From 910bf9c76d33ee6d408f23ce3470418c54aa6029 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Fri, 17 Apr 2015 09:18:21 -0700
Subject: [PATCH] logical/framework: PathStruct

---
 logical/framework/path_struct.go      | 93 +++++++++++++++++++++++++++
 logical/framework/path_struct_test.go | 56 ++++++++++++++++
 2 files changed, 149 insertions(+)
 create mode 100644 logical/framework/path_struct.go
 create mode 100644 logical/framework/path_struct_test.go

diff --git a/logical/framework/path_struct.go b/logical/framework/path_struct.go
new file mode 100644
index 000000000..fb9a5bee7
--- /dev/null
+++ b/logical/framework/path_struct.go
@@ -0,0 +1,93 @@
+package framework
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/hashicorp/vault/logical"
+)
+
+// PathStruct can be used to generate a path that stores a struct
+// in the storage. This structure is a map[string]interface{} but the
+// types are set according to the schema in this structure.
+type PathStruct struct {
+	Name            string
+	Path            string
+	Schema          map[string]*FieldSchema
+	HelpSynopsis    string
+	HelpDescription string
+
+	Read bool
+}
+
+// Get reads the structure.
+func (p *PathStruct) Get(s logical.Storage) (map[string]interface{}, error) {
+	entry, err := s.Get(fmt.Sprintf("struct/%s", p.Name))
+	if err != nil {
+		return nil, err
+	}
+	if entry == nil {
+		return nil, nil
+	}
+
+	var result map[string]interface{}
+	if err := json.Unmarshal(entry.Value, &result); err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}
+
+// Put writes the structure.
+func (p *PathStruct) Put(s logical.Storage, v map[string]interface{}) error {
+	bytes, err := json.Marshal(v)
+	if err != nil {
+		return err
+	}
+
+	return s.Put(&logical.StorageEntry{
+		Key:   fmt.Sprintf("struct/%s", p.Name),
+		Value: bytes,
+	})
+}
+
+// Paths are the paths to append to the Backend paths.
+func (p *PathStruct) Paths() []*Path {
+	// The single path we support to read/write this config
+	path := &Path{
+		Pattern: p.Path,
+		Fields:  p.Schema,
+
+		Callbacks: map[logical.Operation]OperationFunc{
+			logical.WriteOperation: p.pathWrite,
+		},
+
+		HelpSynopsis:    p.HelpSynopsis,
+		HelpDescription: p.HelpDescription,
+	}
+
+	// If we support reads, add that
+	if p.Read {
+		path.Callbacks[logical.ReadOperation] = p.pathRead
+	}
+
+	return []*Path{path}
+}
+
+func (p *PathStruct) pathRead(
+	req *logical.Request, d *FieldData) (*logical.Response, error) {
+	v, err := p.Get(req.Storage)
+	if err != nil {
+		return nil, err
+	}
+
+	return &logical.Response{
+		Data: v,
+	}, nil
+}
+
+func (p *PathStruct) pathWrite(
+	req *logical.Request, d *FieldData) (*logical.Response, error) {
+	err := p.Put(req.Storage, d.Raw)
+	return nil, err
+}
diff --git a/logical/framework/path_struct_test.go b/logical/framework/path_struct_test.go
new file mode 100644
index 000000000..88003b5fd
--- /dev/null
+++ b/logical/framework/path_struct_test.go
@@ -0,0 +1,56 @@
+package framework
+
+import (
+	"testing"
+
+	"github.com/hashicorp/vault/logical"
+)
+
+func TestPathStruct(t *testing.T) {
+	p := &PathStruct{
+		Name: "foo",
+		Path: "bar",
+		Schema: map[string]*FieldSchema{
+			"value": &FieldSchema{Type: TypeString},
+		},
+		Read: true,
+	}
+
+	storage := new(logical.InmemStorage)
+	var b logical.Backend = &Backend{Paths: p.Paths()}
+
+	// Write via HTTP
+	_, err := b.HandleRequest(&logical.Request{
+		Operation: logical.WriteOperation,
+		Path:      "bar",
+		Data: map[string]interface{}{
+			"value": "baz",
+		},
+		Storage: storage,
+	})
+	if err != nil {
+		t.Fatalf("bad: %#v", err)
+	}
+
+	// Read via HTTP
+	resp, err := b.HandleRequest(&logical.Request{
+		Operation: logical.ReadOperation,
+		Path:      "bar",
+		Storage:   storage,
+	})
+	if err != nil {
+		t.Fatalf("bad: %#v", err)
+	}
+	if resp.Data["value"] != "baz" {
+		t.Fatalf("bad: %#v", resp)
+	}
+
+	// Read via API
+	v, err := p.Get(storage)
+	if err != nil {
+		t.Fatalf("bad: %#v", err)
+	}
+	if v["value"] != "baz" {
+		t.Fatalf("bad: %#v", v)
+	}
+}