Initial Bitbucket→GitHub migration commit, based on release v2.0.0.

passagedata.go

@@ -0,0 +1,42 @@
+/*
+	Copyright © 2014–2019 Thomas Michael Edwards. All rights reserved.
+	Use of this source code is governed by a Simplified BSD License which
+	can be found in the LICENSE file.
+*/
+
+package main
+
+import (
+	"encoding/json"
+)
+
+type passageMetadataJSON struct {
+	Position string `json:"position,omitempty"` // Twine 2 (`position`) & Twine 1 (`twine-position`).
+	Size     string `json:"size,omitempty"`     // Twine 2 (`size`).
+}
+
+func (p *passage) marshalMetadata() []byte {
+	marshaled, err := json.Marshal(&passageMetadataJSON{
+		p.metadata.position,
+		p.metadata.size,
+	})
+	if err != nil {
+		// NOTE: We should never be able to see an error here.  If we do,
+		// then something truly exceptional—in a bad way—has happened, so
+		// we get our panic on.
+		panic(err)
+	}
+	return marshaled
+}
+
+func (p *passage) unmarshalMetadata(marshaled []byte) error {
+	metadata := passageMetadataJSON{}
+	if err := json.Unmarshal(marshaled, &metadata); err != nil {
+		return err
+	}
+	p.metadata = &passageMetadata{
+		position: metadata.Position,
+		size:     metadata.Size,
+	}
+	return nil
+}