122 lines
3.9 KiB
Go
122 lines
3.9 KiB
Go
package handler
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import (
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"encoding/json"
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"html"
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"regexp"
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"strings"
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"unicode/utf8"
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"soul-api/internal/model"
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"gorm.io/gorm"
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)
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var (
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reHTMLScript = regexp.MustCompile(`(?is)<script[^>]*>.*?</script>`)
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reHTMLStyle = regexp.MustCompile(`(?is)<style[^>]*>.*?</style>`)
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reHTMLBr = regexp.MustCompile(`(?i)<\s*br\s*/?>`)
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reHTMLPClose = regexp.MustCompile(`(?i)</\s*p\s*>`)
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reHTMLTags = regexp.MustCompile(`<[^>]+>`)
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)
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// stripHTMLToPlainPreview 将正文 HTML 转为纯文本再截取，避免预览截在 <img 中间导致用户看到半截标签
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func stripHTMLToPlainPreview(s string) string {
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s = reHTMLScript.ReplaceAllString(s, " ")
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s = reHTMLStyle.ReplaceAllString(s, " ")
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s = reHTMLBr.ReplaceAllString(s, "\n")
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s = reHTMLPClose.ReplaceAllString(s, "\n")
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s = reHTMLTags.ReplaceAllString(s, "")
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s = html.UnescapeString(s)
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s = strings.NewReplacer("\r\n", "\n", "\r", "\n").Replace(s)
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return strings.TrimSpace(s)
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}
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// chapterPreviewPercent 章节单独 preview_percent 覆盖全局 unpaid_preview_percent
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func chapterPreviewPercent(db *gorm.DB, ch *model.Chapter) int {
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g := getUnpaidPreviewPercent(db)
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if ch != nil && ch.PreviewPercent != nil {
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p := *ch.PreviewPercent
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if p >= 1 && p <= 100 {
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return p
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}
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}
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return g
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}
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// previewContent 取内容的前 percent%（按纯文本 rune 计；原 HTML 先剥标签）——用于 H5 落地页等；小程序读章节接口应返回全文并由端上按渲染高度裁切。
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func previewContent(content string, percent int) string {
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work := content
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if strings.Contains(content, "<") && strings.Contains(content, ">") {
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work = stripHTMLToPlainPreview(content)
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}
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total := utf8.RuneCountInString(work)
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if total == 0 {
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return ""
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}
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if percent < 1 {
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percent = 1
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}
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if percent > 100 {
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percent = 100
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}
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limit := total * percent / 100
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if limit < 100 {
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limit = 100
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}
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const maxPreview = 500
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if limit > maxPreview {
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limit = maxPreview
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}
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if limit > total {
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limit = total
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}
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runes := []rune(work)
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return string(runes[:limit]) + "\n\n……"
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}
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func defaultReadPreviewUI() map[string]string {
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return map[string]string{
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"singlePageUnlockTitle": "解锁全文",
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"singlePagePayButtonText": "支付 ¥{price} 解锁全文",
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"singlePageExpandedHint": "预览页不能直接付款，务必先点底栏「前往小程序」。",
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"payTapModalTitle": "解锁说明",
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"payTapModalContent": "全文 ¥{price}。预览里无法完成支付：请先点屏幕底部「前往小程序」进入完整版，登录后再付款解锁。",
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"fullUnlockTitle": "",
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"fullUnlockDesc": "",
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"fullLockedProgressText": "",
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"fullPaywallTip": "转发给需要的人，一起学习还能赚佣金",
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"notLoginUnlockDesc": "",
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"notLoginPaywallTip": "转发给需要的人，一起学习还能赚佣金",
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"shareTipLine": "转发给需要的人，一起学习还能赚佣金",
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"momentsModalTitle": "分享到朋友圈",
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"momentsModalContent": "已复制发圈文案（非分享给好友）。\n\n请点击右上角「···」→「分享到朋友圈」粘贴发布。",
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"momentsClipboardFooter": "\n\n—— 以上为正文预览约 {percent}% ，搜「卡若创业派对」小程序阅读全文 ——",
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"timelineImageUrl": "",
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}
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}
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// mergeReadPreviewUI 合并 system_config.read_preview_ui（JSON 对象）与默认文案；占位符 {percent}/{price} 由小程序替换
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func mergeReadPreviewUI(db *gorm.DB) map[string]string {
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out := defaultReadPreviewUI()
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var row model.SystemConfig
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if err := db.Where("config_key = ?", "read_preview_ui").First(&row).Error; err != nil || len(row.ConfigValue) == 0 {
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return out
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}
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var raw map[string]interface{}
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if err := json.Unmarshal(row.ConfigValue, &raw); err != nil {
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return out
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}
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for k, v := range raw {
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switch t := v.(type) {
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case string:
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if strings.TrimSpace(t) != "" {
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out[k] = strings.TrimSpace(t)
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}
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default:
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// 兼容数字等被误存：忽略非字符串
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}
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}
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return out
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}
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