Add database key for EV table events

util/keys/ev.go

@@ -0,0 +1,58 @@
+// Copyright © 2016 Abcum Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package keys
+
+// EV ...
+type EV struct {
+	KV string
+	NS string
+	DB string
+	TB string
+	EV string
+}
+
+// init initialises the key
+func (k *EV) init() *EV {
+	return k
+}
+
+// Copy creates a copy of the key
+func (k *EV) Copy() *EV {
+	return &EV{
+		KV: k.KV,
+		NS: k.NS,
+		DB: k.DB,
+		TB: k.TB,
+		EV: k.EV,
+	}
+}
+
+// Encode encodes the key into binary
+func (k *EV) Encode() []byte {
+	k.init()
+	return encode(k.KV, k.NS, "*", k.DB, "*", k.TB, "!", "e", k.EV)
+}
+
+// Decode decodes the key from binary
+func (k *EV) Decode(data []byte) {
+	k.init()
+	decode(data, &k.KV, &k.NS, &skip, &k.DB, &skip, &k.TB, &skip, &skip, &k.EV)
+}
+
+// String returns a string representation of the key
+func (k *EV) String() string {
+	k.init()
+	return output(k.KV, k.NS, "*", k.DB, "*", k.TB, "!", "e", k.EV)
+}

util/keys/keys_test.go

@@ -130,6 +130,11 @@ func TestMain(t *testing.T) {
 			obj: &TB{KV: "surreal", NS: "abcum", DB: "database", TB: "person"},
 			new: &TB{},
 		},
+		{
+			str: "/surreal/abcum/*/database/*/person/!/e/trigger",
+			obj: &EV{KV: "surreal", NS: "abcum", DB: "database", TB: "person", EV: "trigger"},
+			new: &EV{},
+		},
 		{
 			str: "/surreal/abcum/*/database/*/person/!/f/fullname",
 			obj: &FD{KV: "surreal", NS: "abcum", DB: "database", TB: "person", FD: "fullname"},