discourse/lib/topic_query_sql.rb

77 lines
2.4 KiB
Ruby

#
# SQL fragments used when querying a list of topics.
#
module TopicQuerySQL
class << self
# use the constants in conjuction with COALESCE to determine the order with regard to pinned
# topics that have been cleared by the user. There
# might be a cleaner way to do this.
def lowest_date
"2010-01-01"
end
def highest_date
"3000-01-01"
end
# If you've clearned the pin, use bumped_at, otherwise put it at the top
def order_with_pinned_sql
"CASE
WHEN (COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}'))
THEN '#{highest_date}'
ELSE topics.bumped_at
END DESC"
end
def order_hotness(user)
if user
# When logged in take into accounts what pins you've closed
"CASE
WHEN (COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}'))
THEN 100
ELSE hot_topics.score + (COALESCE(categories.hotness, 5.0) / 11.0)
END DESC"
else
# When anonymous, don't use topic_user
"CASE
WHEN topics.pinned_at IS NOT NULL THEN 100
ELSE hot_topics.score + (COALESCE(categories.hotness, 5.0) / 11.0)
END DESC"
end
end
def order_by_category_sql(dir)
"CASE WHEN categories.id = #{SiteSetting.uncategorized_category_id.to_i} THEN '' ELSE categories.name END #{dir}"
end
# If you've clearned the pin, use bumped_at, otherwise put it at the top
def order_nocategory_with_pinned_sql
"CASE
WHEN topics.category_id = #{SiteSetting.uncategorized_category_id.to_i} and (COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}'))
THEN '#{highest_date}'
ELSE topics.bumped_at
END DESC"
end
# For anonymous users
def order_nocategory_basic_bumped
"CASE WHEN topics.category_id = #{SiteSetting.uncategorized_category_id.to_i} and (topics.pinned_at IS NOT NULL) THEN 0 ELSE 1 END, topics.bumped_at DESC"
end
def order_basic_bumped
"CASE WHEN (topics.pinned_at IS NOT NULL) THEN 0 ELSE 1 END, topics.bumped_at DESC"
end
def order_with_pinned_sql
"CASE
WHEN (COALESCE(topics.pinned_at, '#{lowest_date}') > COALESCE(tu.cleared_pinned_at, '#{lowest_date}'))
THEN '#{highest_date}'
ELSE topics.bumped_at
END DESC"
end
end
end