102 lines
3.0 KiB
Go
102 lines
3.0 KiB
Go
package graphvent
|
|
import (
|
|
"time"
|
|
"reflect"
|
|
"fmt"
|
|
"github.com/graphql-go/graphql"
|
|
"github.com/graphql-go/graphql/language/ast"
|
|
"github.com/google/uuid"
|
|
)
|
|
|
|
func ResolveNodeID(p graphql.ResolveParams) (interface{}, error) {
|
|
node, ok := p.Source.(NodeResult)
|
|
if ok == false {
|
|
return nil, fmt.Errorf("Can't get NodeID from %+v", reflect.TypeOf(p.Source))
|
|
}
|
|
|
|
return node.ID, nil
|
|
}
|
|
|
|
func ResolveNodeTypeHash(p graphql.ResolveParams) (interface{}, error) {
|
|
node, ok := p.Source.(NodeResult)
|
|
if ok == false {
|
|
return nil, fmt.Errorf("Can't get TypeHash from %+v", reflect.TypeOf(p.Source))
|
|
}
|
|
|
|
return uint64(node.Result.NodeType), nil
|
|
}
|
|
|
|
func GetFieldNames(ctx *Context, selection_set *ast.SelectionSet) []string {
|
|
names := []string{}
|
|
if selection_set == nil {
|
|
return names
|
|
}
|
|
|
|
for _, sel := range(selection_set.Selections) {
|
|
switch field := sel.(type) {
|
|
case *ast.Field:
|
|
names = append(names, field.Name.Value)
|
|
case *ast.InlineFragment:
|
|
names = append(names, GetFieldNames(ctx, field.SelectionSet)...)
|
|
default:
|
|
ctx.Log.Logf("gql", "Unknown selection type: %s", reflect.TypeOf(field))
|
|
}
|
|
}
|
|
|
|
return names
|
|
}
|
|
|
|
func GetResolveFields(ctx *Context, p graphql.ResolveParams) []string {
|
|
names := []string{}
|
|
for _, field := range(p.Info.FieldASTs) {
|
|
names = append(names, GetFieldNames(ctx, field.SelectionSet)...)
|
|
}
|
|
|
|
return names
|
|
}
|
|
|
|
func ResolveNodes(ctx *ResolveContext, p graphql.ResolveParams, ids []NodeID) ([]NodeResult, error) {
|
|
fields := GetResolveFields(ctx.Context, p)
|
|
ctx.Context.Log.Logf("gql", "RESOLVE_NODES(%+v): %+v", ids, fields)
|
|
|
|
resp_channels := map[uuid.UUID]chan Signal{}
|
|
node_ids := map[uuid.UUID]NodeID{}
|
|
for _, id := range(ids) {
|
|
// Get a list of fields that will be written
|
|
ext_fields, err := ctx.GQLContext.GetACLFields(p.Info.FieldName, fields)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// Create a read signal, send it to the specified node, and add the wait to the response map if the send returns no error
|
|
read_signal := NewReadSignal(ext_fields)
|
|
msgs := Messages{}
|
|
msgs = msgs.Add(ctx.Context, ctx.Server.ID, ctx.Key, read_signal, id)
|
|
|
|
response_chan := ctx.Ext.GetResponseChannel(read_signal.ID)
|
|
resp_channels[read_signal.ID] = response_chan
|
|
node_ids[read_signal.ID] = id
|
|
|
|
// TODO: Send all at once instead of creating Messages for each
|
|
err = ctx.Context.Send(msgs)
|
|
if err != nil {
|
|
ctx.Ext.FreeResponseChannel(read_signal.ID)
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
responses := []NodeResult{}
|
|
for sig_id, response_chan := range(resp_channels) {
|
|
// Wait for the response, returning an error on timeout
|
|
response, err := WaitForSignal(response_chan, time.Millisecond*100, func(sig *ReadResultSignal)bool{
|
|
return sig.ReqID == sig_id
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
responses = append(responses, NodeResult{node_ids[sig_id], response})
|
|
}
|
|
ctx.Context.Log.Logf("gql", "RESOLVED_NODES")
|
|
|
|
return responses, nil
|
|
}
|