graph2: Added change type and query.

graph2/schema/root.gql

@@ -54,6 +54,10 @@ type Query {
   files(filter: FilesFilter): [File!]!
 
 
+  # Find changes
+  changes(filter: ChangesFilter): [Change!]!
+
+
   # Get information about the token, useful for debugging.
   token: Token!
 }

graph2/schema/types/Change.gql

@@ -0,0 +1,81 @@
+"""
+A change represents a a change in the history.
+"""
+type Change {
+  "A unique ID of the change."
+  id: String!
+
+  "The model of the changed object."
+  model: ChangeModel!
+
+  "The operation performed."
+  op: String!
+
+  "The author that performed the change."
+  author: String!
+
+  "Whether the change will be listed without a matching key."
+  listed: Boolean!
+
+  "The keys indexing this change."
+  keys: [ChangeKey!]!
+
+  "The date when the change happened."
+  date: Date
+
+  "The changed objects."
+  objects: [ChangeObject!]!
+}
+
+union ChangeObject = Character | Channel | Log | Post | Story | Tag | Chapter
+
+"""
+A change key is a key associated with a change, used for filtering
+and subscription. A log post edit has keys for both the log and post,
+making it suitable to use it to patch an active log file.
+"""
+type ChangeKey {
+  "The model the key is for."
+  model: ChangeModel!
+
+  "The model's id, or * if it's a key indicating a model list should be updated."
+  id: String!
+}
+
+"""
+See ChangeKey
+"""
+input ChangeKeyInput {
+  "The model the key is for."
+  model: ChangeModel!
+
+  "The model's id, or * if it's a key indicating a model list should be updated."
+  id: String!
+}
+
+"""
+A model related to the change.
+"""
+enum ChangeModel {
+  Character
+  Channel
+  Log
+  Post
+  Story
+  Tag
+  Chapter
+}
+
+"""
+Optional filter for the changes query.
+"""
+input ChangesFilter {
+  "The keys to query for."
+  keys: [ChangeKeyInput!]
+
+  "Only show changes more recent than this date."
+  earliestDate: Date
+
+  "Limit the amount of results."
+  limit: Int
+}