feat: SEO backend output (2/4)

internal/domain/article/seoStatus.go

@@ -0,0 +1,53 @@
+package article
+
+const (
+	SEOStatusReady       = "ready"
+	SEOStatusSuggestions = "suggestions"
+	SEOStatusHidden      = "hidden"
+
+	SEOTitleMaxRunes       = 60
+	SEODescriptionMinRunes = 70
+	SEODescriptionMaxRunes = 160
+	SEOSlugMaxRunes        = 75
+	SEOHeadingMinTextRunes = 1000
+	SEOShortBodyRunes      = 300
+
+	SEOFieldTitle       = "seo_title"
+	SEOFieldDescription = "seo_description"
+	SEOFieldCoverAlt    = "cover_image_alt"
+	SEOFieldCoverID     = "cover_image_id"
+	SEOFieldSlug        = "slug"
+	SEOFieldAuthors     = "author_ids"
+	SEOFieldBody        = "body"
+)
+
+type SEOSuggestion struct {
+	Code   string         `json:"code"`
+	Field  string         `json:"field"`
+	Params map[string]int `json:"params"`
+}
+
+type SEOAssessment struct {
+	Status      string          `json:"status"`
+	Suggestions []SEOSuggestion `json:"suggestions"`
+}
+
+type SEOSummary struct {
+	Status      string
+	Suggestions int
+}
+
+func (a SEOAssessment) Summary() SEOSummary {
+	return SEOSummary{Status: a.Status, Suggestions: len(a.Suggestions)}
+}
+
+type SEOSlugCheck struct {
+	Available  bool    `json:"available"`
+	Suggestion *string `json:"suggestion"`
+}
+
+type SEOCheck struct {
+	Status      string          `json:"status"`
+	Suggestions []SEOSuggestion `json:"suggestions"`
+	Slug        SEOSlugCheck    `json:"slug"`
+}