137 lines
5.3 KiB
C#
137 lines
5.3 KiB
C#
using System;
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using System.Threading.Tasks;
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using Bit.Core.Abstractions;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Serialization;
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namespace Bit.App.Services
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{
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public class PreferencesStorageService : IStorageService
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{
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public static string KeyFormat = "bwPreferencesStorage:{0}";
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private readonly string _sharedName;
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private readonly JsonSerializerSettings _jsonSettings = new JsonSerializerSettings
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{
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ContractResolver = new CamelCasePropertyNamesContractResolver(),
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NullValueHandling = NullValueHandling.Ignore
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};
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public PreferencesStorageService(string sharedName)
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{
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_sharedName = sharedName;
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}
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public Task<T> GetAsync<T>(string key)
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{
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var formattedKey = string.Format(KeyFormat, key);
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if (!Xamarin.Essentials.Preferences.ContainsKey(formattedKey, _sharedName))
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{
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return Task.FromResult(default(T));
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}
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var objType = typeof(T);
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if (objType == typeof(string))
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{
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var val = Xamarin.Essentials.Preferences.Get(formattedKey, default(string), _sharedName);
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return Task.FromResult((T)(object)val);
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}
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else if (objType == typeof(bool) || objType == typeof(bool?))
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{
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var val = Xamarin.Essentials.Preferences.Get(formattedKey, default(bool), _sharedName);
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return Task.FromResult(ChangeType<T>(val));
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}
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else if (objType == typeof(int) || objType == typeof(int?))
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{
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var val = Xamarin.Essentials.Preferences.Get(formattedKey, default(int), _sharedName);
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return Task.FromResult(ChangeType<T>(val));
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}
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else if (objType == typeof(long) || objType == typeof(long?))
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{
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var val = Xamarin.Essentials.Preferences.Get(formattedKey, default(long), _sharedName);
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return Task.FromResult(ChangeType<T>(val));
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}
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else if (objType == typeof(double) || objType == typeof(double?))
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{
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var val = Xamarin.Essentials.Preferences.Get(formattedKey, default(double), _sharedName);
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return Task.FromResult(ChangeType<T>(val));
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}
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else if (objType == typeof(DateTime) || objType == typeof(DateTime?))
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{
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var val = Xamarin.Essentials.Preferences.Get(formattedKey, default(DateTime), _sharedName);
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return Task.FromResult(ChangeType<T>(val));
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}
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else
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{
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var val = Xamarin.Essentials.Preferences.Get(formattedKey, default(string), _sharedName);
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return Task.FromResult(JsonConvert.DeserializeObject<T>(val, _jsonSettings));
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}
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}
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public Task SaveAsync<T>(string key, T obj)
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{
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if (obj == null)
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{
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return RemoveAsync(key);
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}
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var formattedKey = string.Format(KeyFormat, key);
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var objType = typeof(T);
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if (objType == typeof(string))
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{
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Xamarin.Essentials.Preferences.Set(formattedKey, obj as string, _sharedName);
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}
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else if (objType == typeof(bool) || objType == typeof(bool?))
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{
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Xamarin.Essentials.Preferences.Set(formattedKey, (obj as bool?).Value, _sharedName);
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}
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else if (objType == typeof(int) || objType == typeof(int?))
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{
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Xamarin.Essentials.Preferences.Set(formattedKey, (obj as int?).Value, _sharedName);
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}
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else if (objType == typeof(long) || objType == typeof(long?))
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{
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Xamarin.Essentials.Preferences.Set(formattedKey, (obj as long?).Value, _sharedName);
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}
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else if (objType == typeof(double) || objType == typeof(double?))
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{
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Xamarin.Essentials.Preferences.Set(formattedKey, (obj as double?).Value, _sharedName);
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}
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else if (objType == typeof(DateTime) || objType == typeof(DateTime?))
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{
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Xamarin.Essentials.Preferences.Set(formattedKey, (obj as DateTime?).Value, _sharedName);
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}
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else
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{
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Xamarin.Essentials.Preferences.Set(formattedKey, JsonConvert.SerializeObject(obj, _jsonSettings),
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_sharedName);
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}
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return Task.FromResult(0);
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}
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public Task RemoveAsync(string key)
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{
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var formattedKey = string.Format(KeyFormat, key);
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if (Xamarin.Essentials.Preferences.ContainsKey(formattedKey, _sharedName))
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{
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Xamarin.Essentials.Preferences.Remove(formattedKey, _sharedName);
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}
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return Task.FromResult(0);
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}
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private static T ChangeType<T>(object value)
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{
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var t = typeof(T);
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if (t.IsGenericType && t.GetGenericTypeDefinition().Equals(typeof(Nullable<>)))
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{
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if (value == null)
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{
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return default(T);
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}
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t = Nullable.GetUnderlyingType(t);
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}
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return (T)Convert.ChangeType(value, t);
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}
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}
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}
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