allow choosing attachment color

Dockerfile

@@ -10,6 +10,7 @@ FROM alpine:latest as synology-notifications
 EXPOSE 8080
 ENV API_KEY=
 ENV SLACK_WEBHOOK=
+ENV SLACK_ATTACHMENT_COLOR=
 ENV LISTEN_PORT=8080
 RUN apk --no-cache add ca-certificates
 COPY --from=builder synology-notifications/synology-notifications /

README.md

@@ -1,21 +1,22 @@
 # synology-notifications
 
-Receive notifcations from Synology and forward them to the notifcation service of your choice
+Receive notifications from Synology and forward them to the notification service of your choice
 
-## Supported notifcation services
+## Supported notification services
 
 - Slack
 
 ## Service settings
 
-Settings are supplied by setting envrionment variables
+Settings are supplied by setting environment variables
 
-- `API_KEY`: A minum of 32 character api key that Synology server needs to use to auth to this services api
+- `API_KEY`: A minimum of 32 character api key that Synology server needs to use to auth to this services api
 - `LISTEN_PORT`: Default `8080`. The port the service will listen on 
 
 ## Slack settings
 
 - `SLACK_WEBHOOK`: URL for the Slack web hook
+- `SLACK_ATTACHMENT_COLOR`: Color to use for the attachments can use hex `#36a64f`
 
 ## Cmd
 
@@ -29,28 +30,28 @@ listening on port 8080
 ## Docker
 
 ```bash
-docker run -e API_KEY='LO45UXS%amLAWJn6CwJ1koaXW&7pY9#Z' -e SLACK_WEBHOOK='https://slack.com/myWebHookUrl' ryancurrah/synology-notifications:latest
+docker run -e API_KEY='LO45UXS%amLAWJn6CwJ1koaXW&7pY9#Z' -e SLACK_WEBHOOK='https://slack.com/myWebHookUrl' -p 8080:8080 ryancurrah/synology-notifications:latest
 listening on port 8080
 ```
 
 ## Setting up Synology
 
 1. Login to Diskstation
 2. Go to `Control Pannel` > `Notification` > `SMS`
-3. Check `Enable SMS Notifcations`
+3. Check `Enable SMS Notifications`
 4. Click `Add SMS Provider` to create a new SMS provider which will be the `synology-notifications` service. (**NOTE**: We will not actually be using `SMS`)
     1. **Provider Name**: `synology-notifications`
     2. **SMS URL**: `http://<ip address of synology-notifications service>:8080`
     3. **HTTP Method**: `POST`
 5. Click  `Add` and set the `Parameter` to `api_key` and leave Value empty then click `Next`
-6. Click `Add` and set the `Paramater` to `phone_number` and leave Value empty (**NOTE**: Synology requires this field to exist even though were not going to use it)
-7. Click `Add` and set the `Paramater` to `message` set the Value to `Hello world` (Synology requires a sample value) and click `Next`
+6. Click `Add` and set the `Parameter` to `phone_number` and leave Value empty (**NOTE**: Synology requires this field to exist even though were not going to use it)
+7. Click `Add` and set the `Parameter` to `message` set the Value to `Hello world` (Synology requires a sample value) and click `Next`
 8. Set the type of the `api_key` Parameter to `API Key`
 9. Set the type of the `phone_number` Parameter to `Phone Number`
 10. Set the type of the `message` Parameter to `Message content` and click `Apply`
 11. Select `synology-notifications` from the `SMS service provider` dropdown
 12. In the `API Key` field paste the API Key you choose for the service and click `Apply`
-13. Test the notifcation service by clicking `Send a test SMS message`
+13. Test the notification service by clicking `Send a test SMS message`
 
 ## Setting up Synology with screenshots
 

main.go

@@ -20,16 +20,17 @@ type SynologyMessage struct {
 
 type AppConfig struct {
 	ListenPort string `env:"LISTEN_PORT" envDefault:"8080"`
-	ApiKey     string `env:"API_KEY,required"`
+	APIKey     string `env:"API_KEY,required"`
 }
 
 type SlackConfig struct {
 	Webhook string `env:"SLACK_WEBHOOK,required"`
+	Color   string `env:"SLACK_ATTACHMENT_COLOR" envDefault:"warning"`
 }
 
-// PostHandler send notifcations from synology to slack
+// PostHandler send notifications from synology to slack
 func PostHandler(w http.ResponseWriter, r *http.Request) {
-	if r.Header.Get("api_key") != appConfig.ApiKey {
+	if r.Header.Get("api_key") != appConfig.APIKey {
 		http.Error(w, "invalid api key", http.StatusUnauthorized)
 		log.Printf("invalid api key")
 		return
@@ -51,7 +52,7 @@ func PostHandler(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 
-		msg := slack.WebhookMessage{Attachments: []slack.Attachment{{Color: "warning", Text: fmt.Sprintf("%s", synologyMessage.Message)}}}
+		msg := slack.WebhookMessage{Attachments: []slack.Attachment{{Color: slackConfig.Color, Text: fmt.Sprintf("%s", synologyMessage.Message)}}}
 
 		err = slack.PostWebhook(slackConfig.Webhook, &msg)
 		if err != nil {
@@ -76,8 +77,8 @@ func main() {
 		panic(err)
 	}
 
-	if len(appConfig.ApiKey) < 32 {
-		panic(fmt.Errorf("api key not long enough it should be 32 characters long not %d", len(appConfig.ApiKey)))
+	if len(appConfig.APIKey) < 32 {
+		panic(fmt.Errorf("api key not long enough it should be 32 characters long not %d", len(appConfig.APIKey)))
 	}
 
 	mux := http.NewServeMux()