FEATURE: on mobile take users to full page search

UX: improve styling on full page search page
FEATURE: allow search context in full page search
FEATURE: visited color link for full page search
FIX: broken search help on fulls page search page
FEATURE: allow preload store to return a null
FEATURE: "mobileAction" for the header buttons

app/controllers/search_controller.rb

@@ -9,7 +9,20 @@ class SearchController < ApplicationController
   end
 
   def show
-    search = Search.new(params[:q], type_filter: 'topic', guardian: guardian, include_blurbs: true, blurb_length: 300)
+    search_args = {
+      type_filter: 'topic',
+      guardian: guardian,
+      include_blurbs: true,
+      blurb_length: 300
+    }
+
+    context, type = lookup_search_context
+    if context
+      search_args[:search_context] = context
+      search_args[:type_filter] = type if type
+    end
+
+    search = Search.new(params[:q], search_args)
     result = search.execute
 
     serializer = serialize_data(result, GroupedSearchResultSerializer, result: result)
@@ -34,7 +47,29 @@ class SearchController < ApplicationController
     search_args[:include_blurbs] = params[:include_blurbs] == "true" if params[:include_blurbs].present?
     search_args[:search_for_id] = true                               if params[:search_for_id].present?
 
+    context,type = lookup_search_context
+    if context
+      search_args[:search_context] = context
+      search_args[:type_filter] = type if type
+    end
+
+    search = Search.new(params[:term], search_args.symbolize_keys)
+    result = search.execute
+    render_serialized(result, GroupedSearchResultSerializer, result: result)
+  end
+
+  protected
+
+  def lookup_search_context
+
+    return if params[:skip_context] == "true"
+
     search_context = params[:search_context]
+    unless search_context
+      if (context = params[:context]) && (id = params[:context_id])
+        search_context = {type: context, id: id}
+      end
+    end
 
     if search_context.present?
       raise Discourse::InvalidParameters.new(:search_context) unless SearchController.valid_context_types.include?(search_context[:type])
@@ -43,23 +78,21 @@ class SearchController < ApplicationController
       # A user is found by username
       context_obj = nil
       if ['user','private_messages'].include? search_context[:type]
-        context_obj = User.find_by(username_lower: params[:search_context][:id].downcase)
+        context_obj = User.find_by(username_lower: search_context[:id].downcase)
       else
         klass = search_context[:type].classify.constantize
-        context_obj = klass.find_by(id: params[:search_context][:id])
+        context_obj = klass.find_by(id: search_context[:id])
       end
 
+      type_filter = nil
       if search_context[:type] == 'private_messages'
-        search_args[:type_filter] = 'private_messages'
+        type_filter = 'private_messages'
       end
 
       guardian.ensure_can_see!(context_obj)
-      search_args[:search_context] = context_obj
-    end
 
-    search = Search.new(params[:term], search_args.symbolize_keys)
-    result = search.execute
-    render_serialized(result, GroupedSearchResultSerializer, result: result)
+      [context_obj, type_filter]
+    end
   end
 
 end