-
Notifications
You must be signed in to change notification settings - Fork 16
/
filemonitor.cpp
287 lines (264 loc) · 14.1 KB
/
filemonitor.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
/** ***************************************************************************
* Description : Class for a single teletext line
* Compiler : C++
*
* Copyright (C) 2014, Peter Kwan
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for any purpose and without fee is hereby
* granted, provided that the above copyright notice appear in all
* copies and that both that the copyright notice and this
* permission notice and warranty disclaimer appear in supporting
* documentation, and that the name of the author not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* The author disclaims all warranties with regard to this
* software, including all implied warranties of merchantability
* and fitness. In no event shall the author be liable for any
* special, indirect or consequential damages or any damages
* whatsoever resulting from loss of use, data or profits, whether
* in an action of contract, negligence or other tortious action,
* arising out of or in connection with the use or performance of
* this software.
*************************************************************************** **/
#include "filemonitor.h"
using namespace vbit;
using namespace ttx;
FileMonitor::FileMonitor(Configure *configure, PageList *pageList) :
_configure(configure),_pageList(pageList)
{
//ctor
}
FileMonitor::FileMonitor()
: _pageList(nullptr)
{
//ctor
}
FileMonitor::~FileMonitor()
{
//dtor
}
/**
std::thread FileMonitor::run()
{
t=new std::thread(&FileMonitor::worker, this); // Start the thread
//t.join(); // Rejoin after the thread terminates
return false;
}
*/
void FileMonitor::run()
{
// @todo This thread will clash. They need proper protection.
std::string path=_configure->GetPageDirectory() ; //
std::cerr << "[FileMonitor::run] Monitoring " << path << std::endl;
while (true)
{
DIR *dp;
struct dirent *dirp;
// Open the directory
if ( (dp = opendir(path.c_str())) == NULL)
{
std::cerr << "Error(" << errno << ") opening " << path << std::endl;
return;
}
_pageList->ClearFlags(); // Assume that no files exist
// Load the filenames into a list
while ((dirp = readdir(dp)) != NULL)
{
// Select only pages that might be teletext. tti or ttix at the moment.
// strcasestr doesn't seem to be in my Windows compiler.
#ifdef _WIN32
char* p=strstr(dirp->d_name,".tti");
#else
char* p=strcasestr(dirp->d_name,".tti");
#endif
// std::cerr << path << "/" << dirp->d_name << std::endl;
if (p)
{
std::string name;
name=path;
name+="/";
name+=dirp->d_name;
// Find the modification time
struct stat attrib; // create a file attribute structure
stat(name.c_str(), &attrib); // get the attributes of the file
// struct tm* clock = gmtime(&(attrib.st_mtime)); // Get the last modified time and put it into the time structure
// std::cerr << path << "/" << dirp->d_name << std::dec << " time:" << std::setw(2) << clock->tm_hour << ":" << std::setw(2) << clock->tm_min << std::endl;
// Now we want to process changes
// 1) Is it a new page? Then add it.
TTXPageStream* q=_pageList->Locate(name);
if (q) // File was found
{
if (!(q->GetStatusFlag()==TTXPageStream::MARKED || q->GetStatusFlag()==TTXPageStream::GONE)) // file is not mid-deletion
{
//std::cerr << dirp->d_name << " was found" << std::endl;
if (attrib.st_mtime!=q->GetModifiedTime()) // File exists. Has it changed?
{
//std::cerr << "[FileMonitor::run] File has been modified " << dirp->d_name << std::endl;
// We just load the new page and update the modified time
// This isn't good enough.
// We need a mutex or semaphore to lock out this page while we do that
// lock
q->LoadPage(name); // What if this fails? We can see the bool. What to do ?
q->IncrementUpdateCount();
q->SetFileChangedFlag();
q->GetPageCount(); // renumber the subpages
int mag=(q->GetPageNumber() >> 16) & 0x7;
if (q->GetSpecialFlag())
{
// Page was 'special'
q->SetSpecialFlag(q->Special());
q->SetCarouselFlag(q->IsCarousel());
if (!(q->Special()))
{
// Page is longer 'special'
// TODO: remove from SpecialPages list
_pageList->GetMagazines()[mag]->GetSpecialPages()->deletePage(q);
if (q->IsCarousel())
{
// Page is a 'carousel', add to Carousel list
_pageList->GetMagazines()[mag]->GetCarousel()->addPage(q);
std::cerr << "[FileMonitor::run] page was special, is now a carousel " << std::hex << q->GetPageNumber() << std::endl;
}
else
{
// Page is 'normal', add to NormalPages list
_pageList->GetMagazines()[mag]->GetNormalPages()->addPage(q);
std::cerr << "[FileMonitor::run] page was special, is now normal " << std::hex << q->GetPageNumber() << std::endl;
}
}
else
{
// no change
//std::cerr << "[FileMonitor::run] page remains special " << std::hex << q->GetPageNumber() << std::endl;
}
}
else if (q->GetCarouselFlag())
{
// Page was 'carousel'
q->SetSpecialFlag(q->Special());
q->SetCarouselFlag(q->IsCarousel());
if (!(q->IsCarousel()) || q->Special())
{
// Page is no longer a 'carousel'
// TODO: remove from Carousel list
_pageList->GetMagazines()[mag]->GetCarousel()->deletePage(q);
if (q->Special())
{
// Page is 'special', add to SpecialPages list
_pageList->GetMagazines()[mag]->GetSpecialPages()->addPage(q);
std::cerr << "[FileMonitor::run] page was carousel, is now special " << std::hex << q->GetPageNumber() << std::endl;
}
else
{
// Page is 'normal', add to NormalPages list
_pageList->GetMagazines()[mag]->GetNormalPages()->addPage(q);
std::cerr << "[FileMonitor::run] page was carousel, is now normal " << std::hex << q->GetPageNumber() << std::endl;
}
}
else
{
// no change
//std::cerr << "[FileMonitor::run] page remains a carousel " << std::hex << q->GetPageNumber() << std::endl;
}
}
else
{
// Page was 'normal'
q->SetSpecialFlag(q->Special());
q->SetCarouselFlag(q->IsCarousel());
if (q->Special() || q->IsCarousel())
{
// Page is no longer 'normal'
// TODO: remove from NormalPages list
_pageList->GetMagazines()[mag]->GetNormalPages()->deletePage(q);
if (q->Special())
{
// Page is 'special', add to SpecialPages list
_pageList->GetMagazines()[mag]->GetSpecialPages()->addPage(q);
std::cerr << "[FileMonitor::run] page was normal, is now special " << std::hex << q->GetPageNumber() << std::endl;
}
else if (q->IsCarousel())
{
// Page is a 'carousel', add to Carousel list
_pageList->GetMagazines()[mag]->GetCarousel()->addPage(q);
std::cerr << "[FileMonitor::run] page was normal, is now a carousel " << std::hex << q->GetPageNumber() << std::endl;
}
}
else
{
// no change
//std::cerr << "[FileMonitor::run] page remains normal " << std::hex << q->GetPageNumber() << std::endl;
}
}
if (_pageList->CheckForPacket29(q))
{
std::cerr << "[FileMonitor::run] found packet 29" << std::endl;
_pageList->GetMagazines()[mag]->SetPacket29(_pageList->GetPacket29(mag));
}
q->SetModifiedTime(attrib.st_mtime);
// unlock
}
q->SetState(TTXPageStream::FOUND); // Mark this page as existing on the drive
}
}
else
{
std::cerr << "[FileMonitor::run] Adding a new page " << dirp->d_name << std::endl;
// A new file. Create the page object and add it to the page list.
if ((q=new TTXPageStream(name)))
{
_pageList->AddPage(q);
if((q=_pageList->Locate(name))) // get pointer to copy in list
{
q->GetPageCount(); // renumber the subpages
int mag=(q->GetPageNumber() >> 16) & 0x7;
if (q->Special())
{
// Page is 'special'
q->SetSpecialFlag(q->Special());
_pageList->GetMagazines()[mag]->GetSpecialPages()->addPage(q);
//std::cerr << "[FileMonitor::run] new page is special " << std::hex << q->GetPageNumber() << std::endl;
}
else if (q->IsCarousel())
{
// Page is a 'carousel'
q->SetCarouselFlag(q->IsCarousel());
_pageList->GetMagazines()[mag]->GetCarousel()->addPage(q);
//std::cerr << "[FileMonitor::run] new page is a carousel " << std::hex << q->GetPageNumber() << std::endl;
}
else
{
// Page is 'normal'
_pageList->GetMagazines()[mag]->GetNormalPages()->addPage(q);
//std::cerr << "[FileMonitor::run] new page is normal " << std::hex << q->GetPageNumber() << std::endl;
}
if (_pageList->CheckForPacket29(q))
{
std::cerr << "[FileMonitor::run] found packet 29" << std::endl;
_pageList->GetMagazines()[mag]->SetPacket29(_pageList->GetPacket29(mag));
}
}
else
std::cerr << "[FileMonitor::run] Failed to add" << dirp->d_name << std::endl; // should never happen
}
else
std::cerr << "[FileMonitor::run] Failed to load" << dirp->d_name << std::endl;
}
}
}
closedir(dp);
// std::cerr << "[FileMonitor::run] Finished scan" << std::endl;
// Delete pages that no longer exist (this blocks the thread until the pages are removed)
_pageList->DeleteOldPages();
// Wait 5 seconds to avoid hogging cpu
// Sounds like a job for a mutex.
struct timespec rec;
int ms;
ms=5000;
rec.tv_sec = ms / 1000;
rec.tv_nsec=(ms % 1000) *1000000;
nanosleep(&rec,nullptr);
}
} // run