Switch from local playback to soundbox streaming

This commit replaces the local playback of the received audio content by
forwarding it to one or multiple soundbox devices.

For this purpose the soundbox-go[1] library is used.

The target devices cannot be selected via the GUI. Thus all devices are
specified in the ~/.config/soundbox/config.json file. The format has to
be looked up based on the code. Further documentation will follow.

[1]: https://xengineering.eu/git/soundbox-go

1 files changed, 47 insertions, 0 deletions

diff --git a/config.go b/config.go
new file mode 100644
index 0000000..5bdd48c
--- /dev/null
+++ b/config.go
@@ -0,0 +1,47 @@
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+const configPathRelative = `.config/soundbox/config.json`
+
+type SoundboxConfig struct {
+	Name string `json:"name"`
+	Mac  string `json:"mac"`
+}
+
+type GlobalConfig struct {
+	Soundboxes []SoundboxConfig `json:"soundboxes"`
+}
+
+func loadConfig() (GlobalConfig, error) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return GlobalConfig{}, err
+	}
+
+	path := filepath.Join(home, configPathRelative)
+
+	file, err := os.Open(path)
+	if err != nil {
+		return GlobalConfig{}, err
+	}
+	defer file.Close()
+
+	bytes, err := io.ReadAll(file)
+	if err != nil {
+		return GlobalConfig{}, err
+	}
+
+	var config GlobalConfig
+	err = json.Unmarshal(bytes, &config)
+	if err != nil {
+		return GlobalConfig{}, err
+	}
+
+	return config, nil
+}