filter by tag and domain when searching for comments

Gemfile

@@ -47,4 +47,5 @@ group :test, :development do
   gem "sqlite3"
   gem "faker"
   gem "byebug"
+  gem "rb-readline"
 end

Gemfile.lock

@@ -153,6 +153,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
+    rb-readline (0.5.5)
     rotp (3.3.1)
     rqrcode (0.10.1)
       chunky_png (~> 1.0)
@@ -241,6 +242,7 @@ DEPENDENCIES
   nokogiri (>= 1.7.2)
   oauth
   rails (~> 5.2.0)
+  rb-readline
   rotp
   rqrcode
   rspec-rails

app/models/search.rb

@@ -61,6 +61,23 @@ class Search
       .group("stories.id")
   end
 
+  def with_stories_in_domain(base, domain)
+    begin
+      reg = Regexp.new("//([^/]*\.)?#{domain}/")
+      base.where("`stories`.`url` REGEXP '" +
+        ActiveRecord::Base.connection.quote_string(reg.source) + "'")
+    rescue RegexpError
+      return base
+    end
+  end
+
+  def with_stories_matching_tags(base, tag_scopes)
+    story_ids_matching_tags = with_tags(
+      Story.unmerged.where(:is_expired => false), tag_scopes
+    ).select(:id).map(&:id)
+    base.where(story_id: story_ids_matching_tags)
+  end
+
   def search_for_user!(user)
     self.results = []
     self.total_results = 0
@@ -84,13 +101,7 @@ class Search
     when "stories"
       base = Story.unmerged.where(:is_expired => false)
       if domain.present?
-        begin
-          reg = Regexp.new("//([^/]*\.)?#{domain}/")
-          base = base.where("`url` REGEXP '" +
-            ActiveRecord::Base.connection.quote_string(reg.source) + "'")
-        rescue RegexpError
-          return false
-        end
+        base = with_stories_in_domain(base, domain)
       end
 
       title_match_sql = Arel.sql("MATCH(stories.title) AGAINST('#{qwords}' IN BOOLEAN MODE)")
@@ -138,17 +149,20 @@ class Search
       end
 
     when "comments"
-      base = Comment.active.where(Arel.sql("MATCH(comment) AGAINST('#{qwords}' IN BOOLEAN MODE)"))
-        .includes(:user, :story)
-
+      base = Comment.active
+      if domain.present?
+        base = with_stories_in_domain(base.joins(:story), domain)
+      end
+      if tag_scopes.present?
+        base = with_stories_matching_tags(base, tag_scopes)
+      end
+      if qwords.present?
+        base = base.where(Arel.sql("MATCH(comment) AGAINST('#{qwords}' IN BOOLEAN MODE)"))
+      end
       self.results = base.select(
         "comments.*, " +
         "MATCH(comment) AGAINST('#{qwords}' IN BOOLEAN MODE) AS rel_comment"
-      )
-
-      if tag_scopes.present?
-        self.results = with_tags(base, tag_scopes)
-      end
+      ).includes(:user, :story)
 
       case self.order
       when "relevance"
@@ -158,12 +172,8 @@ class Search
       when "points"
         self.results.order!("#{Comment.score_sql} DESC")
       end
-    end
 
-    if tag_scopes.present?
       self.total_results = self.results.length
-    else
-      self.total_results = base.count
     end
 
     if self.page > self.page_count

spec/models/search_spec.rb

@@ -31,11 +31,29 @@ describe Search do
                   :user_id => @user.id,
                   :tags_a => ["tag1"]),
     ]
+    @comments = [
+      create(:comment, :comment => "comment0",
+                    :story_id => @multi_tag.id,
+                    :user_id => @user.id),
+      create(:comment, :comment => "comment1",
+                    :story_id => @stories[0].id,
+                    :user_id => @user.id),
+      create(:comment, :comment => "comment2",
+                    :story_id => @stories[1].id,
+                    :user_id => @user.id),
+      create(:comment, :comment => "comment3",
+                    :story_id => @stories[2].id,
+                    :user_id => @user.id),
+      create(:comment, :comment => "comment4",
+                    :story_id => @stories[4].id,
+                    :user_id => @user.id),
+    ]
   end
 
   after(:all) do
-    @user.destroy!
+    @comments.each(&:destroy!)
     @stories.each(&:destroy!)
+    @user.destroy! if @user
   end
 
   it "can search for stories" do
@@ -103,4 +121,54 @@ describe Search do
 
     expect(search.results.length).to eq(2)
   end
+
+  it "can search for comments" do
+    search = Search.new
+    search.q = "comment1"
+    search.what = "comments"
+
+    search.search_for_user!(@user)
+
+    expect(search.results).to include(@comments[1])
+  end
+  it "can search for comments by tag" do
+    search = Search.new
+    search.q = "comment2 comment3 tag:tag1"
+    search.what = "comments"
+
+    search.search_for_user!(@user)
+
+    expect(search.results).to include(@comments[2])
+    expect(search.results).not_to include(@comments[3])
+  end
+  it "can search for comments with only tags" do
+    search = Search.new
+    search.q = "tag:tag1"
+    search.what = "comments"
+
+    search.search_for_user!(@user)
+
+    expect(search.results).to include(@comments[2])
+    expect(search.results).not_to include(@comments[3])
+  end
+  it "should only return comments matching all tags if multiple are present" do
+    search = Search.new
+    search.q = "tag:tag1 tag:tag2"
+    search.what = "comments"
+
+    search.search_for_user!(@user)
+
+    expect(search.results).to eq([@comments[0]])
+  end
+
+  it "should only return comments with stories in domain if domain present" do
+    search = Search.new
+    search.q = "comment3 comment4 domain:lobste.rs"
+    search.what = "comments"
+
+    search.search_for_user!(@user)
+
+    expect(search.results).to include(@comments[4])
+    expect(search.results).not_to include(@comments[3])
+  end
 end