api,frontend: add Akismet spam flagging integration

api/akismet.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"github.com/adtac/go-akismet/akismet"
+	"os"
+)
+
+func isSpam(domain string, userIp string, userAgent string, name string, email string, url string, markdown string) bool {
+	akismetKey := os.Getenv("AKISMET_KEY")
+	if akismetKey == "" {
+		return false
+	}
+
+	res, err := akismet.Check(&akismet.Comment{
+		Blog:               domain,
+		UserIP:             userIp,
+		UserAgent:          userAgent,
+		CommentType:        "comment",
+		CommentAuthor:      name,
+		CommentAuthorEmail: email,
+		CommentAuthorURL:   url,
+		CommentContent:     markdown,
+	}, akismetKey)
+
+	if err != nil {
+		logger.Errorf("error: cannot validate commenet using Akismet: %v", err)
+		return true
+	}
+
+	return res
+}