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# TodosFinder
#
# Used to filter Todos by set of params
#
# Arguments:
# current_user - which user use
# params:
# action_id: integer
# author_id: integer
# project_id; integer
# state: 'pending' (default) or 'done'
# type: 'Issue' or 'MergeRequest'
#
class TodosFinder
NONE = '0'.freeze
attr_accessor :current_user, :params
def initialize(current_user, params = {})
@current_user = current_user
@params = params
end
def execute
items = current_user.todos
items = include_associations(items)
items = by_action_id(items)
items = by_action(items)
items = by_author(items)
items = by_state(items)
items = by_type(items)
# Filtering by project HAS TO be the last because we use
# the project IDs yielded by the todos query thus far
items = by_project(items)
sort(items)
end
private
def include_associations(items)
return items unless params[:include_associations]
items.includes(
[
target: { project: [:route, namespace: :route] },
author: { namespace: :route },
]
)
end
def action_id?
action_id.present? && Todo::ACTION_NAMES.has_key?(action_id.to_i)
end
def action_id
params[:action_id]
end
def to_action_id
Todo::ACTION_NAMES.key(action.to_sym)
end
def action?
action.present? && to_action_id
end
def action
params[:action]
end
def author?
params[:author_id].present?
end
def author
return @author if defined?(@author)
@author =
if author? && params[:author_id] != NONE
User.find(params[:author_id])
else
nil
end
end
def project?
params[:project_id].present?
end
def project
return @project if defined?(@project)
if project?
@project = Project.find(params[:project_id])
unless Ability.allowed?(current_user, :read_project, @project)
@project = nil
end
else
@project = nil
end
@project
end
def projects(items)
item_project_ids = items.reorder(nil).select(:project_id)
ProjectsFinder.new.execute(current_user, item_project_ids)
end
def type?
type.present? && %w(Issue MergeRequest).include?(type)
end
def type
params[:type]
end
def sort(items)
params[:sort] ? items.sort(params[:sort]) : items.reorder(id: :desc)
end
def by_action(items)
if action?
items = items.where(action: to_action_id)
end
items
end
def by_action_id(items)
if action_id?
items = items.where(action: action_id)
end
items
end
def by_author(items)
if author?
items = items.where(author_id: author.try(:id))
end
items
end
def by_project(items)
if project?
items = items.where(project: project)
else
item_projects = projects(items)
items = items.merge(item_projects).joins(:project)
end
items
end
def by_state(items)
case params[:state].to_s
when 'done'
items.done
else
items.pending
end
end
def by_type(items)
if type?
items = items.where(target_type: type)
end
items
end
end