mirror of https://github.com/Hax-io/libpb
130 lines
2.9 KiB
D
130 lines
2.9 KiB
D
module libpb.deserialization;
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import std.json;
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import std.traits : FieldTypeTuple, FieldNameTuple;
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public RecordType fromJSON(RecordType)(JSONValue jsonIn)
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{
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RecordType record;
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// Alias as to only expand later when used in compile-time
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alias structTypes = FieldTypeTuple!(RecordType);
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alias structNames = FieldNameTuple!(RecordType);
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alias structValues = record.tupleof;
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static foreach(cnt; 0..structTypes.length)
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{
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debug(dbg)
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{
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pragma(msg, structTypes[cnt]);
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pragma(msg, structNames[cnt]);
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// pragma(msg, structValues[cnt]);
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}
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//TODO: Add all integral types
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static if(__traits(isSame, mixin(structTypes[cnt]), int))
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{
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mixin("record."~structNames[cnt]) = cast(int)jsonIn[structNames[cnt]].integer();
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}
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else static if(__traits(isSame, mixin(structTypes[cnt]), uint))
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{
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mixin("record."~structNames[cnt]) = cast(uint)jsonIn[structNames[cnt]].integer();
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}
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else static if(__traits(isSame, mixin(structTypes[cnt]), ulong))
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{
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mixin("record."~structNames[cnt]) = cast(ulong)jsonIn[structNames[cnt]].integer();
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}
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else static if(__traits(isSame, mixin(structTypes[cnt]), long))
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{
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mixin("record."~structNames[cnt]) = cast(long)jsonIn[structNames[cnt]].integer();
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}
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else static if(__traits(isSame, mixin(structTypes[cnt]), string))
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{
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mixin("record."~structNames[cnt]) = jsonIn[structNames[cnt]].str();
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debug(dbg)
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{
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pragma(msg,"record."~structNames[cnt]);
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}
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}
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else static if(__traits(isSame, mixin(structTypes[cnt]), JSONValue))
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{
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mixin("record."~structNames[cnt]) = jsonIn[structNames[cnt]];
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debug(dbg)
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{
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pragma(msg,"record."~structNames[cnt]);
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}
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}
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else static if(__traits(isSame, mixin(structTypes[cnt]), bool))
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{
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mixin("record."~structNames[cnt]) = jsonIn[structNames[cnt]].boolean();
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debug(dbg)
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{
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pragma(msg,"record."~structNames[cnt]);
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}
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}
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//FIXME: Not sure how to get array support going, very new to meta programming
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else static if(__traits(isSame, mixin(structTypes[cnt]), mixin(structTypes[cnt])[]))
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{
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mixin("record."~structNames[cnt]) = jsonIn[structNames[cnt]].boolean();
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debug(dbg)
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{
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pragma(msg,"record."~structNames[cnt]);
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}
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}
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else
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{
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// throw new
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//TODO: Throw error
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debug(dbg)
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{
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pragma(msg, "Unknown type for de-serialization");
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}
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}
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}
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return record;
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}
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unittest
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{
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import std.string : cmp;
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import std.stdio : writeln;
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struct Person
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{
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public string firstname, lastname;
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public int age;
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public bool isMale;
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public JSONValue obj;
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public int[] list;
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}
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JSONValue json = parseJSON(`{
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"firstname" : "Tristan",
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"lastname": "Kildaire",
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"age": 23,
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"obj" : {"bruh":1},
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"isMale": true,
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"list": [1,2,3]
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}
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`);
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Person person = fromJSON!(Person)(json);
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debug(dbg)
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{
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writeln(person);
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}
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assert(cmp(person.firstname, "Tristan") == 0);
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assert(cmp(person.lastname, "Kildaire") == 0);
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assert(person.age == 23);
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assert(person.isMale == true);
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assert(person.obj["bruh"].integer() == 1);
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//TODO: list test case
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}
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