graphvent/gql_graph.go

package graphvent

import (
  "github.com/graphql-go/graphql"
  "reflect"
  "fmt"
)

var gql_interface_graph_node *graphql.Interface = nil
func GQLInterfaceGraphNode() *graphql.Interface {
  if gql_interface_graph_node == nil {
    gql_interface_graph_node = graphql.NewInterface(graphql.InterfaceConfig{
      Name: "GraphNode",
      ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
        ctx, ok := p.Context.Value("graph_context").(*GraphContext)
        if ok == false {
          return nil
        }
        valid_nodes, ok := p.Context.Value("valid_nodes").(map[reflect.Type]*graphql.Object)
        if ok == false {
          ctx.Log.Logf("gql", "Failed to get valid_nodes from Context")
          return nil
        }

        node_type, ok := p.Context.Value("node_type").(*reflect.Type)
        if ok == false {
          ctx.Log.Logf("gql", "Failed to get node_type from Context: %+v", p.Context.Value("node_type"))
          return nil
        }

        p_type := reflect.TypeOf(p.Value)

        for key, value := range(valid_nodes) {
          if p_type == key {
            return value
          }
        }

        if p_type.Implements(*node_type) {
          return GQLTypeBaseNode()
        }

        return nil
      },
      Fields: graphql.Fields{},
    })

    gql_interface_graph_node.AddFieldConfig("ID", &graphql.Field{
      Type: graphql.String,
    })

    gql_interface_graph_node.AddFieldConfig("Name", &graphql.Field{
      Type: graphql.String,
    })
  }

  return gql_interface_graph_node
}

var gql_list_thread *graphql.List = nil
func GQLListThread() *graphql.List {
  if gql_list_thread == nil {
    gql_list_thread = graphql.NewList(GQLInterfaceThread())
  }
  return gql_list_thread
}

var gql_interface_thread *graphql.Interface = nil
func GQLInterfaceThread() *graphql.Interface {
  if gql_interface_thread == nil {
    gql_interface_thread = graphql.NewInterface(graphql.InterfaceConfig{
      Name: "Thread",
      ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
        ctx, ok := p.Context.Value("graph_context").(*GraphContext)
        if ok == false {
          return nil
        }
        valid_threads, ok := p.Context.Value("valid_threads").(map[reflect.Type]*graphql.Object)
        if ok == false {
          ctx.Log.Logf("gql", "Failed to get valid_threads from Context")
          return nil
        }

        thread_type, ok := p.Context.Value("thread_type").(*reflect.Type)
        if ok == false {
          ctx.Log.Logf("gql", "Failed to get thread_type from Context: %+v", p.Context.Value("thread_type"))
          return nil
        }

        p_type := reflect.TypeOf(p.Value)


        for key, value := range(valid_threads) {
          if p_type == key {
            return value
          }
        }

        if p_type.Implements(*thread_type) {
          return GQLTypeBaseThread()
        }

        ctx.Log.Logf("gql", "Found no type that matches %+v: %+v", p_type, p_type.Implements(*thread_type))

        return nil
      },
      Fields: graphql.Fields{},
    })

    gql_interface_thread.AddFieldConfig("ID", &graphql.Field{
      Type: graphql.String,
    })

    gql_interface_thread.AddFieldConfig("Name", &graphql.Field{
      Type: graphql.String,
    })

    gql_interface_thread.AddFieldConfig("Children", &graphql.Field{
      Type: GQLListThread(),
    })

    gql_interface_thread.AddFieldConfig("Parent", &graphql.Field{
      Type: GQLInterfaceThread(),
    })
  }

  return gql_interface_thread
}

var gql_list_lockable *graphql.List = nil
func GQLListLockable() *graphql.List {
  if gql_list_lockable == nil {
    gql_list_lockable = graphql.NewList(GQLInterfaceLockable())
  }
  return gql_list_lockable
}

var gql_interface_lockable *graphql.Interface = nil
func GQLInterfaceLockable() *graphql.Interface {
  if gql_interface_lockable == nil {
    gql_interface_lockable = graphql.NewInterface(graphql.InterfaceConfig{
      Name: "Lockable",
      ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
        ctx, ok := p.Context.Value("graph_context").(*GraphContext)
        if ok == false {
          return nil
        }
        valid_lockables, ok := p.Context.Value("valid_lockables").(map[reflect.Type]*graphql.Object)
        if ok == false {
          ctx.Log.Logf("gql", "Failed to get valid_lockables from Context")
          return nil
        }

        lockable_type, ok := p.Context.Value("lockable_type").(*reflect.Type)
        if ok == false {
          ctx.Log.Logf("gql", "Failed to get lockable_type from Context: %+v", p.Context.Value("lockable_type"))
          return nil
        }

        p_type := reflect.TypeOf(p.Value)

        for key, value := range(valid_lockables) {
          if p_type == key {
            return value
          }
        }

        if p_type.Implements(*lockable_type) {
          return GQLTypeBaseLockable()
        }
        return nil
      },
      Fields: graphql.Fields{},
    })

    gql_interface_lockable.AddFieldConfig("ID", &graphql.Field{
      Type: graphql.String,
    })

    gql_interface_lockable.AddFieldConfig("Name", &graphql.Field{
      Type: graphql.String,
    })

    if gql_list_lockable == nil {
      gql_list_lockable = graphql.NewList(gql_interface_lockable)
    }

    gql_interface_lockable.AddFieldConfig("Requirements", &graphql.Field{
      Type: GQLListLockable(),
    })

    gql_interface_lockable.AddFieldConfig("Dependencies", &graphql.Field{
      Type: GQLListLockable(),
    })

    gql_interface_lockable.AddFieldConfig("Owner", &graphql.Field{
      Type: GQLInterfaceLockable(),
    })

  }

  return gql_interface_lockable
}

func GQLNodeID(p graphql.ResolveParams) (interface{}, error) {
  node, ok := p.Source.(GraphNode)
  if ok == false || node == nil {
    return nil, fmt.Errorf("Failed to cast source to GraphNode")
  }
  return node.ID(), nil
}

func GQLNodeName(p graphql.ResolveParams) (interface{}, error) {
  node, ok := p.Source.(GraphNode)
  if ok == false || node == nil {
    return nil, fmt.Errorf("Failed to cast source to GraphNode")
  }

  ctx, ok := p.Context.Value("graph_context").(*GraphContext)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast context graph_context to GraphContext")
  }

  name, err := UseStates(ctx, []GraphNode{node}, func(states []NodeState) (interface{}, error) {
    return states[0].Name(), nil
  })

  if err != nil {
    return nil, err
  }

  name_str, ok := name.(string)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast name to string %+v", name)
  }

  return name_str, nil
}

func GQLThreadListen(p graphql.ResolveParams) (interface{}, error) {
  node, ok := p.Source.(*GQLThread)
  if ok == false || node == nil {
    return nil, fmt.Errorf("Failed to cast source to GQLThread")
  }

  ctx, ok := p.Context.Value("graph_context").(*GraphContext)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast context graph_context to GraphContext")
  }

  listen, err := UseStates(ctx, []GraphNode{node}, func(states []NodeState) (interface{}, error) {
    gql_thread, ok := states[0].(*GQLThreadState)
    if ok == false {
      return nil, fmt.Errorf("Failed to cast state to GQLThreadState")
    }
    return gql_thread.Listen, nil
  })

  if err != nil {
    return nil, err
  }

  listen_str, ok := listen.(string)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast listen to string %+v", listen)
  }

  return listen_str, nil
}

func GQLThreadParent(p graphql.ResolveParams) (interface{}, error) {
  node, ok := p.Source.(Thread)
  if ok == false || node == nil {
    return nil, fmt.Errorf("Failed to cast source to Thread")
  }

  ctx, ok := p.Context.Value("graph_context").(*GraphContext)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast context graph_context to GraphContext")
  }

  parent, err := UseStates(ctx, []GraphNode{node}, func(states []NodeState) (interface{}, error) {
    gql_thread, ok := states[0].(ThreadState)
    if ok == false {
      return nil, fmt.Errorf("Failed to cast state to ThreadState")
    }
    return gql_thread.Parent(), nil
  })

  if err != nil {
    return nil, err
  }

  parent_node, ok := parent.(Thread)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast parent to node %+v", parent)
  }

  return parent_node, nil
}

func GQLThreadChildren(p graphql.ResolveParams) (interface{}, error) {
  node, ok := p.Source.(Thread)
  if ok == false || node == nil {
    return nil, fmt.Errorf("Failed to cast source to Thread")
  }

  ctx, ok := p.Context.Value("graph_context").(*GraphContext)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast context graph_context to GraphContext")
  }

  children, err := UseStates(ctx, []GraphNode{node}, func(states []NodeState) (interface{}, error) {
    gql_thread, ok := states[0].(ThreadState)
    if ok == false {
      return nil, fmt.Errorf("Failed to cast state to ThreadState")
    }
    return gql_thread.Children(), nil
  })

  if err != nil {
    return nil, err
  }

  children_nodes, ok := children.([]Thread)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast children to threads %+v", children)
  }

  return children_nodes, nil
}

func GQLLockableRequirements(p graphql.ResolveParams) (interface{}, error) {
  node, ok := p.Source.(Lockable)
  if ok == false || node == nil {
    return nil, fmt.Errorf("Failed to cast source to Lockable")
  }

  ctx, ok := p.Context.Value("graph_context").(*GraphContext)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast context graph_context to GraphContext")
  }

  requirements, err := UseStates(ctx, []GraphNode{node}, func(states []NodeState) (interface{}, error) {
    gql_thread, ok := states[0].(LockableState)
    if ok == false {
      return nil, fmt.Errorf("Failed to cast state to LockableState")
    }
    return gql_thread.Requirements(), nil
  })

  if err != nil {
    return nil, err
  }

  requirement_nodes, ok := requirements.([]Lockable)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast requirements to lockables %+v", requirements)
  }

  return requirement_nodes, nil
}

func GQLLockableDependencies(p graphql.ResolveParams) (interface{}, error) {
  node, ok := p.Source.(Lockable)
  if ok == false || node == nil {
    return nil, fmt.Errorf("Failed to cast source to Lockable")
  }

  ctx, ok := p.Context.Value("graph_context").(*GraphContext)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast context graph_context to GraphContext")
  }

  dependencies, err := UseStates(ctx, []GraphNode{node}, func(states []NodeState) (interface{}, error) {
    gql_thread, ok := states[0].(LockableState)
    if ok == false {
      return nil, fmt.Errorf("Failed to cast state to LockableState")
    }
    return gql_thread.Dependencies(), nil
  })

  if err != nil {
    return nil, err
  }

  dependency_nodes, ok := dependencies.([]Lockable)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast dependencies to lockables %+v", dependencies)
  }

  return dependency_nodes, nil
}

func GQLLockableOwner(p graphql.ResolveParams) (interface{}, error) {
  node, ok := p.Source.(Lockable)
  if ok == false || node == nil {
    return nil, fmt.Errorf("Failed to cast source to Lockable")
  }

  ctx, ok := p.Context.Value("graph_context").(*GraphContext)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast context graph_context to GraphContext")
  }

  owner, err := UseStates(ctx, []GraphNode{node}, func(states []NodeState) (interface{}, error) {
    gql_thread, ok := states[0].(LockableState)
    if ok == false {
      return nil, fmt.Errorf("Failed to cast state to LockableState")
    }
    return gql_thread.Owner(), nil
  })

  if err != nil {
    return nil, err
  }

  // TODO actually cast to LockHolder and add gql interface for it
  owner_node, ok := owner.(Lockable)
  if ok == false {
    return nil, fmt.Errorf("Failed to cast owner to Lockable %+v", owner)
  }

  return owner_node, nil
}


var gql_type_gql_thread *graphql.Object = nil
func GQLTypeGQLThread() * graphql.Object {
  if gql_type_gql_thread == nil {
    gql_type_gql_thread = graphql.NewObject(graphql.ObjectConfig{
      Name: "GQLThread",
      Interfaces: []*graphql.Interface{
        GQLInterfaceGraphNode(),
        GQLInterfaceThread(),
        GQLInterfaceLockable(),
      },
      IsTypeOf: func(p graphql.IsTypeOfParams) bool {
        _, ok := p.Value.(*GQLThread)
        return ok
      },
      Fields: graphql.Fields{},
    })

    gql_type_gql_thread.AddFieldConfig("ID", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLNodeID,
    })

    gql_type_gql_thread.AddFieldConfig("Name", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLNodeName,
    })

    gql_type_gql_thread.AddFieldConfig("Children", &graphql.Field{
      Type: GQLListThread(),
      Resolve: GQLThreadChildren,
    })

    gql_type_gql_thread.AddFieldConfig("Parent", &graphql.Field{
      Type: GQLInterfaceThread(),
      Resolve: GQLThreadParent,
    })

    gql_type_gql_thread.AddFieldConfig("Listen", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLThreadListen,
    })

    gql_type_gql_thread.AddFieldConfig("Requirements", &graphql.Field{
      Type: GQLListLockable(),
      Resolve: GQLLockableRequirements,
    })

    gql_type_gql_thread.AddFieldConfig("Owner", &graphql.Field{
      Type: GQLInterfaceLockable(),
      Resolve: GQLLockableOwner,
    })

    gql_type_gql_thread.AddFieldConfig("Dependencies", &graphql.Field{
      Type: GQLListLockable(),
      Resolve: GQLLockableDependencies,
    })
  }
  return gql_type_gql_thread
}

var gql_type_base_thread *graphql.Object = nil
func GQLTypeBaseThread() * graphql.Object {
  if gql_type_base_thread == nil {
    gql_type_base_thread = graphql.NewObject(graphql.ObjectConfig{
      Name: "BaseThread",
      Interfaces: []*graphql.Interface{
        GQLInterfaceGraphNode(),
        GQLInterfaceThread(),
        GQLInterfaceLockable(),
      },
      IsTypeOf: func(p graphql.IsTypeOfParams) bool {
        valid_threads, ok := p.Context.Value("valid_threads").(map[reflect.Type]*graphql.Object)
        if ok == false {
          return false
        }
        value_type := reflect.TypeOf(p.Value)
        for go_type, _ := range(valid_threads) {
          if value_type == go_type {
            return true
          }
        }
        return false
      },
      Fields: graphql.Fields{},
    })
    gql_type_base_thread.AddFieldConfig("ID", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLNodeID,
    })

    gql_type_base_thread.AddFieldConfig("Name", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLNodeName,
    })

    gql_type_base_thread.AddFieldConfig("Children", &graphql.Field{
      Type: GQLListThread(),
      Resolve: GQLThreadChildren,
    })

    gql_type_base_thread.AddFieldConfig("Parent", &graphql.Field{
      Type: GQLInterfaceThread(),
      Resolve: GQLThreadParent,
    })

    gql_type_base_thread.AddFieldConfig("Requirements", &graphql.Field{
      Type: GQLListLockable(),
      Resolve: GQLLockableRequirements,
    })

    gql_type_base_thread.AddFieldConfig("Owner", &graphql.Field{
      Type: GQLInterfaceLockable(),
      Resolve: GQLLockableOwner,
    })

    gql_type_base_thread.AddFieldConfig("Dependencies", &graphql.Field{
      Type: GQLListLockable(),
      Resolve: GQLLockableDependencies,
    })
  }
  return gql_type_base_thread
}

var gql_type_base_lockable *graphql.Object = nil
func GQLTypeBaseLockable() * graphql.Object {
  if gql_type_base_lockable == nil {
    gql_type_base_lockable = graphql.NewObject(graphql.ObjectConfig{
      Name: "BaseLockable",
      Interfaces: []*graphql.Interface{
        GQLInterfaceGraphNode(),
        GQLInterfaceLockable(),
      },
      IsTypeOf: func(p graphql.IsTypeOfParams) bool {
        valid_lockables, ok := p.Context.Value("valid_lockables").(map[reflect.Type]*graphql.Object)
        if ok == false {
          return false
        }
        value_type := reflect.TypeOf(p.Value)
        for go_type, _ := range(valid_lockables) {
          if value_type == go_type {
            return true
          }
        }
        return false
      },
      Fields: graphql.Fields{},
    })

    gql_type_base_lockable.AddFieldConfig("ID", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLNodeID,
    })

    gql_type_base_lockable.AddFieldConfig("Name", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLNodeName,
    })

    gql_type_base_lockable.AddFieldConfig("Requirements", &graphql.Field{
      Type: GQLListLockable(),
      Resolve: GQLLockableRequirements,
    })

    gql_type_base_lockable.AddFieldConfig("Owner", &graphql.Field{
      Type: GQLInterfaceLockable(),
      Resolve: GQLLockableOwner,
    })

    gql_type_base_lockable.AddFieldConfig("Dependencies", &graphql.Field{
      Type: GQLListLockable(),
      Resolve: GQLLockableDependencies,
    })
  }

  return gql_type_base_lockable
}

var gql_type_base_node *graphql.Object = nil
func GQLTypeBaseNode() * graphql.Object {
  if gql_type_base_node == nil {
    gql_type_base_node = graphql.NewObject(graphql.ObjectConfig{
      Name: "BaseNode",
      Interfaces: []*graphql.Interface{
        GQLInterfaceGraphNode(),
      },
      IsTypeOf: func(p graphql.IsTypeOfParams) bool {
        valid_nodes, ok := p.Context.Value("valid_nodes").(map[reflect.Type]*graphql.Object)
        if ok == false {
          return false
        }
        value_type := reflect.TypeOf(p.Value)
        for go_type, _ := range(valid_nodes) {
          if value_type == go_type {
            return true
          }
        }
        return false
      },
      Fields: graphql.Fields{},
    })

    gql_type_base_node.AddFieldConfig("ID", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLNodeID,
    })

    gql_type_base_node.AddFieldConfig("Name", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLNodeName,
    })
  }

  return gql_type_base_node
}

func GQLSignalFn(p graphql.ResolveParams, fn func(GraphSignal, graphql.ResolveParams)(interface{}, error))(interface{}, error) {
    if signal, ok := p.Source.(GraphSignal); ok {
      return fn(signal, p)
    }
    return nil, fmt.Errorf("Failed to cast source to event")
}

func GQLSignalType(p graphql.ResolveParams) (interface{}, error) {
  return GQLSignalFn(p, func(signal GraphSignal, p graphql.ResolveParams)(interface{}, error){
    return signal.Type(), nil
  })
}

func GQLSignalSource(p graphql.ResolveParams) (interface{}, error) {
  return GQLSignalFn(p, func(signal GraphSignal, p graphql.ResolveParams)(interface{}, error){
    return signal.Source(), nil
  })
}

func GQLSignalDirection(p graphql.ResolveParams) (interface{}, error) {
    return GQLSignalFn(p, func(signal GraphSignal, p graphql.ResolveParams)(interface{}, error){
      direction := signal.Direction()
      if direction == Up {
        return "up", nil
      } else if direction == Down {
        return "down", nil
      } else if direction == Direct {
        return "direct", nil
      }
      return nil, fmt.Errorf("Invalid direction: %+v", direction)
    })
}

func GQLSignalString(p graphql.ResolveParams) (interface{}, error) {
    return GQLSignalFn(p, func(signal GraphSignal, p graphql.ResolveParams)(interface{}, error){
      return signal.String(), nil
    })
}


var gql_type_signal *graphql.Object = nil
func GQLTypeSignal() *graphql.Object {
  if gql_type_signal == nil {
    gql_type_signal = graphql.NewObject(graphql.ObjectConfig{
      Name: "SignalOut",
      IsTypeOf: func(p graphql.IsTypeOfParams) bool {
        _, ok := p.Value.(GraphSignal)
        return ok
      },
      Fields: graphql.Fields{},
    })

    gql_type_signal.AddFieldConfig("Type", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLSignalType,
    })
    gql_type_signal.AddFieldConfig("Source", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLSignalSource,
    })
    gql_type_signal.AddFieldConfig("Direction", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLSignalDirection,
    })
    gql_type_signal.AddFieldConfig("String", &graphql.Field{
      Type: graphql.String,
      Resolve: GQLSignalString,
    })
  }
  return gql_type_signal
}

var gql_type_signal_input *graphql.InputObject = nil
func GQLTypeSignalInput() *graphql.InputObject {
  if gql_type_signal_input == nil {
    gql_type_signal_input = graphql.NewInputObject(graphql.InputObjectConfig{
      Name: "SignalIn",
      Fields: graphql.InputObjectConfigFieldMap{},
    })
    gql_type_signal_input.AddFieldConfig("Type", &graphql.InputObjectFieldConfig{
      Type: graphql.String,
      DefaultValue: "cancel",
    })
    gql_type_signal_input.AddFieldConfig("Direction", &graphql.InputObjectFieldConfig{
      Type: graphql.String,
      DefaultValue: "down",
    })
  }
  return gql_type_signal_input
}

func GQLSubscribeSignal(p graphql.ResolveParams) (interface{}, error) {
  return GQLSubscribeFn(p, func(signal GraphSignal, p graphql.ResolveParams)(interface{}, error) {
    return signal, nil
  })
}

func GQLSubscribeFn(p graphql.ResolveParams, fn func(GraphSignal, graphql.ResolveParams)(interface{}, error))(interface{}, error) {
  server, ok := p.Context.Value("gql_server").(*GQLThread)
  if ok == false {
    return nil, fmt.Errorf("Failed to get gql_server from context and cast to GQLServer")
  }

  ctx, ok := p.Context.Value("graph_context").(*GraphContext)
  if ok == false {
    return nil, fmt.Errorf("Failed to get graph_context from context and cast to GraphContext")
  }

  c := make(chan interface{})
  go func(c chan interface{}, server *GQLThread) {
    sig_c := server.UpdateChannel(0)
    for {
      val, ok := <- sig_c
      if ok == false {
        return
      }
      ret, err := fn(val, p)
      if err != nil {
        ctx.Log.Logf("gqlws", "type convertor error %s", err)
        return
      }
      c <- ret
    }
  }(c, server)
  return c, nil
}

var gql_subscription_update * graphql.Field = nil
func GQLSubscriptionUpdate() * graphql.Field {
  if gql_subscription_update == nil {
    gql_subscription_update = &graphql.Field{
      Type: GQLTypeSignal(),
      Resolve: func(p graphql.ResolveParams) (interface{}, error) {
        return p.Source, nil
      },
      Subscribe: GQLSubscribeSignal,
    }
  }

  return gql_subscription_update
}

var gql_mutation_send_update *graphql.Field = nil
func GQLMutationSendUpdate() *graphql.Field {
  if gql_mutation_send_update == nil {
    gql_mutation_send_update = &graphql.Field{
      Type: GQLTypeSignal(),
      Args: graphql.FieldConfigArgument{
        "id": &graphql.ArgumentConfig{
          Type: graphql.String,
        },
        "signal": &graphql.ArgumentConfig{
          Type: GQLTypeSignalInput(),
        },
      },
      Resolve: func(p graphql.ResolveParams) (interface{}, error) {
        server, ok := p.Context.Value("gql_server").(*GQLThread)
        if ok == false {
          return nil, fmt.Errorf("Failed to cast context gql_server to GQLServer: %+v", p.Context.Value("gql_server"))
        }

        ctx, ok := p.Context.Value("graph_context").(*GraphContext)
        if ok == false {
          return nil, fmt.Errorf("Failed to cast context graph_context to GraphContext: %+v", p.Context.Value("graph_context"))
        }

        signal_map, ok := p.Args["signal"].(map[string]interface{})
        if ok == false {
          return nil, fmt.Errorf("Failed to cast arg signal to GraphSignal: %+v", p.Args["signal"])
        }
        var signal GraphSignal = nil
        if signal_map["Direction"] == "up" {
          signal = NewSignal(server, signal_map["Type"].(string))
        } else if signal_map["Direction"] == "down" {
          signal = NewDownSignal(server, signal_map["Type"].(string))
        } else if signal_map["Direction"] == "direct" {
          signal = NewDirectSignal(server, signal_map["Type"].(string))
        } else {
          return nil, fmt.Errorf("Bad direction: %d", signal_map["Direction"])
        }

        id , ok := p.Args["id"].(string)
        if ok == false {
          return nil, fmt.Errorf("Failed to cast arg id to string")
        }

        node_if, err := UseStates(ctx, []GraphNode{server}, func(states []NodeState) (interface{}, error){
          server_state := states[0].(*GQLThreadState)
          node := FindChild(ctx, server, server_state, NodeID(id))
          if node == nil {
            return nil, fmt.Errorf("Failed to find ID: %s as child of server thread", id)
          }
          return node, nil
        })
        if err != nil {
          return nil, err
        }

        node, ok := node_if.(GraphNode)
        if ok == false {
          return nil, fmt.Errorf("Failed to cast found node to GraphNode")
        }

        SendUpdate(ctx, node, signal)
        return signal, nil
      },
    }
  }

  return gql_mutation_send_update
}

var gql_query_self *graphql.Field = nil
func GQLQuerySelf() *graphql.Field {
  if gql_query_self == nil {
    gql_query_self = &graphql.Field{
      Type: GQLTypeGQLThread(),
      Resolve: func(p graphql.ResolveParams) (interface{}, error) {
        server, ok := p.Context.Value("gql_server").(*GQLThread)
        if ok == false {
          return nil, fmt.Errorf("failed to cast gql_server to GQLThread")
        }

        return server, nil
      },
    }
  }

  return gql_query_self
}