1 files changed, 53 insertions, 0 deletions
diff --git a/config.go b/config.go
new file mode 100644
index 0000000..9cd614d
--- /dev/null
+++ b/config.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"git.rnrd.eu/ddnnss/provider"
+	"git.rnrd.eu/ddnnss/source"
+)
+
+// a record target which we will try to update
+// via the provider!
+type Record struct {
+	Zone     string              `json:"zone"`
+	Name     string              `json:"name"`
+	Type     provider.RecordType `json:"type"`
+	Provider string              `json:"provider"`
+	Source   string              `json:"source"`
+}
+
+type Config struct {
+	Records   []Record                   `json:"records"`
+	Providers map[string]provider.Config `json:"providers"`
+	Sources   map[string]source.Config   `json:"sources"`
+}
+
+func LoadConfig(path string) (*Config, error) {
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	var cfg Config
+	if err := json.Unmarshal(raw, &cfg); err != nil {
+		return nil, fmt.Errorf("%s: %w", path, err)
+	}
+
+	for i, r := range cfg.Records {
+		switch r.Type {
+		case provider.TypeA, provider.TypeAAAA:
+		default:
+			return nil, fmt.Errorf("record %d: type must be A or AAAA", i)
+		}
+		if _, ok := cfg.Providers[r.Provider]; !ok {
+			return nil, fmt.Errorf("record %d: unknown provider %q", i, r.Provider)
+		}
+		if _, ok := cfg.Sources[r.Source]; !ok {
+			return nil, fmt.Errorf("record %d: unknown source %q", i, r.Source)
+		}
+	}
+	return &cfg, nil
+}