atom.go

package main

// https://validator.w3.org/feed/docs/atom.html
type Atom struct {
	XMLName string      `xml:"feed"`
	NS      string      `xml:"xmlns,attr"`
	ID      string      `xml:"id"`
	Title   string      `xml:"title"`
	Updated string      `xml:"updated"`
	Links   []AtomLink  `xml:"link"`
	Entries []AtomEntry `xml:"entry"`
}

type AtomEntry struct {
	Title     CDATA        `xml:"title"`
	Links     []AtomLink   `xml:"link"`
	Author    string       `xml:"author>name"`
	Content   *AtomContent `xml:"content,omitempty"`
	Updated   string       `xml:"updated"`
	Published string       `xml:"published"`
	ID        string       `xml:"id"`
}

type AtomContent struct {
	Type  string `xml:"type,attr"`
	Value string `xml:",cdata"`
}

type AtomLink struct {
	Reference    string `xml:"href,attr"`
	Relationship string `xml:"rel,attr,omitempty"`
	Type         string `xml:"type,attr,omitempty"`
}

func NewAtom(results *AlgoliaSearchResponse, op *OutputParams) *Atom {
	atom := Atom{
		NS:      NSAtom,
		ID:      op.SelfLink,
		Title:   op.Title,
		Updated: Timestamp("atom", UTCNow()),
		Links: []AtomLink{
			{op.SelfLink, "self", "application/atom+xml"},
		},
	}

	for _, hit := range results.Hits {
		entry := AtomEntry{
			ID:        hit.GetPermalink(),
			Title:     CDATA{hit.GetTitle()},
			Updated:   Timestamp("atom", hit.GetCreatedAt()),
			Published: Timestamp("atom", hit.GetCreatedAt()),
			Links: []AtomLink{
				{hit.GetURL(op.LinkTo), "alternate", ""},
			},
			Author: hit.Author,
		}

		if op.Description != descriptionDisabledFlag {
			entry.Content = &AtomContent{"html", hit.GetDescription()}
		}

		atom.Entries = append(atom.Entries, entry)
	}

	return &atom
}