From e3e0a594da21a2220fd965ec933def2611fc924d Mon Sep 17 00:00:00 2001
From: Adam Siemion <adam.siemion+github@gmail.com>
Date: Sat, 1 Jun 2013 14:05:44 +0200
Subject: [PATCH] user can define ignored tags by prefxing them with them a
 minus; questions with any of these tags are ignored

---
 source/NewtMenulet.m | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/source/NewtMenulet.m b/source/NewtMenulet.m
index 27eac8c..01a46bf 100644
--- a/source/NewtMenulet.m
+++ b/source/NewtMenulet.m
@@ -352,11 +352,27 @@ - (void)processNewQuestions:(NSDictionary *)data
   NSDictionary *site = [persistence siteForKey:siteKey];
   NSString *userId = [site objectForKey:@"user_id"];
   
-  NSArray *interestingTagsArray = [site objectForKey:@"favourite_tags"];
+  NSArray *tagsArray = [site objectForKey:@"favourite_tags"];
   NSSet *interestingTags = nil;
-  if (interestingTagsArray != nil && [interestingTagsArray count] > 0) {
-    interestingTags = [NSSet setWithArray:interestingTagsArray];
-  }
+  NSSet *ignoredTags = nil;
+  if (tagsArray != nil && [tagsArray count] > 0) {
+    NSMutableArray *interestingTagsArray = [NSMutableArray arrayWithCapacity:[tagsArray count]];      
+    NSMutableArray *ignoredTagsArray = [NSMutableArray arrayWithCapacity:[tagsArray count]];            
+    for(NSString* tag in tagsArray) {
+      if([tag hasPrefix:@"-"]) {
+        [ignoredTagsArray addObject:[tag substringFromIndex:1]];
+      } else {
+        [interestingTagsArray addObject:tag];
+      }
+    }
+      
+    if([interestingTagsArray count] > 0) {
+      interestingTags = [NSSet setWithArray:interestingTagsArray];
+    }
+    if([ignoredTagsArray count] > 0) {
+      ignoredTags = [NSSet setWithArray:ignoredTagsArray];
+    }
+  }    
   
   for (NSDictionary *question in questions) {
     NSArray *tags = [question objectForKey:@"tags"];
@@ -366,6 +382,11 @@ - (void)processNewQuestions:(NSDictionary *)data
     if (interestingTags != nil && ![interestingTags intersectsSet:[NSSet setWithArray:tags]]) {
       continue;
     }
+      
+    // filter questions by ignored tags
+    if(ignoredTags != nil && [ignoredTags intersectsSet:[NSSet setWithArray:tags]]) {
+      continue;
+    }
     
     // do not display questions asked by a current user
     NSNumber *author = [[question objectForKey:@"owner"] objectForKey:@"user_id"];