Compute slug in CreateOrUpdateDashboard

src/grafana/dashboards.go

 import (
 	"encoding/json"
 	"fmt"
+
+	"grafana/helpers"
 )
 
 // dbSearchResponse represents an element of the response to a dashboard search
 // existing one. The Grafana API decides whether to create or update based on the
 // "id" attribute in the dashboard's JSON: If it's unkown or null, it's a
 // creation, else it's an update.
-// The slug is only used for error reporting, and can differ from the
-// dashboard's actual slug in its JSON content. However, it's recommended to use
-// the same in both places.
 // Returns an error if there was an issue generating the request body, performing
 // the request or decoding the response's body.
-func (c *Client) CreateOrUpdateDashboard(slug string, contentJSON []byte) (err error) {
+func (c *Client) CreateOrUpdateDashboard(contentJSON []byte) (err error) {
 	reqBody := dbCreateOrUpdateRequest{
 		Dashboard: rawJSON(contentJSON),
 		Overwrite: true,
 		return
 	}
 
+	slug, err := helpers.GetDashboardSlug(contentJSON)
+	if err != nil {
+		return
+	}
+
 	if respBody.Status != "success" && isHttpUnknownError {
 		return fmt.Errorf(
 			"Failed to update dashboard %s (%d %s): %s",

src/pusher/webhook.go

 		return err
 	}
 
-	// Remove the .json part
-	slug := strings.Split(filename, ".json")[0]
-
-	return grafanaClient.CreateOrUpdateDashboard(slug, fileContent)
+	return grafanaClient.CreateOrUpdateDashboard(fileContent)
 }
 
 // isIgnored checks whether the file must be ignored, by checking if there's an