Function injectJSONPropertyFromBytes

base/util.go:1407–1439

injectJSONPropertyFromBytes injects val under the given key into b.

(b []byte, bIsEmpty bool, kvPairs []KVPairBytes)

// injectJSONPropertyFromBytes injects val under the given key into b.
func injectJSONPropertyFromBytes(b []byte, bIsEmpty bool, kvPairs []KVPairBytes) (newJSON []byte) {

	newJSONLength := len(b)
	for _, kv := range kvPairs {
		newJSONLength += len(kv.Key) + len(kv.Val) + 4 // json overhead for comma, quoted key, and colon
	}
	if bIsEmpty {
		// Take off the length of a comma when the starting body is empty
		newJSONLength--
	}

	// Create the new byte slice with the required capacity
	newJSON = make([]byte, newJSONLength)

	// copy almost all of b, except the last closing brace
	offset := copy(newJSON, b[0:len(b)-1])

	for i, kv := range kvPairs {
		// if the body isn't empty, or we're not on our first value, prepend a comma before our property
		if i > 0 || !bIsEmpty {
			offset += copy(newJSON[offset:], ",")
		}

		// inject valBytes as the last property
		offset += copy(newJSON[offset:], `"`+kv.Key+`":`)
		offset += copy(newJSON[offset:], kv.Val)
	}

	// closing brace
	_ = copy(newJSON[offset:], "}")

	return newJSON
}

// WrapJSONUnknownFieldErr wraps JSON unknown field errors with ErrUnknownField for later checking via errors.Cause
func WrapJSONUnknownFieldErr(err error) error {