIndex >= 0 && lastRandChars[lastIndex] == PushChars.Length - 1; lastIndex--) - { lastRandChars[lastIndex] = 0; - } lastRandChars[lastIndex]++; } - for (int i = 0; i < 12; i++) - { - id.Append(PushChars[lastRandChars[i]]); - } + for (var i = 0; i < 12; i++) id.Append(PushChars[lastRandChars[i]]); - if (id.Length != 20) - { - throw new Exception("Length should be 20."); - } + if (id.Length != 20) throw new Exception("Length should be 20."); return id.ToString(); } } -} +}
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