138 lines
3.2 KiB
Go
138 lines
3.2 KiB
Go
package mf
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import (
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"brainbaking.com/go-jamming/common"
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"strings"
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"time"
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"willnorris.com/go/microformats"
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)
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const (
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DateFormat = "2006-01-02T15:04:05"
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)
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type IndiewebAuthor struct {
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Name string `json:"name"`
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Picture string `json:"picture"`
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}
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type IndiewebData struct {
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Author IndiewebAuthor `json:"author"`
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Name string `json:"name"`
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Content string `json:"content"`
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Published string `json:"published"`
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Url string `json:"url"`
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IndiewebType string `json:"type"`
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Source string `json:"source"`
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Target string `json:"target"`
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}
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func PublishedNow(utcOffset int) string {
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return common.Now().UTC().Add(time.Duration(utcOffset) * time.Minute).Format("2006-01-02T15:04:05")
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}
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func shorten(txt string) string {
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if len(txt) <= 250 {
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return txt
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}
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return txt[0:250] + "..."
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}
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// Go stuff: entry.Properties["name"][0].(string),
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// JS stuff: hEntry.properties?.name?.[0]
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// The problem: convoluted syntax and no optional chaining!
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func Str(mf *microformats.Microformat, key string) string {
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val := mf.Properties[key]
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if len(val) == 0 {
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return ""
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}
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str, ok := val[0].(string)
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if !ok {
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// in very weird cases, it could be a map holding a value, like in mf2's "photo"
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valMap, ok2 := val[0].(map[string]string)
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if !ok2 {
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str = ""
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}
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str = valMap["value"]
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}
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return str
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}
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func Map(mf *microformats.Microformat, key string) map[string]string {
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val := mf.Properties[key]
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if len(val) == 0 {
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return map[string]string{}
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}
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mapVal, ok := val[0].(map[string]string)
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if !ok {
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return map[string]string{}
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}
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return mapVal
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}
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func Prop(mf *microformats.Microformat, key string) *microformats.Microformat {
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val := mf.Properties[key]
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if len(val) == 0 {
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return µformats.Microformat{
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Properties: map[string][]interface{}{},
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}
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}
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return val[0].(*microformats.Microformat)
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}
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func DeterminePublishedDate(hEntry *microformats.Microformat, utcOffset int) string {
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publishedDate := Str(hEntry, "published")
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if publishedDate == "" {
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return PublishedNow(utcOffset)
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}
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return publishedDate
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}
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func DetermineAuthorName(hEntry *microformats.Microformat) string {
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authorName := Str(Prop(hEntry, "author"), "name")
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if authorName == "" {
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return Prop(hEntry, "author").Value
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}
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return authorName
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}
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func DetermineType(hEntry *microformats.Microformat) string {
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likeOf := Str(hEntry, "like-of")
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if likeOf != "" {
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return "like"
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}
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bookmarkOf := Str(hEntry, "bookmark-of")
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if bookmarkOf != "" {
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return "bookmark"
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}
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return "mention"
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}
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// Mastodon uids start with "tag:server", but we do want indieweb uids from other sources
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func DetermineUrl(hEntry *microformats.Microformat, source string) string {
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uid := Str(hEntry, "uid")
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if uid != "" && strings.HasPrefix(uid, "http") {
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return uid
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}
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url := Str(hEntry, "url")
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if url != "" {
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return url
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}
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return source
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}
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func DetermineContent(hEntry *microformats.Microformat) string {
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bridgyTwitterContent := Str(hEntry, "bridgy-twitter-content")
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if bridgyTwitterContent != "" {
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return shorten(bridgyTwitterContent)
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}
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summary := Str(hEntry, "summary")
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if summary != "" {
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return shorten(summary)
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}
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contentEntry := Map(hEntry, "content")["value"]
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return shorten(contentEntry)
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}
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