Search bar for issues/pulls (#530)

vendor/github.com/blevesearch/bleve/mapping/reflect.go

@@ -0,0 +1,89 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// 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 mapping
+
+import (
+	"reflect"
+	"strings"
+)
+
+func lookupPropertyPath(data interface{}, path string) interface{} {
+	pathParts := decodePath(path)
+
+	current := data
+	for _, part := range pathParts {
+		current = lookupPropertyPathPart(current, part)
+		if current == nil {
+			break
+		}
+	}
+
+	return current
+}
+
+func lookupPropertyPathPart(data interface{}, part string) interface{} {
+	val := reflect.ValueOf(data)
+	typ := val.Type()
+	switch typ.Kind() {
+	case reflect.Map:
+		// FIXME can add support for other map keys in the future
+		if typ.Key().Kind() == reflect.String {
+			key := reflect.ValueOf(part)
+			entry := val.MapIndex(key)
+			if entry.IsValid() {
+				return entry.Interface()
+			}
+		}
+	case reflect.Struct:
+		field := val.FieldByName(part)
+		if field.IsValid() && field.CanInterface() {
+			return field.Interface()
+		}
+	case reflect.Ptr:
+		ptrElem := val.Elem()
+		if ptrElem.IsValid() && ptrElem.CanInterface() {
+			return lookupPropertyPathPart(ptrElem.Interface(), part)
+		}
+	}
+	return nil
+}
+
+const pathSeparator = "."
+
+func decodePath(path string) []string {
+	return strings.Split(path, pathSeparator)
+}
+
+func encodePath(pathElements []string) string {
+	return strings.Join(pathElements, pathSeparator)
+}
+
+func mustString(data interface{}) (string, bool) {
+	if data != nil {
+		str, ok := data.(string)
+		if ok {
+			return str, true
+		}
+	}
+	return "", false
+}
+
+// parseTagName extracts the field name from a struct tag
+func parseTagName(tag string) string {
+	if idx := strings.Index(tag, ","); idx != -1 {
+		return tag[:idx]
+	}
+	return tag
+}