Initial commit

config/config.go

@@ -0,0 +1,23 @@
+package config
+
+// AppConfig contains application configuration
+var AppConfig Config
+
+// Load application configuration
+func Load() {
+
+	AppConfig = Config{
+
+		Service: Service{
+			Port:    getEnv("OPENFIRE_PORT", "5222"),
+			Address: mustGetEnv("OPENFIRE_ADRESS"),
+			Domain:  mustGetEnv("OPENFIRE_DOMAIN"),
+		},
+		Credentials: Credentials{
+			CredentialsFileLocation: getEnv("CREDENTIALS_FILE_LOCATION", "input.json"),
+		},
+		GeneralOptions: GeneralOptions{
+			DelayBetweenMassages: int64(getEnvInt("MASSAGE_DELAY", 120000000000)),
+		},
+	}
+}

config/helpers.go

@@ -0,0 +1,56 @@
+package config
+
+import (
+	"log"
+	"os"
+	"strconv"
+)
+
+// getEnv returns value for give key from environment
+// if key is not present in environment it returns defaultValue
+func getEnv(key, defaultValue string) string {
+	v := os.Getenv(key)
+	if len(v) > 0 {
+		return v
+	}
+	return defaultValue
+}
+
+// getEnvInt returns integer value for give key from environment
+// if key is not present in environment it returns defaultValue
+// if key cannot be parsed to integer function will panic
+func getEnvInt(key string, defaultValue int) int {
+	v := os.Getenv(key)
+	if len(v) == 0 {
+		return defaultValue
+	}
+
+	valInteger, err := strconv.Atoi(v)
+	if err != nil {
+		log.Fatalf("variable `%s` cannot be parsed to INTEGER", key)
+	}
+
+	return valInteger
+}
+
+// getEnv extracts the bool value from environment variable
+func getEnvBool(env string) bool {
+	envVal := mustGetEnv(env)
+	value, err := strconv.ParseBool(envVal)
+
+	if err != nil {
+		value = false
+	}
+
+	return value
+}
+
+// mustGetEnv returns value for give key from environment
+// if key is not present in environment function will panic
+func mustGetEnv(key string) string {
+	v := os.Getenv(key)
+	if len(v) == 0 {
+		log.Fatalf(" variable `%s` is not present in ENVIRONMENT", key)
+	}
+	return v
+}

config/models.go

@@ -0,0 +1,25 @@
+package config
+
+// Config stores application configuration
+type Config struct {
+	Service        Service
+	Credentials    Credentials
+	GeneralOptions GeneralOptions
+}
+
+// Service contains configuration for service
+type Service struct {
+	Port    string
+	Address string
+	Domain  string
+}
+
+// Credentials contains information about client credentials
+type Credentials struct {
+	CredentialsFileLocation string
+}
+
+// GeneralOptions contains information for general configuration options
+type GeneralOptions struct {
+	DelayBetweenMassages int64
+}