1/******************************************************************************
2 * $Id: BlocklistScheduler.m 13492 2012-09-10 02:37:29Z livings124 $
3 *
4 * Copyright (c) 2008-2012 Transmission authors and contributors
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *****************************************************************************/
24
25#import "BlocklistScheduler.h"
26#import "BlocklistDownloader.h"
27
28//thirty second delay before running after option is changed
29#define SMALL_DELAY 30
30
31//update one week after previous update
32#define FULL_WAIT (60 * 60 * 24 * 7)
33
34@interface BlocklistScheduler (Private)
35
36- (void) runUpdater;
37
38@end
39
40@implementation BlocklistScheduler
41
42BlocklistScheduler * fScheduler = nil;
43+ (BlocklistScheduler *) scheduler
44{
45    if (!fScheduler)
46        fScheduler = [[BlocklistScheduler alloc] init];
47    
48    return fScheduler;
49}
50
51- (void) updateSchedule
52{
53    if ([BlocklistDownloader isRunning])
54        return;
55    
56    [self cancelSchedule];
57    
58    NSString * blocklistURL;
59    if (![[NSUserDefaults standardUserDefaults] boolForKey: @"BlocklistNew"]
60        || !((blocklistURL = [[NSUserDefaults standardUserDefaults] stringForKey: @"BlocklistURL"]) &&
61                ![blocklistURL isEqualToString: @""])
62        || ![[NSUserDefaults standardUserDefaults] boolForKey: @"BlocklistAutoUpdate"])
63        return;
64    
65    NSDate * lastUpdateDate = [[NSUserDefaults standardUserDefaults] objectForKey: @"BlocklistNewLastUpdate"];
66    if (lastUpdateDate)
67        lastUpdateDate = [lastUpdateDate dateByAddingTimeInterval: FULL_WAIT];
68    NSDate * closeDate = [NSDate dateWithTimeIntervalSinceNow: SMALL_DELAY];
69    
70    NSDate * useDate = lastUpdateDate ? [lastUpdateDate laterDate: closeDate] : closeDate;
71    
72    fTimer = [[NSTimer alloc] initWithFireDate: useDate interval: 0 target: self selector: @selector(runUpdater) userInfo: nil repeats: NO];
73    
74    //current run loop usually means a second update won't work
75    NSRunLoop * loop = [NSRunLoop mainRunLoop];
76    [loop addTimer: fTimer forMode: NSDefaultRunLoopMode];
77    [loop addTimer: fTimer forMode: NSModalPanelRunLoopMode];
78    [loop addTimer: fTimer forMode: NSEventTrackingRunLoopMode];
79}
80
81- (void) cancelSchedule
82{
83    [fTimer invalidate];
84    [fTimer release];
85    fTimer = nil;
86}
87
88@end
89
90@implementation BlocklistScheduler (Private)
91
92- (void) runUpdater
93{
94    [fTimer release];
95    fTimer = nil;
96    [BlocklistDownloader downloader];
97}
98
99@end
100