1 /* This file is part of Cinaest.
3 * Copyright (C) 2009 Philipp Zabel
5 * Cinaest is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * Cinaest is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with Cinaest. If not, see <http://www.gnu.org/licenses/>.
21 class IMDbSqlite : Object {
25 public delegate void ReceiveMovieFunction (string title, int year, int rating, int genres);
27 public IMDbSqlite (string filename) {
30 genres = new List<string> ();
32 rc = Database.open (filename, out db);
33 if (rc != Sqlite.OK) {
34 stderr.printf ("Can't open database: %d, %s\n", rc, db.errmsg ());
38 rc = db.exec ("PRAGMA journal_mode = OFF;", callback, null);
39 if (rc != Sqlite.OK) {
40 stderr.printf ("Can't turn off journal mode: %d, %s\n", rc, db.errmsg ());
44 rc = db.exec ("PRAGMA locking_mode = EXCLUSIVE;", callback, null);
45 if (rc != Sqlite.OK) {
46 stderr.printf ("Can't get exclusive lock: %d, %s\n", rc, db.errmsg ());
50 rc = db.exec ("PRAGMA synchronous = OFF;", callback, null);
52 stderr.printf ("Can't turn off synchronous access: %d, %s\n", rc, db.errmsg ());
56 public static int callback (int n_columns, string[] values,
57 string[] column_names) {
58 for (int i = 0; i < n_columns; i++) {
59 stdout.printf ("%s = %s\n", column_names[i], values[i]);
66 public int add_movie (string title, int year) {
67 string sql = "INSERT INTO Movies(Title, Year) VALUES (\"%s\", %d);".printf (title, year);
70 rc = db.exec (sql, callback, null);
71 if (rc != Sqlite.OK) {
72 stderr.printf ("Failed to insert movie \"%s\" (%d): %d, %s\n", title, year, rc, db.errmsg ());
79 public int movie_set_rating (string title, int rating, int votes) {
80 var sql = "UPDATE Movies SET Rating=%d, Votes=%d WHERE Title=\"%s\";".printf (rating, votes, title);
83 rc = db.exec (sql, callback, null);
84 if (rc != Sqlite.OK) {
85 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
92 public int movie_add_genre (string title, string genre) {
97 bit = genre_bit (genre);
99 genres.append (genre);
100 bit = genre_bit (genre);
102 sql = "INSERT INTO Genres(Bit, Genre) VALUES (%d, \"%s\");".printf (bit, genre);
104 rc = db.exec (sql, callback, null);
105 if (rc != Sqlite.OK) {
106 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
111 sql = "UPDATE Movies SET Genres=Genres|%d WHERE Title=\"%s\";".printf (bit, title);
112 rc = db.exec (sql, callback, null);
113 if (rc != Sqlite.OK) {
114 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
121 int genre_bit (string genre) {
122 for (int i = 0; i < genres.length (); i++) {
123 if (genres.nth_data (i) == genre)
129 public int clear () {
133 "DROP TABLE IF EXISTS Movies;" +
134 "CREATE TABLE Movies (Title TEXT PRIMARY KEY COLLATE NOCASE, Year INTEGER, Rating INTEGER, Votes INTEGER NOT NULL DEFAULT 0, Genres INTEGER NOT NULL DEFAULT 0);" +
135 "DROP TABLE IF EXISTS Genres;" +
136 "CREATE TABLE Genres (Bit INTEGER PRIMARY KEY, Genre TEXT NOT NULL);",
138 if (rc != Sqlite.OK) {
139 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
146 public int create_votes_index () {
149 rc = db.exec ("CREATE INDEX MovieVotes ON Movies(Votes);", callback, null);
150 if (rc != Sqlite.OK) {
151 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
158 private Cancellable? _cancellable;
159 public async int query (MovieFilter filter, ReceiveMovieFunction receive_movie, int limit, Cancellable? cancellable) {
160 var sql = "SELECT Title, Year, Rating, Genres FROM Movies";
165 // FIXME - how many opcodes until main loop iteration for best responsivity?
166 _cancellable = cancellable;
167 db.progress_handler (1000, progress_handler);
169 if (filter.title != null && filter.title != "") {
170 if ("*" in filter.title)
171 sql += sep + "Title GLOB \"%s (*)\"".printf (filter.title);
173 sql += sep + "Title LIKE \"%s%%\"".printf (filter.title);
176 if (filter.year_min > 0) {
177 sql += sep + "Year >= %d".printf (filter.year_min);
180 if (filter.year_max > 0) {
181 sql += sep + "Year <= %d".printf (filter.year_max);
184 if (filter.rating_min > 0) {
185 sql += sep + "Rating >= %d".printf (filter.rating_min);
188 if (filter.genres.field != 0) {
189 sql += sep + "Genres&%d = %d".printf (filter.genres.field, filter.genres.field);
191 sql += " ORDER BY Votes DESC LIMIT %d;".printf (limit);
193 stdout.printf("SQL: \"%s\"\n", sql);
195 rc = db.prepare_v2 (sql, -1, out stmt);
196 if (rc != Sqlite.OK) {
197 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
198 db.progress_handler (0, null);
203 Idle.add (query.callback);
206 if (rc == Sqlite.ROW) {
207 int year = stmt.column_int (1);
208 string title = stmt.column_text (0);
209 int rating = stmt.column_int (2);
210 int genres = stmt.column_int (3);
211 receive_movie (strip_year (title, year), year, rating, genres);
213 } while (rc == Sqlite.ROW);
215 db.progress_handler (0, null);
219 private int progress_handler () {
220 ((MainContext) null).iteration (false);
221 return (int) _cancellable.is_cancelled ();
224 private string strip_year (string title, int year) {
225 string year_suffix = " (%d)".printf (year);
226 if (title.has_suffix (year_suffix))
227 return title.substring (0, title.length - year_suffix.length);
228 year_suffix = " (%d/I)".printf (year);
229 if (title.has_suffix (year_suffix))
230 return title.substring (0, title.length - year_suffix.length);
231 year_suffix = " (%d/II)".printf (year);
232 if (title.has_suffix (year_suffix))
233 return title.substring (0, title.length - year_suffix.length);