repos/DecentralizedMedia/Library.cpp

// Library
//
// Douglas Thrift
//
// $Id$

#include <menes/c++/standard.hh>

#include <menes/dbi/resultset.hpp>

#include "Library.hpp"

Library::Library(const _R<Connector>& connector) : connector(connector)
{
        _R<dbi::Connection> connection(connector->Connect());

        connection->Execute(_B("UPDATE files SET live = FALSE"));

        connector->Release(connection);
}

_L<MediaFolder> Library::GetFolders(unsigned page) const
{
        _R<dbi::Connection> connection(connector->Connect());
        _R<dbi::ResultSet> roots(connection->Parse(_B("SELECT DISTINCT root FROM files WHERE live = TRUE ORDER By root LIMIT 50 OFFSET ?"))->Execute(page * 50));
        _L<MediaFolder> folders;

        while (roots->MoveNext())
                folders.InsertLast(GetFolder(roots->GetString(_B("root"))));

        connector->Release(connection);

        return folders;
}

_L<MediaFile> Library::GetFiles(const _L<By>& bys, const _L<cse::String>& items, unsigned page) const
{
        if (bys.IsEmpty() || ext::Contains(bys, By::LAST) || bys.GetSize() != items.GetSize())
                return _L<MediaFile>();

        _S<ios::String> statement_;

        statement_ << _B("SELECT path FROM files WHERE live = TRUE ");

        _foreach (const _L<By>, by, bys)
                statement_ << _B("AND ") << *by << _B(" = ? ");

        statement_ << _B("ORDER BY path LIMIT 50 OFFSET ?");

        _R<dbi::Connection> connection(connector->Connect());
        _R<dbi::Statement> statement(connection->Parse(statement_));

        _foreach (const _L<cse::String>, item, items)
                statement->Set(_index, *item);

        statement->Set(items.GetSize(), page * 50);

        _R<dbi::ResultSet> paths(statement->Execute());
        _L<MediaFile> files;

        while (paths->MoveNext())
                files.InsertLast(GetFile(paths->GetString(_B("path"))));

        connector->Release(connection);

        return files;
}

_L<cse::String> Library::GetItems(_L<By> bys, _L<cse::String> items, unsigned page) const
{
        if (bys.IsEmpty() || ext::Contains(bys, By::LAST) || bys.GetSize() - 1 != items.GetSize())
                return _L<cse::String>();

        _S<ios::String> statement_;
        By by(bys.Last());

        statement_ << _B("SELECT DISTINCT ") << by << _B(" FROM files WHERE live = TRUE ");

        bys.RemoveLast();

        _foreach (const _L<By>, by_, bys)
                statement_ << _B("AND ") << *by_ << _B(" = ? ");

        statement_ << _B("ORDER BY ") << by << _B(" LIMIT 50 OFFSET ?");

        _R<dbi::Connection> connection(connector->Connect());
        _R<dbi::Statement> statement(connection->Parse(statement_));

        _foreach (const _L<cse::String>, item, items)
                statement->Set(_index, *item);

        statement->Set(items.GetSize(), page * 50);

        _R<dbi::ResultSet> items_(statement->Execute());
        
        items.Clear();

        while (items_->MoveNext())
                items.InsertLast(items_->GetString(lexical_cast<cse::String>(by)));

        connector->Release(connection);

        return items;
}
Revision:	555
Committed:	2005-07-10T21:18:35-07:00 (19 years, 11 months ago) by douglas
File size:	2702 byte(s)
Log Message:	Connector!
#	User	Rev	Content
1	douglas	542	// Library
2			//
3			// Douglas Thrift
4			//
5			// $Id$
6
7	douglas	553	#include <menes/c++/standard.hh>
8	douglas	542
9	douglas	549	#include <menes/dbi/resultset.hpp>
10	douglas	542
11			#include "Library.hpp"
12
13	douglas	555	Library::Library(const _R<Connector>& connector) : connector(connector)
14	douglas	542	{
15	douglas	555	_R<dbi::Connection> connection(connector->Connect());
16
17	douglas	542	connection->Execute(_B("UPDATE files SET live = FALSE"));
18	douglas	555
19			connector->Release(connection);
20	douglas	542	}
21
22	douglas	554	_L<MediaFolder> Library::GetFolders(unsigned page) const
23	douglas	542	{
24	douglas	555	_R<dbi::Connection> connection(connector->Connect());
25	douglas	554	_R<dbi::ResultSet> roots(connection->Parse(_B("SELECT DISTINCT root FROM files WHERE live = TRUE ORDER By root LIMIT 50 OFFSET ?"))->Execute(page * 50));
26	douglas	552	_L<MediaFolder> folders;
27	douglas	542
28	douglas	552	while (roots->MoveNext())
29			folders.InsertLast(GetFolder(roots->GetString(_B("root"))));
30	douglas	542
31	douglas	555	connector->Release(connection);
32
33	douglas	552	return folders;
34	douglas	542	}
35
36	douglas	554	_L<MediaFile> Library::GetFiles(const _L<By>& bys, const _L<cse::String>& items, unsigned page) const
37	douglas	542	{
38	douglas	552	if (bys.IsEmpty() \|\| ext::Contains(bys, By::LAST) \|\| bys.GetSize() != items.GetSize())
39			return _L<MediaFile>();
40	douglas	542
41	douglas	552	_S<ios::String> statement_;
42	douglas	542
43	douglas	552	statement_ << _B("SELECT path FROM files WHERE live = TRUE ");
44	douglas	542
45	douglas	552	_foreach (const _L<By>, by, bys)
46	douglas	554	statement_ << _B("AND ") << *by << _B(" = ? ");
47	douglas	542
48	douglas	554	statement_ << _B("ORDER BY path LIMIT 50 OFFSET ?");
49	douglas	542
50	douglas	555	_R<dbi::Connection> connection(connector->Connect());
51	douglas	552	_R<dbi::Statement> statement(connection->Parse(statement_));
52	douglas	542
53	douglas	552	_foreach (const _L<cse::String>, item, items)
54			statement->Set(_index, *item);
55	douglas	542
56	douglas	554	statement->Set(items.GetSize(), page * 50);
57
58	douglas	552	_R<dbi::ResultSet> paths(statement->Execute());
59			_L<MediaFile> files;
60	douglas	542
61	douglas	552	while (paths->MoveNext())
62			files.InsertLast(GetFile(paths->GetString(_B("path"))));
63
64	douglas	555	connector->Release(connection);
65
66	douglas	552	return files;
67	douglas	542	}
68
69	douglas	554	_L<cse::String> Library::GetItems(_L<By> bys, _L<cse::String> items, unsigned page) const
70	douglas	542	{
71	douglas	552	if (bys.IsEmpty() \|\| ext::Contains(bys, By::LAST) \|\| bys.GetSize() - 1 != items.GetSize())
72			return _L<cse::String>();
73	douglas	542
74	douglas	552	_S<ios::String> statement_;
75			By by(bys.Last());
76	douglas	554
77	douglas	552	statement_ << _B("SELECT DISTINCT ") << by << _B(" FROM files WHERE live = TRUE ");
78	douglas	542
79	douglas	552	bys.RemoveLast();
80
81			_foreach (const _L<By>, by_, bys)
82			statement_ << _B("AND ") << *by_ << _B(" = ? ");
83
84	douglas	554	statement_ << _B("ORDER BY ") << by << _B(" LIMIT 50 OFFSET ?");
85	douglas	552
86	douglas	555	_R<dbi::Connection> connection(connector->Connect());
87	douglas	552	_R<dbi::Statement> statement(connection->Parse(statement_));
88
89			_foreach (const _L<cse::String>, item, items)
90			statement->Set(_index, *item);
91
92	douglas	554	statement->Set(items.GetSize(), page * 50);
93
94	douglas	552	_R<dbi::ResultSet> items_(statement->Execute());
95
96			items.Clear();
97
98			while (items_->MoveNext())
99	douglas	554	items.InsertLast(items_->GetString(lexical_cast<cse::String>(by)));
100	douglas	552
101	douglas	555	connector->Release(connection);
102
103	douglas	552	return items;
104	douglas	542	}