feat: change detector

pkg/config/__mocks__/testLoadCanFindFile.yaml

@@ -0,0 +1,16 @@
+---
+ip_provider:
+  type: plain
+  config:
+    url: https://ifconfig.me
+dns_provider:
+  type: ionos
+  config:
+    api_key: exampleAPIKey
+    base_url: https://example.com
+domains:
+  - tld: example.com
+    subdomains:
+      - "@"
+      - www
+check_interval: 0 0 0/6 * * * *

pkg/config/config.go

@@ -0,0 +1,43 @@
+package config
+
+import (
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+type DomainConfig struct {
+	TLD        string   `yaml:"tld"`
+	Subdomains []string `yaml:"subdomains"`
+}
+
+type Config struct {
+	ExternalIPProvider ExternalIpProviderConfig `yaml:"ip_provider"`
+	DNSProvider        DNSProviderConfig        `yaml:"dns_provider"`
+	Domains            []DomainConfig           `yaml:"domains"`
+	CheckInterval      string                   `yaml:"check_interval"`
+}
+
+type ExternalIpProviderConfig struct {
+	Type           string    `yaml:"type"`
+	ProviderConfig yaml.Node `yaml:"config"`
+}
+
+type DNSProviderConfig struct {
+	Type           string    `yaml:"type"`
+	ProviderConfig yaml.Node `yaml:"config"`
+}
+
+func (c *Config) Load(filePath string) error {
+	err := yaml.Unmarshal([]byte(filePath), c)
+	if err != nil {
+		inputConfig, err := os.ReadFile(filePath)
+		if err != nil {
+			return err
+		}
+
+		return yaml.Unmarshal(inputConfig, c)
+	}
+
+	return err
+}

pkg/config/config_test.go

@@ -0,0 +1,65 @@
+package config
+
+import (
+	"testing"
+)
+
+func TestLoad(t *testing.T) {
+	t.Run("Can find file", testLoadCanFindFile())
+	t.Run("Cannot find file", testLoadCannotFindFile())
+	t.Run("Unmarshals from direct input", testLoadUnmarshalsFromDirectInput())
+}
+
+func testLoadCanFindFile() func(t *testing.T) {
+	return func(t *testing.T) {
+
+		c := Config{}
+		err := c.Load("./__mocks__/testLoadCanFindFile.yaml")
+
+		want := c.DNSProvider.Type == "ionos" && c.ExternalIPProvider.Type == "plain"
+
+		if !want || err != nil {
+			t.Fatalf("DnsProviderName couldn't be properly loaded or unmarshaled, Load() = %v, want %v", err, want)
+		}
+	}
+}
+
+func testLoadCannotFindFile() func(t *testing.T) {
+	return func(t *testing.T) {
+		c := Config{}
+		err := c.Load("nonexistent.yaml")
+		want := err != nil
+
+		if !want {
+			t.Fatalf("Config didn't throw an error")
+		}
+	}
+}
+
+func testLoadUnmarshalsFromDirectInput() func(t *testing.T) {
+	return func(t *testing.T) {
+		c := Config{}
+		err := c.Load(`---
+ip_provider:
+  type: plain
+  config:
+    url: https://ifconfig.me
+dns_provider:
+  type: ionos
+  config:
+    api_key: exampleAPIKey
+    base_url: https://example.com
+domains:
+  - tld: example.com
+    subdomains:
+      - "@"
+      - www
+check_interval: 0 0 0/6 * * * *`)
+
+		want := c.DNSProvider.Type == "ionos" && c.ExternalIPProvider.Type == "plain"
+
+		if !want || err != nil {
+			t.Fatalf("DnsProviderName couldn't be properly loaded or unmarshaled, Load() = %v, want %v", err, want)
+		}
+	}
+}