fix event not sent issue on unity mobile devices (#10)

* fix user prefs compatibility issue

* add link.xml

Author: wenxi-zeng

Analytics-CSharp/Analytics-CSharp.csproj

@@ -15,9 +15,15 @@
     <RepositoryUrl>https://github.com/segmentio/Analytics-CSharp</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
   </PropertyGroup>
- 
+
   <ItemGroup>
     <None Include="..\LICENSE" Pack="true" PackagePath="LICENSE" />
+    <None Include="..\README.md" Pack="true" PackagePath="README.md" />
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="Resources\link.xml">
+      <LogicalName>Segment.Analytics.CSharp.xml</LogicalName>
+    </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
     <None Remove="Segment\" />

Analytics-CSharp/Resources/link.xml

@@ -0,0 +1,11 @@
+<linker>
+    <assembly fullname="Segment.Analytics.CSharp" preserve="all" />
+    <assembly fullname="Coroutine.NET" preserve="all" />
+    <assembly fullname="Newtonsoft.Json" preserve="all" />
+    <assembly fullname="Serialization.NET" preserve="all" />
+    <assembly fullname="Sovran.NET" preserve="all" />
+    <assembly fullname="System.Core">
+        <type fullname="System.Linq.Expressions.Interpreter.LightLambda" preserve="all" />
+    </assembly>
+</linker>
+

Analytics-CSharp/Segment/Analytics/Utilities/UserPrefs.cs

@@ -1,10 +1,10 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Runtime.Serialization;
 using System.Threading;
 using System.Threading.Tasks;
 using Segment.Concurrent;
+using Segment.Serialization;
 
 namespace Segment.Analytics.Utilities
 {
@@ -67,9 +67,9 @@ public int GetInt(string key, int defaultValue = -1)
 
                 try
                 {
-                    ret = (int)cache[key];
+                    ret = Convert.ToInt32(cache[key]);
                 }
-                catch
+                catch 
                 {
                     ret = defaultValue;
                 }
@@ -88,7 +88,7 @@ public float GetFloat(string key, float defaultValue = -1.0f)
 
                 try
                 {
-                    ret = (float)cache[key];
+                    ret = float.Parse(Convert.ToString(cache[key]));
                 }
                 catch
                 {
@@ -109,7 +109,7 @@ public string GetString(string key, string defaultValue = null)
 
                 try
                 {
-                    ret = (string)cache[key];
+                    ret = Convert.ToString(cache[key]);
                 }
                 catch
                 {
@@ -195,21 +195,24 @@ private void WriteToFile(long memoryEpochSnapshot)
                 }
             }
 
+            FileStream fs = null;
             try
             {
-                var fs = _file.Open(FileMode.Create);
-                var serializer = new DataContractSerializer(cache.GetType());
-                serializer.WriteObject(fs, cache);
+                fs = _file.Open(FileMode.Create);
+                var json = JsonUtility.ToJson(cache);
+                var bytes = json.GetBytes();
+                fs.Write(bytes, 0, bytes.Length);
                 fs.Close();
-                
+
                 // successfully updated file, can safely delete backup and return
                 _backupFile.Delete();
                 diskEpoch = memoryEpoch;
-                
+
                 return;
             }
             catch (Exception e)
             {
+                fs?.Close();
                 Analytics.logger?.LogError(e, "Error encountered updating file.");
             }
 
@@ -263,31 +266,25 @@ private void LoadFromDisk()
                 }
             }
 
-            FileStream fs = null;
             Dictionary<string, object> dict = null;
 
             try
             {
-                fs = _file.Open(FileMode.OpenOrCreate);
-                if (fs.Length == 0)
+                var json = File.ReadAllText(_file.FullName);
+                if (string.IsNullOrEmpty(json))
                 {
                     dict = new Dictionary<string, object>();
                 }
                 else
                 {
-                    var deserializer = new DataContractSerializer(cache.GetType());
-                    dict = (Dictionary<string, object>) deserializer.ReadObject(fs);
+                    dict = JsonUtility.FromJson<Dictionary<string, object>>(json);
                 }
             }
             catch (Exception e)
             {
                 Analytics.logger?.LogError(e, "Error on deserializing cached user prefs.");
                 thrown = e;
             }
-            finally
-            {
-                fs?.Close();
-            }
 
             lock (mutex)
             {