ensure array mutations return array, add arrayPendingState and clearDiskStatistics

Signed-off-by: Alexis Tyler <xo@wvvw.me>

app/graphql/schema/types/array/array.graphql

@@ -4,9 +4,9 @@ type Query {
 
 type Mutation {
     """Start array"""
-    startArray: JSON @func(module: "array/update-array", data: { state: "start" })
+    startArray: Array @func(module: "array/update-array", data: { state: "start" })
     """Stop array"""
-    stopArray: JSON @func(module: "array/update-array", data: { state: "stop" })
+    stopArray: Array @func(module: "array/update-array", data: { state: "stop" })
 
     """Add new disk to array"""
     addDiskToArray(input: arrayDiskInput): Array @func(module: "array/add-disk")
@@ -20,6 +20,11 @@ input arrayDiskInput {
 }
 
 type Array {
+    """Array state before this query/mutation"""
+    previousState: ArrayState
+    """Array state after this query/mutation"""
+    pendingState: ArrayPendingState
+    """Current array state"""
     state: ArrayState!
     """Current array capacity"""
     capacity: ArrayCapacity!
@@ -34,6 +39,13 @@ enum ArrayState {
     stopped
 }
 
+enum ArrayPendingState {
+    """Array is starting"""
+    starting
+    """Array is stopping"""
+    stopping
+}
+
 type ArrayCapacity {
     bytes: Capacity
     disks: Capacity

app/graphql/schema/types/disks/disk.graphql

@@ -8,6 +8,8 @@ type Query {
 type Mutation {
     mountDisk(id: String!): Disk
     unmountDisk(id: String!): Disk
+
+    clearDiskStatistics(id: String!): JSON
 }
 
 type Disk {