snapshot of https://github.com/ThreeDotsLabs/watermill.git (master, 2026-09-15; blobs > 131072B omitted)

_examples/real-world-examples/server-sent-events/server/models.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"regexp"
+	"strings"
+	"time"
+)
+
+// Note that in a real application using both "json" and "bson" tags in the same structure is strongly discouraged.
+// We use common models for database storage and HTTP API just to make this example simple and easy to grasp.
+// See our article about the idea behind this: https://threedots.tech/post/things-to-know-about-dry/
+
+type Post struct {
+	ID      string   `json:"id" bson:"id"`
+	Title   string   `json:"title" bson:"title"`
+	Content string   `json:"content" bson:"content"`
+	Author  string   `json:"author" bson:"author"`
+	Tags    []string `json:"tags" bson:"tags"`
+}
+
+func NewPost(id, title, content, author string) Post {
+	pattern := regexp.MustCompile("#([a-zA-Z0-9]+)")
+	matches := pattern.FindAllStringSubmatch(content, -1)
+
+	var tags []string
+	tagsMap := map[string]struct{}{}
+
+	for _, tag := range matches {
+		tagSlug := strings.ToLower(tag[1])
+
+		_, ok := tagsMap[tagSlug]
+		if ok {
+			continue
+		}
+
+		tagsMap[tagSlug] = struct{}{}
+		tags = append(tags, tagSlug)
+	}
+
+	return Post{
+		ID:      id,
+		Title:   title,
+		Content: content,
+		Author:  author,
+		Tags:    tags,
+	}
+}
+
+type Feed struct {
+	Name  string `json:"name" bson:"_id"`
+	Posts []Post `json:"posts" bson:"posts"`
+}
+
+type PostCreated struct {
+	Post Post `json:"post"`
+
+	OccurredAt time.Time `json:"occurred_at"`
+}
+
+type PostUpdated struct {
+	OriginalPost Post `json:"original_post"`
+	NewPost      Post `json:"new_post"`
+
+	OccurredAt time.Time `json:"occurred_at"`
+}
+
+type FeedUpdated struct {
+	Name string `json:"name"`
+
+	OccurredAt time.Time `json:"occurred_at"`
+}