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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
* Copyright (c) 2010 Jordi Puigdellívol <jordi@gloobus.net>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* version 3.0 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3.0 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Authors: Jordi Puigdellívol <jordi@gloobus.net>
* ammonkey <am.monkeyd@gmail.com>
*
Marlin Tagging system
//Dependences
libsqlite3-dev
//To create de table
create table tags (uri TEXT, color INT, tags TEXT);
//To compile this sample
valac --pkg sqlite3 -o sqlitesample SqliteSample.vala
valac --pkg sqlite3 --pkg gio-2.0 -o sqlitesample marlin_tagging.vala && ./sqlitesample
*/
[DBus (name = "org.pantheon.files.db")]
public class MarlinTags : Object {
protected static Sqlite.Database db;
public MarlinTags (){
openMarlinDB ();
}
protected static void fatal (string op, int res) {
error("%s: [%d] %s", op, res, db.errmsg());
}
private static int show_table_callback (int n_columns, string[] values, string[] column_names) {
for (int i = 0; i < n_columns; i++) {
stdout.printf ("%s = %s\n", column_names[i], values[i]);
}
stdout.printf ("\n");
return 0;
}
public bool openMarlinDB () {
File home_dir = File.new_for_path (Environment.get_home_dir ());
File data_dir = home_dir.get_child (".config").get_child ("marlin");
try {
if (!data_dir.query_exists (null))
data_dir.make_directory_with_parents (null);
} catch (Error err) {
stderr.printf ("Unable to create data directory %s: %s", data_dir.get_path (), err.message);
}
string marlin_db_path = data_dir.get_child ("marlin.db").get_path ();
//The database must exists, add here the full path
print ("Database path: %s \n", marlin_db_path);
openDB (marlin_db_path);
return true;
}
private bool openDB (string dbpath) {
int rc = Sqlite.Database.open_v2 (dbpath, out db, Sqlite.OPEN_READWRITE | Sqlite.OPEN_CREATE, null);
if (rc != Sqlite.OK) {
stderr.printf ("Can't open database: %d, %s\n", rc, db.errmsg ());
return false;
}
// disable synchronized commits for performance reasons ... this is not vital
rc = db.exec ("PRAGMA synchronous=OFF");
if (rc != Sqlite.OK)
stdout.printf ("Unable to disable synchronous mode %d, %s\n", rc, db.errmsg ());
Sqlite.Statement stmt;
int res = db.prepare_v2 ("CREATE TABLE IF NOT EXISTS tags ("
+ "id INTEGER PRIMARY KEY, "
+ "uri TEXT UNIQUE NOT NULL, "
+ "color INTEGER DEFAULT 0, "
+ "tags TEXT NULL, "
+ "content_type TEXT, "
+ "modified_time INTEGER DEFAULT 0, "
+ "dir TEXT "
+ ")", -1, out stmt);
assert (res == Sqlite.OK);
res = stmt.step ();
if (res != Sqlite.DONE)
fatal ("create tags table", res);
/* TODO check result of the last sql command */
upgrade_database ();
return true;
}
#if 0
public async bool record_uri (string raw_uri, string content_type, int modified_time) {
var uri = escape(raw_uri);
var sql = "INSERT OR REPLACE INTO tags (uri,content_type,modified_time) VALUES ('"+uri+"','"+content_type+"',"+modified_time.to_string()+");\n";
int rc = db.exec (sql, null, null);
if (rc != Sqlite.OK) {
stderr.printf ("[record_uri: SQL error] %d, %s\n", rc, db.errmsg ());
return false;
}
return true;
}
#endif
public async bool record_uris (Variant[] locations, string directory) {
string sql = "";
foreach (var location_variant in locations) {
VariantIter iter = location_variant.iterator ();
var uri = iter.next_value ().get_string ();
var content_type = iter.next_value ().get_string ();
var modified_time = iter.next_value ().get_string ();
var color = iter.next_value ().get_string ();
sql += "INSERT OR REPLACE INTO tags (uri, content_type, color, modified_time, dir) VALUES ('%s', '%s', %s, %s, '%s');\n".printf (uri, content_type, color, modified_time, directory);
}
int rc = db.exec (sql, null, null);
if (rc != Sqlite.OK) {
stderr.printf ("[record_uri: SQL error] %d, %s\n", rc, db.errmsg ());
return false;
}
return true;
}
private string escape (string input) {
return input.replace ("'", "''");
}
public async Variant get_uri_infos (string raw_uri) {
Idle.add (get_uri_infos.callback);
yield;
var uri = escape (raw_uri);
Sqlite.Statement stmt;
var vb = new VariantBuilder (new VariantType ("(as)"));
int rc = db.prepare_v2 ("select modified_time, content_type, color from tags where uri='%s'".printf (uri),
-1, out stmt);
assert (rc == Sqlite.OK);
rc = stmt.step();
vb.open (new VariantType ("as"));
switch (rc) {
case Sqlite.DONE:
break;
case Sqlite.ROW:
vb.add ("s", stmt.column_text (0));
var content_type = stmt.column_text (1);
vb.add ("s", (content_type != null) ? content_type : "");
vb.add ("s", stmt.column_text (2));
break;
default:
printerr ("[get_uri_infos]: Error: %d, %s\n", rc, db.errmsg ());
break;
}
vb.close ();
return vb.end ();
}
#if 0
public async int getColor(string raw_uri)
{
Idle.add (getColor.callback);
yield;
var uri = escape(raw_uri);
string c = "select color from tags where uri='" + uri + "'";
Statement stmt;
int rc = 0;
int col, cols;
string txt = "0";
if ((rc = db.prepare_v2 (c, -1, out stmt, null)) == 1) {
printerr ("[getColor]: SQL error: %d, %s\n", rc, db.errmsg ());
return -1;
}
cols = stmt.column_count();
do {
rc = stmt.step();
switch (rc) {
case Sqlite.DONE:
break;
case Sqlite.ROW:
for (col = 0; col < cols; col++) {
txt = stmt.column_text(col);
}
break;
default:
printerr ("[getColor]: Error: %d, %s\n", rc, db.errmsg ());
break;
}
} while (rc == Sqlite.ROW);
int ret = int.parse(txt);
/* It appears that a db error return -1, we got to check the value just in case */
if(ret == -1){
ret = 0;
}
return ret;
}
#endif
public async bool deleteEntry (string uri) {
Idle.add (deleteEntry.callback);
yield;
string c = "delete from tags where uri='" + uri + "'";
int rc = db.exec (c, null, null);
if (rc != Sqlite.OK) {
stderr.printf ("[deleteEntry: SQL error] %d, %s\n", rc, db.errmsg ());
return false;
}
return true;
}
public bool showTable (string table) {
stdout.printf ("showTable\n");
string consult = "select * from " + table;
int rc = db.exec (consult, show_table_callback, null);
if (rc != Sqlite.OK) {
stderr.printf ("[showTable: SQL error]: %d, %s\n", rc, db.errmsg ());
return false;
}
return true;
}
public bool clearDB () {
string c = "delete from tags";
int rc = db.exec (c, null, null);
if (rc != Sqlite.OK) {
stderr.printf ("[clearDB: SQL error] %d, %s\n", rc, db.errmsg ());
return false;
}
return true;
}
private bool has_column (string table_name, string column_name) {
Sqlite.Statement stmt;
int res = db.prepare_v2("PRAGMA table_info(%s)".printf (table_name), -1, out stmt);
assert (res == Sqlite.OK);
for (;;) {
res = stmt.step ();
if (res == Sqlite.DONE) {
break;
} else if (res != Sqlite.ROW) {
fatal ("has_column %s".printf(table_name), res);
break;
} else {
string column = stmt.column_text (1);
if (column != null && column == column_name)
return true;
}
}
return false;
}
private bool add_column (string table_name, string column_name, string column_constraints) {
Sqlite.Statement stmt;
int res = db.prepare_v2 ("ALTER TABLE %s ADD COLUMN %s %s".printf (table_name, column_name,
column_constraints), -1, out stmt);
assert (res == Sqlite.OK);
res = stmt.step ();
if (res != Sqlite.DONE) {
critical ("Unable to add column %s %s %s: (%d) %s", table_name, column_name, column_constraints,
res, db.errmsg ());
return false;
}
return true;
}
private void upgrade_database () {
if (!has_column("tags", "content_type")) {
message("upgrade_database: adding content_type column to tags");
if (!add_column("tags", "content_type", "TEXT"))
warning ("UPGRADE_ERROR");
}
if (!has_column("tags", "modified_time")) {
message("upgrade_database: adding modified_time column to tags");
if (!add_column("tags", "modified_time", "INTEGER DEFAULT 0"))
warning ("UPGRADE_ERROR");
}
if (!has_column("tags", "dir")) {
message("upgrade_database: adding dir column to tags");
if (!add_column("tags", "dir", "TEXT"))
warning ("UPGRADE_ERROR");
}
}
}
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