summaryrefslogtreecommitdiff
path: root/app/models/concerns/routable.rb
blob: 71d8e06de765c35b6a6b82ea4b935ad04c0ba3c1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
# frozen_string_literal: true

# Store object full path in separate table for easy lookup and uniq validation
# Object must have name and path db fields and respond to parent and parent_changed? methods.
module Routable
  extend ActiveSupport::Concern
  include CaseSensitivity

  # Finds a Routable object by its full path, without knowing the class.
  #
  # Usage:
  #
  #     Routable.find_by_full_path('groupname')             # -> Group
  #     Routable.find_by_full_path('groupname/projectname') # -> Project
  #
  # Returns a single object, or nil.
  def self.find_by_full_path(path, follow_redirects: false, route_scope: Route, redirect_route_scope: RedirectRoute)
    return unless path.present?

    # Case sensitive match first (it's cheaper and the usual case)
    # If we didn't have an exact match, we perform a case insensitive search
    #
    # We need to qualify the columns with the table name, to support both direct lookups on
    # Route/RedirectRoute, and scoped lookups through the Routable classes.
    route =
      route_scope.find_by(routes: { path: path }) ||
      route_scope.iwhere(Route.arel_table[:path] => path).take

    if follow_redirects
      route ||= redirect_route_scope.iwhere(RedirectRoute.arel_table[:path] => path).take
    end

    return unless route

    route.is_a?(Routable) ? route : route.source
  end

  included do
    # Remove `inverse_of: source` when upgraded to rails 5.2
    # See https://github.com/rails/rails/pull/28808
    has_one :route, as: :source, autosave: true, dependent: :destroy, inverse_of: :source # rubocop:disable Cop/ActiveRecordDependent
    has_many :redirect_routes, as: :source, autosave: true, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent

    validates :route, presence: true

    scope :with_route, -> { includes(:route) }

    after_validation :set_path_errors

    before_validation :prepare_route
    before_save :prepare_route # in case validation is skipped
  end

  class_methods do
    # Finds a single object by full path match in routes table.
    #
    # Usage:
    #
    #     Klass.find_by_full_path('gitlab-org/gitlab-foss')
    #
    # Returns a single object, or nil.
    def find_by_full_path(path, follow_redirects: false)
      # TODO: Optimize these queries by avoiding joins
      # https://gitlab.com/gitlab-org/gitlab/-/issues/292252
      Routable.find_by_full_path(
        path,
        follow_redirects: follow_redirects,
        route_scope: includes(:route).references(:routes),
        redirect_route_scope: joins(:redirect_routes)
      )
    end

    # Builds a relation to find multiple objects by their full paths.
    #
    # Usage:
    #
    #     Klass.where_full_path_in(%w{gitlab-org/gitlab-foss gitlab-org/gitlab})
    #
    # Returns an ActiveRecord::Relation.
    def where_full_path_in(paths, use_includes: true)
      return none if paths.empty?

      wheres = paths.map do |path|
        "(LOWER(routes.path) = LOWER(#{connection.quote(path)}))"
      end

      route =
        if use_includes
          includes(:route).references(:routes)
        else
          joins(:route)
        end

      route.where(wheres.join(' OR '))
    end
  end

  def full_name
    route&.name || build_full_name
  end

  def full_path
    route&.path || build_full_path
  end

  def full_path_components
    full_path.split('/')
  end

  def build_full_path
    if parent && path
      parent.full_path + '/' + path
    else
      path
    end
  end

  # Group would override this to check from association
  def owned_by?(user)
    owner == user
  end

  private

  def set_path_errors
    route_path_errors = self.errors.delete(:"route.path")
    self.errors[:path].concat(route_path_errors) if route_path_errors
  end

  def full_name_changed?
    name_changed? || parent_changed?
  end

  def full_path_changed?
    path_changed? || parent_changed?
  end

  def build_full_name
    if parent && name
      parent.human_name + ' / ' + name
    else
      name
    end
  end

  def prepare_route
    return unless full_path_changed? || full_name_changed?

    route || build_route(source: self)
    route.path = build_full_path
    route.name = build_full_name
  end
end