ability to filter episodes to include or not when autodownloading

4 files changed, 155 insertions, 2 deletions

diff --git a/core/src/main/java/de/danoeh/antennapod/core/feed/FeedFilter.java b/core/src/main/java/de/danoeh/antennapod/core/feed/FeedFilter.java
new file mode 100644
index 000000000..35abb8de6
--- /dev/null
+++ b/core/src/main/java/de/danoeh/antennapod/core/feed/FeedFilter.java
@@ -0,0 +1,111 @@
+package de.danoeh.antennapod.core.feed;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class FeedFilter {
+
+    private static final String TAG = "FeedFilter";
+
+    private String includeFilter;
+    private String excludeFilter;
+
+    public FeedFilter() {
+        this("", "");
+    }
+
+    public FeedFilter(String includeFilter, String excludeFilter) {
+        // We're storing the strings and not the parsed terms because
+        // 1. It's easier to show the user exactly what they typed in this way
+        //    (we don't have to recreate it)
+        // 2. We don't know if we'll actually be asked to parse anything anyways.
+        this.includeFilter = includeFilter;
+        this.excludeFilter = excludeFilter;
+    }
+
+    /**
+     * Parses the text in to a list of single words or quoted strings.
+     * Example: "One "Two Three"" returns ["One", "Two Three"]
+     * @param filter string to parse in to terms
+     * @return list of terms
+     */
+    private List<String> parseTerms(String filter) {
+        // from http://stackoverflow.com/questions/7804335/split-string-on-spaces-in-java-except-if-between-quotes-i-e-treat-hello-wor
+        List<String> list = new ArrayList<>();
+        Matcher m = Pattern.compile("([^\"]\\S*|\".+?\")\\s*").matcher(filter);
+        while (m.find())
+            list.add(m.group(1).replace("\"", ""));
+        return list;
+    }
+
+    /**
+     * @param item
+     * @return true if the item should be downloaded
+     */
+    public boolean shouldAutoDownload(FeedItem item) {
+
+        List<String> includeTerms = parseTerms(includeFilter);
+        List<String> excludeTerms = parseTerms(excludeFilter);
+
+        if (includeTerms.size() == 0 && excludeTerms.size() == 0) {
+            // nothing has been specified, so include everything
+            return true;
+        }
+
+        // check using lowercase so the users don't have to worry about case.
+        String title = item.getTitle().toLowerCase();
+
+        // if it's explicitly excluded, it shouldn't be autodownloaded
+        // even if it has include terms
+        for (String term : excludeTerms) {
+            if (title.contains(term.trim().toLowerCase())) {
+                return false;
+            }
+        }
+
+        for (String term : includeTerms) {
+            if (title.contains(term.trim().toLowerCase())) {
+                return true;
+            }
+        }
+
+        // now's the tricky bit
+        // if they haven't set an include filter, but they have set an exclude filter
+        // default to including, but if they've set both, then exclude
+        if (!hasIncludeFilter() && hasExcludeFilter()) {
+            return true;
+        }
+
+        return false;
+    }
+
+    public String getIncludeFilter() {
+        return includeFilter;
+    }
+
+    public String getExcludeFilter() { return excludeFilter; }
+
+    /**
+     * @return true if only include is set
+     */
+    public boolean includeOnly() {
+        return hasIncludeFilter() && !hasExcludeFilter();
+    }
+
+    /**
+     * @return true if only exclude is set
+     */
+    public boolean excludeOnly() {
+        return hasExcludeFilter() && !hasIncludeFilter();
+    }
+
+    public boolean hasIncludeFilter() {
+        return includeFilter.length() > 0;
+    }
+
+    public boolean hasExcludeFilter() {
+        return excludeFilter.length() > 0;
+    }
+}
diff --git a/core/src/main/java/de/danoeh/antennapod/core/feed/FeedPreferences.java b/core/src/main/java/de/danoeh/antennapod/core/feed/FeedPreferences.java
index ed568a6e5..9e95d5276 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/feed/FeedPreferences.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/feed/FeedPreferences.java
@@ -2,6 +2,7 @@ package de.danoeh.antennapod.core.feed;
 
 import android.content.Context;
 import android.database.Cursor;
+import android.support.annotation.NonNull;
 import android.text.TextUtils;
 
 import de.danoeh.antennapod.core.preferences.UserPreferences;
@@ -13,8 +14,11 @@ import de.danoeh.antennapod.core.storage.PodDBAdapter;
  */
 public class FeedPreferences {
 
+    @NonNull
+    private FeedFilter filter;
     private long feedID;
     private boolean autoDownload;
+
     public enum AutoDeleteAction {
         GLOBAL,
         YES,
@@ -25,11 +29,16 @@ public class FeedPreferences {
     private String password;
 
     public FeedPreferences(long feedID, boolean autoDownload, AutoDeleteAction auto_delete_action, String username, String password) {
+        this(feedID, autoDownload, auto_delete_action, username, password, new FeedFilter());
+    }
+
+    public FeedPreferences(long feedID, boolean autoDownload, AutoDeleteAction auto_delete_action, String username, String password, @NonNull FeedFilter filter) {
         this.feedID = feedID;
         this.autoDownload = autoDownload;
         this.auto_delete_action = auto_delete_action;
         this.username = username;
         this.password = password;
+        this.filter = filter;
     }
 
     public static FeedPreferences fromCursor(Cursor cursor) {
@@ -38,6 +47,8 @@ public class FeedPreferences {
         int indexAutoDeleteAction = cursor.getColumnIndex(PodDBAdapter.KEY_AUTO_DELETE_ACTION);
         int indexUsername = cursor.getColumnIndex(PodDBAdapter.KEY_USERNAME);
         int indexPassword = cursor.getColumnIndex(PodDBAdapter.KEY_PASSWORD);
+        int indexIncludeFilter = cursor.getColumnIndex(PodDBAdapter.KEY_INCLUDE_FILTER);
+        int indexExcludeFilter = cursor.getColumnIndex(PodDBAdapter.KEY_EXCLUDE_FILTER);
 
         long feedId = cursor.getLong(indexId);
         boolean autoDownload = cursor.getInt(indexAutoDownload) > 0;
@@ -45,10 +56,21 @@ public class FeedPreferences {
         AutoDeleteAction autoDeleteAction = AutoDeleteAction.values()[autoDeleteActionIndex];
         String username = cursor.getString(indexUsername);
         String password = cursor.getString(indexPassword);
-        return new FeedPreferences(feedId, autoDownload, autoDeleteAction, username, password);
+        String includeFilter = cursor.getString(indexIncludeFilter);
+        String excludeFilter = cursor.getString(indexExcludeFilter);
+        return new FeedPreferences(feedId, autoDownload, autoDeleteAction, username, password, new FeedFilter(includeFilter, excludeFilter));
     }
 
+    /**
+     * @return the filter for this feed
+     */
+    public FeedFilter getFilter() {
+        return filter;
+    }
 
+    public void setFilter(@NonNull FeedFilter filter) {
+        this.filter = filter;
+    }
 
     /**
      * Compare another FeedPreferences with this one. The feedID, autoDownload and AutoDeleteAction attribute are excluded from the
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/APDownloadAlgorithm.java b/core/src/main/java/de/danoeh/antennapod/core/storage/APDownloadAlgorithm.java
index 9e21a55f2..26dc027bf 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/APDownloadAlgorithm.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/APDownloadAlgorithm.java
@@ -7,7 +7,9 @@ import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 
+import de.danoeh.antennapod.core.feed.FeedFilter;
 import de.danoeh.antennapod.core.feed.FeedItem;
+import de.danoeh.antennapod.core.feed.FeedPreferences;
 import de.danoeh.antennapod.core.preferences.UserPreferences;
 import de.danoeh.antennapod.core.util.NetworkUtils;
 import de.danoeh.antennapod.core.util.PowerUtils;
@@ -54,7 +56,9 @@ public class APDownloadAlgorithm implements AutomaticDownloadAlgorithm {
                     candidates = new ArrayList<FeedItem>(queue.size() + newItems.size());
                     candidates.addAll(queue);
                     for(FeedItem newItem : newItems) {
-                        if(candidates.contains(newItem) == false) {
+                        FeedPreferences feedPrefs = newItem.getFeed().getPreferences();
+                        FeedFilter feedFilter = feedPrefs.getFilter();
+                        if(candidates.contains(newItem) == false && feedFilter.shouldAutoDownload(newItem)) {
                             candidates.add(newItem);
                         }
                     }
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java b/core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java
index 63b563525..a2f65c7e6 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java
@@ -102,6 +102,8 @@ public class PodDBAdapter {
     public static final String KEY_LAST_UPDATE_FAILED = "last_update_failed";
     public static final String KEY_HAS_EMBEDDED_PICTURE = "has_embedded_picture";
     public static final String KEY_LAST_PLAYED_TIME = "last_played_time";
+    public static final String KEY_INCLUDE_FILTER = "include_filter";
+    public static final String KEY_EXCLUDE_FILTER = "exclude_filter";
 
     // Table names
     public static final String TABLE_NAME_FEEDS = "Feeds";
@@ -128,6 +130,8 @@ public class PodDBAdapter {
             + KEY_FLATTR_STATUS + " INTEGER,"
             + KEY_USERNAME + " TEXT,"
             + KEY_PASSWORD + " TEXT,"
+            + KEY_INCLUDE_FILTER + " TEXT,"
+            + KEY_EXCLUDE_FILTER + " TEXT,"
             + KEY_IS_PAGED + " INTEGER DEFAULT 0,"
             + KEY_NEXT_PAGE_LINK + " TEXT,"
             + KEY_HIDE + " TEXT,"
@@ -238,6 +242,8 @@ public class PodDBAdapter {
             TABLE_NAME_FEEDS + "." + KEY_HIDE,
             TABLE_NAME_FEEDS + "." + KEY_LAST_UPDATE_FAILED,
             TABLE_NAME_FEEDS + "." + KEY_AUTO_DELETE_ACTION,
+            TABLE_NAME_FEEDS + "." + KEY_INCLUDE_FILTER,
+            TABLE_NAME_FEEDS + "." + KEY_EXCLUDE_FILTER
     };
     
     /**
@@ -395,6 +401,8 @@ public class PodDBAdapter {
         values.put(KEY_AUTO_DELETE_ACTION,prefs.getAutoDeleteAction().ordinal());
         values.put(KEY_USERNAME, prefs.getUsername());
         values.put(KEY_PASSWORD, prefs.getPassword());
+        values.put(KEY_INCLUDE_FILTER, prefs.getFilter().getIncludeFilter());
+        values.put(KEY_EXCLUDE_FILTER, prefs.getFilter().getExcludeFilter());
         db.update(TABLE_NAME_FEEDS, values, KEY_ID + "=?", new String[]{String.valueOf(prefs.getFeedID())});
     }
 
@@ -1745,6 +1753,7 @@ public class PodDBAdapter {
                 db.execSQL(PodDBAdapter.CREATE_INDEX_FEEDITEMS_PUBDATE);
                 db.execSQL(PodDBAdapter.CREATE_INDEX_FEEDITEMS_READ);
             }
+
             if (oldVersion < 1050003) {
                 // Migrates feed list filter data
 
@@ -1780,6 +1789,13 @@ public class PodDBAdapter {
 
                 db.setTransactionSuccessful();
                 db.endTransaction();
+
+                // and now get ready for autodownload filters
+                db.execSQL("ALTER TABLE " + PodDBAdapter.TABLE_NAME_FEEDS
+                        + " ADD COLUMN " + PodDBAdapter.KEY_INCLUDE_FILTER + " TEXT DEFAULT ''");
+
+                db.execSQL("ALTER TABLE " + PodDBAdapter.TABLE_NAME_FEEDS
+                        + " ADD COLUMN " + PodDBAdapter.KEY_EXCLUDE_FILTER + " TEXT DEFAULT ''");
             }
 
             EventBus.getDefault().post(ProgressEvent.end());