First implementation of an atom feed

2024-10-13 17:19:40 +02:00
parent 520c2de196
commit 92c794d070
23 changed files with 805 additions and 0 deletions
--- a/entry.go
+++ b/entry.go
@@ -0,0 +1,138 @@
+package atomfeed
+
+import (
+	"encoding/xml"
+	"errors"
+	"fmt"
+)
+
+type Entry struct {
+	*CommonAttributes
+	Authors      []*Person           `xml:"author,omitempty"`
+	Categories   []*Category         `xml:"category,omitempty"`
+	Content      *Content            `xml:"content,omitempty"`
+	Contributors []*Person           `xml:"contributors,omitempty"`
+	ID           *ID                 `xml:"id"`
+	Links        []*Link             `xml:"link,omitempty"`
+	Published    *Date               `xml:"published,omitempty"`
+	Rights       *Text               `xml:"rights,omitempty"`
+	Source       *Source             `xml:"source,omitempty"`
+	Summary      *Text               `xml:"summary,omitempty"`
+	Title        *Text               `xml:"title"`
+	Updated      *Date               `xml:"updated"`
+	Extensions   []*ExtensionElement `xml:",any"`
+}
+
+func (e *Entry) checkAuthors() error {
+	if e.Authors == nil {
+		if e.Source.Authors == nil {
+			return errors.New("no authors set in entry")
+		}
+	} else {
+		for i, a := range e.Authors {
+			if err := a.Check(); err != nil {
+				return fmt.Errorf("author element %v of entry: %v", i, err)
+			}
+		}
+	}
+
+	return nil
+}
+
+func (e *Entry) Check() error {
+	if e.ID == nil {
+		return errors.New("no id element of entry")
+	} else {
+		if err := e.ID.Check(); err != nil {
+			return fmt.Errorf("id element of entry: %v", err)
+		}
+	}
+
+	if err := e.checkAuthors(); err != nil {
+		return fmt.Errorf("entry %v: %v", e.ID.URI, err)
+	}
+
+	if e.Categories != nil {
+		for i, c := range e.Categories {
+			if err := c.Check(); err != nil {
+				return fmt.Errorf("category element %v of entry %v: %v", i, e.ID.URI, err)
+			}
+		}
+	}
+
+	if e.Content != nil {
+		if err := (*e.Content).Check(); err != nil {
+			return fmt.Errorf("content element of entry %v: %v", e.ID.URI, err)
+		}
+	}
+
+	if e.Contributors != nil {
+		for i, c := range e.Contributors {
+			if err := c.Check(); err != nil {
+				return fmt.Errorf("contributor element %v of entry %v: %v", i, e.ID.URI, err)
+			}
+		}
+	}
+
+	if e.Links != nil {
+		for i, l := range e.Links {
+			if err := l.Check(); err != nil {
+				return fmt.Errorf("link element %v of entry %v: %v", i, e.ID.URI, err)
+			}
+		}
+	}
+
+	if e.Published != nil {
+		if err := e.Published.Check(); err != nil {
+			return fmt.Errorf("published element of entry %v: %v", e.ID.URI, err)
+		}
+	}
+
+	if e.Rights != nil {
+		if err := (*e.Rights).Check(); err != nil {
+			return fmt.Errorf("rights element of entry %v: %v", e.ID.URI, err)
+		}
+	}
+
+	if e.Source != nil {
+		if err := e.Source.Check(); err != nil {
+			return fmt.Errorf("source element of entry %v: %v", e.ID.URI, err)
+		}
+	}
+
+	if e.Summary != nil {
+		if err := (*e.Summary).Check(); err != nil {
+			return fmt.Errorf("summary element of entry %v: %v", e.ID.URI, err)
+		}
+	}
+
+	if e.Title == nil {
+		return fmt.Errorf("no title element of entry %v", e.ID.URI)
+	} else {
+		if err := (*e.Title).Check(); err != nil {
+			return fmt.Errorf("title element of entry %v: %v", e.ID.URI, err)
+		}
+	}
+
+	if e.Updated == nil {
+		return fmt.Errorf("no updated element of entry %v", e.ID.URI)
+	} else {
+		if err := e.Updated.Check(); err != nil {
+			return fmt.Errorf("updated element of entry %v: %v", e.ID.URI, err)
+		}
+	}
+
+	if e.Extensions != nil {
+		for i, x := range e.Extensions {
+			if err := x.Check(); err != nil {
+				return fmt.Errorf("extension element %v of entry %v: %v", i, e.ID.URI, err)
+			}
+		}
+	}
+
+	return nil
+}
+
+func (e *Entry) AddExtension(name string, value any) {
+	e.Extensions = append(e.Extensions, &ExtensionElement{XMLName: xml.Name{Local: name}, Value: value})
+}