Add default config parsing

This is a first step towards configurability.

1 files changed, 38 insertions, 0 deletions

diff --git a/config.go b/config.go
new file mode 100644
index 0000000..38f0af9
--- /dev/null
+++ b/config.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	_ "embed"
+	"encoding/json"
+	"log"
+)
+
+//go:embed configs/default.json
+var defaultConfig []byte
+
+type StartupConfig struct {
+	MQTT struct {
+		Broker      string `json:"broker"`
+		ClientID    string `json:"client-id"`
+		TopicPrefix string `json:"topic-prefix"`
+	} `json:"mqtt"`
+
+	Homematic struct {
+		CCU                       string `json:"ccu"`
+		PollingPeriodMilliseconds int `json:"polling-period-milliseconds"`
+	} `json:"homematic"`
+}
+
+func (sc *StartupConfig) FromJSON(data []byte) error {
+	return json.Unmarshal(data, sc)
+}
+
+func GetStartupConfig() StartupConfig {
+	config := StartupConfig{}
+
+	err := config.FromJSON(defaultConfig)
+	if err != nil {
+		log.Fatalf("Could not parse default config: %v", err)
+	}
+
+	return config
+}