add exclude tags to advanced search

cps/templates/search_form.html

@@ -10,12 +10,22 @@
       <label for="bookAuthor">Author</label>
       <input type="text" class="form-control typeahead" name="author_name" id="bookAuthor" value="" autocomplete="off">
     </div>
-    <label for="Tags">Select Tags</label>
+    <label for="Tags">Include Tags</label>
     <div class="form-group">
       <div class="btn-toolbar btn-toolbar-lg" data-toggle="buttons">
         {% for tag in tags %}
-          <label id="tag_{{tag.id}}" class="btn btn-primary tag_click">
-            <input type="checkbox" autocomplete="off" name="tag" value="{{tag.id}}">{{tag.name}}</input>
+          <label id="tag_{{tag.id}}" class="btn btn-primary tags_click">
+            <input type="checkbox" autocomplete="off" name="include_tag" value="{{tag.id}}">{{tag.name}}</input>
+          </label>
+        {% endfor %}
+      </div>
+    </div>
+    <label for="Tags">Exclude Tags</label>
+    <div class="form-group">
+      <div class="btn-toolbar btn-toolbar-lg" data-toggle="buttons">
+        {% for tag in tags %}
+          <label id="tag_{{tag.id}}" class="btn btn-danger tags_click">
+            <input type="checkbox" autocomplete="off" name="exclude_tag" value="{{tag.id}}">{{tag.name}}</input>
           </label>
         {% endfor %}
       </div>
@@ -32,10 +42,12 @@
   $('form').on('change input typeahead:selected', function() {
     form = $('form').serialize();
     $.getJSON( "{{ url_for('get_matching_tags') }}", form, function( data ) {
-      $('.tag_click').each(function() {
+      $('.tags_click').each(function() {
         if ($.inArray(parseInt($(this).children('input').first().val(), 10), data.tags) == -1 ) {
+          if (!($(this).hasClass('active'))) {
             $(this).addClass('disabled');
           }
+        }
         else {
           $(this).removeClass('disabled');
         }

cps/web.py

@@ -327,11 +327,15 @@ def get_matching_tags():
         q = db.session.query(db.Books)
         author_input = request.args.get('author_name')
         title_input = request.args.get('book_title')
-        tag_inputs = request.args.getlist('tag')
+        include_tag_inputs = request.args.getlist('include_tag')
+        exclude_tag_inputs = request.args.getlist('exclude_tag')
         q = q.filter(db.Books.authors.any(db.Authors.name.like("%" +  author_input + "%")), db.Books.title.like("%"+title_input+"%"))
-        if len(tag_inputs) > 0:
-            for tag in tag_inputs:
+        if len(include_tag_inputs) > 0:
+            for tag in include_tag_inputs:
                 q = q.filter(db.Books.tags.any(db.Tags.id == tag))
+        if len(exclude_tag_inputs) > 0:
+            for tag in exclude_tag_inputs:
+                q = q.filter(not_(db.Books.tags.any(db.Tags.id == tag)))
         for book in q:
             for tag in book.tags:
                 if tag.id not in tag_dict['tags']:
@@ -447,19 +451,22 @@ def search():
 def advanced_search():
     if request.method == 'GET':
         q = db.session.query(db.Books)
-        tag_inputs = request.args.getlist('tag')
+        include_tag_inputs = request.args.getlist('include_tag')
+        exclude_tag_inputs = request.args.getlist('exclude_tag')
         author_name = request.args.get("author_name")
         book_title = request.args.get("book_title")
-        if tag_inputs or author_name or book_title:
+        if include_tag_inputs or exclude_tag_inputs or author_name or book_title:
             searchterm = []
             searchterm.extend((author_name, book_title))
-            tag_names = db.session.query(db.Tags).filter(db.Tags.id.in_(tag_inputs)).all()
+            tag_names = db.session.query(db.Tags).filter(db.Tags.id.in_(include_tag_inputs)).all()
             searchterm.extend(tag.name for tag in tag_names)
             searchterm = " + ".join(filter(None, searchterm))
             q = q.filter(db.Books.authors.any(db.Authors.name.like("%" +  author_name + "%")), db.Books.title.like("%"+book_title+"%"))
             random = db.session.query(db.Books).order_by(func.random()).limit(config.RANDOM_BOOKS)
-            for tag in tag_inputs:
+            for tag in include_tag_inputs:
                 q = q.filter(db.Books.tags.any(db.Tags.id == tag))
+            for tag in exclude_tag_inputs:
+                q = q.filter(not_(db.Books.tags.any(db.Tags.id == tag)))
             q = q.all()
             return render_template('search.html', searchterm=searchterm, entries=q)
     tags = db.session.query(db.Tags).order_by(db.Tags.name).all()