nxt.translation source code

1 /++ Translations.
2 	Test: dmd -version=integration_test -version=show -vcolumns -preview=in -preview=dip1000 -g -checkaction=context -allinst -unittest -i -I.. -main -run translation.d
3  +/
4 module nxt.translation;
5 
6 // version = integration_test;
7 
8 import nxt.iso_639_1 : Language;
9 
10 @safe:
11 
12 /++ Translate `text` from `sourceLanguage` to `targetLanguage` via Google Translate.
13  +/
14 string translateByGoogle(in char[] text, in Language sourceLanguage, in Language targetLanguage) @trusted {
15 	import std.conv : to;
16 	return translateByGoogle(text, sourceLanguage.to!string, targetLanguage.to!string);
17 ;
18 }
19 
20 /++ Translate `text` from `sourceLangCodeCode` to `targetLangCodeCode` via Google Translate.
21  +/
22 string translateByGoogle(in char[] text, in char[] sourceLangCode, in char[] targetLangCode) @trusted {
23 	import std.conv : to;
24 	import std.uri : encode;
25 
26 	import std.net.curl : HTTP;
27 	const msg = "http://translate.googleapis.com/translate_a/single?client=gtx&sl="~sourceLangCode ~"&tl="~targetLangCode ~ "&dt=t&q="~encode(text);
28 	auto http = HTTP(msg);
29 	http.onReceiveStatusLine = (HTTP.StatusLine status) {
30 		if (status.code != 200)
31 			throw new Exception("Error " ~ status.code.to!string ~ " (" ~ status.reason.to!string ~ ")");
32 	};
33 
34 	string responseJson;
35 	http.onReceive = (ubyte[] data) {
36 		responseJson = cast(string) data;
37 		return data.length;
38 	};
39 
40 	http.perform();
41 
42 	typeof(return) result;
43 	import std.json : parseJSON, JSONType;
44 	foreach (const entry; responseJson.parseJSON().array) {
45 		import std.exception : enforce;
46 		if (entry.type is JSONType.array) {
47 			import std.algorithm : each;
48 			foreach (const second; entry.array) {
49 				if (second.type is JSONType.array && second[0].type is JSONType..string) {
50 					result ~= second[0].str;
51 				}
52 			}
53 		}
54 	}
55 
56 	return result;
57 }
58 
59 version(integration_test)
60 @safe unittest {
61 	const text = "Text intended for translation into LANGUAGE";
62 	assert(text.tr(Language.en, Language.de) == "Text, der in die SPRACHE übersetzt werden soll");
63 	assert(text.tr(Language.en, Language.tr) == "LANGUAGE diline çevrilmesi amaçlanan metin");
64 	assert(text.tr(Language.en, Language.sv) == "Text avsedd för översättning till SPRÅK");
65 	assert(text.tr("engb", "sv") == "Text avsedd för översättning till SPRÅK");
66 	assert(text.tr("en-GB", "sv") == "Text avsedd för översättning till SPRÅK");
67 	assert(text.tr("en", "zh-CN") == "打算翻译成语言的文本");
68 	assert(text.tr("en", "zh-TW") == "打算翻譯成語言的文本");
69 }
70 
71 version(unittest)
72 	private static alias tr = translateByGoogle;