First pass of gql read permission

gql_mutation.go

@@ -16,7 +16,7 @@ var GQLMutationSendUpdate = NewField(func()*graphql.Field {
       },
     },
     Resolve: func(p graphql.ResolveParams) (interface{}, error) {
-      ctx, err := GetResolveContext(p)
+      ctx, err := PrepResolve(p)
       if err != nil {
         return nil, err
       }
@@ -83,7 +83,7 @@ var GQLMutationStartChild = NewField(func()*graphql.Field{
       },
     },
     Resolve: func(p graphql.ResolveParams) (interface{}, error) {
-      ctx, err := GetResolveContext(p)
+      ctx, err := PrepResolve(p)
       if err != nil {
         return nil, err
       }

gql_query.go

@@ -6,7 +6,7 @@ import (
 var GQLQuerySelf = &graphql.Field{
   Type: GQLTypeGQLThread.Type,
   Resolve: func(p graphql.ResolveParams) (interface{}, error) {
-    ctx, err := GetResolveContext(p)
+    ctx, err := PrepResolve(p)
     if err != nil {
       return nil, err
     }
@@ -23,7 +23,7 @@ var GQLQuerySelf = &graphql.Field{
 var GQLQueryUser = &graphql.Field{
   Type: GQLTypeUser.Type,
   Resolve: func(p graphql.ResolveParams) (interface{}, error) {
-    ctx, err := GetResolveContext(p)
+    ctx, err := PrepResolve(p)
     if err != nil {
       return nil, err
     }

gql_resolvers.go

@@ -5,7 +5,7 @@ import (
   "github.com/graphql-go/graphql"
 )
 
-func GetResolveContext(p graphql.ResolveParams) (*ResolveContext, error) {
+func PrepResolve(p graphql.ResolveParams) (*ResolveContext, error) {
   resolve_context, ok := p.Context.Value("resolve").(*ResolveContext)
   if ok == false {
     return nil, fmt.Errorf("Bad resolve in params context")
@@ -43,28 +43,42 @@ func ExtractID(p graphql.ResolveParams, name string) (NodeID, error) {
 }
 
 func GQLNodeID(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   node, ok := p.Source.(Node)
   if ok == false || node == nil {
     return nil, fmt.Errorf("Failed to cast source to Node")
   }
+
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) error {
+    return node.Allowed("read", "id", ctx.User)
+  })
+  if err != nil {
+    return nil, err
+  }
+
   return node.ID(), nil
 }
 
 func GQLThreadListen(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
-  }
 
   listen := ""
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) (error) {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) error {
     listen = node.Listen
-    return nil
+    return node.Allowed("read", "listen", ctx.User)
   })
 
   if err != nil {
@@ -75,20 +89,20 @@ func GQLThreadListen(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLThreadParent(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
-  }
-
   var parent Thread = nil
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) (error) {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) (error) {
     parent = node.Parent()
-    return nil
+    return node.Allowed("read", "parent", ctx.User)
   })
 
   if err != nil {
@@ -99,20 +113,20 @@ func GQLThreadParent(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLThreadState(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
-  }
-
   var state string
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) (error) {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) (error) {
     state = node.State()
-    return nil
+    return node.Allowed("read", "state", ctx.User)
   })
 
   if err != nil {
@@ -123,20 +137,20 @@ func GQLThreadState(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLThreadChildren(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
-  }
-
   var children []Thread = nil
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) (error) {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) (error) {
     children = node.Children()
-    return nil
+    return node.Allowed("read", "children", ctx.User)
   })
 
   if err != nil {
@@ -147,20 +161,20 @@ func GQLThreadChildren(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLLockableName(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, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
   }
 
-  ctx, ok := p.Context.Value("graph_context").(*Context)
+  node, ok := p.Source.(Lockable)
   if ok == false || node == nil {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
+    return nil, fmt.Errorf("Failed to cast source to Lockable")
   }
 
   name := ""
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) error {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) error {
     name = node.Name()
-    return nil
+    return node.Allowed("read", "name", ctx.User)
   })
 
   if err != nil {
@@ -171,20 +185,20 @@ func GQLLockableName(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLLockableRequirements(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
-  }
-
   var requirements []Lockable = nil
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) (error) {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) (error) {
     requirements = node.Requirements()
-    return nil
+    return node.Allowed("read", "requirements", ctx.User)
   })
 
   if err != nil {
@@ -195,20 +209,20 @@ func GQLLockableRequirements(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLLockableDependencies(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
-  }
-
   var dependencies []Lockable = nil
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) (error) {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) (error) {
     dependencies = node.Dependencies()
-    return nil
+    return node.Allowed("read", "dependencies", ctx.User)
   })
 
   if err != nil {
@@ -219,20 +233,20 @@ func GQLLockableDependencies(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLLockableOwner(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
-  }
-
   var owner Node = nil
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) (error) {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) (error) {
     owner = node.Owner()
-    return nil
+    return node.Allowed("read", "owner", ctx.User)
   })
 
   if err != nil {
@@ -243,25 +257,25 @@ func GQLLockableOwner(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLThreadUsers(p graphql.ResolveParams) (interface{}, error) {
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
+  }
+
   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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to cast context graph_context to Context")
-  }
-
   var users []*User
-  err := UseStates(ctx, []Node{node}, func(nodes NodeMap) error {
+  err = UseStates(ctx.Context, []Node{node, ctx.User}, func(nodes NodeMap) error {
     users = make([]*User, len(node.Users))
     i := 0
     for _, user := range(node.Users) {
       users[i] = user
       i += 1
     }
-    return nil
+    return node.Allowed("read", "users", ctx.User)
   })
 
   if err != nil {

gql_subscribe.go

@@ -1,6 +1,5 @@
 package graphvent
 import (
-  "fmt"
   "github.com/graphql-go/graphql"
 )
 
@@ -17,19 +16,14 @@ func GQLSubscribeSelf(p graphql.ResolveParams) (interface{}, error) {
 }
 
 func GQLSubscribeFn(p graphql.ResolveParams, send_nil bool, fn func(*Context, *GQLThread, 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").(*Context)
-  if ok == false {
-    return nil, fmt.Errorf("Failed to get graph_context from context and cast to Context")
+  ctx, err := PrepResolve(p)
+  if err != nil {
+    return nil, err
   }
 
   c := make(chan interface{})
   go func(c chan interface{}, server *GQLThread) {
-    ctx.Log.Logf("gqlws", "GQL_SUBSCRIBE_THREAD_START")
+    ctx.Context.Log.Logf("gqlws", "GQL_SUBSCRIBE_THREAD_START")
     sig_c := UpdateChannel(server, 1, RandID())
     if send_nil == true {
       sig_c <- nil
@@ -39,14 +33,14 @@ func GQLSubscribeFn(p graphql.ResolveParams, send_nil bool, fn func(*Context, *G
       if ok == false {
         return
       }
-      ret, err := fn(ctx, server, val, p)
+      ret, err := fn(ctx.Context, server, val, p)
       if err != nil {
-        ctx.Log.Logf("gqlws", "type convertor error %s", err)
+        ctx.Context.Log.Logf("gqlws", "type convertor error %s", err)
         return
       }
       c <- ret
     }
-  }(c, server)
+  }(c, ctx.Server)
   return c, nil
 }
 

node.go

@@ -406,21 +406,22 @@ func LoadNodeRecurse(ctx * Context, id NodeID, nodes NodeMap) (Node, error) {
   return node, nil
 }
 
-// Internal function to check for a duplicate node in a slice by ID
-func checkForDuplicate(nodes []Node) error {
+// Internal function to filter duplicate nodes from a list
+func filterDuplicates(nodes []Node) []Node {
+  ret := []Node{}
   found := map[NodeID]bool{}
   for _, node := range(nodes) {
     if node == nil {
-      return fmt.Errorf("Cannot get state of nil node")
+      return []Node{}
     }
 
     _, exists := found[node.ID()]
-    if exists == true {
-      return fmt.Errorf("Attempted to get state of %s twice", node.ID())
-    }
+    if exists == false {
       found[node.ID()] = true
+      ret = append(ret, node)
     }
-  return nil
+  }
+  return ret
 }
 
 // Convert any slice of types that implement Node to a []Node
@@ -443,10 +444,7 @@ func UseStates(ctx * Context, init_nodes []Node, nodes_fn NodesFn) error {
 
 // Add nodes to an existing read context and call nodes_fn with new_nodes locked for read
 func UseMoreStates(ctx * Context, new_nodes []Node, nodes NodeMap, nodes_fn NodesFn) error {
-  err := checkForDuplicate(new_nodes)
-  if err != nil {
-    return err
-  }
+  new_nodes = filterDuplicates(new_nodes)
 
   locked_nodes := []Node{}
   for _, node := range(new_nodes) {
@@ -458,7 +456,7 @@ func UseMoreStates(ctx * Context, new_nodes []Node, nodes NodeMap, nodes_fn Node
     }
   }
 
-  err = nodes_fn(nodes)
+  err := nodes_fn(nodes)
 
   for _, node := range(locked_nodes) {
     delete(nodes, node.ID())