konnexengine.money.blueprint source code

1 module konnexengine.money.blueprint;
2 
3 import std.conv: to;
4 import std.uuid: UUID, sha1UUID;
5 import std.datetime: SysTime, Clock, DateTime;
6 import std.format;
7 
8 import vibe.core.log: logInfo;
9 import money;
10 
11 class Amount 
12 {
13 	import money;
14 	
15 	this(string symbol, double amount)
16 	{
17 		this.timestamp = Clock.currTime();
18 		auto payload = "" ~ symbol ~ amount.to!string;
19 		DateTime ts = cast(DateTime)timestamp;
20 		this.id = sha1UUID(payload, sha1UUID(payload ~ ts.toISOExtString()));
21 		this.symbol = symbol;
22 		this.amount = amount;
23 	}
24 
25 	UUID id;
26 	string symbol;
27 	double amount;
28 	SysTime timestamp;
29 }
30 
31 class Currency
32 {
33 	this (string symbol, string name, ubyte decimals) {
34 		this.id = sha1UUID(symbol, sha1UUID("name: " ~ name));
35 		this.symbol = symbol;
36 		this.name = name;
37 		this.decimals = decimals;
38 	}
39 	UUID id;
40 	string symbol;
41 	string name;
42 	ubyte decimals;
43 }
44 
45 /// `createAmountIn(T)(T t, double amount)`: `template function returns Amount`
46 Amount createAmountIn(T)(T t, double amount) {
47 	return new Amount(t.symbol, amount);
48 }
49 ///
50 unittest {
51 	auto GBP = new Currency("GBP", "Great British Pound", 2);
52 	import vibe.core.log: logInfo;
53 	logInfo("" ~ GBP.symbol ~ " - " ~ GBP.name ~ "");
54 	auto amount = createAmountIn!Currency(GBP, 1000);
55 	logInfo(amount.id.to!string);
56 	logInfo(amount.symbol.to!string);
57 	logInfo(amount.amount.to!string);
58 	auto ts = cast(DateTime) amount.timestamp;
59 	logInfo(ts.toISOExtString());
60 
61 	
62 	assert(is(typeof(GBP) == Currency));
63 	assert(is(typeof(amount) == Amount));
64 }
65 
66 /** `createMoneyIn (T)(T t)` 
67 ```d
68 template function returns currency
69 ```
70  */
71 // string createMoneyIn (T)(T t)
72 // {
73 // 	alias CUR = currency!(t.symbol);
74 // 	logInfo(format("%.2f", CUR(t.amount)));
75 // 	return format("%.2f", CUR(t.amount));
76 // }
77 ///
78 unittest {
79 	alias GBP = currency!("GBP");
80 	// auto a = createAmountIn!Currency(GBP, 1000);
81 	// auto money = createMoneyIn!Amount(a);
82 	logInfo(format("%.2f", GBP(1000)+GBP(2341.64)));
83 	// assert(is(typeof(money) == currency));
84 	// assert(is(typeof(a) == Amount));
85 	// assert(is(typeof(GBP) == currency));
86 }