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class MembersFinder
attr_reader :project, :current_user, :group
def initialize(project, current_user)
@project = project
@current_user = current_user
@group = project.group
end
def execute
project_members = project.project_members
project_members = project_members.non_invite unless can?(current_user, :admin_project, project)
if group
group_members = GroupMembersFinder.new(group).execute
group_members = group_members.non_invite unless can?(current_user, :admin_group, group)
union = Gitlab::SQL::Union.new([project_members, group_members], remove_duplicates: false)
# We're interested in a list of members without duplicates by user_id.
# We prefer project members over group members, project members should go first.
#
# We could have used a DISTINCT ON here, but MySQL does not support this.
sql = <<-SQL
SELECT member_numbered.*
FROM (
SELECT
member_union.*,
ROW_NUMBER() OVER (
PARTITION BY user_id ORDER BY CASE WHEN type = 'ProjectMember' THEN 1 WHEN type = 'GroupMember' THEN 2 ELSE 3 END
) AS row_number
FROM (#{union.to_sql}) AS member_union
) AS member_numbered
WHERE row_number = 1
SQL
Member.from("(#{sql}) AS #{Member.table_name}")
else
project_members
end
end
def can?(*args)
Ability.allowed?(*args)
end
end
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