From b77eb73caa4d389a195b4a78962a2610eb4b051a Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 19 Dec 2015 21:00:12 +0000
Subject: Add support for unpacking PostgreSQL text arrays from their string
 form

---
 gentoobrowse-api/domain/portage-models.ice    |  1 +
 gentoobrowse-api/service/Jamfile.jam          |  3 ++
 gentoobrowse-api/service/converters.cpp       | 22 +++++++++
 gentoobrowse-api/service/unpackPqTextArray.h  | 27 +++++++++++
 gentoobrowse-api/service/unpackPqTextArray.ll | 64 +++++++++++++++++++++++++++
 5 files changed, 117 insertions(+)
 create mode 100644 gentoobrowse-api/service/converters.cpp
 create mode 100644 gentoobrowse-api/service/unpackPqTextArray.h
 create mode 100644 gentoobrowse-api/service/unpackPqTextArray.ll

diff --git a/gentoobrowse-api/domain/portage-models.ice b/gentoobrowse-api/domain/portage-models.ice
index 744cbf5..4f98ce3 100644
--- a/gentoobrowse-api/domain/portage-models.ice
+++ b/gentoobrowse-api/domain/portage-models.ice
@@ -5,6 +5,7 @@
 
 module Gentoo {
 	sequence<byte> Image;
+	sequence<string> StringList;
 
 	class Category {
 		["slicer:db:pkey"]
diff --git a/gentoobrowse-api/service/Jamfile.jam b/gentoobrowse-api/service/Jamfile.jam
index b29063e..777c453 100644
--- a/gentoobrowse-api/service/Jamfile.jam
+++ b/gentoobrowse-api/service/Jamfile.jam
@@ -1,8 +1,10 @@
 import generators ;
 import type ;
+import lex ;
 
 lib gentoobrowse-service :
 	[ glob *.cpp ]
+	[ glob *.ll ]
 	[ glob-tree *.sql ]
 	[ glob ../domain/*.ice ]
 	:
@@ -18,6 +20,7 @@ lib gentoobrowse-service :
 	<library>..//boost_thread
 	<library>..//boost_date_time
 	<library>../..//glibmm
+	<include>.
 	: :
 	<include>.
 	<implicit-dependency>../api//gentoobrowse-api
diff --git a/gentoobrowse-api/service/converters.cpp b/gentoobrowse-api/service/converters.cpp
new file mode 100644
index 0000000..b0ffacf
--- /dev/null
+++ b/gentoobrowse-api/service/converters.cpp
@@ -0,0 +1,22 @@
+#include <portage-models.h>
+#include "unpackPqTextArray.h"
+#include <string>
+
+namespace Slicer {
+	::Gentoo::StringList
+	unpackPqTextArray(const std::string & s)
+	{
+		::Gentoo::StringList list;
+		std::stringstream ss(s);
+		::Portage::Utils::UnpackPqTextArray l(ss, list);
+		l.yylex();
+		return list;
+	}
+
+	std::string
+	packPqTextArray(const ::Gentoo::StringList &)
+	{
+		return std::string();
+	}
+}
+
diff --git a/gentoobrowse-api/service/unpackPqTextArray.h b/gentoobrowse-api/service/unpackPqTextArray.h
new file mode 100644
index 0000000..246be71
--- /dev/null
+++ b/gentoobrowse-api/service/unpackPqTextArray.h
@@ -0,0 +1,27 @@
+#ifndef JSONFLEXLEXER_H
+#define JSONFLEXLEXER_H
+
+#include <portage-models.h>
+#ifndef yyFlexLexer
+#define yyFlexLexer pqBaseFlexLexer
+#include <FlexLexer.h>
+#endif
+
+namespace Portage {
+	namespace Utils {
+		class UnpackPqTextArray : public yyFlexLexer {
+			public:
+				UnpackPqTextArray(std::istream &, ::Gentoo::StringList & sl);
+
+				int yylex() override;
+				void LexerError(const char * msg) override;
+
+			private:
+				::Gentoo::StringList & list;
+		};
+	}
+}
+
+#endif
+
+
diff --git a/gentoobrowse-api/service/unpackPqTextArray.ll b/gentoobrowse-api/service/unpackPqTextArray.ll
new file mode 100644
index 0000000..6281063
--- /dev/null
+++ b/gentoobrowse-api/service/unpackPqTextArray.ll
@@ -0,0 +1,64 @@
+%option batch
+%option c++
+%option noyywrap
+%option 8bit
+%option stack
+%option yylineno
+%option yyclass="Portage::Utils::UnpackPqTextArray"
+%option prefix="pqBase"
+
+%{
+#include "unpackPqTextArray.h"
+#include <boost/algorithm/string/trim.hpp>
+#pragma GCC diagnostic ignored "-Wsign-compare"
+%}
+
+begin "{"
+end "}"
+comma ,
+unquoted [^,\"}]+
+quoted (\"[^\"]+\")
+
+%x FIRST
+%x AFTER
+%x NEXT
+
+%%
+
+{begin} {
+	yy_push_state(FIRST);
+}
+<FIRST,AFTER>{end} {
+	yy_pop_state();
+}
+<FIRST,NEXT>{unquoted} {
+	list.push_back(YYText());
+	BEGIN(AFTER);
+}
+<FIRST,NEXT>{quoted} {
+	list.push_back(YYText());
+	boost::algorithm::trim_if(list.back(), [](auto c){ return c == '"'; });
+	BEGIN(AFTER);
+}
+<AFTER>{comma} {
+	BEGIN(NEXT);
+}
+
+%%
+
+namespace Portage {
+	namespace Utils {
+		UnpackPqTextArray::UnpackPqTextArray(std::istream & f, ::Gentoo::StringList & sl) :
+			yyFlexLexer(&f, NULL),
+			list(sl)
+		{
+		}
+
+		void
+		UnpackPqTextArray::LexerError(const char * msg)
+		{
+			throw std::runtime_error(msg);
+		}
+  }
+}
+
-- 
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