106 lines
3.3 KiB
C#
106 lines
3.3 KiB
C#
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using System;
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using System.Collections.Generic;
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namespace LeanCloud.Storage.Internal
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{
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// TODO: (richardross) refactor entire LeanCloud coder interfaces.
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public class AVObjectCoder
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{
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private static readonly AVObjectCoder instance = new AVObjectCoder();
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public static AVObjectCoder Instance
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{
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get
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{
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return instance;
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}
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}
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// Prevent default constructor.
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private AVObjectCoder() { }
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public IDictionary<string, object> Encode<T>(T state,
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IDictionary<string, IAVFieldOperation> operations,
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AVEncoder encoder) where T : IObjectState
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{
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var result = new Dictionary<string, object>();
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foreach (var pair in operations)
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{
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// AVRPCSerialize the data
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var operation = pair.Value;
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result[pair.Key] = encoder.Encode(operation);
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}
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return result;
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}
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public IObjectState Decode(IDictionary<string, object> data,
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AVDecoder decoder)
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{
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IDictionary<string, object> serverData = new Dictionary<string, object>();
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var mutableData = new Dictionary<string, object>(data);
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string objectId = extractFromDictionary<string>(mutableData, "objectId", (obj) =>
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{
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return obj as string;
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});
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DateTime? createdAt = extractFromDictionary<DateTime?>(mutableData, "createdAt", (obj) =>
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{
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return AVDecoder.ParseDate(obj as string);
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});
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DateTime? updatedAt = extractFromDictionary<DateTime?>(mutableData, "updatedAt", (obj) =>
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{
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return AVDecoder.ParseDate(obj as string);
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});
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if (mutableData.ContainsKey("ACL"))
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{
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serverData["ACL"] = extractFromDictionary<AVACL>(mutableData, "ACL", (obj) =>
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{
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return new AVACL(obj as IDictionary<string, object>);
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});
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}
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string className = extractFromDictionary<string>(mutableData, "className", obj =>
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{
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return obj as string;
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});
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if (createdAt != null && updatedAt == null)
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{
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updatedAt = createdAt;
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}
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// Bring in the new server data.
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foreach (var pair in mutableData)
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{
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if (pair.Key == "__type" || pair.Key == "className")
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{
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continue;
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}
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var value = pair.Value;
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serverData[pair.Key] = decoder.Decode(value);
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}
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return new MutableObjectState
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{
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ObjectId = objectId,
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CreatedAt = createdAt,
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UpdatedAt = updatedAt,
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ServerData = serverData,
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ClassName = className
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};
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}
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private T extractFromDictionary<T>(IDictionary<string, object> data, string key, Func<object, T> action)
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{
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T result = default(T);
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if (data.ContainsKey(key))
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{
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result = action(data[key]);
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data.Remove(key);
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}
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return result;
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}
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}
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}
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