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, string? aka, 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 add_aka (string title, string aka) {
132 if (!movie_exists (title, out rowid))
135 string sql = "INSERT INTO Akas(Aka, TitleID) VALUES (\"%s\", %d);".printf (aka, rowid);
137 rc = db.exec (sql, callback, null);
138 if (rc != Sqlite.OK) {
139 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
146 public bool movie_exists (string title, out int rowid = null) {
147 string sql = "SELECT rowid FROM Movies WHERE Title=\"%s\"".printf (title);
152 rc = db.prepare_v2 (sql, -1, out stmt);
153 if (rc != Sqlite.OK) {
154 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
160 if (rc == Sqlite.ROW) {
161 if (&rowid != null) {
162 rowid = stmt.column_int (0);
166 } while (rc == Sqlite.ROW);
171 public int clear () {
175 "DROP TABLE IF EXISTS Movies;" +
176 "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);" +
177 "DROP TABLE IF EXISTS Genres;" +
178 "CREATE TABLE Genres (Bit INTEGER PRIMARY KEY, Genre TEXT NOT NULL);" +
179 "DROP TABLE IF EXISTS Akas;" +
180 "CREATE TABLE Akas (Aka TEXT NOT NULL COLLATE NOCASE, TitleID INTEGER NOT NULL);",
182 if (rc != Sqlite.OK) {
183 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
190 public int create_aka_index () {
193 rc = db.exec ("CREATE INDEX AkasAka ON Akas(Aka);", callback, null);
194 if (rc != Sqlite.OK) {
195 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
202 public int create_votes_index () {
205 rc = db.exec ("CREATE INDEX MovieVotes ON Movies(Votes);", callback, null);
206 if (rc != Sqlite.OK) {
207 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
214 private Cancellable? _cancellable;
215 public async int query (MovieFilter filter, ReceiveMovieFunction receive_movie, int limit, Cancellable? cancellable) {
216 var sql = "SELECT Title, Year, Rating, Genres FROM Movies";
222 // FIXME - how many opcodes until main loop iteration for best responsivity?
223 _cancellable = cancellable;
224 db.progress_handler (1000, progress_handler);
226 if (filter.title != null && filter.title != "") {
227 if ("*" in filter.title) {
228 match = "GLOB \"%s (*)\"".printf (filter.title);
230 match = "LIKE \"%s%%\"".printf (filter.title);
232 sql += sep + "(Title %s OR rowid IN (SELECT TitleID FROM Akas WHERE Aka %s))".printf (match, match);
235 if (filter.year_min > 0) {
236 sql += sep + "Year >= %d".printf (filter.year_min);
239 if (filter.year_max > 0) {
240 sql += sep + "Year <= %d".printf (filter.year_max);
243 if (filter.rating_min > 0) {
244 sql += sep + "Rating >= %d".printf (filter.rating_min);
247 if (filter.genres.field != 0) {
248 sql += sep + "Genres&%d = %d".printf (filter.genres.field, filter.genres.field);
250 sql += " ORDER BY Votes DESC LIMIT %d;".printf (limit);
252 stdout.printf("SQL: \"%s\"\n", sql);
254 rc = db.prepare_v2 (sql, -1, out stmt);
255 if (rc != Sqlite.OK) {
256 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
257 db.progress_handler (0, null);
262 Idle.add (query.callback);
265 if (rc == Sqlite.ROW) {
266 int year = stmt.column_int (1);
267 string title = stmt.column_text (0);
268 int rating = stmt.column_int (2);
269 int genres = stmt.column_int (3);
271 if (match != null && !(filter.matches_title (strip_year (title, year)))) {
272 aka = movie_aka (title, match);
274 aka = strip_year (aka, year);
276 receive_movie (strip_year (title, year), aka, year, rating, genres);
278 } while (rc == Sqlite.ROW);
280 db.progress_handler (0, null);
284 private string movie_aka (string title, string match) {
285 string sql = "SELECT Aka FROM Akas WHERE (TitleID = (SELECT rowid FROM Movies WHERE Title = \"%s\") AND Aka %s) LIMIT 1;".printf (title, match);
290 rc = db.prepare_v2 (sql, -1, out stmt);
291 if (rc != Sqlite.OK) {
292 stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
298 if (rc == Sqlite.ROW) {
299 aka = stmt.column_text (0);
301 } while (rc == Sqlite.ROW);
306 private int progress_handler () {
307 ((MainContext) null).iteration (false);
308 return (int) _cancellable.is_cancelled ();
311 private string strip_year (string title, int year) {
312 string year_suffix = " (%d)".printf (year);
313 if (title.has_suffix (year_suffix))
314 return title.substring (0, title.length - year_suffix.length);
315 year_suffix = " (%d/I)".printf (year);
316 if (title.has_suffix (year_suffix))
317 return title.substring (0, title.length - year_suffix.length);
318 year_suffix = " (%d/II)".printf (year);
319 if (title.has_suffix (year_suffix))
320 return title.substring (0, title.length - year_suffix.length);