Update schema

schema.graphql

@@ -190,24 +190,6 @@ enum BasicKnowledgeType {
   INTERDISCIPLINARY
 }
 
-type BookNode implements Node {
-  title: String!
-  slug: String!
-  id: ID!
-  pk: Int
-  topics(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, slug_Icontains: String, slug_In: [String], title: String, title_Icontains: String, title_In: [String]): TopicNodeConnection
-}
-
-type BookNodeConnection {
-  pageInfo: PageInfo!
-  edges: [BookNodeEdge]!
-}
-
-type BookNodeEdge {
-  node: BookNode
-  cursor: String!
-}
-
 type ChapterBookmarkNode implements Node {
   user: UserNode!
   note: NoteNode
@@ -225,7 +207,11 @@ type ChapterBookmarkNodeEdge {
   cursor: String!
 }
 
-type ChapterNode implements Node {
+interface ChapterInterface {
+  contentBlocks(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, title: String): ContentBlockNodeConnection
+}
+
+type ChapterNode implements Node, ChapterInterface {
   title: String!
   slug: String!
   description: String!
@@ -347,6 +333,18 @@ type CreateSchoolClassPayload {
   clientMutationId: String
 }
 
+input CreateSnapshotInput {
+  module: ID!
+  selectedClass: ID!
+  clientMutationId: String
+}
+
+type CreateSnapshotPayload {
+  snapshot: SnapshotNode
+  success: Boolean
+  clientMutationId: String
+}
+
 input CreateTeamInput {
   name: String!
   clientMutationId: String
@@ -408,6 +406,7 @@ type CustomMutation {
   updateLastTopic(input: UpdateLastTopicInput!): UpdateLastTopicPayload
   updateChapterVisibility(input: UpdateChapterVisibilityInput!): UpdateChapterVisibilityPayload
   syncModuleVisibility(input: SyncModuleVisibilityInput!): SyncModuleVisibilityPayload
+  createSnapshot(input: CreateSnapshotInput!): CreateSnapshotPayload
   _debug: DjangoDebug
 }
 
@@ -422,14 +421,12 @@ type CustomQuery {
   assignment(id: ID!): AssignmentNode
   assignments(offset: Int, before: String, after: String, first: Int, last: Int): AssignmentNodeConnection
   node(id: ID!): Node
-  book(id: ID!): BookNode
   topic(slug: String): TopicNode
   module(slug: String, id: ID): ModuleNode
   chapter(id: ID!): ChapterNode
   contentBlock(id: ID!): ContentBlockNode
-  books(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, slug_Icontains: String, slug_In: [String], title: String, title_Icontains: String, title_In: [String]): BookNodeConnection
-  topics(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, slug_Icontains: String, slug_In: [String], title: String, title_Icontains: String, title_In: [String]): TopicNodeConnection
-  modules(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, slug_Icontains: String, slug_In: [String], title: String, title_Icontains: String, title_In: [String]): ModuleNodeConnection
+  topics(before: String, after: String, first: Int, last: Int): TopicConnection
+  modules(before: String, after: String, first: Int, last: Int): ModuleConnection
   chapters(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, title: String): ChapterNodeConnection
   objectiveGroup(id: ID!): ObjectiveGroupNode
   objectiveGroups(offset: Int, before: String, after: String, first: Int, last: Int, title: String, module_Slug: String): ObjectiveGroupNodeConnection
@@ -614,7 +611,22 @@ type ModuleBookmarkNode {
   module: ModuleNode!
 }
 
-type ModuleNode implements Node {
+type ModuleConnection {
+  pageInfo: PageInfo!
+  edges: [ModuleEdge]!
+  nodes: [ModuleNode]
+}
+
+type ModuleEdge {
+  node: ModuleNode
+  cursor: String!
+}
+
+interface ModuleInterface {
+  pk: Int
+}
+
+type ModuleNode implements Node, ModuleInterface {
   title: String!
   slug: String!
   metaTitle: String!
@@ -853,6 +865,35 @@ type SchoolClassNodeEdge {
   cursor: String!
 }
 
+type SnapshotChapterNode implements Node, ChapterInterface {
+  id: ID!
+  chapter: ChapterNode!
+  snapshot: SnapshotNode!
+  titleHidden: Boolean
+  descriptionHidden: Boolean
+  contentBlocks(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, title: String): ContentBlockNodeConnection
+  title: String
+  description: String
+}
+
+type SnapshotChapterNodeConnection {
+  pageInfo: PageInfo!
+  edges: [SnapshotChapterNodeEdge]!
+}
+
+type SnapshotChapterNodeEdge {
+  node: SnapshotChapterNode
+  cursor: String!
+}
+
+type SnapshotNode implements Node {
+  id: ID!
+  module: ModuleNode!
+  chapters(offset: Int, before: String, after: String, first: Int, last: Int, id: ID): SnapshotChapterNodeConnection
+  hiddenContentBlocks(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, title: String): ContentBlockNodeConnection!
+  chapterSnapshots(offset: Int, before: String, after: String, first: Int, last: Int, id: ID): SnapshotChapterNodeConnection!
+}
+
 input SpellCheckInput {
   text: String!
   assignment: ID!
@@ -955,6 +996,17 @@ type TeamNode implements Node {
   pk: Int
 }
 
+type TopicConnection {
+  pageInfo: PageInfo!
+  edges: [TopicEdge]!
+  nodes: [TopicNode]
+}
+
+type TopicEdge {
+  node: TopicNode
+  cursor: String!
+}
+
 type TopicNode implements Node {
   title: String!
   slug: String!
@@ -968,16 +1020,6 @@ type TopicNode implements Node {
   modules(offset: Int, before: String, after: String, first: Int, last: Int, slug: String, slug_Icontains: String, slug_In: [String], title: String, title_Icontains: String, title_In: [String]): ModuleNodeConnection
 }
 
-type TopicNodeConnection {
-  pageInfo: PageInfo!
-  edges: [TopicNodeEdge]!
-}
-
-type TopicNodeEdge {
-  node: TopicNode
-  cursor: String!
-}
-
 scalar UUID
 
 input UpdateAnswerArgument {