Move the JSPF playlist code into public module

pkg/jspf/io.go

@@ -0,0 +1,52 @@
+/*
+Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+// Package for reading and writing music playlists in the JSPF format.
+//
+// JSPF is the JSON representation of XSPF, see https://www.xspf.org/jspf
+package jspf
+
+import (
+	"encoding/json"
+	"io"
+)
+
+// Reads the JSPF playlist in JSON format from the given io.Reader
+func (j *JSPF) Read(in io.Reader) error {
+	bytes, err := io.ReadAll(in)
+	if err != nil {
+		return err
+	}
+	err = json.Unmarshal(bytes, j)
+	return err
+}
+
+// Writes the JSPF playlist in JSON format to the given io.Writer
+func (j *JSPF) Write(out io.Writer) error {
+	jspfJson, err := json.MarshalIndent(j, "", "\t")
+	if err != nil {
+		return err
+	}
+
+	_, err = out.Write(jspfJson)
+	return err
+}