Merge branch 'issue_198425' into 'master'

Allow to query group milestones with GraphQL

See merge request gitlab-org/gitlab!23635

app/finders/concerns/time_frame_filter.rb

+# frozen_string_literal: true
+
+module TimeFrameFilter
+  def by_timeframe(items)
+    return items unless params[:start_date] && params[:start_date]
+
+    start_date = params[:start_date].to_date
+    end_date = params[:end_date].to_date
+
+    items.within_timeframe(start_date, end_date)
+  rescue ArgumentError
+    items
+  end
+end

app/finders/milestones_finder.rb

@@ -11,6 +11,7 @@
 
 class MilestonesFinder
   include FinderMethods
+  include TimeFrameFilter
 
   attr_reader :params
 
@@ -24,6 +25,7 @@ class MilestonesFinder
     items = by_title(items)
     items = by_search_title(items)
     items = by_state(items)
+    items = by_timeframe(items)
 
     order(items)
   end

app/graphql/resolvers/concerns/time_frame_arguments.rb

+# frozen_string_literal: true
+
+module TimeFrameArguments
+  extend ActiveSupport::Concern
+
+  included do
+    argument :start_date, Types::TimeType,
+             required: false,
+             description: 'List items within a time frame where items.start_date is between startDate and endDate parameters (endDate parameter must be present)'
+
+    argument :end_date, Types::TimeType,
+             required: false,
+             description: 'List items within a time frame where items.end_date is between startDate and endDate parameters (startDate parameter must be present)'
+  end
+
+  def validate_timeframe_params!(args)
+    return unless args[:start_date].present? || args[:end_date].present?
+
+    error_message =
+      if args[:start_date].nil? || args[:end_date].nil?
+        "Both startDate and endDate must be present."
+      elsif args[:start_date] > args[:end_date]
+        "startDate is after endDate"
+      end
+
+    if error_message
+      raise Gitlab::Graphql::Errors::ArgumentError, error_message
+    end
+  end
+end

app/graphql/resolvers/milestone_resolver.rb

+# frozen_string_literal: true
+
+module Resolvers
+  class MilestoneResolver < BaseResolver
+    include Gitlab::Graphql::Authorize::AuthorizeResource
+    include TimeFrameArguments
+
+    argument :state, Types::MilestoneStateEnum,
+              required: false,
+              description: 'Filter milestones by state'
+
+    type Types::MilestoneType, null: true
+
+    def resolve(**args)
+      validate_timeframe_params!(args)
+
+      authorize!
+
+      MilestonesFinder.new(milestones_finder_params(args)).execute
+    end
+
+    private
+
+    def milestones_finder_params(args)
+      {
+        state: args[:state] || 'all',
+        start_date: args[:start_date],
+        end_date: args[:end_date]
+      }.merge(parent_id_parameter)
+    end
+
+    def parent
+      @parent ||= object.respond_to?(:sync) ? object.sync : object
+    end
+
+    def parent_id_parameter
+      if parent.is_a?(Group)
+        { group_ids: parent.id }
+      elsif parent.is_a?(Project)
+        { project_ids: parent.id }
+      end
+    end
+
+    # MilestonesFinder does not check for current_user permissions,
+    # so for now we need to keep it here.
+    def authorize!
+      Ability.allowed?(context[:current_user], :read_milestone, parent) || raise_resource_not_available_error!
+    end
+  end
+end

app/graphql/types/group_type.rb

@@ -42,6 +42,10 @@ module Types
     field :parent, GroupType, null: true,
           description: 'Parent group',
           resolve: -> (obj, _args, _ctx) { Gitlab::Graphql::Loaders::BatchModelLoader.new(Group, obj.parent_id).find }
+
+    field :milestones, Types::MilestoneType.connection_type, null: true,
+          description: 'Find milestones',
+          resolver: Resolvers::MilestoneResolver
   end
 end
 

app/graphql/types/milestone_state_enum.rb

+# frozen_string_literal: true
+
+module Types
+  class MilestoneStateEnum < BaseEnum
+    value 'active'
+    value 'closed'
+  end
+end

app/graphql/types/milestone_type.rb

@@ -3,25 +3,36 @@
 module Types
   class MilestoneType < BaseObject
     graphql_name 'Milestone'
+    description 'Represents a milestone.'
+
+    present_using MilestonePresenter
 
     authorize :read_milestone
 
     field :id, GraphQL::ID_TYPE, null: false,
           description: 'ID of the milestone'
-    field :description, GraphQL::STRING_TYPE, null: true,
-          description: 'Description of the milestone'
+
     field :title, GraphQL::STRING_TYPE, null: false,
           description: 'Title of the milestone'
-    field :state, GraphQL::STRING_TYPE, null: false,
+
+    field :description, GraphQL::STRING_TYPE, null: true,
+          description: 'Description of the milestone'
+
+    field :state, Types::MilestoneStateEnum, null: false,
           description: 'State of the milestone'
 
+    field :web_path, GraphQL::STRING_TYPE, null: false, method: :milestone_path,
+          description: 'Web path of the milestone'
+
     field :due_date, Types::TimeType, null: true,
           description: 'Timestamp of the milestone due date'
+
     field :start_date, Types::TimeType, null: true,
           description: 'Timestamp of the milestone start date'
 
     field :created_at, Types::TimeType, null: false,
           description: 'Timestamp of milestone creation'
+
     field :updated_at, Types::TimeType, null: false,
           description: 'Timestamp of last milestone update'
   end

app/models/milestone.rb

@@ -59,6 +59,12 @@ class Milestone < ApplicationRecord
     where(project_id: projects).or(where(group_id: groups))
   end
 
+  scope :within_timeframe, -> (start_date, end_date) do
+    where('start_date is not NULL or due_date is not NULL')
+      .where('start_date is NULL or start_date <= ?', end_date)
+      .where('due_date is NULL or due_date >= ?', start_date)
+  end
+
   scope :order_by_name_asc, -> { order(Arel::Nodes::Ascending.new(arel_table[:title].lower)) }
   scope :reorder_by_due_date_asc, -> { reorder(Gitlab::Database.nulls_last_order('due_date', 'ASC')) }
 

app/presenters/milestone_presenter.rb

+# frozen_string_literal: true
+
+class MilestonePresenter < Gitlab::View::Presenter::Delegated
+  presents :milestone
+
+  def milestone_path
+    url_builder.milestone_path(milestone)
+  end
+
+  private
+
+  def url_builder
+    @url_builder ||= Gitlab::UrlBuilder.new(milestone)
+  end
+end

changelogs/unreleased/issue_198425.yml

+---
+title: Expose group milestones on GraphQL
+merge_request: 23635
+author:
+type: added

doc/api/graphql/reference/gitlab_schema.graphql

@@ -1735,8 +1735,8 @@ type Epic implements Noteable {
     before: String
 
     """
-    List epics within a time frame where epics.end_date is between start_date
-    and end_date parameters (start_date parameter must be present)
+    List items within a time frame where items.end_date is between startDate and
+    endDate parameters (startDate parameter must be present)
     """
     endDate: Time
 
@@ -1776,8 +1776,8 @@ type Epic implements Noteable {
     sort: EpicSort
 
     """
-    List epics within a time frame where epics.start_date is between start_date
-    and end_date parameters (end_date parameter must be present)
+    List items within a time frame where items.start_date is between startDate
+    and endDate parameters (endDate parameter must be present)
     """
     startDate: Time
 
@@ -2704,8 +2704,8 @@ type Group {
     authorUsername: String
 
     """
-    List epics within a time frame where epics.end_date is between start_date
-    and end_date parameters (start_date parameter must be present)
+    List items within a time frame where items.end_date is between startDate and
+    endDate parameters (startDate parameter must be present)
     """
     endDate: Time
 
@@ -2735,8 +2735,8 @@ type Group {
     sort: EpicSort
 
     """
-    List epics within a time frame where epics.start_date is between start_date
-    and end_date parameters (end_date parameter must be present)
+    List items within a time frame where items.start_date is between startDate
+    and endDate parameters (endDate parameter must be present)
     """
     startDate: Time
 
@@ -2766,8 +2766,8 @@ type Group {
     before: String
 
     """
-    List epics within a time frame where epics.end_date is between start_date
-    and end_date parameters (start_date parameter must be present)
+    List items within a time frame where items.end_date is between startDate and
+    endDate parameters (startDate parameter must be present)
     """
     endDate: Time
 
@@ -2807,8 +2807,8 @@ type Group {
     sort: EpicSort
 
     """
-    List epics within a time frame where epics.start_date is between start_date
-    and end_date parameters (end_date parameter must be present)
+    List items within a time frame where items.start_date is between startDate
+    and endDate parameters (endDate parameter must be present)
     """
     startDate: Time
 
@@ -2853,6 +2853,48 @@ type Group {
   """
   mentionsDisabled: Boolean
 
+  """
+  Find milestones
+  """
+  milestones(
+    """
+    Returns the elements in the list that come after the specified cursor.
+    """
+    after: String
+
+    """
+    Returns the elements in the list that come before the specified cursor.
+    """
+    before: String
+
+    """
+    List items within a time frame where items.end_date is between startDate and
+    endDate parameters (startDate parameter must be present)
+    """
+    endDate: Time
+
+    """
+    Returns the first _n_ elements from the list.
+    """
+    first: Int
+
+    """
+    Returns the last _n_ elements from the list.
+    """
+    last: Int
+
+    """
+    List items within a time frame where items.start_date is between startDate
+    and endDate parameters (endDate parameter must be present)
+    """
+    startDate: Time
+
+    """
+    Filter milestones by state
+    """
+    state: MilestoneStateEnum
+  ): MilestoneConnection
+
   """
   Name of the namespace
   """
@@ -4457,6 +4499,9 @@ type Metadata {
   version: String!
 }
 
+"""
+Represents a milestone.
+"""
 type Milestone {
   """
   Timestamp of milestone creation
@@ -4486,7 +4531,7 @@ type Milestone {
   """
   State of the milestone
   """
-  state: String!
+  state: MilestoneStateEnum!
 
   """
   Title of the milestone
@@ -4497,6 +4542,51 @@ type Milestone {
   Timestamp of last milestone update
   """
   updatedAt: Time!
+
+  """
+  Web path of the milestone
+  """
+  webPath: String!
+}
+
+"""
+The connection type for Milestone.
+"""
+type MilestoneConnection {
+  """
+  A list of edges.
+  """
+  edges: [MilestoneEdge]
+
+  """
+  A list of nodes.
+  """
+  nodes: [Milestone]
+
+  """
+  Information to aid in pagination.
+  """
+  pageInfo: PageInfo!
+}
+
+"""
+An edge in a connection.
+"""
+type MilestoneEdge {
+  """
+  A cursor for use in pagination.
+  """
+  cursor: String!
+
+  """
+  The item at the end of the edge.
+  """
+  node: Milestone
+}
+
+enum MilestoneStateEnum {
+  active
+  closed
 }
 
 """

doc/api/graphql/reference/gitlab_schema.json

@@ -3150,6 +3150,26 @@
               "name": "epic",
               "description": "Find a single epic",
               "args": [
+                {
+                  "name": "startDate",
+                  "description": "List items within a time frame where items.start_date is between startDate and endDate parameters (endDate parameter must be present)",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Time",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
+                {
+                  "name": "endDate",
+                  "description": "List items within a time frame where items.end_date is between startDate and endDate parameters (startDate parameter must be present)",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Time",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
                 {
                   "name": "iid",
                   "description": "IID of the epic, e.g., \"1\"",
@@ -3235,10 +3255,23 @@
                     }
                   },
                   "defaultValue": null
-                },
+                }
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "Epic",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "epics",
+              "description": "Find epics",
+              "args": [
                 {
                   "name": "startDate",
-                  "description": "List epics within a time frame where epics.start_date is between start_date and end_date parameters (end_date parameter must be present)",
+                  "description": "List items within a time frame where items.start_date is between startDate and endDate parameters (endDate parameter must be present)",
                   "type": {
                     "kind": "SCALAR",
                     "name": "Time",
@@ -3248,27 +3281,14 @@
                 },
                 {
                   "name": "endDate",
-                  "description": "List epics within a time frame where epics.end_date is between start_date and end_date parameters (start_date parameter must be present)",
+                  "description": "List items within a time frame where items.end_date is between startDate and endDate parameters (startDate parameter must be present)",
                   "type": {
                     "kind": "SCALAR",
                     "name": "Time",
                     "ofType": null
                   },
                   "defaultValue": null
-                }
-              ],
-              "type": {
-                "kind": "OBJECT",
-                "name": "Epic",
-                "ofType": null
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "epics",
-              "description": "Find epics",
-              "args": [
+                },
                 {
                   "name": "iid",
                   "description": "IID of the epic, e.g., \"1\"",
@@ -3355,26 +3375,6 @@
                   },
                   "defaultValue": null
                 },
-                {
-                  "name": "startDate",
-                  "description": "List epics within a time frame where epics.start_date is between start_date and end_date parameters (end_date parameter must be present)",
-                  "type": {
-                    "kind": "SCALAR",
-                    "name": "Time",
-                    "ofType": null
-                  },
-                  "defaultValue": null
-                },
-                {
-                  "name": "endDate",
-                  "description": "List epics within a time frame where epics.end_date is between start_date and end_date parameters (start_date parameter must be present)",
-                  "type": {
-                    "kind": "SCALAR",
-                    "name": "Time",
-                    "ofType": null
-                  },
-                  "defaultValue": null
-                },
                 {
                   "name": "after",
                   "description": "Returns the elements in the list that come after the specified cursor.",
@@ -3534,6 +3534,89 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "milestones",
+              "description": "Find milestones",
+              "args": [
+                {
+                  "name": "startDate",
+                  "description": "List items within a time frame where items.start_date is between startDate and endDate parameters (endDate parameter must be present)",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Time",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
+                {
+                  "name": "endDate",
+                  "description": "List items within a time frame where items.end_date is between startDate and endDate parameters (startDate parameter must be present)",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Time",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
+                {
+                  "name": "state",
+                  "description": "Filter milestones by state",
+                  "type": {
+                    "kind": "ENUM",
+                    "name": "MilestoneStateEnum",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
+                {
+                  "name": "after",
+                  "description": "Returns the elements in the list that come after the specified cursor.",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "String",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
+                {
+                  "name": "before",
+                  "description": "Returns the elements in the list that come before the specified cursor.",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "String",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
+                {
+                  "name": "first",
+                  "description": "Returns the first _n_ elements from the list.",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Int",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
+                {
+                  "name": "last",
+                  "description": "Returns the last _n_ elements from the list.",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Int",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                }
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "MilestoneConnection",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "name",
               "description": "Name of the namespace",
@@ -3821,22 +3904,306 @@
               "deprecationReason": null
             },
             {
-              "name": "twoFactorGracePeriod",
-              "description": "Time before two-factor authentication is enforced",
+              "name": "twoFactorGracePeriod",
+              "description": "Time before two-factor authentication is enforced",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "Int",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "userPermissions",
+              "description": "Permissions for the current user on the resource",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "OBJECT",
+                  "name": "GroupPermissions",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "visibility",
+              "description": "Visibility of the namespace",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "webUrl",
+              "description": "Web URL of the group",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
+        {
+          "kind": "OBJECT",
+          "name": "GroupPermissions",
+          "description": null,
+          "fields": [
+            {
+              "name": "readGroup",
+              "description": "Indicates the user can perform `read_group` on this resource",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Boolean",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
+        {
+          "kind": "OBJECT",
+          "name": "MilestoneConnection",
+          "description": "The connection type for Milestone.",
+          "fields": [
+            {
+              "name": "edges",
+              "description": "A list of edges.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "LIST",
+                "name": null,
+                "ofType": {
+                  "kind": "OBJECT",
+                  "name": "MilestoneEdge",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "nodes",
+              "description": "A list of nodes.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "LIST",
+                "name": null,
+                "ofType": {
+                  "kind": "OBJECT",
+                  "name": "Milestone",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "pageInfo",
+              "description": "Information to aid in pagination.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "OBJECT",
+                  "name": "PageInfo",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
+        {
+          "kind": "OBJECT",
+          "name": "MilestoneEdge",
+          "description": "An edge in a connection.",
+          "fields": [
+            {
+              "name": "cursor",
+              "description": "A cursor for use in pagination.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "node",
+              "description": "The item at the end of the edge.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "Milestone",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
+        {
+          "kind": "OBJECT",
+          "name": "Milestone",
+          "description": "Represents a milestone.",
+          "fields": [
+            {
+              "name": "createdAt",
+              "description": "Timestamp of milestone creation",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Time",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "description",
+              "description": "Description of the milestone",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "dueDate",
+              "description": "Timestamp of the milestone due date",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "Time",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "id",
+              "description": "ID of the milestone",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "ID",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "startDate",
+              "description": "Timestamp of the milestone start date",
               "args": [
 
               ],
               "type": {
                 "kind": "SCALAR",
-                "name": "Int",
+                "name": "Time",
                 "ofType": null
               },
               "isDeprecated": false,
               "deprecationReason": null
             },
             {
-              "name": "userPermissions",
-              "description": "Permissions for the current user on the resource",
+              "name": "state",
+              "description": "State of the milestone",
               "args": [
 
               ],
@@ -3844,8 +4211,8 @@
                 "kind": "NON_NULL",
                 "name": null,
                 "ofType": {
-                  "kind": "OBJECT",
-                  "name": "GroupPermissions",
+                  "kind": "ENUM",
+                  "name": "MilestoneStateEnum",
                   "ofType": null
                 }
               },
@@ -3853,22 +4220,26 @@
               "deprecationReason": null
             },
             {
-              "name": "visibility",
-              "description": "Visibility of the namespace",
+              "name": "title",
+              "description": "Title of the milestone",
               "args": [
 
               ],
               "type": {
-                "kind": "SCALAR",
-                "name": "String",
-                "ofType": null
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
               },
               "isDeprecated": false,
               "deprecationReason": null
             },
             {
-              "name": "webUrl",
-              "description": "Web URL of the group",
+              "name": "updatedAt",
+              "description": "Timestamp of last milestone update",
               "args": [
 
               ],
@@ -3877,29 +4248,16 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "String",
+                  "name": "Time",
                   "ofType": null
                 }
               },
               "isDeprecated": false,
               "deprecationReason": null
-            }
-          ],
-          "inputFields": null,
-          "interfaces": [
-
-          ],
-          "enumValues": null,
-          "possibleTypes": null
-        },
-        {
-          "kind": "OBJECT",
-          "name": "GroupPermissions",
-          "description": null,
-          "fields": [
+            },
             {
-              "name": "readGroup",
-              "description": "Indicates the user can perform `read_group` on this resource",
+              "name": "webPath",
+              "description": "Web path of the milestone",
               "args": [
 
               ],
@@ -3908,7 +4266,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "Boolean",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -3923,6 +4281,29 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "ENUM",
+          "name": "MilestoneStateEnum",
+          "description": null,
+          "fields": null,
+          "inputFields": null,
+          "interfaces": null,
+          "enumValues": [
+            {
+              "name": "active",
+              "description": null,
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "closed",
+              "description": null,
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "possibleTypes": null
+        },
         {
           "kind": "OBJECT",
           "name": "Epic",
@@ -3950,6 +4331,26 @@
               "name": "children",
               "description": "Children (sub-epics) of the epic",
               "args": [
+                {
+                  "name": "startDate",
+                  "description": "List items within a time frame where items.start_date is between startDate and endDate parameters (endDate parameter must be present)",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Time",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
+                {
+                  "name": "endDate",
+                  "description": "List items within a time frame where items.end_date is between startDate and endDate parameters (startDate parameter must be present)",
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Time",
+                    "ofType": null
+                  },
+                  "defaultValue": null
+                },
                 {
                   "name": "iid",
                   "description": "IID of the epic, e.g., \"1\"",
@@ -4036,26 +4437,6 @@
                   },
                   "defaultValue": null
                 },
-                {
-                  "name": "startDate",
-                  "description": "List epics within a time frame where epics.start_date is between start_date and end_date parameters (end_date parameter must be present)",
-                  "type": {
-                    "kind": "SCALAR",
-                    "name": "Time",
-                    "ofType": null
-                  },
-                  "defaultValue": null
-                },
-                {
-                  "name": "endDate",
-                  "description": "List epics within a time frame where epics.end_date is between start_date and end_date parameters (start_date parameter must be present)",
-                  "type": {
-                    "kind": "SCALAR",
-                    "name": "Time",
-                    "ofType": null
-                  },
-                  "defaultValue": null
-                },
                 {
                   "name": "after",
                   "description": "Returns the elements in the list that come after the specified cursor.",
@@ -9583,151 +9964,6 @@
           ],
           "possibleTypes": null
         },
-        {
-          "kind": "OBJECT",
-          "name": "Milestone",
-          "description": null,
-          "fields": [
-            {
-              "name": "createdAt",
-              "description": "Timestamp of milestone creation",
-              "args": [
-
-              ],
-              "type": {
-                "kind": "NON_NULL",
-                "name": null,
-                "ofType": {
-                  "kind": "SCALAR",
-                  "name": "Time",
-                  "ofType": null
-                }
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "description",
-              "description": "Description of the milestone",
-              "args": [
-
-              ],
-              "type": {
-                "kind": "SCALAR",
-                "name": "String",
-                "ofType": null
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "dueDate",
-              "description": "Timestamp of the milestone due date",
-              "args": [
-
-              ],
-              "type": {
-                "kind": "SCALAR",
-                "name": "Time",
-                "ofType": null
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "id",
-              "description": "ID of the milestone",
-              "args": [
-
-              ],
-              "type": {
-                "kind": "NON_NULL",
-                "name": null,
-                "ofType": {
-                  "kind": "SCALAR",
-                  "name": "ID",
-                  "ofType": null
-                }
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "startDate",
-              "description": "Timestamp of the milestone start date",
-              "args": [
-
-              ],
-              "type": {
-                "kind": "SCALAR",
-                "name": "Time",
-                "ofType": null
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "state",
-              "description": "State of the milestone",
-              "args": [
-
-              ],
-              "type": {
-                "kind": "NON_NULL",
-                "name": null,
-                "ofType": {
-                  "kind": "SCALAR",
-                  "name": "String",
-                  "ofType": null
-                }
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "title",
-              "description": "Title of the milestone",
-              "args": [
-
-              ],
-              "type": {
-                "kind": "NON_NULL",
-                "name": null,
-                "ofType": {
-                  "kind": "SCALAR",
-                  "name": "String",
-                  "ofType": null
-                }
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "updatedAt",
-              "description": "Timestamp of last milestone update",
-              "args": [
-
-              ],
-              "type": {
-                "kind": "NON_NULL",
-                "name": null,
-                "ofType": {
-                  "kind": "SCALAR",
-                  "name": "Time",
-                  "ofType": null
-                }
-              },
-              "isDeprecated": false,
-              "deprecationReason": null
-            }
-          ],
-          "inputFields": null,
-          "interfaces": [
-
-          ],
-          "enumValues": null,
-          "possibleTypes": null
-        },
         {
           "kind": "OBJECT",
           "name": "TaskCompletionStatus",

doc/api/graphql/reference/index.md

@@ -683,6 +683,8 @@ Autogenerated return type of MergeRequestSetWip
 
 ## Milestone
 
+Represents a milestone.
+
 | Name  | Type  | Description |
 | ---   |  ---- | ----------  |
 | `createdAt` | Time! | Timestamp of milestone creation |
@@ -690,9 +692,10 @@ Autogenerated return type of MergeRequestSetWip
 | `dueDate` | Time | Timestamp of the milestone due date |
 | `id` | ID! | ID of the milestone |
 | `startDate` | Time | Timestamp of the milestone start date |
-| `state` | String! | State of the milestone |
+| `state` | MilestoneStateEnum! | State of the milestone |
 | `title` | String! | Title of the milestone |
 | `updatedAt` | Time! | Timestamp of last milestone update |
+| `webPath` | String! | Web path of the milestone |
 
 ## Namespace
 

ee/app/finders/epics_finder.rb

@@ -20,6 +20,8 @@
 #   include_descendant_groups: boolean
 
 class EpicsFinder < IssuableFinder
+  include TimeFrameFilter
+
   def self.scalar_params
     @scalar_params ||= %i[
       parent_id
@@ -114,22 +116,6 @@ class EpicsFinder < IssuableFinder
     end
   end
 
-  # rubocop: disable CodeReuse/ActiveRecord
-  def by_timeframe(items)
-    return items unless params[:start_date] && params[:end_date]
-
-    end_date = params[:end_date].to_date
-    start_date = params[:start_date].to_date
-
-    items
-      .where('epics.start_date is not NULL or epics.end_date is not NULL')
-      .where('epics.start_date is NULL or epics.start_date <= ?', end_date)
-      .where('epics.end_date is NULL or epics.end_date >= ?', start_date)
-  rescue ArgumentError
-    items
-  end
-  # rubocop: enable CodeReuse/ActiveRecord
-
   def parent_id?
     params[:parent_id].present?
   end

ee/app/graphql/resolvers/epic_resolver.rb

@@ -2,6 +2,8 @@
 
 module Resolvers
   class EpicResolver < BaseResolver
+    include TimeFrameArguments
+
     argument :iid, GraphQL::ID_TYPE,
              required: false,
              description: 'IID of the epic, e.g., "1"'
@@ -30,14 +32,6 @@ module Resolvers
              required: false,
              description: 'Filter epics by labels'
 
-    argument :start_date, Types::TimeType,
-             required: false,
-             description: 'List epics within a time frame where epics.start_date is between start_date and end_date parameters (end_date parameter must be present)'
-
-    argument :end_date, Types::TimeType,
-             required: false,
-             description: 'List epics within a time frame where epics.end_date is between start_date and end_date parameters (start_date parameter must be present)'
-
     type Types::EpicType, null: true
 
     def resolve(**args)
@@ -46,7 +40,7 @@ module Resolvers
       return [] unless resolver_object.present?
       return [] unless epic_feature_enabled?
 
-      validate_date_params!(args)
+      validate_timeframe_params!(args)
 
       find_epics(transform_args(args))
     end
@@ -63,16 +57,6 @@ module Resolvers
       group.feature_available?(:epics)
     end
 
-    def validate_date_params!(args)
-      return unless args[:start_date].present? || args[:end_date].present?
-
-      date_params_complete = args[:start_date] && args[:end_date]
-
-      unless date_params_complete
-        raise Gitlab::Graphql::Errors::ArgumentError, "Both start_date and end_date must be present."
-      end
-    end
-
     def transform_args(args)
       transformed             = args.dup
       transformed[:group_id]  = group.id

ee/app/models/ee/epic.rb

@@ -67,6 +67,12 @@ module EE
       scope :in_issues, -> (issues) { joins(:epic_issues).where(epic_issues: { issue_id: issues }).distinct }
       scope :has_parent, -> { where.not(parent_id: nil) }
 
+      scope :within_timeframe, -> (start_date, end_date) do
+        where('start_date is not NULL or end_date is not NULL')
+          .where('start_date is NULL or start_date <= ?', end_date)
+          .where('end_date is NULL or end_date >= ?', start_date)
+      end
+
       scope :order_start_or_end_date_asc, -> do
         reorder(Arel.sql("COALESCE(start_date, end_date) ASC NULLS FIRST"))
       end

ee/spec/graphql/resolvers/epic_resolver_spec.rb

@@ -73,13 +73,13 @@ describe Resolvers::EpicResolver do
         end
 
         context 'when only start_date is present' do
-          it 'returns epics within timeframe' do
+          it 'raises error' do
             expect { resolve_epics(start_date: '2019-08-13') }.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
           end
         end
 
         context 'when only end_date is present' do
-          it 'returns epics within timeframe' do
+          it 'raises error' do
             expect { resolve_epics(end_date: '2019-08-13') }.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
           end
         end

ee/spec/models/epic_spec.rb

@@ -284,6 +284,15 @@ describe Epic do
     end
   end
 
+  it_behaves_like 'within_timeframe scope' do
+    let_it_be(:now) { Time.now }
+    let_it_be(:group) { create(:group) }
+    let_it_be(:resource_1) { create(:epic, group: group, start_date: now - 1.day, end_date: now + 1.day) }
+    let_it_be(:resource_2) { create(:epic, group: group, start_date: now + 2.days, end_date: now + 3.days) }
+    let_it_be(:resource_3) { create(:epic, group: group, end_date: now) }
+    let_it_be(:resource_4) { create(:epic, group: group, start_date: now) }
+  end
+
   describe '#start_date_from_milestones' do
     context 'fixed date' do
       it 'returns start date from start date sourcing milestone' do

spec/finders/milestones_finder_spec.rb

@@ -3,13 +3,14 @@
 require 'spec_helper'
 
 describe MilestonesFinder do
+  let(:now) { Time.now }
   let(:group) { create(:group) }
   let(:project_1) { create(:project, namespace: group) }
   let(:project_2) { create(:project, namespace: group) }
-  let!(:milestone_1) { create(:milestone, group: group, title: 'one test', due_date: Date.today) }
-  let!(:milestone_2) { create(:milestone, group: group) }
-  let!(:milestone_3) { create(:milestone, project: project_1, state: 'active', due_date: Date.tomorrow) }
-  let!(:milestone_4) { create(:milestone, project: project_2, state: 'active') }
+  let!(:milestone_1) { create(:milestone, group: group, title: 'one test', start_date: now - 1.day, due_date: now) }
+  let!(:milestone_2) { create(:milestone, group: group, start_date: now + 1.day, due_date: now + 2.days) }
+  let!(:milestone_3) { create(:milestone, project: project_1, state: 'active', start_date: now + 2.days, due_date: now + 3.days) }
+  let!(:milestone_4) { create(:milestone, project: project_2, state: 'active', start_date: now + 4.days, due_date: now + 5.days) }
 
   it 'returns milestones for projects' do
     result = described_class.new(project_ids: [project_1.id, project_2.id], state: 'all').execute
@@ -33,8 +34,11 @@ describe MilestonesFinder do
     end
 
     it 'orders milestones by due date' do
-      expect(result.first).to eq(milestone_1)
-      expect(result.second).to eq(milestone_3)
+      milestone = create(:milestone, group: group, due_date: now - 2.days)
+
+      expect(result.first).to eq(milestone)
+      expect(result.second).to eq(milestone_1)
+      expect(result.third).to eq(milestone_2)
     end
   end
 
@@ -77,6 +81,34 @@ describe MilestonesFinder do
 
       expect(result.to_a).to contain_exactly(milestone_1)
     end
+
+    context 'by timeframe' do
+      it 'returns milestones with start_date and due_date between timeframe' do
+        params.merge!(start_date: now - 1.day, end_date: now + 3.days)
+
+        milestones = described_class.new(params).execute
+
+        expect(milestones).to match_array([milestone_1, milestone_2, milestone_3])
+      end
+
+      it 'returns milestones which starts before the timeframe' do
+        milestone = create(:milestone, project: project_2, start_date: now - 5.days)
+        params.merge!(start_date: now - 3.days, end_date: now - 2.days)
+
+        milestones = described_class.new(params).execute
+
+        expect(milestones).to match_array([milestone])
+      end
+
+      it 'returns milestones which ends after the timeframe' do
+        milestone = create(:milestone, project: project_2, due_date: now + 6.days)
+        params.merge!(start_date: now + 6.days, end_date: now + 7.days)
+
+        milestones = described_class.new(params).execute
+
+        expect(milestones).to match_array([milestone])
+      end
+    end
   end
 
   describe '#find_by' do

spec/graphql/resolvers/milestone_resolver_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Resolvers::MilestoneResolver do
+  include GraphqlHelpers
+
+  describe '#resolve' do
+    let_it_be(:current_user) { create(:user) }
+
+    context 'for group milestones' do
+      let_it_be(:now) { Time.now }
+      let_it_be(:group) { create(:group, :private) }
+
+      def resolve_group_milestones(args = {}, context = { current_user: current_user })
+        resolve(described_class, obj: group, args: args, ctx: context)
+      end
+
+      before do
+        group.add_developer(current_user)
+      end
+
+      it 'calls MilestonesFinder#execute' do
+        expect_next_instance_of(MilestonesFinder) do |finder|
+          expect(finder).to receive(:execute)
+        end
+
+        resolve_group_milestones
+      end
+
+      context 'without parameters' do
+        it 'calls MilestonesFinder to retrieve all milestones' do
+          expect(MilestonesFinder).to receive(:new)
+            .with(group_ids: group.id, state: 'all', start_date: nil, end_date: nil)
+            .and_call_original
+
+          resolve_group_milestones
+        end
+      end
+
+      context 'with parameters' do
+        it 'calls MilestonesFinder with correct parameters' do
+          start_date = now
+          end_date = start_date + 1.hour
+
+          expect(MilestonesFinder).to receive(:new)
+            .with(group_ids: group.id, state: 'closed', start_date: start_date, end_date: end_date)
+            .and_call_original
+
+          resolve_group_milestones(start_date: start_date, end_date: end_date, state: 'closed')
+        end
+      end
+
+      context 'by timeframe' do
+        context 'when start_date and end_date are present' do
+          context 'when start date is after end_date' do
+            it 'raises error' do
+              expect do
+                resolve_group_milestones(start_date: now, end_date: now - 2.days)
+              end.to raise_error(Gitlab::Graphql::Errors::ArgumentError, "startDate is after endDate")
+            end
+          end
+        end
+
+        context 'when only start_date is present' do
+          it 'raises error' do
+            expect do
+              resolve_group_milestones(start_date: now)
+            end.to raise_error(Gitlab::Graphql::Errors::ArgumentError, /Both startDate and endDate/)
+          end
+        end
+
+        context 'when only end_date is present' do
+          it 'raises error' do
+            expect do
+              resolve_group_milestones(end_date: now)
+            end.to raise_error(Gitlab::Graphql::Errors::ArgumentError, /Both startDate and endDate/)
+          end
+        end
+      end
+
+      context 'when user cannot read milestones' do
+        it 'raises error' do
+          unauthorized_user = create(:user)
+
+          expect do
+            resolve_group_milestones({}, { current_user: unauthorized_user })
+          end.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+        end
+      end
+    end
+  end
+end

spec/models/milestone_spec.rb

@@ -197,6 +197,15 @@ describe Milestone do
     end
   end
 
+  it_behaves_like 'within_timeframe scope' do
+    let_it_be(:now) { Time.now }
+    let_it_be(:project) { create(:project, :empty_repo) }
+    let_it_be(:resource_1) { create(:milestone, project: project, start_date: now - 1.day, due_date: now + 1.day) }
+    let_it_be(:resource_2) { create(:milestone, project: project, start_date: now + 2.days, due_date: now + 3.days) }
+    let_it_be(:resource_3) { create(:milestone, project: project, due_date: now) }
+    let_it_be(:resource_4) { create(:milestone, project: project, start_date: now) }
+  end
+
   describe "#percent_complete" do
     it "does not count open issues" do
       milestone.issues << issue

spec/presenters/milestone_presenter_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe MilestonePresenter do
+  let_it_be(:user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:milestone) { create(:milestone, group: group) }
+  let_it_be(:presenter) { described_class.new(milestone, current_user: user) }
+
+  before do
+    group.add_developer(user)
+  end
+
+  describe '#milestone_path' do
+    it 'returns correct path' do
+      expect(presenter.milestone_path).to eq("/groups/#{group.full_path}/-/milestones/#{milestone.iid}")
+    end
+  end
+end

spec/requests/api/graphql/group/milestones_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'Milestones through GroupQuery' do
+  include GraphqlHelpers
+
+  let_it_be(:user) { create(:user) }
+  let_it_be(:now) { Time.now }
+  let_it_be(:group) { create(:group, :private) }
+  let_it_be(:milestone_1) { create(:milestone, group: group) }
+  let_it_be(:milestone_2) { create(:milestone, group: group, state: :closed, start_date: now, due_date: now + 1.day) }
+  let_it_be(:milestone_3) { create(:milestone, group: group, start_date: now, due_date: now + 2.days) }
+  let_it_be(:milestone_4) { create(:milestone, group: group, state: :closed, start_date: now - 2.days, due_date: now - 1.day) }
+  let_it_be(:milestone_from_other_group) { create(:milestone, group: create(:group)) }
+
+  let(:milestone_data) { graphql_data['group']['milestones']['edges'] }
+
+  describe 'Get list of milestones from a group' do
+    before do
+      group.add_developer(user)
+    end
+
+    context 'when the request is correct' do
+      before do
+        fetch_milestones(user)
+      end
+
+      it_behaves_like 'a working graphql query'
+
+      it 'returns milestones successfully' do
+        expect(response).to have_gitlab_http_status(200)
+        expect(graphql_errors).to be_nil
+        expect_array_response(milestone_1.to_global_id.to_s, milestone_2.to_global_id.to_s, milestone_3.to_global_id.to_s, milestone_4.to_global_id.to_s)
+      end
+    end
+
+    context 'when filtering by timeframe' do
+      it 'fetches milestones between start_date and due_date' do
+        fetch_milestones(user, { start_date: now.to_s, end_date: (now + 2.days).to_s })
+
+        expect_array_response(milestone_2.to_global_id.to_s, milestone_3.to_global_id.to_s)
+      end
+    end
+
+    context 'when filtering by state' do
+      it 'returns milestones with given state' do
+        fetch_milestones(user, { state: :active })
+
+        expect_array_response(milestone_1.to_global_id.to_s, milestone_3.to_global_id.to_s)
+      end
+    end
+
+    def fetch_milestones(user = nil, args = {})
+      post_graphql(milestones_query(args), current_user: user)
+    end
+
+    def milestones_query(args = {})
+      milestone_node = <<~NODE
+      edges {
+        node {
+          id
+          title
+          state
+        }
+      }
+      NODE
+
+      graphql_query_for("group",
+        { full_path: group.full_path },
+        [query_graphql_field("milestones", args, milestone_node)]
+      )
+    end
+
+    def expect_array_response(*items)
+      expect(response).to have_gitlab_http_status(:success)
+      expect(milestone_data).to be_an Array
+      expect(milestone_node_array('id')).to match_array(items)
+    end
+
+    def milestone_node_array(extract_attribute = nil)
+      node_array(milestone_data, extract_attribute)
+    end
+  end
+end

spec/support/helpers/graphql_helpers.rb

@@ -185,12 +185,13 @@ module GraphqlHelpers
   end
 
   # Fairly dumb Ruby => GraphQL rendering function. Only suitable for testing.
-  # Missing support for Enums (feel free to add if you need it).
+  # Use symbol for Enum values
   def as_graphql_literal(value)
     case value
     when Array then "[#{value.map { |v| as_graphql_literal(v) }.join(',')}]"
     when Integer, Float then value.to_s
     when String then "\"#{value.gsub(/"/, '\\"')}\""
+    when Symbol then value
     when nil then 'null'
     when true then 'true'
     when false then 'false'

spec/support/shared_examples/policies/within_timeframe_shared_examples.rb

+# frozen_string_literal: true
+
+RSpec.shared_examples 'within_timeframe scope' do
+  describe '.within_timeframe' do
+    it 'returns resources with start_date and/or end_date between timeframe' do
+      resources = described_class.within_timeframe(now + 2.days, now + 3.days)
+
+      expect(resources).to match_array([resource_2, resource_4])
+    end
+
+    it 'returns resources which starts before the timeframe' do
+      resources = described_class.within_timeframe(now, now + 1.day)
+
+      expect(resources).to match_array([resource_1, resource_3, resource_4])
+    end
+
+    it 'returns resources which ends after the timeframe' do
+      resources = described_class.within_timeframe(now + 3.days, now + 5.days)
+
+      expect(resources).to match_array([resource_2, resource_4])
+    end
+  end
+end