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