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 () {
132 rc = db.exec ("DROP TABLE IF EXISTS Movies; CREATE TABLE Movies (Title TEXT NOT NULL, Year INTEGER, Rating INTEGER, Votes INTEGER, Genres INTEGER NOT NULL DEFAULT 0); DROP TABLE IF EXISTS Genres; CREATE TABLE Genres (Bit INTEGER PRIMARY KEY, Genre TEXT NOT NULL);", callback, null);
133 if (rc != Sqlite.OK) {
134 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
141 public int create_title_index () {
144 rc = db.exec ("CREATE INDEX MovieTitles ON Movies(Title);", callback, null);
145 if (rc != Sqlite.OK) {
146 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
153 public int create_votes_index () {
156 rc = db.exec ("CREATE INDEX MovieVotes ON Movies(Votes);", callback, null);
157 if (rc != Sqlite.OK) {
158 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
165 private Cancellable? _cancellable;
166 public async int query (MovieFilter filter, ReceiveMovieFunction receive_movie, int limit, Cancellable? cancellable) {
167 var sql = "SELECT Title, Year, Rating, Genres FROM Movies";
172 // FIXME - how many opcodes until main loop iteration for best responsivity?
173 _cancellable = cancellable;
174 db.progress_handler (1000, progress_handler);
176 if (filter.title != null && filter.title != "") {
177 if ("*" in filter.title)
178 sql += sep + "Title GLOB \"%s (*)\"".printf (filter.title);
180 sql += sep + "Title LIKE \"%s%%\"".printf (filter.title);
183 if (filter.year_min > 0) {
184 sql += sep + "Year >= %d".printf (filter.year_min);
187 if (filter.year_max > 0) {
188 sql += sep + "Year <= %d".printf (filter.year_max);
191 if (filter.rating_min > 0) {
192 sql += sep + "Rating >= %d".printf (filter.rating_min);
195 if (filter.genres.field != 0) {
196 sql += sep + "Genres&%d = %d".printf (filter.genres.field, filter.genres.field);
198 sql += " ORDER BY Votes DESC LIMIT %d;".printf (limit);
200 stdout.printf("SQL: \"%s\"\n", sql);
202 rc = db.prepare_v2 (sql, -1, out stmt);
203 if (rc != Sqlite.OK) {
204 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
205 db.progress_handler (0, null);
210 Idle.add (query.callback);
213 if (rc == Sqlite.ROW) {
214 int year = stmt.column_int (1);
215 string title = stmt.column_text (0);
216 int rating = stmt.column_int (2);
217 int genres = stmt.column_int (3);
218 receive_movie (strip_year (title, year), year, rating, genres);
220 } while (rc == Sqlite.ROW);
222 db.progress_handler (0, null);
226 private int progress_handler () {
227 ((MainContext) null).iteration (false);
228 return (int) _cancellable.is_cancelled ();
231 private string strip_year (string title, int year) {
232 string year_suffix = " (%d)".printf (year);
233 if (title.has_suffix (year_suffix))
234 return title.substring (0, title.length - year_suffix.length);
235 year_suffix = " (%d/I)".printf (year);
236 if (title.has_suffix (year_suffix))
237 return title.substring (0, title.length - year_suffix.length);
238 year_suffix = " (%d/II)".printf (year);
239 if (title.has_suffix (year_suffix))
240 return title.substring (0, title.length - year_suffix.length);