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
|
package de.podfetcher.feed;
import java.util.ArrayList;
import de.podfetcher.storage.*;
import android.content.Context;
import android.database.Cursor;
import android.util.Log;
/**
* Singleton class
* Manages all feeds, categories and feeditems
*
*
* */
public class FeedManager {
private static final String TAG = "FeedManager";
private static FeedManager singleton;
private ArrayList<Feed> feeds;
private ArrayList<FeedCategory> categories;
private DownloadRequester requester;
private FeedManager() {
feeds = new ArrayList<Feed>();
categories = new ArrayList<FeedCategory>();
requester = DownloadRequester.getInstance();
}
public static FeedManager getInstance(){
if(singleton == null) {
singleton = new FeedManager();
}
return singleton;
}
public void refreshAllFeeds(Context context) {
Log.d(TAG, "Refreshing all feeds.");
for(Feed feed : feeds) {
requester.downloadFeed(context, feed);
}
}
private void addNewFeed(Context context, Feed feed) {
feeds.add(feed);
feed.setId(setFeed(context, feed));
for(FeedItem item : feed.getItems()) {
setFeedItem(context, item);
}
}
/** Adds a new Feeditem if its not in the list */
public void addFeedItem(Context context, FeedItem item) {
PodDBAdapter adapter = new PodDBAdapter(context);
// Search list for feeditem
Feed feed = item.getFeed();
FeedItem foundItem = searchFeedItemByLink(feed, item.getLink());
if(foundItem != null) {
// Update Information
item.id = foundItem.id;
foundItem = item;
item.setRead(foundItem.isRead());
adapter.setFeedItem(item);
} else {
feed.getItems().add(item);
item.id = adapter.setFeedItem(item);
}
}
public void updateFeed(Context context, Feed newFeed) {
// Look up feed in the feedslist
Feed savedFeed = searchFeedByLink(newFeed.getLink());
if(savedFeed == null) {
Log.d(TAG, "Found no existing Feed with title " + newFeed.getTitle() + ". Adding as new one.");
// Add a new Feed
addNewFeed(context, newFeed);
}else {
Log.d(TAG, "Feed with title " + newFeed.getTitle() + " already exists. Syncing new with existing one.");
// Look for new or updated Items
for(FeedItem item : newFeed.getItems()) {
FeedItem oldItem = searchFeedItemByLink(savedFeed, item.getLink());
if(oldItem != null) {
FeedItem newItem = searchFeedItemByLink(newFeed, item.getLink());
if(newItem != null) {
newItem.setRead(oldItem.isRead());
}
}
}
newFeed.setId(savedFeed.getId());
savedFeed = newFeed;
setFeed(context, newFeed);
}
}
/** Get a Feed by its link */
private Feed searchFeedByLink(String link) {
for(Feed feed : feeds) {
if(feed.getLink().equals(link)) {
return feed;
}
}
return null;
}
/** Get a FeedItem by its link */
private FeedItem searchFeedItemByLink(Feed feed, String link) {
for(FeedItem item : feed.getItems()) {
if(item.getLink().equals(link)) {
return item;
}
}
return null;
}
/** Updates Information of an existing Feed */
public long setFeed(Context context, Feed feed) {
PodDBAdapter adapter = new PodDBAdapter(context);
return adapter.setFeed(feed);
}
public long setFeedItem(Context context, FeedItem item) {
PodDBAdapter adapter = new PodDBAdapter(context);
return adapter.setFeedItem(item);
}
/** Updates information of an existing FeedImage */
public long setFeedImage(Context context, FeedImage image) {
PodDBAdapter adapter = new PodDBAdapter(context);
return adapter.setImage(image);
}
/** Get a Feed by its id */
public Feed getFeed(long id) {
for(Feed f : feeds) {
if(f.id == id) {
return f;
}
}
return null;
}
/** Get a Feed Image by its id */
public FeedImage getFeedImage(long id) {
for(Feed f : feeds) {
FeedImage image = f.getImage();
if(image != null && image.getId() == id) {
return image;
}
}
return null;
}
/** Get a Feed Item by its id and its feed*/
public FeedItem getFeedItem(long id, Feed feed) {
for(FeedItem item : feed.getItems()) {
if(item.getId() == id) {
return item;
}
}
Log.w(TAG, "Couldn't find FeedItem with id " + id);
return null;
}
/** Reads the database */
public void loadDBData(Context context) {
PodDBAdapter adapter = new PodDBAdapter(context);
updateArrays(context);
}
public void updateArrays(Context context) {
feeds.clear();
categories.clear();
extractFeedlistFromCursor(context);
}
private void extractFeedlistFromCursor(Context context) {
PodDBAdapter adapter = new PodDBAdapter(context);
adapter.open();
Cursor feedlistCursor = adapter.getAllFeedsCursor();
if(feedlistCursor.moveToFirst()) {
do {
Feed feed = new Feed();
feed.id = feedlistCursor.getLong(feedlistCursor.getColumnIndex(PodDBAdapter.KEY_ID));
feed.setTitle(feedlistCursor.getString(feedlistCursor.getColumnIndex(PodDBAdapter.KEY_TITLE)));
feed.setLink(feedlistCursor.getString(feedlistCursor.getColumnIndex(PodDBAdapter.KEY_LINK)));
feed.setDescription(feedlistCursor.getString(feedlistCursor.getColumnIndex(PodDBAdapter.KEY_DESCRIPTION)));
feed.setImage(adapter.getFeedImage(feedlistCursor.getLong(feedlistCursor.getColumnIndex(PodDBAdapter.KEY_IMAGE))));
feed.file_url = feedlistCursor.getString(feedlistCursor.getColumnIndex(PodDBAdapter.KEY_FILE_URL));
feed.download_url = feedlistCursor.getString(feedlistCursor.getColumnIndex(PodDBAdapter.KEY_DOWNLOAD_URL));
// Get FeedItem-Object
Cursor itemlistCursor = adapter.getAllItemsOfFeedCursor(feed);
feed.setItems(extractFeedItemsFromCursor(context, itemlistCursor));
feeds.add(feed);
}while(feedlistCursor.moveToNext());
}
adapter.close();
}
private ArrayList<FeedItem> extractFeedItemsFromCursor(Context context, Cursor itemlistCursor) {
ArrayList<FeedItem> items = new ArrayList<FeedItem>();
PodDBAdapter adapter = new PodDBAdapter(context);
adapter.open();
if(itemlistCursor.moveToFirst()) {
do {
FeedItem item = new FeedItem();
item.id = itemlistCursor.getLong(itemlistCursor.getColumnIndex(PodDBAdapter.KEY_ID));
item.setTitle(itemlistCursor.getString(itemlistCursor.getColumnIndex(PodDBAdapter.KEY_TITLE)));
item.setLink(itemlistCursor.getString(itemlistCursor.getColumnIndex(PodDBAdapter.KEY_LINK)));
item.setDescription(itemlistCursor.getString(itemlistCursor.getColumnIndex(PodDBAdapter.KEY_DESCRIPTION)));
item.setPubDate(itemlistCursor.getString(itemlistCursor.getColumnIndex(PodDBAdapter.KEY_PUBDATE)));
item.setMedia(adapter.getFeedMedia(itemlistCursor.getLong(itemlistCursor.getColumnIndex(PodDBAdapter.KEY_MEDIA))));
item.setRead((itemlistCursor.getInt(itemlistCursor.getColumnIndex(PodDBAdapter.KEY_READ)) > 0) ? true : false);
items.add(item);
} while(itemlistCursor.moveToNext());
}
adapter.close();
return items;
}
public ArrayList<Feed> getFeeds() {
return feeds;
}
}
|
