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-rw-r--r--vendor/github.com/dyatlov/go-opengraph/opengraph/opengraph.go365
1 files changed, 365 insertions, 0 deletions
diff --git a/vendor/github.com/dyatlov/go-opengraph/opengraph/opengraph.go b/vendor/github.com/dyatlov/go-opengraph/opengraph/opengraph.go
new file mode 100644
index 00000000..96feb78a
--- /dev/null
+++ b/vendor/github.com/dyatlov/go-opengraph/opengraph/opengraph.go
@@ -0,0 +1,365 @@
+package opengraph
+
+import (
+ "encoding/json"
+ "io"
+ "strconv"
+ "time"
+
+ "golang.org/x/net/html"
+ "golang.org/x/net/html/atom"
+)
+
+// Image defines Open Graph Image type
+type Image struct {
+ URL string `json:"url"`
+ SecureURL string `json:"secure_url"`
+ Type string `json:"type"`
+ Width uint64 `json:"width"`
+ Height uint64 `json:"height"`
+ draft bool `json:"-"`
+}
+
+// Video defines Open Graph Video type
+type Video struct {
+ URL string `json:"url"`
+ SecureURL string `json:"secure_url"`
+ Type string `json:"type"`
+ Width uint64 `json:"width"`
+ Height uint64 `json:"height"`
+ draft bool `json:"-"`
+}
+
+// Audio defines Open Graph Audio Type
+type Audio struct {
+ URL string `json:"url"`
+ SecureURL string `json:"secure_url"`
+ Type string `json:"type"`
+ draft bool `json:"-"`
+}
+
+// Article contain Open Graph Article structure
+type Article struct {
+ PublishedTime *time.Time `json:"published_time"`
+ ModifiedTime *time.Time `json:"modified_time"`
+ ExpirationTime *time.Time `json:"expiration_time"`
+ Section string `json:"section"`
+ Tags []string `json:"tags"`
+ Authors []*Profile `json:"authors"`
+}
+
+// Profile contains Open Graph Profile structure
+type Profile struct {
+ FirstName string `json:"first_name"`
+ LastName string `json:"last_name"`
+ Username string `json:"username"`
+ Gender string `json:"gender"`
+}
+
+// Book contains Open Graph Book structure
+type Book struct {
+ ISBN string `json:"isbn"`
+ ReleaseDate *time.Time `json:"release_date"`
+ Tags []string `json:"tags"`
+ Authors []*Profile `json:"authors"`
+}
+
+// OpenGraph contains facebook og data
+type OpenGraph struct {
+ isArticle bool
+ isBook bool
+ isProfile bool
+ Type string `json:"type"`
+ URL string `json:"url"`
+ Title string `json:"title"`
+ Description string `json:"description"`
+ Determiner string `json:"determiner"`
+ SiteName string `json:"site_name"`
+ Locale string `json:"locale"`
+ LocalesAlternate []string `json:"locales_alternate"`
+ Images []*Image `json:"images"`
+ Audios []*Audio `json:"audios"`
+ Videos []*Video `json:"videos"`
+ Article *Article `json:"article,omitempty"`
+ Book *Book `json:"book,omitempty"`
+ Profile *Profile `json:"profile,omitempty"`
+}
+
+// NewOpenGraph returns new instance of Open Graph structure
+func NewOpenGraph() *OpenGraph {
+ return &OpenGraph{}
+}
+
+// ToJSON a simple wrapper around json.Marshal
+func (og *OpenGraph) ToJSON() ([]byte, error) {
+ return json.Marshal(og)
+}
+
+// String return json representation of structure, or error string
+func (og *OpenGraph) String() string {
+ data, err := og.ToJSON()
+
+ if err != nil {
+ return err.Error()
+ }
+
+ return string(data[:])
+}
+
+// ProcessHTML parses given html from Reader interface and fills up OpenGraph structure
+func (og *OpenGraph) ProcessHTML(buffer io.Reader) error {
+ z := html.NewTokenizer(buffer)
+ for {
+ tt := z.Next()
+ switch tt {
+ case html.ErrorToken:
+ if z.Err() == io.EOF {
+ return nil
+ }
+ return z.Err()
+ case html.StartTagToken, html.SelfClosingTagToken, html.EndTagToken:
+ name, hasAttr := z.TagName()
+ if atom.Lookup(name) == atom.Body {
+ return nil // OpenGraph is only in head, so we don't need body
+ }
+ if atom.Lookup(name) != atom.Meta || !hasAttr {
+ continue
+ }
+ m := make(map[string]string)
+ var key, val []byte
+ for hasAttr {
+ key, val, hasAttr = z.TagAttr()
+ m[atom.String(key)] = string(val)
+ }
+ og.ProcessMeta(m)
+ }
+ }
+}
+
+func (og *OpenGraph) ensureHasVideo() {
+ if len(og.Videos) > 0 {
+ return
+ }
+ og.Videos = append(og.Videos, &Video{draft: true})
+}
+
+func (og *OpenGraph) ensureHasImage() {
+ if len(og.Images) > 0 {
+ return
+ }
+ og.Images = append(og.Images, &Image{draft: true})
+}
+
+func (og *OpenGraph) ensureHasAudio() {
+ if len(og.Audios) > 0 {
+ return
+ }
+ og.Audios = append(og.Audios, &Audio{draft: true})
+}
+
+// ProcessMeta processes meta attributes and adds them to Open Graph structure if they are suitable for that
+func (og *OpenGraph) ProcessMeta(metaAttrs map[string]string) {
+ switch metaAttrs["property"] {
+ case "og:description":
+ og.Description = metaAttrs["content"]
+ case "og:type":
+ og.Type = metaAttrs["content"]
+ switch og.Type {
+ case "article":
+ og.isArticle = true
+ case "book":
+ og.isBook = true
+ case "profile":
+ og.isProfile = true
+ }
+ case "og:title":
+ og.Title = metaAttrs["content"]
+ case "og:url":
+ og.URL = metaAttrs["content"]
+ case "og:determiner":
+ og.Determiner = metaAttrs["content"]
+ case "og:site_name":
+ og.SiteName = metaAttrs["content"]
+ case "og:locale":
+ og.Locale = metaAttrs["content"]
+ case "og:locale:alternate":
+ og.LocalesAlternate = append(og.LocalesAlternate, metaAttrs["content"])
+ case "og:audio":
+ if len(og.Audios)>0 && og.Audios[len(og.Audios)-1].draft {
+ og.Audios[len(og.Audios)-1].URL = metaAttrs["content"]
+ og.Audios[len(og.Audios)-1].draft = false
+ } else {
+ og.Audios = append(og.Audios, &Audio{URL: metaAttrs["content"]})
+ }
+ case "og:audio:secure_url":
+ og.ensureHasAudio()
+ og.Audios[len(og.Audios)-1].SecureURL = metaAttrs["content"]
+ case "og:audio:type":
+ og.ensureHasAudio()
+ og.Audios[len(og.Audios)-1].Type = metaAttrs["content"]
+ case "og:image":
+ if len(og.Images)>0 && og.Images[len(og.Images)-1].draft {
+ og.Images[len(og.Images)-1].URL = metaAttrs["content"]
+ og.Images[len(og.Images)-1].draft = false
+ } else {
+ og.Images = append(og.Images, &Image{URL: metaAttrs["content"]})
+ }
+ case "og:image:url":
+ og.ensureHasImage()
+ og.Images[len(og.Images)-1].URL = metaAttrs["content"]
+ case "og:image:secure_url":
+ og.ensureHasImage()
+ og.Images[len(og.Images)-1].SecureURL = metaAttrs["content"]
+ case "og:image:type":
+ og.ensureHasImage()
+ og.Images[len(og.Images)-1].Type = metaAttrs["content"]
+ case "og:image:width":
+ w, err := strconv.ParseUint(metaAttrs["content"], 10, 64)
+ if err == nil {
+ og.ensureHasImage()
+ og.Images[len(og.Images)-1].Width = w
+ }
+ case "og:image:height":
+ h, err := strconv.ParseUint(metaAttrs["content"], 10, 64)
+ if err == nil {
+ og.ensureHasImage()
+ og.Images[len(og.Images)-1].Height = h
+ }
+ case "og:video":
+ if len(og.Videos)>0 && og.Videos[len(og.Videos)-1].draft {
+ og.Videos[len(og.Videos)-1].URL = metaAttrs["content"]
+ og.Videos[len(og.Videos)-1].draft = false
+ } else {
+ og.Videos = append(og.Videos, &Video{URL: metaAttrs["content"]})
+ }
+ case "og:video:url":
+ og.ensureHasVideo()
+ og.Videos[len(og.Videos)-1].URL = metaAttrs["content"]
+ case "og:video:secure_url":
+ og.ensureHasVideo()
+ og.Videos[len(og.Videos)-1].SecureURL = metaAttrs["content"]
+ case "og:video:type":
+ og.ensureHasVideo()
+ og.Videos[len(og.Videos)-1].Type = metaAttrs["content"]
+ case "og:video:width":
+ w, err := strconv.ParseUint(metaAttrs["content"], 10, 64)
+ if err == nil {
+ og.ensureHasVideo()
+ og.Videos[len(og.Videos)-1].Width = w
+ }
+ case "og:video:height":
+ h, err := strconv.ParseUint(metaAttrs["content"], 10, 64)
+ if err == nil {
+ og.ensureHasVideo()
+ og.Videos[len(og.Videos)-1].Height = h
+ }
+ default:
+ if og.isArticle {
+ og.processArticleMeta(metaAttrs)
+ } else if og.isBook {
+ og.processBookMeta(metaAttrs)
+ } else if og.isProfile {
+ og.processProfileMeta(metaAttrs)
+ }
+ }
+}
+
+func (og *OpenGraph) processArticleMeta(metaAttrs map[string]string) {
+ if og.Article == nil {
+ og.Article = &Article{}
+ }
+ switch metaAttrs["property"] {
+ case "article:published_time":
+ t, err := time.Parse(time.RFC3339, metaAttrs["content"])
+ if err == nil {
+ og.Article.PublishedTime = &t
+ }
+ case "article:modified_time":
+ t, err := time.Parse(time.RFC3339, metaAttrs["content"])
+ if err == nil {
+ og.Article.ModifiedTime = &t
+ }
+ case "article:expiration_time":
+ t, err := time.Parse(time.RFC3339, metaAttrs["content"])
+ if err == nil {
+ og.Article.ExpirationTime = &t
+ }
+ case "article:section":
+ og.Article.Section = metaAttrs["content"]
+ case "article:tag":
+ og.Article.Tags = append(og.Article.Tags, metaAttrs["content"])
+ case "article:author:first_name":
+ if len(og.Article.Authors) == 0 {
+ og.Article.Authors = append(og.Article.Authors, &Profile{})
+ }
+ og.Article.Authors[len(og.Article.Authors)-1].FirstName = metaAttrs["content"]
+ case "article:author:last_name":
+ if len(og.Article.Authors) == 0 {
+ og.Article.Authors = append(og.Article.Authors, &Profile{})
+ }
+ og.Article.Authors[len(og.Article.Authors)-1].LastName = metaAttrs["content"]
+ case "article:author:username":
+ if len(og.Article.Authors) == 0 {
+ og.Article.Authors = append(og.Article.Authors, &Profile{})
+ }
+ og.Article.Authors[len(og.Article.Authors)-1].Username = metaAttrs["content"]
+ case "article:author:gender":
+ if len(og.Article.Authors) == 0 {
+ og.Article.Authors = append(og.Article.Authors, &Profile{})
+ }
+ og.Article.Authors[len(og.Article.Authors)-1].Gender = metaAttrs["content"]
+ }
+}
+
+func (og *OpenGraph) processBookMeta(metaAttrs map[string]string) {
+ if og.Book == nil {
+ og.Book = &Book{}
+ }
+ switch metaAttrs["property"] {
+ case "book:release_date":
+ t, err := time.Parse(time.RFC3339, metaAttrs["content"])
+ if err == nil {
+ og.Book.ReleaseDate = &t
+ }
+ case "book:isbn":
+ og.Book.ISBN = metaAttrs["content"]
+ case "book:tag":
+ og.Book.Tags = append(og.Book.Tags, metaAttrs["content"])
+ case "book:author:first_name":
+ if len(og.Book.Authors) == 0 {
+ og.Book.Authors = append(og.Book.Authors, &Profile{})
+ }
+ og.Book.Authors[len(og.Book.Authors)-1].FirstName = metaAttrs["content"]
+ case "book:author:last_name":
+ if len(og.Book.Authors) == 0 {
+ og.Book.Authors = append(og.Book.Authors, &Profile{})
+ }
+ og.Book.Authors[len(og.Book.Authors)-1].LastName = metaAttrs["content"]
+ case "book:author:username":
+ if len(og.Book.Authors) == 0 {
+ og.Book.Authors = append(og.Book.Authors, &Profile{})
+ }
+ og.Book.Authors[len(og.Book.Authors)-1].Username = metaAttrs["content"]
+ case "book:author:gender":
+ if len(og.Book.Authors) == 0 {
+ og.Book.Authors = append(og.Book.Authors, &Profile{})
+ }
+ og.Book.Authors[len(og.Book.Authors)-1].Gender = metaAttrs["content"]
+ }
+}
+
+func (og *OpenGraph) processProfileMeta(metaAttrs map[string]string) {
+ if og.Profile == nil {
+ og.Profile = &Profile{}
+ }
+ switch metaAttrs["property"] {
+ case "profile:first_name":
+ og.Profile.FirstName = metaAttrs["content"]
+ case "profile:last_name":
+ og.Profile.LastName = metaAttrs["content"]
+ case "profile:username":
+ og.Profile.Username = metaAttrs["content"]
+ case "profile:gender":
+ og.Profile.Gender = metaAttrs["content"]
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-20 06:16:05 +0000