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author | TrueKuehli <rctcoaster2000@hotmail.de> | 2018-09-29 17:19:43 +0200 |
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committer | TrueKuehli <rctcoaster2000@hotmail.de> | 2018-09-29 17:19:43 +0200 |
commit | b83fc90abacc73262e0f8404cebadf6d64eb10ae (patch) | |
tree | d63b921c9bcdf8d381fc02ecfb0a1dd425ebb561 /FireBase/Offline/Internals/MemberAccessVisitor.cs | |
parent | 586d564f3c4c509c1aae931331e96f0382178f80 (diff) | |
parent | 680967aee589e4a8d277044b204de07cbe32f41e (diff) |
Merge branch 'WebApi' of https://github.com/TrueDoctor/DiscoBot into WebApi
Merged the stuffs
Diffstat (limited to 'FireBase/Offline/Internals/MemberAccessVisitor.cs')
-rw-r--r-- | FireBase/Offline/Internals/MemberAccessVisitor.cs | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/FireBase/Offline/Internals/MemberAccessVisitor.cs b/FireBase/Offline/Internals/MemberAccessVisitor.cs new file mode 100644 index 0000000..1f7cb11 --- /dev/null +++ b/FireBase/Offline/Internals/MemberAccessVisitor.cs @@ -0,0 +1,51 @@ +namespace Firebase.Database.Offline.Internals +{ + using System.Collections.Generic; + using System.Linq.Expressions; + using System.Reflection; + + using Newtonsoft.Json; + + public class MemberAccessVisitor : ExpressionVisitor + { + private readonly IList<string> propertyNames = new List<string>(); + + private bool wasDictionaryAccess; + + public IEnumerable<string> PropertyNames => this.propertyNames; + + public MemberAccessVisitor() + { + } + + public override Expression Visit(Expression expr) + { + if (expr?.NodeType == ExpressionType.MemberAccess) + { + if (this.wasDictionaryAccess) + { + this.wasDictionaryAccess = false; + } + else + { + var memberExpr = (MemberExpression)expr; + var jsonAttr = memberExpr.Member.GetCustomAttribute<JsonPropertyAttribute>(); + + this.propertyNames.Add(jsonAttr?.PropertyName ?? memberExpr.Member.Name); + } + } + else if (expr?.NodeType == ExpressionType.Call) + { + var callExpr = (MethodCallExpression)expr; + if (callExpr.Method.Name == "get_Item" && callExpr.Arguments.Count == 1) + { + var e = Expression.Lambda(callExpr.Arguments[0]).Compile(); + this.propertyNames.Add(e.DynamicInvoke().ToString()); + this.wasDictionaryAccess = callExpr.Arguments[0].NodeType == ExpressionType.MemberAccess; + } + } + + return base.Visit(expr); + } + } +} |