Add Snippet GraphQL resolver API

Added resolvers for project and user snippets.

app/graphql/resolvers/concerns/resolves_snippets.rb

+# frozen_string_literal: true
+
+module ResolvesSnippets
+  extend ActiveSupport::Concern
+
+  included do
+    type Types::SnippetType, null: false
+
+    argument :ids, [GraphQL::ID_TYPE],
+             required: false,
+             description: 'Array of global snippet ids, e.g., "gid://gitlab/ProjectSnippet/1"'
+
+    argument :visibility, Types::Snippets::VisibilityScopesEnum,
+             required: false,
+             description: 'The visibility of the snippet'
+  end
+
+  def resolve(**args)
+    resolve_snippets(args)
+  end
+
+  private
+
+  def resolve_snippets(args)
+    SnippetsFinder.new(context[:current_user], snippet_finder_params(args)).execute
+  end
+
+  def snippet_finder_params(args)
+    {
+      ids: resolve_ids(args[:ids]),
+      scope: args[:visibility]
+    }.merge(options_by_type(args[:type]))
+  end
+
+  def resolve_ids(ids)
+    Array.wrap(ids).map { |id| resolve_gid(id, :id) }
+  end
+
+  def resolve_gid(gid, argument)
+    return unless gid.present?
+
+    GlobalID.parse(gid)&.model_id.tap do |id|
+      raise Gitlab::Graphql::Errors::ArgumentError, "Invalid global id format for param #{argument}" if id.nil?
+    end
+  end
+
+  def options_by_type(type)
+    case type
+    when 'personal'
+      { only_personal: true }
+    when 'project'
+      { only_project: true }
+    else
+      {}
+    end
+  end
+end

app/graphql/resolvers/projects/snippets_resolver.rb

+# frozen_string_literal: true
+
+module Resolvers
+  module Projects
+    class SnippetsResolver < BaseResolver
+      include ResolvesSnippets
+
+      alias_method :project, :object
+
+      def resolve(**args)
+        return Snippet.none if project.nil?
+
+        super
+      end
+
+      private
+
+      def snippet_finder_params(args)
+        super.merge(project: project)
+      end
+    end
+  end
+end

app/graphql/resolvers/snippets_resolver.rb

+# frozen_string_literal: true
+
+module Resolvers
+  class SnippetsResolver < BaseResolver
+    include ResolvesSnippets
+
+    ERROR_MESSAGE = 'Filtering by both an author and a project is not supported'
+
+    alias_method :user, :object
+
+    argument :author_id, GraphQL::ID_TYPE,
+              required: false,
+              description: 'The ID of an author'
+
+    argument :project_id, GraphQL::ID_TYPE,
+              required: false,
+              description: 'The ID of a project'
+
+    argument :type, Types::Snippets::TypeEnum,
+              required: false,
+              description: 'The type of snippet'
+
+    argument :explore,
+              GraphQL::BOOLEAN_TYPE,
+              required: false,
+              description: 'Explore personal snippets'
+
+    def resolve(**args)
+      if args[:author_id].present? && args[:project_id].present?
+        raise Gitlab::Graphql::Errors::ArgumentError, ERROR_MESSAGE
+      end
+
+      super
+    end
+
+    private
+
+    def snippet_finder_params(args)
+      super
+        .merge(author: resolve_gid(args[:author_id], :author),
+               project: resolve_gid(args[:project_id], :project),
+               explore: args[:explore])
+    end
+  end
+end

app/graphql/resolvers/users/snippets_resolver.rb

+# frozen_string_literal: true
+
+module Resolvers
+  module Users
+    class SnippetsResolver < BaseResolver
+      include ResolvesSnippets
+
+      alias_method :user, :object
+
+      argument :type, Types::Snippets::TypeEnum,
+               required: false,
+               description: 'The type of snippet'
+
+      private
+
+      def snippet_finder_params(args)
+        super.merge(author: user)
+      end
+    end
+  end
+end

app/graphql/types/notes/noteable_type.rb

@@ -15,6 +15,8 @@ module Types
             Types::IssueType
           when MergeRequest
             Types::MergeRequestType
+          when Snippet
+            Types::SnippetType
           else
             raise "Unknown GraphQL type for #{object}"
           end

app/graphql/types/permission_types/project.rb

@@ -10,13 +10,19 @@ module Types
                 :remove_pages, :read_project, :create_merge_request_in,
                 :read_wiki, :read_project_member, :create_issue, :upload_file,
                 :read_cycle_analytics, :download_code, :download_wiki_code,
-                :fork_project, :create_project_snippet, :read_commit_status,
+                :fork_project, :read_commit_status,
                 :request_access, :create_pipeline, :create_pipeline_schedule,
                 :create_merge_request_from, :create_wiki, :push_code,
                 :create_deployment, :push_to_delete_protected_branch,
                 :admin_wiki, :admin_project, :update_pages,
                 :admin_remote_mirror, :create_label, :update_wiki, :destroy_wiki,
                 :create_pages, :destroy_pages, :read_pages_content, :admin_operations
+
+      permission_field :create_snippet
+
+      def create_snippet
+        Ability.allowed?(context[:current_user], :create_project_snippet, object)
+      end
     end
   end
 end

app/graphql/types/permission_types/snippet.rb

+# frozen_string_literal: true
+
+module Types
+  module PermissionTypes
+    class Snippet < BasePermissionType
+      graphql_name 'SnippetPermissions'
+
+      abilities :create_note, :award_emoji
+
+      permission_field :read_snippet, method: :can_read_snippet?
+      permission_field :update_snippet, method: :can_update_snippet?
+      permission_field :admin_snippet, method: :can_admin_snippet?
+    end
+  end
+end

app/graphql/types/permission_types/user.rb

+# frozen_string_literal: true
+
+module Types
+  module PermissionTypes
+    class User < BasePermissionType
+      graphql_name 'UserPermissions'
+
+      permission_field :create_snippet
+
+      def create_snippet
+        Ability.allowed?(context[:current_user], :create_personal_snippet)
+      end
+    end
+  end
+end

app/graphql/types/project_type.rb

@@ -151,5 +151,11 @@ module Types
           null: true,
           description: 'Detailed version of a Sentry error on the project',
           resolver: Resolvers::ErrorTracking::SentryDetailedErrorResolver
+
+    field :snippets,
+          Types::SnippetType.connection_type,
+          null: true,
+          description: 'Snippets of the project',
+          resolver: Resolvers::Projects::SnippetsResolver
   end
 end

app/graphql/types/query_type.rb

@@ -29,6 +29,12 @@ module Types
           resolver: Resolvers::MetadataResolver,
           description: 'Metadata about GitLab'
 
+    field :snippets,
+          Types::SnippetType.connection_type,
+          null: true,
+          resolver: Resolvers::SnippetsResolver,
+          description: 'Find Snippets visible to the current user'
+
     field :echo, GraphQL::STRING_TYPE, null: false, resolver: Resolvers::EchoResolver # rubocop:disable Graphql/Descriptions
   end
 end

app/graphql/types/snippet_type.rb

+# frozen_string_literal: true
+
+module Types
+  class SnippetType < BaseObject
+    graphql_name 'Snippet'
+    description 'Represents a snippet entry'
+
+    implements(Types::Notes::NoteableType)
+
+    present_using SnippetPresenter
+
+    authorize :read_snippet
+
+    expose_permissions Types::PermissionTypes::Snippet
+
+    field :id, GraphQL::ID_TYPE,
+          description: 'Id of the snippet',
+          null: false
+
+    field :title, GraphQL::STRING_TYPE,
+          description: 'Title of the snippet',
+          null: false
+
+    field :project, Types::ProjectType,
+          description: 'The project the snippet is associated with',
+          null: true,
+          authorize: :read_project,
+          resolve: -> (snippet, args, context) { Gitlab::Graphql::Loaders::BatchModelLoader.new(Project, snippet.project_id).find }
+
+    field :author, Types::UserType,
+          description: 'The owner of the snippet',
+          null: false,
+          resolve: -> (snippet, args, context) { Gitlab::Graphql::Loaders::BatchModelLoader.new(User, snippet.author_id).find }
+
+    field :file_name, GraphQL::STRING_TYPE,
+          description: 'File Name of the snippet',
+          null: true
+
+    field :content, GraphQL::STRING_TYPE,
+          description: 'Content of the snippet',
+          null: false
+
+    field :description, GraphQL::STRING_TYPE,
+          description: 'Description of the snippet',
+          null: true
+
+    field :visibility, GraphQL::STRING_TYPE,
+          description: 'Visibility of the snippet',
+          null: false
+
+    field :created_at, Types::TimeType,
+          description: 'Timestamp this snippet was created',
+          null: false
+
+    field :updated_at, Types::TimeType,
+          description: 'Timestamp this snippet was updated',
+          null: false
+
+    field :web_url, type: GraphQL::STRING_TYPE,
+          description: 'Web URL of the snippet',
+          null: false
+
+    field :raw_url, type: GraphQL::STRING_TYPE,
+          description: 'Raw URL of the snippet',
+          null: false
+
+    markdown_field :description_html, null: true, method: :description
+  end
+end

app/graphql/types/snippets/type_enum.rb

+# frozen_string_literal: true
+
+module Types
+  module Snippets
+    class TypeEnum < BaseEnum
+      value 'personal', value: 'personal'
+      value 'project', value: 'project'
+    end
+  end
+end

app/graphql/types/snippets/visibility_scopes_enum.rb

+# frozen_string_literal: true
+
+module Types
+  module Snippets
+    class VisibilityScopesEnum < BaseEnum
+      value 'private',  value: 'are_private'
+      value 'internal', value: 'are_internal'
+      value 'public',   value: 'are_public'
+    end
+  end
+end

app/graphql/types/user_type.rb

@@ -8,6 +8,8 @@ module Types
 
     present_using UserPresenter
 
+    expose_permissions Types::PermissionTypes::User
+
     field :name, GraphQL::STRING_TYPE, null: false,
           description: 'Human-readable name of the user'
     field :username, GraphQL::STRING_TYPE, null: false,
@@ -19,5 +21,11 @@ module Types
     field :todos, Types::TodoType.connection_type, null: false,
           resolver: Resolvers::TodoResolver,
           description: 'Todos of the user'
+
+    field :snippets,
+          Types::SnippetType.connection_type,
+          null: true,
+          description: 'Snippets authored by the user',
+          resolver: Resolvers::Users::SnippetsResolver
   end
 end

app/policies/personal_snippet_policy.rb

@@ -27,4 +27,7 @@ class PersonalSnippetPolicy < BasePolicy
   rule { can?(:create_note) }.enable :award_emoji
 
   rule { can?(:read_all_resources) }.enable :read_personal_snippet
+
+  # Aliasing the ability to ease GraphQL permissions check
+  rule { can?(:read_personal_snippet) }.enable :read_snippet
 end

app/policies/project_snippet_policy.rb

@@ -45,6 +45,9 @@ class ProjectSnippetPolicy < BasePolicy
   end
 
   rule { ~can?(:read_project_snippet) }.prevent :create_note
+
+  # Aliasing the ability to ease GraphQL permissions check
+  rule { can?(:read_project_snippet) }.enable :read_snippet
 end
 
 ProjectSnippetPolicy.prepend_if_ee('EE::ProjectSnippetPolicy')

app/presenters/snippet_presenter.rb

+# frozen_string_literal: true
+
+class SnippetPresenter < Gitlab::View::Presenter::Delegated
+  presents :snippet
+
+  def web_url
+    Gitlab::UrlBuilder.build(snippet)
+  end
+
+  def raw_url
+    Gitlab::UrlBuilder.build(snippet, raw: true)
+  end
+
+  def can_read_snippet?
+    can_access_resource?("read")
+  end
+
+  def can_update_snippet?
+    can_access_resource?("update")
+  end
+
+  def can_admin_snippet?
+    can_access_resource?("admin")
+  end
+
+  private
+
+  def can_access_resource?(ability_prefix)
+    can?(current_user, ability_name(ability_prefix), snippet)
+  end
+
+  def ability_name(ability_prefix)
+    "#{ability_prefix}_#{snippet.class.underscore}".to_sym
+  end
+end

changelogs/unreleased/fj-36079-snippet-graphql-endpoints.yml

+---
+title: Add Snippet GraphQL resolver endpoints
+merge_request: 20613
+author:
+type: added

doc/api/graphql/index.md

@@ -61,6 +61,7 @@ The GraphQL API includes the following queries at the root level:
 1. `namespace` : Within a namespace it is also possible to fetch `projects`.
 1. `currentUser`: Information about the currently logged in user.
 1. `metaData`: Metadata about GitLab and the GraphQL API.
+1. `snippets`: Snippets visible to the currently logged in user.
 
 Root-level queries are defined in
 [`app/graphql/types/query_type.rb`](https://gitlab.com/gitlab-org/gitlab/blob/master/app/graphql/types/query_type.rb).

doc/api/graphql/reference/gitlab_schema.graphql

@@ -4512,6 +4512,41 @@ type Project {
   """
   sharedRunnersEnabled: Boolean
 
+  """
+  Snippets of the project
+  """
+  snippets(
+    """
+    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
+
+    """
+    Returns the first _n_ elements from the list.
+    """
+    first: Int
+
+    """
+    Array of global snippet ids, e.g., "gid://gitlab/ProjectSnippet/1"
+    """
+    ids: [ID!]
+
+    """
+    Returns the last _n_ elements from the list.
+    """
+    last: Int
+
+    """
+    The visibility of the snippet
+    """
+    visibility: VisibilityScopesEnum
+  ): SnippetConnection
+
   """
   (deprecated) Does this project have snippets enabled?. Use `snippets_access_level` instead
   """
@@ -4675,9 +4710,9 @@ type ProjectPermissions {
   createPipelineSchedule: Boolean!
 
   """
-  Whether or not a user can perform `create_project_snippet` on this resource
+  Whether or not a user can perform `create_snippet` on this resource
   """
-  createProjectSnippet: Boolean!
+  createSnippet: Boolean!
 
   """
   Whether or not a user can perform `create_wiki` on this resource
@@ -4882,6 +4917,61 @@ type Query {
     """
     fullPath: ID!
   ): Project
+
+  """
+  Find Snippets visible to the current user
+  """
+  snippets(
+    """
+    Returns the elements in the list that come after the specified cursor.
+    """
+    after: String
+
+    """
+    The ID of an author
+    """
+    authorId: ID
+
+    """
+    Returns the elements in the list that come before the specified cursor.
+    """
+    before: String
+
+    """
+    Explore personal snippets
+    """
+    explore: Boolean
+
+    """
+    Returns the first _n_ elements from the list.
+    """
+    first: Int
+
+    """
+    Array of global snippet ids, e.g., "gid://gitlab/ProjectSnippet/1"
+    """
+    ids: [ID!]
+
+    """
+    Returns the last _n_ elements from the list.
+    """
+    last: Int
+
+    """
+    The ID of a project
+    """
+    projectId: ID
+
+    """
+    The type of snippet
+    """
+    type: TypeEnum
+
+    """
+    The visibility of the snippet
+    """
+    visibility: VisibilityScopesEnum
+  ): SnippetConnection
 }
 
 """
@@ -5137,6 +5227,193 @@ enum SentryErrorStatus {
   UNRESOLVED
 }
 
+"""
+Represents a snippet entry
+"""
+type Snippet implements Noteable {
+  """
+  The owner of the snippet
+  """
+  author: User!
+
+  """
+  Content of the snippet
+  """
+  content: String!
+
+  """
+  Timestamp this snippet was created
+  """
+  createdAt: Time!
+
+  """
+  Description of the snippet
+  """
+  description: String
+
+  """
+  The GitLab Flavored Markdown rendering of `description`
+  """
+  descriptionHtml: String
+
+  """
+  All discussions on this noteable
+  """
+  discussions(
+    """
+    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
+
+    """
+    Returns the first _n_ elements from the list.
+    """
+    first: Int
+
+    """
+    Returns the last _n_ elements from the list.
+    """
+    last: Int
+  ): DiscussionConnection!
+
+  """
+  File Name of the snippet
+  """
+  fileName: String
+
+  """
+  Id of the snippet
+  """
+  id: ID!
+
+  """
+  All notes on this noteable
+  """
+  notes(
+    """
+    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
+
+    """
+    Returns the first _n_ elements from the list.
+    """
+    first: Int
+
+    """
+    Returns the last _n_ elements from the list.
+    """
+    last: Int
+  ): NoteConnection!
+
+  """
+  The project the snippet is associated with
+  """
+  project: Project
+
+  """
+  Raw URL of the snippet
+  """
+  rawUrl: String!
+
+  """
+  Title of the snippet
+  """
+  title: String!
+
+  """
+  Timestamp this snippet was updated
+  """
+  updatedAt: Time!
+
+  """
+  Permissions for the current user on the resource
+  """
+  userPermissions: SnippetPermissions!
+
+  """
+  Visibility of the snippet
+  """
+  visibility: String!
+
+  """
+  Web URL of the snippet
+  """
+  webUrl: String!
+}
+
+"""
+The connection type for Snippet.
+"""
+type SnippetConnection {
+  """
+  A list of edges.
+  """
+  edges: [SnippetEdge]
+
+  """
+  A list of nodes.
+  """
+  nodes: [Snippet]
+
+  """
+  Information to aid in pagination.
+  """
+  pageInfo: PageInfo!
+}
+
+"""
+An edge in a connection.
+"""
+type SnippetEdge {
+  """
+  A cursor for use in pagination.
+  """
+  cursor: String!
+
+  """
+  The item at the end of the edge.
+  """
+  node: Snippet
+}
+
+type SnippetPermissions {
+  """
+  Whether or not a user can perform `admin_snippet` on this resource
+  """
+  adminSnippet: Boolean!
+
+  """
+  Whether or not a user can perform `award_emoji` on this resource
+  """
+  awardEmoji: Boolean!
+
+  """
+  Whether or not a user can perform `create_note` on this resource
+  """
+  createNote: Boolean!
+
+  """
+  Whether or not a user can perform `read_snippet` on this resource
+  """
+  readSnippet: Boolean!
+
+  """
+  Whether or not a user can perform `update_snippet` on this resource
+  """
+  updateSnippet: Boolean!
+}
+
 type Submodule implements Entry {
   flatPath: String!
   id: ID!
@@ -5602,6 +5879,11 @@ type TreeEntryEdge {
   node: TreeEntry
 }
 
+enum TypeEnum {
+  personal
+  project
+}
+
 """
 Autogenerated input type of UpdateEpic
 """
@@ -5740,6 +6022,46 @@ type User {
   """
   name: String!
 
+  """
+  Snippets authored by the user
+  """
+  snippets(
+    """
+    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
+
+    """
+    Returns the first _n_ elements from the list.
+    """
+    first: Int
+
+    """
+    Array of global snippet ids, e.g., "gid://gitlab/ProjectSnippet/1"
+    """
+    ids: [ID!]
+
+    """
+    Returns the last _n_ elements from the list.
+    """
+    last: Int
+
+    """
+    The type of snippet
+    """
+    type: TypeEnum
+
+    """
+    The visibility of the snippet
+    """
+    visibility: VisibilityScopesEnum
+  ): SnippetConnection
+
   """
   Todos of the user
   """
@@ -5795,6 +6117,11 @@ type User {
     type: [TodoTargetEnum!]
   ): TodoConnection!
 
+  """
+  Permissions for the current user on the resource
+  """
+  userPermissions: UserPermissions!
+
   """
   Username of the user. Unique within this instance of GitLab
   """
@@ -5839,4 +6166,17 @@ type UserEdge {
   The item at the end of the edge.
   """
   node: User
+}
+
+type UserPermissions {
+  """
+  Whether or not a user can perform `create_snippet` on this resource
+  """
+  createSnippet: Boolean!
+}
+
+enum VisibilityScopesEnum {
+  internal
+  private
+  public
 }
\ No newline at end of file

doc/api/graphql/reference/index.md

@@ -689,7 +689,6 @@ The API can be explored interactively using the [GraphiQL IDE](../index.md#graph
 | `downloadCode` | Boolean! | Whether or not a user can perform `download_code` on this resource |
 | `downloadWikiCode` | Boolean! | Whether or not a user can perform `download_wiki_code` on this resource |
 | `forkProject` | Boolean! | Whether or not a user can perform `fork_project` on this resource |
-| `createProjectSnippet` | Boolean! | Whether or not a user can perform `create_project_snippet` on this resource |
 | `readCommitStatus` | Boolean! | Whether or not a user can perform `read_commit_status` on this resource |
 | `requestAccess` | Boolean! | Whether or not a user can perform `request_access` on this resource |
 | `createPipeline` | Boolean! | Whether or not a user can perform `create_pipeline` on this resource |
@@ -710,6 +709,7 @@ The API can be explored interactively using the [GraphiQL IDE](../index.md#graph
 | `destroyPages` | Boolean! | Whether or not a user can perform `destroy_pages` on this resource |
 | `readPagesContent` | Boolean! | Whether or not a user can perform `read_pages_content` on this resource |
 | `adminOperations` | Boolean! | Whether or not a user can perform `admin_operations` on this resource |
+| `createSnippet` | Boolean! | Whether or not a user can perform `create_snippet` on this resource |
 | `readDesign` | Boolean! | Whether or not a user can perform `read_design` on this resource |
 | `createDesign` | Boolean! | Whether or not a user can perform `create_design` on this resource |
 | `destroyDesign` | Boolean! | Whether or not a user can perform `destroy_design` on this resource |
@@ -787,6 +787,35 @@ The API can be explored interactively using the [GraphiQL IDE](../index.md#graph
 | `time` | Time! | Time the error frequency stats were recorded |
 | `count` | Int! | Count of errors received since the previously recorded time |
 
+### Snippet
+
+| Name  | Type  | Description |
+| ---   |  ---- | ----------  |
+| `userPermissions` | SnippetPermissions! | Permissions for the current user on the resource |
+| `id` | ID! | Id of the snippet |
+| `title` | String! | Title of the snippet |
+| `project` | Project | The project the snippet is associated with |
+| `author` | User! | The owner of the snippet |
+| `fileName` | String | File Name of the snippet |
+| `content` | String! | Content of the snippet |
+| `description` | String | Description of the snippet |
+| `visibility` | String! | Visibility of the snippet |
+| `createdAt` | Time! | Timestamp this snippet was created |
+| `updatedAt` | Time! | Timestamp this snippet was updated |
+| `webUrl` | String! | Web URL of the snippet |
+| `rawUrl` | String! | Raw URL of the snippet |
+| `descriptionHtml` | String | The GitLab Flavored Markdown rendering of `description` |
+
+### SnippetPermissions
+
+| Name  | Type  | Description |
+| ---   |  ---- | ----------  |
+| `createNote` | Boolean! | Whether or not a user can perform `create_note` on this resource |
+| `awardEmoji` | Boolean! | Whether or not a user can perform `award_emoji` on this resource |
+| `readSnippet` | Boolean! | Whether or not a user can perform `read_snippet` on this resource |
+| `updateSnippet` | Boolean! | Whether or not a user can perform `update_snippet` on this resource |
+| `adminSnippet` | Boolean! | Whether or not a user can perform `admin_snippet` on this resource |
+
 ### Submodule
 
 | Name  | Type  | Description |
@@ -892,7 +921,14 @@ The API can be explored interactively using the [GraphiQL IDE](../index.md#graph
 
 | Name  | Type  | Description |
 | ---   |  ---- | ----------  |
+| `userPermissions` | UserPermissions! | Permissions for the current user on the resource |
 | `name` | String! | Human-readable name of the user |
 | `username` | String! | Username of the user. Unique within this instance of GitLab |
 | `avatarUrl` | String! | URL of the user's avatar |
 | `webUrl` | String! | Web URL of the user |
+
+### UserPermissions
+
+| Name  | Type  | Description |
+| ---   |  ---- | ----------  |
+| `createSnippet` | Boolean! | Whether or not a user can perform `create_snippet` on this resource |

spec/graphql/resolvers/projects/snippets_resolver_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Resolvers::Projects::SnippetsResolver do
+  include GraphqlHelpers
+
+  describe '#resolve' do
+    let_it_be(:current_user) { create(:user) }
+    let_it_be(:other_user) { create(:user) }
+    let_it_be(:project) { create(:project) }
+
+    let_it_be(:personal_snippet) { create(:personal_snippet, :private, author: current_user) }
+    let_it_be(:project_snippet) { create(:project_snippet, :internal, author: current_user, project: project) }
+    let_it_be(:other_project_snippet) { create(:project_snippet, :public, author: other_user, project: project) }
+
+    before do
+      project.add_developer(current_user)
+    end
+
+    it 'calls SnippetsFinder' do
+      expect_next_instance_of(SnippetsFinder) do |finder|
+        expect(finder).to receive(:execute)
+      end
+
+      resolve_snippets
+    end
+
+    context 'when using no filter' do
+      it 'returns expected snippets' do
+        expect(resolve_snippets).to contain_exactly(project_snippet, other_project_snippet)
+      end
+    end
+
+    context 'when using filters' do
+      it 'returns the snippets by visibility' do
+        aggregate_failures do
+          expect(resolve_snippets(args: { visibility: 'are_private' })).to be_empty
+          expect(resolve_snippets(args: { visibility: 'are_internal' })).to contain_exactly(project_snippet)
+          expect(resolve_snippets(args: { visibility: 'are_public' })).to contain_exactly(other_project_snippet)
+        end
+      end
+
+      it 'returns the snippets by gid' do
+        snippets = resolve_snippets(args: { ids: project_snippet.to_global_id })
+
+        expect(snippets).to contain_exactly(project_snippet)
+      end
+
+      it 'returns the snippets by array of gid' do
+        args = {
+          ids: [project_snippet.to_global_id, other_project_snippet.to_global_id]
+        }
+
+        snippets = resolve_snippets(args: args)
+
+        expect(snippets).to contain_exactly(project_snippet, other_project_snippet)
+      end
+
+      it 'returns an error if the gid is invalid' do
+        expect do
+          resolve_snippets(args: { ids: 'foo' })
+        end.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
+      end
+    end
+
+    context 'when no project is provided' do
+      it 'returns no snippets' do
+        expect(resolve_snippets(obj: nil)).to be_empty
+      end
+    end
+
+    context 'when provided user is not current user' do
+      it 'returns no snippets' do
+        expect(resolve_snippets(context: { current_user: other_user }, args: { ids: project_snippet.to_global_id })).to be_empty
+      end
+    end
+  end
+
+  def resolve_snippets(args: {}, context: { current_user: current_user }, obj: project)
+    resolve(described_class, obj: obj, args: args, ctx: context)
+  end
+end

spec/graphql/resolvers/snippets_resolver_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Resolvers::SnippetsResolver do
+  include GraphqlHelpers
+
+  describe '#resolve' do
+    let_it_be(:current_user) { create(:user) }
+    let_it_be(:other_user) { create(:user) }
+    let_it_be(:project) { create(:project) }
+
+    let_it_be(:personal_snippet) { create(:personal_snippet, :private, author: current_user) }
+    let_it_be(:other_personal_snippet) { create(:personal_snippet, :internal, author: other_user) }
+    let_it_be(:project_snippet) { create(:project_snippet, :internal, author: current_user, project: project) }
+    let_it_be(:other_project_snippet) { create(:project_snippet, :public, author: other_user, project: project) }
+
+    before do
+      project.add_developer(current_user)
+    end
+
+    it 'calls SnippetsFinder' do
+      expect_next_instance_of(SnippetsFinder) do |finder|
+        expect(finder).to receive(:execute)
+      end
+
+      resolve_snippets
+    end
+
+    context 'when using no filter' do
+      it 'returns expected snippets' do
+        expect(resolve_snippets).to contain_exactly(personal_snippet, other_personal_snippet, project_snippet, other_project_snippet)
+      end
+    end
+
+    context 'when using filters' do
+      context 'by author id' do
+        it 'returns the snippets' do
+          snippets = resolve_snippets(args: { author_id: current_user.to_global_id })
+
+          expect(snippets).to contain_exactly(personal_snippet, project_snippet)
+        end
+
+        it 'returns an error if the param id is invalid' do
+          expect do
+            resolve_snippets(args: { author_id: 'foo' })
+          end.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
+        end
+      end
+
+      it 'returns the snippets by type' do
+        aggregate_failures do
+          expect(resolve_snippets(args: { type: 'personal' })).to contain_exactly(personal_snippet, other_personal_snippet)
+          expect(resolve_snippets(args: { type: 'project' })).to contain_exactly(project_snippet, other_project_snippet)
+        end
+      end
+
+      context 'by project id' do
+        it 'returns the snippets' do
+          snippets = resolve_snippets(args: { project_id: project.to_global_id })
+
+          expect(snippets).to contain_exactly(project_snippet, other_project_snippet)
+        end
+
+        it 'returns an error if the param id is invalid' do
+          expect do
+            resolve_snippets(args: { project_id: 'foo' })
+          end.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
+        end
+      end
+
+      it 'returns the snippets by visibility' do
+        aggregate_failures do
+          expect(resolve_snippets(args: { visibility: 'are_private' })).to contain_exactly(personal_snippet)
+          expect(resolve_snippets(args: { visibility: 'are_internal' })).to contain_exactly(project_snippet, other_personal_snippet)
+          expect(resolve_snippets(args: { visibility: 'are_public' })).to contain_exactly(other_project_snippet)
+        end
+      end
+
+      it 'returns snippets to explore' do
+        snippets = resolve_snippets(args: { explore: true })
+
+        expect(snippets).to contain_exactly(other_personal_snippet)
+      end
+
+      it 'returns the snippets by single gid' do
+        snippets = resolve_snippets(args: { ids: personal_snippet.to_global_id })
+
+        expect(snippets).to contain_exactly(personal_snippet)
+      end
+
+      it 'returns the snippets by array of gid' do
+        args = {
+          ids: [personal_snippet.to_global_id, project_snippet.to_global_id]
+        }
+
+        snippets = resolve_snippets(args: args)
+
+        expect(snippets).to contain_exactly(personal_snippet, project_snippet)
+      end
+
+      it 'returns an error if the gid is invalid' do
+        args = {
+          ids: [personal_snippet.to_global_id, 'foo']
+        }
+
+        expect do
+          resolve_snippets(args: args)
+        end.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
+      end
+
+      it 'returns an error if both project and author are provided' do
+        expect do
+          args = {
+            author_id: current_user.to_global_id,
+            project_id: project.to_global_id
+          }
+
+          resolve_snippets(args: args)
+        end.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
+      end
+    end
+  end
+
+  def resolve_snippets(args: {})
+    resolve(described_class, obj: nil, args: args, ctx: { current_user: current_user })
+  end
+end

spec/graphql/resolvers/users/snippets_resolver_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Resolvers::Users::SnippetsResolver do
+  include GraphqlHelpers
+
+  describe '#resolve' do
+    let_it_be(:current_user) { create(:user) }
+    let_it_be(:other_user) { create(:user) }
+    let_it_be(:project) { create(:project) }
+
+    let_it_be(:private_personal_snippet) { create(:personal_snippet, :private, author: current_user) }
+    let_it_be(:public_personal_snippet) { create(:personal_snippet, :public, author: current_user) }
+    let_it_be(:other_personal_snippet) { create(:personal_snippet, :internal, author: other_user) }
+    let_it_be(:internal_project_snippet) { create(:project_snippet, :internal, author: current_user, project: project) }
+    let_it_be(:other_project_snippet) { create(:project_snippet, :public, author: other_user, project: project) }
+
+    before do
+      project.add_developer(current_user)
+    end
+
+    it 'calls SnippetsFinder' do
+      expect_next_instance_of(SnippetsFinder) do |finder|
+        expect(finder).to receive(:execute)
+      end
+
+      resolve_snippets
+    end
+
+    context 'when using no filter' do
+      it 'returns expected authored snippets' do
+        expect(resolve_snippets).to contain_exactly(private_personal_snippet, public_personal_snippet, internal_project_snippet)
+      end
+    end
+
+    context 'when using filters' do
+      it 'returns the snippets by visibility' do
+        aggregate_failures do
+          expect(resolve_snippets(args: { visibility: 'are_private' })).to contain_exactly(private_personal_snippet)
+          expect(resolve_snippets(args: { visibility: 'are_internal' })).to contain_exactly(internal_project_snippet)
+          expect(resolve_snippets(args: { visibility: 'are_public' })).to contain_exactly(public_personal_snippet)
+        end
+      end
+
+      it 'returns the snippets by type' do
+        aggregate_failures do
+          expect(resolve_snippets(args: { type: 'personal' })).to contain_exactly(private_personal_snippet, public_personal_snippet)
+          expect(resolve_snippets(args: { type: 'project' })).to contain_exactly(internal_project_snippet)
+        end
+      end
+
+      it 'returns the snippets by single gid' do
+        snippets = resolve_snippets(args: { ids: private_personal_snippet.to_global_id })
+
+        expect(snippets).to contain_exactly(private_personal_snippet)
+      end
+
+      it 'returns the snippets by array of gid' do
+        args = {
+          ids: [private_personal_snippet.to_global_id, public_personal_snippet.to_global_id]
+        }
+
+        snippets = resolve_snippets(args: args)
+
+        expect(snippets).to contain_exactly(private_personal_snippet, public_personal_snippet)
+      end
+
+      it 'returns an error if the gid is invalid' do
+        args = {
+          ids: [private_personal_snippet.to_global_id, 'foo']
+        }
+
+        expect do
+          resolve_snippets(args: args)
+        end.to raise_error(Gitlab::Graphql::Errors::ArgumentError)
+      end
+    end
+  end
+
+  def resolve_snippets(args: {})
+    resolve(described_class, args: args, ctx: { current_user: current_user }, obj: current_user)
+  end
+end

spec/graphql/types/permission_types/project_spec.rb

@@ -8,7 +8,7 @@ describe Types::PermissionTypes::Project do
       :change_namespace, :change_visibility_level, :rename_project, :remove_project, :archive_project,
       :remove_fork_project, :remove_pages, :read_project, :create_merge_request_in,
       :read_wiki, :read_project_member, :create_issue, :upload_file, :read_cycle_analytics,
-      :download_code, :download_wiki_code, :fork_project, :create_project_snippet,
+      :download_code, :download_wiki_code, :fork_project, :create_snippet,
       :read_commit_status, :request_access, :create_pipeline, :create_pipeline_schedule,
       :create_merge_request_from, :create_wiki, :push_code, :create_deployment, :push_to_delete_protected_branch,
       :admin_wiki, :admin_project, :update_pages, :admin_remote_mirror, :create_label,

spec/graphql/types/permission_types/snippet_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Types::PermissionTypes::Snippet do
+  it 'returns the snippets permissions' do
+    expected_permissions = [
+      :create_note, :award_emoji, :read_snippet, :update_snippet, :admin_snippet
+    ]
+
+    expected_permissions.each do |permission|
+      expect(described_class).to have_graphql_field(permission)
+    end
+  end
+end

spec/graphql/types/permission_types/user_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Types::PermissionTypes::User do
+  it 'returns user permissions' do
+    expected_permissions = [
+      :create_snippet
+    ]
+
+    expected_permissions.each do |permission|
+      expect(described_class).to have_graphql_field(permission)
+    end
+  end
+end

spec/graphql/types/project_type_spec.rb

@@ -22,7 +22,7 @@ describe GitlabSchema.types['Project'] do
       only_allow_merge_if_pipeline_succeeds request_access_enabled
       only_allow_merge_if_all_discussions_are_resolved printing_merge_request_link_enabled
       namespace group statistics repository merge_requests merge_request issues
-      issue pipelines removeSourceBranchAfterMerge sentryDetailedError
+      issue pipelines removeSourceBranchAfterMerge sentryDetailedError snippets
     ]
 
     is_expected.to have_graphql_fields(*expected_fields)
@@ -63,4 +63,13 @@ describe GitlabSchema.types['Project'] do
       is_expected.to have_graphql_resolver(Resolvers::MergeRequestsResolver)
     end
   end
+
+  describe 'snippets field' do
+    subject { described_class.fields['snippets'] }
+
+    it 'returns snippets' do
+      is_expected.to have_graphql_type(Types::SnippetType.connection_type)
+      is_expected.to have_graphql_resolver(Resolvers::Projects::SnippetsResolver)
+    end
+  end
 end

spec/graphql/types/query_type_spec.rb

@@ -7,7 +7,7 @@ describe GitlabSchema.types['Query'] do
     expect(described_class.graphql_name).to eq('Query')
   end
 
-  it { is_expected.to have_graphql_fields(:project, :namespace, :group, :echo, :metadata, :current_user) }
+  it { is_expected.to have_graphql_fields(:project, :namespace, :group, :echo, :metadata, :current_user, :snippets) }
 
   describe 'namespace field' do
     subject { described_class.fields['namespace'] }

spec/graphql/types/snippet_type_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe GitlabSchema.types['Snippet'] do
+  it 'has the correct fields' do
+    expected_fields = [:id, :title, :project, :author,
+                       :file_name, :content, :description,
+                       :visibility, :created_at, :updated_at,
+                       :web_url, :raw_url, :notes, :discussions,
+                       :user_permissions, :description_html]
+
+    is_expected.to have_graphql_fields(*expected_fields)
+  end
+
+  describe 'authorizations' do
+    it { expect(described_class).to require_graphql_authorizations(:read_snippet) }
+  end
+end

spec/graphql/types/user_type_spec.rb

@@ -6,4 +6,21 @@ describe GitlabSchema.types['User'] do
   it { expect(described_class.graphql_name).to eq('User') }
 
   it { expect(described_class).to require_graphql_authorizations(:read_user) }
+
+  it 'has the expected fields' do
+    expected_fields = %w[
+      user_permissions snippets name username avatarUrl webUrl todos
+    ]
+
+    is_expected.to have_graphql_fields(*expected_fields)
+  end
+
+  describe 'snippets field' do
+    subject { described_class.fields['snippets'] }
+
+    it 'returns snippets' do
+      is_expected.to have_graphql_type(Types::SnippetType.connection_type)
+      is_expected.to have_graphql_resolver(Resolvers::Users::SnippetsResolver)
+    end
+  end
 end

spec/presenters/snippet_presenter_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe SnippetPresenter do
+  include Gitlab::Routing.url_helpers
+
+  let_it_be(:user) { create(:user) }
+  let_it_be(:personal_snippet) { create(:personal_snippet, author: user) }
+  let_it_be(:project_snippet) { create(:project_snippet, author: user) }
+
+  let(:project) { project_snippet.project }
+  let(:presenter) { described_class.new(snippet, current_user: user) }
+
+  before do
+    project.add_developer(user)
+  end
+
+  describe '#web_url' do
+    subject { presenter.web_url }
+
+    context 'with PersonalSnippet' do
+      let(:snippet) { personal_snippet }
+
+      it 'returns snippet web url' do
+        expect(subject).to match "/snippets/#{snippet.id}"
+      end
+    end
+
+    context 'with ProjectSnippet' do
+      let(:snippet) { project_snippet }
+
+      it 'returns snippet web url' do
+        expect(subject).to match "/#{project.full_path}/snippets/#{snippet.id}"
+      end
+    end
+  end
+
+  describe '#raw_url' do
+    subject { presenter.raw_url }
+
+    context 'with PersonalSnippet' do
+      let(:snippet) { personal_snippet }
+
+      it 'returns snippet web url' do
+        expect(subject).to match "/snippets/#{snippet.id}/raw"
+      end
+    end
+
+    context 'with ProjectSnippet' do
+      let(:snippet) { project_snippet }
+
+      it 'returns snippet web url' do
+        expect(subject).to match "/#{project.full_path}/snippets/#{snippet.id}/raw"
+      end
+    end
+  end
+
+  describe '#can_read_snippet?' do
+    subject { presenter.can_read_snippet? }
+
+    context 'with PersonalSnippet' do
+      let(:snippet) { personal_snippet }
+
+      it 'checks read_personal_snippet' do
+        expect(presenter).to receive(:can?).with(user, :read_personal_snippet, snippet)
+
+        subject
+      end
+    end
+
+    context 'with ProjectSnippet' do
+      let(:snippet) { project_snippet }
+
+      it 'checks read_project_snippet ' do
+        expect(presenter).to receive(:can?).with(user, :read_project_snippet, snippet)
+
+        subject
+      end
+    end
+  end
+
+  describe '#can_update_snippet?' do
+    subject { presenter.can_update_snippet? }
+
+    context 'with PersonalSnippet' do
+      let(:snippet) { personal_snippet }
+
+      it 'checks update_personal_snippet' do
+        expect(presenter).to receive(:can?).with(user, :update_personal_snippet, snippet)
+
+        subject
+      end
+    end
+
+    context 'with ProjectSnippet' do
+      let(:snippet) { project_snippet }
+
+      it 'checks update_project_snippet ' do
+        expect(presenter).to receive(:can?).with(user, :update_project_snippet, snippet)
+
+        subject
+      end
+    end
+  end
+
+  describe '#can_admin_snippet?' do
+    subject { presenter.can_admin_snippet? }
+
+    context 'with PersonalSnippet' do
+      let(:snippet) { personal_snippet }
+
+      it 'checks admin_personal_snippet' do
+        expect(presenter).to receive(:can?).with(user, :admin_personal_snippet, snippet)
+
+        subject
+      end
+    end
+
+    context 'with ProjectSnippet' do
+      let(:snippet) { project_snippet }
+
+      it 'checks admin_project_snippet ' do
+        expect(presenter).to receive(:can?).with(user, :admin_project_snippet, snippet)
+
+        subject
+      end
+    end
+  end
+end