From 218211bcf2d79bf8088aaa98e78221e256f24af7 Mon Sep 17 00:00:00 2001
From: Robert burner Schadek <robert.schadek@informatik.uni-oldenburg.de>
Date: Thu, 21 Dec 2023 15:39:13 +0100
Subject: [PATCH] generator started

---
 fakerjs2generator/dub.json           |   2 +-
 fakerjs2generator/source/app.d       |   2 +
 fakerjs2generator/source/defis.d     |   2 -
 fakerjs2generator/source/generator.d | 100 +++++++++++++++++++++++++++
 4 files changed, 103 insertions(+), 3 deletions(-)
 create mode 100644 fakerjs2generator/source/generator.d

diff --git a/fakerjs2generator/dub.json b/fakerjs2generator/dub.json
index 0aabd68..3636c23 100644
--- a/fakerjs2generator/dub.json
+++ b/fakerjs2generator/dub.json
@@ -6,4 +6,4 @@
 	"description": "faker.js to D converter",
 	"license": "GPL3",
 	"name": "fakerjs2generator"
-}
\ No newline at end of file
+}
diff --git a/fakerjs2generator/source/app.d b/fakerjs2generator/source/app.d
index bf6a007..5835e96 100644
--- a/fakerjs2generator/source/app.d
+++ b/fakerjs2generator/source/app.d
@@ -2,8 +2,10 @@ import std.stdio;
 
 import parser;
 import defis;
+import generator;
 
 void main() {
 	writeln("Edit source/app.d to start your project.");
 	Language en = parseLanguage("en");
+	generate(en, "en");
 }
diff --git a/fakerjs2generator/source/defis.d b/fakerjs2generator/source/defis.d
index 857c8c1..bf40565 100644
--- a/fakerjs2generator/source/defis.d
+++ b/fakerjs2generator/source/defis.d
@@ -1,7 +1,5 @@
 module defis;
 
-import std.typecons : Nullable;
-
 struct Mustache {
 	string str;
 }
diff --git a/fakerjs2generator/source/generator.d b/fakerjs2generator/source/generator.d
new file mode 100644
index 0000000..48bff02
--- /dev/null
+++ b/fakerjs2generator/source/generator.d
@@ -0,0 +1,100 @@
+module generator;
+
+import std.array : appender;
+import std.algorithm.iteration : filter;
+import std.algorithm.searching : endsWith;
+import std.exception : enforce;
+import std.conv : to;
+import std.uni : toUpper;
+import std.format : formattedWrite;
+import std.range : empty;
+import std.traits : FieldNameTuple;
+import std.stdio;
+
+import defis;
+
+void generate(Language lang, string langName) {
+	auto app = appender!string();
+	traverse(lang, app, []);
+	writeln(app.data);
+}
+
+void traverse(T,Out)(T t, ref Out o, string[] path) {
+	static if(T.stringof.endsWith("Folder") || is(T == Language)) {
+		static foreach(string mem; [FieldNameTuple!(T)].filter!(m => !m.empty)) {{
+			traverse(__traits(getMember, t, mem), o, path ~ mem);
+		}}
+	} else {
+		static if(is(T == string[])) {
+			genStringArray(t, o, path);
+		}
+		static if(is(T == Number[])) {
+			genNumberArray(t, o, path);
+		}
+	}
+}
+
+void genNumberArray(Out)(Number[] strs, ref Out o, string[] path) {
+}
+
+void genStringArray(Out)(string[] strs, ref Out o, string[] path) {
+	iformat(o, 1, "string %s() {\n", pathToFuncName(path));
+	iformat(o, 2, "const string[] strs =\n\t\t[ ");
+	str80(o, strs, 2);
+	o.put(" ];\n\n");
+	iformat(o, 2, "return choice(strs, this.rnd);\n\t}\n");
+}
+
+string pathToFuncName(string[] path) {
+	enforce(path.length > 1, to!string(path));
+	string ret = path[0];
+	foreach(it; path[1 .. $]) {
+		char up = to!char(it[0].toUpper());
+		string ta = up ~ it[1 .. $];
+		ret ~= ta;
+	}
+	return ret;
+}
+
+void iformat(Out,Args...)(ref Out o, size_t indent, string f, Args args) {
+	foreach(_; 0 .. indent) {
+		o.put('\t');
+	}
+	formattedWrite(o, f, args);
+}
+
+void str80(Out)(ref Out o, string[] strs, size_t tabs) {
+	size_t curStrCount;
+	size_t curLength = tabs * 4;
+	size_t curLineCount = 0;
+	foreach(idx, s; strs) {
+		if(curStrCount == 0) {
+			if(idx > 0) {
+				o.put(", ");
+				curLength += 2;
+			}
+			o.put('"');
+			o.put(s);
+			o.put('"');
+			curLength += s.length + 2;
+			++curStrCount;
+		} else {
+			if(curLength > 80) {
+				curLength = tabs * 4;
+				o.put('\n');
+				foreach(_; 0 .. tabs) {
+					o.put('\t');
+				}
+				curStrCount = 0;
+			}
+			if(idx > 0) {
+				o.put(", ");
+				curLength += 2;
+			}
+			o.put('"');
+			o.put(s);
+			o.put('"');
+			curLength += s.length + 2;
+		}
+	}
+}