119 lines
2.5 KiB
Go
119 lines
2.5 KiB
Go
package service
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import (
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"net/url"
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"regexp"
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"strings"
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"time"
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"unicode/utf8"
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"git.iioio.com/freefire/jiang13-forum/model"
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)
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var (
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imgSrcRe = regexp.MustCompile(`(?i)<img[^>]+src=["']([^"']+)["']`)
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)
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// SitemapURL 站点地图条目
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type SitemapURL struct {
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Loc string
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LastMod time.Time
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ChangeFreq string
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Priority string
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}
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// SitePublicBaseURL 公开站点根地址（无尾斜杠）
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// 优先管理后台 OIDC 中的 ROOT_URL，否则根据请求 Host 推断
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func (s *ForumSettingsService) SitePublicBaseURL(requestOrigin string) string {
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root := normalizeRootURL(s.getString(SettingOIDCRootURL, ""))
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if root == "" {
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root = normalizeRootURL(requestOrigin)
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}
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return strings.TrimRight(root, "/")
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}
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// AbsoluteURL 将相对路径拼成绝对 URL
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func AbsoluteURL(base, pathOrURL string) string {
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pathOrURL = strings.TrimSpace(pathOrURL)
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if pathOrURL == "" {
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return ""
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}
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if strings.HasPrefix(pathOrURL, "http://") || strings.HasPrefix(pathOrURL, "https://") {
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return pathOrURL
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}
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base = strings.TrimRight(base, "/")
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if !strings.HasPrefix(pathOrURL, "/") {
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pathOrURL = "/" + pathOrURL
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}
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return base + pathOrURL
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}
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// TruncateRunes 按 rune 截断并加省略号
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func TruncateRunes(s string, max int) string {
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s = strings.TrimSpace(s)
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if max <= 0 || s == "" {
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return s
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}
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if utf8.RuneCountInString(s) <= max {
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return s
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}
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runes := []rune(s)
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if max < 2 {
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return string(runes[:max])
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}
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return string(runes[:max-1]) + "…"
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}
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// ExcerptFromHTML 从 HTML 生成摘要（剥离标签）
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func ExcerptFromHTML(htmlContent string, maxRunes int) string {
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plain := StripHTMLForSearch(htmlContent)
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return TruncateRunes(plain, maxRunes)
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}
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// FirstImageURL 提取正文中第一张图片的 src
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func FirstImageURL(htmlContent string) string {
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m := imgSrcRe.FindStringSubmatch(htmlContent)
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if len(m) < 2 {
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return ""
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}
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src := strings.TrimSpace(m[1])
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// 忽略 data: 内联图
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if strings.HasPrefix(src, "data:") {
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return ""
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}
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return src
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}
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// DisplayName 用户展示名
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func DisplayName(u *model.User) string {
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if u == nil {
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return ""
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}
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if n := strings.TrimSpace(u.Nickname); n != "" {
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return n
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}
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return strings.TrimSpace(u.Username)
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}
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// QueryBoardHome 板块首页相对路径
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func QueryBoardHome(boardID uint) string {
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if boardID == 0 {
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return "/"
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}
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return "/?board=" + url.QueryEscape(itoaUint(boardID))
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}
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func itoaUint(n uint) string {
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if n == 0 {
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return "0"
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}
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var buf [20]byte
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i := len(buf)
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for n > 0 {
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i--
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buf[i] = byte('0' + n%10)
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n /= 10
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}
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return string(buf[i:])
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}
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