Initial commit

pkg/config/config.go

@@ -0,0 +1,90 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"strings"
+)
+
+var config map[string]interface{}
+
+func Load(path string) error {
+	err := loadConfigFile(path)
+	if err != nil {
+		return err
+	}
+
+	env := os.Getenv("addrss_ENVIRONMENT")
+	if env != "" {
+		path = strings.ReplaceAll(path, ".json", "."+env+".json")
+		err = loadConfigFile(path)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func GetString(key string) (string, error) {
+	v, err := Get(key)
+	if err != nil {
+		return "", err
+	}
+
+	return v.(string), nil
+}
+
+func GetInt64(key string) (int64, error) {
+	v, err := Get(key)
+	if err != nil {
+		return 0, err
+	}
+
+	return int64(v.(float64)), nil
+}
+
+func GetBool(key string) (bool, error) {
+	v, err := Get(key)
+	if err != nil {
+		return false, err
+	}
+
+	return v.(bool), nil
+}
+
+func Get(key string) (interface{}, error) {
+	value, ok := config[key]
+	if !ok {
+		return nil, fmt.Errorf("configuration value not found for key %s", key)
+	}
+
+	switch v := value.(type) {
+	case string:
+		if strings.Contains(v, "{{") && strings.Contains(v, "}}") {
+			_, a, _ := strings.Cut(v, "{{")
+			envVar, _, _ := strings.Cut(a, "}}")
+
+			value = strings.ReplaceAll(v, "{{"+envVar+"}}", os.Getenv(envVar))
+		}
+		return value, nil
+
+	default:
+		return value, nil
+	}
+}
+
+func loadConfigFile(path string) error {
+	contents, err := os.ReadFile(path)
+	if err != nil {
+		return err
+	}
+
+	err = json.Unmarshal(contents, &config)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}