new option - ALLOW_DUPLICATE_POSTS

functions.php

@@ -52,6 +52,10 @@
 			}
 		}	
 
+		// purge orphaned posts in main content table
+		db_query($link, "DELETE FROM ttrss_entries WHERE 
+			(SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
+
 	}
 
 	function purge_old_posts($link) {
@@ -72,6 +76,10 @@
 				purge_feed($link, $feed_id, $purge_interval);
 			}
 		}	
+
+		// purge orphaned posts in main content table
+		db_query($link, "DELETE FROM ttrss_entries WHERE 
+			(SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
 	}
 
 	function update_all_feeds($link, $fetch) {
@@ -315,20 +323,24 @@
 
 						// check for user post link to main table
 
+						// do we allow duplicate posts with same GUID in different feeds?
+						if (get_pref($link, "ALLOW_DUPLICATE_POSTS")) {
+							$dupcheck_qpart = "AND feed_id = '$feed'";
+						} else { 
+							$dupcheck_qpart = "";
+						}
+
 						$result = db_query($link,
 							"SELECT ref_id FROM ttrss_user_entries WHERE
-								ref_id = '$ref_id' AND owner_uid = '$owner_uid' AND 
-								feed_id = '$feed'");
+								ref_id = '$ref_id' AND owner_uid = '$owner_uid'
+								$dupcheck_qpart");
 
 						// okay it doesn't exist - create user entry
-
 						if (db_num_rows($result) == 0) {
-
 							$result = db_query($link,
 								"INSERT INTO ttrss_user_entries 
 									(ref_id, owner_uid, feed_id) 
 								VALUES ('$ref_id', '$owner_uid', '$feed')");
-
 						}
 				}
 

schema/ttrss_schema_mysql.sql

@@ -169,6 +169,10 @@ insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id,help_
 
 insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) values('ENABLE_SPLASH', 1, 'false', 'Enable loading splashscreen',2);
 
+insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id,help_text) values('ALLOW_DUPLICATE_POSTS', 1, 'true', 'Allow duplicate posts',1,
+	'This option is useful when you are reading several planet-type aggregators with partially colliding userbase. 
+	When disabled, it forces same posts from different sources to appear only once');
+
 create table ttrss_user_prefs (
    owner_uid integer not null,
    pref_name varchar(250),

schema/ttrss_schema_pgsql.sql

@@ -160,6 +160,10 @@ insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id,help_
 
 insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id) values('ENABLE_SPLASH', 1, 'false', 'Enable loading splashscreen',2);
 
+insert into ttrss_prefs (pref_name,type_id,def_value,short_desc,section_id,help_text) values('ALLOW_DUPLICATE_POSTS', 1, 'true', 'Allow duplicate posts',1,
+	'This option is useful when you are reading several planet-type aggregators with partially colliding userbase. 
+	When disabled, it forces same posts from different sources to appear only once');
+
 create table ttrss_user_prefs (
 	owner_uid integer not null references ttrss_users(id) on delete cascade,
 	pref_name varchar(250) not null references ttrss_prefs(pref_name),