94 lines
2.1 KiB
Go
94 lines
2.1 KiB
Go
package main
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import "encoding/xml"
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type opml struct {
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Head struct {
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Title string `xml:"title"`
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} `xml:"head"`
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Body Body `xml:"body"`
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}
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type Body struct {
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Outlines []Outline `xml:"outline"`
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}
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type Outline struct {
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Outlines []Outline `xml:"outline"`
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XmlUrl string `xml:"xmlUrl,attr,omitempty"`
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HtmlUrl string `xml:"htmlUrl,attr,omitempty"`
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}
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func (o *opml) ParseString(s string) error {
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return xml.Unmarshal([]byte(s), o)
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}
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func (o *opml) String() (string, error) {
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b, err := xml.Marshal(o)
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if err != nil {
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return "", err
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}
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return xml.Header + string(b), nil
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}
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type linksFromOpml struct {
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XMLLinks []string `json:"xmlLinks"`
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HTMLLinks []string `json:"htmlLinks"`
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}
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func removeDuplicates(s []string) []string {
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seen := make(map[string]struct{}, len(s))
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j := 0
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for _, v := range s {
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if _, ok := seen[v]; ok {
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continue
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}
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seen[v] = struct{}{}
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s[j] = v
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j++
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}
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return s[:j]
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}
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func ParseOpml(s string) (linksFromOpml, error) {
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// Get all the feeds from the OPML and return them as linksFromOpml
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opml := &opml{}
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err := opml.ParseString(s)
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if err != nil {
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return linksFromOpml{}, err
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}
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links := linksFromOpml{}
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for _, outline := range opml.Body.Outlines {
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links.XMLLinks = append(links.XMLLinks, outline.XmlUrl)
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links.HTMLLinks = append(links.HTMLLinks, outline.HtmlUrl)
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}
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// Also check outlines for nested outlines
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for _, outline := range opml.Body.Outlines {
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for _, nestedOutline := range outline.Outlines {
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links.XMLLinks = append(links.XMLLinks, nestedOutline.XmlUrl)
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links.HTMLLinks = append(links.HTMLLinks, nestedOutline.HtmlUrl)
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}
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}
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// Remove any empty strings
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for i := 0; i < len(links.XMLLinks); i++ {
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if links.XMLLinks[i] == "" {
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links.XMLLinks = append(links.XMLLinks[:i], links.XMLLinks[i+1:]...)
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i--
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}
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}
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for i := 0; i < len(links.HTMLLinks); i++ {
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if links.HTMLLinks[i] == "" {
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links.HTMLLinks = append(links.HTMLLinks[:i], links.HTMLLinks[i+1:]...)
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i--
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}
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}
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// Remove any duplicates
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links.XMLLinks = removeDuplicates(links.XMLLinks)
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links.HTMLLinks = removeDuplicates(links.HTMLLinks)
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return links, nil
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}
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